diff options
Diffstat (limited to 'thirdparty/bullet')
77 files changed, 8799 insertions, 7852 deletions
diff --git a/thirdparty/bullet/Bullet3OpenCL/NarrowphaseCollision/b3OptimizedBvh.cpp b/thirdparty/bullet/Bullet3OpenCL/NarrowphaseCollision/b3OptimizedBvh.cpp index 6f2c5251a0..4938fa17af 100644 --- a/thirdparty/bullet/Bullet3OpenCL/NarrowphaseCollision/b3OptimizedBvh.cpp +++ b/thirdparty/bullet/Bullet3OpenCL/NarrowphaseCollision/b3OptimizedBvh.cpp @@ -285,7 +285,6 @@ void b3OptimizedBvh::updateBvhNodes(b3StridingMeshInterface* meshInterface, int meshInterface->getLockedReadOnlyVertexIndexBase(&vertexbase, numverts, type, stride, &indexbase, indexstride, numfaces, indicestype, nodeSubPart); curNodeSubPart = nodeSubPart; - b3Assert(indicestype == PHY_INTEGER || indicestype == PHY_SHORT); } //triangles->getLockedReadOnlyVertexIndexBase(vertexBase,numVerts, @@ -293,7 +292,13 @@ void b3OptimizedBvh::updateBvhNodes(b3StridingMeshInterface* meshInterface, int for (int j = 2; j >= 0; j--) { - int graphicsindex = indicestype == PHY_SHORT ? ((unsigned short*)gfxbase)[j] : gfxbase[j]; + int graphicsindex; + switch (indicestype) { + case PHY_INTEGER: graphicsindex = gfxbase[j]; break; + case PHY_SHORT: graphicsindex = ((unsigned short*)gfxbase)[j]; break; + case PHY_UCHAR: graphicsindex = ((unsigned char*)gfxbase)[j]; break; + default: b3Assert(0); + } if (type == PHY_FLOAT) { float* graphicsbase = (float*)(vertexbase + graphicsindex * stride); diff --git a/thirdparty/bullet/Bullet3Serialize/Bullet2FileLoader/b3File.cpp b/thirdparty/bullet/Bullet3Serialize/Bullet2FileLoader/b3File.cpp index 145de62db3..f6c779a919 100644 --- a/thirdparty/bullet/Bullet3Serialize/Bullet2FileLoader/b3File.cpp +++ b/thirdparty/bullet/Bullet3Serialize/Bullet2FileLoader/b3File.cpp @@ -851,12 +851,12 @@ void bFile::swapData(char *data, short type, int arraySize, bool ignoreEndianFla void bFile::safeSwapPtr(char *dst, const char *src) { + if (!src || !dst) + return; + int ptrFile = mFileDNA->getPointerSize(); int ptrMem = mMemoryDNA->getPointerSize(); - if (!src && !dst) - return; - if (ptrFile == ptrMem) { memcpy(dst, src, ptrMem); diff --git a/thirdparty/bullet/BulletCollision/BroadphaseCollision/btQuantizedBvh.cpp b/thirdparty/bullet/BulletCollision/BroadphaseCollision/btQuantizedBvh.cpp index 4954e773e2..19f1737b73 100644 --- a/thirdparty/bullet/BulletCollision/BroadphaseCollision/btQuantizedBvh.cpp +++ b/thirdparty/bullet/BulletCollision/BroadphaseCollision/btQuantizedBvh.cpp @@ -346,8 +346,6 @@ void btQuantizedBvh::reportAabbOverlappingNodex(btNodeOverlapCallback* nodeCallb } } -int maxIterations = 0; - void btQuantizedBvh::walkStacklessTree(btNodeOverlapCallback* nodeCallback, const btVector3& aabbMin, const btVector3& aabbMax) const { btAssert(!m_useQuantization); @@ -387,8 +385,6 @@ void btQuantizedBvh::walkStacklessTree(btNodeOverlapCallback* nodeCallback, cons curIndex += escapeIndex; } } - if (maxIterations < walkIterations) - maxIterations = walkIterations; } /* @@ -529,8 +525,6 @@ void btQuantizedBvh::walkStacklessTreeAgainstRay(btNodeOverlapCallback* nodeCall curIndex += escapeIndex; } } - if (maxIterations < walkIterations) - maxIterations = walkIterations; } void btQuantizedBvh::walkStacklessQuantizedTreeAgainstRay(btNodeOverlapCallback* nodeCallback, const btVector3& raySource, const btVector3& rayTarget, const btVector3& aabbMin, const btVector3& aabbMax, int startNodeIndex, int endNodeIndex) const @@ -654,8 +648,6 @@ void btQuantizedBvh::walkStacklessQuantizedTreeAgainstRay(btNodeOverlapCallback* curIndex += escapeIndex; } } - if (maxIterations < walkIterations) - maxIterations = walkIterations; } void btQuantizedBvh::walkStacklessQuantizedTree(btNodeOverlapCallback* nodeCallback, unsigned short int* quantizedQueryAabbMin, unsigned short int* quantizedQueryAabbMax, int startNodeIndex, int endNodeIndex) const @@ -718,8 +710,6 @@ void btQuantizedBvh::walkStacklessQuantizedTree(btNodeOverlapCallback* nodeCallb curIndex += escapeIndex; } } - if (maxIterations < walkIterations) - maxIterations = walkIterations; } //This traversal can be called from Playstation 3 SPU diff --git a/thirdparty/bullet/BulletCollision/CollisionDispatch/btCollisionObject.h b/thirdparty/bullet/BulletCollision/CollisionDispatch/btCollisionObject.h index 85dc488c8c..e085c40892 100644 --- a/thirdparty/bullet/BulletCollision/CollisionDispatch/btCollisionObject.h +++ b/thirdparty/bullet/BulletCollision/CollisionDispatch/btCollisionObject.h @@ -127,6 +127,7 @@ public: enum CollisionFlags { + CF_DYNAMIC_OBJECT = 0, CF_STATIC_OBJECT = 1, CF_KINEMATIC_OBJECT = 2, CF_NO_CONTACT_RESPONSE = 4, @@ -251,6 +252,16 @@ public: m_checkCollideWith = m_objectsWithoutCollisionCheck.size() > 0; } + int getNumObjectsWithoutCollision() const + { + return m_objectsWithoutCollisionCheck.size(); + } + + const btCollisionObject* getObjectWithoutCollision(int index) + { + return m_objectsWithoutCollisionCheck[index]; + } + virtual bool checkCollideWithOverride(const btCollisionObject* co) const { int index = m_objectsWithoutCollisionCheck.findLinearSearch(co); diff --git a/thirdparty/bullet/BulletCollision/CollisionDispatch/btInternalEdgeUtility.cpp b/thirdparty/bullet/BulletCollision/CollisionDispatch/btInternalEdgeUtility.cpp index a4252c296a..a71700f58a 100644 --- a/thirdparty/bullet/BulletCollision/CollisionDispatch/btInternalEdgeUtility.cpp +++ b/thirdparty/bullet/BulletCollision/CollisionDispatch/btInternalEdgeUtility.cpp @@ -361,7 +361,13 @@ void btGenerateInternalEdgeInfo(btBvhTriangleMeshShape* trimeshShape, btTriangle for (int j = 2; j >= 0; j--) { - int graphicsindex = indicestype == PHY_SHORT ? ((unsigned short*)gfxbase)[j] : gfxbase[j]; + int graphicsindex; + switch (indicestype) { + case PHY_INTEGER: graphicsindex = gfxbase[j]; break; + case PHY_SHORT: graphicsindex = ((unsigned short*)gfxbase)[j]; break; + case PHY_UCHAR: graphicsindex = ((unsigned char*)gfxbase)[j]; break; + default: btAssert(0); + } if (type == PHY_FLOAT) { float* graphicsbase = (float*)(vertexbase + graphicsindex * stride); diff --git a/thirdparty/bullet/BulletCollision/CollisionShapes/btBvhTriangleMeshShape.cpp b/thirdparty/bullet/BulletCollision/CollisionShapes/btBvhTriangleMeshShape.cpp index d663b3d6d6..c66ce58e3e 100644 --- a/thirdparty/bullet/BulletCollision/CollisionShapes/btBvhTriangleMeshShape.cpp +++ b/thirdparty/bullet/BulletCollision/CollisionShapes/btBvhTriangleMeshShape.cpp @@ -124,12 +124,17 @@ void btBvhTriangleMeshShape::performRaycast(btTriangleCallback* callback, const nodeSubPart); unsigned int* gfxbase = (unsigned int*)(indexbase + nodeTriangleIndex * indexstride); - btAssert(indicestype == PHY_INTEGER || indicestype == PHY_SHORT); const btVector3& meshScaling = m_meshInterface->getScaling(); for (int j = 2; j >= 0; j--) { - int graphicsindex = indicestype == PHY_SHORT ? ((unsigned short*)gfxbase)[j] : gfxbase[j]; + int graphicsindex; + switch (indicestype) { + case PHY_INTEGER: graphicsindex = gfxbase[j]; break; + case PHY_SHORT: graphicsindex = ((unsigned short*)gfxbase)[j]; break; + case PHY_UCHAR: graphicsindex = ((unsigned char*)gfxbase)[j]; break; + default: btAssert(0); + } if (type == PHY_FLOAT) { @@ -193,12 +198,17 @@ void btBvhTriangleMeshShape::performConvexcast(btTriangleCallback* callback, con nodeSubPart); unsigned int* gfxbase = (unsigned int*)(indexbase + nodeTriangleIndex * indexstride); - btAssert(indicestype == PHY_INTEGER || indicestype == PHY_SHORT); const btVector3& meshScaling = m_meshInterface->getScaling(); for (int j = 2; j >= 0; j--) { - int graphicsindex = indicestype == PHY_SHORT ? ((unsigned short*)gfxbase)[j] : gfxbase[j]; + int graphicsindex; + switch (indicestype) { + case PHY_INTEGER: graphicsindex = gfxbase[j]; break; + case PHY_SHORT: graphicsindex = ((unsigned short*)gfxbase)[j]; break; + case PHY_UCHAR: graphicsindex = ((unsigned char*)gfxbase)[j]; break; + default: btAssert(0); + } if (type == PHY_FLOAT) { diff --git a/thirdparty/bullet/BulletCollision/CollisionShapes/btCollisionShape.h b/thirdparty/bullet/BulletCollision/CollisionShapes/btCollisionShape.h index c80e105a4d..16f9e0c77a 100644 --- a/thirdparty/bullet/BulletCollision/CollisionShapes/btCollisionShape.h +++ b/thirdparty/bullet/BulletCollision/CollisionShapes/btCollisionShape.h @@ -30,11 +30,12 @@ protected: int m_shapeType; void* m_userPointer; int m_userIndex; + int m_userIndex2; public: BT_DECLARE_ALIGNED_ALLOCATOR(); - btCollisionShape() : m_shapeType(INVALID_SHAPE_PROXYTYPE), m_userPointer(0), m_userIndex(-1) + btCollisionShape() : m_shapeType(INVALID_SHAPE_PROXYTYPE), m_userPointer(0), m_userIndex(-1), m_userIndex2(-1) { } @@ -137,6 +138,16 @@ public: return m_userIndex; } + void setUserIndex2(int index) + { + m_userIndex2 = index; + } + + int getUserIndex2() const + { + return m_userIndex2; + } + virtual int calculateSerializeBufferSize() const; ///fills the dataBuffer and returns the struct name (and 0 on failure) diff --git a/thirdparty/bullet/BulletCollision/CollisionShapes/btHeightfieldTerrainShape.cpp b/thirdparty/bullet/BulletCollision/CollisionShapes/btHeightfieldTerrainShape.cpp index 34e7926f17..cab6980b65 100644 --- a/thirdparty/bullet/BulletCollision/CollisionShapes/btHeightfieldTerrainShape.cpp +++ b/thirdparty/bullet/BulletCollision/CollisionShapes/btHeightfieldTerrainShape.cpp @@ -21,8 +21,7 @@ btHeightfieldTerrainShape::btHeightfieldTerrainShape( int heightStickWidth, int heightStickLength, const void* heightfieldData, btScalar heightScale, btScalar minHeight, btScalar maxHeight, int upAxis, PHY_ScalarType hdt, bool flipQuadEdges) - :m_userIndex2(-1), - m_userValue3(0), + :m_userValue3(0), m_triangleInfoMap(0) { initialize(heightStickWidth, heightStickLength, heightfieldData, @@ -31,8 +30,7 @@ btHeightfieldTerrainShape::btHeightfieldTerrainShape( } btHeightfieldTerrainShape::btHeightfieldTerrainShape(int heightStickWidth, int heightStickLength, const void* heightfieldData, btScalar maxHeight, int upAxis, bool useFloatData, bool flipQuadEdges) - :m_userIndex2(-1), - m_userValue3(0), + : m_userValue3(0), m_triangleInfoMap(0) { // legacy constructor: support only float or unsigned char, diff --git a/thirdparty/bullet/BulletCollision/CollisionShapes/btHeightfieldTerrainShape.h b/thirdparty/bullet/BulletCollision/CollisionShapes/btHeightfieldTerrainShape.h index 8dea98fc6b..2cf3c00721 100644 --- a/thirdparty/bullet/BulletCollision/CollisionShapes/btHeightfieldTerrainShape.h +++ b/thirdparty/bullet/BulletCollision/CollisionShapes/btHeightfieldTerrainShape.h @@ -114,7 +114,7 @@ protected: int m_vboundsGridLength; int m_vboundsChunkSize; - int m_userIndex2; + btScalar m_userValue3; struct btTriangleInfoMap* m_triangleInfoMap; @@ -192,14 +192,6 @@ public: virtual const char* getName() const { return "HEIGHTFIELD"; } - void setUserIndex2(int index) - { - m_userIndex2 = index; - } - int getUserIndex2() const - { - return m_userIndex2; - } void setUserValue3(btScalar value) { m_userValue3 = value; diff --git a/thirdparty/bullet/BulletCollision/CollisionShapes/btOptimizedBvh.cpp b/thirdparty/bullet/BulletCollision/CollisionShapes/btOptimizedBvh.cpp index 687399e0a9..863ea6d6ac 100644 --- a/thirdparty/bullet/BulletCollision/CollisionShapes/btOptimizedBvh.cpp +++ b/thirdparty/bullet/BulletCollision/CollisionShapes/btOptimizedBvh.cpp @@ -286,7 +286,6 @@ void btOptimizedBvh::updateBvhNodes(btStridingMeshInterface* meshInterface, int meshInterface->getLockedReadOnlyVertexIndexBase(&vertexbase, numverts, type, stride, &indexbase, indexstride, numfaces, indicestype, nodeSubPart); curNodeSubPart = nodeSubPart; - btAssert(indicestype == PHY_INTEGER || indicestype == PHY_SHORT); } //triangles->getLockedReadOnlyVertexIndexBase(vertexBase,numVerts, @@ -294,7 +293,13 @@ void btOptimizedBvh::updateBvhNodes(btStridingMeshInterface* meshInterface, int for (int j = 2; j >= 0; j--) { - int graphicsindex = indicestype == PHY_SHORT ? ((unsigned short*)gfxbase)[j] : gfxbase[j]; + int graphicsindex; + switch (indicestype) { + case PHY_INTEGER: graphicsindex = gfxbase[j]; break; + case PHY_SHORT: graphicsindex = ((unsigned short*)gfxbase)[j]; break; + case PHY_UCHAR: graphicsindex = ((unsigned char*)gfxbase)[j]; break; + default: btAssert(0); + } if (type == PHY_FLOAT) { float* graphicsbase = (float*)(vertexbase + graphicsindex * stride); diff --git a/thirdparty/bullet/BulletCollision/CollisionShapes/btSdfCollisionShape.cpp b/thirdparty/bullet/BulletCollision/CollisionShapes/btSdfCollisionShape.cpp index 4a95dbea4f..23c95ad3ff 100644 --- a/thirdparty/bullet/BulletCollision/CollisionShapes/btSdfCollisionShape.cpp +++ b/thirdparty/bullet/BulletCollision/CollisionShapes/btSdfCollisionShape.cpp @@ -2,8 +2,11 @@ #include "btMiniSDF.h" #include "LinearMath/btAabbUtil2.h" -struct btSdfCollisionShapeInternalData +ATTRIBUTE_ALIGNED16(struct) +btSdfCollisionShapeInternalData { + BT_DECLARE_ALIGNED_ALLOCATOR(); + btVector3 m_localScaling; btScalar m_margin; btMiniSDF m_sdf; diff --git a/thirdparty/bullet/BulletCollision/Gimpact/btGImpactShape.h b/thirdparty/bullet/BulletCollision/Gimpact/btGImpactShape.h index 5b85e87041..cc91079579 100644 --- a/thirdparty/bullet/BulletCollision/Gimpact/btGImpactShape.h +++ b/thirdparty/bullet/BulletCollision/Gimpact/btGImpactShape.h @@ -623,13 +623,21 @@ public: i1 = s_indices[1]; i2 = s_indices[2]; } - else + else if (indicestype == PHY_INTEGER) { unsigned int* i_indices = (unsigned int*)(indexbase + face_index * indexstride); i0 = i_indices[0]; i1 = i_indices[1]; i2 = i_indices[2]; } + else + { + btAssert(indicestype == PHY_UCHAR); + unsigned char* i_indices = (unsigned char*)(indexbase + face_index * indexstride); + i0 = i_indices[0]; + i1 = i_indices[1]; + i2 = i_indices[2]; + } } SIMD_FORCE_INLINE void get_vertex(unsigned int vertex_index, btVector3& vertex) const diff --git a/thirdparty/bullet/BulletCollision/NarrowPhaseCollision/btGjkEpa2.cpp b/thirdparty/bullet/BulletCollision/NarrowPhaseCollision/btGjkEpa2.cpp index 45d1817135..7d53f8624a 100644 --- a/thirdparty/bullet/BulletCollision/NarrowPhaseCollision/btGjkEpa2.cpp +++ b/thirdparty/bullet/BulletCollision/NarrowPhaseCollision/btGjkEpa2.cpp @@ -1049,7 +1049,8 @@ btScalar btGjkEpaSolver2::SignedDistance(const btVector3& position, const btScalar length = delta.length(); results.normal = delta / length; results.witnesses[0] += results.normal * margin; - return (length - margin); + results.distance = length - margin; + return results.distance; } else { diff --git a/thirdparty/bullet/BulletDynamics/ConstraintSolver/btBatchedConstraints.cpp b/thirdparty/bullet/BulletDynamics/ConstraintSolver/btBatchedConstraints.cpp index 27f76b8425..0f5ed1c2ce 100644 --- a/thirdparty/bullet/BulletDynamics/ConstraintSolver/btBatchedConstraints.cpp +++ b/thirdparty/bullet/BulletDynamics/ConstraintSolver/btBatchedConstraints.cpp @@ -852,7 +852,7 @@ static void setupSpatialGridBatchesMt( memHelper.addChunk((void**)&constraintRowBatchIds, sizeof(int) * numConstraintRows); size_t scratchSize = memHelper.getSizeToAllocate(); // if we need to reallocate - if (scratchMemory->capacity() < scratchSize) + if (static_cast<size_t>(scratchMemory->capacity()) < scratchSize) { // allocate 6.25% extra to avoid repeated reallocs scratchMemory->reserve(scratchSize + scratchSize / 16); diff --git a/thirdparty/bullet/BulletDynamics/ConstraintSolver/btContactSolverInfo.h b/thirdparty/bullet/BulletDynamics/ConstraintSolver/btContactSolverInfo.h index 4356c12abf..3316403a87 100644 --- a/thirdparty/bullet/BulletDynamics/ConstraintSolver/btContactSolverInfo.h +++ b/thirdparty/bullet/BulletDynamics/ConstraintSolver/btContactSolverInfo.h @@ -47,6 +47,8 @@ struct btContactSolverInfoData btScalar m_erp; //error reduction for non-contact constraints btScalar m_erp2; //error reduction for contact constraints btScalar m_deformable_erp; //error reduction for deformable constraints + btScalar m_deformable_cfm; //constraint force mixing for deformable constraints + btScalar m_deformable_maxErrorReduction; // maxErrorReduction for deformable contact btScalar m_globalCfm; //constraint force mixing for contacts and non-contacts btScalar m_frictionERP; //error reduction for friction constraints btScalar m_frictionCFM; //constraint force mixing for friction constraints @@ -83,7 +85,9 @@ struct btContactSolverInfo : public btContactSolverInfoData m_numIterations = 10; m_erp = btScalar(0.2); m_erp2 = btScalar(0.2); - m_deformable_erp = btScalar(0.1); + m_deformable_erp = btScalar(0.06); + m_deformable_cfm = btScalar(0.01); + m_deformable_maxErrorReduction = btScalar(0.1); m_globalCfm = btScalar(0.); m_frictionERP = btScalar(0.2); //positional friction 'anchors' are disabled by default m_frictionCFM = btScalar(0.); diff --git a/thirdparty/bullet/BulletDynamics/ConstraintSolver/btSliderConstraint.cpp b/thirdparty/bullet/BulletDynamics/ConstraintSolver/btSliderConstraint.cpp index cac5302a73..cac5302a73 100755..100644 --- a/thirdparty/bullet/BulletDynamics/ConstraintSolver/btSliderConstraint.cpp +++ b/thirdparty/bullet/BulletDynamics/ConstraintSolver/btSliderConstraint.cpp diff --git a/thirdparty/bullet/BulletDynamics/ConstraintSolver/btSliderConstraint.h b/thirdparty/bullet/BulletDynamics/ConstraintSolver/btSliderConstraint.h index 75ca34e978..75ca34e978 100755..100644 --- a/thirdparty/bullet/BulletDynamics/ConstraintSolver/btSliderConstraint.h +++ b/thirdparty/bullet/BulletDynamics/ConstraintSolver/btSliderConstraint.h diff --git a/thirdparty/bullet/BulletDynamics/Dynamics/btRigidBody.h b/thirdparty/bullet/BulletDynamics/Dynamics/btRigidBody.h index 943d724cce..7442dd1e6a 100644 --- a/thirdparty/bullet/BulletDynamics/Dynamics/btRigidBody.h +++ b/thirdparty/bullet/BulletDynamics/Dynamics/btRigidBody.h @@ -356,12 +356,12 @@ public: } } - btVector3 getPushVelocity() + btVector3 getPushVelocity() const { return m_pushVelocity; } - btVector3 getTurnVelocity() + btVector3 getTurnVelocity() const { return m_turnVelocity; } @@ -465,6 +465,12 @@ public: //for kinematic objects, we could also use use: // return (m_worldTransform(rel_pos) - m_interpolationWorldTransform(rel_pos)) / m_kinematicTimeStep; } + + btVector3 getPushVelocityInLocalPoint(const btVector3& rel_pos) const + { + //we also calculate lin/ang velocity for kinematic objects + return m_pushVelocity + m_turnVelocity.cross(rel_pos); + } void translate(const btVector3& v) { diff --git a/thirdparty/bullet/BulletDynamics/Featherstone/btMultiBody.cpp b/thirdparty/bullet/BulletDynamics/Featherstone/btMultiBody.cpp index a1d5bb9ca8..7cb92fa3b4 100644 --- a/thirdparty/bullet/BulletDynamics/Featherstone/btMultiBody.cpp +++ b/thirdparty/bullet/BulletDynamics/Featherstone/btMultiBody.cpp @@ -125,7 +125,8 @@ btMultiBody::btMultiBody(int n_links, m_posVarCnt(0), m_useRK4(false), m_useGlobalVelocities(false), - m_internalNeedsJointFeedback(false) + m_internalNeedsJointFeedback(false), + m_kinematic_calculate_velocity(false) { m_cachedInertiaTopLeft.setValue(0, 0, 0, 0, 0, 0, 0, 0, 0); m_cachedInertiaTopRight.setValue(0, 0, 0, 0, 0, 0, 0, 0, 0); @@ -344,6 +345,8 @@ void btMultiBody::finalizeMultiDof() { m_deltaV.resize(0); m_deltaV.resize(6 + m_dofCount); + m_splitV.resize(0); + m_splitV.resize(6 + m_dofCount); m_realBuf.resize(6 + m_dofCount + m_dofCount * m_dofCount + 6 + m_dofCount); //m_dofCount for joint-space vels + m_dofCount^2 for "D" matrices + delta-pos vector (6 base "vels" + joint "vels") m_vectorBuf.resize(2 * m_dofCount); //two 3-vectors (i.e. one six-vector) for each system dof ("h" matrices) m_matrixBuf.resize(m_links.size() + 1); @@ -671,6 +674,30 @@ btScalar *btMultiBody::getJointTorqueMultiDof(int i) return &m_links[i].m_jointTorque[0]; } +bool btMultiBody::hasFixedBase() const +{ + return m_fixedBase || (getBaseCollider() && getBaseCollider()->isStaticObject()); +} + +bool btMultiBody::isBaseStaticOrKinematic() const +{ + return m_fixedBase || (getBaseCollider() && getBaseCollider()->isStaticOrKinematicObject()); +} + +bool btMultiBody::isBaseKinematic() const +{ + return getBaseCollider() && getBaseCollider()->isKinematicObject(); +} + +void btMultiBody::setBaseDynamicType(int dynamicType) +{ + if(getBaseCollider()) { + int oldFlags = getBaseCollider()->getCollisionFlags(); + oldFlags &= ~(btCollisionObject::CF_STATIC_OBJECT | btCollisionObject::CF_KINEMATIC_OBJECT); + getBaseCollider()->setCollisionFlags(oldFlags | dynamicType); + } +} + inline btMatrix3x3 outerProduct(const btVector3 &v0, const btVector3 &v1) //renamed it from vecMulVecTranspose (http://en.wikipedia.org/wiki/Outer_product); maybe it should be moved to btVector3 like dot and cross? { btVector3 row0 = btVector3( @@ -796,7 +823,7 @@ void btMultiBody::computeAccelerationsArticulatedBodyAlgorithmMultiDof(btScalar //create the vector of spatial velocity of the base by transforming global-coor linear and angular velocities into base-local coordinates spatVel[0].setVector(rot_from_parent[0] * base_omega, rot_from_parent[0] * base_vel); - if (m_fixedBase) + if (isBaseStaticOrKinematic()) { zeroAccSpatFrc[0].setZero(); } @@ -872,31 +899,53 @@ void btMultiBody::computeAccelerationsArticulatedBodyAlgorithmMultiDof(btScalar // calculate zhat_i^A // - //external forces - btVector3 linkAppliedForce = isConstraintPass ? m_links[i].m_appliedConstraintForce : m_links[i].m_appliedForce; - btVector3 linkAppliedTorque = isConstraintPass ? m_links[i].m_appliedConstraintTorque : m_links[i].m_appliedTorque; + if (isLinkAndAllAncestorsKinematic(i)) + { + zeroAccSpatFrc[i].setZero(); + } + else{ + //external forces + btVector3 linkAppliedForce = isConstraintPass ? m_links[i].m_appliedConstraintForce : m_links[i].m_appliedForce; + btVector3 linkAppliedTorque = isConstraintPass ? m_links[i].m_appliedConstraintTorque : m_links[i].m_appliedTorque; - zeroAccSpatFrc[i + 1].setVector(-(rot_from_world[i + 1] * linkAppliedTorque), -(rot_from_world[i + 1] * linkAppliedForce)); + zeroAccSpatFrc[i + 1].setVector(-(rot_from_world[i + 1] * linkAppliedTorque), -(rot_from_world[i + 1] * linkAppliedForce)); #if 0 - { + { - b3Printf("stepVelocitiesMultiDof zeroAccSpatFrc[%d] linear:%f,%f,%f, angular:%f,%f,%f", - i+1, - zeroAccSpatFrc[i+1].m_topVec[0], - zeroAccSpatFrc[i+1].m_topVec[1], - zeroAccSpatFrc[i+1].m_topVec[2], + b3Printf("stepVelocitiesMultiDof zeroAccSpatFrc[%d] linear:%f,%f,%f, angular:%f,%f,%f", + i+1, + zeroAccSpatFrc[i+1].m_topVec[0], + zeroAccSpatFrc[i+1].m_topVec[1], + zeroAccSpatFrc[i+1].m_topVec[2], - zeroAccSpatFrc[i+1].m_bottomVec[0], - zeroAccSpatFrc[i+1].m_bottomVec[1], - zeroAccSpatFrc[i+1].m_bottomVec[2]); - } + zeroAccSpatFrc[i+1].m_bottomVec[0], + zeroAccSpatFrc[i+1].m_bottomVec[1], + zeroAccSpatFrc[i+1].m_bottomVec[2]); + } #endif - // - //adding damping terms (only) - btScalar linDampMult = 1., angDampMult = 1.; - zeroAccSpatFrc[i + 1].addVector(angDampMult * m_links[i].m_inertiaLocal * spatVel[i + 1].getAngular() * (DAMPING_K1_ANGULAR + DAMPING_K2_ANGULAR * spatVel[i + 1].getAngular().safeNorm()), - linDampMult * m_links[i].m_mass * spatVel[i + 1].getLinear() * (DAMPING_K1_LINEAR + DAMPING_K2_LINEAR * spatVel[i + 1].getLinear().safeNorm())); + // + //adding damping terms (only) + btScalar linDampMult = 1., angDampMult = 1.; + zeroAccSpatFrc[i + 1].addVector(angDampMult * m_links[i].m_inertiaLocal * spatVel[i + 1].getAngular() * (DAMPING_K1_ANGULAR + DAMPING_K2_ANGULAR * spatVel[i + 1].getAngular().safeNorm()), + linDampMult * m_links[i].m_mass * spatVel[i + 1].getLinear() * (DAMPING_K1_LINEAR + DAMPING_K2_LINEAR * spatVel[i + 1].getLinear().safeNorm())); + //p += vhat x Ihat vhat - done in a simpler way + if (m_useGyroTerm) + zeroAccSpatFrc[i + 1].addAngular(spatVel[i + 1].getAngular().cross(m_links[i].m_inertiaLocal * spatVel[i + 1].getAngular())); + // + zeroAccSpatFrc[i + 1].addLinear(m_links[i].m_mass * spatVel[i + 1].getAngular().cross(spatVel[i + 1].getLinear())); + // + //btVector3 temp = m_links[i].m_mass * spatVel[i+1].getAngular().cross(spatVel[i+1].getLinear()); + ////clamp parent's omega + //btScalar parOmegaMod = temp.length(); + //btScalar parOmegaModMax = 1000; + //if(parOmegaMod > parOmegaModMax) + // temp *= parOmegaModMax / parOmegaMod; + //zeroAccSpatFrc[i+1].addLinear(temp); + //printf("|zeroAccSpatFrc[%d]| = %.4f\n", i+1, temp.length()); + //temp = spatCoriolisAcc[i].getLinear(); + //printf("|spatCoriolisAcc[%d]| = %.4f\n", i+1, temp.length()); + } // calculate Ihat_i^A //init the spatial AB inertia (it has the simple form thanks to choosing local body frames origins at their COMs) @@ -909,22 +958,6 @@ void btMultiBody::computeAccelerationsArticulatedBodyAlgorithmMultiDof(btScalar btMatrix3x3(m_links[i].m_inertiaLocal[0], 0, 0, 0, m_links[i].m_inertiaLocal[1], 0, 0, 0, m_links[i].m_inertiaLocal[2])); - // - //p += vhat x Ihat vhat - done in a simpler way - if (m_useGyroTerm) - zeroAccSpatFrc[i + 1].addAngular(spatVel[i + 1].getAngular().cross(m_links[i].m_inertiaLocal * spatVel[i + 1].getAngular())); - // - zeroAccSpatFrc[i + 1].addLinear(m_links[i].m_mass * spatVel[i + 1].getAngular().cross(spatVel[i + 1].getLinear())); - //btVector3 temp = m_links[i].m_mass * spatVel[i+1].getAngular().cross(spatVel[i+1].getLinear()); - ////clamp parent's omega - //btScalar parOmegaMod = temp.length(); - //btScalar parOmegaModMax = 1000; - //if(parOmegaMod > parOmegaModMax) - // temp *= parOmegaModMax / parOmegaMod; - //zeroAccSpatFrc[i+1].addLinear(temp); - //printf("|zeroAccSpatFrc[%d]| = %.4f\n", i+1, temp.length()); - //temp = spatCoriolisAcc[i].getLinear(); - //printf("|spatCoriolisAcc[%d]| = %.4f\n", i+1, temp.length()); //printf("w[%d] = [%.4f %.4f %.4f]\n", i, vel_top_angular[i+1].x(), vel_top_angular[i+1].y(), vel_top_angular[i+1].z()); //printf("v[%d] = [%.4f %.4f %.4f]\n", i, vel_bottom_linear[i+1].x(), vel_bottom_linear[i+1].y(), vel_bottom_linear[i+1].z()); @@ -935,6 +968,8 @@ void btMultiBody::computeAccelerationsArticulatedBodyAlgorithmMultiDof(btScalar // (part of TreeForwardDynamics in Mirtich.) for (int i = num_links - 1; i >= 0; --i) { + if(isLinkAndAllAncestorsKinematic(i)) + continue; const int parent = m_links[i].m_parent; fromParent.m_rotMat = rot_from_parent[i + 1]; fromParent.m_trnVec = m_links[i].m_cachedRVector; @@ -1047,7 +1082,7 @@ void btMultiBody::computeAccelerationsArticulatedBodyAlgorithmMultiDof(btScalar // Second 'upward' loop // (part of TreeForwardDynamics in Mirtich) - if (m_fixedBase) + if (isBaseStaticOrKinematic()) { spatAcc[0].setZero(); } @@ -1081,21 +1116,23 @@ void btMultiBody::computeAccelerationsArticulatedBodyAlgorithmMultiDof(btScalar fromParent.transform(spatAcc[parent + 1], spatAcc[i + 1]); - for (int dof = 0; dof < m_links[i].m_dofCount; ++dof) + if(!isLinkAndAllAncestorsKinematic(i)) { - const btSpatialForceVector &hDof = h[m_links[i].m_dofOffset + dof]; - // - Y_minus_hT_a[dof] = Y[m_links[i].m_dofOffset + dof] - spatAcc[i + 1].dot(hDof); - } - - btScalar *invDi = &invD[m_links[i].m_dofOffset * m_links[i].m_dofOffset]; - //D^{-1} * (Y - h^{T}*apar) - mulMatrix(invDi, Y_minus_hT_a, m_links[i].m_dofCount, m_links[i].m_dofCount, m_links[i].m_dofCount, 1, &joint_accel[m_links[i].m_dofOffset]); + for (int dof = 0; dof < m_links[i].m_dofCount; ++dof) + { + const btSpatialForceVector &hDof = h[m_links[i].m_dofOffset + dof]; + // + Y_minus_hT_a[dof] = Y[m_links[i].m_dofOffset + dof] - spatAcc[i + 1].dot(hDof); + } + btScalar *invDi = &invD[m_links[i].m_dofOffset * m_links[i].m_dofOffset]; + //D^{-1} * (Y - h^{T}*apar) + mulMatrix(invDi, Y_minus_hT_a, m_links[i].m_dofCount, m_links[i].m_dofCount, m_links[i].m_dofCount, 1, &joint_accel[m_links[i].m_dofOffset]); - spatAcc[i + 1] += spatCoriolisAcc[i]; + spatAcc[i + 1] += spatCoriolisAcc[i]; - for (int dof = 0; dof < m_links[i].m_dofCount; ++dof) - spatAcc[i + 1] += m_links[i].m_axes[dof] * joint_accel[m_links[i].m_dofOffset + dof]; + for (int dof = 0; dof < m_links[i].m_dofCount; ++dof) + spatAcc[i + 1] += m_links[i].m_axes[dof] * joint_accel[m_links[i].m_dofOffset + dof]; + } if (m_links[i].m_jointFeedback) { @@ -1432,7 +1469,7 @@ void btMultiBody::calcAccelerationDeltasMultiDof(const btScalar *force, btScalar // Fill in zero_acc // -- set to force/torque on the base, zero otherwise - if (m_fixedBase) + if (isBaseStaticOrKinematic()) { zeroAccSpatFrc[0].setZero(); } @@ -1451,6 +1488,8 @@ void btMultiBody::calcAccelerationDeltasMultiDof(const btScalar *force, btScalar // (part of TreeForwardDynamics in Mirtich.) for (int i = num_links - 1; i >= 0; --i) { + if(isLinkAndAllAncestorsKinematic(i)) + continue; const int parent = m_links[i].m_parent; fromParent.m_rotMat = rot_from_parent[i + 1]; fromParent.m_trnVec = m_links[i].m_cachedRVector; @@ -1494,7 +1533,7 @@ void btMultiBody::calcAccelerationDeltasMultiDof(const btScalar *force, btScalar // Second 'upward' loop // (part of TreeForwardDynamics in Mirtich) - if (m_fixedBase) + if (isBaseStaticOrKinematic()) { spatAcc[0].setZero(); } @@ -1507,6 +1546,8 @@ void btMultiBody::calcAccelerationDeltasMultiDof(const btScalar *force, btScalar // now do the loop over the m_links for (int i = 0; i < num_links; ++i) { + if(isLinkAndAllAncestorsKinematic(i)) + continue; const int parent = m_links[i].m_parent; fromParent.m_rotMat = rot_from_parent[i + 1]; fromParent.m_trnVec = m_links[i].m_cachedRVector; @@ -1550,23 +1591,26 @@ void btMultiBody::calcAccelerationDeltasMultiDof(const btScalar *force, btScalar void btMultiBody::predictPositionsMultiDof(btScalar dt) { int num_links = getNumLinks(); - // step position by adding dt * velocity - //btVector3 v = getBaseVel(); - //m_basePos += dt * v; - // - btScalar *pBasePos; - btScalar *pBaseVel = &m_realBuf[3]; //note: the !pqd case assumes m_realBuf holds with base velocity at 3,4,5 (should be wrapped for safety) - - // reset to current position - for (int i = 0; i < 3; ++i) - { - m_basePos_interpolate[i] = m_basePos[i]; - } - pBasePos = m_basePos_interpolate; + if(!isBaseKinematic()) + { + // step position by adding dt * velocity + //btVector3 v = getBaseVel(); + //m_basePos += dt * v; + // + btScalar *pBasePos; + btScalar *pBaseVel = &m_realBuf[3]; //note: the !pqd case assumes m_realBuf holds with base velocity at 3,4,5 (should be wrapped for safety) - pBasePos[0] += dt * pBaseVel[0]; - pBasePos[1] += dt * pBaseVel[1]; - pBasePos[2] += dt * pBaseVel[2]; + // reset to current position + for (int i = 0; i < 3; ++i) + { + m_basePos_interpolate[i] = m_basePos[i]; + } + pBasePos = m_basePos_interpolate; + + pBasePos[0] += dt * pBaseVel[0]; + pBasePos[1] += dt * pBaseVel[1]; + pBasePos[2] += dt * pBaseVel[2]; + } /////////////////////////////// //local functor for quaternion integration (to avoid error prone redundancy) @@ -1617,26 +1661,29 @@ void btMultiBody::predictPositionsMultiDof(btScalar dt) //pQuatUpdateFun(getBaseOmega(), m_baseQuat, true, dt); // - btScalar *pBaseQuat; - - // reset to current orientation - for (int i = 0; i < 4; ++i) - { - m_baseQuat_interpolate[i] = m_baseQuat[i]; - } - pBaseQuat = m_baseQuat_interpolate; + if(!isBaseKinematic()) + { + btScalar *pBaseQuat; - btScalar *pBaseOmega = &m_realBuf[0]; //note: the !pqd case assumes m_realBuf starts with base omega (should be wrapped for safety) - // - btQuaternion baseQuat; - baseQuat.setValue(pBaseQuat[0], pBaseQuat[1], pBaseQuat[2], pBaseQuat[3]); - btVector3 baseOmega; - baseOmega.setValue(pBaseOmega[0], pBaseOmega[1], pBaseOmega[2]); - pQuatUpdateFun(baseOmega, baseQuat, true, dt); - pBaseQuat[0] = baseQuat.x(); - pBaseQuat[1] = baseQuat.y(); - pBaseQuat[2] = baseQuat.z(); - pBaseQuat[3] = baseQuat.w(); + // reset to current orientation + for (int i = 0; i < 4; ++i) + { + m_baseQuat_interpolate[i] = m_baseQuat[i]; + } + pBaseQuat = m_baseQuat_interpolate; + + btScalar *pBaseOmega = &m_realBuf[0]; //note: the !pqd case assumes m_realBuf starts with base omega (should be wrapped for safety) + // + btQuaternion baseQuat; + baseQuat.setValue(pBaseQuat[0], pBaseQuat[1], pBaseQuat[2], pBaseQuat[3]); + btVector3 baseOmega; + baseOmega.setValue(pBaseOmega[0], pBaseOmega[1], pBaseOmega[2]); + pQuatUpdateFun(baseOmega, baseQuat, true, dt); + pBaseQuat[0] = baseQuat.x(); + pBaseQuat[1] = baseQuat.y(); + pBaseQuat[2] = baseQuat.z(); + pBaseQuat[3] = baseQuat.w(); + } // Finally we can update m_jointPos for each of the m_links for (int i = 0; i < num_links; ++i) @@ -1644,55 +1691,88 @@ void btMultiBody::predictPositionsMultiDof(btScalar dt) btScalar *pJointPos; pJointPos = &m_links[i].m_jointPos_interpolate[0]; - btScalar *pJointVel = getJointVelMultiDof(i); - - switch (m_links[i].m_jointType) - { - case btMultibodyLink::ePrismatic: - case btMultibodyLink::eRevolute: - { - //reset to current pos - pJointPos[0] = m_links[i].m_jointPos[0]; - btScalar jointVel = pJointVel[0]; - pJointPos[0] += dt * jointVel; - break; - } - case btMultibodyLink::eSpherical: - { - //reset to current pos - - for (int j = 0; j < 4; ++j) + if (m_links[i].m_collider && m_links[i].m_collider->isStaticOrKinematic()) + { + switch (m_links[i].m_jointType) + { + case btMultibodyLink::ePrismatic: + case btMultibodyLink::eRevolute: { - pJointPos[j] = m_links[i].m_jointPos[j]; + pJointPos[0] = m_links[i].m_jointPos[0]; + break; } - - btVector3 jointVel; - jointVel.setValue(pJointVel[0], pJointVel[1], pJointVel[2]); - btQuaternion jointOri; - jointOri.setValue(pJointPos[0], pJointPos[1], pJointPos[2], pJointPos[3]); - pQuatUpdateFun(jointVel, jointOri, false, dt); - pJointPos[0] = jointOri.x(); - pJointPos[1] = jointOri.y(); - pJointPos[2] = jointOri.z(); - pJointPos[3] = jointOri.w(); - break; - } - case btMultibodyLink::ePlanar: - { - for (int j = 0; j < 3; ++j) + case btMultibodyLink::eSpherical: { - pJointPos[j] = m_links[i].m_jointPos[j]; + for (int j = 0; j < 4; ++j) + { + pJointPos[j] = m_links[i].m_jointPos[j]; + } + break; } - pJointPos[0] += dt * getJointVelMultiDof(i)[0]; - - btVector3 q0_coors_qd1qd2 = getJointVelMultiDof(i)[1] * m_links[i].getAxisBottom(1) + getJointVelMultiDof(i)[2] * m_links[i].getAxisBottom(2); - btVector3 no_q0_coors_qd1qd2 = quatRotate(btQuaternion(m_links[i].getAxisTop(0), pJointPos[0]), q0_coors_qd1qd2); - pJointPos[1] += m_links[i].getAxisBottom(1).dot(no_q0_coors_qd1qd2) * dt; - pJointPos[2] += m_links[i].getAxisBottom(2).dot(no_q0_coors_qd1qd2) * dt; - break; + case btMultibodyLink::ePlanar: + { + for (int j = 0; j < 3; ++j) + { + pJointPos[j] = m_links[i].m_jointPos[j]; + } + break; + } + default: + break; } - default: + } + else + { + btScalar *pJointVel = getJointVelMultiDof(i); + + switch (m_links[i].m_jointType) { + case btMultibodyLink::ePrismatic: + case btMultibodyLink::eRevolute: + { + //reset to current pos + pJointPos[0] = m_links[i].m_jointPos[0]; + btScalar jointVel = pJointVel[0]; + pJointPos[0] += dt * jointVel; + break; + } + case btMultibodyLink::eSpherical: + { + //reset to current pos + + for (int j = 0; j < 4; ++j) + { + pJointPos[j] = m_links[i].m_jointPos[j]; + } + + btVector3 jointVel; + jointVel.setValue(pJointVel[0], pJointVel[1], pJointVel[2]); + btQuaternion jointOri; + jointOri.setValue(pJointPos[0], pJointPos[1], pJointPos[2], pJointPos[3]); + pQuatUpdateFun(jointVel, jointOri, false, dt); + pJointPos[0] = jointOri.x(); + pJointPos[1] = jointOri.y(); + pJointPos[2] = jointOri.z(); + pJointPos[3] = jointOri.w(); + break; + } + case btMultibodyLink::ePlanar: + { + for (int j = 0; j < 3; ++j) + { + pJointPos[j] = m_links[i].m_jointPos[j]; + } + pJointPos[0] += dt * getJointVelMultiDof(i)[0]; + + btVector3 q0_coors_qd1qd2 = getJointVelMultiDof(i)[1] * m_links[i].getAxisBottom(1) + getJointVelMultiDof(i)[2] * m_links[i].getAxisBottom(2); + btVector3 no_q0_coors_qd1qd2 = quatRotate(btQuaternion(m_links[i].getAxisTop(0), pJointPos[0]), q0_coors_qd1qd2); + pJointPos[1] += m_links[i].getAxisBottom(1).dot(no_q0_coors_qd1qd2) * dt; + pJointPos[2] += m_links[i].getAxisBottom(2).dot(no_q0_coors_qd1qd2) * dt; + break; + } + default: + { + } } } @@ -1703,16 +1783,19 @@ void btMultiBody::predictPositionsMultiDof(btScalar dt) void btMultiBody::stepPositionsMultiDof(btScalar dt, btScalar *pq, btScalar *pqd) { int num_links = getNumLinks(); - // step position by adding dt * velocity - //btVector3 v = getBaseVel(); - //m_basePos += dt * v; - // - btScalar *pBasePos = (pq ? &pq[4] : m_basePos); - btScalar *pBaseVel = (pqd ? &pqd[3] : &m_realBuf[3]); //note: the !pqd case assumes m_realBuf holds with base velocity at 3,4,5 (should be wrapped for safety) - - pBasePos[0] += dt * pBaseVel[0]; - pBasePos[1] += dt * pBaseVel[1]; - pBasePos[2] += dt * pBaseVel[2]; + if(!isBaseKinematic()) + { + // step position by adding dt * velocity + //btVector3 v = getBaseVel(); + //m_basePos += dt * v; + // + btScalar *pBasePos = (pq ? &pq[4] : m_basePos); + btScalar *pBaseVel = (pqd ? &pqd[3] : &m_realBuf[3]); //note: the !pqd case assumes m_realBuf holds with base velocity at 3,4,5 (should be wrapped for safety) + + pBasePos[0] += dt * pBaseVel[0]; + pBasePos[1] += dt * pBaseVel[1]; + pBasePos[2] += dt * pBaseVel[2]; + } /////////////////////////////// //local functor for quaternion integration (to avoid error prone redundancy) @@ -1763,22 +1846,25 @@ void btMultiBody::stepPositionsMultiDof(btScalar dt, btScalar *pq, btScalar *pqd //pQuatUpdateFun(getBaseOmega(), m_baseQuat, true, dt); // - btScalar *pBaseQuat = pq ? pq : m_baseQuat; - btScalar *pBaseOmega = pqd ? pqd : &m_realBuf[0]; //note: the !pqd case assumes m_realBuf starts with base omega (should be wrapped for safety) - // - btQuaternion baseQuat; - baseQuat.setValue(pBaseQuat[0], pBaseQuat[1], pBaseQuat[2], pBaseQuat[3]); - btVector3 baseOmega; - baseOmega.setValue(pBaseOmega[0], pBaseOmega[1], pBaseOmega[2]); - pQuatUpdateFun(baseOmega, baseQuat, true, dt); - pBaseQuat[0] = baseQuat.x(); - pBaseQuat[1] = baseQuat.y(); - pBaseQuat[2] = baseQuat.z(); - pBaseQuat[3] = baseQuat.w(); - - //printf("pBaseOmega = %.4f %.4f %.4f\n", pBaseOmega->x(), pBaseOmega->y(), pBaseOmega->z()); - //printf("pBaseVel = %.4f %.4f %.4f\n", pBaseVel->x(), pBaseVel->y(), pBaseVel->z()); - //printf("baseQuat = %.4f %.4f %.4f %.4f\n", pBaseQuat->x(), pBaseQuat->y(), pBaseQuat->z(), pBaseQuat->w()); + if(!isBaseKinematic()) + { + btScalar *pBaseQuat = pq ? pq : m_baseQuat; + btScalar *pBaseOmega = pqd ? pqd : &m_realBuf[0]; //note: the !pqd case assumes m_realBuf starts with base omega (should be wrapped for safety) + // + btQuaternion baseQuat; + baseQuat.setValue(pBaseQuat[0], pBaseQuat[1], pBaseQuat[2], pBaseQuat[3]); + btVector3 baseOmega; + baseOmega.setValue(pBaseOmega[0], pBaseOmega[1], pBaseOmega[2]); + pQuatUpdateFun(baseOmega, baseQuat, true, dt); + pBaseQuat[0] = baseQuat.x(); + pBaseQuat[1] = baseQuat.y(); + pBaseQuat[2] = baseQuat.z(); + pBaseQuat[3] = baseQuat.w(); + + //printf("pBaseOmega = %.4f %.4f %.4f\n", pBaseOmega->x(), pBaseOmega->y(), pBaseOmega->z()); + //printf("pBaseVel = %.4f %.4f %.4f\n", pBaseVel->x(), pBaseVel->y(), pBaseVel->z()); + //printf("baseQuat = %.4f %.4f %.4f %.4f\n", pBaseQuat->x(), pBaseQuat->y(), pBaseQuat->z(), pBaseQuat->w()); + } if (pq) pq += 7; @@ -1788,48 +1874,51 @@ void btMultiBody::stepPositionsMultiDof(btScalar dt, btScalar *pq, btScalar *pqd // Finally we can update m_jointPos for each of the m_links for (int i = 0; i < num_links; ++i) { - btScalar *pJointPos; - pJointPos= (pq ? pq : &m_links[i].m_jointPos[0]); - - btScalar *pJointVel = (pqd ? pqd : getJointVelMultiDof(i)); - - switch (m_links[i].m_jointType) + if (!(m_links[i].m_collider && m_links[i].m_collider->isStaticOrKinematic())) { - case btMultibodyLink::ePrismatic: - case btMultibodyLink::eRevolute: - { - //reset to current pos - btScalar jointVel = pJointVel[0]; - pJointPos[0] += dt * jointVel; - break; - } - case btMultibodyLink::eSpherical: - { - //reset to current pos - btVector3 jointVel; - jointVel.setValue(pJointVel[0], pJointVel[1], pJointVel[2]); - btQuaternion jointOri; - jointOri.setValue(pJointPos[0], pJointPos[1], pJointPos[2], pJointPos[3]); - pQuatUpdateFun(jointVel, jointOri, false, dt); - pJointPos[0] = jointOri.x(); - pJointPos[1] = jointOri.y(); - pJointPos[2] = jointOri.z(); - pJointPos[3] = jointOri.w(); - break; - } - case btMultibodyLink::ePlanar: + btScalar *pJointPos; + pJointPos= (pq ? pq : &m_links[i].m_jointPos[0]); + + btScalar *pJointVel = (pqd ? pqd : getJointVelMultiDof(i)); + + switch (m_links[i].m_jointType) { - pJointPos[0] += dt * getJointVelMultiDof(i)[0]; + case btMultibodyLink::ePrismatic: + case btMultibodyLink::eRevolute: + { + //reset to current pos + btScalar jointVel = pJointVel[0]; + pJointPos[0] += dt * jointVel; + break; + } + case btMultibodyLink::eSpherical: + { + //reset to current pos + btVector3 jointVel; + jointVel.setValue(pJointVel[0], pJointVel[1], pJointVel[2]); + btQuaternion jointOri; + jointOri.setValue(pJointPos[0], pJointPos[1], pJointPos[2], pJointPos[3]); + pQuatUpdateFun(jointVel, jointOri, false, dt); + pJointPos[0] = jointOri.x(); + pJointPos[1] = jointOri.y(); + pJointPos[2] = jointOri.z(); + pJointPos[3] = jointOri.w(); + break; + } + case btMultibodyLink::ePlanar: + { + pJointPos[0] += dt * getJointVelMultiDof(i)[0]; - btVector3 q0_coors_qd1qd2 = getJointVelMultiDof(i)[1] * m_links[i].getAxisBottom(1) + getJointVelMultiDof(i)[2] * m_links[i].getAxisBottom(2); - btVector3 no_q0_coors_qd1qd2 = quatRotate(btQuaternion(m_links[i].getAxisTop(0), pJointPos[0]), q0_coors_qd1qd2); - pJointPos[1] += m_links[i].getAxisBottom(1).dot(no_q0_coors_qd1qd2) * dt; - pJointPos[2] += m_links[i].getAxisBottom(2).dot(no_q0_coors_qd1qd2) * dt; + btVector3 q0_coors_qd1qd2 = getJointVelMultiDof(i)[1] * m_links[i].getAxisBottom(1) + getJointVelMultiDof(i)[2] * m_links[i].getAxisBottom(2); + btVector3 no_q0_coors_qd1qd2 = quatRotate(btQuaternion(m_links[i].getAxisTop(0), pJointPos[0]), q0_coors_qd1qd2); + pJointPos[1] += m_links[i].getAxisBottom(1).dot(no_q0_coors_qd1qd2) * dt; + pJointPos[2] += m_links[i].getAxisBottom(2).dot(no_q0_coors_qd1qd2) * dt; - break; - } - default: - { + break; + } + default: + { + } } } @@ -2135,8 +2224,15 @@ void btMultiBody::updateCollisionObjectInterpolationWorldTransforms(btAlignedObj world_to_local.resize(getNumLinks() + 1); local_origin.resize(getNumLinks() + 1); - world_to_local[0] = getInterpolateWorldToBaseRot(); - local_origin[0] = getInterpolateBasePos(); + if(isBaseKinematic()){ + world_to_local[0] = getWorldToBaseRot(); + local_origin[0] = getBasePos(); + } + else + { + world_to_local[0] = getInterpolateWorldToBaseRot(); + local_origin[0] = getInterpolateBasePos(); + } if (getBaseCollider()) { @@ -2282,3 +2378,81 @@ const char *btMultiBody::serialize(void *dataBuffer, class btSerializer *seriali return btMultiBodyDataName; } + +void btMultiBody::saveKinematicState(btScalar timeStep) +{ + //todo: clamp to some (user definable) safe minimum timestep, to limit maximum angular/linear velocities + if (m_kinematic_calculate_velocity && timeStep != btScalar(0.)) + { + btVector3 linearVelocity, angularVelocity; + btTransformUtil::calculateVelocity(getInterpolateBaseWorldTransform(), getBaseWorldTransform(), timeStep, linearVelocity, angularVelocity); + setBaseVel(linearVelocity); + setBaseOmega(angularVelocity); + setInterpolateBaseWorldTransform(getBaseWorldTransform()); + } +} + +void btMultiBody::setLinkDynamicType(const int i, int type) +{ + if (i == -1) + { + setBaseDynamicType(type); + } + else if (i >= 0 && i < getNumLinks()) + { + if (m_links[i].m_collider) + { + m_links[i].m_collider->setDynamicType(type); + } + } +} + +bool btMultiBody::isLinkStaticOrKinematic(const int i) const +{ + if (i == -1) + { + return isBaseStaticOrKinematic(); + } + else + { + if (m_links[i].m_collider) + return m_links[i].m_collider->isStaticOrKinematic(); + } + return false; +} + +bool btMultiBody::isLinkKinematic(const int i) const +{ + if (i == -1) + { + return isBaseKinematic(); + } + else + { + if (m_links[i].m_collider) + return m_links[i].m_collider->isKinematic(); + } + return false; +} + +bool btMultiBody::isLinkAndAllAncestorsStaticOrKinematic(const int i) const +{ + int link = i; + while (link != -1) { + if (!isLinkStaticOrKinematic(link)) + return false; + link = m_links[link].m_parent; + } + return isBaseStaticOrKinematic(); +} + +bool btMultiBody::isLinkAndAllAncestorsKinematic(const int i) const +{ + int link = i; + while (link != -1) { + if (!isLinkKinematic(link)) + return false; + link = m_links[link].m_parent; + } + return isBaseKinematic(); +} diff --git a/thirdparty/bullet/BulletDynamics/Featherstone/btMultiBody.h b/thirdparty/bullet/BulletDynamics/Featherstone/btMultiBody.h index be795633fd..5a3efc9414 100644 --- a/thirdparty/bullet/BulletDynamics/Featherstone/btMultiBody.h +++ b/thirdparty/bullet/BulletDynamics/Featherstone/btMultiBody.h @@ -210,7 +210,13 @@ public: void setBasePos(const btVector3 &pos) { m_basePos = pos; - m_basePos_interpolate = pos; + if(!isBaseKinematic()) + m_basePos_interpolate = pos; + } + + void setInterpolateBasePos(const btVector3 &pos) + { + m_basePos_interpolate = pos; } void setBaseWorldTransform(const btTransform &tr) @@ -227,17 +233,39 @@ public: return tr; } + void setInterpolateBaseWorldTransform(const btTransform &tr) + { + setInterpolateBasePos(tr.getOrigin()); + setInterpolateWorldToBaseRot(tr.getRotation().inverse()); + } + + btTransform getInterpolateBaseWorldTransform() const + { + btTransform tr; + tr.setOrigin(getInterpolateBasePos()); + tr.setRotation(getInterpolateWorldToBaseRot().inverse()); + return tr; + } + void setBaseVel(const btVector3 &vel) { m_realBuf[3] = vel[0]; m_realBuf[4] = vel[1]; m_realBuf[5] = vel[2]; } + void setWorldToBaseRot(const btQuaternion &rot) { m_baseQuat = rot; //m_baseQuat asumed to ba alias!? - m_baseQuat_interpolate = rot; + if(!isBaseKinematic()) + m_baseQuat_interpolate = rot; } + + void setInterpolateWorldToBaseRot(const btQuaternion &rot) + { + m_baseQuat_interpolate = rot; + } + void setBaseOmega(const btVector3 &omega) { m_realBuf[0] = omega[0]; @@ -245,6 +273,8 @@ public: m_realBuf[2] = omega[2]; } + void saveKinematicState(btScalar timeStep); + // // get/set pos/vel for child m_links (i = 0 to num_links-1) // @@ -278,6 +308,11 @@ public: { return &m_deltaV[0]; } + + const btScalar *getSplitVelocityVector() const + { + return &m_splitV[0]; + } /* btScalar * getVelocityVector() { return &real_buf[0]; @@ -397,6 +432,26 @@ public: m_deltaV[dof] += delta_vee[dof] * multiplier; } } + void applyDeltaSplitVeeMultiDof(const btScalar *delta_vee, btScalar multiplier) + { + for (int dof = 0; dof < 6 + getNumDofs(); ++dof) + { + m_splitV[dof] += delta_vee[dof] * multiplier; + } + } + void addSplitV() + { + applyDeltaVeeMultiDof(&m_splitV[0], 1); + } + void substractSplitV() + { + applyDeltaVeeMultiDof(&m_splitV[0], -1); + + for (int dof = 0; dof < 6 + getNumDofs(); ++dof) + { + m_splitV[dof] = 0.f; + } + } void processDeltaVeeMultiDof2() { applyDeltaVeeMultiDof(&m_deltaV[0], 1); @@ -495,14 +550,22 @@ public: void goToSleep(); void checkMotionAndSleepIfRequired(btScalar timestep); - bool hasFixedBase() const - { - return m_fixedBase; - } + bool hasFixedBase() const; + + bool isBaseKinematic() const; + + bool isBaseStaticOrKinematic() const; + + // set the dynamic type in the base's collision flags. + void setBaseDynamicType(int dynamicType); void setFixedBase(bool fixedBase) { m_fixedBase = fixedBase; + if(m_fixedBase) + setBaseDynamicType(btCollisionObject::CF_STATIC_OBJECT); + else + setBaseDynamicType(btCollisionObject::CF_DYNAMIC_OBJECT); } int getCompanionId() const @@ -653,7 +716,15 @@ public: btVector3 &top_out, // top part of output vector btVector3 &bottom_out); // bottom part of output vector + void setLinkDynamicType(const int i, int type); + bool isLinkStaticOrKinematic(const int i) const; + + bool isLinkKinematic(const int i) const; + + bool isLinkAndAllAncestorsStaticOrKinematic(const int i) const; + + bool isLinkAndAllAncestorsKinematic(const int i) const; private: btMultiBody(const btMultiBody &); // not implemented @@ -711,6 +782,7 @@ private: // offset size array // 0 num_links+1 rot_from_parent // + btAlignedObjectArray<btScalar> m_splitV; btAlignedObjectArray<btScalar> m_deltaV; btAlignedObjectArray<btScalar> m_realBuf; btAlignedObjectArray<btVector3> m_vectorBuf; @@ -751,6 +823,9 @@ private: ///the m_needsJointFeedback gets updated/computed during the stepVelocitiesMultiDof and it for internal usage only bool m_internalNeedsJointFeedback; + + //If enabled, calculate the velocity based on kinematic transform changes. Currently only implemented for the base. + bool m_kinematic_calculate_velocity; }; struct btMultiBodyLinkDoubleData diff --git a/thirdparty/bullet/BulletDynamics/Featherstone/btMultiBodyConstraint.cpp b/thirdparty/bullet/BulletDynamics/Featherstone/btMultiBodyConstraint.cpp index d7ed05ce57..1ba5861145 100644 --- a/thirdparty/bullet/BulletDynamics/Featherstone/btMultiBodyConstraint.cpp +++ b/thirdparty/bullet/BulletDynamics/Featherstone/btMultiBodyConstraint.cpp @@ -2,11 +2,12 @@ #include "BulletDynamics/Dynamics/btRigidBody.h" #include "btMultiBodyPoint2Point.h" //for testing (BTMBP2PCONSTRAINT_BLOCK_ANGULAR_MOTION_TEST macro) -btMultiBodyConstraint::btMultiBodyConstraint(btMultiBody* bodyA, btMultiBody* bodyB, int linkA, int linkB, int numRows, bool isUnilateral) +btMultiBodyConstraint::btMultiBodyConstraint(btMultiBody* bodyA, btMultiBody* bodyB, int linkA, int linkB, int numRows, bool isUnilateral, int type) : m_bodyA(bodyA), m_bodyB(bodyB), m_linkA(linkA), m_linkB(linkB), + m_type(type), m_numRows(numRows), m_jacSizeA(0), m_jacSizeBoth(0), diff --git a/thirdparty/bullet/BulletDynamics/Featherstone/btMultiBodyConstraint.h b/thirdparty/bullet/BulletDynamics/Featherstone/btMultiBodyConstraint.h index 5c15f3e851..4a6007ee3e 100644 --- a/thirdparty/bullet/BulletDynamics/Featherstone/btMultiBodyConstraint.h +++ b/thirdparty/bullet/BulletDynamics/Featherstone/btMultiBodyConstraint.h @@ -20,6 +20,21 @@ subject to the following restrictions: #include "LinearMath/btAlignedObjectArray.h" #include "btMultiBody.h" + +//Don't change any of the existing enum values, so add enum types at the end for serialization compatibility +enum btTypedMultiBodyConstraintType +{ + MULTIBODY_CONSTRAINT_LIMIT=3, + MULTIBODY_CONSTRAINT_1DOF_JOINT_MOTOR, + MULTIBODY_CONSTRAINT_GEAR, + MULTIBODY_CONSTRAINT_POINT_TO_POINT, + MULTIBODY_CONSTRAINT_SLIDER, + MULTIBODY_CONSTRAINT_SPHERICAL_MOTOR, + MULTIBODY_CONSTRAINT_FIXED, + + MAX_MULTIBODY_CONSTRAINT_TYPE, +}; + class btMultiBody; struct btSolverInfo; @@ -46,6 +61,8 @@ protected: int m_linkA; int m_linkB; + int m_type; //btTypedMultiBodyConstraintType + int m_numRows; int m_jacSizeA; int m_jacSizeBoth; @@ -82,12 +99,16 @@ protected: public: BT_DECLARE_ALIGNED_ALLOCATOR(); - btMultiBodyConstraint(btMultiBody * bodyA, btMultiBody * bodyB, int linkA, int linkB, int numRows, bool isUnilateral); + btMultiBodyConstraint(btMultiBody * bodyA, btMultiBody * bodyB, int linkA, int linkB, int numRows, bool isUnilateral, int type); virtual ~btMultiBodyConstraint(); void updateJacobianSizes(); void allocateJacobiansMultiDof(); + int getConstraintType() const + { + return m_type; + } //many constraints have setFrameInB/setPivotInB. Will use 'getConstraintType' later. virtual void setFrameInB(const btMatrix3x3& frameInB) {} virtual void setPivotInB(const btVector3& pivotInB) {} diff --git a/thirdparty/bullet/BulletDynamics/Featherstone/btMultiBodyDynamicsWorld.cpp b/thirdparty/bullet/BulletDynamics/Featherstone/btMultiBodyDynamicsWorld.cpp index cd1bad089e..fef95f0c4e 100644 --- a/thirdparty/bullet/BulletDynamics/Featherstone/btMultiBodyDynamicsWorld.cpp +++ b/thirdparty/bullet/BulletDynamics/Featherstone/btMultiBodyDynamicsWorld.cpp @@ -592,6 +592,7 @@ void btMultiBodyDynamicsWorld::integrateMultiBodyTransforms(btScalar timeStep) if (!isSleeping) { + bod->addSplitV(); int nLinks = bod->getNumLinks(); ///base + num m_links @@ -610,6 +611,7 @@ void btMultiBodyDynamicsWorld::integrateMultiBodyTransforms(btScalar timeStep) m_scratch_world_to_local.resize(nLinks + 1); m_scratch_local_origin.resize(nLinks + 1); bod->updateCollisionObjectWorldTransforms(m_scratch_world_to_local, m_scratch_local_origin); + bod->substractSplitV(); } else { @@ -867,6 +869,18 @@ void btMultiBodyDynamicsWorld::serializeMultiBodies(btSerializer* serializer) } } } + +void btMultiBodyDynamicsWorld::saveKinematicState(btScalar timeStep) +{ + btDiscreteDynamicsWorld::saveKinematicState(timeStep); + for(int i = 0; i < m_multiBodies.size(); i++) + { + btMultiBody* body = m_multiBodies[i]; + if(body->isBaseKinematic()) + body->saveKinematicState(timeStep); + } +} + // //void btMultiBodyDynamicsWorld::setSplitIslands(bool split) //{ diff --git a/thirdparty/bullet/BulletDynamics/Featherstone/btMultiBodyDynamicsWorld.h b/thirdparty/bullet/BulletDynamics/Featherstone/btMultiBodyDynamicsWorld.h index 9ac46f4b64..d2d76c8b92 100644 --- a/thirdparty/bullet/BulletDynamics/Featherstone/btMultiBodyDynamicsWorld.h +++ b/thirdparty/bullet/BulletDynamics/Featherstone/btMultiBodyDynamicsWorld.h @@ -120,5 +120,7 @@ public: virtual void solveExternalForces(btContactSolverInfo& solverInfo); virtual void solveInternalConstraints(btContactSolverInfo& solverInfo); void buildIslands(); + + virtual void saveKinematicState(btScalar timeStep); }; #endif //BT_MULTIBODY_DYNAMICS_WORLD_H diff --git a/thirdparty/bullet/BulletDynamics/Featherstone/btMultiBodyFixedConstraint.cpp b/thirdparty/bullet/BulletDynamics/Featherstone/btMultiBodyFixedConstraint.cpp index 5ef9444c2f..df2abbe97a 100644 --- a/thirdparty/bullet/BulletDynamics/Featherstone/btMultiBodyFixedConstraint.cpp +++ b/thirdparty/bullet/BulletDynamics/Featherstone/btMultiBodyFixedConstraint.cpp @@ -24,7 +24,7 @@ subject to the following restrictions: #define BTMBFIXEDCONSTRAINT_DIM 6 btMultiBodyFixedConstraint::btMultiBodyFixedConstraint(btMultiBody* body, int link, btRigidBody* bodyB, const btVector3& pivotInA, const btVector3& pivotInB, const btMatrix3x3& frameInA, const btMatrix3x3& frameInB) - : btMultiBodyConstraint(body, 0, link, -1, BTMBFIXEDCONSTRAINT_DIM, false), + : btMultiBodyConstraint(body, 0, link, -1, BTMBFIXEDCONSTRAINT_DIM, false, MULTIBODY_CONSTRAINT_FIXED), m_rigidBodyA(0), m_rigidBodyB(bodyB), m_pivotInA(pivotInA), @@ -36,7 +36,7 @@ btMultiBodyFixedConstraint::btMultiBodyFixedConstraint(btMultiBody* body, int li } btMultiBodyFixedConstraint::btMultiBodyFixedConstraint(btMultiBody* bodyA, int linkA, btMultiBody* bodyB, int linkB, const btVector3& pivotInA, const btVector3& pivotInB, const btMatrix3x3& frameInA, const btMatrix3x3& frameInB) - : btMultiBodyConstraint(bodyA, bodyB, linkA, linkB, BTMBFIXEDCONSTRAINT_DIM, false), + : btMultiBodyConstraint(bodyA, bodyB, linkA, linkB, BTMBFIXEDCONSTRAINT_DIM, false, MULTIBODY_CONSTRAINT_FIXED), m_rigidBodyA(0), m_rigidBodyB(0), m_pivotInA(pivotInA), diff --git a/thirdparty/bullet/BulletDynamics/Featherstone/btMultiBodyGearConstraint.cpp b/thirdparty/bullet/BulletDynamics/Featherstone/btMultiBodyGearConstraint.cpp index bf6b811d26..ee02cf9b07 100644 --- a/thirdparty/bullet/BulletDynamics/Featherstone/btMultiBodyGearConstraint.cpp +++ b/thirdparty/bullet/BulletDynamics/Featherstone/btMultiBodyGearConstraint.cpp @@ -21,7 +21,7 @@ subject to the following restrictions: #include "BulletCollision/CollisionDispatch/btCollisionObject.h" btMultiBodyGearConstraint::btMultiBodyGearConstraint(btMultiBody* bodyA, int linkA, btMultiBody* bodyB, int linkB, const btVector3& pivotInA, const btVector3& pivotInB, const btMatrix3x3& frameInA, const btMatrix3x3& frameInB) - : btMultiBodyConstraint(bodyA, bodyB, linkA, linkB, 1, false), + : btMultiBodyConstraint(bodyA, bodyB, linkA, linkB, 1, false, MULTIBODY_CONSTRAINT_GEAR), m_gearRatio(1), m_gearAuxLink(-1), m_erp(0), diff --git a/thirdparty/bullet/BulletDynamics/Featherstone/btMultiBodyJointLimitConstraint.cpp b/thirdparty/bullet/BulletDynamics/Featherstone/btMultiBodyJointLimitConstraint.cpp index 8791ad2868..94b36ac108 100644 --- a/thirdparty/bullet/BulletDynamics/Featherstone/btMultiBodyJointLimitConstraint.cpp +++ b/thirdparty/bullet/BulletDynamics/Featherstone/btMultiBodyJointLimitConstraint.cpp @@ -22,7 +22,7 @@ subject to the following restrictions: btMultiBodyJointLimitConstraint::btMultiBodyJointLimitConstraint(btMultiBody* body, int link, btScalar lower, btScalar upper) //:btMultiBodyConstraint(body,0,link,-1,2,true), - : btMultiBodyConstraint(body, body, link, body->getLink(link).m_parent, 2, true), + : btMultiBodyConstraint(body, body, link, body->getLink(link).m_parent, 2, true, MULTIBODY_CONSTRAINT_LIMIT), m_lowerBound(lower), m_upperBound(upper) { diff --git a/thirdparty/bullet/BulletDynamics/Featherstone/btMultiBodyJointLimitConstraint.h b/thirdparty/bullet/BulletDynamics/Featherstone/btMultiBodyJointLimitConstraint.h index 6716ba490f..b810692b4c 100644 --- a/thirdparty/bullet/BulletDynamics/Featherstone/btMultiBodyJointLimitConstraint.h +++ b/thirdparty/bullet/BulletDynamics/Featherstone/btMultiBodyJointLimitConstraint.h @@ -42,6 +42,22 @@ public: { //todo(erwincoumans) } + btScalar getLowerBound() const + { + return m_lowerBound; + } + btScalar getUpperBound() const + { + return m_upperBound; + } + void setLowerBound(btScalar lower) + { + m_lowerBound = lower; + } + void setUpperBound(btScalar upper) + { + m_upperBound = upper; + } }; #endif //BT_MULTIBODY_JOINT_LIMIT_CONSTRAINT_H diff --git a/thirdparty/bullet/BulletDynamics/Featherstone/btMultiBodyJointMotor.cpp b/thirdparty/bullet/BulletDynamics/Featherstone/btMultiBodyJointMotor.cpp index 5c816c4987..fec9b03213 100644 --- a/thirdparty/bullet/BulletDynamics/Featherstone/btMultiBodyJointMotor.cpp +++ b/thirdparty/bullet/BulletDynamics/Featherstone/btMultiBodyJointMotor.cpp @@ -21,7 +21,7 @@ subject to the following restrictions: #include "BulletCollision/CollisionDispatch/btCollisionObject.h" btMultiBodyJointMotor::btMultiBodyJointMotor(btMultiBody* body, int link, btScalar desiredVelocity, btScalar maxMotorImpulse) - : btMultiBodyConstraint(body, body, link, body->getLink(link).m_parent, 1, true), + : btMultiBodyConstraint(body, body, link, body->getLink(link).m_parent, 1, true, MULTIBODY_CONSTRAINT_1DOF_JOINT_MOTOR), m_desiredVelocity(desiredVelocity), m_desiredPosition(0), m_kd(1.), @@ -51,7 +51,7 @@ void btMultiBodyJointMotor::finalizeMultiDof() btMultiBodyJointMotor::btMultiBodyJointMotor(btMultiBody* body, int link, int linkDoF, btScalar desiredVelocity, btScalar maxMotorImpulse) //:btMultiBodyConstraint(body,0,link,-1,1,true), - : btMultiBodyConstraint(body, body, link, body->getLink(link).m_parent, 1, true), + : btMultiBodyConstraint(body, body, link, body->getLink(link).m_parent, 1, true, MULTIBODY_CONSTRAINT_1DOF_JOINT_MOTOR), m_desiredVelocity(desiredVelocity), m_desiredPosition(0), m_kd(1.), diff --git a/thirdparty/bullet/BulletDynamics/Featherstone/btMultiBodyLink.h b/thirdparty/bullet/BulletDynamics/Featherstone/btMultiBodyLink.h index 01d5583c2f..5a1429340f 100644 --- a/thirdparty/bullet/BulletDynamics/Featherstone/btMultiBodyLink.h +++ b/thirdparty/bullet/BulletDynamics/Featherstone/btMultiBodyLink.h @@ -295,6 +295,9 @@ struct btMultibodyLink } } } + + + }; #endif //BT_MULTIBODY_LINK_H diff --git a/thirdparty/bullet/BulletDynamics/Featherstone/btMultiBodyLinkCollider.h b/thirdparty/bullet/BulletDynamics/Featherstone/btMultiBodyLinkCollider.h index bc909990c2..3dc35a5814 100644 --- a/thirdparty/bullet/BulletDynamics/Featherstone/btMultiBodyLinkCollider.h +++ b/thirdparty/bullet/BulletDynamics/Featherstone/btMultiBodyLinkCollider.h @@ -130,6 +130,23 @@ public: return true; } + bool isStaticOrKinematic() const + { + return isStaticOrKinematicObject(); + } + + bool isKinematic() const + { + return isKinematicObject(); + } + + void setDynamicType(int dynamicType) + { + int oldFlags = getCollisionFlags(); + oldFlags &= ~(btCollisionObject::CF_STATIC_OBJECT | btCollisionObject::CF_KINEMATIC_OBJECT); + setCollisionFlags(oldFlags | dynamicType); + } + virtual int calculateSerializeBufferSize() const; ///fills the dataBuffer and returns the struct name (and 0 on failure) diff --git a/thirdparty/bullet/BulletDynamics/Featherstone/btMultiBodyPoint2Point.cpp b/thirdparty/bullet/BulletDynamics/Featherstone/btMultiBodyPoint2Point.cpp index 37d3aede37..f51e69deb1 100644 --- a/thirdparty/bullet/BulletDynamics/Featherstone/btMultiBodyPoint2Point.cpp +++ b/thirdparty/bullet/BulletDynamics/Featherstone/btMultiBodyPoint2Point.cpp @@ -27,7 +27,7 @@ subject to the following restrictions: #endif btMultiBodyPoint2Point::btMultiBodyPoint2Point(btMultiBody* body, int link, btRigidBody* bodyB, const btVector3& pivotInA, const btVector3& pivotInB) - : btMultiBodyConstraint(body, 0, link, -1, BTMBP2PCONSTRAINT_DIM, false), + : btMultiBodyConstraint(body, 0, link, -1, BTMBP2PCONSTRAINT_DIM, false, MULTIBODY_CONSTRAINT_POINT_TO_POINT), m_rigidBodyA(0), m_rigidBodyB(bodyB), m_pivotInA(pivotInA), @@ -37,7 +37,7 @@ btMultiBodyPoint2Point::btMultiBodyPoint2Point(btMultiBody* body, int link, btRi } btMultiBodyPoint2Point::btMultiBodyPoint2Point(btMultiBody* bodyA, int linkA, btMultiBody* bodyB, int linkB, const btVector3& pivotInA, const btVector3& pivotInB) - : btMultiBodyConstraint(bodyA, bodyB, linkA, linkB, BTMBP2PCONSTRAINT_DIM, false), + : btMultiBodyConstraint(bodyA, bodyB, linkA, linkB, BTMBP2PCONSTRAINT_DIM, false, MULTIBODY_CONSTRAINT_POINT_TO_POINT), m_rigidBodyA(0), m_rigidBodyB(0), m_pivotInA(pivotInA), diff --git a/thirdparty/bullet/BulletDynamics/Featherstone/btMultiBodySliderConstraint.cpp b/thirdparty/bullet/BulletDynamics/Featherstone/btMultiBodySliderConstraint.cpp index e025302ce6..48ec1d5af2 100644 --- a/thirdparty/bullet/BulletDynamics/Featherstone/btMultiBodySliderConstraint.cpp +++ b/thirdparty/bullet/BulletDynamics/Featherstone/btMultiBodySliderConstraint.cpp @@ -25,7 +25,7 @@ subject to the following restrictions: #define EPSILON 0.000001 btMultiBodySliderConstraint::btMultiBodySliderConstraint(btMultiBody* body, int link, btRigidBody* bodyB, const btVector3& pivotInA, const btVector3& pivotInB, const btMatrix3x3& frameInA, const btMatrix3x3& frameInB, const btVector3& jointAxis) - : btMultiBodyConstraint(body, 0, link, -1, BTMBSLIDERCONSTRAINT_DIM, false), + : btMultiBodyConstraint(body, 0, link, -1, BTMBSLIDERCONSTRAINT_DIM, false, MULTIBODY_CONSTRAINT_SLIDER), m_rigidBodyA(0), m_rigidBodyB(bodyB), m_pivotInA(pivotInA), @@ -38,7 +38,7 @@ btMultiBodySliderConstraint::btMultiBodySliderConstraint(btMultiBody* body, int } btMultiBodySliderConstraint::btMultiBodySliderConstraint(btMultiBody* bodyA, int linkA, btMultiBody* bodyB, int linkB, const btVector3& pivotInA, const btVector3& pivotInB, const btMatrix3x3& frameInA, const btMatrix3x3& frameInB, const btVector3& jointAxis) - : btMultiBodyConstraint(bodyA, bodyB, linkA, linkB, BTMBSLIDERCONSTRAINT_DIM, false), + : btMultiBodyConstraint(bodyA, bodyB, linkA, linkB, BTMBSLIDERCONSTRAINT_DIM, false, MULTIBODY_CONSTRAINT_SLIDER), m_rigidBodyA(0), m_rigidBodyB(0), m_pivotInA(pivotInA), diff --git a/thirdparty/bullet/BulletDynamics/Featherstone/btMultiBodySphericalJointMotor.cpp b/thirdparty/bullet/BulletDynamics/Featherstone/btMultiBodySphericalJointMotor.cpp index 3e5aa30f28..25ddd539bf 100644 --- a/thirdparty/bullet/BulletDynamics/Featherstone/btMultiBodySphericalJointMotor.cpp +++ b/thirdparty/bullet/BulletDynamics/Featherstone/btMultiBodySphericalJointMotor.cpp @@ -23,7 +23,7 @@ subject to the following restrictions: #include "BulletDynamics/ConstraintSolver/btGeneric6DofSpring2Constraint.h" btMultiBodySphericalJointMotor::btMultiBodySphericalJointMotor(btMultiBody* body, int link, btScalar maxMotorImpulse) - : btMultiBodyConstraint(body, body, link, body->getLink(link).m_parent, 3, true), + : btMultiBodyConstraint(body, body, link, body->getLink(link).m_parent, 3, true, MULTIBODY_CONSTRAINT_SPHERICAL_MOTOR), m_desiredVelocity(0, 0, 0), m_desiredPosition(0,0,0,1), m_kd(1.), diff --git a/thirdparty/bullet/BulletSoftBody/DeformableBodyInplaceSolverIslandCallback.h b/thirdparty/bullet/BulletSoftBody/DeformableBodyInplaceSolverIslandCallback.h index 7b225701f6..01c7e93a1b 100644 --- a/thirdparty/bullet/BulletSoftBody/DeformableBodyInplaceSolverIslandCallback.h +++ b/thirdparty/bullet/BulletSoftBody/DeformableBodyInplaceSolverIslandCallback.h @@ -13,13 +13,12 @@ struct DeformableBodyInplaceSolverIslandCallback : public MultiBodyInplaceSolver btDeformableMultiBodyConstraintSolver* m_deformableSolver; DeformableBodyInplaceSolverIslandCallback(btDeformableMultiBodyConstraintSolver* solver, - btDispatcher* dispatcher) - : MultiBodyInplaceSolverIslandCallback(solver, dispatcher), m_deformableSolver(solver) + btDispatcher* dispatcher) + : MultiBodyInplaceSolverIslandCallback(solver, dispatcher), m_deformableSolver(solver) { } - - virtual void processConstraints(int islandId=-1) + virtual void processConstraints(int islandId = -1) { btCollisionObject** bodies = m_bodies.size() ? &m_bodies[0] : 0; btCollisionObject** softBodies = m_softBodies.size() ? &m_softBodies[0] : 0; @@ -30,7 +29,7 @@ struct DeformableBodyInplaceSolverIslandCallback : public MultiBodyInplaceSolver //printf("mb contacts = %d, mb constraints = %d\n", mbContacts, m_multiBodyConstraints.size()); m_deformableSolver->solveDeformableBodyGroup(bodies, m_bodies.size(), softBodies, m_softBodies.size(), manifold, m_manifolds.size(), constraints, m_constraints.size(), multiBodyConstraints, m_multiBodyConstraints.size(), *m_solverInfo, m_debugDrawer, m_dispatcher); - if (m_bodies.size() && (m_solverInfo->m_reportSolverAnalytics&1)) + if (m_bodies.size() && (m_solverInfo->m_reportSolverAnalytics & 1)) { m_deformableSolver->m_analyticsData.m_islandId = islandId; m_islandAnalyticsData.push_back(m_solver->m_analyticsData); diff --git a/thirdparty/bullet/BulletSoftBody/btCGProjection.h b/thirdparty/bullet/BulletSoftBody/btCGProjection.h index d047e6d3d9..e05970664c 100644 --- a/thirdparty/bullet/BulletSoftBody/btCGProjection.h +++ b/thirdparty/bullet/BulletSoftBody/btCGProjection.h @@ -22,85 +22,83 @@ struct DeformableContactConstraint { - const btSoftBody::Node* m_node; - btAlignedObjectArray<const btSoftBody::RContact*> m_contact; - btAlignedObjectArray<btVector3> m_total_normal_dv; - btAlignedObjectArray<btVector3> m_total_tangent_dv; - btAlignedObjectArray<bool> m_static; - btAlignedObjectArray<bool> m_can_be_dynamic; - - DeformableContactConstraint(const btSoftBody::RContact& rcontact): m_node(rcontact.m_node) - { - append(rcontact); - } - - DeformableContactConstraint(): m_node(NULL) - { - m_contact.push_back(NULL); - } - - void append(const btSoftBody::RContact& rcontact) - { - m_contact.push_back(&rcontact); - m_total_normal_dv.push_back(btVector3(0,0,0)); - m_total_tangent_dv.push_back(btVector3(0,0,0)); - m_static.push_back(false); - m_can_be_dynamic.push_back(true); - } - - void replace(const btSoftBody::RContact& rcontact) - { - m_contact.clear(); - m_total_normal_dv.clear(); - m_total_tangent_dv.clear(); - m_static.clear(); - m_can_be_dynamic.clear(); - append(rcontact); - } - - ~DeformableContactConstraint() - { - } + const btSoftBody::Node* m_node; + btAlignedObjectArray<const btSoftBody::RContact*> m_contact; + btAlignedObjectArray<btVector3> m_total_normal_dv; + btAlignedObjectArray<btVector3> m_total_tangent_dv; + btAlignedObjectArray<bool> m_static; + btAlignedObjectArray<bool> m_can_be_dynamic; + + DeformableContactConstraint(const btSoftBody::RContact& rcontact) : m_node(rcontact.m_node) + { + append(rcontact); + } + + DeformableContactConstraint() : m_node(NULL) + { + m_contact.push_back(NULL); + } + + void append(const btSoftBody::RContact& rcontact) + { + m_contact.push_back(&rcontact); + m_total_normal_dv.push_back(btVector3(0, 0, 0)); + m_total_tangent_dv.push_back(btVector3(0, 0, 0)); + m_static.push_back(false); + m_can_be_dynamic.push_back(true); + } + + void replace(const btSoftBody::RContact& rcontact) + { + m_contact.clear(); + m_total_normal_dv.clear(); + m_total_tangent_dv.clear(); + m_static.clear(); + m_can_be_dynamic.clear(); + append(rcontact); + } + + ~DeformableContactConstraint() + { + } }; class btCGProjection { public: - typedef btAlignedObjectArray<btVector3> TVStack; - typedef btAlignedObjectArray<btAlignedObjectArray<btVector3> > TVArrayStack; - typedef btAlignedObjectArray<btAlignedObjectArray<btScalar> > TArrayStack; - btAlignedObjectArray<btSoftBody *>& m_softBodies; - const btScalar& m_dt; - // map from node indices to node pointers - const btAlignedObjectArray<btSoftBody::Node*>* m_nodes; - - btCGProjection(btAlignedObjectArray<btSoftBody *>& softBodies, const btScalar& dt) - : m_softBodies(softBodies) - , m_dt(dt) - { - } - - virtual ~btCGProjection() - { - } - - // apply the constraints - virtual void project(TVStack& x) = 0; - - virtual void setConstraints() = 0; - - // update the constraints - virtual btScalar update() = 0; - - virtual void reinitialize(bool nodeUpdated) - { - } - - virtual void setIndices(const btAlignedObjectArray<btSoftBody::Node*>* nodes) - { - m_nodes = nodes; - } -}; + typedef btAlignedObjectArray<btVector3> TVStack; + typedef btAlignedObjectArray<btAlignedObjectArray<btVector3> > TVArrayStack; + typedef btAlignedObjectArray<btAlignedObjectArray<btScalar> > TArrayStack; + btAlignedObjectArray<btSoftBody*>& m_softBodies; + const btScalar& m_dt; + // map from node indices to node pointers + const btAlignedObjectArray<btSoftBody::Node*>* m_nodes; + + btCGProjection(btAlignedObjectArray<btSoftBody*>& softBodies, const btScalar& dt) + : m_softBodies(softBodies), m_dt(dt) + { + } + virtual ~btCGProjection() + { + } + + // apply the constraints + virtual void project(TVStack& x) = 0; + + virtual void setConstraints() = 0; + + // update the constraints + virtual btScalar update() = 0; + + virtual void reinitialize(bool nodeUpdated) + { + } + + virtual void setIndices(const btAlignedObjectArray<btSoftBody::Node*>* nodes) + { + m_nodes = nodes; + } +}; #endif /* btCGProjection_h */ diff --git a/thirdparty/bullet/BulletSoftBody/btConjugateGradient.h b/thirdparty/bullet/BulletSoftBody/btConjugateGradient.h index bd51e584b9..bcd5e6b519 100644 --- a/thirdparty/bullet/BulletSoftBody/btConjugateGradient.h +++ b/thirdparty/bullet/BulletSoftBody/btConjugateGradient.h @@ -15,144 +15,103 @@ #ifndef BT_CONJUGATE_GRADIENT_H #define BT_CONJUGATE_GRADIENT_H -#include <iostream> -#include <cmath> -#include <limits> -#include <LinearMath/btAlignedObjectArray.h> -#include <LinearMath/btVector3.h> -#include "LinearMath/btQuickprof.h" +#include "btKrylovSolver.h" template <class MatrixX> -class btConjugateGradient +class btConjugateGradient : public btKrylovSolver<MatrixX> { - typedef btAlignedObjectArray<btVector3> TVStack; - TVStack r,p,z,temp; - int max_iterations; - btScalar tolerance_squared; + typedef btAlignedObjectArray<btVector3> TVStack; + typedef btKrylovSolver<MatrixX> Base; + TVStack r, p, z, temp; + public: - btConjugateGradient(const int max_it_in) - : max_iterations(max_it_in) - { - tolerance_squared = 1e-5; - } - - virtual ~btConjugateGradient(){} - - // return the number of iterations taken - int solve(MatrixX& A, TVStack& x, const TVStack& b, bool verbose = false) - { - BT_PROFILE("CGSolve"); - btAssert(x.size() == b.size()); - reinitialize(b); - // r = b - A * x --with assigned dof zeroed out - A.multiply(x, temp); - r = sub(b, temp); - A.project(r); - // z = M^(-1) * r - A.precondition(r, z); - A.project(z); - btScalar r_dot_z = dot(z,r); - if (r_dot_z <= tolerance_squared) { - if (verbose) - { - std::cout << "Iteration = 0" << std::endl; - std::cout << "Two norm of the residual = " << r_dot_z << std::endl; - } - return 0; - } - p = z; - btScalar r_dot_z_new = r_dot_z; - for (int k = 1; k <= max_iterations; k++) { - // temp = A*p - A.multiply(p, temp); - A.project(temp); - if (dot(p,temp) < SIMD_EPSILON) - { - if (verbose) - std::cout << "Encountered negative direction in CG!" << std::endl; - if (k == 1) - { - x = b; - } - return k; - } - // alpha = r^T * z / (p^T * A * p) - btScalar alpha = r_dot_z_new / dot(p, temp); - // x += alpha * p; - multAndAddTo(alpha, p, x); - // r -= alpha * temp; - multAndAddTo(-alpha, temp, r); - // z = M^(-1) * r - A.precondition(r, z); - r_dot_z = r_dot_z_new; - r_dot_z_new = dot(r,z); - if (r_dot_z_new < tolerance_squared) { - if (verbose) - { - std::cout << "ConjugateGradient iterations " << k << std::endl; - } - return k; - } + btConjugateGradient(const int max_it_in) + : btKrylovSolver<MatrixX>(max_it_in, SIMD_EPSILON) + { + } + + virtual ~btConjugateGradient() {} + + // return the number of iterations taken + int solve(MatrixX& A, TVStack& x, const TVStack& b, bool verbose = false) + { + BT_PROFILE("CGSolve"); + btAssert(x.size() == b.size()); + reinitialize(b); + temp = b; + A.project(temp); + p = temp; + A.precondition(p, z); + btScalar d0 = this->dot(z, temp); + d0 = btMin(btScalar(1), d0); + // r = b - A * x --with assigned dof zeroed out + A.multiply(x, temp); + r = this->sub(b, temp); + A.project(r); + // z = M^(-1) * r + A.precondition(r, z); + A.project(z); + btScalar r_dot_z = this->dot(z, r); + if (r_dot_z <= Base::m_tolerance * d0) + { + if (verbose) + { + std::cout << "Iteration = 0" << std::endl; + std::cout << "Two norm of the residual = " << r_dot_z << std::endl; + } + return 0; + } + p = z; + btScalar r_dot_z_new = r_dot_z; + for (int k = 1; k <= Base::m_maxIterations; k++) + { + // temp = A*p + A.multiply(p, temp); + A.project(temp); + if (this->dot(p, temp) < 0) + { + if (verbose) + std::cout << "Encountered negative direction in CG!" << std::endl; + if (k == 1) + { + x = b; + } + return k; + } + // alpha = r^T * z / (p^T * A * p) + btScalar alpha = r_dot_z_new / this->dot(p, temp); + // x += alpha * p; + this->multAndAddTo(alpha, p, x); + // r -= alpha * temp; + this->multAndAddTo(-alpha, temp, r); + // z = M^(-1) * r + A.precondition(r, z); + r_dot_z = r_dot_z_new; + r_dot_z_new = this->dot(r, z); + if (r_dot_z_new < Base::m_tolerance * d0) + { + if (verbose) + { + std::cout << "ConjugateGradient iterations " << k << " residual = " << r_dot_z_new << std::endl; + } + return k; + } + + btScalar beta = r_dot_z_new / r_dot_z; + p = this->multAndAdd(beta, p, z); + } + if (verbose) + { + std::cout << "ConjugateGradient max iterations reached " << Base::m_maxIterations << " error = " << r_dot_z_new << std::endl; + } + return Base::m_maxIterations; + } - btScalar beta = r_dot_z_new/r_dot_z; - p = multAndAdd(beta, p, z); - } - if (verbose) - { - std::cout << "ConjugateGradient max iterations reached " << max_iterations << std::endl; - } - return max_iterations; - } - - void reinitialize(const TVStack& b) - { - r.resize(b.size()); - p.resize(b.size()); - z.resize(b.size()); - temp.resize(b.size()); - } - - TVStack sub(const TVStack& a, const TVStack& b) - { - // c = a-b - btAssert(a.size() == b.size()); - TVStack c; - c.resize(a.size()); - for (int i = 0; i < a.size(); ++i) - { - c[i] = a[i] - b[i]; - } - return c; - } - - btScalar squaredNorm(const TVStack& a) - { - return dot(a,a); - } - - btScalar dot(const TVStack& a, const TVStack& b) - { - btScalar ans(0); - for (int i = 0; i < a.size(); ++i) - ans += a[i].dot(b[i]); - return ans; - } - - void multAndAddTo(btScalar s, const TVStack& a, TVStack& result) - { -// result += s*a - btAssert(a.size() == result.size()); - for (int i = 0; i < a.size(); ++i) - result[i] += s * a[i]; - } - - TVStack multAndAdd(btScalar s, const TVStack& a, const TVStack& b) - { - // result = a*s + b - TVStack result; - result.resize(a.size()); - for (int i = 0; i < a.size(); ++i) - result[i] = s * a[i] + b[i]; - return result; - } + void reinitialize(const TVStack& b) + { + r.resize(b.size()); + p.resize(b.size()); + z.resize(b.size()); + temp.resize(b.size()); + } }; #endif /* btConjugateGradient_h */ diff --git a/thirdparty/bullet/BulletSoftBody/btConjugateResidual.h b/thirdparty/bullet/BulletSoftBody/btConjugateResidual.h index 7b211c4172..6146120365 100644 --- a/thirdparty/bullet/BulletSoftBody/btConjugateResidual.h +++ b/thirdparty/bullet/BulletSoftBody/btConjugateResidual.h @@ -15,174 +15,98 @@ #ifndef BT_CONJUGATE_RESIDUAL_H #define BT_CONJUGATE_RESIDUAL_H -#include <iostream> -#include <cmath> -#include <limits> -#include <LinearMath/btAlignedObjectArray.h> -#include <LinearMath/btVector3.h> -#include <LinearMath/btScalar.h> -#include "LinearMath/btQuickprof.h" +#include "btKrylovSolver.h" + template <class MatrixX> -class btConjugateResidual +class btConjugateResidual : public btKrylovSolver<MatrixX> { - typedef btAlignedObjectArray<btVector3> TVStack; - TVStack r,p,z,temp_p, temp_r, best_x; - // temp_r = A*r - // temp_p = A*p - // z = M^(-1) * temp_p = M^(-1) * A * p - int max_iterations; - btScalar tolerance_squared, best_r; + typedef btAlignedObjectArray<btVector3> TVStack; + typedef btKrylovSolver<MatrixX> Base; + TVStack r, p, z, temp_p, temp_r, best_x; + // temp_r = A*r + // temp_p = A*p + // z = M^(-1) * temp_p = M^(-1) * A * p + btScalar best_r; + public: - btConjugateResidual(const int max_it_in) - : max_iterations(max_it_in) - { - tolerance_squared = 1e-2; - } - - virtual ~btConjugateResidual(){} - - // return the number of iterations taken - int solve(MatrixX& A, TVStack& x, const TVStack& b, bool verbose = false) - { - BT_PROFILE("CRSolve"); - btAssert(x.size() == b.size()); - reinitialize(b); - // r = b - A * x --with assigned dof zeroed out - A.multiply(x, temp_r); // borrow temp_r here to store A*x - r = sub(b, temp_r); - // z = M^(-1) * r - A.precondition(r, z); // borrow z to store preconditioned r - r = z; - btScalar residual_norm = norm(r); - if (residual_norm <= tolerance_squared) { - if (verbose) - { - std::cout << "Iteration = 0" << std::endl; - std::cout << "Two norm of the residual = " << residual_norm << std::endl; - } - return 0; - } - p = r; - btScalar r_dot_Ar, r_dot_Ar_new; - // temp_p = A*p - A.multiply(p, temp_p); - // temp_r = A*r - temp_r = temp_p; - r_dot_Ar = dot(r, temp_r); - for (int k = 1; k <= max_iterations; k++) { - // z = M^(-1) * Ap - A.precondition(temp_p, z); - // alpha = r^T * A * r / (Ap)^T * M^-1 * Ap) - btScalar alpha = r_dot_Ar / dot(temp_p, z); - // x += alpha * p; - multAndAddTo(alpha, p, x); - // r -= alpha * z; - multAndAddTo(-alpha, z, r); - btScalar norm_r = norm(r); - if (norm_r < best_r) - { - best_x = x; - best_r = norm_r; - if (norm_r < tolerance_squared) { - if (verbose) - { - std::cout << "ConjugateResidual iterations " << k << std::endl; - } - return k; - } - else - { - if (verbose) - { - std::cout << "ConjugateResidual iterations " << k << " has residual "<< norm_r << std::endl; - } - } - } - // temp_r = A * r; - A.multiply(r, temp_r); - r_dot_Ar_new = dot(r, temp_r); - btScalar beta = r_dot_Ar_new/r_dot_Ar; - r_dot_Ar = r_dot_Ar_new; - // p = beta*p + r; - p = multAndAdd(beta, p, r); - // temp_p = beta*temp_p + temp_r; - temp_p = multAndAdd(beta, temp_p, temp_r); - } - if (verbose) - { - std::cout << "ConjugateResidual max iterations reached " << max_iterations << std::endl; - } - x = best_x; - return max_iterations; - } - - void reinitialize(const TVStack& b) - { - r.resize(b.size()); - p.resize(b.size()); - z.resize(b.size()); - temp_p.resize(b.size()); - temp_r.resize(b.size()); - best_x.resize(b.size()); - best_r = SIMD_INFINITY; - } - - TVStack sub(const TVStack& a, const TVStack& b) - { - // c = a-b - btAssert(a.size() == b.size()); - TVStack c; - c.resize(a.size()); - for (int i = 0; i < a.size(); ++i) - { - c[i] = a[i] - b[i]; - } - return c; - } - - btScalar squaredNorm(const TVStack& a) - { - return dot(a,a); - } - - btScalar norm(const TVStack& a) - { - btScalar ret = 0; - for (int i = 0; i < a.size(); ++i) - { - for (int d = 0; d < 3; ++d) - { - ret = btMax(ret, btFabs(a[i][d])); - } - } - return ret; - } - - btScalar dot(const TVStack& a, const TVStack& b) - { - btScalar ans(0); - for (int i = 0; i < a.size(); ++i) - ans += a[i].dot(b[i]); - return ans; - } - - void multAndAddTo(btScalar s, const TVStack& a, TVStack& result) - { - // result += s*a - btAssert(a.size() == result.size()); - for (int i = 0; i < a.size(); ++i) - result[i] += s * a[i]; - } - - TVStack multAndAdd(btScalar s, const TVStack& a, const TVStack& b) - { - // result = a*s + b - TVStack result; - result.resize(a.size()); - for (int i = 0; i < a.size(); ++i) - result[i] = s * a[i] + b[i]; - return result; - } + btConjugateResidual(const int max_it_in) + : Base(max_it_in, 1e-8) + { + } + + virtual ~btConjugateResidual() {} + + // return the number of iterations taken + int solve(MatrixX& A, TVStack& x, const TVStack& b, bool verbose = false) + { + BT_PROFILE("CRSolve"); + btAssert(x.size() == b.size()); + reinitialize(b); + // r = b - A * x --with assigned dof zeroed out + A.multiply(x, temp_r); // borrow temp_r here to store A*x + r = this->sub(b, temp_r); + // z = M^(-1) * r + A.precondition(r, z); // borrow z to store preconditioned r + r = z; + btScalar residual_norm = this->norm(r); + if (residual_norm <= Base::m_tolerance) + { + return 0; + } + p = r; + btScalar r_dot_Ar, r_dot_Ar_new; + // temp_p = A*p + A.multiply(p, temp_p); + // temp_r = A*r + temp_r = temp_p; + r_dot_Ar = this->dot(r, temp_r); + for (int k = 1; k <= Base::m_maxIterations; k++) + { + // z = M^(-1) * Ap + A.precondition(temp_p, z); + // alpha = r^T * A * r / (Ap)^T * M^-1 * Ap) + btScalar alpha = r_dot_Ar / this->dot(temp_p, z); + // x += alpha * p; + this->multAndAddTo(alpha, p, x); + // r -= alpha * z; + this->multAndAddTo(-alpha, z, r); + btScalar norm_r = this->norm(r); + if (norm_r < best_r) + { + best_x = x; + best_r = norm_r; + if (norm_r < Base::m_tolerance) + { + return k; + } + } + // temp_r = A * r; + A.multiply(r, temp_r); + r_dot_Ar_new = this->dot(r, temp_r); + btScalar beta = r_dot_Ar_new / r_dot_Ar; + r_dot_Ar = r_dot_Ar_new; + // p = beta*p + r; + p = this->multAndAdd(beta, p, r); + // temp_p = beta*temp_p + temp_r; + temp_p = this->multAndAdd(beta, temp_p, temp_r); + } + if (verbose) + { + std::cout << "ConjugateResidual max iterations reached, residual = " << best_r << std::endl; + } + x = best_x; + return Base::m_maxIterations; + } + + void reinitialize(const TVStack& b) + { + r.resize(b.size()); + p.resize(b.size()); + z.resize(b.size()); + temp_p.resize(b.size()); + temp_r.resize(b.size()); + best_x.resize(b.size()); + best_r = SIMD_INFINITY; + } }; #endif /* btConjugateResidual_h */ - diff --git a/thirdparty/bullet/BulletSoftBody/btDeformableBackwardEulerObjective.cpp b/thirdparty/bullet/BulletSoftBody/btDeformableBackwardEulerObjective.cpp index 5381ee6265..2455ed2138 100644 --- a/thirdparty/bullet/BulletSoftBody/btDeformableBackwardEulerObjective.cpp +++ b/thirdparty/bullet/BulletSoftBody/btDeformableBackwardEulerObjective.cpp @@ -17,211 +17,283 @@ #include "btPreconditioner.h" #include "LinearMath/btQuickprof.h" -btDeformableBackwardEulerObjective::btDeformableBackwardEulerObjective(btAlignedObjectArray<btSoftBody *>& softBodies, const TVStack& backup_v) -: m_softBodies(softBodies) -, m_projection(softBodies) -, m_backupVelocity(backup_v) -, m_implicit(false) +btDeformableBackwardEulerObjective::btDeformableBackwardEulerObjective(btAlignedObjectArray<btSoftBody*>& softBodies, const TVStack& backup_v) + : m_softBodies(softBodies), m_projection(softBodies), m_backupVelocity(backup_v), m_implicit(false) { - m_massPreconditioner = new MassPreconditioner(m_softBodies); - m_KKTPreconditioner = new KKTPreconditioner(m_softBodies, m_projection, m_lf, m_dt, m_implicit); - m_preconditioner = m_KKTPreconditioner; + m_massPreconditioner = new MassPreconditioner(m_softBodies); + m_KKTPreconditioner = new KKTPreconditioner(m_softBodies, m_projection, m_lf, m_dt, m_implicit); + m_preconditioner = m_KKTPreconditioner; } btDeformableBackwardEulerObjective::~btDeformableBackwardEulerObjective() { - delete m_KKTPreconditioner; - delete m_massPreconditioner; + delete m_KKTPreconditioner; + delete m_massPreconditioner; } void btDeformableBackwardEulerObjective::reinitialize(bool nodeUpdated, btScalar dt) { - BT_PROFILE("reinitialize"); - if (dt > 0) - { - setDt(dt); - } - if(nodeUpdated) - { - updateId(); - } - for (int i = 0; i < m_lf.size(); ++i) - { - m_lf[i]->reinitialize(nodeUpdated); - } - m_projection.reinitialize(nodeUpdated); -// m_preconditioner->reinitialize(nodeUpdated); + BT_PROFILE("reinitialize"); + if (dt > 0) + { + setDt(dt); + } + if (nodeUpdated) + { + updateId(); + } + for (int i = 0; i < m_lf.size(); ++i) + { + m_lf[i]->reinitialize(nodeUpdated); + } + btMatrix3x3 I; + I.setIdentity(); + for (int i = 0; i < m_softBodies.size(); ++i) + { + btSoftBody* psb = m_softBodies[i]; + for (int j = 0; j < psb->m_nodes.size(); ++j) + { + if (psb->m_nodes[j].m_im > 0) + psb->m_nodes[j].m_effectiveMass = I * (1.0 / psb->m_nodes[j].m_im); + } + } + m_projection.reinitialize(nodeUpdated); + // m_preconditioner->reinitialize(nodeUpdated); } void btDeformableBackwardEulerObjective::setDt(btScalar dt) { - m_dt = dt; + m_dt = dt; } void btDeformableBackwardEulerObjective::multiply(const TVStack& x, TVStack& b) const { - BT_PROFILE("multiply"); - // add in the mass term - size_t counter = 0; - for (int i = 0; i < m_softBodies.size(); ++i) - { - btSoftBody* psb = m_softBodies[i]; - for (int j = 0; j < psb->m_nodes.size(); ++j) - { - const btSoftBody::Node& node = psb->m_nodes[j]; - b[counter] = (node.m_im == 0) ? btVector3(0,0,0) : x[counter] / node.m_im; - ++counter; - } - } - - for (int i = 0; i < m_lf.size(); ++i) - { - // add damping matrix - m_lf[i]->addScaledDampingForceDifferential(-m_dt, x, b); - if (m_implicit) - { - m_lf[i]->addScaledElasticForceDifferential(-m_dt*m_dt, x, b); - } - } - int offset = m_nodes.size(); - for (int i = offset; i < b.size(); ++i) - { - b[i].setZero(); - } - // add in the lagrange multiplier terms - - for (int c = 0; c < m_projection.m_lagrangeMultipliers.size(); ++c) - { - // C^T * lambda - const LagrangeMultiplier& lm = m_projection.m_lagrangeMultipliers[c]; - for (int i = 0; i < lm.m_num_nodes; ++i) - { - for (int j = 0; j < lm.m_num_constraints; ++j) - { - b[lm.m_indices[i]] += x[offset+c][j] * lm.m_weights[i] * lm.m_dirs[j]; - } - } - // C * x - for (int d = 0; d < lm.m_num_constraints; ++d) - { - for (int i = 0; i < lm.m_num_nodes; ++i) - { - b[offset+c][d] += lm.m_weights[i] * x[lm.m_indices[i]].dot(lm.m_dirs[d]); - } - } - } + BT_PROFILE("multiply"); + // add in the mass term + size_t counter = 0; + for (int i = 0; i < m_softBodies.size(); ++i) + { + btSoftBody* psb = m_softBodies[i]; + for (int j = 0; j < psb->m_nodes.size(); ++j) + { + const btSoftBody::Node& node = psb->m_nodes[j]; + b[counter] = (node.m_im == 0) ? btVector3(0, 0, 0) : x[counter] / node.m_im; + ++counter; + } + } + + for (int i = 0; i < m_lf.size(); ++i) + { + // add damping matrix + m_lf[i]->addScaledDampingForceDifferential(-m_dt, x, b); + // Always integrate picking force implicitly for stability. + if (m_implicit || m_lf[i]->getForceType() == BT_MOUSE_PICKING_FORCE) + { + m_lf[i]->addScaledElasticForceDifferential(-m_dt * m_dt, x, b); + } + } + int offset = m_nodes.size(); + for (int i = offset; i < b.size(); ++i) + { + b[i].setZero(); + } + // add in the lagrange multiplier terms + + for (int c = 0; c < m_projection.m_lagrangeMultipliers.size(); ++c) + { + // C^T * lambda + const LagrangeMultiplier& lm = m_projection.m_lagrangeMultipliers[c]; + for (int i = 0; i < lm.m_num_nodes; ++i) + { + for (int j = 0; j < lm.m_num_constraints; ++j) + { + b[lm.m_indices[i]] += x[offset + c][j] * lm.m_weights[i] * lm.m_dirs[j]; + } + } + // C * x + for (int d = 0; d < lm.m_num_constraints; ++d) + { + for (int i = 0; i < lm.m_num_nodes; ++i) + { + b[offset + c][d] += lm.m_weights[i] * x[lm.m_indices[i]].dot(lm.m_dirs[d]); + } + } + } } void btDeformableBackwardEulerObjective::updateVelocity(const TVStack& dv) { - for (int i = 0; i < m_softBodies.size(); ++i) - { - btSoftBody* psb = m_softBodies[i]; - for (int j = 0; j < psb->m_nodes.size(); ++j) - { - btSoftBody::Node& node = psb->m_nodes[j]; - node.m_v = m_backupVelocity[node.index] + dv[node.index]; - } - } + for (int i = 0; i < m_softBodies.size(); ++i) + { + btSoftBody* psb = m_softBodies[i]; + for (int j = 0; j < psb->m_nodes.size(); ++j) + { + btSoftBody::Node& node = psb->m_nodes[j]; + node.m_v = m_backupVelocity[node.index] + dv[node.index]; + } + } } void btDeformableBackwardEulerObjective::applyForce(TVStack& force, bool setZero) { - size_t counter = 0; - for (int i = 0; i < m_softBodies.size(); ++i) - { - btSoftBody* psb = m_softBodies[i]; - if (!psb->isActive()) - { - counter += psb->m_nodes.size(); - continue; - } - for (int j = 0; j < psb->m_nodes.size(); ++j) - { - btScalar one_over_mass = (psb->m_nodes[j].m_im == 0) ? 0 : psb->m_nodes[j].m_im; - psb->m_nodes[j].m_v += one_over_mass * force[counter++]; - } - } - if (setZero) - { - for (int i = 0; i < force.size(); ++i) - force[i].setZero(); - } + size_t counter = 0; + for (int i = 0; i < m_softBodies.size(); ++i) + { + btSoftBody* psb = m_softBodies[i]; + if (!psb->isActive()) + { + counter += psb->m_nodes.size(); + continue; + } + if (m_implicit) + { + for (int j = 0; j < psb->m_nodes.size(); ++j) + { + if (psb->m_nodes[j].m_im != 0) + { + psb->m_nodes[j].m_v += psb->m_nodes[j].m_effectiveMass_inv * force[counter++]; + } + } + } + else + { + for (int j = 0; j < psb->m_nodes.size(); ++j) + { + btScalar one_over_mass = (psb->m_nodes[j].m_im == 0) ? 0 : psb->m_nodes[j].m_im; + psb->m_nodes[j].m_v += one_over_mass * force[counter++]; + } + } + } + if (setZero) + { + for (int i = 0; i < force.size(); ++i) + force[i].setZero(); + } } -void btDeformableBackwardEulerObjective::computeResidual(btScalar dt, TVStack &residual) +void btDeformableBackwardEulerObjective::computeResidual(btScalar dt, TVStack& residual) { - BT_PROFILE("computeResidual"); - // add implicit force - for (int i = 0; i < m_lf.size(); ++i) - { - if (m_implicit) - { - m_lf[i]->addScaledForces(dt, residual); - } - else - { - m_lf[i]->addScaledDampingForce(dt, residual); - } - } -// m_projection.project(residual); + BT_PROFILE("computeResidual"); + // add implicit force + for (int i = 0; i < m_lf.size(); ++i) + { + // Always integrate picking force implicitly for stability. + if (m_implicit || m_lf[i]->getForceType() == BT_MOUSE_PICKING_FORCE) + { + m_lf[i]->addScaledForces(dt, residual); + } + else + { + m_lf[i]->addScaledDampingForce(dt, residual); + } + } + // m_projection.project(residual); } btScalar btDeformableBackwardEulerObjective::computeNorm(const TVStack& residual) const { - btScalar mag = 0; - for (int i = 0; i < residual.size(); ++i) - { - mag += residual[i].length2(); - } - return std::sqrt(mag); + btScalar mag = 0; + for (int i = 0; i < residual.size(); ++i) + { + mag += residual[i].length2(); + } + return std::sqrt(mag); } btScalar btDeformableBackwardEulerObjective::totalEnergy(btScalar dt) { - btScalar e = 0; - for (int i = 0; i < m_lf.size(); ++i) - { - e += m_lf[i]->totalEnergy(dt); - } - return e; + btScalar e = 0; + for (int i = 0; i < m_lf.size(); ++i) + { + e += m_lf[i]->totalEnergy(dt); + } + return e; } void btDeformableBackwardEulerObjective::applyExplicitForce(TVStack& force) { - for (int i = 0; i < m_softBodies.size(); ++i) - { - m_softBodies[i]->advanceDeformation(); - } - - for (int i = 0; i < m_lf.size(); ++i) - { - m_lf[i]->addScaledExplicitForce(m_dt, force); - } - applyForce(force, true); + for (int i = 0; i < m_softBodies.size(); ++i) + { + m_softBodies[i]->advanceDeformation(); + } + if (m_implicit) + { + // apply forces except gravity force + btVector3 gravity; + for (int i = 0; i < m_lf.size(); ++i) + { + if (m_lf[i]->getForceType() == BT_GRAVITY_FORCE) + { + gravity = static_cast<btDeformableGravityForce*>(m_lf[i])->m_gravity; + } + else + { + m_lf[i]->addScaledForces(m_dt, force); + } + } + for (int i = 0; i < m_lf.size(); ++i) + { + m_lf[i]->addScaledHessian(m_dt); + } + for (int i = 0; i < m_softBodies.size(); ++i) + { + btSoftBody* psb = m_softBodies[i]; + if (psb->isActive()) + { + for (int j = 0; j < psb->m_nodes.size(); ++j) + { + // add gravity explicitly + psb->m_nodes[j].m_v += m_dt * psb->m_gravityFactor * gravity; + } + } + } + } + else + { + for (int i = 0; i < m_lf.size(); ++i) + { + m_lf[i]->addScaledExplicitForce(m_dt, force); + } + } + // calculate inverse mass matrix for all nodes + for (int i = 0; i < m_softBodies.size(); ++i) + { + btSoftBody* psb = m_softBodies[i]; + if (psb->isActive()) + { + for (int j = 0; j < psb->m_nodes.size(); ++j) + { + if (psb->m_nodes[j].m_im > 0) + { + psb->m_nodes[j].m_effectiveMass_inv = psb->m_nodes[j].m_effectiveMass.inverse(); + } + } + } + } + applyForce(force, true); } void btDeformableBackwardEulerObjective::initialGuess(TVStack& dv, const TVStack& residual) { - size_t counter = 0; - for (int i = 0; i < m_softBodies.size(); ++i) - { - btSoftBody* psb = m_softBodies[i]; - for (int j = 0; j < psb->m_nodes.size(); ++j) - { - dv[counter] = psb->m_nodes[j].m_im * residual[counter]; - ++counter; - } - } + size_t counter = 0; + for (int i = 0; i < m_softBodies.size(); ++i) + { + btSoftBody* psb = m_softBodies[i]; + for (int j = 0; j < psb->m_nodes.size(); ++j) + { + dv[counter] = psb->m_nodes[j].m_im * residual[counter]; + ++counter; + } + } } //set constraints as projections void btDeformableBackwardEulerObjective::setConstraints(const btContactSolverInfo& infoGlobal) { - m_projection.setConstraints(infoGlobal); + m_projection.setConstraints(infoGlobal); } void btDeformableBackwardEulerObjective::applyDynamicFriction(TVStack& r) { - m_projection.applyDynamicFriction(r); + m_projection.applyDynamicFriction(r); } diff --git a/thirdparty/bullet/BulletSoftBody/btDeformableBackwardEulerObjective.h b/thirdparty/bullet/BulletSoftBody/btDeformableBackwardEulerObjective.h index 86579e71ac..eb05b9f010 100644 --- a/thirdparty/bullet/BulletSoftBody/btDeformableBackwardEulerObjective.h +++ b/thirdparty/bullet/BulletSoftBody/btDeformableBackwardEulerObjective.h @@ -31,143 +31,168 @@ class btDeformableBackwardEulerObjective { public: - typedef btAlignedObjectArray<btVector3> TVStack; - btScalar m_dt; - btAlignedObjectArray<btDeformableLagrangianForce*> m_lf; - btAlignedObjectArray<btSoftBody *>& m_softBodies; - Preconditioner* m_preconditioner; - btDeformableContactProjection m_projection; - const TVStack& m_backupVelocity; - btAlignedObjectArray<btSoftBody::Node* > m_nodes; - bool m_implicit; - MassPreconditioner* m_massPreconditioner; - KKTPreconditioner* m_KKTPreconditioner; - - btDeformableBackwardEulerObjective(btAlignedObjectArray<btSoftBody *>& softBodies, const TVStack& backup_v); - - virtual ~btDeformableBackwardEulerObjective(); - - void initialize(){} - - // compute the rhs for CG solve, i.e, add the dt scaled implicit force to residual - void computeResidual(btScalar dt, TVStack& residual); - - // add explicit force to the velocity - void applyExplicitForce(TVStack& force); - - // apply force to velocity and optionally reset the force to zero - void applyForce(TVStack& force, bool setZero); - - // compute the norm of the residual - btScalar computeNorm(const TVStack& residual) const; - - // compute one step of the solve (there is only one solve if the system is linear) - void computeStep(TVStack& dv, const TVStack& residual, const btScalar& dt); - - // perform A*x = b - void multiply(const TVStack& x, TVStack& b) const; - - // set initial guess for CG solve - void initialGuess(TVStack& dv, const TVStack& residual); - - // reset data structure and reset dt - void reinitialize(bool nodeUpdated, btScalar dt); - - void setDt(btScalar dt); - - // add friction force to residual - void applyDynamicFriction(TVStack& r); - - // add dv to velocity - void updateVelocity(const TVStack& dv); - - //set constraints as projections - void setConstraints(const btContactSolverInfo& infoGlobal); - - // update the projections and project the residual - void project(TVStack& r) - { - BT_PROFILE("project"); - m_projection.project(r); - } - - // perform precondition M^(-1) x = b - void precondition(const TVStack& x, TVStack& b) - { - m_preconditioner->operator()(x,b); - } - - // reindex all the vertices - virtual void updateId() - { - size_t node_id = 0; - size_t face_id = 0; - m_nodes.clear(); - for (int i = 0; i < m_softBodies.size(); ++i) - { - btSoftBody* psb = m_softBodies[i]; - for (int j = 0; j < psb->m_nodes.size(); ++j) - { - psb->m_nodes[j].index = node_id; - m_nodes.push_back(&psb->m_nodes[j]); - ++node_id; - } - for (int j = 0; j < psb->m_faces.size(); ++j) - { - psb->m_faces[j].m_index = face_id; - ++face_id; - } - } - } - - const btAlignedObjectArray<btSoftBody::Node*>* getIndices() const - { - return &m_nodes; - } - - void setImplicit(bool implicit) - { - m_implicit = implicit; - } - - // Calculate the total potential energy in the system - btScalar totalEnergy(btScalar dt); - - void addLagrangeMultiplier(const TVStack& vec, TVStack& extended_vec) - { - extended_vec.resize(vec.size() + m_projection.m_lagrangeMultipliers.size()); - for (int i = 0; i < vec.size(); ++i) - { - extended_vec[i] = vec[i]; - } - int offset = vec.size(); - for (int i = 0; i < m_projection.m_lagrangeMultipliers.size(); ++i) - { - extended_vec[offset + i].setZero(); - } - } - - void addLagrangeMultiplierRHS(const TVStack& residual, const TVStack& m_dv, TVStack& extended_residual) - { - extended_residual.resize(residual.size() + m_projection.m_lagrangeMultipliers.size()); - for (int i = 0; i < residual.size(); ++i) - { - extended_residual[i] = residual[i]; - } - int offset = residual.size(); - for (int i = 0; i < m_projection.m_lagrangeMultipliers.size(); ++i) - { - const LagrangeMultiplier& lm = m_projection.m_lagrangeMultipliers[i]; - extended_residual[offset + i].setZero(); - for (int d = 0; d < lm.m_num_constraints; ++d) - { - for (int n = 0; n < lm.m_num_nodes; ++n) - { - extended_residual[offset + i][d] += lm.m_weights[n] * m_dv[lm.m_indices[n]].dot(lm.m_dirs[d]); - } - } - } - } + typedef btAlignedObjectArray<btVector3> TVStack; + btScalar m_dt; + btAlignedObjectArray<btDeformableLagrangianForce*> m_lf; + btAlignedObjectArray<btSoftBody*>& m_softBodies; + Preconditioner* m_preconditioner; + btDeformableContactProjection m_projection; + const TVStack& m_backupVelocity; + btAlignedObjectArray<btSoftBody::Node*> m_nodes; + bool m_implicit; + MassPreconditioner* m_massPreconditioner; + KKTPreconditioner* m_KKTPreconditioner; + + btDeformableBackwardEulerObjective(btAlignedObjectArray<btSoftBody*>& softBodies, const TVStack& backup_v); + + virtual ~btDeformableBackwardEulerObjective(); + + void initialize() {} + + // compute the rhs for CG solve, i.e, add the dt scaled implicit force to residual + void computeResidual(btScalar dt, TVStack& residual); + + // add explicit force to the velocity + void applyExplicitForce(TVStack& force); + + // apply force to velocity and optionally reset the force to zero + void applyForce(TVStack& force, bool setZero); + + // compute the norm of the residual + btScalar computeNorm(const TVStack& residual) const; + + // compute one step of the solve (there is only one solve if the system is linear) + void computeStep(TVStack& dv, const TVStack& residual, const btScalar& dt); + + // perform A*x = b + void multiply(const TVStack& x, TVStack& b) const; + + // set initial guess for CG solve + void initialGuess(TVStack& dv, const TVStack& residual); + + // reset data structure and reset dt + void reinitialize(bool nodeUpdated, btScalar dt); + + void setDt(btScalar dt); + + // add friction force to residual + void applyDynamicFriction(TVStack& r); + + // add dv to velocity + void updateVelocity(const TVStack& dv); + + //set constraints as projections + void setConstraints(const btContactSolverInfo& infoGlobal); + + // update the projections and project the residual + void project(TVStack& r) + { + BT_PROFILE("project"); + m_projection.project(r); + } + + // perform precondition M^(-1) x = b + void precondition(const TVStack& x, TVStack& b) + { + m_preconditioner->operator()(x, b); + } + + // reindex all the vertices + virtual void updateId() + { + size_t node_id = 0; + size_t face_id = 0; + m_nodes.clear(); + for (int i = 0; i < m_softBodies.size(); ++i) + { + btSoftBody* psb = m_softBodies[i]; + for (int j = 0; j < psb->m_nodes.size(); ++j) + { + psb->m_nodes[j].index = node_id; + m_nodes.push_back(&psb->m_nodes[j]); + ++node_id; + } + for (int j = 0; j < psb->m_faces.size(); ++j) + { + psb->m_faces[j].m_index = face_id; + ++face_id; + } + } + } + + const btAlignedObjectArray<btSoftBody::Node*>* getIndices() const + { + return &m_nodes; + } + + void setImplicit(bool implicit) + { + m_implicit = implicit; + } + + // Calculate the total potential energy in the system + btScalar totalEnergy(btScalar dt); + + void addLagrangeMultiplier(const TVStack& vec, TVStack& extended_vec) + { + extended_vec.resize(vec.size() + m_projection.m_lagrangeMultipliers.size()); + for (int i = 0; i < vec.size(); ++i) + { + extended_vec[i] = vec[i]; + } + int offset = vec.size(); + for (int i = 0; i < m_projection.m_lagrangeMultipliers.size(); ++i) + { + extended_vec[offset + i].setZero(); + } + } + + void addLagrangeMultiplierRHS(const TVStack& residual, const TVStack& m_dv, TVStack& extended_residual) + { + extended_residual.resize(residual.size() + m_projection.m_lagrangeMultipliers.size()); + for (int i = 0; i < residual.size(); ++i) + { + extended_residual[i] = residual[i]; + } + int offset = residual.size(); + for (int i = 0; i < m_projection.m_lagrangeMultipliers.size(); ++i) + { + const LagrangeMultiplier& lm = m_projection.m_lagrangeMultipliers[i]; + extended_residual[offset + i].setZero(); + for (int d = 0; d < lm.m_num_constraints; ++d) + { + for (int n = 0; n < lm.m_num_nodes; ++n) + { + extended_residual[offset + i][d] += lm.m_weights[n] * m_dv[lm.m_indices[n]].dot(lm.m_dirs[d]); + } + } + } + } + + void calculateContactForce(const TVStack& dv, const TVStack& rhs, TVStack& f) + { + size_t counter = 0; + for (int i = 0; i < m_softBodies.size(); ++i) + { + btSoftBody* psb = m_softBodies[i]; + for (int j = 0; j < psb->m_nodes.size(); ++j) + { + const btSoftBody::Node& node = psb->m_nodes[j]; + f[counter] = (node.m_im == 0) ? btVector3(0, 0, 0) : dv[counter] / node.m_im; + ++counter; + } + } + for (int i = 0; i < m_lf.size(); ++i) + { + // add damping matrix + m_lf[i]->addScaledDampingForceDifferential(-m_dt, dv, f); + } + counter = 0; + for (; counter < f.size(); ++counter) + { + f[counter] = rhs[counter] - f[counter]; + } + } }; #endif /* btBackwardEulerObjective_h */ diff --git a/thirdparty/bullet/BulletSoftBody/btDeformableBodySolver.cpp b/thirdparty/bullet/BulletSoftBody/btDeformableBodySolver.cpp index 132699c54f..4b11fccecb 100644 --- a/thirdparty/bullet/BulletSoftBody/btDeformableBodySolver.cpp +++ b/thirdparty/bullet/BulletSoftBody/btDeformableBodySolver.cpp @@ -18,468 +18,489 @@ #include "btDeformableBodySolver.h" #include "btSoftBodyInternals.h" #include "LinearMath/btQuickprof.h" -static const int kMaxConjugateGradientIterations = 50; +static const int kMaxConjugateGradientIterations = 300; btDeformableBodySolver::btDeformableBodySolver() -: m_numNodes(0) -, m_cg(kMaxConjugateGradientIterations) -, m_cr(kMaxConjugateGradientIterations) -, m_maxNewtonIterations(5) -, m_newtonTolerance(1e-4) -, m_lineSearch(false) -, m_useProjection(false) + : m_numNodes(0), m_cg(kMaxConjugateGradientIterations), m_cr(kMaxConjugateGradientIterations), m_maxNewtonIterations(1), m_newtonTolerance(1e-4), m_lineSearch(false), m_useProjection(false) { - m_objective = new btDeformableBackwardEulerObjective(m_softBodies, m_backupVelocity); + m_objective = new btDeformableBackwardEulerObjective(m_softBodies, m_backupVelocity); } btDeformableBodySolver::~btDeformableBodySolver() { - delete m_objective; + delete m_objective; } void btDeformableBodySolver::solveDeformableConstraints(btScalar solverdt) { - BT_PROFILE("solveDeformableConstraints"); - if (!m_implicit) - { - m_objective->computeResidual(solverdt, m_residual); - m_objective->applyDynamicFriction(m_residual); - if (m_useProjection) - { - computeStep(m_dv, m_residual); - } - else - { - TVStack rhs, x; - m_objective->addLagrangeMultiplierRHS(m_residual, m_dv, rhs); - m_objective->addLagrangeMultiplier(m_dv, x); - m_objective->m_preconditioner->reinitialize(true); - computeStep(x, rhs); - for (int i = 0; i<m_dv.size(); ++i) - { - m_dv[i] = x[i]; - } - } - updateVelocity(); - } - else - { - for (int i = 0; i < m_maxNewtonIterations; ++i) - { - updateState(); - // add the inertia term in the residual - int counter = 0; - for (int k = 0; k < m_softBodies.size(); ++k) - { - btSoftBody* psb = m_softBodies[k]; - for (int j = 0; j < psb->m_nodes.size(); ++j) - { - if (psb->m_nodes[j].m_im > 0) - { - m_residual[counter] = (-1./psb->m_nodes[j].m_im) * m_dv[counter]; - } - ++counter; - } - } - - m_objective->computeResidual(solverdt, m_residual); - if (m_objective->computeNorm(m_residual) < m_newtonTolerance && i > 0) - { - break; - } - // todo xuchenhan@: this really only needs to be calculated once - m_objective->applyDynamicFriction(m_residual); - if (m_lineSearch) - { - btScalar inner_product = computeDescentStep(m_ddv,m_residual); - btScalar alpha = 0.01, beta = 0.5; // Boyd & Vandenberghe suggested alpha between 0.01 and 0.3, beta between 0.1 to 0.8 - btScalar scale = 2; - btScalar f0 = m_objective->totalEnergy(solverdt)+kineticEnergy(), f1, f2; - backupDv(); - do { - scale *= beta; - if (scale < 1e-8) { - return; - } - updateEnergy(scale); - f1 = m_objective->totalEnergy(solverdt)+kineticEnergy(); - f2 = f0 - alpha * scale * inner_product; - } while (!(f1 < f2+SIMD_EPSILON)); // if anything here is nan then the search continues - revertDv(); - updateDv(scale); - } - else - { - computeStep(m_ddv, m_residual); - updateDv(); - } - for (int j = 0; j < m_numNodes; ++j) - { - m_ddv[j].setZero(); - m_residual[j].setZero(); - } - } - updateVelocity(); - } + BT_PROFILE("solveDeformableConstraints"); + if (!m_implicit) + { + m_objective->computeResidual(solverdt, m_residual); + m_objective->applyDynamicFriction(m_residual); + if (m_useProjection) + { + computeStep(m_dv, m_residual); + } + else + { + TVStack rhs, x; + m_objective->addLagrangeMultiplierRHS(m_residual, m_dv, rhs); + m_objective->addLagrangeMultiplier(m_dv, x); + m_objective->m_preconditioner->reinitialize(true); + computeStep(x, rhs); + for (int i = 0; i < m_dv.size(); ++i) + { + m_dv[i] = x[i]; + } + } + updateVelocity(); + } + else + { + for (int i = 0; i < m_maxNewtonIterations; ++i) + { + updateState(); + // add the inertia term in the residual + int counter = 0; + for (int k = 0; k < m_softBodies.size(); ++k) + { + btSoftBody* psb = m_softBodies[k]; + for (int j = 0; j < psb->m_nodes.size(); ++j) + { + if (psb->m_nodes[j].m_im > 0) + { + m_residual[counter] = (-1. / psb->m_nodes[j].m_im) * m_dv[counter]; + } + ++counter; + } + } + + m_objective->computeResidual(solverdt, m_residual); + if (m_objective->computeNorm(m_residual) < m_newtonTolerance && i > 0) + { + break; + } + // todo xuchenhan@: this really only needs to be calculated once + m_objective->applyDynamicFriction(m_residual); + if (m_lineSearch) + { + btScalar inner_product = computeDescentStep(m_ddv, m_residual); + btScalar alpha = 0.01, beta = 0.5; // Boyd & Vandenberghe suggested alpha between 0.01 and 0.3, beta between 0.1 to 0.8 + btScalar scale = 2; + btScalar f0 = m_objective->totalEnergy(solverdt) + kineticEnergy(), f1, f2; + backupDv(); + do + { + scale *= beta; + if (scale < 1e-8) + { + return; + } + updateEnergy(scale); + f1 = m_objective->totalEnergy(solverdt) + kineticEnergy(); + f2 = f0 - alpha * scale * inner_product; + } while (!(f1 < f2 + SIMD_EPSILON)); // if anything here is nan then the search continues + revertDv(); + updateDv(scale); + } + else + { + computeStep(m_ddv, m_residual); + updateDv(); + } + for (int j = 0; j < m_numNodes; ++j) + { + m_ddv[j].setZero(); + m_residual[j].setZero(); + } + } + updateVelocity(); + } } btScalar btDeformableBodySolver::kineticEnergy() { - btScalar ke = 0; - for (int i = 0; i < m_softBodies.size();++i) - { - btSoftBody* psb = m_softBodies[i]; - for (int j = 0; j < psb->m_nodes.size();++j) - { - btSoftBody::Node& node = psb->m_nodes[j]; - if (node.m_im > 0) - { - ke += m_dv[node.index].length2() * 0.5 / node.m_im; - } - } - } - return ke; + btScalar ke = 0; + for (int i = 0; i < m_softBodies.size(); ++i) + { + btSoftBody* psb = m_softBodies[i]; + for (int j = 0; j < psb->m_nodes.size(); ++j) + { + btSoftBody::Node& node = psb->m_nodes[j]; + if (node.m_im > 0) + { + ke += m_dv[node.index].length2() * 0.5 / node.m_im; + } + } + } + return ke; } void btDeformableBodySolver::backupDv() { - m_backup_dv.resize(m_dv.size()); - for (int i = 0; i<m_backup_dv.size(); ++i) - { - m_backup_dv[i] = m_dv[i]; - } + m_backup_dv.resize(m_dv.size()); + for (int i = 0; i < m_backup_dv.size(); ++i) + { + m_backup_dv[i] = m_dv[i]; + } } void btDeformableBodySolver::revertDv() { - for (int i = 0; i<m_backup_dv.size(); ++i) - { - m_dv[i] = m_backup_dv[i]; - } + for (int i = 0; i < m_backup_dv.size(); ++i) + { + m_dv[i] = m_backup_dv[i]; + } } void btDeformableBodySolver::updateEnergy(btScalar scale) { - for (int i = 0; i<m_dv.size(); ++i) - { - m_dv[i] = m_backup_dv[i] + scale * m_ddv[i]; - } - updateState(); + for (int i = 0; i < m_dv.size(); ++i) + { + m_dv[i] = m_backup_dv[i] + scale * m_ddv[i]; + } + updateState(); } - btScalar btDeformableBodySolver::computeDescentStep(TVStack& ddv, const TVStack& residual, bool verbose) { - m_cg.solve(*m_objective, ddv, residual, false); - btScalar inner_product = m_cg.dot(residual, m_ddv); - btScalar res_norm = m_objective->computeNorm(residual); - btScalar tol = 1e-5 * res_norm * m_objective->computeNorm(m_ddv); - if (inner_product < -tol) - { - if (verbose) - { - std::cout << "Looking backwards!" << std::endl; - } - for (int i = 0; i < m_ddv.size();++i) - { - m_ddv[i] = -m_ddv[i]; - } - inner_product = -inner_product; - } - else if (std::abs(inner_product) < tol) - { - if (verbose) - { - std::cout << "Gradient Descent!" << std::endl; - } - btScalar scale = m_objective->computeNorm(m_ddv) / res_norm; - for (int i = 0; i < m_ddv.size();++i) - { - m_ddv[i] = scale * residual[i]; - } - inner_product = scale * res_norm * res_norm; - } - return inner_product; + m_cg.solve(*m_objective, ddv, residual, false); + btScalar inner_product = m_cg.dot(residual, m_ddv); + btScalar res_norm = m_objective->computeNorm(residual); + btScalar tol = 1e-5 * res_norm * m_objective->computeNorm(m_ddv); + if (inner_product < -tol) + { + if (verbose) + { + std::cout << "Looking backwards!" << std::endl; + } + for (int i = 0; i < m_ddv.size(); ++i) + { + m_ddv[i] = -m_ddv[i]; + } + inner_product = -inner_product; + } + else if (std::abs(inner_product) < tol) + { + if (verbose) + { + std::cout << "Gradient Descent!" << std::endl; + } + btScalar scale = m_objective->computeNorm(m_ddv) / res_norm; + for (int i = 0; i < m_ddv.size(); ++i) + { + m_ddv[i] = scale * residual[i]; + } + inner_product = scale * res_norm * res_norm; + } + return inner_product; } void btDeformableBodySolver::updateState() { - updateVelocity(); - updateTempPosition(); + updateVelocity(); + updateTempPosition(); } void btDeformableBodySolver::updateDv(btScalar scale) { - for (int i = 0; i < m_numNodes; ++i) - { - m_dv[i] += scale * m_ddv[i]; - } + for (int i = 0; i < m_numNodes; ++i) + { + m_dv[i] += scale * m_ddv[i]; + } } void btDeformableBodySolver::computeStep(TVStack& ddv, const TVStack& residual) { - if (m_useProjection) - m_cg.solve(*m_objective, ddv, residual, false); - else - m_cr.solve(*m_objective, ddv, residual, false); + if (m_useProjection) + m_cg.solve(*m_objective, ddv, residual, false); + else + m_cr.solve(*m_objective, ddv, residual, false); } -void btDeformableBodySolver::reinitialize(const btAlignedObjectArray<btSoftBody *>& softBodies, btScalar dt) +void btDeformableBodySolver::reinitialize(const btAlignedObjectArray<btSoftBody*>& softBodies, btScalar dt) { - m_softBodies.copyFromArray(softBodies); - bool nodeUpdated = updateNodes(); - - if (nodeUpdated) - { - m_dv.resize(m_numNodes, btVector3(0,0,0)); - m_ddv.resize(m_numNodes, btVector3(0,0,0)); - m_residual.resize(m_numNodes, btVector3(0,0,0)); - m_backupVelocity.resize(m_numNodes, btVector3(0,0,0)); - } - - // need to setZero here as resize only set value for newly allocated items - for (int i = 0; i < m_numNodes; ++i) - { - m_dv[i].setZero(); - m_ddv[i].setZero(); - m_residual[i].setZero(); - } - - m_dt = dt; - m_objective->reinitialize(nodeUpdated, dt); - updateSoftBodies(); -} + m_softBodies.copyFromArray(softBodies); + bool nodeUpdated = updateNodes(); -void btDeformableBodySolver::setConstraints(const btContactSolverInfo& infoGlobal) -{ - BT_PROFILE("setConstraint"); - m_objective->setConstraints(infoGlobal); + if (nodeUpdated) + { + m_dv.resize(m_numNodes, btVector3(0, 0, 0)); + m_ddv.resize(m_numNodes, btVector3(0, 0, 0)); + m_residual.resize(m_numNodes, btVector3(0, 0, 0)); + m_backupVelocity.resize(m_numNodes, btVector3(0, 0, 0)); + } + + // need to setZero here as resize only set value for newly allocated items + for (int i = 0; i < m_numNodes; ++i) + { + m_dv[i].setZero(); + m_ddv[i].setZero(); + m_residual[i].setZero(); + } + + if (dt > 0) + { + m_dt = dt; + } + m_objective->reinitialize(nodeUpdated, dt); + updateSoftBodies(); } -btScalar btDeformableBodySolver::solveContactConstraints(btCollisionObject** deformableBodies,int numDeformableBodies, const btContactSolverInfo& infoGlobal) +void btDeformableBodySolver::setConstraints(const btContactSolverInfo& infoGlobal) { - BT_PROFILE("solveContactConstraints"); - btScalar maxSquaredResidual = m_objective->m_projection.update(deformableBodies,numDeformableBodies, infoGlobal); - return maxSquaredResidual; + BT_PROFILE("setConstraint"); + m_objective->setConstraints(infoGlobal); } -void btDeformableBodySolver::splitImpulseSetup(const btContactSolverInfo& infoGlobal) +btScalar btDeformableBodySolver::solveContactConstraints(btCollisionObject** deformableBodies, int numDeformableBodies, const btContactSolverInfo& infoGlobal) { - m_objective->m_projection.splitImpulseSetup(infoGlobal); + BT_PROFILE("solveContactConstraints"); + btScalar maxSquaredResidual = m_objective->m_projection.update(deformableBodies, numDeformableBodies, infoGlobal); + return maxSquaredResidual; } void btDeformableBodySolver::updateVelocity() { - int counter = 0; - for (int i = 0; i < m_softBodies.size(); ++i) - { - btSoftBody* psb = m_softBodies[i]; - psb->m_maxSpeedSquared = 0; - if (!psb->isActive()) - { - counter += psb->m_nodes.size(); - continue; - } - for (int j = 0; j < psb->m_nodes.size(); ++j) - { - // set NaN to zero; - if (m_dv[counter] != m_dv[counter]) - { - m_dv[counter].setZero(); - } - psb->m_nodes[j].m_v = m_backupVelocity[counter]+m_dv[counter]; - psb->m_maxSpeedSquared = btMax(psb->m_maxSpeedSquared, psb->m_nodes[j].m_v.length2()); - ++counter; - } - } + int counter = 0; + for (int i = 0; i < m_softBodies.size(); ++i) + { + btSoftBody* psb = m_softBodies[i]; + psb->m_maxSpeedSquared = 0; + if (!psb->isActive()) + { + counter += psb->m_nodes.size(); + continue; + } + for (int j = 0; j < psb->m_nodes.size(); ++j) + { + // set NaN to zero; + if (m_dv[counter] != m_dv[counter]) + { + m_dv[counter].setZero(); + } + if (m_implicit) + { + psb->m_nodes[j].m_v = m_backupVelocity[counter] + m_dv[counter]; + } + else + { + psb->m_nodes[j].m_v = m_backupVelocity[counter] + m_dv[counter] - psb->m_nodes[j].m_splitv; + } + psb->m_maxSpeedSquared = btMax(psb->m_maxSpeedSquared, psb->m_nodes[j].m_v.length2()); + ++counter; + } + } } void btDeformableBodySolver::updateTempPosition() { - int counter = 0; - for (int i = 0; i < m_softBodies.size(); ++i) - { - btSoftBody* psb = m_softBodies[i]; - if (!psb->isActive()) - { - counter += psb->m_nodes.size(); - continue; - } - for (int j = 0; j < psb->m_nodes.size(); ++j) - { - psb->m_nodes[j].m_q = psb->m_nodes[j].m_x + m_dt * psb->m_nodes[j].m_v; - ++counter; - } - psb->updateDeformation(); - } + int counter = 0; + for (int i = 0; i < m_softBodies.size(); ++i) + { + btSoftBody* psb = m_softBodies[i]; + if (!psb->isActive()) + { + counter += psb->m_nodes.size(); + continue; + } + for (int j = 0; j < psb->m_nodes.size(); ++j) + { + psb->m_nodes[j].m_q = psb->m_nodes[j].m_x + m_dt * (psb->m_nodes[j].m_v + psb->m_nodes[j].m_splitv); + ++counter; + } + psb->updateDeformation(); + } } void btDeformableBodySolver::backupVelocity() { - int counter = 0; - for (int i = 0; i < m_softBodies.size(); ++i) - { - btSoftBody* psb = m_softBodies[i]; - for (int j = 0; j < psb->m_nodes.size(); ++j) - { - m_backupVelocity[counter++] = psb->m_nodes[j].m_v; - } - } + int counter = 0; + for (int i = 0; i < m_softBodies.size(); ++i) + { + btSoftBody* psb = m_softBodies[i]; + for (int j = 0; j < psb->m_nodes.size(); ++j) + { + m_backupVelocity[counter++] = psb->m_nodes[j].m_v; + } + } } void btDeformableBodySolver::setupDeformableSolve(bool implicit) { - int counter = 0; - for (int i = 0; i < m_softBodies.size(); ++i) - { - btSoftBody* psb = m_softBodies[i]; - if (!psb->isActive()) - { - counter += psb->m_nodes.size(); - continue; - } - for (int j = 0; j < psb->m_nodes.size(); ++j) - { - if (implicit) - { - if ((psb->m_nodes[j].m_v - m_backupVelocity[counter]).norm() < SIMD_EPSILON) - m_dv[counter] = psb->m_nodes[j].m_v - m_backupVelocity[counter]; - else - m_dv[counter] = psb->m_nodes[j].m_v - psb->m_nodes[j].m_vn; - m_backupVelocity[counter] = psb->m_nodes[j].m_vn; - } - else - { - m_dv[counter] = psb->m_nodes[j].m_v - m_backupVelocity[counter]; - } - psb->m_nodes[j].m_v = m_backupVelocity[counter]; - ++counter; - } - } + int counter = 0; + for (int i = 0; i < m_softBodies.size(); ++i) + { + btSoftBody* psb = m_softBodies[i]; + if (!psb->isActive()) + { + counter += psb->m_nodes.size(); + continue; + } + for (int j = 0; j < psb->m_nodes.size(); ++j) + { + if (implicit) + { + // setting the initial guess for newton, need m_dv = v_{n+1} - v_n for dofs that are in constraint. + if (psb->m_nodes[j].m_v == m_backupVelocity[counter]) + m_dv[counter].setZero(); + else + m_dv[counter] = psb->m_nodes[j].m_v - psb->m_nodes[j].m_vn; + m_backupVelocity[counter] = psb->m_nodes[j].m_vn; + } + else + { + m_dv[counter] = psb->m_nodes[j].m_v + psb->m_nodes[j].m_splitv - m_backupVelocity[counter]; + } + psb->m_nodes[j].m_v = m_backupVelocity[counter]; + ++counter; + } + } } void btDeformableBodySolver::revertVelocity() { - int counter = 0; - for (int i = 0; i < m_softBodies.size(); ++i) - { - btSoftBody* psb = m_softBodies[i]; - for (int j = 0; j < psb->m_nodes.size(); ++j) - { - psb->m_nodes[j].m_v = m_backupVelocity[counter++]; - } - } + int counter = 0; + for (int i = 0; i < m_softBodies.size(); ++i) + { + btSoftBody* psb = m_softBodies[i]; + for (int j = 0; j < psb->m_nodes.size(); ++j) + { + psb->m_nodes[j].m_v = m_backupVelocity[counter++]; + } + } } bool btDeformableBodySolver::updateNodes() { - int numNodes = 0; - for (int i = 0; i < m_softBodies.size(); ++i) - numNodes += m_softBodies[i]->m_nodes.size(); - if (numNodes != m_numNodes) - { - m_numNodes = numNodes; - return true; - } - return false; + int numNodes = 0; + for (int i = 0; i < m_softBodies.size(); ++i) + numNodes += m_softBodies[i]->m_nodes.size(); + if (numNodes != m_numNodes) + { + m_numNodes = numNodes; + return true; + } + return false; } - void btDeformableBodySolver::predictMotion(btScalar solverdt) { - // apply explicit forces to velocity - m_objective->applyExplicitForce(m_residual); - for (int i = 0; i < m_softBodies.size(); ++i) - { - btSoftBody *psb = m_softBodies[i]; - - if (psb->isActive()) - { - // predict motion for collision detection - predictDeformableMotion(psb, solverdt); - } - } + // apply explicit forces to velocity + if (m_implicit) + { + for (int i = 0; i < m_softBodies.size(); ++i) + { + btSoftBody* psb = m_softBodies[i]; + if (psb->isActive()) + { + for (int j = 0; j < psb->m_nodes.size(); ++j) + { + psb->m_nodes[j].m_q = psb->m_nodes[j].m_x + psb->m_nodes[j].m_v * solverdt; + } + } + } + } + m_objective->applyExplicitForce(m_residual); + for (int i = 0; i < m_softBodies.size(); ++i) + { + btSoftBody* psb = m_softBodies[i]; + + if (psb->isActive()) + { + // predict motion for collision detection + predictDeformableMotion(psb, solverdt); + } + } } void btDeformableBodySolver::predictDeformableMotion(btSoftBody* psb, btScalar dt) { - BT_PROFILE("btDeformableBodySolver::predictDeformableMotion"); - int i, ni; - - /* Update */ - if (psb->m_bUpdateRtCst) - { - psb->m_bUpdateRtCst = false; - psb->updateConstants(); - psb->m_fdbvt.clear(); - if (psb->m_cfg.collisions & btSoftBody::fCollision::SDF_RD) - { - psb->initializeFaceTree(); - } - } - - /* Prepare */ - psb->m_sst.sdt = dt * psb->m_cfg.timescale; - psb->m_sst.isdt = 1 / psb->m_sst.sdt; - psb->m_sst.velmrg = psb->m_sst.sdt * 3; - psb->m_sst.radmrg = psb->getCollisionShape()->getMargin(); - psb->m_sst.updmrg = psb->m_sst.radmrg * (btScalar)0.25; - /* Bounds */ - psb->updateBounds(); - - /* Integrate */ - // do not allow particles to move more than the bounding box size - btScalar max_v = (psb->m_bounds[1]-psb->m_bounds[0]).norm() / dt; - for (i = 0, ni = psb->m_nodes.size(); i < ni; ++i) - { - btSoftBody::Node& n = psb->m_nodes[i]; - // apply drag - n.m_v *= (1 - psb->m_cfg.drag); - // scale velocity back - if (n.m_v.norm() > max_v) - { - n.m_v.safeNormalize(); - n.m_v *= max_v; - } - n.m_q = n.m_x + n.m_v * dt; - n.m_penetration = 0; - } - - /* Nodes */ - psb->updateNodeTree(true, true); - if (!psb->m_fdbvt.empty()) - { - psb->updateFaceTree(true, true); - } - /* Clear contacts */ - psb->m_nodeRigidContacts.resize(0); - psb->m_faceRigidContacts.resize(0); - psb->m_faceNodeContacts.resize(0); - /* Optimize dbvt's */ -// psb->m_ndbvt.optimizeIncremental(1); -// psb->m_fdbvt.optimizeIncremental(1); -} + BT_PROFILE("btDeformableBodySolver::predictDeformableMotion"); + int i, ni; + + /* Update */ + if (psb->m_bUpdateRtCst) + { + psb->m_bUpdateRtCst = false; + psb->updateConstants(); + psb->m_fdbvt.clear(); + if (psb->m_cfg.collisions & btSoftBody::fCollision::SDF_RD) + { + psb->initializeFaceTree(); + } + } + /* Prepare */ + psb->m_sst.sdt = dt * psb->m_cfg.timescale; + psb->m_sst.isdt = 1 / psb->m_sst.sdt; + psb->m_sst.velmrg = psb->m_sst.sdt * 3; + psb->m_sst.radmrg = psb->getCollisionShape()->getMargin(); + psb->m_sst.updmrg = psb->m_sst.radmrg * (btScalar)0.25; + /* Bounds */ + psb->updateBounds(); + + /* Integrate */ + // do not allow particles to move more than the bounding box size + btScalar max_v = (psb->m_bounds[1] - psb->m_bounds[0]).norm() / dt; + for (i = 0, ni = psb->m_nodes.size(); i < ni; ++i) + { + btSoftBody::Node& n = psb->m_nodes[i]; + // apply drag + n.m_v *= (1 - psb->m_cfg.drag); + // scale velocity back + if (m_implicit) + { + n.m_q = n.m_x; + } + else + { + if (n.m_v.norm() > max_v) + { + n.m_v.safeNormalize(); + n.m_v *= max_v; + } + n.m_q = n.m_x + n.m_v * dt; + } + n.m_splitv.setZero(); + n.m_constrained = false; + } + + /* Nodes */ + psb->updateNodeTree(true, true); + if (!psb->m_fdbvt.empty()) + { + psb->updateFaceTree(true, true); + } + /* Clear contacts */ + psb->m_nodeRigidContacts.resize(0); + psb->m_faceRigidContacts.resize(0); + psb->m_faceNodeContacts.resize(0); + /* Optimize dbvt's */ + // psb->m_ndbvt.optimizeIncremental(1); + // psb->m_fdbvt.optimizeIncremental(1); +} void btDeformableBodySolver::updateSoftBodies() { - BT_PROFILE("updateSoftBodies"); - for (int i = 0; i < m_softBodies.size(); i++) - { - btSoftBody *psb = (btSoftBody *)m_softBodies[i]; - if (psb->isActive()) - { - psb->updateNormals(); - } - } + BT_PROFILE("updateSoftBodies"); + for (int i = 0; i < m_softBodies.size(); i++) + { + btSoftBody* psb = (btSoftBody*)m_softBodies[i]; + if (psb->isActive()) + { + psb->updateNormals(); + } + } } void btDeformableBodySolver::setImplicit(bool implicit) { - m_implicit = implicit; - m_objective->setImplicit(implicit); + m_implicit = implicit; + m_objective->setImplicit(implicit); } void btDeformableBodySolver::setLineSearch(bool lineSearch) { - m_lineSearch = lineSearch; + m_lineSearch = lineSearch; } diff --git a/thirdparty/bullet/BulletSoftBody/btDeformableBodySolver.h b/thirdparty/bullet/BulletSoftBody/btDeformableBodySolver.h index d4e5f4c603..ae674d6e89 100644 --- a/thirdparty/bullet/BulletSoftBody/btDeformableBodySolver.h +++ b/thirdparty/bullet/BulletSoftBody/btDeformableBodySolver.h @@ -16,7 +16,6 @@ #ifndef BT_DEFORMABLE_BODY_SOLVERS_H #define BT_DEFORMABLE_BODY_SOLVERS_H - #include "btSoftBodySolvers.h" #include "btDeformableBackwardEulerObjective.h" #include "btDeformableMultiBodyDynamicsWorld.h" @@ -30,133 +29,132 @@ class btDeformableMultiBodyDynamicsWorld; class btDeformableBodySolver : public btSoftBodySolver { - typedef btAlignedObjectArray<btVector3> TVStack; + typedef btAlignedObjectArray<btVector3> TVStack; + protected: - int m_numNodes; // total number of deformable body nodes - TVStack m_dv; // v_{n+1} - v_n - TVStack m_backup_dv; // backed up dv - TVStack m_ddv; // incremental dv - TVStack m_residual; // rhs of the linear solve - btAlignedObjectArray<btSoftBody *> m_softBodies; // all deformable bodies - TVStack m_backupVelocity; // backed up v, equals v_n for implicit, equals v_{n+1}^* for explicit - btScalar m_dt; // dt - btConjugateGradient<btDeformableBackwardEulerObjective> m_cg; // CG solver - btConjugateResidual<btDeformableBackwardEulerObjective> m_cr; // CR solver - bool m_implicit; // use implicit scheme if true, explicit scheme if false - int m_maxNewtonIterations; // max number of newton iterations - btScalar m_newtonTolerance; // stop newton iterations if f(x) < m_newtonTolerance - bool m_lineSearch; // If true, use newton's method with line search under implicit scheme + int m_numNodes; // total number of deformable body nodes + TVStack m_dv; // v_{n+1} - v_n + TVStack m_backup_dv; // backed up dv + TVStack m_ddv; // incremental dv + TVStack m_residual; // rhs of the linear solve + btAlignedObjectArray<btSoftBody*> m_softBodies; // all deformable bodies + TVStack m_backupVelocity; // backed up v, equals v_n for implicit, equals v_{n+1}^* for explicit + btScalar m_dt; // dt + btConjugateGradient<btDeformableBackwardEulerObjective> m_cg; // CG solver + btConjugateResidual<btDeformableBackwardEulerObjective> m_cr; // CR solver + bool m_implicit; // use implicit scheme if true, explicit scheme if false + int m_maxNewtonIterations; // max number of newton iterations + btScalar m_newtonTolerance; // stop newton iterations if f(x) < m_newtonTolerance + bool m_lineSearch; // If true, use newton's method with line search under implicit scheme public: - // handles data related to objective function - btDeformableBackwardEulerObjective* m_objective; - bool m_useProjection; - - btDeformableBodySolver(); - - virtual ~btDeformableBodySolver(); - - virtual SolverTypes getSolverType() const - { - return DEFORMABLE_SOLVER; - } - - // update soft body normals - virtual void updateSoftBodies(); - - virtual btScalar solveContactConstraints(btCollisionObject** deformableBodies,int numDeformableBodies, const btContactSolverInfo& infoGlobal); - - // solve the momentum equation - virtual void solveDeformableConstraints(btScalar solverdt); - - // set up the position error in split impulse - void splitImpulseSetup(const btContactSolverInfo& infoGlobal); - - // resize/clear data structures - void reinitialize(const btAlignedObjectArray<btSoftBody *>& softBodies, btScalar dt); - - // set up contact constraints - void setConstraints(const btContactSolverInfo& infoGlobal); - - // add in elastic forces and gravity to obtain v_{n+1}^* and calls predictDeformableMotion - virtual void predictMotion(btScalar solverdt); - - // move to temporary position x_{n+1}^* = x_n + dt * v_{n+1}^* - // x_{n+1}^* is stored in m_q - void predictDeformableMotion(btSoftBody* psb, btScalar dt); - - // save the current velocity to m_backupVelocity - void backupVelocity(); - - // set m_dv and m_backupVelocity to desired value to prepare for momentum solve - void setupDeformableSolve(bool implicit); - - // set the current velocity to that backed up in m_backupVelocity - void revertVelocity(); - - // set velocity to m_dv + m_backupVelocity - void updateVelocity(); - - // update the node count - bool updateNodes(); - - // calculate the change in dv resulting from the momentum solve - void computeStep(TVStack& ddv, const TVStack& residual); - - // calculate the change in dv resulting from the momentum solve when line search is turned on - btScalar computeDescentStep(TVStack& ddv, const TVStack& residual, bool verbose=false); - - virtual void copySoftBodyToVertexBuffer(const btSoftBody *const softBody, btVertexBufferDescriptor *vertexBuffer) {} - - // process collision between deformable and rigid - virtual void processCollision(btSoftBody * softBody, const btCollisionObjectWrapper * collisionObjectWrap) - { - softBody->defaultCollisionHandler(collisionObjectWrap); - } - - // process collision between deformable and deformable - virtual void processCollision(btSoftBody * softBody, btSoftBody * otherSoftBody) { - softBody->defaultCollisionHandler(otherSoftBody); - } - - // If true, implicit time stepping scheme is used. - // Otherwise, explicit time stepping scheme is used - void setImplicit(bool implicit); - - // If true, newton's method with line search is used when implicit time stepping scheme is turned on - void setLineSearch(bool lineSearch); - - // set temporary position x^* = x_n + dt * v - // update the deformation gradient at position x^* - void updateState(); - - // set dv = dv + scale * ddv - void updateDv(btScalar scale = 1); - - // set temporary position x^* = x_n + dt * v^* - void updateTempPosition(); - - // save the current dv to m_backup_dv; - void backupDv(); - - // set dv to the backed-up value - void revertDv(); - - // set dv = dv + scale * ddv - // set v^* = v_n + dv - // set temporary position x^* = x_n + dt * v^* - // update the deformation gradient at position x^* - void updateEnergy(btScalar scale); - - // calculates the appropriately scaled kinetic energy in the system, which is - // 1/2 * dv^T * M * dv - // used in line search - btScalar kineticEnergy(); - - // unused functions - virtual void optimize(btAlignedObjectArray<btSoftBody *> &softBodies, bool forceUpdate = false){} - virtual void solveConstraints(btScalar dt){} - virtual bool checkInitialized(){return true;} - virtual void copyBackToSoftBodies(bool bMove = true) {} + // handles data related to objective function + btDeformableBackwardEulerObjective* m_objective; + bool m_useProjection; + + btDeformableBodySolver(); + + virtual ~btDeformableBodySolver(); + + virtual SolverTypes getSolverType() const + { + return DEFORMABLE_SOLVER; + } + + // update soft body normals + virtual void updateSoftBodies(); + + virtual btScalar solveContactConstraints(btCollisionObject** deformableBodies, int numDeformableBodies, const btContactSolverInfo& infoGlobal); + + // solve the momentum equation + virtual void solveDeformableConstraints(btScalar solverdt); + + // resize/clear data structures + void reinitialize(const btAlignedObjectArray<btSoftBody*>& softBodies, btScalar dt); + + // set up contact constraints + void setConstraints(const btContactSolverInfo& infoGlobal); + + // add in elastic forces and gravity to obtain v_{n+1}^* and calls predictDeformableMotion + virtual void predictMotion(btScalar solverdt); + + // move to temporary position x_{n+1}^* = x_n + dt * v_{n+1}^* + // x_{n+1}^* is stored in m_q + void predictDeformableMotion(btSoftBody* psb, btScalar dt); + + // save the current velocity to m_backupVelocity + void backupVelocity(); + + // set m_dv and m_backupVelocity to desired value to prepare for momentum solve + void setupDeformableSolve(bool implicit); + + // set the current velocity to that backed up in m_backupVelocity + void revertVelocity(); + + // set velocity to m_dv + m_backupVelocity + void updateVelocity(); + + // update the node count + bool updateNodes(); + + // calculate the change in dv resulting from the momentum solve + void computeStep(TVStack& ddv, const TVStack& residual); + + // calculate the change in dv resulting from the momentum solve when line search is turned on + btScalar computeDescentStep(TVStack& ddv, const TVStack& residual, bool verbose = false); + + virtual void copySoftBodyToVertexBuffer(const btSoftBody* const softBody, btVertexBufferDescriptor* vertexBuffer) {} + + // process collision between deformable and rigid + virtual void processCollision(btSoftBody* softBody, const btCollisionObjectWrapper* collisionObjectWrap) + { + softBody->defaultCollisionHandler(collisionObjectWrap); + } + + // process collision between deformable and deformable + virtual void processCollision(btSoftBody* softBody, btSoftBody* otherSoftBody) + { + softBody->defaultCollisionHandler(otherSoftBody); + } + + // If true, implicit time stepping scheme is used. + // Otherwise, explicit time stepping scheme is used + void setImplicit(bool implicit); + + // If true, newton's method with line search is used when implicit time stepping scheme is turned on + void setLineSearch(bool lineSearch); + + // set temporary position x^* = x_n + dt * v + // update the deformation gradient at position x^* + void updateState(); + + // set dv = dv + scale * ddv + void updateDv(btScalar scale = 1); + + // set temporary position x^* = x_n + dt * v^* + void updateTempPosition(); + + // save the current dv to m_backup_dv; + void backupDv(); + + // set dv to the backed-up value + void revertDv(); + + // set dv = dv + scale * ddv + // set v^* = v_n + dv + // set temporary position x^* = x_n + dt * v^* + // update the deformation gradient at position x^* + void updateEnergy(btScalar scale); + + // calculates the appropriately scaled kinetic energy in the system, which is + // 1/2 * dv^T * M * dv + // used in line search + btScalar kineticEnergy(); + + // unused functions + virtual void optimize(btAlignedObjectArray<btSoftBody*>& softBodies, bool forceUpdate = false) {} + virtual void solveConstraints(btScalar dt) {} + virtual bool checkInitialized() { return true; } + virtual void copyBackToSoftBodies(bool bMove = true) {} }; #endif /* btDeformableBodySolver_h */ diff --git a/thirdparty/bullet/BulletSoftBody/btDeformableContactConstraint.cpp b/thirdparty/bullet/BulletSoftBody/btDeformableContactConstraint.cpp index 2864446de6..09398d79a5 100644 --- a/thirdparty/bullet/BulletSoftBody/btDeformableContactConstraint.cpp +++ b/thirdparty/bullet/BulletSoftBody/btDeformableContactConstraint.cpp @@ -16,387 +16,503 @@ #include "btDeformableContactConstraint.h" /* ================ Deformable Node Anchor =================== */ btDeformableNodeAnchorConstraint::btDeformableNodeAnchorConstraint(const btSoftBody::DeformableNodeRigidAnchor& a, const btContactSolverInfo& infoGlobal) -: m_anchor(&a) -, btDeformableContactConstraint(a.m_cti.m_normal, infoGlobal) + : m_anchor(&a), btDeformableContactConstraint(a.m_cti.m_normal, infoGlobal) { } btDeformableNodeAnchorConstraint::btDeformableNodeAnchorConstraint(const btDeformableNodeAnchorConstraint& other) -: m_anchor(other.m_anchor) -, btDeformableContactConstraint(other) + : m_anchor(other.m_anchor), btDeformableContactConstraint(other) { } btVector3 btDeformableNodeAnchorConstraint::getVa() const { - const btSoftBody::sCti& cti = m_anchor->m_cti; - btVector3 va(0, 0, 0); - if (cti.m_colObj->hasContactResponse()) - { - btRigidBody* rigidCol = 0; - btMultiBodyLinkCollider* multibodyLinkCol = 0; - - // grab the velocity of the rigid body - if (cti.m_colObj->getInternalType() == btCollisionObject::CO_RIGID_BODY) - { - rigidCol = (btRigidBody*)btRigidBody::upcast(cti.m_colObj); - va = rigidCol ? (rigidCol->getVelocityInLocalPoint(m_anchor->m_c1)) : btVector3(0, 0, 0); - } - else if (cti.m_colObj->getInternalType() == btCollisionObject::CO_FEATHERSTONE_LINK) - { - multibodyLinkCol = (btMultiBodyLinkCollider*)btMultiBodyLinkCollider::upcast(cti.m_colObj); - if (multibodyLinkCol) - { - const int ndof = multibodyLinkCol->m_multiBody->getNumDofs() + 6; - const btScalar* J_n = &m_anchor->jacobianData_normal.m_jacobians[0]; - const btScalar* J_t1 = &m_anchor->jacobianData_t1.m_jacobians[0]; - const btScalar* J_t2 = &m_anchor->jacobianData_t2.m_jacobians[0]; - const btScalar* local_v = multibodyLinkCol->m_multiBody->getVelocityVector(); - const btScalar* local_dv = multibodyLinkCol->m_multiBody->getDeltaVelocityVector(); - // add in the normal component of the va - btScalar vel = 0.0; - for (int k = 0; k < ndof; ++k) - { - vel += (local_v[k]+local_dv[k]) * J_n[k]; - } - va = cti.m_normal * vel; - // add in the tangential components of the va - vel = 0.0; - for (int k = 0; k < ndof; ++k) - { - vel += (local_v[k]+local_dv[k]) * J_t1[k]; - } - va += m_anchor->t1 * vel; - vel = 0.0; - for (int k = 0; k < ndof; ++k) - { - vel += (local_v[k]+local_dv[k]) * J_t2[k]; - } - va += m_anchor->t2 * vel; - } - } - } - return va; + const btSoftBody::sCti& cti = m_anchor->m_cti; + btVector3 va(0, 0, 0); + if (cti.m_colObj->hasContactResponse()) + { + btRigidBody* rigidCol = 0; + btMultiBodyLinkCollider* multibodyLinkCol = 0; + + // grab the velocity of the rigid body + if (cti.m_colObj->getInternalType() == btCollisionObject::CO_RIGID_BODY) + { + rigidCol = (btRigidBody*)btRigidBody::upcast(cti.m_colObj); + va = rigidCol ? (rigidCol->getVelocityInLocalPoint(m_anchor->m_c1)) : btVector3(0, 0, 0); + } + else if (cti.m_colObj->getInternalType() == btCollisionObject::CO_FEATHERSTONE_LINK) + { + multibodyLinkCol = (btMultiBodyLinkCollider*)btMultiBodyLinkCollider::upcast(cti.m_colObj); + if (multibodyLinkCol) + { + const int ndof = multibodyLinkCol->m_multiBody->getNumDofs() + 6; + const btScalar* J_n = &m_anchor->jacobianData_normal.m_jacobians[0]; + const btScalar* J_t1 = &m_anchor->jacobianData_t1.m_jacobians[0]; + const btScalar* J_t2 = &m_anchor->jacobianData_t2.m_jacobians[0]; + const btScalar* local_v = multibodyLinkCol->m_multiBody->getVelocityVector(); + const btScalar* local_dv = multibodyLinkCol->m_multiBody->getDeltaVelocityVector(); + // add in the normal component of the va + btScalar vel = 0.0; + for (int k = 0; k < ndof; ++k) + { + vel += (local_v[k] + local_dv[k]) * J_n[k]; + } + va = cti.m_normal * vel; + // add in the tangential components of the va + vel = 0.0; + for (int k = 0; k < ndof; ++k) + { + vel += (local_v[k] + local_dv[k]) * J_t1[k]; + } + va += m_anchor->t1 * vel; + vel = 0.0; + for (int k = 0; k < ndof; ++k) + { + vel += (local_v[k] + local_dv[k]) * J_t2[k]; + } + va += m_anchor->t2 * vel; + } + } + } + return va; } btScalar btDeformableNodeAnchorConstraint::solveConstraint(const btContactSolverInfo& infoGlobal) { - const btSoftBody::sCti& cti = m_anchor->m_cti; - btVector3 va = getVa(); - btVector3 vb = getVb(); - btVector3 vr = (vb - va); - // + (m_anchor->m_node->m_x - cti.m_colObj->getWorldTransform() * m_anchor->m_local) * 10.0 - const btScalar dn = btDot(vr, vr); - // dn is the normal component of velocity diffrerence. Approximates the residual. // todo xuchenhan@: this prob needs to be scaled by dt - btScalar residualSquare = dn*dn; - btVector3 impulse = m_anchor->m_c0 * vr; - // apply impulse to deformable nodes involved and change their velocities - applyImpulse(impulse); - - // apply impulse to the rigid/multibodies involved and change their velocities - if (cti.m_colObj->getInternalType() == btCollisionObject::CO_RIGID_BODY) - { - btRigidBody* rigidCol = 0; - rigidCol = (btRigidBody*)btRigidBody::upcast(cti.m_colObj); - if (rigidCol) - { - rigidCol->applyImpulse(impulse, m_anchor->m_c1); - } - } - else if (cti.m_colObj->getInternalType() == btCollisionObject::CO_FEATHERSTONE_LINK) - { - btMultiBodyLinkCollider* multibodyLinkCol = 0; - multibodyLinkCol = (btMultiBodyLinkCollider*)btMultiBodyLinkCollider::upcast(cti.m_colObj); - if (multibodyLinkCol) - { - const btScalar* deltaV_normal = &m_anchor->jacobianData_normal.m_deltaVelocitiesUnitImpulse[0]; - // apply normal component of the impulse - multibodyLinkCol->m_multiBody->applyDeltaVeeMultiDof2(deltaV_normal, impulse.dot(cti.m_normal)); - // apply tangential component of the impulse - const btScalar* deltaV_t1 = &m_anchor->jacobianData_t1.m_deltaVelocitiesUnitImpulse[0]; - multibodyLinkCol->m_multiBody->applyDeltaVeeMultiDof2(deltaV_t1, impulse.dot(m_anchor->t1)); - const btScalar* deltaV_t2 = &m_anchor->jacobianData_t2.m_deltaVelocitiesUnitImpulse[0]; - multibodyLinkCol->m_multiBody->applyDeltaVeeMultiDof2(deltaV_t2, impulse.dot(m_anchor->t2)); - } - } - return residualSquare; + const btSoftBody::sCti& cti = m_anchor->m_cti; + btVector3 va = getVa(); + btVector3 vb = getVb(); + btVector3 vr = (vb - va); + // + (m_anchor->m_node->m_x - cti.m_colObj->getWorldTransform() * m_anchor->m_local) * 10.0 + const btScalar dn = btDot(vr, vr); + // dn is the normal component of velocity diffrerence. Approximates the residual. // todo xuchenhan@: this prob needs to be scaled by dt + btScalar residualSquare = dn * dn; + btVector3 impulse = m_anchor->m_c0 * vr; + // apply impulse to deformable nodes involved and change their velocities + applyImpulse(impulse); + + // apply impulse to the rigid/multibodies involved and change their velocities + if (cti.m_colObj->getInternalType() == btCollisionObject::CO_RIGID_BODY) + { + btRigidBody* rigidCol = 0; + rigidCol = (btRigidBody*)btRigidBody::upcast(cti.m_colObj); + if (rigidCol) + { + rigidCol->applyImpulse(impulse, m_anchor->m_c1); + } + } + else if (cti.m_colObj->getInternalType() == btCollisionObject::CO_FEATHERSTONE_LINK) + { + btMultiBodyLinkCollider* multibodyLinkCol = 0; + multibodyLinkCol = (btMultiBodyLinkCollider*)btMultiBodyLinkCollider::upcast(cti.m_colObj); + if (multibodyLinkCol) + { + const btScalar* deltaV_normal = &m_anchor->jacobianData_normal.m_deltaVelocitiesUnitImpulse[0]; + // apply normal component of the impulse + multibodyLinkCol->m_multiBody->applyDeltaVeeMultiDof2(deltaV_normal, impulse.dot(cti.m_normal)); + // apply tangential component of the impulse + const btScalar* deltaV_t1 = &m_anchor->jacobianData_t1.m_deltaVelocitiesUnitImpulse[0]; + multibodyLinkCol->m_multiBody->applyDeltaVeeMultiDof2(deltaV_t1, impulse.dot(m_anchor->t1)); + const btScalar* deltaV_t2 = &m_anchor->jacobianData_t2.m_deltaVelocitiesUnitImpulse[0]; + multibodyLinkCol->m_multiBody->applyDeltaVeeMultiDof2(deltaV_t2, impulse.dot(m_anchor->t2)); + } + } + return residualSquare; } btVector3 btDeformableNodeAnchorConstraint::getVb() const { - return m_anchor->m_node->m_v; + return m_anchor->m_node->m_v; } void btDeformableNodeAnchorConstraint::applyImpulse(const btVector3& impulse) { - btVector3 dv = impulse * m_anchor->m_c2; - m_anchor->m_node->m_v -= dv; + btVector3 dv = impulse * m_anchor->m_c2; + m_anchor->m_node->m_v -= dv; } /* ================ Deformable vs. Rigid =================== */ btDeformableRigidContactConstraint::btDeformableRigidContactConstraint(const btSoftBody::DeformableRigidContact& c, const btContactSolverInfo& infoGlobal) -: m_contact(&c) -, btDeformableContactConstraint(c.m_cti.m_normal, infoGlobal) + : m_contact(&c), btDeformableContactConstraint(c.m_cti.m_normal, infoGlobal) { - m_total_normal_dv.setZero(); - m_total_tangent_dv.setZero(); - // The magnitude of penetration is the depth of penetration. - m_penetration = c.m_cti.m_offset; -// m_penetration = btMin(btScalar(0),c.m_cti.m_offset); + m_total_normal_dv.setZero(); + m_total_tangent_dv.setZero(); + // The magnitude of penetration is the depth of penetration. + m_penetration = c.m_cti.m_offset; + m_total_split_impulse = 0; + m_binding = false; } btDeformableRigidContactConstraint::btDeformableRigidContactConstraint(const btDeformableRigidContactConstraint& other) -: m_contact(other.m_contact) -, btDeformableContactConstraint(other) -, m_penetration(other.m_penetration) + : m_contact(other.m_contact), btDeformableContactConstraint(other), m_penetration(other.m_penetration), m_total_split_impulse(other.m_total_split_impulse), m_binding(other.m_binding) { - m_total_normal_dv = other.m_total_normal_dv; - m_total_tangent_dv = other.m_total_tangent_dv; + m_total_normal_dv = other.m_total_normal_dv; + m_total_tangent_dv = other.m_total_tangent_dv; } - btVector3 btDeformableRigidContactConstraint::getVa() const { - const btSoftBody::sCti& cti = m_contact->m_cti; - btVector3 va(0, 0, 0); - if (cti.m_colObj->hasContactResponse()) - { - btRigidBody* rigidCol = 0; - btMultiBodyLinkCollider* multibodyLinkCol = 0; - - // grab the velocity of the rigid body - if (cti.m_colObj->getInternalType() == btCollisionObject::CO_RIGID_BODY) - { - rigidCol = (btRigidBody*)btRigidBody::upcast(cti.m_colObj); - va = rigidCol ? (rigidCol->getVelocityInLocalPoint(m_contact->m_c1)) : btVector3(0, 0, 0); - } - else if (cti.m_colObj->getInternalType() == btCollisionObject::CO_FEATHERSTONE_LINK) - { - multibodyLinkCol = (btMultiBodyLinkCollider*)btMultiBodyLinkCollider::upcast(cti.m_colObj); - if (multibodyLinkCol) - { - const int ndof = multibodyLinkCol->m_multiBody->getNumDofs() + 6; - const btScalar* J_n = &m_contact->jacobianData_normal.m_jacobians[0]; - const btScalar* J_t1 = &m_contact->jacobianData_t1.m_jacobians[0]; - const btScalar* J_t2 = &m_contact->jacobianData_t2.m_jacobians[0]; - const btScalar* local_v = multibodyLinkCol->m_multiBody->getVelocityVector(); - const btScalar* local_dv = multibodyLinkCol->m_multiBody->getDeltaVelocityVector(); - // add in the normal component of the va - btScalar vel = 0.0; - for (int k = 0; k < ndof; ++k) - { - vel += (local_v[k]+local_dv[k]) * J_n[k]; - } - va = cti.m_normal * vel; - // add in the tangential components of the va - vel = 0.0; - for (int k = 0; k < ndof; ++k) - { - vel += (local_v[k]+local_dv[k]) * J_t1[k]; - } - va += m_contact->t1 * vel; - vel = 0.0; - for (int k = 0; k < ndof; ++k) - { - vel += (local_v[k]+local_dv[k]) * J_t2[k]; - } - va += m_contact->t2 * vel; - } - } - } - return va; + const btSoftBody::sCti& cti = m_contact->m_cti; + btVector3 va(0, 0, 0); + if (cti.m_colObj->hasContactResponse()) + { + btRigidBody* rigidCol = 0; + btMultiBodyLinkCollider* multibodyLinkCol = 0; + + // grab the velocity of the rigid body + if (cti.m_colObj->getInternalType() == btCollisionObject::CO_RIGID_BODY) + { + rigidCol = (btRigidBody*)btRigidBody::upcast(cti.m_colObj); + va = rigidCol ? (rigidCol->getVelocityInLocalPoint(m_contact->m_c1)) : btVector3(0, 0, 0); + } + else if (cti.m_colObj->getInternalType() == btCollisionObject::CO_FEATHERSTONE_LINK) + { + multibodyLinkCol = (btMultiBodyLinkCollider*)btMultiBodyLinkCollider::upcast(cti.m_colObj); + if (multibodyLinkCol) + { + const int ndof = multibodyLinkCol->m_multiBody->getNumDofs() + 6; + const btScalar* J_n = &m_contact->jacobianData_normal.m_jacobians[0]; + const btScalar* J_t1 = &m_contact->jacobianData_t1.m_jacobians[0]; + const btScalar* J_t2 = &m_contact->jacobianData_t2.m_jacobians[0]; + const btScalar* local_v = multibodyLinkCol->m_multiBody->getVelocityVector(); + const btScalar* local_dv = multibodyLinkCol->m_multiBody->getDeltaVelocityVector(); + // add in the normal component of the va + btScalar vel = 0.0; + for (int k = 0; k < ndof; ++k) + { + vel += (local_v[k] + local_dv[k]) * J_n[k]; + } + va = cti.m_normal * vel; + // add in the tangential components of the va + vel = 0.0; + for (int k = 0; k < ndof; ++k) + { + vel += (local_v[k] + local_dv[k]) * J_t1[k]; + } + va += m_contact->t1 * vel; + vel = 0.0; + for (int k = 0; k < ndof; ++k) + { + vel += (local_v[k] + local_dv[k]) * J_t2[k]; + } + va += m_contact->t2 * vel; + } + } + } + return va; +} + +btVector3 btDeformableRigidContactConstraint::getSplitVa() const +{ + const btSoftBody::sCti& cti = m_contact->m_cti; + btVector3 va(0, 0, 0); + if (cti.m_colObj->hasContactResponse()) + { + btRigidBody* rigidCol = 0; + btMultiBodyLinkCollider* multibodyLinkCol = 0; + + // grab the velocity of the rigid body + if (cti.m_colObj->getInternalType() == btCollisionObject::CO_RIGID_BODY) + { + rigidCol = (btRigidBody*)btRigidBody::upcast(cti.m_colObj); + va = rigidCol ? (rigidCol->getPushVelocityInLocalPoint(m_contact->m_c1)) : btVector3(0, 0, 0); + } + else if (cti.m_colObj->getInternalType() == btCollisionObject::CO_FEATHERSTONE_LINK) + { + multibodyLinkCol = (btMultiBodyLinkCollider*)btMultiBodyLinkCollider::upcast(cti.m_colObj); + if (multibodyLinkCol) + { + const int ndof = multibodyLinkCol->m_multiBody->getNumDofs() + 6; + const btScalar* J_n = &m_contact->jacobianData_normal.m_jacobians[0]; + const btScalar* J_t1 = &m_contact->jacobianData_t1.m_jacobians[0]; + const btScalar* J_t2 = &m_contact->jacobianData_t2.m_jacobians[0]; + const btScalar* local_split_v = multibodyLinkCol->m_multiBody->getSplitVelocityVector(); + // add in the normal component of the va + btScalar vel = 0.0; + for (int k = 0; k < ndof; ++k) + { + vel += local_split_v[k] * J_n[k]; + } + va = cti.m_normal * vel; + // add in the tangential components of the va + vel = 0.0; + for (int k = 0; k < ndof; ++k) + { + vel += local_split_v[k] * J_t1[k]; + } + va += m_contact->t1 * vel; + vel = 0.0; + for (int k = 0; k < ndof; ++k) + { + vel += local_split_v[k] * J_t2[k]; + } + va += m_contact->t2 * vel; + } + } + } + return va; } btScalar btDeformableRigidContactConstraint::solveConstraint(const btContactSolverInfo& infoGlobal) { - const btSoftBody::sCti& cti = m_contact->m_cti; - btVector3 va = getVa(); - btVector3 vb = getVb(); - btVector3 vr = vb - va; - btScalar dn = btDot(vr, cti.m_normal) + m_penetration * infoGlobal.m_deformable_erp / infoGlobal.m_timeStep; - // dn is the normal component of velocity diffrerence. Approximates the residual. // todo xuchenhan@: this prob needs to be scaled by dt - btScalar residualSquare = dn*dn; - btVector3 impulse = m_contact->m_c0 * (vr + m_penetration * infoGlobal.m_deformable_erp / infoGlobal.m_timeStep * cti.m_normal) ; - const btVector3 impulse_normal = m_contact->m_c0 * (cti.m_normal * dn); - btVector3 impulse_tangent = impulse - impulse_normal; - btVector3 old_total_tangent_dv = m_total_tangent_dv; - // m_c2 is the inverse mass of the deformable node/face - m_total_normal_dv -= impulse_normal * m_contact->m_c2; - m_total_tangent_dv -= impulse_tangent * m_contact->m_c2; - - if (m_total_normal_dv.dot(cti.m_normal) < 0) - { - // separating in the normal direction - m_static = false; - m_total_tangent_dv = btVector3(0,0,0); - impulse_tangent.setZero(); - } - else - { - if (m_total_normal_dv.norm() * m_contact->m_c3 < m_total_tangent_dv.norm()) - { - // dynamic friction - // with dynamic friction, the impulse are still applied to the two objects colliding, however, it does not pose a constraint in the cg solve, hence the change to dv merely serves to update velocity in the contact iterations. - m_static = false; - if (m_total_tangent_dv.safeNorm() < SIMD_EPSILON) - { - m_total_tangent_dv = btVector3(0,0,0); - } - else - { - m_total_tangent_dv = m_total_tangent_dv.normalized() * m_total_normal_dv.safeNorm() * m_contact->m_c3; - } - impulse_tangent = -btScalar(1)/m_contact->m_c2 * (m_total_tangent_dv - old_total_tangent_dv); - } - else - { - // static friction - m_static = true; - } - } - impulse = impulse_normal + impulse_tangent; - // apply impulse to deformable nodes involved and change their velocities - applyImpulse(impulse); - if (residualSquare < 1e-7) - return residualSquare; - // apply impulse to the rigid/multibodies involved and change their velocities - if (cti.m_colObj->getInternalType() == btCollisionObject::CO_RIGID_BODY) - { - btRigidBody* rigidCol = 0; - rigidCol = (btRigidBody*)btRigidBody::upcast(cti.m_colObj); - if (rigidCol) - { - rigidCol->applyImpulse(impulse, m_contact->m_c1); - } - } - else if (cti.m_colObj->getInternalType() == btCollisionObject::CO_FEATHERSTONE_LINK) - { - btMultiBodyLinkCollider* multibodyLinkCol = 0; - multibodyLinkCol = (btMultiBodyLinkCollider*)btMultiBodyLinkCollider::upcast(cti.m_colObj); - if (multibodyLinkCol) - { - const btScalar* deltaV_normal = &m_contact->jacobianData_normal.m_deltaVelocitiesUnitImpulse[0]; - // apply normal component of the impulse - multibodyLinkCol->m_multiBody->applyDeltaVeeMultiDof2(deltaV_normal, impulse.dot(cti.m_normal)); - if (impulse_tangent.norm() > SIMD_EPSILON) - { - // apply tangential component of the impulse - const btScalar* deltaV_t1 = &m_contact->jacobianData_t1.m_deltaVelocitiesUnitImpulse[0]; - multibodyLinkCol->m_multiBody->applyDeltaVeeMultiDof2(deltaV_t1, impulse.dot(m_contact->t1)); - const btScalar* deltaV_t2 = &m_contact->jacobianData_t2.m_deltaVelocitiesUnitImpulse[0]; - multibodyLinkCol->m_multiBody->applyDeltaVeeMultiDof2(deltaV_t2, impulse.dot(m_contact->t2)); - } - } - } -// va = getVa(); -// vb = getVb(); -// vr = vb - va; -// btScalar dn1 = btDot(vr, cti.m_normal) / 150; -// m_penetration += dn1; - return residualSquare; + const btSoftBody::sCti& cti = m_contact->m_cti; + btVector3 va = getVa(); + btVector3 vb = getVb(); + btVector3 vr = vb - va; + btScalar dn = btDot(vr, cti.m_normal) + m_total_normal_dv.dot(cti.m_normal) * infoGlobal.m_deformable_cfm; + if (m_penetration > 0) + { + dn += m_penetration / infoGlobal.m_timeStep; + } + if (!infoGlobal.m_splitImpulse) + { + dn += m_penetration * infoGlobal.m_deformable_erp / infoGlobal.m_timeStep; + } + // dn is the normal component of velocity diffrerence. Approximates the residual. // todo xuchenhan@: this prob needs to be scaled by dt + btVector3 impulse = m_contact->m_c0 * (vr + m_total_normal_dv * infoGlobal.m_deformable_cfm + ((m_penetration > 0) ? m_penetration / infoGlobal.m_timeStep * cti.m_normal : btVector3(0, 0, 0))); + if (!infoGlobal.m_splitImpulse) + { + impulse += m_contact->m_c0 * (m_penetration * infoGlobal.m_deformable_erp / infoGlobal.m_timeStep * cti.m_normal); + } + btVector3 impulse_normal = m_contact->m_c0 * (cti.m_normal * dn); + btVector3 impulse_tangent = impulse - impulse_normal; + if (dn > 0) + { + return 0; + } + m_binding = true; + btScalar residualSquare = dn * dn; + btVector3 old_total_tangent_dv = m_total_tangent_dv; + // m_c5 is the inverse mass of the deformable node/face + m_total_normal_dv -= m_contact->m_c5 * impulse_normal; + m_total_tangent_dv -= m_contact->m_c5 * impulse_tangent; + + if (m_total_normal_dv.dot(cti.m_normal) < 0) + { + // separating in the normal direction + m_binding = false; + m_static = false; + impulse_tangent.setZero(); + } + else + { + if (m_total_normal_dv.norm() * m_contact->m_c3 < m_total_tangent_dv.norm()) + { + // dynamic friction + // with dynamic friction, the impulse are still applied to the two objects colliding, however, it does not pose a constraint in the cg solve, hence the change to dv merely serves to update velocity in the contact iterations. + m_static = false; + if (m_total_tangent_dv.safeNorm() < SIMD_EPSILON) + { + m_total_tangent_dv = btVector3(0, 0, 0); + } + else + { + m_total_tangent_dv = m_total_tangent_dv.normalized() * m_total_normal_dv.safeNorm() * m_contact->m_c3; + } + // impulse_tangent = -btScalar(1)/m_contact->m_c2 * (m_total_tangent_dv - old_total_tangent_dv); + impulse_tangent = m_contact->m_c5.inverse() * (old_total_tangent_dv - m_total_tangent_dv); + } + else + { + // static friction + m_static = true; + } + } + impulse = impulse_normal + impulse_tangent; + // apply impulse to deformable nodes involved and change their velocities + applyImpulse(impulse); + // apply impulse to the rigid/multibodies involved and change their velocities + if (cti.m_colObj->getInternalType() == btCollisionObject::CO_RIGID_BODY) + { + btRigidBody* rigidCol = 0; + rigidCol = (btRigidBody*)btRigidBody::upcast(cti.m_colObj); + if (rigidCol) + { + rigidCol->applyImpulse(impulse, m_contact->m_c1); + } + } + else if (cti.m_colObj->getInternalType() == btCollisionObject::CO_FEATHERSTONE_LINK) + { + btMultiBodyLinkCollider* multibodyLinkCol = 0; + multibodyLinkCol = (btMultiBodyLinkCollider*)btMultiBodyLinkCollider::upcast(cti.m_colObj); + if (multibodyLinkCol) + { + const btScalar* deltaV_normal = &m_contact->jacobianData_normal.m_deltaVelocitiesUnitImpulse[0]; + // apply normal component of the impulse + multibodyLinkCol->m_multiBody->applyDeltaVeeMultiDof2(deltaV_normal, impulse.dot(cti.m_normal)); + if (impulse_tangent.norm() > SIMD_EPSILON) + { + // apply tangential component of the impulse + const btScalar* deltaV_t1 = &m_contact->jacobianData_t1.m_deltaVelocitiesUnitImpulse[0]; + multibodyLinkCol->m_multiBody->applyDeltaVeeMultiDof2(deltaV_t1, impulse.dot(m_contact->t1)); + const btScalar* deltaV_t2 = &m_contact->jacobianData_t2.m_deltaVelocitiesUnitImpulse[0]; + multibodyLinkCol->m_multiBody->applyDeltaVeeMultiDof2(deltaV_t2, impulse.dot(m_contact->t2)); + } + } + } + return residualSquare; +} + +btScalar btDeformableRigidContactConstraint::solveSplitImpulse(const btContactSolverInfo& infoGlobal) +{ + btScalar MAX_PENETRATION_CORRECTION = infoGlobal.m_deformable_maxErrorReduction; + const btSoftBody::sCti& cti = m_contact->m_cti; + btVector3 vb = getSplitVb(); + btVector3 va = getSplitVa(); + btScalar p = m_penetration; + if (p > 0) + { + return 0; + } + btVector3 vr = vb - va; + btScalar dn = btDot(vr, cti.m_normal) + p * infoGlobal.m_deformable_erp / infoGlobal.m_timeStep; + if (dn > 0) + { + return 0; + } + if (m_total_split_impulse + dn > MAX_PENETRATION_CORRECTION) + { + dn = MAX_PENETRATION_CORRECTION - m_total_split_impulse; + } + if (m_total_split_impulse + dn < -MAX_PENETRATION_CORRECTION) + { + dn = -MAX_PENETRATION_CORRECTION - m_total_split_impulse; + } + m_total_split_impulse += dn; + + btScalar residualSquare = dn * dn; + const btVector3 impulse = m_contact->m_c0 * (cti.m_normal * dn); + applySplitImpulse(impulse); + + // apply split impulse to the rigid/multibodies involved and change their velocities + if (cti.m_colObj->getInternalType() == btCollisionObject::CO_RIGID_BODY) + { + btRigidBody* rigidCol = 0; + rigidCol = (btRigidBody*)btRigidBody::upcast(cti.m_colObj); + if (rigidCol) + { + rigidCol->applyPushImpulse(impulse, m_contact->m_c1); + } + } + else if (cti.m_colObj->getInternalType() == btCollisionObject::CO_FEATHERSTONE_LINK) + { + btMultiBodyLinkCollider* multibodyLinkCol = 0; + multibodyLinkCol = (btMultiBodyLinkCollider*)btMultiBodyLinkCollider::upcast(cti.m_colObj); + if (multibodyLinkCol) + { + const btScalar* deltaV_normal = &m_contact->jacobianData_normal.m_deltaVelocitiesUnitImpulse[0]; + // apply normal component of the impulse + multibodyLinkCol->m_multiBody->applyDeltaSplitVeeMultiDof(deltaV_normal, impulse.dot(cti.m_normal)); + } + } + return residualSquare; } /* ================ Node vs. Rigid =================== */ btDeformableNodeRigidContactConstraint::btDeformableNodeRigidContactConstraint(const btSoftBody::DeformableNodeRigidContact& contact, const btContactSolverInfo& infoGlobal) - : m_node(contact.m_node) - , btDeformableRigidContactConstraint(contact, infoGlobal) - { - } + : m_node(contact.m_node), btDeformableRigidContactConstraint(contact, infoGlobal) +{ +} btDeformableNodeRigidContactConstraint::btDeformableNodeRigidContactConstraint(const btDeformableNodeRigidContactConstraint& other) -: m_node(other.m_node) -, btDeformableRigidContactConstraint(other) + : m_node(other.m_node), btDeformableRigidContactConstraint(other) { } btVector3 btDeformableNodeRigidContactConstraint::getVb() const { - return m_node->m_v; + return m_node->m_v; } +btVector3 btDeformableNodeRigidContactConstraint::getSplitVb() const +{ + return m_node->m_splitv; +} btVector3 btDeformableNodeRigidContactConstraint::getDv(const btSoftBody::Node* node) const { - return m_total_normal_dv + m_total_tangent_dv; + return m_total_normal_dv + m_total_tangent_dv; } void btDeformableNodeRigidContactConstraint::applyImpulse(const btVector3& impulse) { - const btSoftBody::DeformableNodeRigidContact* contact = getContact(); - btVector3 dv = impulse * contact->m_c2; - contact->m_node->m_v -= dv; + const btSoftBody::DeformableNodeRigidContact* contact = getContact(); + btVector3 dv = contact->m_c5 * impulse; + contact->m_node->m_v -= dv; +} + +void btDeformableNodeRigidContactConstraint::applySplitImpulse(const btVector3& impulse) +{ + const btSoftBody::DeformableNodeRigidContact* contact = getContact(); + btVector3 dv = contact->m_c5 * impulse; + contact->m_node->m_splitv -= dv; } /* ================ Face vs. Rigid =================== */ btDeformableFaceRigidContactConstraint::btDeformableFaceRigidContactConstraint(const btSoftBody::DeformableFaceRigidContact& contact, const btContactSolverInfo& infoGlobal, bool useStrainLimiting) -: m_face(contact.m_face) -, m_useStrainLimiting(useStrainLimiting) -, btDeformableRigidContactConstraint(contact, infoGlobal) + : m_face(contact.m_face), m_useStrainLimiting(useStrainLimiting), btDeformableRigidContactConstraint(contact, infoGlobal) { } btDeformableFaceRigidContactConstraint::btDeformableFaceRigidContactConstraint(const btDeformableFaceRigidContactConstraint& other) -: m_face(other.m_face) -, m_useStrainLimiting(other.m_useStrainLimiting) -, btDeformableRigidContactConstraint(other) + : m_face(other.m_face), m_useStrainLimiting(other.m_useStrainLimiting), btDeformableRigidContactConstraint(other) { } btVector3 btDeformableFaceRigidContactConstraint::getVb() const { - const btSoftBody::DeformableFaceRigidContact* contact = getContact(); - btVector3 vb = m_face->m_n[0]->m_v * contact->m_bary[0] + m_face->m_n[1]->m_v * contact->m_bary[1] + m_face->m_n[2]->m_v * contact->m_bary[2]; - return vb; + const btSoftBody::DeformableFaceRigidContact* contact = getContact(); + btVector3 vb = m_face->m_n[0]->m_v * contact->m_bary[0] + m_face->m_n[1]->m_v * contact->m_bary[1] + m_face->m_n[2]->m_v * contact->m_bary[2]; + return vb; } - btVector3 btDeformableFaceRigidContactConstraint::getDv(const btSoftBody::Node* node) const { - btVector3 face_dv = m_total_normal_dv + m_total_tangent_dv; - const btSoftBody::DeformableFaceRigidContact* contact = getContact(); - if (m_face->m_n[0] == node) - { - return face_dv * contact->m_weights[0]; - } - if (m_face->m_n[1] == node) - { - return face_dv * contact->m_weights[1]; - } - btAssert(node == m_face->m_n[2]); - return face_dv * contact->m_weights[2]; + btVector3 face_dv = m_total_normal_dv + m_total_tangent_dv; + const btSoftBody::DeformableFaceRigidContact* contact = getContact(); + if (m_face->m_n[0] == node) + { + return face_dv * contact->m_weights[0]; + } + if (m_face->m_n[1] == node) + { + return face_dv * contact->m_weights[1]; + } + btAssert(node == m_face->m_n[2]); + return face_dv * contact->m_weights[2]; } void btDeformableFaceRigidContactConstraint::applyImpulse(const btVector3& impulse) { - const btSoftBody::DeformableFaceRigidContact* contact = getContact(); - btVector3 dv = impulse * contact->m_c2; - btSoftBody::Face* face = contact->m_face; - - btVector3& v0 = face->m_n[0]->m_v; - btVector3& v1 = face->m_n[1]->m_v; - btVector3& v2 = face->m_n[2]->m_v; - const btScalar& im0 = face->m_n[0]->m_im; - const btScalar& im1 = face->m_n[1]->m_im; - const btScalar& im2 = face->m_n[2]->m_im; - if (im0 > 0) - v0 -= dv * contact->m_weights[0]; - if (im1 > 0) - v1 -= dv * contact->m_weights[1]; - if (im2 > 0) - v2 -= dv * contact->m_weights[2]; + const btSoftBody::DeformableFaceRigidContact* contact = getContact(); + btVector3 dv = impulse * contact->m_c2; + btSoftBody::Face* face = contact->m_face; + + btVector3& v0 = face->m_n[0]->m_v; + btVector3& v1 = face->m_n[1]->m_v; + btVector3& v2 = face->m_n[2]->m_v; + const btScalar& im0 = face->m_n[0]->m_im; + const btScalar& im1 = face->m_n[1]->m_im; + const btScalar& im2 = face->m_n[2]->m_im; + if (im0 > 0) + v0 -= dv * contact->m_weights[0]; + if (im1 > 0) + v1 -= dv * contact->m_weights[1]; + if (im2 > 0) + v2 -= dv * contact->m_weights[2]; if (m_useStrainLimiting) { - btScalar relaxation = 1./btScalar(m_infoGlobal->m_numIterations); - btScalar m01 = (relaxation/(im0 + im1)); - btScalar m02 = (relaxation/(im0 + im2)); - btScalar m12 = (relaxation/(im1 + im2)); - #ifdef USE_STRAIN_RATE_LIMITING + btScalar relaxation = 1. / btScalar(m_infoGlobal->m_numIterations); + btScalar m01 = (relaxation / (im0 + im1)); + btScalar m02 = (relaxation / (im0 + im2)); + btScalar m12 = (relaxation / (im1 + im2)); +#ifdef USE_STRAIN_RATE_LIMITING // apply strain limiting to prevent the new velocity to change the current length of the edge by more than 1%. btScalar p = 0.01; btVector3& x0 = face->m_n[0]->m_x; btVector3& x1 = face->m_n[1]->m_x; btVector3& x2 = face->m_n[2]->m_x; - const btVector3 x_diff[3] = {x1-x0, x2-x0, x2-x1}; - const btVector3 v_diff[3] = {v1-v0, v2-v0, v2-v1}; + const btVector3 x_diff[3] = {x1 - x0, x2 - x0, x2 - x1}; + const btVector3 v_diff[3] = {v1 - v0, v2 - v0, v2 - v1}; btVector3 u[3]; btScalar x_diff_dot_u, dn[3]; btScalar dt = m_infoGlobal->m_timeStep; @@ -404,172 +520,201 @@ void btDeformableFaceRigidContactConstraint::applyImpulse(const btVector3& impul { btScalar x_diff_norm = x_diff[i].safeNorm(); btScalar x_diff_norm_new = (x_diff[i] + v_diff[i] * dt).safeNorm(); - btScalar strainRate = x_diff_norm_new/x_diff_norm; + btScalar strainRate = x_diff_norm_new / x_diff_norm; u[i] = v_diff[i]; u[i].safeNormalize(); - if (x_diff_norm == 0 || (1-p <= strainRate && strainRate <= 1+p)) + if (x_diff_norm == 0 || (1 - p <= strainRate && strainRate <= 1 + p)) { dn[i] = 0; continue; } x_diff_dot_u = btDot(x_diff[i], u[i]); btScalar s; - if (1-p > strainRate) + if (1 - p > strainRate) { - s = 1/dt * (-x_diff_dot_u - btSqrt(x_diff_dot_u*x_diff_dot_u + (p*p-2*p) * x_diff_norm * x_diff_norm)); + s = 1 / dt * (-x_diff_dot_u - btSqrt(x_diff_dot_u * x_diff_dot_u + (p * p - 2 * p) * x_diff_norm * x_diff_norm)); } else { - s = 1/dt * (-x_diff_dot_u + btSqrt(x_diff_dot_u*x_diff_dot_u + (p*p+2*p) * x_diff_norm * x_diff_norm)); + s = 1 / dt * (-x_diff_dot_u + btSqrt(x_diff_dot_u * x_diff_dot_u + (p * p + 2 * p) * x_diff_norm * x_diff_norm)); } // x_diff_norm_new = (x_diff[i] + s * u[i] * dt).safeNorm(); // strainRate = x_diff_norm_new/x_diff_norm; dn[i] = s - v_diff[i].safeNorm(); } - btVector3 dv0 = im0 * (m01 * u[0]*(-dn[0]) + m02 * u[1]*-(dn[1])); - btVector3 dv1 = im1 * (m01 * u[0]*(dn[0]) + m12 * u[2]*(-dn[2])); - btVector3 dv2 = im2 * (m12 * u[2]*(dn[2]) + m02 * u[1]*(dn[1])); - #else + btVector3 dv0 = im0 * (m01 * u[0] * (-dn[0]) + m02 * u[1] * -(dn[1])); + btVector3 dv1 = im1 * (m01 * u[0] * (dn[0]) + m12 * u[2] * (-dn[2])); + btVector3 dv2 = im2 * (m12 * u[2] * (dn[2]) + m02 * u[1] * (dn[1])); +#else // apply strain limiting to prevent undamped modes - btVector3 dv0 = im0 * (m01 * (v1-v0) + m02 * (v2-v0)); - btVector3 dv1 = im1 * (m01 * (v0-v1) + m12 * (v2-v1)); - btVector3 dv2 = im2 * (m12 * (v1-v2) + m02 * (v0-v2)); - #endif + btVector3 dv0 = im0 * (m01 * (v1 - v0) + m02 * (v2 - v0)); + btVector3 dv1 = im1 * (m01 * (v0 - v1) + m12 * (v2 - v1)); + btVector3 dv2 = im2 * (m12 * (v1 - v2) + m02 * (v0 - v2)); +#endif v0 += dv0; v1 += dv1; v2 += dv2; } } +btVector3 btDeformableFaceRigidContactConstraint::getSplitVb() const +{ + const btSoftBody::DeformableFaceRigidContact* contact = getContact(); + btVector3 vb = (m_face->m_n[0]->m_splitv) * contact->m_bary[0] + (m_face->m_n[1]->m_splitv) * contact->m_bary[1] + (m_face->m_n[2]->m_splitv) * contact->m_bary[2]; + return vb; +} + +void btDeformableFaceRigidContactConstraint::applySplitImpulse(const btVector3& impulse) +{ + const btSoftBody::DeformableFaceRigidContact* contact = getContact(); + btVector3 dv = impulse * contact->m_c2; + btSoftBody::Face* face = contact->m_face; + btVector3& v0 = face->m_n[0]->m_splitv; + btVector3& v1 = face->m_n[1]->m_splitv; + btVector3& v2 = face->m_n[2]->m_splitv; + const btScalar& im0 = face->m_n[0]->m_im; + const btScalar& im1 = face->m_n[1]->m_im; + const btScalar& im2 = face->m_n[2]->m_im; + if (im0 > 0) + { + v0 -= dv * contact->m_weights[0]; + } + if (im1 > 0) + { + v1 -= dv * contact->m_weights[1]; + } + if (im2 > 0) + { + v2 -= dv * contact->m_weights[2]; + } +} + /* ================ Face vs. Node =================== */ btDeformableFaceNodeContactConstraint::btDeformableFaceNodeContactConstraint(const btSoftBody::DeformableFaceNodeContact& contact, const btContactSolverInfo& infoGlobal) -: m_node(contact.m_node) -, m_face(contact.m_face) -, m_contact(&contact) -, btDeformableContactConstraint(contact.m_normal, infoGlobal) + : m_node(contact.m_node), m_face(contact.m_face), m_contact(&contact), btDeformableContactConstraint(contact.m_normal, infoGlobal) { - m_total_normal_dv.setZero(); - m_total_tangent_dv.setZero(); + m_total_normal_dv.setZero(); + m_total_tangent_dv.setZero(); } btVector3 btDeformableFaceNodeContactConstraint::getVa() const { - return m_node->m_v; + return m_node->m_v; } btVector3 btDeformableFaceNodeContactConstraint::getVb() const { - const btSoftBody::DeformableFaceNodeContact* contact = getContact(); - btVector3 vb = m_face->m_n[0]->m_v * contact->m_bary[0] + m_face->m_n[1]->m_v * contact->m_bary[1] + m_face->m_n[2]->m_v * contact->m_bary[2]; - return vb; + const btSoftBody::DeformableFaceNodeContact* contact = getContact(); + btVector3 vb = m_face->m_n[0]->m_v * contact->m_bary[0] + m_face->m_n[1]->m_v * contact->m_bary[1] + m_face->m_n[2]->m_v * contact->m_bary[2]; + return vb; } btVector3 btDeformableFaceNodeContactConstraint::getDv(const btSoftBody::Node* n) const { - btVector3 dv = m_total_normal_dv + m_total_tangent_dv; - if (n == m_node) - return dv; - const btSoftBody::DeformableFaceNodeContact* contact = getContact(); - if (m_face->m_n[0] == n) - { - return dv * contact->m_weights[0]; - } - if (m_face->m_n[1] == n) - { - return dv * contact->m_weights[1]; - } - btAssert(n == m_face->m_n[2]); - return dv * contact->m_weights[2]; + btVector3 dv = m_total_normal_dv + m_total_tangent_dv; + if (n == m_node) + return dv; + const btSoftBody::DeformableFaceNodeContact* contact = getContact(); + if (m_face->m_n[0] == n) + { + return dv * contact->m_weights[0]; + } + if (m_face->m_n[1] == n) + { + return dv * contact->m_weights[1]; + } + btAssert(n == m_face->m_n[2]); + return dv * contact->m_weights[2]; } btScalar btDeformableFaceNodeContactConstraint::solveConstraint(const btContactSolverInfo& infoGlobal) { - btVector3 va = getVa(); - btVector3 vb = getVb(); - btVector3 vr = vb - va; - const btScalar dn = btDot(vr, m_contact->m_normal); - // dn is the normal component of velocity diffrerence. Approximates the residual. // todo xuchenhan@: this prob needs to be scaled by dt - btScalar residualSquare = dn*dn; - btVector3 impulse = m_contact->m_c0 * vr; - const btVector3 impulse_normal = m_contact->m_c0 * (m_contact->m_normal * dn); - btVector3 impulse_tangent = impulse - impulse_normal; - - btVector3 old_total_tangent_dv = m_total_tangent_dv; - // m_c2 is the inverse mass of the deformable node/face - if (m_node->m_im > 0) - { - m_total_normal_dv -= impulse_normal * m_node->m_im; - m_total_tangent_dv -= impulse_tangent * m_node->m_im; - } - else - { - m_total_normal_dv -= impulse_normal * m_contact->m_imf; - m_total_tangent_dv -= impulse_tangent * m_contact->m_imf; - } - - if (m_total_normal_dv.dot(m_contact->m_normal) > 0) - { - // separating in the normal direction - m_static = false; - m_total_tangent_dv = btVector3(0,0,0); - impulse_tangent.setZero(); - } - else - { - if (m_total_normal_dv.norm() * m_contact->m_friction < m_total_tangent_dv.norm()) - { - // dynamic friction - // with dynamic friction, the impulse are still applied to the two objects colliding, however, it does not pose a constraint in the cg solve, hence the change to dv merely serves to update velocity in the contact iterations. - m_static = false; - if (m_total_tangent_dv.safeNorm() < SIMD_EPSILON) - { - m_total_tangent_dv = btVector3(0,0,0); - } - else - { - m_total_tangent_dv = m_total_tangent_dv.normalized() * m_total_normal_dv.safeNorm() * m_contact->m_friction; - } - impulse_tangent = -btScalar(1)/m_node->m_im * (m_total_tangent_dv - old_total_tangent_dv); - } - else - { - // static friction - m_static = true; - } - } - impulse = impulse_normal + impulse_tangent; - // apply impulse to deformable nodes involved and change their velocities - applyImpulse(impulse); - return residualSquare; + btVector3 va = getVa(); + btVector3 vb = getVb(); + btVector3 vr = vb - va; + const btScalar dn = btDot(vr, m_contact->m_normal); + // dn is the normal component of velocity diffrerence. Approximates the residual. // todo xuchenhan@: this prob needs to be scaled by dt + btScalar residualSquare = dn * dn; + btVector3 impulse = m_contact->m_c0 * vr; + const btVector3 impulse_normal = m_contact->m_c0 * (m_contact->m_normal * dn); + btVector3 impulse_tangent = impulse - impulse_normal; + + btVector3 old_total_tangent_dv = m_total_tangent_dv; + // m_c2 is the inverse mass of the deformable node/face + if (m_node->m_im > 0) + { + m_total_normal_dv -= impulse_normal * m_node->m_im; + m_total_tangent_dv -= impulse_tangent * m_node->m_im; + } + else + { + m_total_normal_dv -= impulse_normal * m_contact->m_imf; + m_total_tangent_dv -= impulse_tangent * m_contact->m_imf; + } + + if (m_total_normal_dv.dot(m_contact->m_normal) > 0) + { + // separating in the normal direction + m_static = false; + m_total_tangent_dv = btVector3(0, 0, 0); + impulse_tangent.setZero(); + } + else + { + if (m_total_normal_dv.norm() * m_contact->m_friction < m_total_tangent_dv.norm()) + { + // dynamic friction + // with dynamic friction, the impulse are still applied to the two objects colliding, however, it does not pose a constraint in the cg solve, hence the change to dv merely serves to update velocity in the contact iterations. + m_static = false; + if (m_total_tangent_dv.safeNorm() < SIMD_EPSILON) + { + m_total_tangent_dv = btVector3(0, 0, 0); + } + else + { + m_total_tangent_dv = m_total_tangent_dv.normalized() * m_total_normal_dv.safeNorm() * m_contact->m_friction; + } + impulse_tangent = -btScalar(1) / m_node->m_im * (m_total_tangent_dv - old_total_tangent_dv); + } + else + { + // static friction + m_static = true; + } + } + impulse = impulse_normal + impulse_tangent; + // apply impulse to deformable nodes involved and change their velocities + applyImpulse(impulse); + return residualSquare; } void btDeformableFaceNodeContactConstraint::applyImpulse(const btVector3& impulse) { - const btSoftBody::DeformableFaceNodeContact* contact = getContact(); - btVector3 dva = impulse * contact->m_node->m_im; - btVector3 dvb = impulse * contact->m_imf; - if (contact->m_node->m_im > 0) - { - contact->m_node->m_v += dva; - } - - btSoftBody::Face* face = contact->m_face; - btVector3& v0 = face->m_n[0]->m_v; - btVector3& v1 = face->m_n[1]->m_v; - btVector3& v2 = face->m_n[2]->m_v; - const btScalar& im0 = face->m_n[0]->m_im; - const btScalar& im1 = face->m_n[1]->m_im; - const btScalar& im2 = face->m_n[2]->m_im; - if (im0 > 0) - { - v0 -= dvb * contact->m_weights[0]; - } - if (im1 > 0) - { - v1 -= dvb * contact->m_weights[1]; - } - if (im2 > 0) - { - v2 -= dvb * contact->m_weights[2]; - } + const btSoftBody::DeformableFaceNodeContact* contact = getContact(); + btVector3 dva = impulse * contact->m_node->m_im; + btVector3 dvb = impulse * contact->m_imf; + if (contact->m_node->m_im > 0) + { + contact->m_node->m_v += dva; + } + + btSoftBody::Face* face = contact->m_face; + btVector3& v0 = face->m_n[0]->m_v; + btVector3& v1 = face->m_n[1]->m_v; + btVector3& v2 = face->m_n[2]->m_v; + const btScalar& im0 = face->m_n[0]->m_im; + const btScalar& im1 = face->m_n[1]->m_im; + const btScalar& im2 = face->m_n[2]->m_im; + if (im0 > 0) + { + v0 -= dvb * contact->m_weights[0]; + } + if (im1 > 0) + { + v1 -= dvb * contact->m_weights[1]; + } + if (im2 > 0) + { + v2 -= dvb * contact->m_weights[2]; + } } diff --git a/thirdparty/bullet/BulletSoftBody/btDeformableContactConstraint.h b/thirdparty/bullet/BulletSoftBody/btDeformableContactConstraint.h index 9f9d5bf0a3..1e2c9f5bce 100644 --- a/thirdparty/bullet/BulletSoftBody/btDeformableContactConstraint.h +++ b/thirdparty/bullet/BulletSoftBody/btDeformableContactConstraint.h @@ -21,51 +21,49 @@ class btDeformableContactConstraint { public: - // True if the friction is static - // False if the friction is dynamic - bool m_static; + // True if the friction is static + // False if the friction is dynamic + bool m_static; const btContactSolverInfo* m_infoGlobal; // normal of the contact btVector3 m_normal; - btDeformableContactConstraint(const btVector3& normal, const btContactSolverInfo& infoGlobal): m_static(false), m_normal(normal), m_infoGlobal(&infoGlobal) + btDeformableContactConstraint(const btVector3& normal, const btContactSolverInfo& infoGlobal) : m_static(false), m_normal(normal), m_infoGlobal(&infoGlobal) { } - btDeformableContactConstraint(bool isStatic, const btVector3& normal, const btContactSolverInfo& infoGlobal): m_static(isStatic), m_normal(normal), m_infoGlobal(&infoGlobal) + btDeformableContactConstraint(bool isStatic, const btVector3& normal, const btContactSolverInfo& infoGlobal) : m_static(isStatic), m_normal(normal), m_infoGlobal(&infoGlobal) { } - - btDeformableContactConstraint(){} + + btDeformableContactConstraint() {} btDeformableContactConstraint(const btDeformableContactConstraint& other) - : m_static(other.m_static) - , m_normal(other.m_normal) - , m_infoGlobal(other.m_infoGlobal) + : m_static(other.m_static), m_normal(other.m_normal), m_infoGlobal(other.m_infoGlobal) { } - virtual ~btDeformableContactConstraint(){} - - // solve the constraint with inelastic impulse and return the error, which is the square of normal component of velocity diffrerence - // the constraint is solved by calculating the impulse between object A and B in the contact and apply the impulse to both objects involved in the contact - virtual btScalar solveConstraint(const btContactSolverInfo& infoGlobal) = 0; - - // get the velocity of the object A in the contact - virtual btVector3 getVa() const = 0; - - // get the velocity of the object B in the contact - virtual btVector3 getVb() const = 0; - - // get the velocity change of the soft body node in the constraint - virtual btVector3 getDv(const btSoftBody::Node*) const = 0; - - // apply impulse to the soft body node and/or face involved - virtual void applyImpulse(const btVector3& impulse) = 0; - - // scale the penetration depth by erp - virtual void setPenetrationScale(btScalar scale) = 0; + virtual ~btDeformableContactConstraint() {} + + // solve the constraint with inelastic impulse and return the error, which is the square of normal component of velocity diffrerence + // the constraint is solved by calculating the impulse between object A and B in the contact and apply the impulse to both objects involved in the contact + virtual btScalar solveConstraint(const btContactSolverInfo& infoGlobal) = 0; + + // get the velocity of the object A in the contact + virtual btVector3 getVa() const = 0; + + // get the velocity of the object B in the contact + virtual btVector3 getVb() const = 0; + + // get the velocity change of the soft body node in the constraint + virtual btVector3 getDv(const btSoftBody::Node*) const = 0; + + // apply impulse to the soft body node and/or face involved + virtual void applyImpulse(const btVector3& impulse) = 0; + + // scale the penetration depth by erp + virtual void setPenetrationScale(btScalar scale) = 0; }; // @@ -73,42 +71,41 @@ public: class btDeformableStaticConstraint : public btDeformableContactConstraint { public: - btSoftBody::Node* m_node; - - btDeformableStaticConstraint(btSoftBody::Node* node, const btContactSolverInfo& infoGlobal): m_node(node), btDeformableContactConstraint(false, btVector3(0,0,0), infoGlobal) - { - } - btDeformableStaticConstraint(){} - btDeformableStaticConstraint(const btDeformableStaticConstraint& other) - : m_node(other.m_node) - , btDeformableContactConstraint(other) - { - } - - virtual ~btDeformableStaticConstraint(){} - - virtual btScalar solveConstraint(const btContactSolverInfo& infoGlobal) - { - return 0; - } - - virtual btVector3 getVa() const - { - return btVector3(0,0,0); - } - - virtual btVector3 getVb() const - { - return btVector3(0,0,0); - } - - virtual btVector3 getDv(const btSoftBody::Node* n) const - { - return btVector3(0,0,0); - } - - virtual void applyImpulse(const btVector3& impulse){} - virtual void setPenetrationScale(btScalar scale){} + btSoftBody::Node* m_node; + + btDeformableStaticConstraint(btSoftBody::Node* node, const btContactSolverInfo& infoGlobal) : m_node(node), btDeformableContactConstraint(false, btVector3(0, 0, 0), infoGlobal) + { + } + btDeformableStaticConstraint() {} + btDeformableStaticConstraint(const btDeformableStaticConstraint& other) + : m_node(other.m_node), btDeformableContactConstraint(other) + { + } + + virtual ~btDeformableStaticConstraint() {} + + virtual btScalar solveConstraint(const btContactSolverInfo& infoGlobal) + { + return 0; + } + + virtual btVector3 getVa() const + { + return btVector3(0, 0, 0); + } + + virtual btVector3 getVb() const + { + return btVector3(0, 0, 0); + } + + virtual btVector3 getDv(const btSoftBody::Node* n) const + { + return btVector3(0, 0, 0); + } + + virtual void applyImpulse(const btVector3& impulse) {} + virtual void setPenetrationScale(btScalar scale) {} }; // @@ -116,56 +113,67 @@ public: class btDeformableNodeAnchorConstraint : public btDeformableContactConstraint { public: - const btSoftBody::DeformableNodeRigidAnchor* m_anchor; - - btDeformableNodeAnchorConstraint(const btSoftBody::DeformableNodeRigidAnchor& c, const btContactSolverInfo& infoGlobal); - btDeformableNodeAnchorConstraint(const btDeformableNodeAnchorConstraint& other); - btDeformableNodeAnchorConstraint(){} - virtual ~btDeformableNodeAnchorConstraint() - { - } - virtual btScalar solveConstraint(const btContactSolverInfo& infoGlobal); - - // object A is the rigid/multi body, and object B is the deformable node/face - virtual btVector3 getVa() const; - // get the velocity of the deformable node in contact - virtual btVector3 getVb() const; - virtual btVector3 getDv(const btSoftBody::Node* n) const - { - return btVector3(0,0,0); - } - virtual void applyImpulse(const btVector3& impulse); - - virtual void setPenetrationScale(btScalar scale){} -}; + const btSoftBody::DeformableNodeRigidAnchor* m_anchor; + btDeformableNodeAnchorConstraint(const btSoftBody::DeformableNodeRigidAnchor& c, const btContactSolverInfo& infoGlobal); + btDeformableNodeAnchorConstraint(const btDeformableNodeAnchorConstraint& other); + btDeformableNodeAnchorConstraint() {} + virtual ~btDeformableNodeAnchorConstraint() + { + } + virtual btScalar solveConstraint(const btContactSolverInfo& infoGlobal); + + // object A is the rigid/multi body, and object B is the deformable node/face + virtual btVector3 getVa() const; + // get the velocity of the deformable node in contact + virtual btVector3 getVb() const; + virtual btVector3 getDv(const btSoftBody::Node* n) const + { + return btVector3(0, 0, 0); + } + virtual void applyImpulse(const btVector3& impulse); + + virtual void setPenetrationScale(btScalar scale) {} +}; // // Constraint between rigid/multi body and deformable objects class btDeformableRigidContactConstraint : public btDeformableContactConstraint { public: - btVector3 m_total_normal_dv; - btVector3 m_total_tangent_dv; - btScalar m_penetration; - const btSoftBody::DeformableRigidContact* m_contact; - - btDeformableRigidContactConstraint(const btSoftBody::DeformableRigidContact& c, const btContactSolverInfo& infoGlobal); - btDeformableRigidContactConstraint(const btDeformableRigidContactConstraint& other); - btDeformableRigidContactConstraint(){} - virtual ~btDeformableRigidContactConstraint() - { - } - - // object A is the rigid/multi body, and object B is the deformable node/face - virtual btVector3 getVa() const; - - virtual btScalar solveConstraint(const btContactSolverInfo& infoGlobal); - - virtual void setPenetrationScale(btScalar scale) - { - m_penetration *= scale; - } + btVector3 m_total_normal_dv; + btVector3 m_total_tangent_dv; + btScalar m_penetration; + btScalar m_total_split_impulse; + bool m_binding; + const btSoftBody::DeformableRigidContact* m_contact; + + btDeformableRigidContactConstraint(const btSoftBody::DeformableRigidContact& c, const btContactSolverInfo& infoGlobal); + btDeformableRigidContactConstraint(const btDeformableRigidContactConstraint& other); + btDeformableRigidContactConstraint() {} + virtual ~btDeformableRigidContactConstraint() + { + } + + // object A is the rigid/multi body, and object B is the deformable node/face + virtual btVector3 getVa() const; + + // get the split impulse velocity of the deformable face at the contact point + virtual btVector3 getSplitVb() const = 0; + + // get the split impulse velocity of the rigid/multibdoy at the contaft + virtual btVector3 getSplitVa() const; + + virtual btScalar solveConstraint(const btContactSolverInfo& infoGlobal); + + virtual void setPenetrationScale(btScalar scale) + { + m_penetration *= scale; + } + + btScalar solveSplitImpulse(const btContactSolverInfo& infoGlobal); + + virtual void applySplitImpulse(const btVector3& impulse) = 0; }; // @@ -173,29 +181,34 @@ public: class btDeformableNodeRigidContactConstraint : public btDeformableRigidContactConstraint { public: - // the deformable node in contact - btSoftBody::Node* m_node; - - btDeformableNodeRigidContactConstraint(const btSoftBody::DeformableNodeRigidContact& contact, const btContactSolverInfo& infoGlobal); - btDeformableNodeRigidContactConstraint(const btDeformableNodeRigidContactConstraint& other); - btDeformableNodeRigidContactConstraint(){} - virtual ~btDeformableNodeRigidContactConstraint() - { - } - - // get the velocity of the deformable node in contact - virtual btVector3 getVb() const; - - // get the velocity change of the input soft body node in the constraint - virtual btVector3 getDv(const btSoftBody::Node*) const; - - // cast the contact to the desired type - const btSoftBody::DeformableNodeRigidContact* getContact() const - { - return static_cast<const btSoftBody::DeformableNodeRigidContact*>(m_contact); - } - - virtual void applyImpulse(const btVector3& impulse); + // the deformable node in contact + btSoftBody::Node* m_node; + + btDeformableNodeRigidContactConstraint(const btSoftBody::DeformableNodeRigidContact& contact, const btContactSolverInfo& infoGlobal); + btDeformableNodeRigidContactConstraint(const btDeformableNodeRigidContactConstraint& other); + btDeformableNodeRigidContactConstraint() {} + virtual ~btDeformableNodeRigidContactConstraint() + { + } + + // get the velocity of the deformable node in contact + virtual btVector3 getVb() const; + + // get the split impulse velocity of the deformable face at the contact point + virtual btVector3 getSplitVb() const; + + // get the velocity change of the input soft body node in the constraint + virtual btVector3 getDv(const btSoftBody::Node*) const; + + // cast the contact to the desired type + const btSoftBody::DeformableNodeRigidContact* getContact() const + { + return static_cast<const btSoftBody::DeformableNodeRigidContact*>(m_contact); + } + + virtual void applyImpulse(const btVector3& impulse); + + virtual void applySplitImpulse(const btVector3& impulse); }; // @@ -203,28 +216,33 @@ public: class btDeformableFaceRigidContactConstraint : public btDeformableRigidContactConstraint { public: - const btSoftBody::Face* m_face; - bool m_useStrainLimiting; - btDeformableFaceRigidContactConstraint(const btSoftBody::DeformableFaceRigidContact& contact, const btContactSolverInfo& infoGlobal, bool useStrainLimiting); - btDeformableFaceRigidContactConstraint(const btDeformableFaceRigidContactConstraint& other); - btDeformableFaceRigidContactConstraint(): m_useStrainLimiting(false) {} - virtual ~btDeformableFaceRigidContactConstraint() - { - } - - // get the velocity of the deformable face at the contact point - virtual btVector3 getVb() const; - - // get the velocity change of the input soft body node in the constraint - virtual btVector3 getDv(const btSoftBody::Node*) const; - - // cast the contact to the desired type - const btSoftBody::DeformableFaceRigidContact* getContact() const - { - return static_cast<const btSoftBody::DeformableFaceRigidContact*>(m_contact); - } - - virtual void applyImpulse(const btVector3& impulse); + btSoftBody::Face* m_face; + bool m_useStrainLimiting; + btDeformableFaceRigidContactConstraint(const btSoftBody::DeformableFaceRigidContact& contact, const btContactSolverInfo& infoGlobal, bool useStrainLimiting); + btDeformableFaceRigidContactConstraint(const btDeformableFaceRigidContactConstraint& other); + btDeformableFaceRigidContactConstraint() : m_useStrainLimiting(false) {} + virtual ~btDeformableFaceRigidContactConstraint() + { + } + + // get the velocity of the deformable face at the contact point + virtual btVector3 getVb() const; + + // get the split impulse velocity of the deformable face at the contact point + virtual btVector3 getSplitVb() const; + + // get the velocity change of the input soft body node in the constraint + virtual btVector3 getDv(const btSoftBody::Node*) const; + + // cast the contact to the desired type + const btSoftBody::DeformableFaceRigidContact* getContact() const + { + return static_cast<const btSoftBody::DeformableFaceRigidContact*>(m_contact); + } + + virtual void applyImpulse(const btVector3& impulse); + + virtual void applySplitImpulse(const btVector3& impulse); }; // @@ -232,35 +250,35 @@ public: class btDeformableFaceNodeContactConstraint : public btDeformableContactConstraint { public: - btSoftBody::Node* m_node; - btSoftBody::Face* m_face; - const btSoftBody::DeformableFaceNodeContact* m_contact; - btVector3 m_total_normal_dv; - btVector3 m_total_tangent_dv; - - btDeformableFaceNodeContactConstraint(const btSoftBody::DeformableFaceNodeContact& contact, const btContactSolverInfo& infoGlobal); - btDeformableFaceNodeContactConstraint(){} - virtual ~btDeformableFaceNodeContactConstraint(){} - - virtual btScalar solveConstraint(const btContactSolverInfo& infoGlobal); - - // get the velocity of the object A in the contact - virtual btVector3 getVa() const; - - // get the velocity of the object B in the contact - virtual btVector3 getVb() const; - - // get the velocity change of the input soft body node in the constraint - virtual btVector3 getDv(const btSoftBody::Node*) const; - - // cast the contact to the desired type - const btSoftBody::DeformableFaceNodeContact* getContact() const - { - return static_cast<const btSoftBody::DeformableFaceNodeContact*>(m_contact); - } - - virtual void applyImpulse(const btVector3& impulse); - - virtual void setPenetrationScale(btScalar scale){} + btSoftBody::Node* m_node; + btSoftBody::Face* m_face; + const btSoftBody::DeformableFaceNodeContact* m_contact; + btVector3 m_total_normal_dv; + btVector3 m_total_tangent_dv; + + btDeformableFaceNodeContactConstraint(const btSoftBody::DeformableFaceNodeContact& contact, const btContactSolverInfo& infoGlobal); + btDeformableFaceNodeContactConstraint() {} + virtual ~btDeformableFaceNodeContactConstraint() {} + + virtual btScalar solveConstraint(const btContactSolverInfo& infoGlobal); + + // get the velocity of the object A in the contact + virtual btVector3 getVa() const; + + // get the velocity of the object B in the contact + virtual btVector3 getVb() const; + + // get the velocity change of the input soft body node in the constraint + virtual btVector3 getDv(const btSoftBody::Node*) const; + + // cast the contact to the desired type + const btSoftBody::DeformableFaceNodeContact* getContact() const + { + return static_cast<const btSoftBody::DeformableFaceNodeContact*>(m_contact); + } + + virtual void applyImpulse(const btVector3& impulse); + + virtual void setPenetrationScale(btScalar scale) {} }; #endif /* BT_DEFORMABLE_CONTACT_CONSTRAINT_H */ diff --git a/thirdparty/bullet/BulletSoftBody/btDeformableContactProjection.cpp b/thirdparty/bullet/BulletSoftBody/btDeformableContactProjection.cpp index 22ca8bf582..7f67260ce6 100644 --- a/thirdparty/bullet/BulletSoftBody/btDeformableContactProjection.cpp +++ b/thirdparty/bullet/BulletSoftBody/btDeformableContactProjection.cpp @@ -17,7 +17,7 @@ #include "btDeformableMultiBodyDynamicsWorld.h" #include <algorithm> #include <cmath> -btScalar btDeformableContactProjection::update(btCollisionObject** deformableBodies,int numDeformableBodies, const btContactSolverInfo& infoGlobal) +btScalar btDeformableContactProjection::update(btCollisionObject** deformableBodies, int numDeformableBodies, const btContactSolverInfo& infoGlobal) { btScalar residualSquare = 0; for (int i = 0; i < numDeformableBodies; ++i) @@ -58,27 +58,37 @@ btScalar btDeformableContactProjection::update(btCollisionObject** deformableBod return residualSquare; } -void btDeformableContactProjection::splitImpulseSetup(const btContactSolverInfo& infoGlobal) +btScalar btDeformableContactProjection::solveSplitImpulse(btCollisionObject** deformableBodies, int numDeformableBodies, const btContactSolverInfo& infoGlobal) { - for (int i = 0; i < m_softBodies.size(); ++i) + btScalar residualSquare = 0; + for (int i = 0; i < numDeformableBodies; ++i) { - // node constraints - for (int j = 0; j < m_nodeRigidConstraints[i].size(); ++j) - { - btDeformableNodeRigidContactConstraint& constraint = m_nodeRigidConstraints[i][j]; - constraint.setPenetrationScale(infoGlobal.m_deformable_erp); - } - // face constraints - for (int j = 0; j < m_faceRigidConstraints[i].size(); ++j) + for (int j = 0; j < m_softBodies.size(); ++j) { - btDeformableFaceRigidContactConstraint& constraint = m_faceRigidConstraints[i][j]; - constraint.setPenetrationScale(infoGlobal.m_deformable_erp); + btCollisionObject* psb = m_softBodies[j]; + if (psb != deformableBodies[i]) + { + continue; + } + for (int k = 0; k < m_nodeRigidConstraints[j].size(); ++k) + { + btDeformableNodeRigidContactConstraint& constraint = m_nodeRigidConstraints[j][k]; + btScalar localResidualSquare = constraint.solveSplitImpulse(infoGlobal); + residualSquare = btMax(residualSquare, localResidualSquare); + } + for (int k = 0; k < m_faceRigidConstraints[j].size(); ++k) + { + btDeformableFaceRigidContactConstraint& constraint = m_faceRigidConstraints[j][k]; + btScalar localResidualSquare = constraint.solveSplitImpulse(infoGlobal); + residualSquare = btMax(residualSquare, localResidualSquare); + } } } + return residualSquare; } void btDeformableContactProjection::setConstraints(const btContactSolverInfo& infoGlobal) -{ +{ BT_PROFILE("setConstraints"); for (int i = 0; i < m_softBodies.size(); ++i) { @@ -97,7 +107,7 @@ void btDeformableContactProjection::setConstraints(const btContactSolverInfo& in m_staticConstraints[i].push_back(static_constraint); } } - + // set up deformable anchors for (int j = 0; j < psb->m_deformableAnchors.size(); ++j) { @@ -111,7 +121,7 @@ void btDeformableContactProjection::setConstraints(const btContactSolverInfo& in btDeformableNodeAnchorConstraint constraint(anchor, infoGlobal); m_nodeAnchorConstraints[i].push_back(constraint); } - + // set Deformable Node vs. Rigid constraint for (int j = 0; j < psb->m_nodeRigidContacts.size(); ++j) { @@ -122,17 +132,9 @@ void btDeformableContactProjection::setConstraints(const btContactSolverInfo& in continue; } btDeformableNodeRigidContactConstraint constraint(contact, infoGlobal); - btVector3 va = constraint.getVa(); - btVector3 vb = constraint.getVb(); - const btVector3 vr = vb - va; - const btSoftBody::sCti& cti = contact.m_cti; - const btScalar dn = btDot(vr, cti.m_normal); - if (dn < SIMD_EPSILON) - { - m_nodeRigidConstraints[i].push_back(constraint); - } + m_nodeRigidConstraints[i].push_back(constraint); } - + // set Deformable Face vs. Rigid constraint for (int j = 0; j < psb->m_faceRigidContacts.size(); ++j) { @@ -143,15 +145,7 @@ void btDeformableContactProjection::setConstraints(const btContactSolverInfo& in continue; } btDeformableFaceRigidContactConstraint constraint(contact, infoGlobal, m_useStrainLimiting); - btVector3 va = constraint.getVa(); - btVector3 vb = constraint.getVb(); - const btVector3 vr = vb - va; - const btSoftBody::sCti& cti = contact.m_cti; - const btScalar dn = btDot(vr, cti.m_normal); - if (dn < SIMD_EPSILON) - { - m_faceRigidConstraints[i].push_back(constraint); - } + m_faceRigidConstraints[i].push_back(constraint); } } } @@ -159,267 +153,269 @@ void btDeformableContactProjection::setConstraints(const btContactSolverInfo& in void btDeformableContactProjection::project(TVStack& x) { #ifndef USE_MGS - const int dim = 3; - for (int index = 0; index < m_projectionsDict.size(); ++index) - { - btAlignedObjectArray<btVector3>& projectionDirs = *m_projectionsDict.getAtIndex(index); - size_t i = m_projectionsDict.getKeyAtIndex(index).getUid1(); - if (projectionDirs.size() >= dim) - { - // static node - x[i].setZero(); - continue; - } - else if (projectionDirs.size() == 2) - { - btVector3 dir0 = projectionDirs[0]; - btVector3 dir1 = projectionDirs[1]; - btVector3 free_dir = btCross(dir0, dir1); - if (free_dir.safeNorm() < SIMD_EPSILON) - { - x[i] -= x[i].dot(dir0) * dir0; - x[i] -= x[i].dot(dir1) * dir1; - } - else - { - free_dir.normalize(); - x[i] = x[i].dot(free_dir) * free_dir; - } - } - else - { - btAssert(projectionDirs.size() == 1); - btVector3 dir0 = projectionDirs[0]; - x[i] -= x[i].dot(dir0) * dir0; - } - } + const int dim = 3; + for (int index = 0; index < m_projectionsDict.size(); ++index) + { + btAlignedObjectArray<btVector3>& projectionDirs = *m_projectionsDict.getAtIndex(index); + size_t i = m_projectionsDict.getKeyAtIndex(index).getUid1(); + if (projectionDirs.size() >= dim) + { + // static node + x[i].setZero(); + continue; + } + else if (projectionDirs.size() == 2) + { + btVector3 dir0 = projectionDirs[0]; + btVector3 dir1 = projectionDirs[1]; + btVector3 free_dir = btCross(dir0, dir1); + if (free_dir.safeNorm() < SIMD_EPSILON) + { + x[i] -= x[i].dot(dir0) * dir0; + } + else + { + free_dir.normalize(); + x[i] = x[i].dot(free_dir) * free_dir; + } + } + else + { + btAssert(projectionDirs.size() == 1); + btVector3 dir0 = projectionDirs[0]; + x[i] -= x[i].dot(dir0) * dir0; + } + } #else - btReducedVector p(x.size()); - for (int i = 0; i < m_projections.size(); ++i) - { - p += (m_projections[i].dot(x) * m_projections[i]); - } - for (int i = 0; i < p.m_indices.size(); ++i) - { - x[p.m_indices[i]] -= p.m_vecs[i]; - } + btReducedVector p(x.size()); + for (int i = 0; i < m_projections.size(); ++i) + { + p += (m_projections[i].dot(x) * m_projections[i]); + } + for (int i = 0; i < p.m_indices.size(); ++i) + { + x[p.m_indices[i]] -= p.m_vecs[i]; + } #endif } void btDeformableContactProjection::setProjection() { #ifndef USE_MGS - BT_PROFILE("btDeformableContactProjection::setProjection"); - btAlignedObjectArray<btVector3> units; - units.push_back(btVector3(1,0,0)); - units.push_back(btVector3(0,1,0)); - units.push_back(btVector3(0,0,1)); - for (int i = 0; i < m_softBodies.size(); ++i) - { - btSoftBody* psb = m_softBodies[i]; - if (!psb->isActive()) - { - continue; - } - for (int j = 0; j < m_staticConstraints[i].size(); ++j) - { - int index = m_staticConstraints[i][j].m_node->index; - m_staticConstraints[i][j].m_node->m_penetration = SIMD_INFINITY; - if (m_projectionsDict.find(index) == NULL) - { - m_projectionsDict.insert(index, units); - } - else - { - btAlignedObjectArray<btVector3>& projections = *m_projectionsDict[index]; - for (int k = 0; k < 3; ++k) - { - projections.push_back(units[k]); - } - } - } - for (int j = 0; j < m_nodeAnchorConstraints[i].size(); ++j) - { - int index = m_nodeAnchorConstraints[i][j].m_anchor->m_node->index; - m_nodeAnchorConstraints[i][j].m_anchor->m_node->m_penetration = SIMD_INFINITY; - if (m_projectionsDict.find(index) == NULL) - { - m_projectionsDict.insert(index, units); - } - else - { - btAlignedObjectArray<btVector3>& projections = *m_projectionsDict[index]; - for (int k = 0; k < 3; ++k) - { - projections.push_back(units[k]); - } - } - } - for (int j = 0; j < m_nodeRigidConstraints[i].size(); ++j) - { - int index = m_nodeRigidConstraints[i][j].m_node->index; - m_nodeRigidConstraints[i][j].m_node->m_penetration = -m_nodeRigidConstraints[i][j].getContact()->m_cti.m_offset; - if (m_nodeRigidConstraints[i][j].m_static) - { - if (m_projectionsDict.find(index) == NULL) - { - m_projectionsDict.insert(index, units); - } - else - { - btAlignedObjectArray<btVector3>& projections = *m_projectionsDict[index]; - for (int k = 0; k < 3; ++k) - { - projections.push_back(units[k]); - } - } - } - else - { - if (m_projectionsDict.find(index) == NULL) - { - btAlignedObjectArray<btVector3> projections; - projections.push_back(m_nodeRigidConstraints[i][j].m_normal); - m_projectionsDict.insert(index, projections); - } - else - { - btAlignedObjectArray<btVector3>& projections = *m_projectionsDict[index]; - projections.push_back(m_nodeRigidConstraints[i][j].m_normal); - } - } - } - for (int j = 0; j < m_faceRigidConstraints[i].size(); ++j) - { - const btSoftBody::Face* face = m_faceRigidConstraints[i][j].m_face; - btScalar penetration = -m_faceRigidConstraints[i][j].getContact()->m_cti.m_offset; - for (int k = 0; k < 3; ++k) - { - face->m_n[k]->m_penetration = btMax(face->m_n[k]->m_penetration, penetration); - } - for (int k = 0; k < 3; ++k) - { - btSoftBody::Node* node = face->m_n[k]; - node->m_penetration = true; - int index = node->index; - if (m_faceRigidConstraints[i][j].m_static) - { - if (m_projectionsDict.find(index) == NULL) - { - m_projectionsDict.insert(index, units); - } - else - { - btAlignedObjectArray<btVector3>& projections = *m_projectionsDict[index]; - for (int k = 0; k < 3; ++k) - { - projections.push_back(units[k]); - } - } - } - else - { - if (m_projectionsDict.find(index) == NULL) - { - btAlignedObjectArray<btVector3> projections; - projections.push_back(m_faceRigidConstraints[i][j].m_normal); - m_projectionsDict.insert(index, projections); - } - else - { - btAlignedObjectArray<btVector3>& projections = *m_projectionsDict[index]; - projections.push_back(m_faceRigidConstraints[i][j].m_normal); - } - } - } - } - } + BT_PROFILE("btDeformableContactProjection::setProjection"); + btAlignedObjectArray<btVector3> units; + units.push_back(btVector3(1, 0, 0)); + units.push_back(btVector3(0, 1, 0)); + units.push_back(btVector3(0, 0, 1)); + for (int i = 0; i < m_softBodies.size(); ++i) + { + btSoftBody* psb = m_softBodies[i]; + if (!psb->isActive()) + { + continue; + } + for (int j = 0; j < m_staticConstraints[i].size(); ++j) + { + int index = m_staticConstraints[i][j].m_node->index; + m_staticConstraints[i][j].m_node->m_constrained = true; + if (m_projectionsDict.find(index) == NULL) + { + m_projectionsDict.insert(index, units); + } + else + { + btAlignedObjectArray<btVector3>& projections = *m_projectionsDict[index]; + for (int k = 0; k < 3; ++k) + { + projections.push_back(units[k]); + } + } + } + for (int j = 0; j < m_nodeAnchorConstraints[i].size(); ++j) + { + int index = m_nodeAnchorConstraints[i][j].m_anchor->m_node->index; + m_nodeAnchorConstraints[i][j].m_anchor->m_node->m_constrained = true; + if (m_projectionsDict.find(index) == NULL) + { + m_projectionsDict.insert(index, units); + } + else + { + btAlignedObjectArray<btVector3>& projections = *m_projectionsDict[index]; + for (int k = 0; k < 3; ++k) + { + projections.push_back(units[k]); + } + } + } + for (int j = 0; j < m_nodeRigidConstraints[i].size(); ++j) + { + int index = m_nodeRigidConstraints[i][j].m_node->index; + m_nodeRigidConstraints[i][j].m_node->m_constrained = true; + if (m_nodeRigidConstraints[i][j].m_binding) + { + if (m_nodeRigidConstraints[i][j].m_static) + { + if (m_projectionsDict.find(index) == NULL) + { + m_projectionsDict.insert(index, units); + } + else + { + btAlignedObjectArray<btVector3>& projections = *m_projectionsDict[index]; + for (int k = 0; k < 3; ++k) + { + projections.push_back(units[k]); + } + } + } + else + { + if (m_projectionsDict.find(index) == NULL) + { + btAlignedObjectArray<btVector3> projections; + projections.push_back(m_nodeRigidConstraints[i][j].m_normal); + m_projectionsDict.insert(index, projections); + } + else + { + btAlignedObjectArray<btVector3>& projections = *m_projectionsDict[index]; + projections.push_back(m_nodeRigidConstraints[i][j].m_normal); + } + } + } + } + for (int j = 0; j < m_faceRigidConstraints[i].size(); ++j) + { + const btSoftBody::Face* face = m_faceRigidConstraints[i][j].m_face; + if (m_faceRigidConstraints[i][j].m_binding) + { + for (int k = 0; k < 3; ++k) + { + face->m_n[k]->m_constrained = true; + } + } + for (int k = 0; k < 3; ++k) + { + btSoftBody::Node* node = face->m_n[k]; + int index = node->index; + if (m_faceRigidConstraints[i][j].m_static) + { + if (m_projectionsDict.find(index) == NULL) + { + m_projectionsDict.insert(index, units); + } + else + { + btAlignedObjectArray<btVector3>& projections = *m_projectionsDict[index]; + for (int l = 0; l < 3; ++l) + { + projections.push_back(units[l]); + } + } + } + else + { + if (m_projectionsDict.find(index) == NULL) + { + btAlignedObjectArray<btVector3> projections; + projections.push_back(m_faceRigidConstraints[i][j].m_normal); + m_projectionsDict.insert(index, projections); + } + else + { + btAlignedObjectArray<btVector3>& projections = *m_projectionsDict[index]; + projections.push_back(m_faceRigidConstraints[i][j].m_normal); + } + } + } + } + } #else - int dof = 0; - for (int i = 0; i < m_softBodies.size(); ++i) - { - dof += m_softBodies[i]->m_nodes.size(); - } - for (int i = 0; i < m_softBodies.size(); ++i) - { - btSoftBody* psb = m_softBodies[i]; - if (!psb->isActive()) - { - continue; - } - for (int j = 0; j < m_staticConstraints[i].size(); ++j) - { - int index = m_staticConstraints[i][j].m_node->index; - m_staticConstraints[i][j].m_node->m_penetration = SIMD_INFINITY; - btAlignedObjectArray<int> indices; - btAlignedObjectArray<btVector3> vecs1,vecs2,vecs3; - indices.push_back(index); - vecs1.push_back(btVector3(1,0,0)); - vecs2.push_back(btVector3(0,1,0)); - vecs3.push_back(btVector3(0,0,1)); - m_projections.push_back(btReducedVector(dof, indices, vecs1)); - m_projections.push_back(btReducedVector(dof, indices, vecs2)); - m_projections.push_back(btReducedVector(dof, indices, vecs3)); - } - - for (int j = 0; j < m_nodeAnchorConstraints[i].size(); ++j) - { - int index = m_nodeAnchorConstraints[i][j].m_anchor->m_node->index; - m_nodeAnchorConstraints[i][j].m_anchor->m_node->m_penetration = SIMD_INFINITY; - btAlignedObjectArray<int> indices; - btAlignedObjectArray<btVector3> vecs1,vecs2,vecs3; - indices.push_back(index); - vecs1.push_back(btVector3(1,0,0)); - vecs2.push_back(btVector3(0,1,0)); - vecs3.push_back(btVector3(0,0,1)); - m_projections.push_back(btReducedVector(dof, indices, vecs1)); - m_projections.push_back(btReducedVector(dof, indices, vecs2)); - m_projections.push_back(btReducedVector(dof, indices, vecs3)); - } - for (int j = 0; j < m_nodeRigidConstraints[i].size(); ++j) - { - int index = m_nodeRigidConstraints[i][j].m_node->index; - m_nodeRigidConstraints[i][j].m_node->m_penetration = -m_nodeRigidConstraints[i][j].getContact()->m_cti.m_offset; - btAlignedObjectArray<int> indices; - indices.push_back(index); - btAlignedObjectArray<btVector3> vecs1,vecs2,vecs3; - if (m_nodeRigidConstraints[i][j].m_static) - { - vecs1.push_back(btVector3(1,0,0)); - vecs2.push_back(btVector3(0,1,0)); - vecs3.push_back(btVector3(0,0,1)); - m_projections.push_back(btReducedVector(dof, indices, vecs1)); - m_projections.push_back(btReducedVector(dof, indices, vecs2)); - m_projections.push_back(btReducedVector(dof, indices, vecs3)); - } - else - { - vecs1.push_back(m_nodeRigidConstraints[i][j].m_normal); - m_projections.push_back(btReducedVector(dof, indices, vecs1)); - } - } - for (int j = 0; j < m_faceRigidConstraints[i].size(); ++j) - { - const btSoftBody::Face* face = m_faceRigidConstraints[i][j].m_face; + int dof = 0; + for (int i = 0; i < m_softBodies.size(); ++i) + { + dof += m_softBodies[i]->m_nodes.size(); + } + for (int i = 0; i < m_softBodies.size(); ++i) + { + btSoftBody* psb = m_softBodies[i]; + if (!psb->isActive()) + { + continue; + } + for (int j = 0; j < m_staticConstraints[i].size(); ++j) + { + int index = m_staticConstraints[i][j].m_node->index; + m_staticConstraints[i][j].m_node->m_penetration = SIMD_INFINITY; + btAlignedObjectArray<int> indices; + btAlignedObjectArray<btVector3> vecs1, vecs2, vecs3; + indices.push_back(index); + vecs1.push_back(btVector3(1, 0, 0)); + vecs2.push_back(btVector3(0, 1, 0)); + vecs3.push_back(btVector3(0, 0, 1)); + m_projections.push_back(btReducedVector(dof, indices, vecs1)); + m_projections.push_back(btReducedVector(dof, indices, vecs2)); + m_projections.push_back(btReducedVector(dof, indices, vecs3)); + } + + for (int j = 0; j < m_nodeAnchorConstraints[i].size(); ++j) + { + int index = m_nodeAnchorConstraints[i][j].m_anchor->m_node->index; + m_nodeAnchorConstraints[i][j].m_anchor->m_node->m_penetration = SIMD_INFINITY; + btAlignedObjectArray<int> indices; + btAlignedObjectArray<btVector3> vecs1, vecs2, vecs3; + indices.push_back(index); + vecs1.push_back(btVector3(1, 0, 0)); + vecs2.push_back(btVector3(0, 1, 0)); + vecs3.push_back(btVector3(0, 0, 1)); + m_projections.push_back(btReducedVector(dof, indices, vecs1)); + m_projections.push_back(btReducedVector(dof, indices, vecs2)); + m_projections.push_back(btReducedVector(dof, indices, vecs3)); + } + for (int j = 0; j < m_nodeRigidConstraints[i].size(); ++j) + { + int index = m_nodeRigidConstraints[i][j].m_node->index; + m_nodeRigidConstraints[i][j].m_node->m_penetration = -m_nodeRigidConstraints[i][j].getContact()->m_cti.m_offset; + btAlignedObjectArray<int> indices; + indices.push_back(index); + btAlignedObjectArray<btVector3> vecs1, vecs2, vecs3; + if (m_nodeRigidConstraints[i][j].m_static) + { + vecs1.push_back(btVector3(1, 0, 0)); + vecs2.push_back(btVector3(0, 1, 0)); + vecs3.push_back(btVector3(0, 0, 1)); + m_projections.push_back(btReducedVector(dof, indices, vecs1)); + m_projections.push_back(btReducedVector(dof, indices, vecs2)); + m_projections.push_back(btReducedVector(dof, indices, vecs3)); + } + else + { + vecs1.push_back(m_nodeRigidConstraints[i][j].m_normal); + m_projections.push_back(btReducedVector(dof, indices, vecs1)); + } + } + for (int j = 0; j < m_faceRigidConstraints[i].size(); ++j) + { + const btSoftBody::Face* face = m_faceRigidConstraints[i][j].m_face; btVector3 bary = m_faceRigidConstraints[i][j].getContact()->m_bary; - btScalar penetration = -m_faceRigidConstraints[i][j].getContact()->m_cti.m_offset; - for (int k = 0; k < 3; ++k) - { - face->m_n[k]->m_penetration = btMax(face->m_n[k]->m_penetration, penetration); - } + btScalar penetration = -m_faceRigidConstraints[i][j].getContact()->m_cti.m_offset; + for (int k = 0; k < 3; ++k) + { + face->m_n[k]->m_penetration = btMax(face->m_n[k]->m_penetration, penetration); + } if (m_faceRigidConstraints[i][j].m_static) { for (int l = 0; l < 3; ++l) { - btReducedVector rv(dof); for (int k = 0; k < 3; ++k) { rv.m_indices.push_back(face->m_n[k]->index); - btVector3 v(0,0,0); + btVector3 v(0, 0, 0); v[l] = bary[k]; rv.m_vecs.push_back(v); - rv.sort(); + rv.sort(); } m_projections.push_back(rv); } @@ -431,121 +427,134 @@ void btDeformableContactProjection::setProjection() { rv.m_indices.push_back(face->m_n[k]->index); rv.m_vecs.push_back(bary[k] * m_faceRigidConstraints[i][j].m_normal); - rv.sort(); + rv.sort(); } m_projections.push_back(rv); } } - } - btModifiedGramSchmidt<btReducedVector> mgs(m_projections); - mgs.solve(); - m_projections = mgs.m_out; + } + btModifiedGramSchmidt<btReducedVector> mgs(m_projections); + mgs.solve(); + m_projections = mgs.m_out; #endif } void btDeformableContactProjection::checkConstraints(const TVStack& x) { - for (int i = 0; i < m_lagrangeMultipliers.size(); ++i) - { - btVector3 d(0,0,0); - const LagrangeMultiplier& lm = m_lagrangeMultipliers[i]; - for (int j = 0; j < lm.m_num_constraints; ++j) - { - for (int k = 0; k < lm.m_num_nodes; ++k) - { - d[j] += lm.m_weights[k] * x[lm.m_indices[k]].dot(lm.m_dirs[j]); - } - } - printf("d = %f, %f, %f\n",d[0],d[1],d[2]); - } + for (int i = 0; i < m_lagrangeMultipliers.size(); ++i) + { + btVector3 d(0, 0, 0); + const LagrangeMultiplier& lm = m_lagrangeMultipliers[i]; + for (int j = 0; j < lm.m_num_constraints; ++j) + { + for (int k = 0; k < lm.m_num_nodes; ++k) + { + d[j] += lm.m_weights[k] * x[lm.m_indices[k]].dot(lm.m_dirs[j]); + } + } + // printf("d = %f, %f, %f\n", d[0], d[1], d[2]); + // printf("val = %f, %f, %f\n", lm.m_vals[0], lm.m_vals[1], lm.m_vals[2]); + } } void btDeformableContactProjection::setLagrangeMultiplier() { - for (int i = 0; i < m_softBodies.size(); ++i) - { - btSoftBody* psb = m_softBodies[i]; - if (!psb->isActive()) - { - continue; - } - for (int j = 0; j < m_staticConstraints[i].size(); ++j) - { - int index = m_staticConstraints[i][j].m_node->index; - m_staticConstraints[i][j].m_node->m_penetration = SIMD_INFINITY; - LagrangeMultiplier lm; - lm.m_num_nodes = 1; - lm.m_indices[0] = index; - lm.m_weights[0] = 1.0; - lm.m_num_constraints = 3; - lm.m_dirs[0] = btVector3(1,0,0); - lm.m_dirs[1] = btVector3(0,1,0); - lm.m_dirs[2] = btVector3(0,0,1); - m_lagrangeMultipliers.push_back(lm); - } - for (int j = 0; j < m_nodeAnchorConstraints[i].size(); ++j) - { - int index = m_nodeAnchorConstraints[i][j].m_anchor->m_node->index; - m_nodeAnchorConstraints[i][j].m_anchor->m_node->m_penetration = SIMD_INFINITY; - LagrangeMultiplier lm; - lm.m_num_nodes = 1; - lm.m_indices[0] = index; - lm.m_weights[0] = 1.0; - lm.m_num_constraints = 3; - lm.m_dirs[0] = btVector3(1,0,0); - lm.m_dirs[1] = btVector3(0,1,0); - lm.m_dirs[2] = btVector3(0,0,1); - m_lagrangeMultipliers.push_back(lm); - } - for (int j = 0; j < m_nodeRigidConstraints[i].size(); ++j) - { - int index = m_nodeRigidConstraints[i][j].m_node->index; - m_nodeRigidConstraints[i][j].m_node->m_penetration = -m_nodeRigidConstraints[i][j].getContact()->m_cti.m_offset; - LagrangeMultiplier lm; - lm.m_num_nodes = 1; - lm.m_indices[0] = index; - lm.m_weights[0] = 1.0; - if (m_nodeRigidConstraints[i][j].m_static) - { - lm.m_num_constraints = 3; - lm.m_dirs[0] = btVector3(1,0,0); - lm.m_dirs[1] = btVector3(0,1,0); - lm.m_dirs[2] = btVector3(0,0,1); - } - else - { - lm.m_num_constraints = 1; - lm.m_dirs[0] = m_nodeRigidConstraints[i][j].m_normal; - } - m_lagrangeMultipliers.push_back(lm); - } - for (int j = 0; j < m_faceRigidConstraints[i].size(); ++j) - { - const btSoftBody::Face* face = m_faceRigidConstraints[i][j].m_face; - - btVector3 bary = m_faceRigidConstraints[i][j].getContact()->m_bary; - btScalar penetration = -m_faceRigidConstraints[i][j].getContact()->m_cti.m_offset; + for (int i = 0; i < m_softBodies.size(); ++i) + { + btSoftBody* psb = m_softBodies[i]; + if (!psb->isActive()) + { + continue; + } + for (int j = 0; j < m_staticConstraints[i].size(); ++j) + { + int index = m_staticConstraints[i][j].m_node->index; + m_staticConstraints[i][j].m_node->m_constrained = true; + LagrangeMultiplier lm; + lm.m_num_nodes = 1; + lm.m_indices[0] = index; + lm.m_weights[0] = 1.0; + lm.m_num_constraints = 3; + lm.m_dirs[0] = btVector3(1, 0, 0); + lm.m_dirs[1] = btVector3(0, 1, 0); + lm.m_dirs[2] = btVector3(0, 0, 1); + m_lagrangeMultipliers.push_back(lm); + } + for (int j = 0; j < m_nodeAnchorConstraints[i].size(); ++j) + { + int index = m_nodeAnchorConstraints[i][j].m_anchor->m_node->index; + m_nodeAnchorConstraints[i][j].m_anchor->m_node->m_constrained = true; + LagrangeMultiplier lm; + lm.m_num_nodes = 1; + lm.m_indices[0] = index; + lm.m_weights[0] = 1.0; + lm.m_num_constraints = 3; + lm.m_dirs[0] = btVector3(1, 0, 0); + lm.m_dirs[1] = btVector3(0, 1, 0); + lm.m_dirs[2] = btVector3(0, 0, 1); + m_lagrangeMultipliers.push_back(lm); + } + + for (int j = 0; j < m_nodeRigidConstraints[i].size(); ++j) + { + if (!m_nodeRigidConstraints[i][j].m_binding) + { + continue; + } + int index = m_nodeRigidConstraints[i][j].m_node->index; + m_nodeRigidConstraints[i][j].m_node->m_constrained = true; + LagrangeMultiplier lm; + lm.m_num_nodes = 1; + lm.m_indices[0] = index; + lm.m_weights[0] = 1.0; + if (m_nodeRigidConstraints[i][j].m_static) + { + lm.m_num_constraints = 3; + lm.m_dirs[0] = btVector3(1, 0, 0); + lm.m_dirs[1] = btVector3(0, 1, 0); + lm.m_dirs[2] = btVector3(0, 0, 1); + } + else + { + lm.m_num_constraints = 1; + lm.m_dirs[0] = m_nodeRigidConstraints[i][j].m_normal; + } + m_lagrangeMultipliers.push_back(lm); + } + + for (int j = 0; j < m_faceRigidConstraints[i].size(); ++j) + { + if (!m_faceRigidConstraints[i][j].m_binding) + { + continue; + } + btSoftBody::Face* face = m_faceRigidConstraints[i][j].m_face; + + btVector3 bary = m_faceRigidConstraints[i][j].getContact()->m_bary; LagrangeMultiplier lm; lm.m_num_nodes = 3; - for (int k = 0; k<3; ++k) + + for (int k = 0; k < 3; ++k) { - face->m_n[k]->m_penetration = btMax(face->m_n[k]->m_penetration, penetration); + face->m_n[k]->m_constrained = true; lm.m_indices[k] = face->m_n[k]->index; lm.m_weights[k] = bary[k]; } - if (m_faceRigidConstraints[i][j].m_static) - { + if (m_faceRigidConstraints[i][j].m_static) + { + face->m_pcontact[3] = 1; lm.m_num_constraints = 3; - lm.m_dirs[0] = btVector3(1,0,0); - lm.m_dirs[1] = btVector3(0,1,0); - lm.m_dirs[2] = btVector3(0,0,1); + lm.m_dirs[0] = btVector3(1, 0, 0); + lm.m_dirs[1] = btVector3(0, 1, 0); + lm.m_dirs[2] = btVector3(0, 0, 1); } else { + face->m_pcontact[3] = 0; lm.m_num_constraints = 1; lm.m_dirs[0] = m_faceRigidConstraints[i][j].m_normal; } - m_lagrangeMultipliers.push_back(lm); + m_lagrangeMultipliers.push_back(lm); } } } @@ -562,7 +571,7 @@ void btDeformableContactProjection::applyDynamicFriction(TVStack& f) if (node->m_im != 0) { int index = node->index; - f[index] += constraint.getDv(node)* (1./node->m_im); + f[index] += constraint.getDv(node) * (1. / node->m_im); } } for (int j = 0; j < m_faceRigidConstraints[i].size(); ++j) @@ -575,7 +584,7 @@ void btDeformableContactProjection::applyDynamicFriction(TVStack& f) if (node->m_im != 0) { int index = node->index; - f[index] += constraint.getDv(node)* (1./node->m_im); + f[index] += constraint.getDv(node) * (1. / node->m_im); } } } @@ -587,7 +596,7 @@ void btDeformableContactProjection::applyDynamicFriction(TVStack& f) if (node->m_im != 0) { int index = node->index; - f[index] += constraint.getDv(node)* (1./node->m_im); + f[index] += constraint.getDv(node) * (1. / node->m_im); } for (int k = 0; k < 3; ++k) { @@ -595,7 +604,7 @@ void btDeformableContactProjection::applyDynamicFriction(TVStack& f) if (node->m_im != 0) { int index = node->index; - f[index] += constraint.getDv(node)* (1./node->m_im); + f[index] += constraint.getDv(node) * (1. / node->m_im); } } } @@ -612,9 +621,8 @@ void btDeformableContactProjection::reinitialize(bool nodeUpdated) m_nodeRigidConstraints.resize(N); m_faceRigidConstraints.resize(N); m_deformableConstraints.resize(N); - } - for (int i = 0 ; i < N; ++i) + for (int i = 0; i < N; ++i) { m_staticConstraints[i].clear(); m_nodeAnchorConstraints[i].clear(); @@ -623,12 +631,9 @@ void btDeformableContactProjection::reinitialize(bool nodeUpdated) m_deformableConstraints[i].clear(); } #ifndef USE_MGS - m_projectionsDict.clear(); + m_projectionsDict.clear(); #else - m_projections.clear(); + m_projections.clear(); #endif - m_lagrangeMultipliers.clear(); + m_lagrangeMultipliers.clear(); } - - - diff --git a/thirdparty/bullet/BulletSoftBody/btDeformableContactProjection.h b/thirdparty/bullet/BulletSoftBody/btDeformableContactProjection.h index 8d7e94d4fb..4964eaf990 100644 --- a/thirdparty/bullet/BulletSoftBody/btDeformableContactProjection.h +++ b/thirdparty/bullet/BulletSoftBody/btDeformableContactProjection.h @@ -27,31 +27,30 @@ struct LagrangeMultiplier { - int m_num_constraints; // Number of constraints - int m_num_nodes; // Number of nodes in these constraints - btScalar m_weights[3]; // weights of the nodes involved, same size as m_num_nodes - btVector3 m_dirs[3]; // Constraint directions, same size of m_num_constraints; - int m_indices[3]; // indices of the nodes involved, same size as m_num_nodes; + int m_num_constraints; // Number of constraints + int m_num_nodes; // Number of nodes in these constraints + btScalar m_weights[3]; // weights of the nodes involved, same size as m_num_nodes + btVector3 m_dirs[3]; // Constraint directions, same size of m_num_constraints; + int m_indices[3]; // indices of the nodes involved, same size as m_num_nodes; }; - class btDeformableContactProjection { public: - typedef btAlignedObjectArray<btVector3> TVStack; - btAlignedObjectArray<btSoftBody *>& m_softBodies; - - // all constraints involving face - btAlignedObjectArray<btDeformableContactConstraint*> m_allFaceConstraints; + typedef btAlignedObjectArray<btVector3> TVStack; + btAlignedObjectArray<btSoftBody*>& m_softBodies; + + // all constraints involving face + btAlignedObjectArray<btDeformableContactConstraint*> m_allFaceConstraints; #ifndef USE_MGS - // map from node index to projection directions - btHashMap<btHashInt, btAlignedObjectArray<btVector3> > m_projectionsDict; + // map from node index to projection directions + btHashMap<btHashInt, btAlignedObjectArray<btVector3> > m_projectionsDict; #else - btAlignedObjectArray<btReducedVector> m_projections; + btAlignedObjectArray<btReducedVector> m_projections; #endif - - btAlignedObjectArray<LagrangeMultiplier> m_lagrangeMultipliers; - + + btAlignedObjectArray<LagrangeMultiplier> m_lagrangeMultipliers; + // map from node index to static constraint btAlignedObjectArray<btAlignedObjectArray<btDeformableStaticConstraint> > m_staticConstraints; // map from node index to node rigid constraint @@ -62,39 +61,39 @@ public: btAlignedObjectArray<btAlignedObjectArray<btDeformableFaceNodeContactConstraint> > m_deformableConstraints; // map from node index to node anchor constraint btAlignedObjectArray<btAlignedObjectArray<btDeformableNodeAnchorConstraint> > m_nodeAnchorConstraints; - - bool m_useStrainLimiting; - - btDeformableContactProjection(btAlignedObjectArray<btSoftBody *>& softBodies) - : m_softBodies(softBodies) - { - } - - virtual ~btDeformableContactProjection() - { - } - - // apply the constraints to the rhs of the linear solve - virtual void project(TVStack& x); - - // add friction force to the rhs of the linear solve - virtual void applyDynamicFriction(TVStack& f); - - // update and solve the constraints - virtual btScalar update(btCollisionObject** deformableBodies,int numDeformableBodies, const btContactSolverInfo& infoGlobal); - - // Add constraints to m_constraints. In addition, the constraints that each vertex own are recorded in m_constraintsDict. - virtual void setConstraints(const btContactSolverInfo& infoGlobal); - - // Set up projections for each vertex by adding the projection direction to - virtual void setProjection(); - - virtual void reinitialize(bool nodeUpdated); - - virtual void splitImpulseSetup(const btContactSolverInfo& infoGlobal); - - virtual void setLagrangeMultiplier(); - - void checkConstraints(const TVStack& x); + + bool m_useStrainLimiting; + + btDeformableContactProjection(btAlignedObjectArray<btSoftBody*>& softBodies) + : m_softBodies(softBodies) + { + } + + virtual ~btDeformableContactProjection() + { + } + + // apply the constraints to the rhs of the linear solve + virtual void project(TVStack& x); + + // add friction force to the rhs of the linear solve + virtual void applyDynamicFriction(TVStack& f); + + // update and solve the constraints + virtual btScalar update(btCollisionObject** deformableBodies, int numDeformableBodies, const btContactSolverInfo& infoGlobal); + + // Add constraints to m_constraints. In addition, the constraints that each vertex own are recorded in m_constraintsDict. + virtual void setConstraints(const btContactSolverInfo& infoGlobal); + + // Set up projections for each vertex by adding the projection direction to + virtual void setProjection(); + + virtual void reinitialize(bool nodeUpdated); + + btScalar solveSplitImpulse(btCollisionObject** deformableBodies, int numDeformableBodies, const btContactSolverInfo& infoGlobal); + + virtual void setLagrangeMultiplier(); + + void checkConstraints(const TVStack& x); }; #endif /* btDeformableContactProjection_h */ diff --git a/thirdparty/bullet/BulletSoftBody/btDeformableCorotatedForce.h b/thirdparty/bullet/BulletSoftBody/btDeformableCorotatedForce.h index 2d042df729..dfd85523bc 100644 --- a/thirdparty/bullet/BulletSoftBody/btDeformableCorotatedForce.h +++ b/thirdparty/bullet/BulletSoftBody/btDeformableCorotatedForce.h @@ -21,107 +21,104 @@ static inline int PolarDecomposition(const btMatrix3x3& m, btMatrix3x3& q, btMatrix3x3& s) { - static const btPolarDecomposition polar; - return polar.decompose(m, q, s); + static const btPolarDecomposition polar; + return polar.decompose(m, q, s); } class btDeformableCorotatedForce : public btDeformableLagrangianForce { public: - typedef btAlignedObjectArray<btVector3> TVStack; - btScalar m_mu, m_lambda; - btDeformableCorotatedForce(): m_mu(1), m_lambda(1) - { - - } - - btDeformableCorotatedForce(btScalar mu, btScalar lambda): m_mu(mu), m_lambda(lambda) - { - } - - virtual void addScaledForces(btScalar scale, TVStack& force) - { - addScaledElasticForce(scale, force); - } - - virtual void addScaledExplicitForce(btScalar scale, TVStack& force) - { - addScaledElasticForce(scale, force); - } - - virtual void addScaledDampingForce(btScalar scale, TVStack& force) - { - } - - virtual void addScaledElasticForce(btScalar scale, TVStack& force) - { - int numNodes = getNumNodes(); - btAssert(numNodes <= force.size()); - btVector3 grad_N_hat_1st_col = btVector3(-1,-1,-1); - for (int i = 0; i < m_softBodies.size(); ++i) - { - btSoftBody* psb = m_softBodies[i]; - for (int j = 0; j < psb->m_tetras.size(); ++j) - { - btSoftBody::Tetra& tetra = psb->m_tetras[j]; - btMatrix3x3 P; - firstPiola(tetra.m_F,P); - btVector3 force_on_node0 = P * (tetra.m_Dm_inverse.transpose()*grad_N_hat_1st_col); - btMatrix3x3 force_on_node123 = P * tetra.m_Dm_inverse.transpose(); - - btSoftBody::Node* node0 = tetra.m_n[0]; - btSoftBody::Node* node1 = tetra.m_n[1]; - btSoftBody::Node* node2 = tetra.m_n[2]; - btSoftBody::Node* node3 = tetra.m_n[3]; - size_t id0 = node0->index; - size_t id1 = node1->index; - size_t id2 = node2->index; - size_t id3 = node3->index; - - // elastic force - // explicit elastic force - btScalar scale1 = scale * tetra.m_element_measure; - force[id0] -= scale1 * force_on_node0; - force[id1] -= scale1 * force_on_node123.getColumn(0); - force[id2] -= scale1 * force_on_node123.getColumn(1); - force[id3] -= scale1 * force_on_node123.getColumn(2); - } - } - } - - void firstPiola(const btMatrix3x3& F, btMatrix3x3& P) - { - // btMatrix3x3 JFinvT = F.adjoint(); - btScalar J = F.determinant(); - P = F.adjoint().transpose() * (m_lambda * (J-1)); - if (m_mu > SIMD_EPSILON) - { - btMatrix3x3 R,S; - if (J < 1024 * SIMD_EPSILON) - R.setIdentity(); - else - PolarDecomposition(F, R, S); // this QR is not robust, consider using implicit shift svd - /*https://fuchuyuan.github.io/research/svd/paper.pdf*/ - P += (F-R) * 2 * m_mu; - } - } - - virtual void addScaledElasticForceDifferential(btScalar scale, const TVStack& dx, TVStack& df) - { - } - - virtual void addScaledDampingForceDifferential(btScalar scale, const TVStack& dv, TVStack& df) - { - } - - virtual void buildDampingForceDifferentialDiagonal(btScalar scale, TVStack& diagA){} - - virtual btDeformableLagrangianForceType getForceType() - { - return BT_COROTATED_FORCE; - } - -}; + typedef btAlignedObjectArray<btVector3> TVStack; + btScalar m_mu, m_lambda; + btDeformableCorotatedForce() : m_mu(1), m_lambda(1) + { + } + + btDeformableCorotatedForce(btScalar mu, btScalar lambda) : m_mu(mu), m_lambda(lambda) + { + } + + virtual void addScaledForces(btScalar scale, TVStack& force) + { + addScaledElasticForce(scale, force); + } + + virtual void addScaledExplicitForce(btScalar scale, TVStack& force) + { + addScaledElasticForce(scale, force); + } + + virtual void addScaledDampingForce(btScalar scale, TVStack& force) + { + } + + virtual void addScaledElasticForce(btScalar scale, TVStack& force) + { + int numNodes = getNumNodes(); + btAssert(numNodes <= force.size()); + btVector3 grad_N_hat_1st_col = btVector3(-1, -1, -1); + for (int i = 0; i < m_softBodies.size(); ++i) + { + btSoftBody* psb = m_softBodies[i]; + for (int j = 0; j < psb->m_tetras.size(); ++j) + { + btSoftBody::Tetra& tetra = psb->m_tetras[j]; + btMatrix3x3 P; + firstPiola(tetra.m_F, P); + btVector3 force_on_node0 = P * (tetra.m_Dm_inverse.transpose() * grad_N_hat_1st_col); + btMatrix3x3 force_on_node123 = P * tetra.m_Dm_inverse.transpose(); + + btSoftBody::Node* node0 = tetra.m_n[0]; + btSoftBody::Node* node1 = tetra.m_n[1]; + btSoftBody::Node* node2 = tetra.m_n[2]; + btSoftBody::Node* node3 = tetra.m_n[3]; + size_t id0 = node0->index; + size_t id1 = node1->index; + size_t id2 = node2->index; + size_t id3 = node3->index; + // elastic force + // explicit elastic force + btScalar scale1 = scale * tetra.m_element_measure; + force[id0] -= scale1 * force_on_node0; + force[id1] -= scale1 * force_on_node123.getColumn(0); + force[id2] -= scale1 * force_on_node123.getColumn(1); + force[id3] -= scale1 * force_on_node123.getColumn(2); + } + } + } + + void firstPiola(const btMatrix3x3& F, btMatrix3x3& P) + { + // btMatrix3x3 JFinvT = F.adjoint(); + btScalar J = F.determinant(); + P = F.adjoint().transpose() * (m_lambda * (J - 1)); + if (m_mu > SIMD_EPSILON) + { + btMatrix3x3 R, S; + if (J < 1024 * SIMD_EPSILON) + R.setIdentity(); + else + PolarDecomposition(F, R, S); // this QR is not robust, consider using implicit shift svd + /*https://fuchuyuan.github.io/research/svd/paper.pdf*/ + P += (F - R) * 2 * m_mu; + } + } + + virtual void addScaledElasticForceDifferential(btScalar scale, const TVStack& dx, TVStack& df) + { + } + + virtual void addScaledDampingForceDifferential(btScalar scale, const TVStack& dv, TVStack& df) + { + } + + virtual void buildDampingForceDifferentialDiagonal(btScalar scale, TVStack& diagA) {} + + virtual btDeformableLagrangianForceType getForceType() + { + return BT_COROTATED_FORCE; + } +}; #endif /* btCorotated_h */ diff --git a/thirdparty/bullet/BulletSoftBody/btDeformableGravityForce.h b/thirdparty/bullet/BulletSoftBody/btDeformableGravityForce.h index 13ee3eacb6..d91867f457 100644 --- a/thirdparty/bullet/BulletSoftBody/btDeformableGravityForce.h +++ b/thirdparty/bullet/BulletSoftBody/btDeformableGravityForce.h @@ -21,87 +21,85 @@ class btDeformableGravityForce : public btDeformableLagrangianForce { public: - typedef btAlignedObjectArray<btVector3> TVStack; - btVector3 m_gravity; - - btDeformableGravityForce(const btVector3& g) : m_gravity(g) - { - } - - virtual void addScaledForces(btScalar scale, TVStack& force) - { - addScaledGravityForce(scale, force); - } - - virtual void addScaledExplicitForce(btScalar scale, TVStack& force) - { - addScaledGravityForce(scale, force); - } - - virtual void addScaledDampingForce(btScalar scale, TVStack& force) - { - } - - virtual void addScaledElasticForceDifferential(btScalar scale, const TVStack& dx, TVStack& df) - { - } - - virtual void addScaledDampingForceDifferential(btScalar scale, const TVStack& dv, TVStack& df) - { - } - - virtual void buildDampingForceDifferentialDiagonal(btScalar scale, TVStack& diagA){} - - virtual void addScaledGravityForce(btScalar scale, TVStack& force) - { - int numNodes = getNumNodes(); - btAssert(numNodes <= force.size()); - for (int i = 0; i < m_softBodies.size(); ++i) - { - btSoftBody* psb = m_softBodies[i]; - if (!psb->isActive()) - { - continue; - } - for (int j = 0; j < psb->m_nodes.size(); ++j) - { - btSoftBody::Node& n = psb->m_nodes[j]; - size_t id = n.index; - btScalar mass = (n.m_im == 0) ? 0 : 1. / n.m_im; - btVector3 scaled_force = scale * m_gravity * mass; - force[id] += scaled_force; - } - } - } - - virtual btDeformableLagrangianForceType getForceType() - { - return BT_GRAVITY_FORCE; - } + typedef btAlignedObjectArray<btVector3> TVStack; + btVector3 m_gravity; - // the gravitational potential energy - virtual double totalEnergy(btScalar dt) - { - double e = 0; - for (int i = 0; i<m_softBodies.size();++i) - { - btSoftBody* psb = m_softBodies[i]; - if (!psb->isActive()) - { - continue; - } - for (int j = 0; j < psb->m_nodes.size(); ++j) - { - const btSoftBody::Node& node = psb->m_nodes[j]; - if (node.m_im > 0) - { - e -= m_gravity.dot(node.m_q)/node.m_im; - } - } - } - return e; - } - - + btDeformableGravityForce(const btVector3& g) : m_gravity(g) + { + } + + virtual void addScaledForces(btScalar scale, TVStack& force) + { + addScaledGravityForce(scale, force); + } + + virtual void addScaledExplicitForce(btScalar scale, TVStack& force) + { + addScaledGravityForce(scale, force); + } + + virtual void addScaledDampingForce(btScalar scale, TVStack& force) + { + } + + virtual void addScaledElasticForceDifferential(btScalar scale, const TVStack& dx, TVStack& df) + { + } + + virtual void addScaledDampingForceDifferential(btScalar scale, const TVStack& dv, TVStack& df) + { + } + + virtual void buildDampingForceDifferentialDiagonal(btScalar scale, TVStack& diagA) {} + + virtual void addScaledGravityForce(btScalar scale, TVStack& force) + { + int numNodes = getNumNodes(); + btAssert(numNodes <= force.size()); + for (int i = 0; i < m_softBodies.size(); ++i) + { + btSoftBody* psb = m_softBodies[i]; + if (!psb->isActive()) + { + continue; + } + for (int j = 0; j < psb->m_nodes.size(); ++j) + { + btSoftBody::Node& n = psb->m_nodes[j]; + size_t id = n.index; + btScalar mass = (n.m_im == 0) ? 0 : 1. / n.m_im; + btVector3 scaled_force = scale * m_gravity * mass * m_softBodies[i]->m_gravityFactor; + force[id] += scaled_force; + } + } + } + + virtual btDeformableLagrangianForceType getForceType() + { + return BT_GRAVITY_FORCE; + } + + // the gravitational potential energy + virtual double totalEnergy(btScalar dt) + { + double e = 0; + for (int i = 0; i < m_softBodies.size(); ++i) + { + btSoftBody* psb = m_softBodies[i]; + if (!psb->isActive()) + { + continue; + } + for (int j = 0; j < psb->m_nodes.size(); ++j) + { + const btSoftBody::Node& node = psb->m_nodes[j]; + if (node.m_im > 0) + { + e -= m_gravity.dot(node.m_q) / node.m_im; + } + } + } + return e; + } }; #endif /* BT_DEFORMABLE_GRAVITY_FORCE_H */ diff --git a/thirdparty/bullet/BulletSoftBody/btDeformableLagrangianForce.h b/thirdparty/bullet/BulletSoftBody/btDeformableLagrangianForce.h index 0b6447442d..d58d825d1c 100644 --- a/thirdparty/bullet/BulletSoftBody/btDeformableLagrangianForce.h +++ b/thirdparty/bullet/BulletSoftBody/btDeformableLagrangianForce.h @@ -22,352 +22,351 @@ enum btDeformableLagrangianForceType { - BT_GRAVITY_FORCE = 1, - BT_MASSSPRING_FORCE = 2, - BT_COROTATED_FORCE = 3, - BT_NEOHOOKEAN_FORCE = 4, - BT_LINEAR_ELASTICITY_FORCE = 5, - BT_MOUSE_PICKING_FORCE = 6 + BT_GRAVITY_FORCE = 1, + BT_MASSSPRING_FORCE = 2, + BT_COROTATED_FORCE = 3, + BT_NEOHOOKEAN_FORCE = 4, + BT_LINEAR_ELASTICITY_FORCE = 5, + BT_MOUSE_PICKING_FORCE = 6 }; static inline double randomDouble(double low, double high) { - return low + static_cast<double>(rand()) / RAND_MAX * (high - low); + return low + static_cast<double>(rand()) / RAND_MAX * (high - low); } class btDeformableLagrangianForce { public: - typedef btAlignedObjectArray<btVector3> TVStack; - btAlignedObjectArray<btSoftBody *> m_softBodies; - const btAlignedObjectArray<btSoftBody::Node*>* m_nodes; - - btDeformableLagrangianForce() - { - } - - virtual ~btDeformableLagrangianForce(){} - - // add all forces - virtual void addScaledForces(btScalar scale, TVStack& force) = 0; - - // add damping df - virtual void addScaledDampingForceDifferential(btScalar scale, const TVStack& dv, TVStack& df) = 0; - - // build diagonal of A matrix - virtual void buildDampingForceDifferentialDiagonal(btScalar scale, TVStack& diagA) = 0; - - // add elastic df - virtual void addScaledElasticForceDifferential(btScalar scale, const TVStack& dx, TVStack& df) = 0; - - // add all forces that are explicit in explicit solve - virtual void addScaledExplicitForce(btScalar scale, TVStack& force) = 0; - - // add all damping forces - virtual void addScaledDampingForce(btScalar scale, TVStack& force) = 0; - - virtual btDeformableLagrangianForceType getForceType() = 0; - - virtual void reinitialize(bool nodeUpdated) - { - } - - // get number of nodes that have the force - virtual int getNumNodes() - { - int numNodes = 0; - for (int i = 0; i < m_softBodies.size(); ++i) - { - numNodes += m_softBodies[i]->m_nodes.size(); - } - return numNodes; - } - - // add a soft body to be affected by the particular lagrangian force - virtual void addSoftBody(btSoftBody* psb) - { - m_softBodies.push_back(psb); - } - - virtual void removeSoftBody(btSoftBody* psb) - { - m_softBodies.remove(psb); - } - - virtual void setIndices(const btAlignedObjectArray<btSoftBody::Node*>* nodes) - { - m_nodes = nodes; - } - - // Calculate the incremental deformable generated from the input dx - virtual btMatrix3x3 Ds(int id0, int id1, int id2, int id3, const TVStack& dx) - { - btVector3 c1 = dx[id1] - dx[id0]; - btVector3 c2 = dx[id2] - dx[id0]; - btVector3 c3 = dx[id3] - dx[id0]; - return btMatrix3x3(c1,c2,c3).transpose(); - } - - // Calculate the incremental deformable generated from the current velocity - virtual btMatrix3x3 DsFromVelocity(const btSoftBody::Node* n0, const btSoftBody::Node* n1, const btSoftBody::Node* n2, const btSoftBody::Node* n3) - { - btVector3 c1 = n1->m_v - n0->m_v; - btVector3 c2 = n2->m_v - n0->m_v; - btVector3 c3 = n3->m_v - n0->m_v; - return btMatrix3x3(c1,c2,c3).transpose(); - } - - // test for addScaledElasticForce function - virtual void testDerivative() - { - for (int i = 0; i<m_softBodies.size();++i) - { - btSoftBody* psb = m_softBodies[i]; - for (int j = 0; j < psb->m_nodes.size(); ++j) - { - psb->m_nodes[j].m_q += btVector3(randomDouble(-.1, .1), randomDouble(-.1, .1), randomDouble(-.1, .1)); - } - psb->updateDeformation(); - } - - TVStack dx; - dx.resize(getNumNodes()); - TVStack dphi_dx; - dphi_dx.resize(dx.size()); - for (int i =0; i < dphi_dx.size();++i) - { - dphi_dx[i].setZero(); - } - addScaledForces(-1, dphi_dx); - - // write down the current position - TVStack x; - x.resize(dx.size()); - int counter = 0; - for (int i = 0; i<m_softBodies.size();++i) - { - btSoftBody* psb = m_softBodies[i]; - for (int j = 0; j < psb->m_nodes.size(); ++j) - { - x[counter] = psb->m_nodes[j].m_q; - counter++; - } - } - counter = 0; - - // populate dx with random vectors - for (int i = 0; i < dx.size(); ++i) - { - dx[i].setX(randomDouble(-1, 1)); - dx[i].setY(randomDouble(-1, 1)); - dx[i].setZ(randomDouble(-1, 1)); - } - - btAlignedObjectArray<double> errors; - for (int it = 0; it < 10; ++it) - { - for (int i = 0; i < dx.size(); ++i) - { - dx[i] *= 0.5; - } - - // get dphi/dx * dx - double dphi = 0; - for (int i = 0; i < dx.size(); ++i) - { - dphi += dphi_dx[i].dot(dx[i]); - } - - - for (int i = 0; i<m_softBodies.size();++i) - { - btSoftBody* psb = m_softBodies[i]; - for (int j = 0; j < psb->m_nodes.size(); ++j) - { - psb->m_nodes[j].m_q = x[counter] + dx[counter]; - counter++; - } - psb->updateDeformation(); - } - counter = 0; - double f1 = totalElasticEnergy(0); - - for (int i = 0; i<m_softBodies.size();++i) - { - btSoftBody* psb = m_softBodies[i]; - for (int j = 0; j < psb->m_nodes.size(); ++j) - { - psb->m_nodes[j].m_q = x[counter] - dx[counter]; - counter++; - } - psb->updateDeformation(); - } - counter = 0; - - double f2 = totalElasticEnergy(0); - - //restore m_q - for (int i = 0; i<m_softBodies.size();++i) - { - btSoftBody* psb = m_softBodies[i]; - for (int j = 0; j < psb->m_nodes.size(); ++j) - { - psb->m_nodes[j].m_q = x[counter]; - counter++; - } - psb->updateDeformation(); - } - counter = 0; - double error = f1-f2-2*dphi; - errors.push_back(error); - std::cout << "Iteration = " << it <<", f1 = " << f1 << ", f2 = " << f2 << ", error = " << error << std::endl; - } - for (int i = 1; i < errors.size(); ++i) - { - std::cout << "Iteration = " << i << ", ratio = " << errors[i-1]/errors[i] << std::endl; - } - } - - // test for addScaledElasticForce function - virtual void testHessian() - { - for (int i = 0; i<m_softBodies.size();++i) - { - btSoftBody* psb = m_softBodies[i]; - for (int j = 0; j < psb->m_nodes.size(); ++j) - { - psb->m_nodes[j].m_q += btVector3(randomDouble(-.1, .1), randomDouble(-.1, .1), randomDouble(-.1, .1)); - } - psb->updateDeformation(); - } - - - TVStack dx; - dx.resize(getNumNodes()); - TVStack df; - df.resize(dx.size()); - TVStack f1; - f1.resize(dx.size()); - TVStack f2; - f2.resize(dx.size()); - - - // write down the current position - TVStack x; - x.resize(dx.size()); - int counter = 0; - for (int i = 0; i<m_softBodies.size();++i) - { - btSoftBody* psb = m_softBodies[i]; - for (int j = 0; j < psb->m_nodes.size(); ++j) - { - x[counter] = psb->m_nodes[j].m_q; - counter++; - } - } - counter = 0; - - // populate dx with random vectors - for (int i = 0; i < dx.size(); ++i) - { - dx[i].setX(randomDouble(-1, 1)); - dx[i].setY(randomDouble(-1, 1)); - dx[i].setZ(randomDouble(-1, 1)); - } - - btAlignedObjectArray<double> errors; - for (int it = 0; it < 10; ++it) - { - for (int i = 0; i < dx.size(); ++i) - { - dx[i] *= 0.5; - } - - // get df - for (int i =0; i < df.size();++i) - { - df[i].setZero(); - f1[i].setZero(); - f2[i].setZero(); - } - - //set df - addScaledElasticForceDifferential(-1, dx, df); - - for (int i = 0; i<m_softBodies.size();++i) - { - btSoftBody* psb = m_softBodies[i]; - for (int j = 0; j < psb->m_nodes.size(); ++j) - { - psb->m_nodes[j].m_q = x[counter] + dx[counter]; - counter++; - } - psb->updateDeformation(); - } - counter = 0; - - //set f1 - addScaledForces(-1, f1); - - for (int i = 0; i<m_softBodies.size();++i) - { - btSoftBody* psb = m_softBodies[i]; - for (int j = 0; j < psb->m_nodes.size(); ++j) - { - psb->m_nodes[j].m_q = x[counter] - dx[counter]; - counter++; - } - psb->updateDeformation(); - } - counter = 0; - - //set f2 - addScaledForces(-1, f2); - - //restore m_q - for (int i = 0; i<m_softBodies.size();++i) - { - btSoftBody* psb = m_softBodies[i]; - for (int j = 0; j < psb->m_nodes.size(); ++j) - { - psb->m_nodes[j].m_q = x[counter]; - counter++; - } - psb->updateDeformation(); - } - counter = 0; - double error = 0; - for (int i = 0; i < df.size();++i) - { - btVector3 error_vector = f1[i]-f2[i]-2*df[i]; - error += error_vector.length2(); - } - error = btSqrt(error); - errors.push_back(error); - std::cout << "Iteration = " << it << ", error = " << error << std::endl; - } - for (int i = 1; i < errors.size(); ++i) - { - std::cout << "Iteration = " << i << ", ratio = " << errors[i-1]/errors[i] << std::endl; - } - } - - // - virtual double totalElasticEnergy(btScalar dt) - { - return 0; - } - - // - virtual double totalDampingEnergy(btScalar dt) - { - return 0; - } - - // total Energy takes dt as input because certain energies depend on dt - virtual double totalEnergy(btScalar dt) - { - return totalElasticEnergy(dt) + totalDampingEnergy(dt); - } + typedef btAlignedObjectArray<btVector3> TVStack; + btAlignedObjectArray<btSoftBody*> m_softBodies; + const btAlignedObjectArray<btSoftBody::Node*>* m_nodes; + + btDeformableLagrangianForce() + { + } + + virtual ~btDeformableLagrangianForce() {} + + // add all forces + virtual void addScaledForces(btScalar scale, TVStack& force) = 0; + + // add damping df + virtual void addScaledDampingForceDifferential(btScalar scale, const TVStack& dv, TVStack& df) = 0; + + // build diagonal of A matrix + virtual void buildDampingForceDifferentialDiagonal(btScalar scale, TVStack& diagA) = 0; + + // add elastic df + virtual void addScaledElasticForceDifferential(btScalar scale, const TVStack& dx, TVStack& df) = 0; + + // add all forces that are explicit in explicit solve + virtual void addScaledExplicitForce(btScalar scale, TVStack& force) = 0; + + // add all damping forces + virtual void addScaledDampingForce(btScalar scale, TVStack& force) = 0; + + virtual void addScaledHessian(btScalar scale) {} + + virtual btDeformableLagrangianForceType getForceType() = 0; + + virtual void reinitialize(bool nodeUpdated) + { + } + + // get number of nodes that have the force + virtual int getNumNodes() + { + int numNodes = 0; + for (int i = 0; i < m_softBodies.size(); ++i) + { + numNodes += m_softBodies[i]->m_nodes.size(); + } + return numNodes; + } + + // add a soft body to be affected by the particular lagrangian force + virtual void addSoftBody(btSoftBody* psb) + { + m_softBodies.push_back(psb); + } + + virtual void removeSoftBody(btSoftBody* psb) + { + m_softBodies.remove(psb); + } + + virtual void setIndices(const btAlignedObjectArray<btSoftBody::Node*>* nodes) + { + m_nodes = nodes; + } + + // Calculate the incremental deformable generated from the input dx + virtual btMatrix3x3 Ds(int id0, int id1, int id2, int id3, const TVStack& dx) + { + btVector3 c1 = dx[id1] - dx[id0]; + btVector3 c2 = dx[id2] - dx[id0]; + btVector3 c3 = dx[id3] - dx[id0]; + return btMatrix3x3(c1, c2, c3).transpose(); + } + + // Calculate the incremental deformable generated from the current velocity + virtual btMatrix3x3 DsFromVelocity(const btSoftBody::Node* n0, const btSoftBody::Node* n1, const btSoftBody::Node* n2, const btSoftBody::Node* n3) + { + btVector3 c1 = n1->m_v - n0->m_v; + btVector3 c2 = n2->m_v - n0->m_v; + btVector3 c3 = n3->m_v - n0->m_v; + return btMatrix3x3(c1, c2, c3).transpose(); + } + + // test for addScaledElasticForce function + virtual void testDerivative() + { + for (int i = 0; i < m_softBodies.size(); ++i) + { + btSoftBody* psb = m_softBodies[i]; + for (int j = 0; j < psb->m_nodes.size(); ++j) + { + psb->m_nodes[j].m_q += btVector3(randomDouble(-.1, .1), randomDouble(-.1, .1), randomDouble(-.1, .1)); + } + psb->updateDeformation(); + } + + TVStack dx; + dx.resize(getNumNodes()); + TVStack dphi_dx; + dphi_dx.resize(dx.size()); + for (int i = 0; i < dphi_dx.size(); ++i) + { + dphi_dx[i].setZero(); + } + addScaledForces(-1, dphi_dx); + + // write down the current position + TVStack x; + x.resize(dx.size()); + int counter = 0; + for (int i = 0; i < m_softBodies.size(); ++i) + { + btSoftBody* psb = m_softBodies[i]; + for (int j = 0; j < psb->m_nodes.size(); ++j) + { + x[counter] = psb->m_nodes[j].m_q; + counter++; + } + } + counter = 0; + + // populate dx with random vectors + for (int i = 0; i < dx.size(); ++i) + { + dx[i].setX(randomDouble(-1, 1)); + dx[i].setY(randomDouble(-1, 1)); + dx[i].setZ(randomDouble(-1, 1)); + } + + btAlignedObjectArray<double> errors; + for (int it = 0; it < 10; ++it) + { + for (int i = 0; i < dx.size(); ++i) + { + dx[i] *= 0.5; + } + + // get dphi/dx * dx + double dphi = 0; + for (int i = 0; i < dx.size(); ++i) + { + dphi += dphi_dx[i].dot(dx[i]); + } + + for (int i = 0; i < m_softBodies.size(); ++i) + { + btSoftBody* psb = m_softBodies[i]; + for (int j = 0; j < psb->m_nodes.size(); ++j) + { + psb->m_nodes[j].m_q = x[counter] + dx[counter]; + counter++; + } + psb->updateDeformation(); + } + counter = 0; + double f1 = totalElasticEnergy(0); + + for (int i = 0; i < m_softBodies.size(); ++i) + { + btSoftBody* psb = m_softBodies[i]; + for (int j = 0; j < psb->m_nodes.size(); ++j) + { + psb->m_nodes[j].m_q = x[counter] - dx[counter]; + counter++; + } + psb->updateDeformation(); + } + counter = 0; + + double f2 = totalElasticEnergy(0); + + //restore m_q + for (int i = 0; i < m_softBodies.size(); ++i) + { + btSoftBody* psb = m_softBodies[i]; + for (int j = 0; j < psb->m_nodes.size(); ++j) + { + psb->m_nodes[j].m_q = x[counter]; + counter++; + } + psb->updateDeformation(); + } + counter = 0; + double error = f1 - f2 - 2 * dphi; + errors.push_back(error); + std::cout << "Iteration = " << it << ", f1 = " << f1 << ", f2 = " << f2 << ", error = " << error << std::endl; + } + for (int i = 1; i < errors.size(); ++i) + { + std::cout << "Iteration = " << i << ", ratio = " << errors[i - 1] / errors[i] << std::endl; + } + } + + // test for addScaledElasticForce function + virtual void testHessian() + { + for (int i = 0; i < m_softBodies.size(); ++i) + { + btSoftBody* psb = m_softBodies[i]; + for (int j = 0; j < psb->m_nodes.size(); ++j) + { + psb->m_nodes[j].m_q += btVector3(randomDouble(-.1, .1), randomDouble(-.1, .1), randomDouble(-.1, .1)); + } + psb->updateDeformation(); + } + + TVStack dx; + dx.resize(getNumNodes()); + TVStack df; + df.resize(dx.size()); + TVStack f1; + f1.resize(dx.size()); + TVStack f2; + f2.resize(dx.size()); + + // write down the current position + TVStack x; + x.resize(dx.size()); + int counter = 0; + for (int i = 0; i < m_softBodies.size(); ++i) + { + btSoftBody* psb = m_softBodies[i]; + for (int j = 0; j < psb->m_nodes.size(); ++j) + { + x[counter] = psb->m_nodes[j].m_q; + counter++; + } + } + counter = 0; + + // populate dx with random vectors + for (int i = 0; i < dx.size(); ++i) + { + dx[i].setX(randomDouble(-1, 1)); + dx[i].setY(randomDouble(-1, 1)); + dx[i].setZ(randomDouble(-1, 1)); + } + + btAlignedObjectArray<double> errors; + for (int it = 0; it < 10; ++it) + { + for (int i = 0; i < dx.size(); ++i) + { + dx[i] *= 0.5; + } + + // get df + for (int i = 0; i < df.size(); ++i) + { + df[i].setZero(); + f1[i].setZero(); + f2[i].setZero(); + } + + //set df + addScaledElasticForceDifferential(-1, dx, df); + + for (int i = 0; i < m_softBodies.size(); ++i) + { + btSoftBody* psb = m_softBodies[i]; + for (int j = 0; j < psb->m_nodes.size(); ++j) + { + psb->m_nodes[j].m_q = x[counter] + dx[counter]; + counter++; + } + psb->updateDeformation(); + } + counter = 0; + + //set f1 + addScaledForces(-1, f1); + + for (int i = 0; i < m_softBodies.size(); ++i) + { + btSoftBody* psb = m_softBodies[i]; + for (int j = 0; j < psb->m_nodes.size(); ++j) + { + psb->m_nodes[j].m_q = x[counter] - dx[counter]; + counter++; + } + psb->updateDeformation(); + } + counter = 0; + + //set f2 + addScaledForces(-1, f2); + + //restore m_q + for (int i = 0; i < m_softBodies.size(); ++i) + { + btSoftBody* psb = m_softBodies[i]; + for (int j = 0; j < psb->m_nodes.size(); ++j) + { + psb->m_nodes[j].m_q = x[counter]; + counter++; + } + psb->updateDeformation(); + } + counter = 0; + double error = 0; + for (int i = 0; i < df.size(); ++i) + { + btVector3 error_vector = f1[i] - f2[i] - 2 * df[i]; + error += error_vector.length2(); + } + error = btSqrt(error); + errors.push_back(error); + std::cout << "Iteration = " << it << ", error = " << error << std::endl; + } + for (int i = 1; i < errors.size(); ++i) + { + std::cout << "Iteration = " << i << ", ratio = " << errors[i - 1] / errors[i] << std::endl; + } + } + + // + virtual double totalElasticEnergy(btScalar dt) + { + return 0; + } + + // + virtual double totalDampingEnergy(btScalar dt) + { + return 0; + } + + // total Energy takes dt as input because certain energies depend on dt + virtual double totalEnergy(btScalar dt) + { + return totalElasticEnergy(dt) + totalDampingEnergy(dt); + } }; #endif /* BT_DEFORMABLE_LAGRANGIAN_FORCE */ diff --git a/thirdparty/bullet/BulletSoftBody/btDeformableLinearElasticityForce.h b/thirdparty/bullet/BulletSoftBody/btDeformableLinearElasticityForce.h index 106dc10ad6..971192050b 100644 --- a/thirdparty/bullet/BulletSoftBody/btDeformableLinearElasticityForce.h +++ b/thirdparty/bullet/BulletSoftBody/btDeformableLinearElasticityForce.h @@ -18,323 +18,445 @@ #include "btDeformableLagrangianForce.h" #include "LinearMath/btQuickprof.h" +#include "btSoftBodyInternals.h" +#define TETRA_FLAT_THRESHOLD 0.01 class btDeformableLinearElasticityForce : public btDeformableLagrangianForce { public: - typedef btAlignedObjectArray<btVector3> TVStack; - btScalar m_mu, m_lambda; - btScalar m_mu_damp, m_lambda_damp; - btDeformableLinearElasticityForce(): m_mu(1), m_lambda(1) - { - btScalar damping = 0.05; - m_mu_damp = damping * m_mu; - m_lambda_damp = damping * m_lambda; - } - - btDeformableLinearElasticityForce(btScalar mu, btScalar lambda, btScalar damping = 0.05): m_mu(mu), m_lambda(lambda) - { - m_mu_damp = damping * m_mu; - m_lambda_damp = damping * m_lambda; - } - - virtual void addScaledForces(btScalar scale, TVStack& force) - { - addScaledDampingForce(scale, force); - addScaledElasticForce(scale, force); - } - - virtual void addScaledExplicitForce(btScalar scale, TVStack& force) - { - addScaledElasticForce(scale, force); - } - - // The damping matrix is calculated using the time n state as described in https://www.math.ucla.edu/~jteran/papers/GSSJT15.pdf to allow line search - virtual void addScaledDampingForce(btScalar scale, TVStack& force) - { - if (m_mu_damp == 0 && m_lambda_damp == 0) - return; - int numNodes = getNumNodes(); - btAssert(numNodes <= force.size()); - btVector3 grad_N_hat_1st_col = btVector3(-1,-1,-1); - for (int i = 0; i < m_softBodies.size(); ++i) - { - btSoftBody* psb = m_softBodies[i]; - if (!psb->isActive()) - { - continue; - } - for (int j = 0; j < psb->m_tetras.size(); ++j) - { - btSoftBody::Tetra& tetra = psb->m_tetras[j]; - btSoftBody::Node* node0 = tetra.m_n[0]; - btSoftBody::Node* node1 = tetra.m_n[1]; - btSoftBody::Node* node2 = tetra.m_n[2]; - btSoftBody::Node* node3 = tetra.m_n[3]; - size_t id0 = node0->index; - size_t id1 = node1->index; - size_t id2 = node2->index; - size_t id3 = node3->index; - btMatrix3x3 dF = DsFromVelocity(node0, node1, node2, node3) * tetra.m_Dm_inverse; - btMatrix3x3 I; - I.setIdentity(); - btMatrix3x3 dP = (dF + dF.transpose()) * m_mu_damp + I * (dF[0][0]+dF[1][1]+dF[2][2]) * m_lambda_damp; - // firstPiolaDampingDifferential(psb->m_tetraScratchesTn[j], dF, dP); - btVector3 df_on_node0 = dP * (tetra.m_Dm_inverse.transpose()*grad_N_hat_1st_col); - btMatrix3x3 df_on_node123 = dP * tetra.m_Dm_inverse.transpose(); - - // damping force differential - btScalar scale1 = scale * tetra.m_element_measure; - force[id0] -= scale1 * df_on_node0; - force[id1] -= scale1 * df_on_node123.getColumn(0); - force[id2] -= scale1 * df_on_node123.getColumn(1); - force[id3] -= scale1 * df_on_node123.getColumn(2); - } - } - } - - virtual double totalElasticEnergy(btScalar dt) - { - double energy = 0; - for (int i = 0; i < m_softBodies.size(); ++i) - { - btSoftBody* psb = m_softBodies[i]; - if (!psb->isActive()) - { - continue; - } - for (int j = 0; j < psb->m_tetraScratches.size(); ++j) - { - btSoftBody::Tetra& tetra = psb->m_tetras[j]; - btSoftBody::TetraScratch& s = psb->m_tetraScratches[j]; - energy += tetra.m_element_measure * elasticEnergyDensity(s); - } - } - return energy; - } - - // The damping energy is formulated as in https://www.math.ucla.edu/~jteran/papers/GSSJT15.pdf to allow line search - virtual double totalDampingEnergy(btScalar dt) - { - double energy = 0; - int sz = 0; - for (int i = 0; i < m_softBodies.size(); ++i) - { - btSoftBody* psb = m_softBodies[i]; - if (!psb->isActive()) - { - continue; - } - for (int j = 0; j < psb->m_nodes.size(); ++j) - { - sz = btMax(sz, psb->m_nodes[j].index); - } - } - TVStack dampingForce; - dampingForce.resize(sz+1); - for (int i = 0; i < dampingForce.size(); ++i) - dampingForce[i].setZero(); - addScaledDampingForce(0.5, dampingForce); - for (int i = 0; i < m_softBodies.size(); ++i) - { - btSoftBody* psb = m_softBodies[i]; - for (int j = 0; j < psb->m_nodes.size(); ++j) - { - const btSoftBody::Node& node = psb->m_nodes[j]; - energy -= dampingForce[node.index].dot(node.m_v) / dt; - } - } - return energy; - } - - double elasticEnergyDensity(const btSoftBody::TetraScratch& s) - { - double density = 0; - btMatrix3x3 epsilon = (s.m_F + s.m_F.transpose()) * 0.5 - btMatrix3x3::getIdentity(); - btScalar trace = epsilon[0][0] + epsilon[1][1] + epsilon[2][2]; - density += m_mu * (epsilon[0].length2() + epsilon[1].length2() + epsilon[2].length2()); - density += m_lambda * trace * trace * 0.5; - return density; - } - - virtual void addScaledElasticForce(btScalar scale, TVStack& force) - { - int numNodes = getNumNodes(); - btAssert(numNodes <= force.size()); - btVector3 grad_N_hat_1st_col = btVector3(-1,-1,-1); - for (int i = 0; i < m_softBodies.size(); ++i) - { - btSoftBody* psb = m_softBodies[i]; - if (!psb->isActive()) - { - continue; - } - btScalar max_p = psb->m_cfg.m_maxStress; - for (int j = 0; j < psb->m_tetras.size(); ++j) - { - btSoftBody::Tetra& tetra = psb->m_tetras[j]; - btMatrix3x3 P; - firstPiola(psb->m_tetraScratches[j],P); + typedef btAlignedObjectArray<btVector3> TVStack; + btScalar m_mu, m_lambda; + btScalar m_E, m_nu; // Young's modulus and Poisson ratio + btScalar m_damping_alpha, m_damping_beta; + btDeformableLinearElasticityForce() : m_mu(1), m_lambda(1), m_damping_alpha(0.01), m_damping_beta(0.01) + { + updateYoungsModulusAndPoissonRatio(); + } + + btDeformableLinearElasticityForce(btScalar mu, btScalar lambda, btScalar damping_alpha = 0.01, btScalar damping_beta = 0.01) : m_mu(mu), m_lambda(lambda), m_damping_alpha(damping_alpha), m_damping_beta(damping_beta) + { + updateYoungsModulusAndPoissonRatio(); + } + + void updateYoungsModulusAndPoissonRatio() + { + // conversion from Lame Parameters to Young's modulus and Poisson ratio + // https://en.wikipedia.org/wiki/Lam%C3%A9_parameters + m_E = m_mu * (3 * m_lambda + 2 * m_mu) / (m_lambda + m_mu); + m_nu = m_lambda * 0.5 / (m_mu + m_lambda); + } + + void updateLameParameters() + { + // conversion from Young's modulus and Poisson ratio to Lame Parameters + // https://en.wikipedia.org/wiki/Lam%C3%A9_parameters + m_mu = m_E * 0.5 / (1 + m_nu); + m_lambda = m_E * m_nu / ((1 + m_nu) * (1 - 2 * m_nu)); + } + + void setYoungsModulus(btScalar E) + { + m_E = E; + updateLameParameters(); + } + + void setPoissonRatio(btScalar nu) + { + m_nu = nu; + updateLameParameters(); + } + + void setDamping(btScalar damping_alpha, btScalar damping_beta) + { + m_damping_alpha = damping_alpha; + m_damping_beta = damping_beta; + } + + void setLameParameters(btScalar mu, btScalar lambda) + { + m_mu = mu; + m_lambda = lambda; + updateYoungsModulusAndPoissonRatio(); + } + + virtual void addScaledForces(btScalar scale, TVStack& force) + { + addScaledDampingForce(scale, force); + addScaledElasticForce(scale, force); + } + + virtual void addScaledExplicitForce(btScalar scale, TVStack& force) + { + addScaledElasticForce(scale, force); + } + + // The damping matrix is calculated using the time n state as described in https://www.math.ucla.edu/~jteran/papers/GSSJT15.pdf to allow line search + virtual void addScaledDampingForce(btScalar scale, TVStack& force) + { + if (m_damping_alpha == 0 && m_damping_beta == 0) + return; + btScalar mu_damp = m_damping_beta * m_mu; + btScalar lambda_damp = m_damping_beta * m_lambda; + int numNodes = getNumNodes(); + btAssert(numNodes <= force.size()); + btVector3 grad_N_hat_1st_col = btVector3(-1, -1, -1); + for (int i = 0; i < m_softBodies.size(); ++i) + { + btSoftBody* psb = m_softBodies[i]; + if (!psb->isActive()) + { + continue; + } + for (int j = 0; j < psb->m_tetras.size(); ++j) + { + bool close_to_flat = (psb->m_tetraScratches[j].m_J < TETRA_FLAT_THRESHOLD); + btSoftBody::Tetra& tetra = psb->m_tetras[j]; + btSoftBody::Node* node0 = tetra.m_n[0]; + btSoftBody::Node* node1 = tetra.m_n[1]; + btSoftBody::Node* node2 = tetra.m_n[2]; + btSoftBody::Node* node3 = tetra.m_n[3]; + size_t id0 = node0->index; + size_t id1 = node1->index; + size_t id2 = node2->index; + size_t id3 = node3->index; + btMatrix3x3 dF = DsFromVelocity(node0, node1, node2, node3) * tetra.m_Dm_inverse; + if (!close_to_flat) + { + dF = psb->m_tetraScratches[j].m_corotation.transpose() * dF; + } + btMatrix3x3 I; + I.setIdentity(); + btMatrix3x3 dP = (dF + dF.transpose()) * mu_damp + I * ((dF[0][0] + dF[1][1] + dF[2][2]) * lambda_damp); + btMatrix3x3 df_on_node123 = dP * tetra.m_Dm_inverse.transpose(); + if (!close_to_flat) + { + df_on_node123 = psb->m_tetraScratches[j].m_corotation * df_on_node123; + } + btVector3 df_on_node0 = df_on_node123 * grad_N_hat_1st_col; + // damping force differential + btScalar scale1 = scale * tetra.m_element_measure; + force[id0] -= scale1 * df_on_node0; + force[id1] -= scale1 * df_on_node123.getColumn(0); + force[id2] -= scale1 * df_on_node123.getColumn(1); + force[id3] -= scale1 * df_on_node123.getColumn(2); + } + for (int j = 0; j < psb->m_nodes.size(); ++j) + { + const btSoftBody::Node& node = psb->m_nodes[j]; + size_t id = node.index; + if (node.m_im > 0) + { + force[id] -= scale * node.m_v / node.m_im * m_damping_alpha; + } + } + } + } + + virtual double totalElasticEnergy(btScalar dt) + { + double energy = 0; + for (int i = 0; i < m_softBodies.size(); ++i) + { + btSoftBody* psb = m_softBodies[i]; + if (!psb->isActive()) + { + continue; + } + for (int j = 0; j < psb->m_tetraScratches.size(); ++j) + { + btSoftBody::Tetra& tetra = psb->m_tetras[j]; + btSoftBody::TetraScratch& s = psb->m_tetraScratches[j]; + energy += tetra.m_element_measure * elasticEnergyDensity(s); + } + } + return energy; + } + + // The damping energy is formulated as in https://www.math.ucla.edu/~jteran/papers/GSSJT15.pdf to allow line search + virtual double totalDampingEnergy(btScalar dt) + { + double energy = 0; + int sz = 0; + for (int i = 0; i < m_softBodies.size(); ++i) + { + btSoftBody* psb = m_softBodies[i]; + if (!psb->isActive()) + { + continue; + } + for (int j = 0; j < psb->m_nodes.size(); ++j) + { + sz = btMax(sz, psb->m_nodes[j].index); + } + } + TVStack dampingForce; + dampingForce.resize(sz + 1); + for (int i = 0; i < dampingForce.size(); ++i) + dampingForce[i].setZero(); + addScaledDampingForce(0.5, dampingForce); + for (int i = 0; i < m_softBodies.size(); ++i) + { + btSoftBody* psb = m_softBodies[i]; + for (int j = 0; j < psb->m_nodes.size(); ++j) + { + const btSoftBody::Node& node = psb->m_nodes[j]; + energy -= dampingForce[node.index].dot(node.m_v) / dt; + } + } + return energy; + } + + double elasticEnergyDensity(const btSoftBody::TetraScratch& s) + { + double density = 0; + btMatrix3x3 epsilon = (s.m_F + s.m_F.transpose()) * 0.5 - btMatrix3x3::getIdentity(); + btScalar trace = epsilon[0][0] + epsilon[1][1] + epsilon[2][2]; + density += m_mu * (epsilon[0].length2() + epsilon[1].length2() + epsilon[2].length2()); + density += m_lambda * trace * trace * 0.5; + return density; + } + + virtual void addScaledElasticForce(btScalar scale, TVStack& force) + { + int numNodes = getNumNodes(); + btAssert(numNodes <= force.size()); + btVector3 grad_N_hat_1st_col = btVector3(-1, -1, -1); + for (int i = 0; i < m_softBodies.size(); ++i) + { + btSoftBody* psb = m_softBodies[i]; + if (!psb->isActive()) + { + continue; + } + btScalar max_p = psb->m_cfg.m_maxStress; + for (int j = 0; j < psb->m_tetras.size(); ++j) + { + btSoftBody::Tetra& tetra = psb->m_tetras[j]; + btMatrix3x3 P; + firstPiola(psb->m_tetraScratches[j], P); #if USE_SVD - if (max_p > 0) - { - // since we want to clamp the principal stress to max_p, we only need to - // calculate SVD when sigma_0^2 + sigma_1^2 + sigma_2^2 > max_p * max_p - btScalar trPTP = (P[0].length2() + P[1].length2() + P[2].length2()); - if (trPTP > max_p * max_p) - { - btMatrix3x3 U, V; - btVector3 sigma; - singularValueDecomposition(P, U, sigma, V); - sigma[0] = btMin(sigma[0], max_p); - sigma[1] = btMin(sigma[1], max_p); - sigma[2] = btMin(sigma[2], max_p); - sigma[0] = btMax(sigma[0], -max_p); - sigma[1] = btMax(sigma[1], -max_p); - sigma[2] = btMax(sigma[2], -max_p); - btMatrix3x3 Sigma; - Sigma.setIdentity(); - Sigma[0][0] = sigma[0]; - Sigma[1][1] = sigma[1]; - Sigma[2][2] = sigma[2]; - P = U * Sigma * V.transpose(); - } - } + if (max_p > 0) + { + // since we want to clamp the principal stress to max_p, we only need to + // calculate SVD when sigma_0^2 + sigma_1^2 + sigma_2^2 > max_p * max_p + btScalar trPTP = (P[0].length2() + P[1].length2() + P[2].length2()); + if (trPTP > max_p * max_p) + { + btMatrix3x3 U, V; + btVector3 sigma; + singularValueDecomposition(P, U, sigma, V); + sigma[0] = btMin(sigma[0], max_p); + sigma[1] = btMin(sigma[1], max_p); + sigma[2] = btMin(sigma[2], max_p); + sigma[0] = btMax(sigma[0], -max_p); + sigma[1] = btMax(sigma[1], -max_p); + sigma[2] = btMax(sigma[2], -max_p); + btMatrix3x3 Sigma; + Sigma.setIdentity(); + Sigma[0][0] = sigma[0]; + Sigma[1][1] = sigma[1]; + Sigma[2][2] = sigma[2]; + P = U * Sigma * V.transpose(); + } + } #endif - // btVector3 force_on_node0 = P * (tetra.m_Dm_inverse.transpose()*grad_N_hat_1st_col); - btMatrix3x3 force_on_node123 = P * tetra.m_Dm_inverse.transpose(); - btVector3 force_on_node0 = force_on_node123 * grad_N_hat_1st_col; - - btSoftBody::Node* node0 = tetra.m_n[0]; - btSoftBody::Node* node1 = tetra.m_n[1]; - btSoftBody::Node* node2 = tetra.m_n[2]; - btSoftBody::Node* node3 = tetra.m_n[3]; - size_t id0 = node0->index; - size_t id1 = node1->index; - size_t id2 = node2->index; - size_t id3 = node3->index; - - // elastic force - btScalar scale1 = scale * tetra.m_element_measure; - force[id0] -= scale1 * force_on_node0; - force[id1] -= scale1 * force_on_node123.getColumn(0); - force[id2] -= scale1 * force_on_node123.getColumn(1); - force[id3] -= scale1 * force_on_node123.getColumn(2); - } - } - } - - // The damping matrix is calculated using the time n state as described in https://www.math.ucla.edu/~jteran/papers/GSSJT15.pdf to allow line search - virtual void addScaledDampingForceDifferential(btScalar scale, const TVStack& dv, TVStack& df) - { - if (m_mu_damp == 0 && m_lambda_damp == 0) - return; - int numNodes = getNumNodes(); - btAssert(numNodes <= df.size()); - btVector3 grad_N_hat_1st_col = btVector3(-1,-1,-1); - for (int i = 0; i < m_softBodies.size(); ++i) - { - btSoftBody* psb = m_softBodies[i]; - if (!psb->isActive()) - { - continue; - } - for (int j = 0; j < psb->m_tetras.size(); ++j) - { - btSoftBody::Tetra& tetra = psb->m_tetras[j]; - btSoftBody::Node* node0 = tetra.m_n[0]; - btSoftBody::Node* node1 = tetra.m_n[1]; - btSoftBody::Node* node2 = tetra.m_n[2]; - btSoftBody::Node* node3 = tetra.m_n[3]; - size_t id0 = node0->index; - size_t id1 = node1->index; - size_t id2 = node2->index; - size_t id3 = node3->index; - btMatrix3x3 dF = Ds(id0, id1, id2, id3, dv) * tetra.m_Dm_inverse; - btMatrix3x3 I; - I.setIdentity(); - btMatrix3x3 dP = (dF + dF.transpose()) * m_mu_damp + I * (dF[0][0]+dF[1][1]+dF[2][2]) * m_lambda_damp; - // firstPiolaDampingDifferential(psb->m_tetraScratchesTn[j], dF, dP); - // btVector3 df_on_node0 = dP * (tetra.m_Dm_inverse.transpose()*grad_N_hat_1st_col); - btMatrix3x3 df_on_node123 = dP * tetra.m_Dm_inverse.transpose(); - btVector3 df_on_node0 = df_on_node123 * grad_N_hat_1st_col; - - // damping force differential - btScalar scale1 = scale * tetra.m_element_measure; - df[id0] -= scale1 * df_on_node0; - df[id1] -= scale1 * df_on_node123.getColumn(0); - df[id2] -= scale1 * df_on_node123.getColumn(1); - df[id3] -= scale1 * df_on_node123.getColumn(2); - } - } - } - - virtual void addScaledElasticForceDifferential(btScalar scale, const TVStack& dx, TVStack& df) - { - int numNodes = getNumNodes(); - btAssert(numNodes <= df.size()); - btVector3 grad_N_hat_1st_col = btVector3(-1,-1,-1); - for (int i = 0; i < m_softBodies.size(); ++i) - { - btSoftBody* psb = m_softBodies[i]; - if (!psb->isActive()) - { - continue; - } - for (int j = 0; j < psb->m_tetras.size(); ++j) - { - btSoftBody::Tetra& tetra = psb->m_tetras[j]; - btSoftBody::Node* node0 = tetra.m_n[0]; - btSoftBody::Node* node1 = tetra.m_n[1]; - btSoftBody::Node* node2 = tetra.m_n[2]; - btSoftBody::Node* node3 = tetra.m_n[3]; - size_t id0 = node0->index; - size_t id1 = node1->index; - size_t id2 = node2->index; - size_t id3 = node3->index; - btMatrix3x3 dF = Ds(id0, id1, id2, id3, dx) * tetra.m_Dm_inverse; - btMatrix3x3 dP; - firstPiolaDifferential(psb->m_tetraScratches[j], dF, dP); - // btVector3 df_on_node0 = dP * (tetra.m_Dm_inverse.transpose()*grad_N_hat_1st_col); - btMatrix3x3 df_on_node123 = dP * tetra.m_Dm_inverse.transpose(); - btVector3 df_on_node0 = df_on_node123 * grad_N_hat_1st_col; - - // elastic force differential - btScalar scale1 = scale * tetra.m_element_measure; - df[id0] -= scale1 * df_on_node0; - df[id1] -= scale1 * df_on_node123.getColumn(0); - df[id2] -= scale1 * df_on_node123.getColumn(1); - df[id3] -= scale1 * df_on_node123.getColumn(2); - } - } - } - - void firstPiola(const btSoftBody::TetraScratch& s, btMatrix3x3& P) - { - btMatrix3x3 epsilon = (s.m_F + s.m_F.transpose()) * 0.5 - btMatrix3x3::getIdentity(); - btScalar trace = epsilon[0][0] + epsilon[1][1] + epsilon[2][2]; - P = epsilon * btScalar(2) * m_mu + btMatrix3x3::getIdentity() * m_lambda * trace; - } - - // Let P be the first piola stress. - // This function calculates the dP = dP/dF * dF - void firstPiolaDifferential(const btSoftBody::TetraScratch& s, const btMatrix3x3& dF, btMatrix3x3& dP) - { - btScalar trace = (dF[0][0] + dF[1][1] + dF[2][2]); - dP = (dF + dF.transpose()) * m_mu + btMatrix3x3::getIdentity() * m_lambda * trace; - } - - // Let Q be the damping stress. - // This function calculates the dP = dQ/dF * dF - void firstPiolaDampingDifferential(const btSoftBody::TetraScratch& s, const btMatrix3x3& dF, btMatrix3x3& dP) - { - btScalar trace = (dF[0][0] + dF[1][1] + dF[2][2]); - dP = (dF + dF.transpose()) * m_mu_damp + btMatrix3x3::getIdentity() * m_lambda_damp * trace; - } - - virtual btDeformableLagrangianForceType getForceType() - { - return BT_LINEAR_ELASTICITY_FORCE; - } - + // btVector3 force_on_node0 = P * (tetra.m_Dm_inverse.transpose()*grad_N_hat_1st_col); + btMatrix3x3 force_on_node123 = psb->m_tetraScratches[j].m_corotation * P * tetra.m_Dm_inverse.transpose(); + btVector3 force_on_node0 = force_on_node123 * grad_N_hat_1st_col; + + btSoftBody::Node* node0 = tetra.m_n[0]; + btSoftBody::Node* node1 = tetra.m_n[1]; + btSoftBody::Node* node2 = tetra.m_n[2]; + btSoftBody::Node* node3 = tetra.m_n[3]; + size_t id0 = node0->index; + size_t id1 = node1->index; + size_t id2 = node2->index; + size_t id3 = node3->index; + + // elastic force + btScalar scale1 = scale * tetra.m_element_measure; + force[id0] -= scale1 * force_on_node0; + force[id1] -= scale1 * force_on_node123.getColumn(0); + force[id2] -= scale1 * force_on_node123.getColumn(1); + force[id3] -= scale1 * force_on_node123.getColumn(2); + } + } + } + + virtual void buildDampingForceDifferentialDiagonal(btScalar scale, TVStack& diagA) {} + + // The damping matrix is calculated using the time n state as described in https://www.math.ucla.edu/~jteran/papers/GSSJT15.pdf to allow line search + virtual void addScaledDampingForceDifferential(btScalar scale, const TVStack& dv, TVStack& df) + { + if (m_damping_alpha == 0 && m_damping_beta == 0) + return; + btScalar mu_damp = m_damping_beta * m_mu; + btScalar lambda_damp = m_damping_beta * m_lambda; + int numNodes = getNumNodes(); + btAssert(numNodes <= df.size()); + btVector3 grad_N_hat_1st_col = btVector3(-1, -1, -1); + for (int i = 0; i < m_softBodies.size(); ++i) + { + btSoftBody* psb = m_softBodies[i]; + if (!psb->isActive()) + { + continue; + } + for (int j = 0; j < psb->m_tetras.size(); ++j) + { + bool close_to_flat = (psb->m_tetraScratches[j].m_J < TETRA_FLAT_THRESHOLD); + btSoftBody::Tetra& tetra = psb->m_tetras[j]; + btSoftBody::Node* node0 = tetra.m_n[0]; + btSoftBody::Node* node1 = tetra.m_n[1]; + btSoftBody::Node* node2 = tetra.m_n[2]; + btSoftBody::Node* node3 = tetra.m_n[3]; + size_t id0 = node0->index; + size_t id1 = node1->index; + size_t id2 = node2->index; + size_t id3 = node3->index; + btMatrix3x3 dF = Ds(id0, id1, id2, id3, dv) * tetra.m_Dm_inverse; + if (!close_to_flat) + { + dF = psb->m_tetraScratches[j].m_corotation.transpose() * dF; + } + btMatrix3x3 I; + I.setIdentity(); + btMatrix3x3 dP = (dF + dF.transpose()) * mu_damp + I * ((dF[0][0] + dF[1][1] + dF[2][2]) * lambda_damp); + btMatrix3x3 df_on_node123 = dP * tetra.m_Dm_inverse.transpose(); + if (!close_to_flat) + { + df_on_node123 = psb->m_tetraScratches[j].m_corotation * df_on_node123; + } + btVector3 df_on_node0 = df_on_node123 * grad_N_hat_1st_col; + + // damping force differential + btScalar scale1 = scale * tetra.m_element_measure; + df[id0] -= scale1 * df_on_node0; + df[id1] -= scale1 * df_on_node123.getColumn(0); + df[id2] -= scale1 * df_on_node123.getColumn(1); + df[id3] -= scale1 * df_on_node123.getColumn(2); + } + for (int j = 0; j < psb->m_nodes.size(); ++j) + { + const btSoftBody::Node& node = psb->m_nodes[j]; + size_t id = node.index; + if (node.m_im > 0) + { + df[id] -= scale * dv[id] / node.m_im * m_damping_alpha; + } + } + } + } + + virtual void addScaledElasticForceDifferential(btScalar scale, const TVStack& dx, TVStack& df) + { + int numNodes = getNumNodes(); + btAssert(numNodes <= df.size()); + btVector3 grad_N_hat_1st_col = btVector3(-1, -1, -1); + for (int i = 0; i < m_softBodies.size(); ++i) + { + btSoftBody* psb = m_softBodies[i]; + if (!psb->isActive()) + { + continue; + } + for (int j = 0; j < psb->m_tetras.size(); ++j) + { + btSoftBody::Tetra& tetra = psb->m_tetras[j]; + btSoftBody::Node* node0 = tetra.m_n[0]; + btSoftBody::Node* node1 = tetra.m_n[1]; + btSoftBody::Node* node2 = tetra.m_n[2]; + btSoftBody::Node* node3 = tetra.m_n[3]; + size_t id0 = node0->index; + size_t id1 = node1->index; + size_t id2 = node2->index; + size_t id3 = node3->index; + btMatrix3x3 dF = psb->m_tetraScratches[j].m_corotation.transpose() * Ds(id0, id1, id2, id3, dx) * tetra.m_Dm_inverse; + btMatrix3x3 dP; + firstPiolaDifferential(psb->m_tetraScratches[j], dF, dP); + // btVector3 df_on_node0 = dP * (tetra.m_Dm_inverse.transpose()*grad_N_hat_1st_col); + btMatrix3x3 df_on_node123 = psb->m_tetraScratches[j].m_corotation * dP * tetra.m_Dm_inverse.transpose(); + btVector3 df_on_node0 = df_on_node123 * grad_N_hat_1st_col; + + // elastic force differential + btScalar scale1 = scale * tetra.m_element_measure; + df[id0] -= scale1 * df_on_node0; + df[id1] -= scale1 * df_on_node123.getColumn(0); + df[id2] -= scale1 * df_on_node123.getColumn(1); + df[id3] -= scale1 * df_on_node123.getColumn(2); + } + } + } + + void firstPiola(const btSoftBody::TetraScratch& s, btMatrix3x3& P) + { + btMatrix3x3 corotated_F = s.m_corotation.transpose() * s.m_F; + + btMatrix3x3 epsilon = (corotated_F + corotated_F.transpose()) * 0.5 - btMatrix3x3::getIdentity(); + btScalar trace = epsilon[0][0] + epsilon[1][1] + epsilon[2][2]; + P = epsilon * btScalar(2) * m_mu + btMatrix3x3::getIdentity() * m_lambda * trace; + } + + // Let P be the first piola stress. + // This function calculates the dP = dP/dF * dF + void firstPiolaDifferential(const btSoftBody::TetraScratch& s, const btMatrix3x3& dF, btMatrix3x3& dP) + { + btScalar trace = (dF[0][0] + dF[1][1] + dF[2][2]); + dP = (dF + dF.transpose()) * m_mu + btMatrix3x3::getIdentity() * m_lambda * trace; + } + + // Let Q be the damping stress. + // This function calculates the dP = dQ/dF * dF + void firstPiolaDampingDifferential(const btSoftBody::TetraScratch& s, const btMatrix3x3& dF, btMatrix3x3& dP) + { + btScalar mu_damp = m_damping_beta * m_mu; + btScalar lambda_damp = m_damping_beta * m_lambda; + btScalar trace = (dF[0][0] + dF[1][1] + dF[2][2]); + dP = (dF + dF.transpose()) * mu_damp + btMatrix3x3::getIdentity() * lambda_damp * trace; + } + + virtual void addScaledHessian(btScalar scale) + { + btVector3 grad_N_hat_1st_col = btVector3(-1, -1, -1); + for (int i = 0; i < m_softBodies.size(); ++i) + { + btSoftBody* psb = m_softBodies[i]; + if (!psb->isActive()) + { + continue; + } + for (int j = 0; j < psb->m_tetras.size(); ++j) + { + btSoftBody::Tetra& tetra = psb->m_tetras[j]; + btMatrix3x3 P; + firstPiola(psb->m_tetraScratches[j], P); // make sure scratch is evaluated at x_n + dt * vn + btMatrix3x3 force_on_node123 = psb->m_tetraScratches[j].m_corotation * P * tetra.m_Dm_inverse.transpose(); + btVector3 force_on_node0 = force_on_node123 * grad_N_hat_1st_col; + btSoftBody::Node* node0 = tetra.m_n[0]; + btSoftBody::Node* node1 = tetra.m_n[1]; + btSoftBody::Node* node2 = tetra.m_n[2]; + btSoftBody::Node* node3 = tetra.m_n[3]; + btScalar scale1 = scale * (scale + m_damping_beta) * tetra.m_element_measure; // stiff and stiffness-damping terms; + node0->m_effectiveMass += OuterProduct(force_on_node0, force_on_node0) * scale1; + node1->m_effectiveMass += OuterProduct(force_on_node123.getColumn(0), force_on_node123.getColumn(0)) * scale1; + node2->m_effectiveMass += OuterProduct(force_on_node123.getColumn(1), force_on_node123.getColumn(1)) * scale1; + node3->m_effectiveMass += OuterProduct(force_on_node123.getColumn(2), force_on_node123.getColumn(2)) * scale1; + } + for (int j = 0; j < psb->m_nodes.size(); ++j) + { + btSoftBody::Node& node = psb->m_nodes[j]; + if (node.m_im > 0) + { + btMatrix3x3 I; + I.setIdentity(); + node.m_effectiveMass += I * (scale * (1.0 / node.m_im) * m_damping_alpha); + } + } + } + } + + virtual btDeformableLagrangianForceType getForceType() + { + return BT_LINEAR_ELASTICITY_FORCE; + } }; #endif /* BT_LINEAR_ELASTICITY_H */ diff --git a/thirdparty/bullet/BulletSoftBody/btDeformableMassSpringForce.h b/thirdparty/bullet/BulletSoftBody/btDeformableMassSpringForce.h index b128df92cc..8c97bd1ba8 100644 --- a/thirdparty/bullet/BulletSoftBody/btDeformableMassSpringForce.h +++ b/thirdparty/bullet/BulletSoftBody/btDeformableMassSpringForce.h @@ -20,282 +20,282 @@ class btDeformableMassSpringForce : public btDeformableLagrangianForce { - // If true, the damping force will be in the direction of the spring - // If false, the damping force will be in the direction of the velocity - bool m_momentum_conserving; - btScalar m_elasticStiffness, m_dampingStiffness, m_bendingStiffness; + // If true, the damping force will be in the direction of the spring + // If false, the damping force will be in the direction of the velocity + bool m_momentum_conserving; + btScalar m_elasticStiffness, m_dampingStiffness, m_bendingStiffness; + public: - typedef btAlignedObjectArray<btVector3> TVStack; - btDeformableMassSpringForce() : m_momentum_conserving(false), m_elasticStiffness(1), m_dampingStiffness(0.05) - { - } - btDeformableMassSpringForce(btScalar k, btScalar d, bool conserve_angular = true, double bending_k = -1) : m_momentum_conserving(conserve_angular), m_elasticStiffness(k), m_dampingStiffness(d), m_bendingStiffness(bending_k) - { - if (m_bendingStiffness < btScalar(0)) - { - m_bendingStiffness = m_elasticStiffness; - } - } - - virtual void addScaledForces(btScalar scale, TVStack& force) - { - addScaledDampingForce(scale, force); - addScaledElasticForce(scale, force); - } - - virtual void addScaledExplicitForce(btScalar scale, TVStack& force) - { - addScaledElasticForce(scale, force); - } - - virtual void addScaledDampingForce(btScalar scale, TVStack& force) - { - int numNodes = getNumNodes(); - btAssert(numNodes <= force.size()); - for (int i = 0; i < m_softBodies.size(); ++i) - { - const btSoftBody* psb = m_softBodies[i]; - if (!psb->isActive()) - { - continue; - } - for (int j = 0; j < psb->m_links.size(); ++j) - { - const btSoftBody::Link& link = psb->m_links[j]; - btSoftBody::Node* node1 = link.m_n[0]; - btSoftBody::Node* node2 = link.m_n[1]; - size_t id1 = node1->index; - size_t id2 = node2->index; - - // damping force - btVector3 v_diff = (node2->m_v - node1->m_v); - btVector3 scaled_force = scale * m_dampingStiffness * v_diff; - if (m_momentum_conserving) - { - if ((node2->m_x - node1->m_x).norm() > SIMD_EPSILON) - { - btVector3 dir = (node2->m_x - node1->m_x).normalized(); - scaled_force = scale * m_dampingStiffness * v_diff.dot(dir) * dir; - } - } - force[id1] += scaled_force; - force[id2] -= scaled_force; - } - } - } - - virtual void addScaledElasticForce(btScalar scale, TVStack& force) - { - int numNodes = getNumNodes(); - btAssert(numNodes <= force.size()); - for (int i = 0; i < m_softBodies.size(); ++i) - { - const btSoftBody* psb = m_softBodies[i]; - if (!psb->isActive()) - { - continue; - } - for (int j = 0; j < psb->m_links.size(); ++j) - { - const btSoftBody::Link& link = psb->m_links[j]; - btSoftBody::Node* node1 = link.m_n[0]; - btSoftBody::Node* node2 = link.m_n[1]; - btScalar r = link.m_rl; - size_t id1 = node1->index; - size_t id2 = node2->index; - - // elastic force - btVector3 dir = (node2->m_q - node1->m_q); - btVector3 dir_normalized = (dir.norm() > SIMD_EPSILON) ? dir.normalized() : btVector3(0,0,0); - btScalar scaled_stiffness = scale * (link.m_bbending ? m_bendingStiffness : m_elasticStiffness); - btVector3 scaled_force = scaled_stiffness * (dir - dir_normalized * r); - force[id1] += scaled_force; - force[id2] -= scaled_force; - } - } - } - - virtual void addScaledDampingForceDifferential(btScalar scale, const TVStack& dv, TVStack& df) - { - // implicit damping force differential - for (int i = 0; i < m_softBodies.size(); ++i) - { - btSoftBody* psb = m_softBodies[i]; - if (!psb->isActive()) - { - continue; - } - btScalar scaled_k_damp = m_dampingStiffness * scale; - for (int j = 0; j < psb->m_links.size(); ++j) - { - const btSoftBody::Link& link = psb->m_links[j]; - btSoftBody::Node* node1 = link.m_n[0]; - btSoftBody::Node* node2 = link.m_n[1]; - size_t id1 = node1->index; - size_t id2 = node2->index; + typedef btAlignedObjectArray<btVector3> TVStack; + btDeformableMassSpringForce() : m_momentum_conserving(false), m_elasticStiffness(1), m_dampingStiffness(0.05) + { + } + btDeformableMassSpringForce(btScalar k, btScalar d, bool conserve_angular = true, double bending_k = -1) : m_momentum_conserving(conserve_angular), m_elasticStiffness(k), m_dampingStiffness(d), m_bendingStiffness(bending_k) + { + if (m_bendingStiffness < btScalar(0)) + { + m_bendingStiffness = m_elasticStiffness; + } + } + + virtual void addScaledForces(btScalar scale, TVStack& force) + { + addScaledDampingForce(scale, force); + addScaledElasticForce(scale, force); + } + + virtual void addScaledExplicitForce(btScalar scale, TVStack& force) + { + addScaledElasticForce(scale, force); + } + + virtual void addScaledDampingForce(btScalar scale, TVStack& force) + { + int numNodes = getNumNodes(); + btAssert(numNodes <= force.size()); + for (int i = 0; i < m_softBodies.size(); ++i) + { + const btSoftBody* psb = m_softBodies[i]; + if (!psb->isActive()) + { + continue; + } + for (int j = 0; j < psb->m_links.size(); ++j) + { + const btSoftBody::Link& link = psb->m_links[j]; + btSoftBody::Node* node1 = link.m_n[0]; + btSoftBody::Node* node2 = link.m_n[1]; + size_t id1 = node1->index; + size_t id2 = node2->index; + + // damping force + btVector3 v_diff = (node2->m_v - node1->m_v); + btVector3 scaled_force = scale * m_dampingStiffness * v_diff; + if (m_momentum_conserving) + { + if ((node2->m_x - node1->m_x).norm() > SIMD_EPSILON) + { + btVector3 dir = (node2->m_x - node1->m_x).normalized(); + scaled_force = scale * m_dampingStiffness * v_diff.dot(dir) * dir; + } + } + force[id1] += scaled_force; + force[id2] -= scaled_force; + } + } + } + + virtual void addScaledElasticForce(btScalar scale, TVStack& force) + { + int numNodes = getNumNodes(); + btAssert(numNodes <= force.size()); + for (int i = 0; i < m_softBodies.size(); ++i) + { + const btSoftBody* psb = m_softBodies[i]; + if (!psb->isActive()) + { + continue; + } + for (int j = 0; j < psb->m_links.size(); ++j) + { + const btSoftBody::Link& link = psb->m_links[j]; + btSoftBody::Node* node1 = link.m_n[0]; + btSoftBody::Node* node2 = link.m_n[1]; + btScalar r = link.m_rl; + size_t id1 = node1->index; + size_t id2 = node2->index; + + // elastic force + btVector3 dir = (node2->m_q - node1->m_q); + btVector3 dir_normalized = (dir.norm() > SIMD_EPSILON) ? dir.normalized() : btVector3(0, 0, 0); + btScalar scaled_stiffness = scale * (link.m_bbending ? m_bendingStiffness : m_elasticStiffness); + btVector3 scaled_force = scaled_stiffness * (dir - dir_normalized * r); + force[id1] += scaled_force; + force[id2] -= scaled_force; + } + } + } + + virtual void addScaledDampingForceDifferential(btScalar scale, const TVStack& dv, TVStack& df) + { + // implicit damping force differential + for (int i = 0; i < m_softBodies.size(); ++i) + { + btSoftBody* psb = m_softBodies[i]; + if (!psb->isActive()) + { + continue; + } + btScalar scaled_k_damp = m_dampingStiffness * scale; + for (int j = 0; j < psb->m_links.size(); ++j) + { + const btSoftBody::Link& link = psb->m_links[j]; + btSoftBody::Node* node1 = link.m_n[0]; + btSoftBody::Node* node2 = link.m_n[1]; + size_t id1 = node1->index; + size_t id2 = node2->index; + + btVector3 local_scaled_df = scaled_k_damp * (dv[id2] - dv[id1]); + if (m_momentum_conserving) + { + if ((node2->m_x - node1->m_x).norm() > SIMD_EPSILON) + { + btVector3 dir = (node2->m_x - node1->m_x).normalized(); + local_scaled_df = scaled_k_damp * (dv[id2] - dv[id1]).dot(dir) * dir; + } + } + df[id1] += local_scaled_df; + df[id2] -= local_scaled_df; + } + } + } + + virtual void buildDampingForceDifferentialDiagonal(btScalar scale, TVStack& diagA) + { + // implicit damping force differential + for (int i = 0; i < m_softBodies.size(); ++i) + { + btSoftBody* psb = m_softBodies[i]; + if (!psb->isActive()) + { + continue; + } + btScalar scaled_k_damp = m_dampingStiffness * scale; + for (int j = 0; j < psb->m_links.size(); ++j) + { + const btSoftBody::Link& link = psb->m_links[j]; + btSoftBody::Node* node1 = link.m_n[0]; + btSoftBody::Node* node2 = link.m_n[1]; + size_t id1 = node1->index; + size_t id2 = node2->index; + if (m_momentum_conserving) + { + if ((node2->m_x - node1->m_x).norm() > SIMD_EPSILON) + { + btVector3 dir = (node2->m_x - node1->m_x).normalized(); + for (int d = 0; d < 3; ++d) + { + if (node1->m_im > 0) + diagA[id1][d] -= scaled_k_damp * dir[d] * dir[d]; + if (node2->m_im > 0) + diagA[id2][d] -= scaled_k_damp * dir[d] * dir[d]; + } + } + } + else + { + for (int d = 0; d < 3; ++d) + { + if (node1->m_im > 0) + diagA[id1][d] -= scaled_k_damp; + if (node2->m_im > 0) + diagA[id2][d] -= scaled_k_damp; + } + } + } + } + } + + virtual double totalElasticEnergy(btScalar dt) + { + double energy = 0; + for (int i = 0; i < m_softBodies.size(); ++i) + { + const btSoftBody* psb = m_softBodies[i]; + if (!psb->isActive()) + { + continue; + } + for (int j = 0; j < psb->m_links.size(); ++j) + { + const btSoftBody::Link& link = psb->m_links[j]; + btSoftBody::Node* node1 = link.m_n[0]; + btSoftBody::Node* node2 = link.m_n[1]; + btScalar r = link.m_rl; + + // elastic force + btVector3 dir = (node2->m_q - node1->m_q); + energy += 0.5 * m_elasticStiffness * (dir.norm() - r) * (dir.norm() - r); + } + } + return energy; + } + + virtual double totalDampingEnergy(btScalar dt) + { + double energy = 0; + int sz = 0; + for (int i = 0; i < m_softBodies.size(); ++i) + { + btSoftBody* psb = m_softBodies[i]; + if (!psb->isActive()) + { + continue; + } + for (int j = 0; j < psb->m_nodes.size(); ++j) + { + sz = btMax(sz, psb->m_nodes[j].index); + } + } + TVStack dampingForce; + dampingForce.resize(sz + 1); + for (int i = 0; i < dampingForce.size(); ++i) + dampingForce[i].setZero(); + addScaledDampingForce(0.5, dampingForce); + for (int i = 0; i < m_softBodies.size(); ++i) + { + btSoftBody* psb = m_softBodies[i]; + for (int j = 0; j < psb->m_nodes.size(); ++j) + { + const btSoftBody::Node& node = psb->m_nodes[j]; + energy -= dampingForce[node.index].dot(node.m_v) / dt; + } + } + return energy; + } + + virtual void addScaledElasticForceDifferential(btScalar scale, const TVStack& dx, TVStack& df) + { + // implicit damping force differential + for (int i = 0; i < m_softBodies.size(); ++i) + { + const btSoftBody* psb = m_softBodies[i]; + if (!psb->isActive()) + { + continue; + } + for (int j = 0; j < psb->m_links.size(); ++j) + { + const btSoftBody::Link& link = psb->m_links[j]; + btSoftBody::Node* node1 = link.m_n[0]; + btSoftBody::Node* node2 = link.m_n[1]; + size_t id1 = node1->index; + size_t id2 = node2->index; + btScalar r = link.m_rl; - btVector3 local_scaled_df = scaled_k_damp * (dv[id2] - dv[id1]); - if (m_momentum_conserving) - { - if ((node2->m_x - node1->m_x).norm() > SIMD_EPSILON) - { - btVector3 dir = (node2->m_x - node1->m_x).normalized(); - local_scaled_df= scaled_k_damp * (dv[id2] - dv[id1]).dot(dir) * dir; - } - } - df[id1] += local_scaled_df; - df[id2] -= local_scaled_df; - } - } - } - - virtual void buildDampingForceDifferentialDiagonal(btScalar scale, TVStack& diagA) - { - // implicit damping force differential - for (int i = 0; i < m_softBodies.size(); ++i) - { - btSoftBody* psb = m_softBodies[i]; - if (!psb->isActive()) - { - continue; - } - btScalar scaled_k_damp = m_dampingStiffness * scale; - for (int j = 0; j < psb->m_links.size(); ++j) - { - const btSoftBody::Link& link = psb->m_links[j]; - btSoftBody::Node* node1 = link.m_n[0]; - btSoftBody::Node* node2 = link.m_n[1]; - size_t id1 = node1->index; - size_t id2 = node2->index; - if (m_momentum_conserving) - { - if ((node2->m_x - node1->m_x).norm() > SIMD_EPSILON) - { - btVector3 dir = (node2->m_x - node1->m_x).normalized(); - for (int d = 0; d < 3; ++d) - { - if (node1->m_im > 0) - diagA[id1][d] -= scaled_k_damp * dir[d] * dir[d]; - if (node2->m_im > 0) - diagA[id2][d] -= scaled_k_damp * dir[d] * dir[d]; - } - } - } - else - { - for (int d = 0; d < 3; ++d) - { - if (node1->m_im > 0) - diagA[id1][d] -= scaled_k_damp; - if (node2->m_im > 0) - diagA[id2][d] -= scaled_k_damp; - } - } - } - } - } - - virtual double totalElasticEnergy(btScalar dt) - { - double energy = 0; - for (int i = 0; i < m_softBodies.size(); ++i) - { - const btSoftBody* psb = m_softBodies[i]; - if (!psb->isActive()) - { - continue; - } - for (int j = 0; j < psb->m_links.size(); ++j) - { - const btSoftBody::Link& link = psb->m_links[j]; - btSoftBody::Node* node1 = link.m_n[0]; - btSoftBody::Node* node2 = link.m_n[1]; - btScalar r = link.m_rl; + btVector3 dir = (node1->m_q - node2->m_q); + btScalar dir_norm = dir.norm(); + btVector3 dir_normalized = (dir_norm > SIMD_EPSILON) ? dir.normalized() : btVector3(0, 0, 0); + btVector3 dx_diff = dx[id1] - dx[id2]; + btVector3 scaled_df = btVector3(0, 0, 0); + btScalar scaled_k = scale * (link.m_bbending ? m_bendingStiffness : m_elasticStiffness); + if (dir_norm > SIMD_EPSILON) + { + scaled_df -= scaled_k * dir_normalized.dot(dx_diff) * dir_normalized; + scaled_df += scaled_k * dir_normalized.dot(dx_diff) * ((dir_norm - r) / dir_norm) * dir_normalized; + scaled_df -= scaled_k * ((dir_norm - r) / dir_norm) * dx_diff; + } - // elastic force - btVector3 dir = (node2->m_q - node1->m_q); - energy += 0.5 * m_elasticStiffness * (dir.norm() - r) * (dir.norm() -r); - } - } - return energy; - } - - virtual double totalDampingEnergy(btScalar dt) - { - double energy = 0; - int sz = 0; - for (int i = 0; i < m_softBodies.size(); ++i) - { - btSoftBody* psb = m_softBodies[i]; - if (!psb->isActive()) - { - continue; - } - for (int j = 0; j < psb->m_nodes.size(); ++j) - { - sz = btMax(sz, psb->m_nodes[j].index); - } - } - TVStack dampingForce; - dampingForce.resize(sz+1); - for (int i = 0; i < dampingForce.size(); ++i) - dampingForce[i].setZero(); - addScaledDampingForce(0.5, dampingForce); - for (int i = 0; i < m_softBodies.size(); ++i) - { - btSoftBody* psb = m_softBodies[i]; - for (int j = 0; j < psb->m_nodes.size(); ++j) - { - const btSoftBody::Node& node = psb->m_nodes[j]; - energy -= dampingForce[node.index].dot(node.m_v) / dt; - } - } - return energy; - } - - virtual void addScaledElasticForceDifferential(btScalar scale, const TVStack& dx, TVStack& df) - { - // implicit damping force differential - for (int i = 0; i < m_softBodies.size(); ++i) - { - const btSoftBody* psb = m_softBodies[i]; - if (!psb->isActive()) - { - continue; - } - for (int j = 0; j < psb->m_links.size(); ++j) - { - const btSoftBody::Link& link = psb->m_links[j]; - btSoftBody::Node* node1 = link.m_n[0]; - btSoftBody::Node* node2 = link.m_n[1]; - size_t id1 = node1->index; - size_t id2 = node2->index; - btScalar r = link.m_rl; + df[id1] += scaled_df; + df[id2] -= scaled_df; + } + } + } - btVector3 dir = (node1->m_q - node2->m_q); - btScalar dir_norm = dir.norm(); - btVector3 dir_normalized = (dir_norm > SIMD_EPSILON) ? dir.normalized() : btVector3(0,0,0); - btVector3 dx_diff = dx[id1] - dx[id2]; - btVector3 scaled_df = btVector3(0,0,0); - btScalar scaled_k = scale * (link.m_bbending ? m_bendingStiffness : m_elasticStiffness); - if (dir_norm > SIMD_EPSILON) - { - scaled_df -= scaled_k * dir_normalized.dot(dx_diff) * dir_normalized; - scaled_df += scaled_k * dir_normalized.dot(dx_diff) * ((dir_norm-r)/dir_norm) * dir_normalized; - scaled_df -= scaled_k * ((dir_norm-r)/dir_norm) * dx_diff; - } - - df[id1] += scaled_df; - df[id2] -= scaled_df; - } - } - } - - virtual btDeformableLagrangianForceType getForceType() - { - return BT_MASSSPRING_FORCE; - } - + virtual btDeformableLagrangianForceType getForceType() + { + return BT_MASSSPRING_FORCE; + } }; #endif /* btMassSpring_h */ diff --git a/thirdparty/bullet/BulletSoftBody/btDeformableMousePickingForce.h b/thirdparty/bullet/BulletSoftBody/btDeformableMousePickingForce.h index 07c10935f4..d218d96214 100644 --- a/thirdparty/bullet/BulletSoftBody/btDeformableMousePickingForce.h +++ b/thirdparty/bullet/BulletSoftBody/btDeformableMousePickingForce.h @@ -20,126 +20,143 @@ class btDeformableMousePickingForce : public btDeformableLagrangianForce { - // If true, the damping force will be in the direction of the spring - // If false, the damping force will be in the direction of the velocity - btScalar m_elasticStiffness, m_dampingStiffness; - const btSoftBody::Face& m_face; - btVector3 m_mouse_pos; - btScalar m_maxForce; + // If true, the damping force will be in the direction of the spring + // If false, the damping force will be in the direction of the velocity + btScalar m_elasticStiffness, m_dampingStiffness; + const btSoftBody::Face& m_face; + btVector3 m_mouse_pos; + btScalar m_maxForce; + public: - typedef btAlignedObjectArray<btVector3> TVStack; - btDeformableMousePickingForce(btScalar k, btScalar d, const btSoftBody::Face& face, btVector3 mouse_pos, btScalar maxForce = 0.3) : m_elasticStiffness(k), m_dampingStiffness(d), m_face(face), m_mouse_pos(mouse_pos), m_maxForce(maxForce) - { - } - - virtual void addScaledForces(btScalar scale, TVStack& force) - { - addScaledDampingForce(scale, force); - addScaledElasticForce(scale, force); - } - - virtual void addScaledExplicitForce(btScalar scale, TVStack& force) - { - addScaledElasticForce(scale, force); - } - - virtual void addScaledDampingForce(btScalar scale, TVStack& force) - { - for (int i = 0; i < 3; ++i) - { - btVector3 v_diff = m_face.m_n[i]->m_v; - btVector3 scaled_force = scale * m_dampingStiffness * v_diff; - if ((m_face.m_n[i]->m_x - m_mouse_pos).norm() > SIMD_EPSILON) - { - btVector3 dir = (m_face.m_n[i]->m_x - m_mouse_pos).normalized(); - scaled_force = scale * m_dampingStiffness * v_diff.dot(dir) * dir; - } - force[m_face.m_n[i]->index] -= scaled_force; - } - } - - virtual void addScaledElasticForce(btScalar scale, TVStack& force) - { - btScalar scaled_stiffness = scale * m_elasticStiffness; - for (int i = 0; i < 3; ++i) - { - btVector3 dir = (m_face.m_n[i]->m_q - m_mouse_pos); - btVector3 scaled_force = scaled_stiffness * dir; - if (scaled_force.safeNorm() > m_maxForce) - { - scaled_force.safeNormalize(); - scaled_force *= m_maxForce; - } - force[m_face.m_n[i]->index] -= scaled_force; - } - } - - virtual void addScaledDampingForceDifferential(btScalar scale, const TVStack& dv, TVStack& df) - { - btScalar scaled_k_damp = m_dampingStiffness * scale; - for (int i = 0; i < 3; ++i) - { - btVector3 local_scaled_df = scaled_k_damp * dv[m_face.m_n[i]->index]; - if ((m_face.m_n[i]->m_x - m_mouse_pos).norm() > SIMD_EPSILON) - { - btVector3 dir = (m_face.m_n[i]->m_x - m_mouse_pos).normalized(); - local_scaled_df= scaled_k_damp * dv[m_face.m_n[i]->index].dot(dir) * dir; - } - df[m_face.m_n[i]->index] -= local_scaled_df; - } - } - - virtual void buildDampingForceDifferentialDiagonal(btScalar scale, TVStack& diagA){} - - virtual double totalElasticEnergy(btScalar dt) - { - double energy = 0; - for (int i = 0; i < 3; ++i) - { - btVector3 dir = (m_face.m_n[i]->m_q - m_mouse_pos); - btVector3 scaled_force = m_elasticStiffness * dir; - if (scaled_force.safeNorm() > m_maxForce) - { - scaled_force.safeNormalize(); - scaled_force *= m_maxForce; - } - energy += 0.5 * scaled_force.dot(dir); - } - return energy; - } - - virtual double totalDampingEnergy(btScalar dt) - { - double energy = 0; - for (int i = 0; i < 3; ++i) - { - btVector3 v_diff = m_face.m_n[i]->m_v; - btVector3 scaled_force = m_dampingStiffness * v_diff; - if ((m_face.m_n[i]->m_x - m_mouse_pos).norm() > SIMD_EPSILON) - { - btVector3 dir = (m_face.m_n[i]->m_x - m_mouse_pos).normalized(); - scaled_force = m_dampingStiffness * v_diff.dot(dir) * dir; - } - energy -= scaled_force.dot(m_face.m_n[i]->m_v) / dt; - } - return energy; - } - - virtual void addScaledElasticForceDifferential(btScalar scale, const TVStack& dx, TVStack& df) - { - //TODO - } - - void setMousePos(const btVector3& p) - { - m_mouse_pos = p; - } - - virtual btDeformableLagrangianForceType getForceType() - { - return BT_MOUSE_PICKING_FORCE; - } - + typedef btAlignedObjectArray<btVector3> TVStack; + btDeformableMousePickingForce(btScalar k, btScalar d, const btSoftBody::Face& face, btVector3 mouse_pos, btScalar maxForce = 0.3) : m_elasticStiffness(k), m_dampingStiffness(d), m_face(face), m_mouse_pos(mouse_pos), m_maxForce(maxForce) + { + } + + virtual void addScaledForces(btScalar scale, TVStack& force) + { + addScaledDampingForce(scale, force); + addScaledElasticForce(scale, force); + } + + virtual void addScaledExplicitForce(btScalar scale, TVStack& force) + { + addScaledElasticForce(scale, force); + } + + virtual void addScaledDampingForce(btScalar scale, TVStack& force) + { + for (int i = 0; i < 3; ++i) + { + btVector3 v_diff = m_face.m_n[i]->m_v; + btVector3 scaled_force = scale * m_dampingStiffness * v_diff; + if ((m_face.m_n[i]->m_x - m_mouse_pos).norm() > SIMD_EPSILON) + { + btVector3 dir = (m_face.m_n[i]->m_x - m_mouse_pos).normalized(); + scaled_force = scale * m_dampingStiffness * v_diff.dot(dir) * dir; + } + force[m_face.m_n[i]->index] -= scaled_force; + } + } + + virtual void addScaledElasticForce(btScalar scale, TVStack& force) + { + btScalar scaled_stiffness = scale * m_elasticStiffness; + for (int i = 0; i < 3; ++i) + { + btVector3 dir = (m_face.m_n[i]->m_q - m_mouse_pos); + btVector3 scaled_force = scaled_stiffness * dir; + if (scaled_force.safeNorm() > m_maxForce) + { + scaled_force.safeNormalize(); + scaled_force *= m_maxForce; + } + force[m_face.m_n[i]->index] -= scaled_force; + } + } + + virtual void addScaledDampingForceDifferential(btScalar scale, const TVStack& dv, TVStack& df) + { + btScalar scaled_k_damp = m_dampingStiffness * scale; + for (int i = 0; i < 3; ++i) + { + btVector3 local_scaled_df = scaled_k_damp * dv[m_face.m_n[i]->index]; + if ((m_face.m_n[i]->m_x - m_mouse_pos).norm() > SIMD_EPSILON) + { + btVector3 dir = (m_face.m_n[i]->m_x - m_mouse_pos).normalized(); + local_scaled_df = scaled_k_damp * dv[m_face.m_n[i]->index].dot(dir) * dir; + } + df[m_face.m_n[i]->index] -= local_scaled_df; + } + } + + virtual void buildDampingForceDifferentialDiagonal(btScalar scale, TVStack& diagA) {} + + virtual double totalElasticEnergy(btScalar dt) + { + double energy = 0; + for (int i = 0; i < 3; ++i) + { + btVector3 dir = (m_face.m_n[i]->m_q - m_mouse_pos); + btVector3 scaled_force = m_elasticStiffness * dir; + if (scaled_force.safeNorm() > m_maxForce) + { + scaled_force.safeNormalize(); + scaled_force *= m_maxForce; + } + energy += 0.5 * scaled_force.dot(dir); + } + return energy; + } + + virtual double totalDampingEnergy(btScalar dt) + { + double energy = 0; + for (int i = 0; i < 3; ++i) + { + btVector3 v_diff = m_face.m_n[i]->m_v; + btVector3 scaled_force = m_dampingStiffness * v_diff; + if ((m_face.m_n[i]->m_x - m_mouse_pos).norm() > SIMD_EPSILON) + { + btVector3 dir = (m_face.m_n[i]->m_x - m_mouse_pos).normalized(); + scaled_force = m_dampingStiffness * v_diff.dot(dir) * dir; + } + energy -= scaled_force.dot(m_face.m_n[i]->m_v) / dt; + } + return energy; + } + + virtual void addScaledElasticForceDifferential(btScalar scale, const TVStack& dx, TVStack& df) + { + btScalar scaled_stiffness = scale * m_elasticStiffness; + for (int i = 0; i < 3; ++i) + { + btVector3 dir = (m_face.m_n[i]->m_q - m_mouse_pos); + btScalar dir_norm = dir.norm(); + btVector3 dir_normalized = (dir_norm > SIMD_EPSILON) ? dir.normalized() : btVector3(0, 0, 0); + int id = m_face.m_n[i]->index; + btVector3 dx_diff = dx[id]; + btScalar r = 0; // rest length is 0 for picking spring + btVector3 scaled_df = btVector3(0, 0, 0); + if (dir_norm > SIMD_EPSILON) + { + scaled_df -= scaled_stiffness * dir_normalized.dot(dx_diff) * dir_normalized; + scaled_df += scaled_stiffness * dir_normalized.dot(dx_diff) * ((dir_norm - r) / dir_norm) * dir_normalized; + scaled_df -= scaled_stiffness * ((dir_norm - r) / dir_norm) * dx_diff; + } + df[id] += scaled_df; + } + } + + void setMousePos(const btVector3& p) + { + m_mouse_pos = p; + } + + virtual btDeformableLagrangianForceType getForceType() + { + return BT_MOUSE_PICKING_FORCE; + } }; #endif /* btMassSpring_h */ diff --git a/thirdparty/bullet/BulletSoftBody/btDeformableMultiBodyConstraintSolver.cpp b/thirdparty/bullet/BulletSoftBody/btDeformableMultiBodyConstraintSolver.cpp index c8cc47923e..631fd5fbed 100644 --- a/thirdparty/bullet/BulletSoftBody/btDeformableMultiBodyConstraintSolver.cpp +++ b/thirdparty/bullet/BulletSoftBody/btDeformableMultiBodyConstraintSolver.cpp @@ -13,131 +13,132 @@ 3. This notice may not be removed or altered from any source distribution. */ - #include "btDeformableMultiBodyConstraintSolver.h" #include <iostream> // override the iterations method to include deformable/multibody contact -btScalar btDeformableMultiBodyConstraintSolver::solveDeformableGroupIterations(btCollisionObject** bodies,int numBodies,btCollisionObject** deformableBodies,int numDeformableBodies,btPersistentManifold** manifoldPtr, int numManifolds,btTypedConstraint** constraints,int numConstraints,const btContactSolverInfo& infoGlobal,btIDebugDraw* debugDrawer) +btScalar btDeformableMultiBodyConstraintSolver::solveDeformableGroupIterations(btCollisionObject** bodies, int numBodies, btCollisionObject** deformableBodies, int numDeformableBodies, btPersistentManifold** manifoldPtr, int numManifolds, btTypedConstraint** constraints, int numConstraints, const btContactSolverInfo& infoGlobal, btIDebugDraw* debugDrawer) { - { - ///this is a special step to resolve penetrations (just for contacts) - solveGroupCacheFriendlySplitImpulseIterations(bodies, numBodies, manifoldPtr, numManifolds, constraints, numConstraints, infoGlobal, debugDrawer); + { + ///this is a special step to resolve penetrations (just for contacts) + solveGroupCacheFriendlySplitImpulseIterations(bodies, numBodies, deformableBodies, numDeformableBodies, manifoldPtr, numManifolds, constraints, numConstraints, infoGlobal, debugDrawer); + + int maxIterations = m_maxOverrideNumSolverIterations > infoGlobal.m_numIterations ? m_maxOverrideNumSolverIterations : infoGlobal.m_numIterations; + for (int iteration = 0; iteration < maxIterations; iteration++) + { + // rigid bodies are solved using solver body velocity, but rigid/deformable contact directly uses the velocity of the actual rigid body. So we have to do the following: Solve one iteration of the rigid/rigid contact, get the updated velocity in the solver body and update the velocity of the underlying rigid body. Then solve the rigid/deformable contact. Finally, grab the (once again) updated rigid velocity and update the velocity of the wrapping solver body - int maxIterations = m_maxOverrideNumSolverIterations > infoGlobal.m_numIterations ? m_maxOverrideNumSolverIterations : infoGlobal.m_numIterations; - for (int iteration = 0; iteration < maxIterations; iteration++) - { - // rigid bodies are solved using solver body velocity, but rigid/deformable contact directly uses the velocity of the actual rigid body. So we have to do the following: Solve one iteration of the rigid/rigid contact, get the updated velocity in the solver body and update the velocity of the underlying rigid body. Then solve the rigid/deformable contact. Finally, grab the (once again) updated rigid velocity and update the velocity of the wrapping solver body - - // solve rigid/rigid in solver body - m_leastSquaresResidual = solveSingleIteration(iteration, bodies, numBodies, manifoldPtr, numManifolds, constraints, numConstraints, infoGlobal, debugDrawer); - // solver body velocity -> rigid body velocity - solverBodyWriteBack(infoGlobal); - btScalar deformableResidual = m_deformableSolver->solveContactConstraints(deformableBodies,numDeformableBodies, infoGlobal); - // update rigid body velocity in rigid/deformable contact - m_leastSquaresResidual = btMax(m_leastSquaresResidual, deformableResidual); - // solver body velocity <- rigid body velocity - writeToSolverBody(bodies, numBodies, infoGlobal); - - if (m_leastSquaresResidual <= infoGlobal.m_leastSquaresResidualThreshold || (iteration >= (maxIterations - 1))) - { + // solve rigid/rigid in solver body + m_leastSquaresResidual = solveSingleIteration(iteration, bodies, numBodies, manifoldPtr, numManifolds, constraints, numConstraints, infoGlobal, debugDrawer); + // solver body velocity -> rigid body velocity + solverBodyWriteBack(infoGlobal); + btScalar deformableResidual = m_deformableSolver->solveContactConstraints(deformableBodies, numDeformableBodies, infoGlobal); + // update rigid body velocity in rigid/deformable contact + m_leastSquaresResidual = btMax(m_leastSquaresResidual, deformableResidual); + // solver body velocity <- rigid body velocity + writeToSolverBody(bodies, numBodies, infoGlobal); + + if (m_leastSquaresResidual <= infoGlobal.m_leastSquaresResidualThreshold || (iteration >= (maxIterations - 1))) + { #ifdef VERBOSE_RESIDUAL_PRINTF - printf("residual = %f at iteration #%d\n", m_leastSquaresResidual, iteration); + if (iteration >= (maxIterations - 1)) + printf("residual = %f at iteration #%d\n", m_leastSquaresResidual, iteration); #endif - m_analyticsData.m_numSolverCalls++; - m_analyticsData.m_numIterationsUsed = iteration+1; - m_analyticsData.m_islandId = -2; - if (numBodies>0) - m_analyticsData.m_islandId = bodies[0]->getCompanionId(); - m_analyticsData.m_numBodies = numBodies; - m_analyticsData.m_numContactManifolds = numManifolds; - m_analyticsData.m_remainingLeastSquaresResidual = m_leastSquaresResidual; - break; - } - } - } - return 0.f; + m_analyticsData.m_numSolverCalls++; + m_analyticsData.m_numIterationsUsed = iteration + 1; + m_analyticsData.m_islandId = -2; + if (numBodies > 0) + m_analyticsData.m_islandId = bodies[0]->getCompanionId(); + m_analyticsData.m_numBodies = numBodies; + m_analyticsData.m_numContactManifolds = numManifolds; + m_analyticsData.m_remainingLeastSquaresResidual = m_leastSquaresResidual; + break; + } + } + } + return 0.f; } -void btDeformableMultiBodyConstraintSolver::solveDeformableBodyGroup(btCollisionObject * *bodies, int numBodies, btCollisionObject * *deformableBodies, int numDeformableBodies, btPersistentManifold** manifold, int numManifolds, btTypedConstraint** constraints, int numConstraints, btMultiBodyConstraint** multiBodyConstraints, int numMultiBodyConstraints, const btContactSolverInfo& info, btIDebugDraw* debugDrawer, btDispatcher* dispatcher) +void btDeformableMultiBodyConstraintSolver::solveDeformableBodyGroup(btCollisionObject** bodies, int numBodies, btCollisionObject** deformableBodies, int numDeformableBodies, btPersistentManifold** manifold, int numManifolds, btTypedConstraint** constraints, int numConstraints, btMultiBodyConstraint** multiBodyConstraints, int numMultiBodyConstraints, const btContactSolverInfo& info, btIDebugDraw* debugDrawer, btDispatcher* dispatcher) { - m_tmpMultiBodyConstraints = multiBodyConstraints; - m_tmpNumMultiBodyConstraints = numMultiBodyConstraints; - - // inherited from MultiBodyConstraintSolver - solveGroupCacheFriendlySetup(bodies, numBodies, manifold, numManifolds, constraints, numConstraints, info, debugDrawer); - - // overriden - solveDeformableGroupIterations(bodies, numBodies, deformableBodies, numDeformableBodies, manifold, numManifolds, constraints, numConstraints, info, debugDrawer); - - // inherited from MultiBodyConstraintSolver - solveGroupCacheFriendlyFinish(bodies, numBodies, info); - - m_tmpMultiBodyConstraints = 0; - m_tmpNumMultiBodyConstraints = 0; + m_tmpMultiBodyConstraints = multiBodyConstraints; + m_tmpNumMultiBodyConstraints = numMultiBodyConstraints; + + // inherited from MultiBodyConstraintSolver + solveGroupCacheFriendlySetup(bodies, numBodies, manifold, numManifolds, constraints, numConstraints, info, debugDrawer); + + // overriden + solveDeformableGroupIterations(bodies, numBodies, deformableBodies, numDeformableBodies, manifold, numManifolds, constraints, numConstraints, info, debugDrawer); + + // inherited from MultiBodyConstraintSolver + solveGroupCacheFriendlyFinish(bodies, numBodies, info); + + m_tmpMultiBodyConstraints = 0; + m_tmpNumMultiBodyConstraints = 0; } void btDeformableMultiBodyConstraintSolver::writeToSolverBody(btCollisionObject** bodies, int numBodies, const btContactSolverInfo& infoGlobal) { - for (int i = 0; i < numBodies; i++) - { - int bodyId = getOrInitSolverBody(*bodies[i], infoGlobal.m_timeStep); + for (int i = 0; i < numBodies; i++) + { + int bodyId = getOrInitSolverBody(*bodies[i], infoGlobal.m_timeStep); - btRigidBody* body = btRigidBody::upcast(bodies[i]); - if (body && body->getInvMass()) - { - btSolverBody& solverBody = m_tmpSolverBodyPool[bodyId]; - solverBody.m_linearVelocity = body->getLinearVelocity() - solverBody.m_deltaLinearVelocity; - solverBody.m_angularVelocity = body->getAngularVelocity() - solverBody.m_deltaAngularVelocity; - } - } + btRigidBody* body = btRigidBody::upcast(bodies[i]); + if (body && body->getInvMass()) + { + btSolverBody& solverBody = m_tmpSolverBodyPool[bodyId]; + solverBody.m_linearVelocity = body->getLinearVelocity() - solverBody.m_deltaLinearVelocity; + solverBody.m_angularVelocity = body->getAngularVelocity() - solverBody.m_deltaAngularVelocity; + } + } } void btDeformableMultiBodyConstraintSolver::solverBodyWriteBack(const btContactSolverInfo& infoGlobal) { - for (int i = 0; i < m_tmpSolverBodyPool.size(); i++) - { - btRigidBody* body = m_tmpSolverBodyPool[i].m_originalBody; - if (body) - { - m_tmpSolverBodyPool[i].m_originalBody->setLinearVelocity(m_tmpSolverBodyPool[i].m_linearVelocity + m_tmpSolverBodyPool[i].m_deltaLinearVelocity); - m_tmpSolverBodyPool[i].m_originalBody->setAngularVelocity(m_tmpSolverBodyPool[i].m_angularVelocity+m_tmpSolverBodyPool[i].m_deltaAngularVelocity); - } - } + for (int i = 0; i < m_tmpSolverBodyPool.size(); i++) + { + btRigidBody* body = m_tmpSolverBodyPool[i].m_originalBody; + if (body) + { + m_tmpSolverBodyPool[i].m_originalBody->setLinearVelocity(m_tmpSolverBodyPool[i].m_linearVelocity + m_tmpSolverBodyPool[i].m_deltaLinearVelocity); + m_tmpSolverBodyPool[i].m_originalBody->setAngularVelocity(m_tmpSolverBodyPool[i].m_angularVelocity + m_tmpSolverBodyPool[i].m_deltaAngularVelocity); + } + } } -void btDeformableMultiBodyConstraintSolver::solveGroupCacheFriendlySplitImpulseIterations(btCollisionObject** bodies, int numBodies, btPersistentManifold** manifoldPtr, int numManifolds, btTypedConstraint** constraints, int numConstraints, const btContactSolverInfo& infoGlobal, btIDebugDraw* debugDrawer) +void btDeformableMultiBodyConstraintSolver::solveGroupCacheFriendlySplitImpulseIterations(btCollisionObject** bodies, int numBodies, btCollisionObject** deformableBodies, int numDeformableBodies, btPersistentManifold** manifoldPtr, int numManifolds, btTypedConstraint** constraints, int numConstraints, const btContactSolverInfo& infoGlobal, btIDebugDraw* debugDrawer) { - BT_PROFILE("solveGroupCacheFriendlySplitImpulseIterations"); - int iteration; - if (infoGlobal.m_splitImpulse) - { - { -// m_deformableSolver->splitImpulseSetup(infoGlobal); - for (iteration = 0; iteration < infoGlobal.m_numIterations; iteration++) - { - btScalar leastSquaresResidual = 0.f; - { - int numPoolConstraints = m_tmpSolverContactConstraintPool.size(); - int j; - for (j = 0; j < numPoolConstraints; j++) - { - const btSolverConstraint& solveManifold = m_tmpSolverContactConstraintPool[m_orderTmpConstraintPool[j]]; - - btScalar residual = resolveSplitPenetrationImpulse(m_tmpSolverBodyPool[solveManifold.m_solverBodyIdA], m_tmpSolverBodyPool[solveManifold.m_solverBodyIdB], solveManifold); - leastSquaresResidual = btMax(leastSquaresResidual, residual * residual); - } - // solve the position correction between deformable and rigid/multibody -// btScalar residual = m_deformableSolver->solveSplitImpulse(infoGlobal); -// leastSquaresResidual = btMax(leastSquaresResidual, residual * residual); - } - if (leastSquaresResidual <= infoGlobal.m_leastSquaresResidualThreshold || iteration >= (infoGlobal.m_numIterations - 1)) - { + BT_PROFILE("solveGroupCacheFriendlySplitImpulseIterations"); + int iteration; + if (infoGlobal.m_splitImpulse) + { + { + for (iteration = 0; iteration < infoGlobal.m_numIterations; iteration++) + { + btScalar leastSquaresResidual = 0.f; + { + int numPoolConstraints = m_tmpSolverContactConstraintPool.size(); + int j; + for (j = 0; j < numPoolConstraints; j++) + { + const btSolverConstraint& solveManifold = m_tmpSolverContactConstraintPool[m_orderTmpConstraintPool[j]]; + + btScalar residual = resolveSplitPenetrationImpulse(m_tmpSolverBodyPool[solveManifold.m_solverBodyIdA], m_tmpSolverBodyPool[solveManifold.m_solverBodyIdB], solveManifold); + leastSquaresResidual = btMax(leastSquaresResidual, residual * residual); + } + // solve the position correction between deformable and rigid/multibody + // btScalar residual = m_deformableSolver->solveSplitImpulse(infoGlobal); + btScalar residual = m_deformableSolver->m_objective->m_projection.solveSplitImpulse(deformableBodies, numDeformableBodies, infoGlobal); + leastSquaresResidual = btMax(leastSquaresResidual, residual * residual); + } + if (leastSquaresResidual <= infoGlobal.m_leastSquaresResidualThreshold || iteration >= (infoGlobal.m_numIterations - 1)) + { #ifdef VERBOSE_RESIDUAL_PRINTF - printf("residual = %f at iteration #%d\n", leastSquaresResidual, iteration); + if (iteration >= (infoGlobal.m_numIterations - 1)) + printf("split impulse residual = %f at iteration #%d\n", leastSquaresResidual, iteration); #endif - break; - } - } - } - } + break; + } + } + } + } } diff --git a/thirdparty/bullet/BulletSoftBody/btDeformableMultiBodyConstraintSolver.h b/thirdparty/bullet/BulletSoftBody/btDeformableMultiBodyConstraintSolver.h index 0c7cc26a83..94aabce838 100644 --- a/thirdparty/bullet/BulletSoftBody/btDeformableMultiBodyConstraintSolver.h +++ b/thirdparty/bullet/BulletSoftBody/btDeformableMultiBodyConstraintSolver.h @@ -13,7 +13,6 @@ 3. This notice may not be removed or altered from any source distribution. */ - #ifndef BT_DEFORMABLE_MULTIBODY_CONSTRAINT_SOLVER_H #define BT_DEFORMABLE_MULTIBODY_CONSTRAINT_SOLVER_H @@ -32,30 +31,31 @@ class btDeformableBodySolver; ATTRIBUTE_ALIGNED16(class) btDeformableMultiBodyConstraintSolver : public btMultiBodyConstraintSolver { - btDeformableBodySolver* m_deformableSolver; - + btDeformableBodySolver* m_deformableSolver; + protected: - // override the iterations method to include deformable/multibody contact -// virtual btScalar solveGroupCacheFriendlyIterations(btCollisionObject** bodies,int numBodies,btPersistentManifold** manifoldPtr, int numManifolds,btTypedConstraint** constraints,int numConstraints,const btContactSolverInfo& infoGlobal,btIDebugDraw* debugDrawer); - - // write the velocity of the the solver body to the underlying rigid body - void solverBodyWriteBack(const btContactSolverInfo& infoGlobal); - - // write the velocity of the underlying rigid body to the the the solver body - void writeToSolverBody(btCollisionObject** bodies, int numBodies, const btContactSolverInfo& infoGlobal); - - virtual void solveGroupCacheFriendlySplitImpulseIterations(btCollisionObject** bodies, int numBodies, btPersistentManifold** manifoldPtr, int numManifolds, btTypedConstraint** constraints, int numConstraints, const btContactSolverInfo& infoGlobal, btIDebugDraw* debugDrawer); - - virtual btScalar solveDeformableGroupIterations(btCollisionObject** bodies,int numBodies,btCollisionObject** deformableBodies,int numDeformableBodies,btPersistentManifold** manifoldPtr, int numManifolds,btTypedConstraint** constraints,int numConstraints,const btContactSolverInfo& infoGlobal,btIDebugDraw* debugDrawer); + // override the iterations method to include deformable/multibody contact + // virtual btScalar solveGroupCacheFriendlyIterations(btCollisionObject** bodies,int numBodies,btPersistentManifold** manifoldPtr, int numManifolds,btTypedConstraint** constraints,int numConstraints,const btContactSolverInfo& infoGlobal,btIDebugDraw* debugDrawer); + + // write the velocity of the the solver body to the underlying rigid body + void solverBodyWriteBack(const btContactSolverInfo& infoGlobal); + + // write the velocity of the underlying rigid body to the the the solver body + void writeToSolverBody(btCollisionObject * *bodies, int numBodies, const btContactSolverInfo& infoGlobal); + + virtual void solveGroupCacheFriendlySplitImpulseIterations(btCollisionObject * *bodies, int numBodies, btCollisionObject** deformableBodies, int numDeformableBodies, btPersistentManifold** manifoldPtr, int numManifolds, btTypedConstraint** constraints, int numConstraints, const btContactSolverInfo& infoGlobal, btIDebugDraw* debugDrawer); + + virtual btScalar solveDeformableGroupIterations(btCollisionObject * *bodies, int numBodies, btCollisionObject** deformableBodies, int numDeformableBodies, btPersistentManifold** manifoldPtr, int numManifolds, btTypedConstraint** constraints, int numConstraints, const btContactSolverInfo& infoGlobal, btIDebugDraw* debugDrawer); + public: - BT_DECLARE_ALIGNED_ALLOCATOR(); - - void setDeformableSolver(btDeformableBodySolver* deformableSolver) - { - m_deformableSolver = deformableSolver; - } - - virtual void solveDeformableBodyGroup(btCollisionObject * *bodies, int numBodies, btCollisionObject * *deformableBodies, int numDeformableBodies, btPersistentManifold** manifold, int numManifolds, btTypedConstraint** constraints, int numConstraints, btMultiBodyConstraint** multiBodyConstraints, int numMultiBodyConstraints, const btContactSolverInfo& info, btIDebugDraw* debugDrawer, btDispatcher* dispatcher); + BT_DECLARE_ALIGNED_ALLOCATOR(); + + void setDeformableSolver(btDeformableBodySolver * deformableSolver) + { + m_deformableSolver = deformableSolver; + } + + virtual void solveDeformableBodyGroup(btCollisionObject * *bodies, int numBodies, btCollisionObject** deformableBodies, int numDeformableBodies, btPersistentManifold** manifold, int numManifolds, btTypedConstraint** constraints, int numConstraints, btMultiBodyConstraint** multiBodyConstraints, int numMultiBodyConstraints, const btContactSolverInfo& info, btIDebugDraw* debugDrawer, btDispatcher* dispatcher); }; #endif /* BT_DEFORMABLE_MULTIBODY_CONSTRAINT_SOLVER_H */ diff --git a/thirdparty/bullet/BulletSoftBody/btDeformableMultiBodyDynamicsWorld.cpp b/thirdparty/bullet/BulletSoftBody/btDeformableMultiBodyDynamicsWorld.cpp index 6b742978ef..983e622b5f 100644 --- a/thirdparty/bullet/BulletSoftBody/btDeformableMultiBodyDynamicsWorld.cpp +++ b/thirdparty/bullet/BulletSoftBody/btDeformableMultiBodyDynamicsWorld.cpp @@ -40,8 +40,9 @@ The algorithm also closely resembles the one in http://physbam.stanford.edu/~fed #include "LinearMath/btQuickprof.h" #include "btSoftBodyInternals.h" btDeformableMultiBodyDynamicsWorld::btDeformableMultiBodyDynamicsWorld(btDispatcher* dispatcher, btBroadphaseInterface* pairCache, btDeformableMultiBodyConstraintSolver* constraintSolver, btCollisionConfiguration* collisionConfiguration, btDeformableBodySolver* deformableBodySolver) -: btMultiBodyDynamicsWorld(dispatcher, pairCache, (btMultiBodyConstraintSolver*)constraintSolver, collisionConfiguration), -m_deformableBodySolver(deformableBodySolver), m_solverCallback(0) + : btMultiBodyDynamicsWorld(dispatcher, pairCache, (btMultiBodyConstraintSolver*)constraintSolver, collisionConfiguration), + m_deformableBodySolver(deformableBodySolver), + m_solverCallback(0) { m_drawFlags = fDrawFlags::Std; m_drawNodeTree = true; @@ -52,7 +53,7 @@ m_deformableBodySolver(deformableBodySolver), m_solverCallback(0) m_sbi.m_sparsesdf.Initialize(); m_sbi.m_sparsesdf.setDefaultVoxelsz(0.005); m_sbi.m_sparsesdf.Reset(); - + m_sbi.air_density = (btScalar)1.2; m_sbi.water_density = 0; m_sbi.water_offset = 0; @@ -61,57 +62,57 @@ m_deformableBodySolver(deformableBodySolver), m_solverCallback(0) m_internalTime = 0.0; m_implicit = false; m_lineSearch = false; - m_useProjection = true; + m_useProjection = false; m_ccdIterations = 5; m_solverDeformableBodyIslandCallback = new DeformableBodyInplaceSolverIslandCallback(constraintSolver, dispatcher); } btDeformableMultiBodyDynamicsWorld::~btDeformableMultiBodyDynamicsWorld() { - delete m_solverDeformableBodyIslandCallback; + delete m_solverDeformableBodyIslandCallback; } void btDeformableMultiBodyDynamicsWorld::internalSingleStepSimulation(btScalar timeStep) { - BT_PROFILE("internalSingleStepSimulation"); - if (0 != m_internalPreTickCallback) - { - (*m_internalPreTickCallback)(this, timeStep); - } - reinitialize(timeStep); - - // add gravity to velocity of rigid and multi bodys - applyRigidBodyGravity(timeStep); - - ///apply gravity and explicit force to velocity, predict motion - predictUnconstraintMotion(timeStep); - - ///perform collision detection that involves rigid/multi bodies - btMultiBodyDynamicsWorld::performDiscreteCollisionDetection(); - - btMultiBodyDynamicsWorld::calculateSimulationIslands(); - - beforeSolverCallbacks(timeStep); - - ///solve contact constraints and then deformable bodies momemtum equation - solveConstraints(timeStep); - - afterSolverCallbacks(timeStep); + BT_PROFILE("internalSingleStepSimulation"); + if (0 != m_internalPreTickCallback) + { + (*m_internalPreTickCallback)(this, timeStep); + } + reinitialize(timeStep); + + // add gravity to velocity of rigid and multi bodys + applyRigidBodyGravity(timeStep); + + ///apply gravity and explicit force to velocity, predict motion + predictUnconstraintMotion(timeStep); + + ///perform collision detection that involves rigid/multi bodies + btMultiBodyDynamicsWorld::performDiscreteCollisionDetection(); + + btMultiBodyDynamicsWorld::calculateSimulationIslands(); + + beforeSolverCallbacks(timeStep); + + ///solve contact constraints and then deformable bodies momemtum equation + solveConstraints(timeStep); + + afterSolverCallbacks(timeStep); performDeformableCollisionDetection(); - applyRepulsionForce(timeStep); + applyRepulsionForce(timeStep); + + performGeometricCollisions(timeStep); + + integrateTransforms(timeStep); - performGeometricCollisions(timeStep); + ///update vehicle simulation + btMultiBodyDynamicsWorld::updateActions(timeStep); - integrateTransforms(timeStep); - - ///update vehicle simulation - btMultiBodyDynamicsWorld::updateActions(timeStep); - - updateActivationState(timeStep); - // End solver-wise simulation step - // /////////////////////////////// + updateActivationState(timeStep); + // End solver-wise simulation step + // /////////////////////////////// } void btDeformableMultiBodyDynamicsWorld::performDeformableCollisionDetection() @@ -120,7 +121,7 @@ void btDeformableMultiBodyDynamicsWorld::performDeformableCollisionDetection() { m_softBodies[i]->m_softSoftCollision = true; } - + for (int i = 0; i < m_softBodies.size(); ++i) { for (int j = i; j < m_softBodies.size(); ++j) @@ -128,7 +129,7 @@ void btDeformableMultiBodyDynamicsWorld::performDeformableCollisionDetection() m_softBodies[i]->defaultCollisionHandler(m_softBodies[j]); } } - + for (int i = 0; i < m_softBodies.size(); ++i) { m_softBodies[i]->m_softSoftCollision = false; @@ -137,45 +138,45 @@ void btDeformableMultiBodyDynamicsWorld::performDeformableCollisionDetection() void btDeformableMultiBodyDynamicsWorld::updateActivationState(btScalar timeStep) { - for (int i = 0; i < m_softBodies.size(); i++) - { - btSoftBody* psb = m_softBodies[i]; - psb->updateDeactivation(timeStep); - if (psb->wantsSleeping()) - { - if (psb->getActivationState() == ACTIVE_TAG) - psb->setActivationState(WANTS_DEACTIVATION); - if (psb->getActivationState() == ISLAND_SLEEPING) - { - psb->setZeroVelocity(); - } - } - else - { - if (psb->getActivationState() != DISABLE_DEACTIVATION) - psb->setActivationState(ACTIVE_TAG); - } - } - btMultiBodyDynamicsWorld::updateActivationState(timeStep); + for (int i = 0; i < m_softBodies.size(); i++) + { + btSoftBody* psb = m_softBodies[i]; + psb->updateDeactivation(timeStep); + if (psb->wantsSleeping()) + { + if (psb->getActivationState() == ACTIVE_TAG) + psb->setActivationState(WANTS_DEACTIVATION); + if (psb->getActivationState() == ISLAND_SLEEPING) + { + psb->setZeroVelocity(); + } + } + else + { + if (psb->getActivationState() != DISABLE_DEACTIVATION) + psb->setActivationState(ACTIVE_TAG); + } + } + btMultiBodyDynamicsWorld::updateActivationState(timeStep); } void btDeformableMultiBodyDynamicsWorld::applyRepulsionForce(btScalar timeStep) { - BT_PROFILE("btDeformableMultiBodyDynamicsWorld::applyRepulsionForce"); - for (int i = 0; i < m_softBodies.size(); i++) - { - btSoftBody* psb = m_softBodies[i]; - if (psb->isActive()) - { + BT_PROFILE("btDeformableMultiBodyDynamicsWorld::applyRepulsionForce"); + for (int i = 0; i < m_softBodies.size(); i++) + { + btSoftBody* psb = m_softBodies[i]; + if (psb->isActive()) + { psb->applyRepulsionForce(timeStep, true); - } - } + } + } } void btDeformableMultiBodyDynamicsWorld::performGeometricCollisions(btScalar timeStep) { BT_PROFILE("btDeformableMultiBodyDynamicsWorld::performGeometricCollisions"); - // refit the BVH tree for CCD + // refit the BVH tree for CCD for (int i = 0; i < m_softBodies.size(); ++i) { btSoftBody* psb = m_softBodies[i]; @@ -214,7 +215,7 @@ void btDeformableMultiBodyDynamicsWorld::performGeometricCollisions(btScalar tim f.m_vn = (f.m_n[1]->m_v - f.m_n[0]->m_v).cross(f.m_n[2]->m_v - f.m_n[0]->m_v) * timeStep * timeStep; } } - } + } // apply CCD to register new contact points for (int i = 0; i < m_softBodies.size(); ++i) @@ -228,7 +229,7 @@ void btDeformableMultiBodyDynamicsWorld::performGeometricCollisions(btScalar tim m_softBodies[i]->geometricCollisionHandler(m_softBodies[j]); } } - } + } int penetration_count = 0; for (int i = 0; i < m_softBodies.size(); ++i) @@ -258,294 +259,292 @@ void btDeformableMultiBodyDynamicsWorld::performGeometricCollisions(btScalar tim void btDeformableMultiBodyDynamicsWorld::softBodySelfCollision() { - BT_PROFILE("btDeformableMultiBodyDynamicsWorld::softBodySelfCollision"); - for (int i = 0; i < m_softBodies.size(); i++) - { - btSoftBody* psb = m_softBodies[i]; - if (psb->isActive()) - { - psb->defaultCollisionHandler(psb); - } - } + BT_PROFILE("btDeformableMultiBodyDynamicsWorld::softBodySelfCollision"); + for (int i = 0; i < m_softBodies.size(); i++) + { + btSoftBody* psb = m_softBodies[i]; + if (psb->isActive()) + { + psb->defaultCollisionHandler(psb); + } + } } void btDeformableMultiBodyDynamicsWorld::positionCorrection(btScalar timeStep) { - // correct the position of rigid bodies with temporary velocity generated from split impulse - btContactSolverInfo infoGlobal; - btVector3 zero(0,0,0); - for (int i = 0; i < m_nonStaticRigidBodies.size(); ++i) - { - btRigidBody* rb = m_nonStaticRigidBodies[i]; - //correct the position/orientation based on push/turn recovery - btTransform newTransform; - btVector3 pushVelocity = rb->getPushVelocity(); - btVector3 turnVelocity = rb->getTurnVelocity(); - if (pushVelocity[0] != 0.f || pushVelocity[1] != 0 || pushVelocity[2] != 0 || turnVelocity[0] != 0.f || turnVelocity[1] != 0 || turnVelocity[2] != 0) - { - btTransformUtil::integrateTransform(rb->getWorldTransform(), pushVelocity, turnVelocity * infoGlobal.m_splitImpulseTurnErp, timeStep, newTransform); - rb->setWorldTransform(newTransform); - rb->setPushVelocity(zero); - rb->setTurnVelocity(zero); - } - } + // correct the position of rigid bodies with temporary velocity generated from split impulse + btContactSolverInfo infoGlobal; + btVector3 zero(0, 0, 0); + for (int i = 0; i < m_nonStaticRigidBodies.size(); ++i) + { + btRigidBody* rb = m_nonStaticRigidBodies[i]; + //correct the position/orientation based on push/turn recovery + btTransform newTransform; + btVector3 pushVelocity = rb->getPushVelocity(); + btVector3 turnVelocity = rb->getTurnVelocity(); + if (pushVelocity[0] != 0.f || pushVelocity[1] != 0 || pushVelocity[2] != 0 || turnVelocity[0] != 0.f || turnVelocity[1] != 0 || turnVelocity[2] != 0) + { + btTransformUtil::integrateTransform(rb->getWorldTransform(), pushVelocity, turnVelocity * infoGlobal.m_splitImpulseTurnErp, timeStep, newTransform); + rb->setWorldTransform(newTransform); + rb->setPushVelocity(zero); + rb->setTurnVelocity(zero); + } + } } void btDeformableMultiBodyDynamicsWorld::integrateTransforms(btScalar timeStep) { - BT_PROFILE("integrateTransforms"); - positionCorrection(timeStep); - btMultiBodyDynamicsWorld::integrateTransforms(timeStep); - for (int i = 0; i < m_softBodies.size(); ++i) - { - btSoftBody* psb = m_softBodies[i]; - for (int j = 0; j < psb->m_nodes.size(); ++j) - { - btSoftBody::Node& node = psb->m_nodes[j]; - btScalar maxDisplacement = psb->getWorldInfo()->m_maxDisplacement; - btScalar clampDeltaV = maxDisplacement / timeStep; - for (int c = 0; c < 3; c++) - { - if (node.m_v[c] > clampDeltaV) - { - node.m_v[c] = clampDeltaV; - } - if (node.m_v[c] < -clampDeltaV) - { - node.m_v[c] = -clampDeltaV; - } - } - node.m_x = node.m_x + timeStep * node.m_v; - node.m_q = node.m_x; - node.m_vn = node.m_v; - } - // enforce anchor constraints - for (int j = 0; j < psb->m_deformableAnchors.size();++j) - { - btSoftBody::DeformableNodeRigidAnchor& a = psb->m_deformableAnchors[j]; - btSoftBody::Node* n = a.m_node; - n->m_x = a.m_cti.m_colObj->getWorldTransform() * a.m_local; - - // update multibody anchor info - if (a.m_cti.m_colObj->getInternalType() == btCollisionObject::CO_FEATHERSTONE_LINK) - { - btMultiBodyLinkCollider* multibodyLinkCol = (btMultiBodyLinkCollider*)btMultiBodyLinkCollider::upcast(a.m_cti.m_colObj); - if (multibodyLinkCol) - { - btVector3 nrm; - const btCollisionShape* shp = multibodyLinkCol->getCollisionShape(); - const btTransform& wtr = multibodyLinkCol->getWorldTransform(); - psb->m_worldInfo->m_sparsesdf.Evaluate( - wtr.invXform(n->m_x), - shp, - nrm, - 0); - a.m_cti.m_normal = wtr.getBasis() * nrm; - btVector3 normal = a.m_cti.m_normal; - btVector3 t1 = generateUnitOrthogonalVector(normal); - btVector3 t2 = btCross(normal, t1); - btMultiBodyJacobianData jacobianData_normal, jacobianData_t1, jacobianData_t2; - findJacobian(multibodyLinkCol, jacobianData_normal, a.m_node->m_x, normal); - findJacobian(multibodyLinkCol, jacobianData_t1, a.m_node->m_x, t1); - findJacobian(multibodyLinkCol, jacobianData_t2, a.m_node->m_x, t2); - - btScalar* J_n = &jacobianData_normal.m_jacobians[0]; - btScalar* J_t1 = &jacobianData_t1.m_jacobians[0]; - btScalar* J_t2 = &jacobianData_t2.m_jacobians[0]; - - btScalar* u_n = &jacobianData_normal.m_deltaVelocitiesUnitImpulse[0]; - btScalar* u_t1 = &jacobianData_t1.m_deltaVelocitiesUnitImpulse[0]; - btScalar* u_t2 = &jacobianData_t2.m_deltaVelocitiesUnitImpulse[0]; - - btMatrix3x3 rot(normal.getX(), normal.getY(), normal.getZ(), - t1.getX(), t1.getY(), t1.getZ(), - t2.getX(), t2.getY(), t2.getZ()); // world frame to local frame - const int ndof = multibodyLinkCol->m_multiBody->getNumDofs() + 6; - btMatrix3x3 local_impulse_matrix = (Diagonal(n->m_im) + OuterProduct(J_n, J_t1, J_t2, u_n, u_t1, u_t2, ndof)).inverse(); - a.m_c0 = rot.transpose() * local_impulse_matrix * rot; - a.jacobianData_normal = jacobianData_normal; - a.jacobianData_t1 = jacobianData_t1; - a.jacobianData_t2 = jacobianData_t2; - a.t1 = t1; - a.t2 = t2; - } - } - } - psb->interpolateRenderMesh(); - } + BT_PROFILE("integrateTransforms"); + positionCorrection(timeStep); + btMultiBodyDynamicsWorld::integrateTransforms(timeStep); + for (int i = 0; i < m_softBodies.size(); ++i) + { + btSoftBody* psb = m_softBodies[i]; + for (int j = 0; j < psb->m_nodes.size(); ++j) + { + btSoftBody::Node& node = psb->m_nodes[j]; + btScalar maxDisplacement = psb->getWorldInfo()->m_maxDisplacement; + btScalar clampDeltaV = maxDisplacement / timeStep; + for (int c = 0; c < 3; c++) + { + if (node.m_v[c] > clampDeltaV) + { + node.m_v[c] = clampDeltaV; + } + if (node.m_v[c] < -clampDeltaV) + { + node.m_v[c] = -clampDeltaV; + } + } + node.m_x = node.m_x + timeStep * (node.m_v + node.m_splitv); + node.m_q = node.m_x; + node.m_vn = node.m_v; + } + // enforce anchor constraints + for (int j = 0; j < psb->m_deformableAnchors.size(); ++j) + { + btSoftBody::DeformableNodeRigidAnchor& a = psb->m_deformableAnchors[j]; + btSoftBody::Node* n = a.m_node; + n->m_x = a.m_cti.m_colObj->getWorldTransform() * a.m_local; + + // update multibody anchor info + if (a.m_cti.m_colObj->getInternalType() == btCollisionObject::CO_FEATHERSTONE_LINK) + { + btMultiBodyLinkCollider* multibodyLinkCol = (btMultiBodyLinkCollider*)btMultiBodyLinkCollider::upcast(a.m_cti.m_colObj); + if (multibodyLinkCol) + { + btVector3 nrm; + const btCollisionShape* shp = multibodyLinkCol->getCollisionShape(); + const btTransform& wtr = multibodyLinkCol->getWorldTransform(); + psb->m_worldInfo->m_sparsesdf.Evaluate( + wtr.invXform(n->m_x), + shp, + nrm, + 0); + a.m_cti.m_normal = wtr.getBasis() * nrm; + btVector3 normal = a.m_cti.m_normal; + btVector3 t1 = generateUnitOrthogonalVector(normal); + btVector3 t2 = btCross(normal, t1); + btMultiBodyJacobianData jacobianData_normal, jacobianData_t1, jacobianData_t2; + findJacobian(multibodyLinkCol, jacobianData_normal, a.m_node->m_x, normal); + findJacobian(multibodyLinkCol, jacobianData_t1, a.m_node->m_x, t1); + findJacobian(multibodyLinkCol, jacobianData_t2, a.m_node->m_x, t2); + + btScalar* J_n = &jacobianData_normal.m_jacobians[0]; + btScalar* J_t1 = &jacobianData_t1.m_jacobians[0]; + btScalar* J_t2 = &jacobianData_t2.m_jacobians[0]; + + btScalar* u_n = &jacobianData_normal.m_deltaVelocitiesUnitImpulse[0]; + btScalar* u_t1 = &jacobianData_t1.m_deltaVelocitiesUnitImpulse[0]; + btScalar* u_t2 = &jacobianData_t2.m_deltaVelocitiesUnitImpulse[0]; + + btMatrix3x3 rot(normal.getX(), normal.getY(), normal.getZ(), + t1.getX(), t1.getY(), t1.getZ(), + t2.getX(), t2.getY(), t2.getZ()); // world frame to local frame + const int ndof = multibodyLinkCol->m_multiBody->getNumDofs() + 6; + btMatrix3x3 local_impulse_matrix = (Diagonal(n->m_im) + OuterProduct(J_n, J_t1, J_t2, u_n, u_t1, u_t2, ndof)).inverse(); + a.m_c0 = rot.transpose() * local_impulse_matrix * rot; + a.jacobianData_normal = jacobianData_normal; + a.jacobianData_t1 = jacobianData_t1; + a.jacobianData_t2 = jacobianData_t2; + a.t1 = t1; + a.t2 = t2; + } + } + } + psb->interpolateRenderMesh(); + } } void btDeformableMultiBodyDynamicsWorld::solveConstraints(btScalar timeStep) { - BT_PROFILE("btDeformableMultiBodyDynamicsWorld::solveConstraints"); - // save v_{n+1}^* velocity after explicit forces - m_deformableBodySolver->backupVelocity(); - - // set up constraints among multibodies and between multibodies and deformable bodies - setupConstraints(); - - // solve contact constraints - solveContactConstraints(); - - // set up the directions in which the velocity does not change in the momentum solve - if (m_useProjection) - m_deformableBodySolver->m_objective->m_projection.setProjection(); - else - m_deformableBodySolver->m_objective->m_projection.setLagrangeMultiplier(); - - // for explicit scheme, m_backupVelocity = v_{n+1}^* - // for implicit scheme, m_backupVelocity = v_n - // Here, set dv = v_{n+1} - v_n for nodes in contact - m_deformableBodySolver->setupDeformableSolve(m_implicit); - - // At this point, dv should be golden for nodes in contact - // proceed to solve deformable momentum equation - m_deformableBodySolver->solveDeformableConstraints(timeStep); + BT_PROFILE("btDeformableMultiBodyDynamicsWorld::solveConstraints"); + // save v_{n+1}^* velocity after explicit forces + m_deformableBodySolver->backupVelocity(); + + // set up constraints among multibodies and between multibodies and deformable bodies + setupConstraints(); + + // solve contact constraints + solveContactConstraints(); + + // set up the directions in which the velocity does not change in the momentum solve + if (m_useProjection) + m_deformableBodySolver->m_objective->m_projection.setProjection(); + else + m_deformableBodySolver->m_objective->m_projection.setLagrangeMultiplier(); + + // for explicit scheme, m_backupVelocity = v_{n+1}^* + // for implicit scheme, m_backupVelocity = v_n + // Here, set dv = v_{n+1} - v_n for nodes in contact + m_deformableBodySolver->setupDeformableSolve(m_implicit); + + // At this point, dv should be golden for nodes in contact + // proceed to solve deformable momentum equation + m_deformableBodySolver->solveDeformableConstraints(timeStep); } void btDeformableMultiBodyDynamicsWorld::setupConstraints() { - // set up constraints between multibody and deformable bodies - m_deformableBodySolver->setConstraints(m_solverInfo); - - // set up constraints among multibodies - { - sortConstraints(); - // setup the solver callback - btMultiBodyConstraint** sortedMultiBodyConstraints = m_sortedMultiBodyConstraints.size() ? &m_sortedMultiBodyConstraints[0] : 0; - btTypedConstraint** constraintsPtr = getNumConstraints() ? &m_sortedConstraints[0] : 0; - m_solverDeformableBodyIslandCallback->setup(&m_solverInfo, constraintsPtr, m_sortedConstraints.size(), sortedMultiBodyConstraints, m_sortedMultiBodyConstraints.size(), getDebugDrawer()); - - // build islands - m_islandManager->buildIslands(getCollisionWorld()->getDispatcher(), getCollisionWorld()); - } + // set up constraints between multibody and deformable bodies + m_deformableBodySolver->setConstraints(m_solverInfo); + + // set up constraints among multibodies + { + sortConstraints(); + // setup the solver callback + btMultiBodyConstraint** sortedMultiBodyConstraints = m_sortedMultiBodyConstraints.size() ? &m_sortedMultiBodyConstraints[0] : 0; + btTypedConstraint** constraintsPtr = getNumConstraints() ? &m_sortedConstraints[0] : 0; + m_solverDeformableBodyIslandCallback->setup(&m_solverInfo, constraintsPtr, m_sortedConstraints.size(), sortedMultiBodyConstraints, m_sortedMultiBodyConstraints.size(), getDebugDrawer()); + + // build islands + m_islandManager->buildIslands(getCollisionWorld()->getDispatcher(), getCollisionWorld()); + } } void btDeformableMultiBodyDynamicsWorld::sortConstraints() { - m_sortedConstraints.resize(m_constraints.size()); - int i; - for (i = 0; i < getNumConstraints(); i++) - { - m_sortedConstraints[i] = m_constraints[i]; - } - m_sortedConstraints.quickSort(btSortConstraintOnIslandPredicate2()); - - m_sortedMultiBodyConstraints.resize(m_multiBodyConstraints.size()); - for (i = 0; i < m_multiBodyConstraints.size(); i++) - { - m_sortedMultiBodyConstraints[i] = m_multiBodyConstraints[i]; - } - m_sortedMultiBodyConstraints.quickSort(btSortMultiBodyConstraintOnIslandPredicate()); + m_sortedConstraints.resize(m_constraints.size()); + int i; + for (i = 0; i < getNumConstraints(); i++) + { + m_sortedConstraints[i] = m_constraints[i]; + } + m_sortedConstraints.quickSort(btSortConstraintOnIslandPredicate2()); + + m_sortedMultiBodyConstraints.resize(m_multiBodyConstraints.size()); + for (i = 0; i < m_multiBodyConstraints.size(); i++) + { + m_sortedMultiBodyConstraints[i] = m_multiBodyConstraints[i]; + } + m_sortedMultiBodyConstraints.quickSort(btSortMultiBodyConstraintOnIslandPredicate()); } - - + void btDeformableMultiBodyDynamicsWorld::solveContactConstraints() { - // process constraints on each island - m_islandManager->processIslands(getCollisionWorld()->getDispatcher(), getCollisionWorld(), m_solverDeformableBodyIslandCallback); - - // process deferred - m_solverDeformableBodyIslandCallback->processConstraints(); - m_constraintSolver->allSolved(m_solverInfo, m_debugDrawer); - - // write joint feedback - { - for (int i = 0; i < this->m_multiBodies.size(); i++) - { - btMultiBody* bod = m_multiBodies[i]; - - bool isSleeping = false; - - if (bod->getBaseCollider() && bod->getBaseCollider()->getActivationState() == ISLAND_SLEEPING) - { - isSleeping = true; - } - for (int b = 0; b < bod->getNumLinks(); b++) - { - if (bod->getLink(b).m_collider && bod->getLink(b).m_collider->getActivationState() == ISLAND_SLEEPING) - isSleeping = true; - } - - if (!isSleeping) - { - //useless? they get resized in stepVelocities once again (AND DIFFERENTLY) - m_scratch_r.resize(bod->getNumLinks() + 1); //multidof? ("Y"s use it and it is used to store qdd) - m_scratch_v.resize(bod->getNumLinks() + 1); - m_scratch_m.resize(bod->getNumLinks() + 1); - - if (bod->internalNeedsJointFeedback()) - { - if (!bod->isUsingRK4Integration()) - { - if (bod->internalNeedsJointFeedback()) - { - bool isConstraintPass = true; - bod->computeAccelerationsArticulatedBodyAlgorithmMultiDof(m_solverInfo.m_timeStep, m_scratch_r, m_scratch_v, m_scratch_m, isConstraintPass, - getSolverInfo().m_jointFeedbackInWorldSpace, - getSolverInfo().m_jointFeedbackInJointFrame); - } - } - } - } - } - } - - for (int i = 0; i < this->m_multiBodies.size(); i++) - { - btMultiBody* bod = m_multiBodies[i]; - bod->processDeltaVeeMultiDof2(); - } + // process constraints on each island + m_islandManager->processIslands(getCollisionWorld()->getDispatcher(), getCollisionWorld(), m_solverDeformableBodyIslandCallback); + + // process deferred + m_solverDeformableBodyIslandCallback->processConstraints(); + m_constraintSolver->allSolved(m_solverInfo, m_debugDrawer); + + // write joint feedback + { + for (int i = 0; i < this->m_multiBodies.size(); i++) + { + btMultiBody* bod = m_multiBodies[i]; + + bool isSleeping = false; + + if (bod->getBaseCollider() && bod->getBaseCollider()->getActivationState() == ISLAND_SLEEPING) + { + isSleeping = true; + } + for (int b = 0; b < bod->getNumLinks(); b++) + { + if (bod->getLink(b).m_collider && bod->getLink(b).m_collider->getActivationState() == ISLAND_SLEEPING) + isSleeping = true; + } + + if (!isSleeping) + { + //useless? they get resized in stepVelocities once again (AND DIFFERENTLY) + m_scratch_r.resize(bod->getNumLinks() + 1); //multidof? ("Y"s use it and it is used to store qdd) + m_scratch_v.resize(bod->getNumLinks() + 1); + m_scratch_m.resize(bod->getNumLinks() + 1); + + if (bod->internalNeedsJointFeedback()) + { + if (!bod->isUsingRK4Integration()) + { + if (bod->internalNeedsJointFeedback()) + { + bool isConstraintPass = true; + bod->computeAccelerationsArticulatedBodyAlgorithmMultiDof(m_solverInfo.m_timeStep, m_scratch_r, m_scratch_v, m_scratch_m, isConstraintPass, + getSolverInfo().m_jointFeedbackInWorldSpace, + getSolverInfo().m_jointFeedbackInJointFrame); + } + } + } + } + } + } + + for (int i = 0; i < this->m_multiBodies.size(); i++) + { + btMultiBody* bod = m_multiBodies[i]; + bod->processDeltaVeeMultiDof2(); + } } void btDeformableMultiBodyDynamicsWorld::addSoftBody(btSoftBody* body, int collisionFilterGroup, int collisionFilterMask) { - m_softBodies.push_back(body); - - // Set the soft body solver that will deal with this body - // to be the world's solver - body->setSoftBodySolver(m_deformableBodySolver); - - btCollisionWorld::addCollisionObject(body, - collisionFilterGroup, - collisionFilterMask); + m_softBodies.push_back(body); + + // Set the soft body solver that will deal with this body + // to be the world's solver + body->setSoftBodySolver(m_deformableBodySolver); + + btCollisionWorld::addCollisionObject(body, + collisionFilterGroup, + collisionFilterMask); } void btDeformableMultiBodyDynamicsWorld::predictUnconstraintMotion(btScalar timeStep) { - BT_PROFILE("predictUnconstraintMotion"); - btMultiBodyDynamicsWorld::predictUnconstraintMotion(timeStep); - m_deformableBodySolver->predictMotion(timeStep); + BT_PROFILE("predictUnconstraintMotion"); + btMultiBodyDynamicsWorld::predictUnconstraintMotion(timeStep); + m_deformableBodySolver->predictMotion(timeStep); } void btDeformableMultiBodyDynamicsWorld::reinitialize(btScalar timeStep) { - m_internalTime += timeStep; - m_deformableBodySolver->setImplicit(m_implicit); - m_deformableBodySolver->setLineSearch(m_lineSearch); - m_deformableBodySolver->reinitialize(m_softBodies, timeStep); - btDispatcherInfo& dispatchInfo = btMultiBodyDynamicsWorld::getDispatchInfo(); - dispatchInfo.m_timeStep = timeStep; - dispatchInfo.m_stepCount = 0; - dispatchInfo.m_debugDraw = btMultiBodyDynamicsWorld::getDebugDrawer(); - btMultiBodyDynamicsWorld::getSolverInfo().m_timeStep = timeStep; - if (m_useProjection) - { - m_deformableBodySolver->m_useProjection = true; -// m_deformableBodySolver->m_objective->m_projection.m_useStrainLimiting = true; - m_deformableBodySolver->m_objective->m_preconditioner = m_deformableBodySolver->m_objective->m_massPreconditioner; - } - else - { - m_deformableBodySolver->m_objective->m_preconditioner = m_deformableBodySolver->m_objective->m_KKTPreconditioner; - } - + m_internalTime += timeStep; + m_deformableBodySolver->setImplicit(m_implicit); + m_deformableBodySolver->setLineSearch(m_lineSearch); + m_deformableBodySolver->reinitialize(m_softBodies, timeStep); + btDispatcherInfo& dispatchInfo = btMultiBodyDynamicsWorld::getDispatchInfo(); + dispatchInfo.m_timeStep = timeStep; + dispatchInfo.m_stepCount = 0; + dispatchInfo.m_debugDraw = btMultiBodyDynamicsWorld::getDebugDrawer(); + btMultiBodyDynamicsWorld::getSolverInfo().m_timeStep = timeStep; + if (m_useProjection) + { + m_deformableBodySolver->m_useProjection = true; + m_deformableBodySolver->m_objective->m_projection.m_useStrainLimiting = true; + m_deformableBodySolver->m_objective->m_preconditioner = m_deformableBodySolver->m_objective->m_massPreconditioner; + } + else + { + m_deformableBodySolver->m_useProjection = false; + m_deformableBodySolver->m_objective->m_projection.m_useStrainLimiting = false; + m_deformableBodySolver->m_objective->m_preconditioner = m_deformableBodySolver->m_objective->m_KKTPreconditioner; + } } - void btDeformableMultiBodyDynamicsWorld::debugDrawWorld() { - btMultiBodyDynamicsWorld::debugDrawWorld(); for (int i = 0; i < getSoftBodyArray().size(); i++) @@ -556,253 +555,260 @@ void btDeformableMultiBodyDynamicsWorld::debugDrawWorld() btSoftBodyHelpers::Draw(psb, getDebugDrawer(), getDrawFlags()); } } - - } void btDeformableMultiBodyDynamicsWorld::applyRigidBodyGravity(btScalar timeStep) { - // Gravity is applied in stepSimulation and then cleared here and then applied here and then cleared here again - // so that 1) gravity is applied to velocity before constraint solve and 2) gravity is applied in each substep - // when there are multiple substeps - btMultiBodyDynamicsWorld::applyGravity(); - // integrate rigid body gravity - for (int i = 0; i < m_nonStaticRigidBodies.size(); ++i) - { - btRigidBody* rb = m_nonStaticRigidBodies[i]; - rb->integrateVelocities(timeStep); - } - - // integrate multibody gravity - { - forwardKinematics(); - clearMultiBodyConstraintForces(); - { - for (int i = 0; i < this->m_multiBodies.size(); i++) - { - btMultiBody* bod = m_multiBodies[i]; - - bool isSleeping = false; - - if (bod->getBaseCollider() && bod->getBaseCollider()->getActivationState() == ISLAND_SLEEPING) - { - isSleeping = true; - } - for (int b = 0; b < bod->getNumLinks(); b++) - { - if (bod->getLink(b).m_collider && bod->getLink(b).m_collider->getActivationState() == ISLAND_SLEEPING) - isSleeping = true; - } - - if (!isSleeping) - { - m_scratch_r.resize(bod->getNumLinks() + 1); - m_scratch_v.resize(bod->getNumLinks() + 1); - m_scratch_m.resize(bod->getNumLinks() + 1); - bool isConstraintPass = false; - { - if (!bod->isUsingRK4Integration()) - { - bod->computeAccelerationsArticulatedBodyAlgorithmMultiDof(m_solverInfo.m_timeStep, - m_scratch_r, m_scratch_v, m_scratch_m,isConstraintPass, - getSolverInfo().m_jointFeedbackInWorldSpace, - getSolverInfo().m_jointFeedbackInJointFrame); - } - else - { - btAssert(" RK4Integration is not supported" ); - } - } - } - } - } - } - clearGravity(); + // Gravity is applied in stepSimulation and then cleared here and then applied here and then cleared here again + // so that 1) gravity is applied to velocity before constraint solve and 2) gravity is applied in each substep + // when there are multiple substeps + btMultiBodyDynamicsWorld::applyGravity(); + // integrate rigid body gravity + for (int i = 0; i < m_nonStaticRigidBodies.size(); ++i) + { + btRigidBody* rb = m_nonStaticRigidBodies[i]; + rb->integrateVelocities(timeStep); + } + + // integrate multibody gravity + { + forwardKinematics(); + clearMultiBodyConstraintForces(); + { + for (int i = 0; i < this->m_multiBodies.size(); i++) + { + btMultiBody* bod = m_multiBodies[i]; + + bool isSleeping = false; + + if (bod->getBaseCollider() && bod->getBaseCollider()->getActivationState() == ISLAND_SLEEPING) + { + isSleeping = true; + } + for (int b = 0; b < bod->getNumLinks(); b++) + { + if (bod->getLink(b).m_collider && bod->getLink(b).m_collider->getActivationState() == ISLAND_SLEEPING) + isSleeping = true; + } + + if (!isSleeping) + { + m_scratch_r.resize(bod->getNumLinks() + 1); + m_scratch_v.resize(bod->getNumLinks() + 1); + m_scratch_m.resize(bod->getNumLinks() + 1); + bool isConstraintPass = false; + { + if (!bod->isUsingRK4Integration()) + { + bod->computeAccelerationsArticulatedBodyAlgorithmMultiDof(m_solverInfo.m_timeStep, + m_scratch_r, m_scratch_v, m_scratch_m, isConstraintPass, + getSolverInfo().m_jointFeedbackInWorldSpace, + getSolverInfo().m_jointFeedbackInJointFrame); + } + else + { + btAssert(" RK4Integration is not supported"); + } + } + } + } + } + } + clearGravity(); } void btDeformableMultiBodyDynamicsWorld::clearGravity() { - BT_PROFILE("btMultiBody clearGravity"); - // clear rigid body gravity - for (int i = 0; i < m_nonStaticRigidBodies.size(); i++) - { - btRigidBody* body = m_nonStaticRigidBodies[i]; - if (body->isActive()) - { - body->clearGravity(); - } - } - // clear multibody gravity - for (int i = 0; i < this->m_multiBodies.size(); i++) - { - btMultiBody* bod = m_multiBodies[i]; - - bool isSleeping = false; - - if (bod->getBaseCollider() && bod->getBaseCollider()->getActivationState() == ISLAND_SLEEPING) - { - isSleeping = true; - } - for (int b = 0; b < bod->getNumLinks(); b++) - { - if (bod->getLink(b).m_collider && bod->getLink(b).m_collider->getActivationState() == ISLAND_SLEEPING) - isSleeping = true; - } - - if (!isSleeping) - { - bod->addBaseForce(-m_gravity * bod->getBaseMass()); - - for (int j = 0; j < bod->getNumLinks(); ++j) - { - bod->addLinkForce(j, -m_gravity * bod->getLinkMass(j)); - } - } - } + BT_PROFILE("btMultiBody clearGravity"); + // clear rigid body gravity + for (int i = 0; i < m_nonStaticRigidBodies.size(); i++) + { + btRigidBody* body = m_nonStaticRigidBodies[i]; + if (body->isActive()) + { + body->clearGravity(); + } + } + // clear multibody gravity + for (int i = 0; i < this->m_multiBodies.size(); i++) + { + btMultiBody* bod = m_multiBodies[i]; + + bool isSleeping = false; + + if (bod->getBaseCollider() && bod->getBaseCollider()->getActivationState() == ISLAND_SLEEPING) + { + isSleeping = true; + } + for (int b = 0; b < bod->getNumLinks(); b++) + { + if (bod->getLink(b).m_collider && bod->getLink(b).m_collider->getActivationState() == ISLAND_SLEEPING) + isSleeping = true; + } + + if (!isSleeping) + { + bod->addBaseForce(-m_gravity * bod->getBaseMass()); + + for (int j = 0; j < bod->getNumLinks(); ++j) + { + bod->addLinkForce(j, -m_gravity * bod->getLinkMass(j)); + } + } + } } void btDeformableMultiBodyDynamicsWorld::beforeSolverCallbacks(btScalar timeStep) { - if (0 != m_internalTickCallback) - { - (*m_internalTickCallback)(this, timeStep); - } - - if (0 != m_solverCallback) - { - (*m_solverCallback)(m_internalTime, this); - } + if (0 != m_internalTickCallback) + { + (*m_internalTickCallback)(this, timeStep); + } + + if (0 != m_solverCallback) + { + (*m_solverCallback)(m_internalTime, this); + } } void btDeformableMultiBodyDynamicsWorld::afterSolverCallbacks(btScalar timeStep) { - if (0 != m_solverCallback) - { - (*m_solverCallback)(m_internalTime, this); - } + if (0 != m_solverCallback) + { + (*m_solverCallback)(m_internalTime, this); + } } void btDeformableMultiBodyDynamicsWorld::addForce(btSoftBody* psb, btDeformableLagrangianForce* force) { - btAlignedObjectArray<btDeformableLagrangianForce*>& forces = m_deformableBodySolver->m_objective->m_lf; - bool added = false; - for (int i = 0; i < forces.size(); ++i) - { - if (forces[i]->getForceType() == force->getForceType()) - { - forces[i]->addSoftBody(psb); - added = true; - break; - } - } - if (!added) - { - force->addSoftBody(psb); - force->setIndices(m_deformableBodySolver->m_objective->getIndices()); - forces.push_back(force); - } + btAlignedObjectArray<btDeformableLagrangianForce*>& forces = m_deformableBodySolver->m_objective->m_lf; + bool added = false; + for (int i = 0; i < forces.size(); ++i) + { + if (forces[i]->getForceType() == force->getForceType()) + { + forces[i]->addSoftBody(psb); + added = true; + break; + } + } + if (!added) + { + force->addSoftBody(psb); + force->setIndices(m_deformableBodySolver->m_objective->getIndices()); + forces.push_back(force); + } } void btDeformableMultiBodyDynamicsWorld::removeForce(btSoftBody* psb, btDeformableLagrangianForce* force) { - btAlignedObjectArray<btDeformableLagrangianForce*>& forces = m_deformableBodySolver->m_objective->m_lf; - int removed_index = -1; - for (int i = 0; i < forces.size(); ++i) - { - if (forces[i]->getForceType() == force->getForceType()) - { - forces[i]->removeSoftBody(psb); - if (forces[i]->m_softBodies.size() == 0) - removed_index = i; - break; - } - } - if (removed_index >= 0) - forces.removeAtIndex(removed_index); + btAlignedObjectArray<btDeformableLagrangianForce*>& forces = m_deformableBodySolver->m_objective->m_lf; + int removed_index = -1; + for (int i = 0; i < forces.size(); ++i) + { + if (forces[i]->getForceType() == force->getForceType()) + { + forces[i]->removeSoftBody(psb); + if (forces[i]->m_softBodies.size() == 0) + removed_index = i; + break; + } + } + if (removed_index >= 0) + forces.removeAtIndex(removed_index); +} + +void btDeformableMultiBodyDynamicsWorld::removeSoftBodyForce(btSoftBody* psb) +{ + btAlignedObjectArray<btDeformableLagrangianForce*>& forces = m_deformableBodySolver->m_objective->m_lf; + for (int i = 0; i < forces.size(); ++i) + { + forces[i]->removeSoftBody(psb); + } } void btDeformableMultiBodyDynamicsWorld::removeSoftBody(btSoftBody* body) { - m_softBodies.remove(body); - btCollisionWorld::removeCollisionObject(body); - // force a reinitialize so that node indices get updated. - m_deformableBodySolver->reinitialize(m_softBodies, btScalar(-1)); + removeSoftBodyForce(body); + m_softBodies.remove(body); + btCollisionWorld::removeCollisionObject(body); + // force a reinitialize so that node indices get updated. + m_deformableBodySolver->reinitialize(m_softBodies, btScalar(-1)); } void btDeformableMultiBodyDynamicsWorld::removeCollisionObject(btCollisionObject* collisionObject) { - btSoftBody* body = btSoftBody::upcast(collisionObject); - if (body) - removeSoftBody(body); - else - btDiscreteDynamicsWorld::removeCollisionObject(collisionObject); + btSoftBody* body = btSoftBody::upcast(collisionObject); + if (body) + removeSoftBody(body); + else + btDiscreteDynamicsWorld::removeCollisionObject(collisionObject); } - int btDeformableMultiBodyDynamicsWorld::stepSimulation(btScalar timeStep, int maxSubSteps, btScalar fixedTimeStep) { - startProfiling(timeStep); - - int numSimulationSubSteps = 0; - - if (maxSubSteps) - { - //fixed timestep with interpolation - m_fixedTimeStep = fixedTimeStep; - m_localTime += timeStep; - if (m_localTime >= fixedTimeStep) - { - numSimulationSubSteps = int(m_localTime / fixedTimeStep); - m_localTime -= numSimulationSubSteps * fixedTimeStep; - } - } - else - { - //variable timestep - fixedTimeStep = timeStep; - m_localTime = m_latencyMotionStateInterpolation ? 0 : timeStep; - m_fixedTimeStep = 0; - if (btFuzzyZero(timeStep)) - { - numSimulationSubSteps = 0; - maxSubSteps = 0; - } - else - { - numSimulationSubSteps = 1; - maxSubSteps = 1; - } - } - - //process some debugging flags - if (getDebugDrawer()) - { - btIDebugDraw* debugDrawer = getDebugDrawer(); - gDisableDeactivation = (debugDrawer->getDebugMode() & btIDebugDraw::DBG_NoDeactivation) != 0; - } - if (numSimulationSubSteps) - { - //clamp the number of substeps, to prevent simulation grinding spiralling down to a halt - int clampedSimulationSteps = (numSimulationSubSteps > maxSubSteps) ? maxSubSteps : numSimulationSubSteps; - - saveKinematicState(fixedTimeStep * clampedSimulationSteps); - - for (int i = 0; i < clampedSimulationSteps; i++) - { - internalSingleStepSimulation(fixedTimeStep); - synchronizeMotionStates(); - } - } - else - { - synchronizeMotionStates(); - } - - clearForces(); - + startProfiling(timeStep); + + int numSimulationSubSteps = 0; + + if (maxSubSteps) + { + //fixed timestep with interpolation + m_fixedTimeStep = fixedTimeStep; + m_localTime += timeStep; + if (m_localTime >= fixedTimeStep) + { + numSimulationSubSteps = int(m_localTime / fixedTimeStep); + m_localTime -= numSimulationSubSteps * fixedTimeStep; + } + } + else + { + //variable timestep + fixedTimeStep = timeStep; + m_localTime = m_latencyMotionStateInterpolation ? 0 : timeStep; + m_fixedTimeStep = 0; + if (btFuzzyZero(timeStep)) + { + numSimulationSubSteps = 0; + maxSubSteps = 0; + } + else + { + numSimulationSubSteps = 1; + maxSubSteps = 1; + } + } + + //process some debugging flags + if (getDebugDrawer()) + { + btIDebugDraw* debugDrawer = getDebugDrawer(); + gDisableDeactivation = (debugDrawer->getDebugMode() & btIDebugDraw::DBG_NoDeactivation) != 0; + } + if (numSimulationSubSteps) + { + //clamp the number of substeps, to prevent simulation grinding spiralling down to a halt + int clampedSimulationSteps = (numSimulationSubSteps > maxSubSteps) ? maxSubSteps : numSimulationSubSteps; + + saveKinematicState(fixedTimeStep * clampedSimulationSteps); + + for (int i = 0; i < clampedSimulationSteps; i++) + { + internalSingleStepSimulation(fixedTimeStep); + synchronizeMotionStates(); + } + } + else + { + synchronizeMotionStates(); + } + + clearForces(); + #ifndef BT_NO_PROFILE - CProfileManager::Increment_Frame_Counter(); + CProfileManager::Increment_Frame_Counter(); #endif //BT_NO_PROFILE - - return numSimulationSubSteps; + + return numSimulationSubSteps; } diff --git a/thirdparty/bullet/BulletSoftBody/btDeformableMultiBodyDynamicsWorld.h b/thirdparty/bullet/BulletSoftBody/btDeformableMultiBodyDynamicsWorld.h index 76b58a0378..4b7069aac7 100644 --- a/thirdparty/bullet/BulletSoftBody/btDeformableMultiBodyDynamicsWorld.h +++ b/thirdparty/bullet/BulletSoftBody/btDeformableMultiBodyDynamicsWorld.h @@ -36,185 +36,192 @@ typedef btAlignedObjectArray<btSoftBody*> btSoftBodyArray; class btDeformableMultiBodyDynamicsWorld : public btMultiBodyDynamicsWorld { - typedef btAlignedObjectArray<btVector3> TVStack; - ///Solver classes that encapsulate multiple deformable bodies for solving - btDeformableBodySolver* m_deformableBodySolver; - btSoftBodyArray m_softBodies; - int m_drawFlags; - bool m_drawNodeTree; - bool m_drawFaceTree; - bool m_drawClusterTree; - btSoftBodyWorldInfo m_sbi; - btScalar m_internalTime; - int m_ccdIterations; - bool m_implicit; - bool m_lineSearch; - bool m_useProjection; - DeformableBodyInplaceSolverIslandCallback* m_solverDeformableBodyIslandCallback; - - typedef void (*btSolverCallback)(btScalar time, btDeformableMultiBodyDynamicsWorld* world); - btSolverCallback m_solverCallback; - + typedef btAlignedObjectArray<btVector3> TVStack; + ///Solver classes that encapsulate multiple deformable bodies for solving + btDeformableBodySolver* m_deformableBodySolver; + btSoftBodyArray m_softBodies; + int m_drawFlags; + bool m_drawNodeTree; + bool m_drawFaceTree; + bool m_drawClusterTree; + btSoftBodyWorldInfo m_sbi; + btScalar m_internalTime; + int m_ccdIterations; + bool m_implicit; + bool m_lineSearch; + bool m_useProjection; + DeformableBodyInplaceSolverIslandCallback* m_solverDeformableBodyIslandCallback; + + typedef void (*btSolverCallback)(btScalar time, btDeformableMultiBodyDynamicsWorld* world); + btSolverCallback m_solverCallback; + protected: - virtual void internalSingleStepSimulation(btScalar timeStep); - - virtual void integrateTransforms(btScalar timeStep); - - void positionCorrection(btScalar timeStep); - - void solveConstraints(btScalar timeStep); - - void updateActivationState(btScalar timeStep); - - void clearGravity(); - + virtual void internalSingleStepSimulation(btScalar timeStep); + + virtual void integrateTransforms(btScalar timeStep); + + void positionCorrection(btScalar timeStep); + + void solveConstraints(btScalar timeStep); + + void updateActivationState(btScalar timeStep); + + void clearGravity(); + public: btDeformableMultiBodyDynamicsWorld(btDispatcher* dispatcher, btBroadphaseInterface* pairCache, btDeformableMultiBodyConstraintSolver* constraintSolver, btCollisionConfiguration* collisionConfiguration, btDeformableBodySolver* deformableBodySolver = 0); - virtual int stepSimulation(btScalar timeStep, int maxSubSteps = 1, btScalar fixedTimeStep = btScalar(1.) / btScalar(60.)); + virtual int stepSimulation(btScalar timeStep, int maxSubSteps = 1, btScalar fixedTimeStep = btScalar(1.) / btScalar(60.)); virtual void debugDrawWorld(); - void setSolverCallback(btSolverCallback cb) - { - m_solverCallback = cb; - } - - virtual ~btDeformableMultiBodyDynamicsWorld(); - - virtual btMultiBodyDynamicsWorld* getMultiBodyDynamicsWorld() - { - return (btMultiBodyDynamicsWorld*)(this); - } - - virtual const btMultiBodyDynamicsWorld* getMultiBodyDynamicsWorld() const - { - return (const btMultiBodyDynamicsWorld*)(this); - } - - virtual btDynamicsWorldType getWorldType() const - { - return BT_DEFORMABLE_MULTIBODY_DYNAMICS_WORLD; - } - - virtual void predictUnconstraintMotion(btScalar timeStep); - - virtual void addSoftBody(btSoftBody* body, int collisionFilterGroup = btBroadphaseProxy::DefaultFilter, int collisionFilterMask = btBroadphaseProxy::AllFilter); - - btSoftBodyArray& getSoftBodyArray() - { - return m_softBodies; - } - - const btSoftBodyArray& getSoftBodyArray() const - { - return m_softBodies; - } - - btSoftBodyWorldInfo& getWorldInfo() - { - return m_sbi; - } - - const btSoftBodyWorldInfo& getWorldInfo() const - { - return m_sbi; - } - - void reinitialize(btScalar timeStep); - - void applyRigidBodyGravity(btScalar timeStep); - - void beforeSolverCallbacks(btScalar timeStep); - - void afterSolverCallbacks(btScalar timeStep); - - void addForce(btSoftBody* psb, btDeformableLagrangianForce* force); - - void removeForce(btSoftBody* psb, btDeformableLagrangianForce* force); - - void removeSoftBody(btSoftBody* body); - - void removeCollisionObject(btCollisionObject* collisionObject); - - int getDrawFlags() const { return (m_drawFlags); } - void setDrawFlags(int f) { m_drawFlags = f; } - - void setupConstraints(); - - void performDeformableCollisionDetection(); - - void solveMultiBodyConstraints(); - - void solveContactConstraints(); - - void sortConstraints(); - - void softBodySelfCollision(); - - void setImplicit(bool implicit) - { - m_implicit = implicit; - } - - void setLineSearch(bool lineSearch) - { - m_lineSearch = lineSearch; - } - - void applyRepulsionForce(btScalar timeStep); - - void performGeometricCollisions(btScalar timeStep); - - struct btDeformableSingleRayCallback : public btBroadphaseRayCallback - { - btVector3 m_rayFromWorld; - btVector3 m_rayToWorld; - btTransform m_rayFromTrans; - btTransform m_rayToTrans; - btVector3 m_hitNormal; - - const btDeformableMultiBodyDynamicsWorld* m_world; - btCollisionWorld::RayResultCallback& m_resultCallback; - - btDeformableSingleRayCallback(const btVector3& rayFromWorld, const btVector3& rayToWorld, const btDeformableMultiBodyDynamicsWorld* world, btCollisionWorld::RayResultCallback& resultCallback) - : m_rayFromWorld(rayFromWorld), - m_rayToWorld(rayToWorld), - m_world(world), - m_resultCallback(resultCallback) - { - m_rayFromTrans.setIdentity(); - m_rayFromTrans.setOrigin(m_rayFromWorld); - m_rayToTrans.setIdentity(); - m_rayToTrans.setOrigin(m_rayToWorld); - - btVector3 rayDir = (rayToWorld - rayFromWorld); - - rayDir.normalize(); - ///what about division by zero? --> just set rayDirection[i] to INF/1e30 - m_rayDirectionInverse[0] = rayDir[0] == btScalar(0.0) ? btScalar(1e30) : btScalar(1.0) / rayDir[0]; - m_rayDirectionInverse[1] = rayDir[1] == btScalar(0.0) ? btScalar(1e30) : btScalar(1.0) / rayDir[1]; - m_rayDirectionInverse[2] = rayDir[2] == btScalar(0.0) ? btScalar(1e30) : btScalar(1.0) / rayDir[2]; - m_signs[0] = m_rayDirectionInverse[0] < 0.0; - m_signs[1] = m_rayDirectionInverse[1] < 0.0; - m_signs[2] = m_rayDirectionInverse[2] < 0.0; - - m_lambda_max = rayDir.dot(m_rayToWorld - m_rayFromWorld); - } - - virtual bool process(const btBroadphaseProxy* proxy) - { - ///terminate further ray tests, once the closestHitFraction reached zero - if (m_resultCallback.m_closestHitFraction == btScalar(0.f)) - return false; - - btCollisionObject* collisionObject = (btCollisionObject*)proxy->m_clientObject; - - //only perform raycast if filterMask matches - if (m_resultCallback.needsCollision(collisionObject->getBroadphaseHandle())) - { - //RigidcollisionObject* collisionObject = ctrl->GetRigidcollisionObject(); - //btVector3 collisionObjectAabbMin,collisionObjectAabbMax; + void setSolverCallback(btSolverCallback cb) + { + m_solverCallback = cb; + } + + virtual ~btDeformableMultiBodyDynamicsWorld(); + + virtual btMultiBodyDynamicsWorld* getMultiBodyDynamicsWorld() + { + return (btMultiBodyDynamicsWorld*)(this); + } + + virtual const btMultiBodyDynamicsWorld* getMultiBodyDynamicsWorld() const + { + return (const btMultiBodyDynamicsWorld*)(this); + } + + virtual btDynamicsWorldType getWorldType() const + { + return BT_DEFORMABLE_MULTIBODY_DYNAMICS_WORLD; + } + + virtual void predictUnconstraintMotion(btScalar timeStep); + + virtual void addSoftBody(btSoftBody* body, int collisionFilterGroup = btBroadphaseProxy::DefaultFilter, int collisionFilterMask = btBroadphaseProxy::AllFilter); + + btSoftBodyArray& getSoftBodyArray() + { + return m_softBodies; + } + + const btSoftBodyArray& getSoftBodyArray() const + { + return m_softBodies; + } + + btSoftBodyWorldInfo& getWorldInfo() + { + return m_sbi; + } + + const btSoftBodyWorldInfo& getWorldInfo() const + { + return m_sbi; + } + + void reinitialize(btScalar timeStep); + + void applyRigidBodyGravity(btScalar timeStep); + + void beforeSolverCallbacks(btScalar timeStep); + + void afterSolverCallbacks(btScalar timeStep); + + void addForce(btSoftBody* psb, btDeformableLagrangianForce* force); + + void removeForce(btSoftBody* psb, btDeformableLagrangianForce* force); + + void removeSoftBodyForce(btSoftBody* psb); + + void removeSoftBody(btSoftBody* body); + + void removeCollisionObject(btCollisionObject* collisionObject); + + int getDrawFlags() const { return (m_drawFlags); } + void setDrawFlags(int f) { m_drawFlags = f; } + + void setupConstraints(); + + void performDeformableCollisionDetection(); + + void solveMultiBodyConstraints(); + + void solveContactConstraints(); + + void sortConstraints(); + + void softBodySelfCollision(); + + void setImplicit(bool implicit) + { + m_implicit = implicit; + } + + void setLineSearch(bool lineSearch) + { + m_lineSearch = lineSearch; + } + + void setUseProjection(bool useProjection) + { + m_useProjection = useProjection; + } + + void applyRepulsionForce(btScalar timeStep); + + void performGeometricCollisions(btScalar timeStep); + + struct btDeformableSingleRayCallback : public btBroadphaseRayCallback + { + btVector3 m_rayFromWorld; + btVector3 m_rayToWorld; + btTransform m_rayFromTrans; + btTransform m_rayToTrans; + btVector3 m_hitNormal; + + const btDeformableMultiBodyDynamicsWorld* m_world; + btCollisionWorld::RayResultCallback& m_resultCallback; + + btDeformableSingleRayCallback(const btVector3& rayFromWorld, const btVector3& rayToWorld, const btDeformableMultiBodyDynamicsWorld* world, btCollisionWorld::RayResultCallback& resultCallback) + : m_rayFromWorld(rayFromWorld), + m_rayToWorld(rayToWorld), + m_world(world), + m_resultCallback(resultCallback) + { + m_rayFromTrans.setIdentity(); + m_rayFromTrans.setOrigin(m_rayFromWorld); + m_rayToTrans.setIdentity(); + m_rayToTrans.setOrigin(m_rayToWorld); + + btVector3 rayDir = (rayToWorld - rayFromWorld); + + rayDir.normalize(); + ///what about division by zero? --> just set rayDirection[i] to INF/1e30 + m_rayDirectionInverse[0] = rayDir[0] == btScalar(0.0) ? btScalar(1e30) : btScalar(1.0) / rayDir[0]; + m_rayDirectionInverse[1] = rayDir[1] == btScalar(0.0) ? btScalar(1e30) : btScalar(1.0) / rayDir[1]; + m_rayDirectionInverse[2] = rayDir[2] == btScalar(0.0) ? btScalar(1e30) : btScalar(1.0) / rayDir[2]; + m_signs[0] = m_rayDirectionInverse[0] < 0.0; + m_signs[1] = m_rayDirectionInverse[1] < 0.0; + m_signs[2] = m_rayDirectionInverse[2] < 0.0; + + m_lambda_max = rayDir.dot(m_rayToWorld - m_rayFromWorld); + } + + virtual bool process(const btBroadphaseProxy* proxy) + { + ///terminate further ray tests, once the closestHitFraction reached zero + if (m_resultCallback.m_closestHitFraction == btScalar(0.f)) + return false; + + btCollisionObject* collisionObject = (btCollisionObject*)proxy->m_clientObject; + + //only perform raycast if filterMask matches + if (m_resultCallback.needsCollision(collisionObject->getBroadphaseHandle())) + { + //RigidcollisionObject* collisionObject = ctrl->GetRigidcollisionObject(); + //btVector3 collisionObjectAabbMin,collisionObjectAabbMax; #if 0 #ifdef RECALCULATE_AABB btVector3 collisionObjectAabbMin,collisionObjectAabbMax; @@ -225,87 +232,85 @@ public: const btVector3& collisionObjectAabbMax = collisionObject->getBroadphaseHandle()->m_aabbMax; #endif #endif - //btScalar hitLambda = m_resultCallback.m_closestHitFraction; - //culling already done by broadphase - //if (btRayAabb(m_rayFromWorld,m_rayToWorld,collisionObjectAabbMin,collisionObjectAabbMax,hitLambda,m_hitNormal)) - { - m_world->rayTestSingle(m_rayFromTrans, m_rayToTrans, - collisionObject, - collisionObject->getCollisionShape(), - collisionObject->getWorldTransform(), - m_resultCallback); - } - } - return true; - } - }; - - - - void rayTest(const btVector3& rayFromWorld, const btVector3& rayToWorld, RayResultCallback& resultCallback) const - { - BT_PROFILE("rayTest"); - /// use the broadphase to accelerate the search for objects, based on their aabb - /// and for each object with ray-aabb overlap, perform an exact ray test - btDeformableSingleRayCallback rayCB(rayFromWorld, rayToWorld, this, resultCallback); - + //btScalar hitLambda = m_resultCallback.m_closestHitFraction; + //culling already done by broadphase + //if (btRayAabb(m_rayFromWorld,m_rayToWorld,collisionObjectAabbMin,collisionObjectAabbMax,hitLambda,m_hitNormal)) + { + m_world->rayTestSingle(m_rayFromTrans, m_rayToTrans, + collisionObject, + collisionObject->getCollisionShape(), + collisionObject->getWorldTransform(), + m_resultCallback); + } + } + return true; + } + }; + + void rayTest(const btVector3& rayFromWorld, const btVector3& rayToWorld, RayResultCallback& resultCallback) const + { + BT_PROFILE("rayTest"); + /// use the broadphase to accelerate the search for objects, based on their aabb + /// and for each object with ray-aabb overlap, perform an exact ray test + btDeformableSingleRayCallback rayCB(rayFromWorld, rayToWorld, this, resultCallback); + #ifndef USE_BRUTEFORCE_RAYBROADPHASE - m_broadphasePairCache->rayTest(rayFromWorld, rayToWorld, rayCB); + m_broadphasePairCache->rayTest(rayFromWorld, rayToWorld, rayCB); #else - for (int i = 0; i < this->getNumCollisionObjects(); i++) - { - rayCB.process(m_collisionObjects[i]->getBroadphaseHandle()); - } + for (int i = 0; i < this->getNumCollisionObjects(); i++) + { + rayCB.process(m_collisionObjects[i]->getBroadphaseHandle()); + } #endif //USE_BRUTEFORCE_RAYBROADPHASE - } - - void rayTestSingle(const btTransform& rayFromTrans, const btTransform& rayToTrans, - btCollisionObject* collisionObject, - const btCollisionShape* collisionShape, - const btTransform& colObjWorldTransform, - RayResultCallback& resultCallback) const - { - if (collisionShape->isSoftBody()) - { - btSoftBody* softBody = btSoftBody::upcast(collisionObject); - if (softBody) - { - btSoftBody::sRayCast softResult; - if (softBody->rayFaceTest(rayFromTrans.getOrigin(), rayToTrans.getOrigin(), softResult)) - { - if (softResult.fraction <= resultCallback.m_closestHitFraction) - { - btCollisionWorld::LocalShapeInfo shapeInfo; - shapeInfo.m_shapePart = 0; - shapeInfo.m_triangleIndex = softResult.index; - // get the normal - btVector3 rayDir = rayToTrans.getOrigin() - rayFromTrans.getOrigin(); - btVector3 normal = -rayDir; - normal.normalize(); - { - normal = softBody->m_faces[softResult.index].m_normal; - if (normal.dot(rayDir) > 0) - { - // normal always point toward origin of the ray - normal = -normal; - } - } - - btCollisionWorld::LocalRayResult rayResult(collisionObject, - &shapeInfo, - normal, - softResult.fraction); - bool normalInWorldSpace = true; - resultCallback.addSingleResult(rayResult, normalInWorldSpace); - } - } - } - } - else - { - btCollisionWorld::rayTestSingle(rayFromTrans, rayToTrans, collisionObject, collisionShape, colObjWorldTransform, resultCallback); - } - } + } + + void rayTestSingle(const btTransform& rayFromTrans, const btTransform& rayToTrans, + btCollisionObject* collisionObject, + const btCollisionShape* collisionShape, + const btTransform& colObjWorldTransform, + RayResultCallback& resultCallback) const + { + if (collisionShape->isSoftBody()) + { + btSoftBody* softBody = btSoftBody::upcast(collisionObject); + if (softBody) + { + btSoftBody::sRayCast softResult; + if (softBody->rayFaceTest(rayFromTrans.getOrigin(), rayToTrans.getOrigin(), softResult)) + { + if (softResult.fraction <= resultCallback.m_closestHitFraction) + { + btCollisionWorld::LocalShapeInfo shapeInfo; + shapeInfo.m_shapePart = 0; + shapeInfo.m_triangleIndex = softResult.index; + // get the normal + btVector3 rayDir = rayToTrans.getOrigin() - rayFromTrans.getOrigin(); + btVector3 normal = -rayDir; + normal.normalize(); + { + normal = softBody->m_faces[softResult.index].m_normal; + if (normal.dot(rayDir) > 0) + { + // normal always point toward origin of the ray + normal = -normal; + } + } + + btCollisionWorld::LocalRayResult rayResult(collisionObject, + &shapeInfo, + normal, + softResult.fraction); + bool normalInWorldSpace = true; + resultCallback.addSingleResult(rayResult, normalInWorldSpace); + } + } + } + } + else + { + btCollisionWorld::rayTestSingle(rayFromTrans, rayToTrans, collisionObject, collisionShape, colObjWorldTransform, resultCallback); + } + } }; #endif //BT_DEFORMABLE_MULTIBODY_DYNAMICS_WORLD_H diff --git a/thirdparty/bullet/BulletSoftBody/btDeformableNeoHookeanForce.h b/thirdparty/bullet/BulletSoftBody/btDeformableNeoHookeanForce.h index d89bc4aca4..60798c5bcd 100644 --- a/thirdparty/bullet/BulletSoftBody/btDeformableNeoHookeanForce.h +++ b/thirdparty/bullet/BulletSoftBody/btDeformableNeoHookeanForce.h @@ -23,30 +23,30 @@ subject to the following restrictions: class btDeformableNeoHookeanForce : public btDeformableLagrangianForce { public: - typedef btAlignedObjectArray<btVector3> TVStack; - btScalar m_mu, m_lambda; // Lame Parameters - btScalar m_E, m_nu; // Young's modulus and Poisson ratio - btScalar m_mu_damp, m_lambda_damp; - btDeformableNeoHookeanForce(): m_mu(1), m_lambda(1) - { - btScalar damping = 0.05; - m_mu_damp = damping * m_mu; - m_lambda_damp = damping * m_lambda; + typedef btAlignedObjectArray<btVector3> TVStack; + btScalar m_mu, m_lambda; // Lame Parameters + btScalar m_E, m_nu; // Young's modulus and Poisson ratio + btScalar m_mu_damp, m_lambda_damp; + btDeformableNeoHookeanForce() : m_mu(1), m_lambda(1) + { + btScalar damping = 0.05; + m_mu_damp = damping * m_mu; + m_lambda_damp = damping * m_lambda; updateYoungsModulusAndPoissonRatio(); - } - - btDeformableNeoHookeanForce(btScalar mu, btScalar lambda, btScalar damping = 0.05): m_mu(mu), m_lambda(lambda) - { - m_mu_damp = damping * m_mu; - m_lambda_damp = damping * m_lambda; + } + + btDeformableNeoHookeanForce(btScalar mu, btScalar lambda, btScalar damping = 0.05) : m_mu(mu), m_lambda(lambda) + { + m_mu_damp = damping * m_mu; + m_lambda_damp = damping * m_lambda; updateYoungsModulusAndPoissonRatio(); - } + } void updateYoungsModulusAndPoissonRatio() { // conversion from Lame Parameters to Young's modulus and Poisson ratio // https://en.wikipedia.org/wiki/Lam%C3%A9_parameters - m_E = m_mu * (3*m_lambda + 2*m_mu)/(m_lambda + m_mu); + m_E = m_mu * (3 * m_lambda + 2 * m_mu) / (m_lambda + m_mu); m_nu = m_lambda * 0.5 / (m_mu + m_lambda); } @@ -55,21 +55,21 @@ public: // conversion from Young's modulus and Poisson ratio to Lame Parameters // https://en.wikipedia.org/wiki/Lam%C3%A9_parameters m_mu = m_E * 0.5 / (1 + m_nu); - m_lambda = m_E * m_nu / ((1 + m_nu) * (1- 2*m_nu)); + m_lambda = m_E * m_nu / ((1 + m_nu) * (1 - 2 * m_nu)); } - void setYoungsModulus(btScalar E) - { + void setYoungsModulus(btScalar E) + { m_E = E; updateLameParameters(); - } + } void setPoissonRatio(btScalar nu) { m_nu = nu; updateLameParameters(); } - + void setDamping(btScalar damping) { m_mu_damp = damping * m_mu; @@ -83,339 +83,338 @@ public: updateYoungsModulusAndPoissonRatio(); } - virtual void addScaledForces(btScalar scale, TVStack& force) - { - addScaledDampingForce(scale, force); - addScaledElasticForce(scale, force); - } - - virtual void addScaledExplicitForce(btScalar scale, TVStack& force) - { - addScaledElasticForce(scale, force); - } - - // The damping matrix is calculated using the time n state as described in https://www.math.ucla.edu/~jteran/papers/GSSJT15.pdf to allow line search - virtual void addScaledDampingForce(btScalar scale, TVStack& force) - { - if (m_mu_damp == 0 && m_lambda_damp == 0) - return; - int numNodes = getNumNodes(); - btAssert(numNodes <= force.size()); - btVector3 grad_N_hat_1st_col = btVector3(-1,-1,-1); - for (int i = 0; i < m_softBodies.size(); ++i) - { - btSoftBody* psb = m_softBodies[i]; - if (!psb->isActive()) - { - continue; - } - for (int j = 0; j < psb->m_tetras.size(); ++j) - { - btSoftBody::Tetra& tetra = psb->m_tetras[j]; - btSoftBody::Node* node0 = tetra.m_n[0]; - btSoftBody::Node* node1 = tetra.m_n[1]; - btSoftBody::Node* node2 = tetra.m_n[2]; - btSoftBody::Node* node3 = tetra.m_n[3]; - size_t id0 = node0->index; - size_t id1 = node1->index; - size_t id2 = node2->index; - size_t id3 = node3->index; - btMatrix3x3 dF = DsFromVelocity(node0, node1, node2, node3) * tetra.m_Dm_inverse; - btMatrix3x3 I; - I.setIdentity(); - btMatrix3x3 dP = (dF + dF.transpose()) * m_mu_damp + I * (dF[0][0]+dF[1][1]+dF[2][2]) * m_lambda_damp; -// firstPiolaDampingDifferential(psb->m_tetraScratchesTn[j], dF, dP); - btVector3 df_on_node0 = dP * (tetra.m_Dm_inverse.transpose()*grad_N_hat_1st_col); - btMatrix3x3 df_on_node123 = dP * tetra.m_Dm_inverse.transpose(); + virtual void addScaledForces(btScalar scale, TVStack& force) + { + addScaledDampingForce(scale, force); + addScaledElasticForce(scale, force); + } + + virtual void addScaledExplicitForce(btScalar scale, TVStack& force) + { + addScaledElasticForce(scale, force); + } + + // The damping matrix is calculated using the time n state as described in https://www.math.ucla.edu/~jteran/papers/GSSJT15.pdf to allow line search + virtual void addScaledDampingForce(btScalar scale, TVStack& force) + { + if (m_mu_damp == 0 && m_lambda_damp == 0) + return; + int numNodes = getNumNodes(); + btAssert(numNodes <= force.size()); + btVector3 grad_N_hat_1st_col = btVector3(-1, -1, -1); + for (int i = 0; i < m_softBodies.size(); ++i) + { + btSoftBody* psb = m_softBodies[i]; + if (!psb->isActive()) + { + continue; + } + for (int j = 0; j < psb->m_tetras.size(); ++j) + { + btSoftBody::Tetra& tetra = psb->m_tetras[j]; + btSoftBody::Node* node0 = tetra.m_n[0]; + btSoftBody::Node* node1 = tetra.m_n[1]; + btSoftBody::Node* node2 = tetra.m_n[2]; + btSoftBody::Node* node3 = tetra.m_n[3]; + size_t id0 = node0->index; + size_t id1 = node1->index; + size_t id2 = node2->index; + size_t id3 = node3->index; + btMatrix3x3 dF = DsFromVelocity(node0, node1, node2, node3) * tetra.m_Dm_inverse; + btMatrix3x3 I; + I.setIdentity(); + btMatrix3x3 dP = (dF + dF.transpose()) * m_mu_damp + I * (dF[0][0] + dF[1][1] + dF[2][2]) * m_lambda_damp; + // firstPiolaDampingDifferential(psb->m_tetraScratchesTn[j], dF, dP); + btVector3 df_on_node0 = dP * (tetra.m_Dm_inverse.transpose() * grad_N_hat_1st_col); + btMatrix3x3 df_on_node123 = dP * tetra.m_Dm_inverse.transpose(); + + // damping force differential + btScalar scale1 = scale * tetra.m_element_measure; + force[id0] -= scale1 * df_on_node0; + force[id1] -= scale1 * df_on_node123.getColumn(0); + force[id2] -= scale1 * df_on_node123.getColumn(1); + force[id3] -= scale1 * df_on_node123.getColumn(2); + } + } + } + + virtual double totalElasticEnergy(btScalar dt) + { + double energy = 0; + for (int i = 0; i < m_softBodies.size(); ++i) + { + btSoftBody* psb = m_softBodies[i]; + if (!psb->isActive()) + { + continue; + } + for (int j = 0; j < psb->m_tetraScratches.size(); ++j) + { + btSoftBody::Tetra& tetra = psb->m_tetras[j]; + btSoftBody::TetraScratch& s = psb->m_tetraScratches[j]; + energy += tetra.m_element_measure * elasticEnergyDensity(s); + } + } + return energy; + } + + // The damping energy is formulated as in https://www.math.ucla.edu/~jteran/papers/GSSJT15.pdf to allow line search + virtual double totalDampingEnergy(btScalar dt) + { + double energy = 0; + int sz = 0; + for (int i = 0; i < m_softBodies.size(); ++i) + { + btSoftBody* psb = m_softBodies[i]; + if (!psb->isActive()) + { + continue; + } + for (int j = 0; j < psb->m_nodes.size(); ++j) + { + sz = btMax(sz, psb->m_nodes[j].index); + } + } + TVStack dampingForce; + dampingForce.resize(sz + 1); + for (int i = 0; i < dampingForce.size(); ++i) + dampingForce[i].setZero(); + addScaledDampingForce(0.5, dampingForce); + for (int i = 0; i < m_softBodies.size(); ++i) + { + btSoftBody* psb = m_softBodies[i]; + for (int j = 0; j < psb->m_nodes.size(); ++j) + { + const btSoftBody::Node& node = psb->m_nodes[j]; + energy -= dampingForce[node.index].dot(node.m_v) / dt; + } + } + return energy; + } + + double elasticEnergyDensity(const btSoftBody::TetraScratch& s) + { + double density = 0; + density += m_mu * 0.5 * (s.m_trace - 3.); + density += m_lambda * 0.5 * (s.m_J - 1. - 0.75 * m_mu / m_lambda) * (s.m_J - 1. - 0.75 * m_mu / m_lambda); + density -= m_mu * 0.5 * log(s.m_trace + 1); + return density; + } - // damping force differential - btScalar scale1 = scale * tetra.m_element_measure; - force[id0] -= scale1 * df_on_node0; - force[id1] -= scale1 * df_on_node123.getColumn(0); - force[id2] -= scale1 * df_on_node123.getColumn(1); - force[id3] -= scale1 * df_on_node123.getColumn(2); - } - } - } - - virtual double totalElasticEnergy(btScalar dt) - { - double energy = 0; - for (int i = 0; i < m_softBodies.size(); ++i) - { - btSoftBody* psb = m_softBodies[i]; - if (!psb->isActive()) - { - continue; - } - for (int j = 0; j < psb->m_tetraScratches.size(); ++j) - { - btSoftBody::Tetra& tetra = psb->m_tetras[j]; - btSoftBody::TetraScratch& s = psb->m_tetraScratches[j]; - energy += tetra.m_element_measure * elasticEnergyDensity(s); - } - } - return energy; - } - - // The damping energy is formulated as in https://www.math.ucla.edu/~jteran/papers/GSSJT15.pdf to allow line search - virtual double totalDampingEnergy(btScalar dt) - { - double energy = 0; - int sz = 0; - for (int i = 0; i < m_softBodies.size(); ++i) - { - btSoftBody* psb = m_softBodies[i]; - if (!psb->isActive()) - { - continue; - } - for (int j = 0; j < psb->m_nodes.size(); ++j) - { - sz = btMax(sz, psb->m_nodes[j].index); - } - } - TVStack dampingForce; - dampingForce.resize(sz+1); - for (int i = 0; i < dampingForce.size(); ++i) - dampingForce[i].setZero(); - addScaledDampingForce(0.5, dampingForce); - for (int i = 0; i < m_softBodies.size(); ++i) - { - btSoftBody* psb = m_softBodies[i]; - for (int j = 0; j < psb->m_nodes.size(); ++j) - { - const btSoftBody::Node& node = psb->m_nodes[j]; - energy -= dampingForce[node.index].dot(node.m_v) / dt; - } - } - return energy; - } - - double elasticEnergyDensity(const btSoftBody::TetraScratch& s) - { - double density = 0; - density += m_mu * 0.5 * (s.m_trace - 3.); - density += m_lambda * 0.5 * (s.m_J - 1. - 0.75 * m_mu / m_lambda)* (s.m_J - 1. - 0.75 * m_mu / m_lambda); - density -= m_mu * 0.5 * log(s.m_trace+1); - return density; - } - - virtual void addScaledElasticForce(btScalar scale, TVStack& force) - { - int numNodes = getNumNodes(); - btAssert(numNodes <= force.size()); - btVector3 grad_N_hat_1st_col = btVector3(-1,-1,-1); - for (int i = 0; i < m_softBodies.size(); ++i) - { - btSoftBody* psb = m_softBodies[i]; - if (!psb->isActive()) - { - continue; - } - btScalar max_p = psb->m_cfg.m_maxStress; - for (int j = 0; j < psb->m_tetras.size(); ++j) - { - btSoftBody::Tetra& tetra = psb->m_tetras[j]; - btMatrix3x3 P; - firstPiola(psb->m_tetraScratches[j],P); + virtual void addScaledElasticForce(btScalar scale, TVStack& force) + { + int numNodes = getNumNodes(); + btAssert(numNodes <= force.size()); + btVector3 grad_N_hat_1st_col = btVector3(-1, -1, -1); + for (int i = 0; i < m_softBodies.size(); ++i) + { + btSoftBody* psb = m_softBodies[i]; + if (!psb->isActive()) + { + continue; + } + btScalar max_p = psb->m_cfg.m_maxStress; + for (int j = 0; j < psb->m_tetras.size(); ++j) + { + btSoftBody::Tetra& tetra = psb->m_tetras[j]; + btMatrix3x3 P; + firstPiola(psb->m_tetraScratches[j], P); #ifdef USE_SVD - if (max_p > 0) - { - // since we want to clamp the principal stress to max_p, we only need to - // calculate SVD when sigma_0^2 + sigma_1^2 + sigma_2^2 > max_p * max_p - btScalar trPTP = (P[0].length2() + P[1].length2() + P[2].length2()); - if (trPTP > max_p * max_p) - { - btMatrix3x3 U, V; - btVector3 sigma; - singularValueDecomposition(P, U, sigma, V); - sigma[0] = btMin(sigma[0], max_p); - sigma[1] = btMin(sigma[1], max_p); - sigma[2] = btMin(sigma[2], max_p); - sigma[0] = btMax(sigma[0], -max_p); - sigma[1] = btMax(sigma[1], -max_p); - sigma[2] = btMax(sigma[2], -max_p); - btMatrix3x3 Sigma; - Sigma.setIdentity(); - Sigma[0][0] = sigma[0]; - Sigma[1][1] = sigma[1]; - Sigma[2][2] = sigma[2]; - P = U * Sigma * V.transpose(); - } - } + if (max_p > 0) + { + // since we want to clamp the principal stress to max_p, we only need to + // calculate SVD when sigma_0^2 + sigma_1^2 + sigma_2^2 > max_p * max_p + btScalar trPTP = (P[0].length2() + P[1].length2() + P[2].length2()); + if (trPTP > max_p * max_p) + { + btMatrix3x3 U, V; + btVector3 sigma; + singularValueDecomposition(P, U, sigma, V); + sigma[0] = btMin(sigma[0], max_p); + sigma[1] = btMin(sigma[1], max_p); + sigma[2] = btMin(sigma[2], max_p); + sigma[0] = btMax(sigma[0], -max_p); + sigma[1] = btMax(sigma[1], -max_p); + sigma[2] = btMax(sigma[2], -max_p); + btMatrix3x3 Sigma; + Sigma.setIdentity(); + Sigma[0][0] = sigma[0]; + Sigma[1][1] = sigma[1]; + Sigma[2][2] = sigma[2]; + P = U * Sigma * V.transpose(); + } + } #endif -// btVector3 force_on_node0 = P * (tetra.m_Dm_inverse.transpose()*grad_N_hat_1st_col); - btMatrix3x3 force_on_node123 = P * tetra.m_Dm_inverse.transpose(); - btVector3 force_on_node0 = force_on_node123 * grad_N_hat_1st_col; - - btSoftBody::Node* node0 = tetra.m_n[0]; - btSoftBody::Node* node1 = tetra.m_n[1]; - btSoftBody::Node* node2 = tetra.m_n[2]; - btSoftBody::Node* node3 = tetra.m_n[3]; - size_t id0 = node0->index; - size_t id1 = node1->index; - size_t id2 = node2->index; - size_t id3 = node3->index; - - // elastic force - btScalar scale1 = scale * tetra.m_element_measure; - force[id0] -= scale1 * force_on_node0; - force[id1] -= scale1 * force_on_node123.getColumn(0); - force[id2] -= scale1 * force_on_node123.getColumn(1); - force[id3] -= scale1 * force_on_node123.getColumn(2); - } - } - } - - // The damping matrix is calculated using the time n state as described in https://www.math.ucla.edu/~jteran/papers/GSSJT15.pdf to allow line search - virtual void addScaledDampingForceDifferential(btScalar scale, const TVStack& dv, TVStack& df) - { - if (m_mu_damp == 0 && m_lambda_damp == 0) - return; - int numNodes = getNumNodes(); - btAssert(numNodes <= df.size()); - btVector3 grad_N_hat_1st_col = btVector3(-1,-1,-1); - for (int i = 0; i < m_softBodies.size(); ++i) - { - btSoftBody* psb = m_softBodies[i]; - if (!psb->isActive()) - { - continue; - } - for (int j = 0; j < psb->m_tetras.size(); ++j) - { - btSoftBody::Tetra& tetra = psb->m_tetras[j]; - btSoftBody::Node* node0 = tetra.m_n[0]; - btSoftBody::Node* node1 = tetra.m_n[1]; - btSoftBody::Node* node2 = tetra.m_n[2]; - btSoftBody::Node* node3 = tetra.m_n[3]; - size_t id0 = node0->index; - size_t id1 = node1->index; - size_t id2 = node2->index; - size_t id3 = node3->index; - btMatrix3x3 dF = Ds(id0, id1, id2, id3, dv) * tetra.m_Dm_inverse; - btMatrix3x3 I; - I.setIdentity(); - btMatrix3x3 dP = (dF + dF.transpose()) * m_mu_damp + I * (dF[0][0]+dF[1][1]+dF[2][2]) * m_lambda_damp; -// firstPiolaDampingDifferential(psb->m_tetraScratchesTn[j], dF, dP); -// btVector3 df_on_node0 = dP * (tetra.m_Dm_inverse.transpose()*grad_N_hat_1st_col); - btMatrix3x3 df_on_node123 = dP * tetra.m_Dm_inverse.transpose(); - btVector3 df_on_node0 = df_on_node123 * grad_N_hat_1st_col; + // btVector3 force_on_node0 = P * (tetra.m_Dm_inverse.transpose()*grad_N_hat_1st_col); + btMatrix3x3 force_on_node123 = P * tetra.m_Dm_inverse.transpose(); + btVector3 force_on_node0 = force_on_node123 * grad_N_hat_1st_col; + + btSoftBody::Node* node0 = tetra.m_n[0]; + btSoftBody::Node* node1 = tetra.m_n[1]; + btSoftBody::Node* node2 = tetra.m_n[2]; + btSoftBody::Node* node3 = tetra.m_n[3]; + size_t id0 = node0->index; + size_t id1 = node1->index; + size_t id2 = node2->index; + size_t id3 = node3->index; + + // elastic force + btScalar scale1 = scale * tetra.m_element_measure; + force[id0] -= scale1 * force_on_node0; + force[id1] -= scale1 * force_on_node123.getColumn(0); + force[id2] -= scale1 * force_on_node123.getColumn(1); + force[id3] -= scale1 * force_on_node123.getColumn(2); + } + } + } + + // The damping matrix is calculated using the time n state as described in https://www.math.ucla.edu/~jteran/papers/GSSJT15.pdf to allow line search + virtual void addScaledDampingForceDifferential(btScalar scale, const TVStack& dv, TVStack& df) + { + if (m_mu_damp == 0 && m_lambda_damp == 0) + return; + int numNodes = getNumNodes(); + btAssert(numNodes <= df.size()); + btVector3 grad_N_hat_1st_col = btVector3(-1, -1, -1); + for (int i = 0; i < m_softBodies.size(); ++i) + { + btSoftBody* psb = m_softBodies[i]; + if (!psb->isActive()) + { + continue; + } + for (int j = 0; j < psb->m_tetras.size(); ++j) + { + btSoftBody::Tetra& tetra = psb->m_tetras[j]; + btSoftBody::Node* node0 = tetra.m_n[0]; + btSoftBody::Node* node1 = tetra.m_n[1]; + btSoftBody::Node* node2 = tetra.m_n[2]; + btSoftBody::Node* node3 = tetra.m_n[3]; + size_t id0 = node0->index; + size_t id1 = node1->index; + size_t id2 = node2->index; + size_t id3 = node3->index; + btMatrix3x3 dF = Ds(id0, id1, id2, id3, dv) * tetra.m_Dm_inverse; + btMatrix3x3 I; + I.setIdentity(); + btMatrix3x3 dP = (dF + dF.transpose()) * m_mu_damp + I * (dF[0][0] + dF[1][1] + dF[2][2]) * m_lambda_damp; + // firstPiolaDampingDifferential(psb->m_tetraScratchesTn[j], dF, dP); + // btVector3 df_on_node0 = dP * (tetra.m_Dm_inverse.transpose()*grad_N_hat_1st_col); + btMatrix3x3 df_on_node123 = dP * tetra.m_Dm_inverse.transpose(); + btVector3 df_on_node0 = df_on_node123 * grad_N_hat_1st_col; + + // damping force differential + btScalar scale1 = scale * tetra.m_element_measure; + df[id0] -= scale1 * df_on_node0; + df[id1] -= scale1 * df_on_node123.getColumn(0); + df[id2] -= scale1 * df_on_node123.getColumn(1); + df[id3] -= scale1 * df_on_node123.getColumn(2); + } + } + } + + virtual void buildDampingForceDifferentialDiagonal(btScalar scale, TVStack& diagA) {} + + virtual void addScaledElasticForceDifferential(btScalar scale, const TVStack& dx, TVStack& df) + { + int numNodes = getNumNodes(); + btAssert(numNodes <= df.size()); + btVector3 grad_N_hat_1st_col = btVector3(-1, -1, -1); + for (int i = 0; i < m_softBodies.size(); ++i) + { + btSoftBody* psb = m_softBodies[i]; + if (!psb->isActive()) + { + continue; + } + for (int j = 0; j < psb->m_tetras.size(); ++j) + { + btSoftBody::Tetra& tetra = psb->m_tetras[j]; + btSoftBody::Node* node0 = tetra.m_n[0]; + btSoftBody::Node* node1 = tetra.m_n[1]; + btSoftBody::Node* node2 = tetra.m_n[2]; + btSoftBody::Node* node3 = tetra.m_n[3]; + size_t id0 = node0->index; + size_t id1 = node1->index; + size_t id2 = node2->index; + size_t id3 = node3->index; + btMatrix3x3 dF = Ds(id0, id1, id2, id3, dx) * tetra.m_Dm_inverse; + btMatrix3x3 dP; + firstPiolaDifferential(psb->m_tetraScratches[j], dF, dP); + // btVector3 df_on_node0 = dP * (tetra.m_Dm_inverse.transpose()*grad_N_hat_1st_col); + btMatrix3x3 df_on_node123 = dP * tetra.m_Dm_inverse.transpose(); + btVector3 df_on_node0 = df_on_node123 * grad_N_hat_1st_col; + + // elastic force differential + btScalar scale1 = scale * tetra.m_element_measure; + df[id0] -= scale1 * df_on_node0; + df[id1] -= scale1 * df_on_node123.getColumn(0); + df[id2] -= scale1 * df_on_node123.getColumn(1); + df[id3] -= scale1 * df_on_node123.getColumn(2); + } + } + } + + void firstPiola(const btSoftBody::TetraScratch& s, btMatrix3x3& P) + { + btScalar c1 = (m_mu * (1. - 1. / (s.m_trace + 1.))); + btScalar c2 = (m_lambda * (s.m_J - 1.) - 0.75 * m_mu); + P = s.m_F * c1 + s.m_cofF * c2; + } + + // Let P be the first piola stress. + // This function calculates the dP = dP/dF * dF + void firstPiolaDifferential(const btSoftBody::TetraScratch& s, const btMatrix3x3& dF, btMatrix3x3& dP) + { + btScalar c1 = m_mu * (1. - 1. / (s.m_trace + 1.)); + btScalar c2 = (2. * m_mu) * DotProduct(s.m_F, dF) * (1. / ((1. + s.m_trace) * (1. + s.m_trace))); + btScalar c3 = (m_lambda * DotProduct(s.m_cofF, dF)); + dP = dF * c1 + s.m_F * c2; + addScaledCofactorMatrixDifferential(s.m_F, dF, m_lambda * (s.m_J - 1.) - 0.75 * m_mu, dP); + dP += s.m_cofF * c3; + } - // damping force differential - btScalar scale1 = scale * tetra.m_element_measure; - df[id0] -= scale1 * df_on_node0; - df[id1] -= scale1 * df_on_node123.getColumn(0); - df[id2] -= scale1 * df_on_node123.getColumn(1); - df[id3] -= scale1 * df_on_node123.getColumn(2); - } - } - } - - virtual void buildDampingForceDifferentialDiagonal(btScalar scale, TVStack& diagA){} - - virtual void addScaledElasticForceDifferential(btScalar scale, const TVStack& dx, TVStack& df) - { - int numNodes = getNumNodes(); - btAssert(numNodes <= df.size()); - btVector3 grad_N_hat_1st_col = btVector3(-1,-1,-1); - for (int i = 0; i < m_softBodies.size(); ++i) - { - btSoftBody* psb = m_softBodies[i]; - if (!psb->isActive()) - { - continue; - } - for (int j = 0; j < psb->m_tetras.size(); ++j) - { - btSoftBody::Tetra& tetra = psb->m_tetras[j]; - btSoftBody::Node* node0 = tetra.m_n[0]; - btSoftBody::Node* node1 = tetra.m_n[1]; - btSoftBody::Node* node2 = tetra.m_n[2]; - btSoftBody::Node* node3 = tetra.m_n[3]; - size_t id0 = node0->index; - size_t id1 = node1->index; - size_t id2 = node2->index; - size_t id3 = node3->index; - btMatrix3x3 dF = Ds(id0, id1, id2, id3, dx) * tetra.m_Dm_inverse; - btMatrix3x3 dP; - firstPiolaDifferential(psb->m_tetraScratches[j], dF, dP); -// btVector3 df_on_node0 = dP * (tetra.m_Dm_inverse.transpose()*grad_N_hat_1st_col); - btMatrix3x3 df_on_node123 = dP * tetra.m_Dm_inverse.transpose(); - btVector3 df_on_node0 = df_on_node123 * grad_N_hat_1st_col; - - // elastic force differential - btScalar scale1 = scale * tetra.m_element_measure; - df[id0] -= scale1 * df_on_node0; - df[id1] -= scale1 * df_on_node123.getColumn(0); - df[id2] -= scale1 * df_on_node123.getColumn(1); - df[id3] -= scale1 * df_on_node123.getColumn(2); - } - } - } - - void firstPiola(const btSoftBody::TetraScratch& s, btMatrix3x3& P) - { - btScalar c1 = (m_mu * ( 1. - 1. / (s.m_trace + 1.))); - btScalar c2 = (m_lambda * (s.m_J - 1.) - 0.75 * m_mu); - P = s.m_F * c1 + s.m_cofF * c2; - } - - // Let P be the first piola stress. - // This function calculates the dP = dP/dF * dF - void firstPiolaDifferential(const btSoftBody::TetraScratch& s, const btMatrix3x3& dF, btMatrix3x3& dP) - { - btScalar c1 = m_mu * ( 1. - 1. / (s.m_trace + 1.)); - btScalar c2 = (2.*m_mu) * DotProduct(s.m_F, dF) * (1./((1.+s.m_trace)*(1.+s.m_trace))); - btScalar c3 = (m_lambda * DotProduct(s.m_cofF, dF)); - dP = dF * c1 + s.m_F * c2; - addScaledCofactorMatrixDifferential(s.m_F, dF, m_lambda*(s.m_J-1.) - 0.75*m_mu, dP); - dP += s.m_cofF * c3; - } - - // Let Q be the damping stress. - // This function calculates the dP = dQ/dF * dF - void firstPiolaDampingDifferential(const btSoftBody::TetraScratch& s, const btMatrix3x3& dF, btMatrix3x3& dP) - { - btScalar c1 = (m_mu_damp * ( 1. - 1. / (s.m_trace + 1.))); - btScalar c2 = ((2.*m_mu_damp) * DotProduct(s.m_F, dF) *(1./((1.+s.m_trace)*(1.+s.m_trace)))); - btScalar c3 = (m_lambda_damp * DotProduct(s.m_cofF, dF)); - dP = dF * c1 + s.m_F * c2; - addScaledCofactorMatrixDifferential(s.m_F, dF, m_lambda_damp*(s.m_J-1.) - 0.75*m_mu_damp, dP); - dP += s.m_cofF * c3; - } - - btScalar DotProduct(const btMatrix3x3& A, const btMatrix3x3& B) - { - btScalar ans = 0; - for (int i = 0; i < 3; ++i) - { - ans += A[i].dot(B[i]); - } - return ans; - } - - // Let C(A) be the cofactor of the matrix A - // Let H = the derivative of C(A) with respect to A evaluated at F = A - // This function calculates H*dF - void addScaledCofactorMatrixDifferential(const btMatrix3x3& F, const btMatrix3x3& dF, btScalar scale, btMatrix3x3& M) - { - M[0][0] += scale * (dF[1][1] * F[2][2] + F[1][1] * dF[2][2] - dF[2][1] * F[1][2] - F[2][1] * dF[1][2]); - M[1][0] += scale * (dF[2][1] * F[0][2] + F[2][1] * dF[0][2] - dF[0][1] * F[2][2] - F[0][1] * dF[2][2]); - M[2][0] += scale * (dF[0][1] * F[1][2] + F[0][1] * dF[1][2] - dF[1][1] * F[0][2] - F[1][1] * dF[0][2]); - M[0][1] += scale * (dF[2][0] * F[1][2] + F[2][0] * dF[1][2] - dF[1][0] * F[2][2] - F[1][0] * dF[2][2]); - M[1][1] += scale * (dF[0][0] * F[2][2] + F[0][0] * dF[2][2] - dF[2][0] * F[0][2] - F[2][0] * dF[0][2]); - M[2][1] += scale * (dF[1][0] * F[0][2] + F[1][0] * dF[0][2] - dF[0][0] * F[1][2] - F[0][0] * dF[1][2]); - M[0][2] += scale * (dF[1][0] * F[2][1] + F[1][0] * dF[2][1] - dF[2][0] * F[1][1] - F[2][0] * dF[1][1]); - M[1][2] += scale * (dF[2][0] * F[0][1] + F[2][0] * dF[0][1] - dF[0][0] * F[2][1] - F[0][0] * dF[2][1]); - M[2][2] += scale * (dF[0][0] * F[1][1] + F[0][0] * dF[1][1] - dF[1][0] * F[0][1] - F[1][0] * dF[0][1]); - } - - virtual btDeformableLagrangianForceType getForceType() - { - return BT_NEOHOOKEAN_FORCE; - } - + // Let Q be the damping stress. + // This function calculates the dP = dQ/dF * dF + void firstPiolaDampingDifferential(const btSoftBody::TetraScratch& s, const btMatrix3x3& dF, btMatrix3x3& dP) + { + btScalar c1 = (m_mu_damp * (1. - 1. / (s.m_trace + 1.))); + btScalar c2 = ((2. * m_mu_damp) * DotProduct(s.m_F, dF) * (1. / ((1. + s.m_trace) * (1. + s.m_trace)))); + btScalar c3 = (m_lambda_damp * DotProduct(s.m_cofF, dF)); + dP = dF * c1 + s.m_F * c2; + addScaledCofactorMatrixDifferential(s.m_F, dF, m_lambda_damp * (s.m_J - 1.) - 0.75 * m_mu_damp, dP); + dP += s.m_cofF * c3; + } + + btScalar DotProduct(const btMatrix3x3& A, const btMatrix3x3& B) + { + btScalar ans = 0; + for (int i = 0; i < 3; ++i) + { + ans += A[i].dot(B[i]); + } + return ans; + } + + // Let C(A) be the cofactor of the matrix A + // Let H = the derivative of C(A) with respect to A evaluated at F = A + // This function calculates H*dF + void addScaledCofactorMatrixDifferential(const btMatrix3x3& F, const btMatrix3x3& dF, btScalar scale, btMatrix3x3& M) + { + M[0][0] += scale * (dF[1][1] * F[2][2] + F[1][1] * dF[2][2] - dF[2][1] * F[1][2] - F[2][1] * dF[1][2]); + M[1][0] += scale * (dF[2][1] * F[0][2] + F[2][1] * dF[0][2] - dF[0][1] * F[2][2] - F[0][1] * dF[2][2]); + M[2][0] += scale * (dF[0][1] * F[1][2] + F[0][1] * dF[1][2] - dF[1][1] * F[0][2] - F[1][1] * dF[0][2]); + M[0][1] += scale * (dF[2][0] * F[1][2] + F[2][0] * dF[1][2] - dF[1][0] * F[2][2] - F[1][0] * dF[2][2]); + M[1][1] += scale * (dF[0][0] * F[2][2] + F[0][0] * dF[2][2] - dF[2][0] * F[0][2] - F[2][0] * dF[0][2]); + M[2][1] += scale * (dF[1][0] * F[0][2] + F[1][0] * dF[0][2] - dF[0][0] * F[1][2] - F[0][0] * dF[1][2]); + M[0][2] += scale * (dF[1][0] * F[2][1] + F[1][0] * dF[2][1] - dF[2][0] * F[1][1] - F[2][0] * dF[1][1]); + M[1][2] += scale * (dF[2][0] * F[0][1] + F[2][0] * dF[0][1] - dF[0][0] * F[2][1] - F[0][0] * dF[2][1]); + M[2][2] += scale * (dF[0][0] * F[1][1] + F[0][0] * dF[1][1] - dF[1][0] * F[0][1] - F[1][0] * dF[0][1]); + } + + virtual btDeformableLagrangianForceType getForceType() + { + return BT_NEOHOOKEAN_FORCE; + } }; #endif /* BT_NEOHOOKEAN_H */ diff --git a/thirdparty/bullet/BulletSoftBody/btKrylovSolver.h b/thirdparty/bullet/BulletSoftBody/btKrylovSolver.h new file mode 100644 index 0000000000..59126b47ae --- /dev/null +++ b/thirdparty/bullet/BulletSoftBody/btKrylovSolver.h @@ -0,0 +1,107 @@ +/* + Written by Xuchen Han <xuchenhan2015@u.northwestern.edu> + + Bullet Continuous Collision Detection and Physics Library + Copyright (c) 2019 Google Inc. http://bulletphysics.org + This software is provided 'as-is', without any express or implied warranty. + In no event will the authors be held liable for any damages arising from the use of this software. + Permission is granted to anyone to use this software for any purpose, + including commercial applications, and to alter it and redistribute it freely, + subject to the following restrictions: + 1. The origin of this software must not be misrepresented; you must not claim that you wrote the original software. If you use this software in a product, an acknowledgment in the product documentation would be appreciated but is not required. + 2. Altered source versions must be plainly marked as such, and must not be misrepresented as being the original software. + 3. This notice may not be removed or altered from any source distribution. + */ + +#ifndef BT_KRYLOV_SOLVER_H +#define BT_KRYLOV_SOLVER_H +#include <iostream> +#include <cmath> +#include <limits> +#include <LinearMath/btAlignedObjectArray.h> +#include <LinearMath/btVector3.h> +#include <LinearMath/btScalar.h> +#include "LinearMath/btQuickprof.h" + +template <class MatrixX> +class btKrylovSolver +{ + typedef btAlignedObjectArray<btVector3> TVStack; + +public: + int m_maxIterations; + btScalar m_tolerance; + btKrylovSolver(int maxIterations, btScalar tolerance) + : m_maxIterations(maxIterations), m_tolerance(tolerance) + { + } + + virtual ~btKrylovSolver() {} + + virtual int solve(MatrixX& A, TVStack& x, const TVStack& b, bool verbose = false) = 0; + + virtual void reinitialize(const TVStack& b) = 0; + + virtual SIMD_FORCE_INLINE TVStack sub(const TVStack& a, const TVStack& b) + { + // c = a-b + btAssert(a.size() == b.size()); + TVStack c; + c.resize(a.size()); + for (int i = 0; i < a.size(); ++i) + { + c[i] = a[i] - b[i]; + } + return c; + } + + virtual SIMD_FORCE_INLINE btScalar squaredNorm(const TVStack& a) + { + return dot(a, a); + } + + virtual SIMD_FORCE_INLINE btScalar norm(const TVStack& a) + { + btScalar ret = 0; + for (int i = 0; i < a.size(); ++i) + { + for (int d = 0; d < 3; ++d) + { + ret = btMax(ret, btFabs(a[i][d])); + } + } + return ret; + } + + virtual SIMD_FORCE_INLINE btScalar dot(const TVStack& a, const TVStack& b) + { + btScalar ans(0); + for (int i = 0; i < a.size(); ++i) + ans += a[i].dot(b[i]); + return ans; + } + + virtual SIMD_FORCE_INLINE void multAndAddTo(btScalar s, const TVStack& a, TVStack& result) + { + // result += s*a + btAssert(a.size() == result.size()); + for (int i = 0; i < a.size(); ++i) + result[i] += s * a[i]; + } + + virtual SIMD_FORCE_INLINE TVStack multAndAdd(btScalar s, const TVStack& a, const TVStack& b) + { + // result = a*s + b + TVStack result; + result.resize(a.size()); + for (int i = 0; i < a.size(); ++i) + result[i] = s * a[i] + b[i]; + return result; + } + + virtual SIMD_FORCE_INLINE void setTolerance(btScalar tolerance) + { + m_tolerance = tolerance; + } +}; +#endif /* BT_KRYLOV_SOLVER_H */ diff --git a/thirdparty/bullet/BulletSoftBody/btPreconditioner.h b/thirdparty/bullet/BulletSoftBody/btPreconditioner.h index c2db448ef8..21c1106a42 100644 --- a/thirdparty/bullet/BulletSoftBody/btPreconditioner.h +++ b/thirdparty/bullet/BulletSoftBody/btPreconditioner.h @@ -19,269 +19,266 @@ class Preconditioner { public: - typedef btAlignedObjectArray<btVector3> TVStack; - virtual void operator()(const TVStack& x, TVStack& b) = 0; - virtual void reinitialize(bool nodeUpdated) = 0; - virtual ~Preconditioner(){} + typedef btAlignedObjectArray<btVector3> TVStack; + virtual void operator()(const TVStack& x, TVStack& b) = 0; + virtual void reinitialize(bool nodeUpdated) = 0; + virtual ~Preconditioner() {} }; class DefaultPreconditioner : public Preconditioner { public: - virtual void operator()(const TVStack& x, TVStack& b) - { - btAssert(b.size() == x.size()); - for (int i = 0; i < b.size(); ++i) - b[i] = x[i]; - } - virtual void reinitialize(bool nodeUpdated) - { - } - - virtual ~DefaultPreconditioner(){} + virtual void operator()(const TVStack& x, TVStack& b) + { + btAssert(b.size() == x.size()); + for (int i = 0; i < b.size(); ++i) + b[i] = x[i]; + } + virtual void reinitialize(bool nodeUpdated) + { + } + + virtual ~DefaultPreconditioner() {} }; class MassPreconditioner : public Preconditioner { - btAlignedObjectArray<btScalar> m_inv_mass; - const btAlignedObjectArray<btSoftBody *>& m_softBodies; + btAlignedObjectArray<btScalar> m_inv_mass; + const btAlignedObjectArray<btSoftBody*>& m_softBodies; + public: - MassPreconditioner(const btAlignedObjectArray<btSoftBody *>& softBodies) - : m_softBodies(softBodies) - { - } - - virtual void reinitialize(bool nodeUpdated) - { - if (nodeUpdated) - { - m_inv_mass.clear(); - for (int i = 0; i < m_softBodies.size(); ++i) - { - btSoftBody* psb = m_softBodies[i]; - for (int j = 0; j < psb->m_nodes.size(); ++j) - m_inv_mass.push_back(psb->m_nodes[j].m_im); - } - } - } - - virtual void operator()(const TVStack& x, TVStack& b) - { - btAssert(b.size() == x.size()); - btAssert(m_inv_mass.size() <= x.size()); - for (int i = 0; i < m_inv_mass.size(); ++i) - { - b[i] = x[i] * m_inv_mass[i]; - } - for (int i = m_inv_mass.size(); i < b.size(); ++i) - { - b[i] = x[i]; - } - } -}; + MassPreconditioner(const btAlignedObjectArray<btSoftBody*>& softBodies) + : m_softBodies(softBodies) + { + } + virtual void reinitialize(bool nodeUpdated) + { + if (nodeUpdated) + { + m_inv_mass.clear(); + for (int i = 0; i < m_softBodies.size(); ++i) + { + btSoftBody* psb = m_softBodies[i]; + for (int j = 0; j < psb->m_nodes.size(); ++j) + m_inv_mass.push_back(psb->m_nodes[j].m_im); + } + } + } + + virtual void operator()(const TVStack& x, TVStack& b) + { + btAssert(b.size() == x.size()); + btAssert(m_inv_mass.size() <= x.size()); + for (int i = 0; i < m_inv_mass.size(); ++i) + { + b[i] = x[i] * m_inv_mass[i]; + } + for (int i = m_inv_mass.size(); i < b.size(); ++i) + { + b[i] = x[i]; + } + } +}; class KKTPreconditioner : public Preconditioner { - const btAlignedObjectArray<btSoftBody *>& m_softBodies; - const btDeformableContactProjection& m_projections; - const btAlignedObjectArray<btDeformableLagrangianForce*>& m_lf; - TVStack m_inv_A, m_inv_S; - const btScalar& m_dt; - const bool& m_implicit; + const btAlignedObjectArray<btSoftBody*>& m_softBodies; + const btDeformableContactProjection& m_projections; + const btAlignedObjectArray<btDeformableLagrangianForce*>& m_lf; + TVStack m_inv_A, m_inv_S; + const btScalar& m_dt; + const bool& m_implicit; + public: - KKTPreconditioner(const btAlignedObjectArray<btSoftBody *>& softBodies, const btDeformableContactProjection& projections, const btAlignedObjectArray<btDeformableLagrangianForce*>& lf, const btScalar& dt, const bool& implicit) - : m_softBodies(softBodies) - , m_projections(projections) - , m_lf(lf) - , m_dt(dt) - , m_implicit(implicit) - { - } - - virtual void reinitialize(bool nodeUpdated) - { - if (nodeUpdated) - { - int num_nodes = 0; - for (int i = 0; i < m_softBodies.size(); ++i) - { - btSoftBody* psb = m_softBodies[i]; - num_nodes += psb->m_nodes.size(); - } - m_inv_A.resize(num_nodes); - } - buildDiagonalA(m_inv_A); - for (int i = 0; i < m_inv_A.size(); ++i) - { -// printf("A[%d] = %f, %f, %f \n", i, m_inv_A[i][0], m_inv_A[i][1], m_inv_A[i][2]); - for (int d = 0; d < 3; ++d) - { - m_inv_A[i][d] = (m_inv_A[i][d] == 0) ? 0.0 : 1.0/ m_inv_A[i][d]; - } - } - m_inv_S.resize(m_projections.m_lagrangeMultipliers.size()); -// printf("S.size() = %d \n", m_inv_S.size()); - buildDiagonalS(m_inv_A, m_inv_S); - for (int i = 0; i < m_inv_S.size(); ++i) - { -// printf("S[%d] = %f, %f, %f \n", i, m_inv_S[i][0], m_inv_S[i][1], m_inv_S[i][2]); - for (int d = 0; d < 3; ++d) - { - m_inv_S[i][d] = (m_inv_S[i][d] == 0) ? 0.0 : 1.0/ m_inv_S[i][d]; - } - } - } - - void buildDiagonalA(TVStack& diagA) const - { - size_t counter = 0; - for (int i = 0; i < m_softBodies.size(); ++i) - { - btSoftBody* psb = m_softBodies[i]; - for (int j = 0; j < psb->m_nodes.size(); ++j) - { - const btSoftBody::Node& node = psb->m_nodes[j]; - diagA[counter] = (node.m_im == 0) ? btVector3(0,0,0) : btVector3(1.0/node.m_im, 1.0 / node.m_im, 1.0 / node.m_im); - ++counter; - } - } - if (m_implicit) - { - printf("implicit not implemented\n"); - btAssert(false); - } - for (int i = 0; i < m_lf.size(); ++i) - { - // add damping matrix - m_lf[i]->buildDampingForceDifferentialDiagonal(-m_dt, diagA); - } - } - - void buildDiagonalS(const TVStack& inv_A, TVStack& diagS) - { - for (int c = 0; c < m_projections.m_lagrangeMultipliers.size(); ++c) - { - // S[k,k] = e_k^T * C A_d^-1 C^T * e_k - const LagrangeMultiplier& lm = m_projections.m_lagrangeMultipliers[c]; - btVector3& t = diagS[c]; - t.setZero(); - for (int j = 0; j < lm.m_num_constraints; ++j) - { - for (int i = 0; i < lm.m_num_nodes; ++i) - { - for (int d = 0; d < 3; ++d) - { - t[j] += inv_A[lm.m_indices[i]][d] * lm.m_dirs[j][d] * lm.m_dirs[j][d] * lm.m_weights[i] * lm.m_weights[i]; - } - } - } - } - } -#define USE_FULL_PRECONDITIONER + KKTPreconditioner(const btAlignedObjectArray<btSoftBody*>& softBodies, const btDeformableContactProjection& projections, const btAlignedObjectArray<btDeformableLagrangianForce*>& lf, const btScalar& dt, const bool& implicit) + : m_softBodies(softBodies), m_projections(projections), m_lf(lf), m_dt(dt), m_implicit(implicit) + { + } + + virtual void reinitialize(bool nodeUpdated) + { + if (nodeUpdated) + { + int num_nodes = 0; + for (int i = 0; i < m_softBodies.size(); ++i) + { + btSoftBody* psb = m_softBodies[i]; + num_nodes += psb->m_nodes.size(); + } + m_inv_A.resize(num_nodes); + } + buildDiagonalA(m_inv_A); + for (int i = 0; i < m_inv_A.size(); ++i) + { + // printf("A[%d] = %f, %f, %f \n", i, m_inv_A[i][0], m_inv_A[i][1], m_inv_A[i][2]); + for (int d = 0; d < 3; ++d) + { + m_inv_A[i][d] = (m_inv_A[i][d] == 0) ? 0.0 : 1.0 / m_inv_A[i][d]; + } + } + m_inv_S.resize(m_projections.m_lagrangeMultipliers.size()); + // printf("S.size() = %d \n", m_inv_S.size()); + buildDiagonalS(m_inv_A, m_inv_S); + for (int i = 0; i < m_inv_S.size(); ++i) + { + // printf("S[%d] = %f, %f, %f \n", i, m_inv_S[i][0], m_inv_S[i][1], m_inv_S[i][2]); + for (int d = 0; d < 3; ++d) + { + m_inv_S[i][d] = (m_inv_S[i][d] == 0) ? 0.0 : 1.0 / m_inv_S[i][d]; + } + } + } + + void buildDiagonalA(TVStack& diagA) const + { + size_t counter = 0; + for (int i = 0; i < m_softBodies.size(); ++i) + { + btSoftBody* psb = m_softBodies[i]; + for (int j = 0; j < psb->m_nodes.size(); ++j) + { + const btSoftBody::Node& node = psb->m_nodes[j]; + diagA[counter] = (node.m_im == 0) ? btVector3(0, 0, 0) : btVector3(1.0 / node.m_im, 1.0 / node.m_im, 1.0 / node.m_im); + ++counter; + } + } + if (m_implicit) + { + printf("implicit not implemented\n"); + btAssert(false); + } + for (int i = 0; i < m_lf.size(); ++i) + { + // add damping matrix + m_lf[i]->buildDampingForceDifferentialDiagonal(-m_dt, diagA); + } + } + + void buildDiagonalS(const TVStack& inv_A, TVStack& diagS) + { + for (int c = 0; c < m_projections.m_lagrangeMultipliers.size(); ++c) + { + // S[k,k] = e_k^T * C A_d^-1 C^T * e_k + const LagrangeMultiplier& lm = m_projections.m_lagrangeMultipliers[c]; + btVector3& t = diagS[c]; + t.setZero(); + for (int j = 0; j < lm.m_num_constraints; ++j) + { + for (int i = 0; i < lm.m_num_nodes; ++i) + { + for (int d = 0; d < 3; ++d) + { + t[j] += inv_A[lm.m_indices[i]][d] * lm.m_dirs[j][d] * lm.m_dirs[j][d] * lm.m_weights[i] * lm.m_weights[i]; + } + } + } + } + } +//#define USE_FULL_PRECONDITIONER #ifndef USE_FULL_PRECONDITIONER - virtual void operator()(const TVStack& x, TVStack& b) - { - btAssert(b.size() == x.size()); - for (int i = 0; i < m_inv_A.size(); ++i) - { - b[i] = x[i] * m_inv_A[i]; - } - int offset = m_inv_A.size(); - for (int i = 0; i < m_inv_S.size(); ++i) - { - b[i+offset] = x[i+offset] * m_inv_S[i]; - } - } + virtual void operator()(const TVStack& x, TVStack& b) + { + btAssert(b.size() == x.size()); + for (int i = 0; i < m_inv_A.size(); ++i) + { + b[i] = x[i] * m_inv_A[i]; + } + int offset = m_inv_A.size(); + for (int i = 0; i < m_inv_S.size(); ++i) + { + b[i + offset] = x[i + offset] * m_inv_S[i]; + } + } #else - virtual void operator()(const TVStack& x, TVStack& b) - { - btAssert(b.size() == x.size()); - int offset = m_inv_A.size(); + virtual void operator()(const TVStack& x, TVStack& b) + { + btAssert(b.size() == x.size()); + int offset = m_inv_A.size(); - for (int i = 0; i < m_inv_A.size(); ++i) - { - b[i] = x[i] * m_inv_A[i]; - } + for (int i = 0; i < m_inv_A.size(); ++i) + { + b[i] = x[i] * m_inv_A[i]; + } - for (int i = 0; i < m_inv_S.size(); ++i) - { - b[i+offset].setZero(); - } + for (int i = 0; i < m_inv_S.size(); ++i) + { + b[i + offset].setZero(); + } - for (int c = 0; c < m_projections.m_lagrangeMultipliers.size(); ++c) - { - const LagrangeMultiplier& lm = m_projections.m_lagrangeMultipliers[c]; - // C * x - for (int d = 0; d < lm.m_num_constraints; ++d) - { - for (int i = 0; i < lm.m_num_nodes; ++i) - { - b[offset+c][d] += lm.m_weights[i] * b[lm.m_indices[i]].dot(lm.m_dirs[d]); - } - } - } + for (int c = 0; c < m_projections.m_lagrangeMultipliers.size(); ++c) + { + const LagrangeMultiplier& lm = m_projections.m_lagrangeMultipliers[c]; + // C * x + for (int d = 0; d < lm.m_num_constraints; ++d) + { + for (int i = 0; i < lm.m_num_nodes; ++i) + { + b[offset + c][d] += lm.m_weights[i] * b[lm.m_indices[i]].dot(lm.m_dirs[d]); + } + } + } - for (int i = 0; i < m_inv_S.size(); ++i) - { - b[i+offset] = b[i+offset] * m_inv_S[i]; - } + for (int i = 0; i < m_inv_S.size(); ++i) + { + b[i + offset] = b[i + offset] * m_inv_S[i]; + } - for (int i = 0; i < m_inv_A.size(); ++i) - { - b[i].setZero(); - } + for (int i = 0; i < m_inv_A.size(); ++i) + { + b[i].setZero(); + } - for (int c = 0; c < m_projections.m_lagrangeMultipliers.size(); ++c) - { - // C^T * lambda - const LagrangeMultiplier& lm = m_projections.m_lagrangeMultipliers[c]; - for (int i = 0; i < lm.m_num_nodes; ++i) - { - for (int j = 0; j < lm.m_num_constraints; ++j) - { - b[lm.m_indices[i]] += b[offset+c][j] * lm.m_weights[i] * lm.m_dirs[j]; - } - } - } + for (int c = 0; c < m_projections.m_lagrangeMultipliers.size(); ++c) + { + // C^T * lambda + const LagrangeMultiplier& lm = m_projections.m_lagrangeMultipliers[c]; + for (int i = 0; i < lm.m_num_nodes; ++i) + { + for (int j = 0; j < lm.m_num_constraints; ++j) + { + b[lm.m_indices[i]] += b[offset + c][j] * lm.m_weights[i] * lm.m_dirs[j]; + } + } + } - for (int i = 0; i < m_inv_A.size(); ++i) - { - b[i] = (x[i] - b[i]) * m_inv_A[i]; - } + for (int i = 0; i < m_inv_A.size(); ++i) + { + b[i] = (x[i] - b[i]) * m_inv_A[i]; + } - TVStack t; - t.resize(b.size()); - for (int i = 0; i < m_inv_S.size(); ++i) - { - t[i+offset] = x[i+offset] * m_inv_S[i]; - } - for (int i = 0; i < m_inv_A.size(); ++i) - { - t[i].setZero(); - } - for (int c = 0; c < m_projections.m_lagrangeMultipliers.size(); ++c) - { - // C^T * lambda - const LagrangeMultiplier& lm = m_projections.m_lagrangeMultipliers[c]; - for (int i = 0; i < lm.m_num_nodes; ++i) - { - for (int j = 0; j < lm.m_num_constraints; ++j) - { - t[lm.m_indices[i]] += t[offset+c][j] * lm.m_weights[i] * lm.m_dirs[j]; - } - } - } - for (int i = 0; i < m_inv_A.size(); ++i) - { - b[i] += t[i] * m_inv_A[i]; - } + TVStack t; + t.resize(b.size()); + for (int i = 0; i < m_inv_S.size(); ++i) + { + t[i + offset] = x[i + offset] * m_inv_S[i]; + } + for (int i = 0; i < m_inv_A.size(); ++i) + { + t[i].setZero(); + } + for (int c = 0; c < m_projections.m_lagrangeMultipliers.size(); ++c) + { + // C^T * lambda + const LagrangeMultiplier& lm = m_projections.m_lagrangeMultipliers[c]; + for (int i = 0; i < lm.m_num_nodes; ++i) + { + for (int j = 0; j < lm.m_num_constraints; ++j) + { + t[lm.m_indices[i]] += t[offset + c][j] * lm.m_weights[i] * lm.m_dirs[j]; + } + } + } + for (int i = 0; i < m_inv_A.size(); ++i) + { + b[i] += t[i] * m_inv_A[i]; + } - for (int i = 0; i < m_inv_S.size(); ++i) - { - b[i+offset] -= x[i+offset] * m_inv_S[i]; - } - } + for (int i = 0; i < m_inv_S.size(); ++i) + { + b[i + offset] -= x[i + offset] * m_inv_S[i]; + } + } #endif }; diff --git a/thirdparty/bullet/BulletSoftBody/btSoftBody.cpp b/thirdparty/bullet/BulletSoftBody/btSoftBody.cpp index 81b846d7f8..d1980ea6c5 100644 --- a/thirdparty/bullet/BulletSoftBody/btSoftBody.cpp +++ b/thirdparty/bullet/BulletSoftBody/btSoftBody.cpp @@ -37,12 +37,12 @@ static inline btDbvtNode* buildTreeBottomUp(btAlignedObjectArray<btDbvtNode*>& l { btAlignedObjectArray<bool> marked; btAlignedObjectArray<btDbvtNode*> newLeafNodes; - btAlignedObjectArray<std::pair<int,int> > childIds; + btAlignedObjectArray<std::pair<int, int> > childIds; btAlignedObjectArray<btAlignedObjectArray<int> > newAdj; marked.resize(N); for (int i = 0; i < N; ++i) marked[i] = false; - + // pair adjacent nodes into new(parent) node for (int i = 0; i < N; ++i) { @@ -61,7 +61,7 @@ static inline btDbvtNode* buildTreeBottomUp(btAlignedObjectArray<btDbvtNode*>& l leafNodes[i]->parent = node; leafNodes[n]->parent = node; newLeafNodes.push_back(node); - childIds.push_back(std::make_pair(i,n)); + childIds.push_back(std::make_pair(i, n)); merged = true; marked[n] = true; break; @@ -70,7 +70,7 @@ static inline btDbvtNode* buildTreeBottomUp(btAlignedObjectArray<btDbvtNode*>& l if (!merged) { newLeafNodes.push_back(leafNodes[i]); - childIds.push_back(std::make_pair(i,-1)); + childIds.push_back(std::make_pair(i, -1)); } marked[i] = true; } @@ -78,7 +78,7 @@ static inline btDbvtNode* buildTreeBottomUp(btAlignedObjectArray<btDbvtNode*>& l newAdj.resize(newLeafNodes.size()); for (int i = 0; i < newLeafNodes.size(); ++i) { - for (int j = i+1; j < newLeafNodes.size(); ++j) + for (int j = i + 1; j < newLeafNodes.size(); ++j) { bool neighbor = false; const btAlignedObjectArray<int>& leftChildNeighbors = adj[childIds[i].first]; @@ -143,7 +143,7 @@ btSoftBody::btSoftBody(btSoftBodyWorldInfo* worldInfo, int node_count, const btV /* Nodes */ const btScalar margin = getCollisionShape()->getMargin(); m_nodes.resize(node_count); - m_X.resize(node_count); + m_X.resize(node_count); for (int i = 0, ni = node_count; i < ni; ++i) { Node& n = m_nodes[i]; @@ -154,7 +154,7 @@ btSoftBody::btSoftBody(btSoftBodyWorldInfo* worldInfo, int node_count, const btV n.m_im = n.m_im > 0 ? 1 / n.m_im : 0; n.m_leaf = m_ndbvt.insert(btDbvtVolume::FromCR(n.m_x, margin), &n); n.m_material = pm; - m_X[i] = n.m_x; + m_X[i] = n.m_x; } updateBounds(); setCollisionQuadrature(3); @@ -195,8 +195,8 @@ void btSoftBody::initDefaults() m_cfg.piterations = 1; m_cfg.diterations = 0; m_cfg.citerations = 4; - m_cfg.drag = 0; - m_cfg.m_maxStress = 0; + m_cfg.drag = 0; + m_cfg.m_maxStress = 0; m_cfg.collisions = fCollision::Default; m_pose.m_bvolume = false; m_pose.m_bframe = false; @@ -222,12 +222,14 @@ void btSoftBody::initDefaults() m_windVelocity = btVector3(0, 0, 0); m_restLengthScale = btScalar(1.0); m_dampingCoefficient = 1.0; - m_sleepingThreshold = .4; + m_sleepingThreshold = .04; m_useSelfCollision = false; m_collisionFlags = 0; m_softSoftCollision = false; m_maxSpeedSquared = 0; m_repulsionStiffness = 0.5; + m_gravityFactor = 1; + m_cacheBarycenter = false; m_fdbvnt = 0; } @@ -436,7 +438,7 @@ void btSoftBody::appendFace(int model, Material* mat) ZeroInitialize(f); f.m_material = mat ? mat : m_materials[0]; } - m_faces.push_back(f); + m_faces.push_back(f); } // @@ -525,94 +527,111 @@ void btSoftBody::appendAnchor(int node, btRigidBody* body, const btVector3& loca // void btSoftBody::appendDeformableAnchor(int node, btRigidBody* body) { - DeformableNodeRigidAnchor c; - btSoftBody::Node& n = m_nodes[node]; - const btScalar ima = n.m_im; - const btScalar imb = body->getInvMass(); - btVector3 nrm; - const btCollisionShape* shp = body->getCollisionShape(); - const btTransform& wtr = body->getWorldTransform(); - btScalar dst = - m_worldInfo->m_sparsesdf.Evaluate( - wtr.invXform(m_nodes[node].m_x), - shp, - nrm, - 0); - - c.m_cti.m_colObj = body; - c.m_cti.m_normal = wtr.getBasis() * nrm; - c.m_cti.m_offset = dst; - c.m_node = &m_nodes[node]; - const btScalar fc = m_cfg.kDF * body->getFriction(); - c.m_c2 = ima; - c.m_c3 = fc; - c.m_c4 = body->isStaticOrKinematicObject() ? m_cfg.kKHR : m_cfg.kCHR; - static const btMatrix3x3 iwiStatic(0, 0, 0, 0, 0, 0, 0, 0, 0); - const btMatrix3x3& iwi = body->getInvInertiaTensorWorld(); - const btVector3 ra = n.m_x - wtr.getOrigin(); - - c.m_c0 = ImpulseMatrix(1, ima, imb, iwi, ra); - c.m_c1 = ra; - c.m_local = body->getWorldTransform().inverse() * m_nodes[node].m_x; - c.m_node->m_battach = 1; - m_deformableAnchors.push_back(c); + DeformableNodeRigidAnchor c; + btSoftBody::Node& n = m_nodes[node]; + const btScalar ima = n.m_im; + const btScalar imb = body->getInvMass(); + btVector3 nrm; + const btCollisionShape* shp = body->getCollisionShape(); + const btTransform& wtr = body->getWorldTransform(); + btScalar dst = + m_worldInfo->m_sparsesdf.Evaluate( + wtr.invXform(m_nodes[node].m_x), + shp, + nrm, + 0); + + c.m_cti.m_colObj = body; + c.m_cti.m_normal = wtr.getBasis() * nrm; + c.m_cti.m_offset = dst; + c.m_node = &m_nodes[node]; + const btScalar fc = m_cfg.kDF * body->getFriction(); + c.m_c2 = ima; + c.m_c3 = fc; + c.m_c4 = body->isStaticOrKinematicObject() ? m_cfg.kKHR : m_cfg.kCHR; + static const btMatrix3x3 iwiStatic(0, 0, 0, 0, 0, 0, 0, 0, 0); + const btMatrix3x3& iwi = body->getInvInertiaTensorWorld(); + const btVector3 ra = n.m_x - wtr.getOrigin(); + + c.m_c0 = ImpulseMatrix(1, ima, imb, iwi, ra); + c.m_c1 = ra; + c.m_local = body->getWorldTransform().inverse() * m_nodes[node].m_x; + c.m_node->m_battach = 1; + m_deformableAnchors.push_back(c); +} + +void btSoftBody::removeAnchor(int node) +{ + const btSoftBody::Node& n = m_nodes[node]; + for (int i = 0; i < m_deformableAnchors.size();) + { + const DeformableNodeRigidAnchor& c = m_deformableAnchors[i]; + if (c.m_node == &n) + { + m_deformableAnchors.removeAtIndex(i); + } + else + { + i++; + } + } } // void btSoftBody::appendDeformableAnchor(int node, btMultiBodyLinkCollider* link) { - DeformableNodeRigidAnchor c; - btSoftBody::Node& n = m_nodes[node]; - const btScalar ima = n.m_im; - btVector3 nrm; - const btCollisionShape* shp = link->getCollisionShape(); - const btTransform& wtr = link->getWorldTransform(); - btScalar dst = - m_worldInfo->m_sparsesdf.Evaluate( - wtr.invXform(m_nodes[node].m_x), - shp, - nrm, - 0); - c.m_cti.m_colObj = link; - c.m_cti.m_normal = wtr.getBasis() * nrm; - c.m_cti.m_offset = dst; - c.m_node = &m_nodes[node]; - const btScalar fc = m_cfg.kDF * link->getFriction(); - c.m_c2 = ima; - c.m_c3 = fc; - c.m_c4 = link->isStaticOrKinematicObject() ? m_cfg.kKHR : m_cfg.kCHR; - btVector3 normal = c.m_cti.m_normal; - btVector3 t1 = generateUnitOrthogonalVector(normal); - btVector3 t2 = btCross(normal, t1); - btMultiBodyJacobianData jacobianData_normal, jacobianData_t1, jacobianData_t2; - findJacobian(link, jacobianData_normal, c.m_node->m_x, normal); - findJacobian(link, jacobianData_t1, c.m_node->m_x, t1); - findJacobian(link, jacobianData_t2, c.m_node->m_x, t2); - - btScalar* J_n = &jacobianData_normal.m_jacobians[0]; - btScalar* J_t1 = &jacobianData_t1.m_jacobians[0]; - btScalar* J_t2 = &jacobianData_t2.m_jacobians[0]; - - btScalar* u_n = &jacobianData_normal.m_deltaVelocitiesUnitImpulse[0]; - btScalar* u_t1 = &jacobianData_t1.m_deltaVelocitiesUnitImpulse[0]; - btScalar* u_t2 = &jacobianData_t2.m_deltaVelocitiesUnitImpulse[0]; - - btMatrix3x3 rot(normal.getX(), normal.getY(), normal.getZ(), - t1.getX(), t1.getY(), t1.getZ(), - t2.getX(), t2.getY(), t2.getZ()); // world frame to local frame - const int ndof = link->m_multiBody->getNumDofs() + 6; - btMatrix3x3 local_impulse_matrix = (Diagonal(n.m_im) + OuterProduct(J_n, J_t1, J_t2, u_n, u_t1, u_t2, ndof)).inverse(); - c.m_c0 = rot.transpose() * local_impulse_matrix * rot; - c.jacobianData_normal = jacobianData_normal; - c.jacobianData_t1 = jacobianData_t1; - c.jacobianData_t2 = jacobianData_t2; - c.t1 = t1; - c.t2 = t2; - const btVector3 ra = n.m_x - wtr.getOrigin(); - c.m_c1 = ra; - c.m_local = link->getWorldTransform().inverse() * m_nodes[node].m_x; - c.m_node->m_battach = 1; - m_deformableAnchors.push_back(c); + DeformableNodeRigidAnchor c; + btSoftBody::Node& n = m_nodes[node]; + const btScalar ima = n.m_im; + btVector3 nrm; + const btCollisionShape* shp = link->getCollisionShape(); + const btTransform& wtr = link->getWorldTransform(); + btScalar dst = + m_worldInfo->m_sparsesdf.Evaluate( + wtr.invXform(m_nodes[node].m_x), + shp, + nrm, + 0); + c.m_cti.m_colObj = link; + c.m_cti.m_normal = wtr.getBasis() * nrm; + c.m_cti.m_offset = dst; + c.m_node = &m_nodes[node]; + const btScalar fc = m_cfg.kDF * link->getFriction(); + c.m_c2 = ima; + c.m_c3 = fc; + c.m_c4 = link->isStaticOrKinematicObject() ? m_cfg.kKHR : m_cfg.kCHR; + btVector3 normal = c.m_cti.m_normal; + btVector3 t1 = generateUnitOrthogonalVector(normal); + btVector3 t2 = btCross(normal, t1); + btMultiBodyJacobianData jacobianData_normal, jacobianData_t1, jacobianData_t2; + findJacobian(link, jacobianData_normal, c.m_node->m_x, normal); + findJacobian(link, jacobianData_t1, c.m_node->m_x, t1); + findJacobian(link, jacobianData_t2, c.m_node->m_x, t2); + + btScalar* J_n = &jacobianData_normal.m_jacobians[0]; + btScalar* J_t1 = &jacobianData_t1.m_jacobians[0]; + btScalar* J_t2 = &jacobianData_t2.m_jacobians[0]; + + btScalar* u_n = &jacobianData_normal.m_deltaVelocitiesUnitImpulse[0]; + btScalar* u_t1 = &jacobianData_t1.m_deltaVelocitiesUnitImpulse[0]; + btScalar* u_t2 = &jacobianData_t2.m_deltaVelocitiesUnitImpulse[0]; + + btMatrix3x3 rot(normal.getX(), normal.getY(), normal.getZ(), + t1.getX(), t1.getY(), t1.getZ(), + t2.getX(), t2.getY(), t2.getZ()); // world frame to local frame + const int ndof = link->m_multiBody->getNumDofs() + 6; + btMatrix3x3 local_impulse_matrix = (Diagonal(n.m_im) + OuterProduct(J_n, J_t1, J_t2, u_n, u_t1, u_t2, ndof)).inverse(); + c.m_c0 = rot.transpose() * local_impulse_matrix * rot; + c.jacobianData_normal = jacobianData_normal; + c.jacobianData_t1 = jacobianData_t1; + c.jacobianData_t2 = jacobianData_t2; + c.t1 = t1; + c.t2 = t2; + const btVector3 ra = n.m_x - wtr.getOrigin(); + c.m_c1 = ra; + c.m_local = link->getWorldTransform().inverse() * m_nodes[node].m_x; + c.m_node->m_battach = 1; + m_deformableAnchors.push_back(c); } // void btSoftBody::appendLinearJoint(const LJoint::Specs& specs, Cluster* body0, Body body1) @@ -731,7 +750,7 @@ void btSoftBody::addAeroForceToNode(const btVector3& windVelocity, int nodeIndex fDrag = 0.5f * kDG * medium.m_density * rel_v2 * tri_area * n_dot_v * (-rel_v_nrm); // Check angle of attack - // cos(10º) = 0.98480 + // cos(10º) = 0.98480 if (0 < n_dot_v && n_dot_v < 0.98480f) fLift = 0.5f * kLF * medium.m_density * rel_v_len * tri_area * btSqrt(1.0f - n_dot_v * n_dot_v) * (nrm.cross(rel_v_nrm).cross(rel_v_nrm)); @@ -817,7 +836,7 @@ void btSoftBody::addAeroForceToFace(const btVector3& windVelocity, int faceIndex fDrag = 0.5f * kDG * medium.m_density * rel_v2 * tri_area * n_dot_v * (-rel_v_nrm); // Check angle of attack - // cos(10º) = 0.98480 + // cos(10º) = 0.98480 if (0 < n_dot_v && n_dot_v < 0.98480f) fLift = 0.5f * kLF * medium.m_density * rel_v_len * tri_area * btSqrt(1.0f - n_dot_v * n_dot_v) * (nrm.cross(rel_v_nrm).cross(rel_v_nrm)); @@ -882,6 +901,7 @@ void btSoftBody::setVelocity(const btVector3& velocity) if (n.m_im > 0) { n.m_v = velocity; + n.m_vn = velocity; } } } @@ -1010,66 +1030,70 @@ void btSoftBody::setVolumeDensity(btScalar density) // btVector3 btSoftBody::getLinearVelocity() { - btVector3 total_momentum = btVector3(0,0,0); - for (int i = 0; i < m_nodes.size(); ++i) - { - btScalar mass = m_nodes[i].m_im == 0 ? 0 : 1.0/m_nodes[i].m_im; - total_momentum += mass * m_nodes[i].m_v; - } - btScalar total_mass = getTotalMass(); - return total_mass == 0 ? total_momentum : total_momentum / total_mass; + btVector3 total_momentum = btVector3(0, 0, 0); + for (int i = 0; i < m_nodes.size(); ++i) + { + btScalar mass = m_nodes[i].m_im == 0 ? 0 : 1.0 / m_nodes[i].m_im; + total_momentum += mass * m_nodes[i].m_v; + } + btScalar total_mass = getTotalMass(); + return total_mass == 0 ? total_momentum : total_momentum / total_mass; } // void btSoftBody::setLinearVelocity(const btVector3& linVel) { - btVector3 old_vel = getLinearVelocity(); - btVector3 diff = linVel - old_vel; - for (int i = 0; i < m_nodes.size(); ++i) - m_nodes[i].m_v += diff; + btVector3 old_vel = getLinearVelocity(); + btVector3 diff = linVel - old_vel; + for (int i = 0; i < m_nodes.size(); ++i) + m_nodes[i].m_v += diff; } // void btSoftBody::setAngularVelocity(const btVector3& angVel) { - btVector3 old_vel = getLinearVelocity(); - btVector3 com = getCenterOfMass(); - for (int i = 0; i < m_nodes.size(); ++i) - { - m_nodes[i].m_v = angVel.cross(m_nodes[i].m_x - com) + old_vel; - } + btVector3 old_vel = getLinearVelocity(); + btVector3 com = getCenterOfMass(); + for (int i = 0; i < m_nodes.size(); ++i) + { + m_nodes[i].m_v = angVel.cross(m_nodes[i].m_x - com) + old_vel; + } } // btTransform btSoftBody::getRigidTransform() { - btVector3 t = getCenterOfMass(); - btMatrix3x3 S; - S.setZero(); - // get rotation that minimizes L2 difference: \sum_i || RX_i + t - x_i || - for (int i = 0; i < m_nodes.size(); ++i) - { - S += OuterProduct(m_X[i], t-m_nodes[i].m_x); - } - btVector3 sigma; - btMatrix3x3 U,V; - singularValueDecomposition(S,U,sigma,V); - btMatrix3x3 R = V * U.transpose(); - btTransform trs; - trs.setIdentity(); - trs.setOrigin(t); - trs.setBasis(R); - return trs; + btVector3 t = getCenterOfMass(); + btMatrix3x3 S; + S.setZero(); + // Get rotation that minimizes L2 difference: \sum_i || RX_i + t - x_i || + // It's important to make sure that S has the correct signs. + // SVD is only unique up to the ordering of singular values. + // SVD will manipulate U and V to ensure the ordering of singular values. If all three singular + // vaues are negative, SVD will permute colums of U to make two of them positive. + for (int i = 0; i < m_nodes.size(); ++i) + { + S -= OuterProduct(m_X[i], t - m_nodes[i].m_x); + } + btVector3 sigma; + btMatrix3x3 U, V; + singularValueDecomposition(S, U, sigma, V); + btMatrix3x3 R = V * U.transpose(); + btTransform trs; + trs.setIdentity(); + trs.setOrigin(t); + trs.setBasis(R); + return trs; } // void btSoftBody::transformTo(const btTransform& trs) { - // get the current best rigid fit - btTransform current_transform = getRigidTransform(); - // apply transform in material space - btTransform new_transform = trs * current_transform.inverse(); - transform(new_transform); + // get the current best rigid fit + btTransform current_transform = getRigidTransform(); + // apply transform in material space + btTransform new_transform = trs * current_transform.inverse(); + transform(new_transform); } // @@ -1130,7 +1154,7 @@ void btSoftBody::scale(const btVector3& scl) updateNormals(); updateBounds(); updateConstants(); - initializeDmInverse(); + initializeDmInverse(); } // @@ -2010,22 +2034,22 @@ bool btSoftBody::rayTest(const btVector3& rayFrom, } bool btSoftBody::rayFaceTest(const btVector3& rayFrom, - const btVector3& rayTo, - sRayCast& results) + const btVector3& rayTo, + sRayCast& results) { if (m_faces.size() == 0) return false; else { - if (m_fdbvt.empty()) - initializeFaceTree(); + if (m_fdbvt.empty()) + initializeFaceTree(); } - - results.body = this; - results.fraction = 1.f; - results.index = -1; - - return (rayFaceTest(rayFrom, rayTo, results.fraction, results.index) != 0); + + results.body = this; + results.fraction = 1.f; + results.index = -1; + + return (rayFaceTest(rayFrom, rayTo, results.fraction, results.index) != 0); } // @@ -2056,112 +2080,111 @@ void btSoftBody::setSolver(eSolverPresets::_ preset) void btSoftBody::predictMotion(btScalar dt) { - int i, ni; - - /* Update */ - if (m_bUpdateRtCst) - { - m_bUpdateRtCst = false; - updateConstants(); - m_fdbvt.clear(); - if (m_cfg.collisions & fCollision::VF_SS) - { - initializeFaceTree(); - } - } - - /* Prepare */ - m_sst.sdt = dt * m_cfg.timescale; - m_sst.isdt = 1 / m_sst.sdt; - m_sst.velmrg = m_sst.sdt * 3; - m_sst.radmrg = getCollisionShape()->getMargin(); - m_sst.updmrg = m_sst.radmrg * (btScalar)0.25; - /* Forces */ - addVelocity(m_worldInfo->m_gravity * m_sst.sdt); - applyForces(); - /* Integrate */ - for (i = 0, ni = m_nodes.size(); i < ni; ++i) - { - Node& n = m_nodes[i]; - n.m_q = n.m_x; - btVector3 deltaV = n.m_f * n.m_im * m_sst.sdt; - { - btScalar maxDisplacement = m_worldInfo->m_maxDisplacement; - btScalar clampDeltaV = maxDisplacement / m_sst.sdt; - for (int c = 0; c < 3; c++) - { - if (deltaV[c] > clampDeltaV) - { - deltaV[c] = clampDeltaV; - } - if (deltaV[c] < -clampDeltaV) - { - deltaV[c] = -clampDeltaV; - } - } - } - n.m_v += deltaV; - n.m_x += n.m_v * m_sst.sdt; - n.m_f = btVector3(0, 0, 0); - } - /* Clusters */ - updateClusters(); - /* Bounds */ - updateBounds(); - /* Nodes */ - ATTRIBUTE_ALIGNED16(btDbvtVolume) - vol; - for (i = 0, ni = m_nodes.size(); i < ni; ++i) - { - Node& n = m_nodes[i]; - vol = btDbvtVolume::FromCR(n.m_x, m_sst.radmrg); - m_ndbvt.update(n.m_leaf, - vol, - n.m_v * m_sst.velmrg, - m_sst.updmrg); - } - /* Faces */ - if (!m_fdbvt.empty()) - { - for (int i = 0; i < m_faces.size(); ++i) - { - Face& f = m_faces[i]; - const btVector3 v = (f.m_n[0]->m_v + - f.m_n[1]->m_v + - f.m_n[2]->m_v) / - 3; - vol = VolumeOf(f, m_sst.radmrg); - m_fdbvt.update(f.m_leaf, - vol, - v * m_sst.velmrg, - m_sst.updmrg); - } - } - /* Pose */ - updatePose(); - /* Match */ - if (m_pose.m_bframe && (m_cfg.kMT > 0)) - { - const btMatrix3x3 posetrs = m_pose.m_rot; - for (int i = 0, ni = m_nodes.size(); i < ni; ++i) - { - Node& n = m_nodes[i]; - if (n.m_im > 0) - { - const btVector3 x = posetrs * m_pose.m_pos[i] + m_pose.m_com; - n.m_x = Lerp(n.m_x, x, m_cfg.kMT); - } - } - } - /* Clear contacts */ - m_rcontacts.resize(0); - m_scontacts.resize(0); - /* Optimize dbvt's */ - m_ndbvt.optimizeIncremental(1); - m_fdbvt.optimizeIncremental(1); - m_cdbvt.optimizeIncremental(1); -} + int i, ni; + /* Update */ + if (m_bUpdateRtCst) + { + m_bUpdateRtCst = false; + updateConstants(); + m_fdbvt.clear(); + if (m_cfg.collisions & fCollision::VF_SS) + { + initializeFaceTree(); + } + } + + /* Prepare */ + m_sst.sdt = dt * m_cfg.timescale; + m_sst.isdt = 1 / m_sst.sdt; + m_sst.velmrg = m_sst.sdt * 3; + m_sst.radmrg = getCollisionShape()->getMargin(); + m_sst.updmrg = m_sst.radmrg * (btScalar)0.25; + /* Forces */ + addVelocity(m_worldInfo->m_gravity * m_sst.sdt); + applyForces(); + /* Integrate */ + for (i = 0, ni = m_nodes.size(); i < ni; ++i) + { + Node& n = m_nodes[i]; + n.m_q = n.m_x; + btVector3 deltaV = n.m_f * n.m_im * m_sst.sdt; + { + btScalar maxDisplacement = m_worldInfo->m_maxDisplacement; + btScalar clampDeltaV = maxDisplacement / m_sst.sdt; + for (int c = 0; c < 3; c++) + { + if (deltaV[c] > clampDeltaV) + { + deltaV[c] = clampDeltaV; + } + if (deltaV[c] < -clampDeltaV) + { + deltaV[c] = -clampDeltaV; + } + } + } + n.m_v += deltaV; + n.m_x += n.m_v * m_sst.sdt; + n.m_f = btVector3(0, 0, 0); + } + /* Clusters */ + updateClusters(); + /* Bounds */ + updateBounds(); + /* Nodes */ + ATTRIBUTE_ALIGNED16(btDbvtVolume) + vol; + for (i = 0, ni = m_nodes.size(); i < ni; ++i) + { + Node& n = m_nodes[i]; + vol = btDbvtVolume::FromCR(n.m_x, m_sst.radmrg); + m_ndbvt.update(n.m_leaf, + vol, + n.m_v * m_sst.velmrg, + m_sst.updmrg); + } + /* Faces */ + if (!m_fdbvt.empty()) + { + for (int i = 0; i < m_faces.size(); ++i) + { + Face& f = m_faces[i]; + const btVector3 v = (f.m_n[0]->m_v + + f.m_n[1]->m_v + + f.m_n[2]->m_v) / + 3; + vol = VolumeOf(f, m_sst.radmrg); + m_fdbvt.update(f.m_leaf, + vol, + v * m_sst.velmrg, + m_sst.updmrg); + } + } + /* Pose */ + updatePose(); + /* Match */ + if (m_pose.m_bframe && (m_cfg.kMT > 0)) + { + const btMatrix3x3 posetrs = m_pose.m_rot; + for (int i = 0, ni = m_nodes.size(); i < ni; ++i) + { + Node& n = m_nodes[i]; + if (n.m_im > 0) + { + const btVector3 x = posetrs * m_pose.m_pos[i] + m_pose.m_com; + n.m_x = Lerp(n.m_x, x, m_cfg.kMT); + } + } + } + /* Clear contacts */ + m_rcontacts.resize(0); + m_scontacts.resize(0); + /* Optimize dbvt's */ + m_ndbvt.optimizeIncremental(1); + m_fdbvt.optimizeIncremental(1); + m_cdbvt.optimizeIncremental(1); +} // void btSoftBody::solveConstraints() @@ -2534,12 +2557,12 @@ int btSoftBody::rayTest(const btVector3& rayFrom, const btVector3& rayTo, } int btSoftBody::rayFaceTest(const btVector3& rayFrom, const btVector3& rayTo, - btScalar& mint, int& index) const + btScalar& mint, int& index) const { int cnt = 0; { /* Use dbvt */ RayFromToCaster collider(rayFrom, rayTo, mint); - + btDbvt::rayTest(m_fdbvt.m_root, rayFrom, rayTo, collider); if (collider.m_face) { @@ -2551,7 +2574,6 @@ int btSoftBody::rayFaceTest(const btVector3& rayFrom, const btVector3& rayTo, return (cnt); } - // static inline btDbvntNode* copyToDbvnt(const btDbvtNode* n) { @@ -2580,7 +2602,7 @@ static inline void calculateNormalCone(btDbvntNode* root) } else { - btVector3 n0(0,0,0), n1(0,0,0); + btVector3 n0(0, 0, 0), n1(0, 0, 0); btScalar a0 = 0, a1 = 0; if (root->childs[0]) { @@ -2594,8 +2616,8 @@ static inline void calculateNormalCone(btDbvntNode* root) n1 = root->childs[1]->normal; a1 = root->childs[1]->angle; } - root->normal = (n0+n1).safeNormalize(); - root->angle = btMax(a0,a1) + btAngle(n0, n1)*0.5; + root->normal = (n0 + n1).safeNormalize(); + root->angle = btMax(a0, a1) + btAngle(n0, n1) * 0.5; } } @@ -2609,7 +2631,8 @@ void btSoftBody::initializeFaceTree() for (int i = 0; i < m_faces.size(); ++i) { Face& f = m_faces[i]; - ATTRIBUTE_ALIGNED16(btDbvtVolume) vol = VolumeOf(f, 0); + ATTRIBUTE_ALIGNED16(btDbvtVolume) + vol = VolumeOf(f, 0); btDbvtNode* node = new (btAlignedAlloc(sizeof(btDbvtNode), 16)) btDbvtNode(); node->parent = NULL; node->data = &f; @@ -2623,7 +2646,7 @@ void btSoftBody::initializeFaceTree() // construct the adjacency list for triangles for (int i = 0; i < adj.size(); ++i) { - for (int j = i+1; j < adj.size(); ++j) + for (int j = i + 1; j < adj.size(); ++j) { int dup = 0; for (int k = 0; k < 3; ++k) @@ -2661,7 +2684,8 @@ void btSoftBody::rebuildNodeTree() for (int i = 0; i < m_nodes.size(); ++i) { Node& n = m_nodes[i]; - ATTRIBUTE_ALIGNED16(btDbvtVolume) vol = btDbvtVolume::FromCR(n.m_x, 0); + ATTRIBUTE_ALIGNED16(btDbvtVolume) + vol = btDbvtVolume::FromCR(n.m_x, 0); btDbvtNode* node = new (btAlignedAlloc(sizeof(btDbvtNode), 16)) btDbvtNode(); node->parent = NULL; node->data = &n; @@ -2704,61 +2728,61 @@ btVector3 btSoftBody::evaluateCom() const } bool btSoftBody::checkContact(const btCollisionObjectWrapper* colObjWrap, - const btVector3& x, - btScalar margin, - btSoftBody::sCti& cti) const -{ - btVector3 nrm; - const btCollisionShape* shp = colObjWrap->getCollisionShape(); - // const btRigidBody *tmpRigid = btRigidBody::upcast(colObjWrap->getCollisionObject()); - //const btTransform &wtr = tmpRigid ? tmpRigid->getWorldTransform() : colObjWrap->getWorldTransform(); - const btTransform& wtr = colObjWrap->getWorldTransform(); - //todo: check which transform is needed here - - btScalar dst = - m_worldInfo->m_sparsesdf.Evaluate( - wtr.invXform(x), - shp, - nrm, - margin); - if (dst < 0) - { - cti.m_colObj = colObjWrap->getCollisionObject(); - cti.m_normal = wtr.getBasis() * nrm; - cti.m_offset = -btDot(cti.m_normal, x - cti.m_normal * dst); - return (true); - } - return (false); + const btVector3& x, + btScalar margin, + btSoftBody::sCti& cti) const +{ + btVector3 nrm; + const btCollisionShape* shp = colObjWrap->getCollisionShape(); + // const btRigidBody *tmpRigid = btRigidBody::upcast(colObjWrap->getCollisionObject()); + //const btTransform &wtr = tmpRigid ? tmpRigid->getWorldTransform() : colObjWrap->getWorldTransform(); + const btTransform& wtr = colObjWrap->getWorldTransform(); + //todo: check which transform is needed here + + btScalar dst = + m_worldInfo->m_sparsesdf.Evaluate( + wtr.invXform(x), + shp, + nrm, + margin); + if (dst < 0) + { + cti.m_colObj = colObjWrap->getCollisionObject(); + cti.m_normal = wtr.getBasis() * nrm; + cti.m_offset = -btDot(cti.m_normal, x - cti.m_normal * dst); + return (true); + } + return (false); } // bool btSoftBody::checkDeformableContact(const btCollisionObjectWrapper* colObjWrap, - const btVector3& x, - btScalar margin, - btSoftBody::sCti& cti, bool predict) const + const btVector3& x, + btScalar margin, + btSoftBody::sCti& cti, bool predict) const { btVector3 nrm; const btCollisionShape* shp = colObjWrap->getCollisionShape(); - const btCollisionObject* tmpCollisionObj = colObjWrap->getCollisionObject(); - // use the position x_{n+1}^* = x_n + dt * v_{n+1}^* where v_{n+1}^* = v_n + dtg for collision detect - // but resolve contact at x_n - btTransform wtr = (predict) ? - (colObjWrap->m_preTransform != NULL ? tmpCollisionObj->getInterpolationWorldTransform()*(*colObjWrap->m_preTransform) : tmpCollisionObj->getInterpolationWorldTransform()) - : colObjWrap->getWorldTransform(); + const btCollisionObject* tmpCollisionObj = colObjWrap->getCollisionObject(); + // use the position x_{n+1}^* = x_n + dt * v_{n+1}^* where v_{n+1}^* = v_n + dtg for collision detect + // but resolve contact at x_n + btTransform wtr = (predict) ? (colObjWrap->m_preTransform != NULL ? tmpCollisionObj->getInterpolationWorldTransform() * (*colObjWrap->m_preTransform) : tmpCollisionObj->getInterpolationWorldTransform()) + : colObjWrap->getWorldTransform(); btScalar dst = m_worldInfo->m_sparsesdf.Evaluate( wtr.invXform(x), shp, nrm, margin); + if (!predict) { cti.m_colObj = colObjWrap->getCollisionObject(); cti.m_normal = wtr.getBasis() * nrm; - cti.m_offset = dst; + cti.m_offset = dst; } - if (dst < 0) - return true; + if (dst < 0) + return true; return (false); } @@ -2767,175 +2791,131 @@ bool btSoftBody::checkDeformableContact(const btCollisionObjectWrapper* colObjWr // point p with respect to triangle (a, b, c) static void getBarycentric(const btVector3& p, btVector3& a, btVector3& b, btVector3& c, btVector3& bary) { - btVector3 v0 = b - a, v1 = c - a, v2 = p - a; - btScalar d00 = v0.dot(v0); - btScalar d01 = v0.dot(v1); - btScalar d11 = v1.dot(v1); - btScalar d20 = v2.dot(v0); - btScalar d21 = v2.dot(v1); - btScalar denom = d00 * d11 - d01 * d01; - bary.setY((d11 * d20 - d01 * d21) / denom); - bary.setZ((d00 * d21 - d01 * d20) / denom); - bary.setX(btScalar(1) - bary.getY() - bary.getZ()); + btVector3 v0 = b - a, v1 = c - a, v2 = p - a; + btScalar d00 = v0.dot(v0); + btScalar d01 = v0.dot(v1); + btScalar d11 = v1.dot(v1); + btScalar d20 = v2.dot(v0); + btScalar d21 = v2.dot(v1); + btScalar denom = d00 * d11 - d01 * d01; + bary.setY((d11 * d20 - d01 * d21) / denom); + bary.setZ((d00 * d21 - d01 * d20) / denom); + bary.setX(btScalar(1) - bary.getY() - bary.getZ()); } // bool btSoftBody::checkDeformableFaceContact(const btCollisionObjectWrapper* colObjWrap, - Face& f, - btVector3& contact_point, - btVector3& bary, - btScalar margin, - btSoftBody::sCti& cti, bool predict) const -{ - btVector3 nrm; - const btCollisionShape* shp = colObjWrap->getCollisionShape(); - const btCollisionObject* tmpCollisionObj = colObjWrap->getCollisionObject(); - // use the position x_{n+1}^* = x_n + dt * v_{n+1}^* where v_{n+1}^* = v_n + dtg for collision detect - // but resolve contact at x_n - btTransform wtr = (predict) ? - (colObjWrap->m_preTransform != NULL ? tmpCollisionObj->getInterpolationWorldTransform()*(*colObjWrap->m_preTransform) : tmpCollisionObj->getInterpolationWorldTransform()) - : colObjWrap->getWorldTransform(); - btScalar dst; - -//#define USE_QUADRATURE 1 -//#define CACHE_PREV_COLLISION - - // use the contact position of the previous collision -#ifdef CACHE_PREV_COLLISION - if (f.m_pcontact[3] != 0) - { - for (int i = 0; i < 3; ++i) - bary[i] = f.m_pcontact[i]; - contact_point = BaryEval(f.m_n[0]->m_x, f.m_n[1]->m_x, f.m_n[2]->m_x, bary); - dst = m_worldInfo->m_sparsesdf.Evaluate( - wtr.invXform(contact_point), - shp, - nrm, - margin); - nrm = wtr.getBasis() * nrm; - cti.m_colObj = colObjWrap->getCollisionObject(); - // use cached contact point - } - else - { - btGjkEpaSolver2::sResults results; - btTransform triangle_transform; - triangle_transform.setIdentity(); - triangle_transform.setOrigin(f.m_n[0]->m_x); - btTriangleShape triangle(btVector3(0,0,0), f.m_n[1]->m_x-f.m_n[0]->m_x, f.m_n[2]->m_x-f.m_n[0]->m_x); - btVector3 guess(0,0,0); - const btConvexShape* csh = static_cast<const btConvexShape*>(shp); - btGjkEpaSolver2::SignedDistance(&triangle, triangle_transform, csh, wtr, guess, results); - dst = results.distance - margin; - contact_point = results.witnesses[0]; - getBarycentric(contact_point, f.m_n[0]->m_x, f.m_n[1]->m_x, f.m_n[2]->m_x, bary); - nrm = results.normal; - cti.m_colObj = colObjWrap->getCollisionObject(); - for (int i = 0; i < 3; ++i) - f.m_pcontact[i] = bary[i]; - } - return (dst < 0); -#endif + Face& f, + btVector3& contact_point, + btVector3& bary, + btScalar margin, + btSoftBody::sCti& cti, bool predict) const +{ + btVector3 nrm; + const btCollisionShape* shp = colObjWrap->getCollisionShape(); + const btCollisionObject* tmpCollisionObj = colObjWrap->getCollisionObject(); + // use the position x_{n+1}^* = x_n + dt * v_{n+1}^* where v_{n+1}^* = v_n + dtg for collision detect + // but resolve contact at x_n + btTransform wtr = (predict) ? (colObjWrap->m_preTransform != NULL ? tmpCollisionObj->getInterpolationWorldTransform() * (*colObjWrap->m_preTransform) : tmpCollisionObj->getInterpolationWorldTransform()) + : colObjWrap->getWorldTransform(); + btScalar dst; + btGjkEpaSolver2::sResults results; + +// #define USE_QUADRATURE 1 - // use collision quadrature point + // use collision quadrature point #ifdef USE_QUADRATURE - { - dst = SIMD_INFINITY; - btVector3 local_nrm; - for (int q = 0; q < m_quads.size(); ++q) - { - btVector3 p; - if (predict) - p = BaryEval(f.m_n[0]->m_q, f.m_n[1]->m_q, f.m_n[2]->m_q, m_quads[q]); - else - p = BaryEval(f.m_n[0]->m_x, f.m_n[1]->m_x, f.m_n[2]->m_x, m_quads[q]); - btScalar local_dst = m_worldInfo->m_sparsesdf.Evaluate( - wtr.invXform(p), - shp, - local_nrm, - margin); - if (local_dst < dst) - { - if (local_dst < 0 && predict) - return true; - dst = local_dst; - contact_point = p; - bary = m_quads[q]; - nrm = local_nrm; - } - if (!predict) - { - cti.m_colObj = colObjWrap->getCollisionObject(); - cti.m_normal = wtr.getBasis() * nrm; - cti.m_offset = dst; - } - } - return (dst < 0); - } + { + dst = SIMD_INFINITY; + btVector3 local_nrm; + for (int q = 0; q < m_quads.size(); ++q) + { + btVector3 p; + if (predict) + p = BaryEval(f.m_n[0]->m_q, f.m_n[1]->m_q, f.m_n[2]->m_q, m_quads[q]); + else + p = BaryEval(f.m_n[0]->m_x, f.m_n[1]->m_x, f.m_n[2]->m_x, m_quads[q]); + btScalar local_dst = m_worldInfo->m_sparsesdf.Evaluate( + wtr.invXform(p), + shp, + local_nrm, + margin); + if (local_dst < dst) + { + if (local_dst < 0 && predict) + return true; + dst = local_dst; + contact_point = p; + bary = m_quads[q]; + nrm = local_nrm; + } + if (!predict) + { + cti.m_colObj = colObjWrap->getCollisionObject(); + cti.m_normal = wtr.getBasis() * nrm; + cti.m_offset = dst; + } + } + return (dst < 0); + } #endif - -// // regular face contact -// { -// btGjkEpaSolver2::sResults results; -// btTransform triangle_transform; -// triangle_transform.setIdentity(); -// triangle_transform.setOrigin(f.m_n[0]->m_x); -// btTriangleShape triangle(btVector3(0,0,0), f.m_n[1]->m_x-f.m_n[0]->m_x, f.m_n[2]->m_x-f.m_n[0]->m_x); -// btVector3 guess(0,0,0); -// if (predict) -// { -// triangle_transform.setOrigin(f.m_n[0]->m_q); -// triangle = btTriangleShape(btVector3(0,0,0), f.m_n[1]->m_q-f.m_n[0]->m_q, f.m_n[2]->m_q-f.m_n[0]->m_q); -// } -// const btConvexShape* csh = static_cast<const btConvexShape*>(shp); -//// btGjkEpaSolver2::SignedDistance(&triangle, triangle_transform, csh, wtr, guess, results); -//// dst = results.distance - margin; -//// contact_point = results.witnesses[0]; -// btGjkEpaSolver2::Penetration(&triangle, triangle_transform, csh, wtr, guess, results); -// if (results.status == btGjkEpaSolver2::sResults::Separated) -// return false; -// dst = results.distance - margin; -// contact_point = results.witnesses[1]; -// getBarycentric(contact_point, f.m_n[0]->m_x, f.m_n[1]->m_x, f.m_n[2]->m_x, bary); -// nrm = results.normal; -// for (int i = 0; i < 3; ++i) -// f.m_pcontact[i] = bary[i]; -// } -// -// if (!predict) -// { -// cti.m_colObj = colObjWrap->getCollisionObject(); -// cti.m_normal = nrm; -// cti.m_offset = dst; -// } -// - - // regular face contact - { - btGjkEpaSolver2::sResults results; - btTransform triangle_transform; - triangle_transform.setIdentity(); - triangle_transform.setOrigin(f.m_n[0]->m_q); - btTriangleShape triangle(btVector3(0,0,0), f.m_n[1]->m_q-f.m_n[0]->m_q, f.m_n[2]->m_q-f.m_n[0]->m_q); - btVector3 guess(0,0,0); - const btConvexShape* csh = static_cast<const btConvexShape*>(shp); - btGjkEpaSolver2::SignedDistance(&triangle, triangle_transform, csh, wtr, guess, results); - dst = results.distance-csh->getMargin(); - dst -= margin; - if (dst >= 0) - return false; - contact_point = results.witnesses[0]; - getBarycentric(contact_point, f.m_n[0]->m_q, f.m_n[1]->m_q, f.m_n[2]->m_q, bary); - btVector3 curr = BaryEval(f.m_n[0]->m_x, f.m_n[1]->m_x, f.m_n[2]->m_x, bary); - nrm = results.normal; - cti.m_colObj = colObjWrap->getCollisionObject(); - cti.m_normal = nrm; - cti.m_offset = dst + (curr - contact_point).dot(nrm); - } - return (dst < 0); + + // collision detection using x* + btTransform triangle_transform; + triangle_transform.setIdentity(); + triangle_transform.setOrigin(f.m_n[0]->m_q); + btTriangleShape triangle(btVector3(0, 0, 0), f.m_n[1]->m_q - f.m_n[0]->m_q, f.m_n[2]->m_q - f.m_n[0]->m_q); + btVector3 guess(0, 0, 0); + const btConvexShape* csh = static_cast<const btConvexShape*>(shp); + btGjkEpaSolver2::SignedDistance(&triangle, triangle_transform, csh, wtr, guess, results); + dst = results.distance - 2.0 * csh->getMargin() - margin; // margin padding so that the distance = the actual distance between face and rigid - margin of rigid - margin of deformable + if (dst >= 0) + return false; + + // Use consistent barycenter to recalculate distance. + if (this->m_cacheBarycenter) + { + if (f.m_pcontact[3] != 0) + { + for (int i = 0; i < 3; ++i) + bary[i] = f.m_pcontact[i]; + contact_point = BaryEval(f.m_n[0]->m_x, f.m_n[1]->m_x, f.m_n[2]->m_x, bary); + const btConvexShape* csh = static_cast<const btConvexShape*>(shp); + btGjkEpaSolver2::SignedDistance(contact_point, margin, csh, wtr, results); + cti.m_colObj = colObjWrap->getCollisionObject(); + dst = results.distance; + cti.m_normal = results.normal; + cti.m_offset = dst; + + //point-convex CD + wtr = colObjWrap->getWorldTransform(); + btTriangleShape triangle2(btVector3(0, 0, 0), f.m_n[1]->m_x - f.m_n[0]->m_x, f.m_n[2]->m_x - f.m_n[0]->m_x); + triangle_transform.setOrigin(f.m_n[0]->m_x); + btGjkEpaSolver2::SignedDistance(&triangle2, triangle_transform, csh, wtr, guess, results); + + dst = results.distance - csh->getMargin() - margin; + return true; + } + } + + // Use triangle-convex CD. + wtr = colObjWrap->getWorldTransform(); + btTriangleShape triangle2(btVector3(0, 0, 0), f.m_n[1]->m_x - f.m_n[0]->m_x, f.m_n[2]->m_x - f.m_n[0]->m_x); + triangle_transform.setOrigin(f.m_n[0]->m_x); + btGjkEpaSolver2::SignedDistance(&triangle2, triangle_transform, csh, wtr, guess, results); + contact_point = results.witnesses[0]; + getBarycentric(contact_point, f.m_n[0]->m_x, f.m_n[1]->m_x, f.m_n[2]->m_x, bary); + + for (int i = 0; i < 3; ++i) + f.m_pcontact[i] = bary[i]; + + dst = results.distance - csh->getMargin() - margin; + cti.m_colObj = colObjWrap->getCollisionObject(); + cti.m_normal = results.normal; + cti.m_offset = dst; + return true; } -// void btSoftBody::updateNormals() { const btVector3 zv(0, 0, 0); @@ -2979,63 +2959,63 @@ void btSoftBody::updateBounds() m_bounds[1] = btVector3(1000, 1000, 1000); } else {*/ -// if (m_ndbvt.m_root) -// { -// const btVector3& mins = m_ndbvt.m_root->volume.Mins(); -// const btVector3& maxs = m_ndbvt.m_root->volume.Maxs(); -// const btScalar csm = getCollisionShape()->getMargin(); -// const btVector3 mrg = btVector3(csm, -// csm, -// csm) * -// 1; // ??? to investigate... -// m_bounds[0] = mins - mrg; -// m_bounds[1] = maxs + mrg; -// if (0 != getBroadphaseHandle()) -// { -// m_worldInfo->m_broadphase->setAabb(getBroadphaseHandle(), -// m_bounds[0], -// m_bounds[1], -// m_worldInfo->m_dispatcher); -// } -// } -// else -// { -// m_bounds[0] = -// m_bounds[1] = btVector3(0, 0, 0); -// } - if (m_nodes.size()) - { - btVector3 mins = m_nodes[0].m_x; - btVector3 maxs = m_nodes[0].m_x; - for (int i = 1; i < m_nodes.size(); ++i) - { - for (int d = 0; d < 3; ++d) - { - if (m_nodes[i].m_x[d] > maxs[d]) - maxs[d] = m_nodes[i].m_x[d]; - if (m_nodes[i].m_x[d] < mins[d]) - mins[d] = m_nodes[i].m_x[d]; - } - } - const btScalar csm = getCollisionShape()->getMargin(); - const btVector3 mrg = btVector3(csm, - csm, - csm); - m_bounds[0] = mins - mrg; - m_bounds[1] = maxs + mrg; - if (0 != getBroadphaseHandle()) - { - m_worldInfo->m_broadphase->setAabb(getBroadphaseHandle(), - m_bounds[0], - m_bounds[1], - m_worldInfo->m_dispatcher); - } - } - else - { - m_bounds[0] = - m_bounds[1] = btVector3(0, 0, 0); - } + // if (m_ndbvt.m_root) + // { + // const btVector3& mins = m_ndbvt.m_root->volume.Mins(); + // const btVector3& maxs = m_ndbvt.m_root->volume.Maxs(); + // const btScalar csm = getCollisionShape()->getMargin(); + // const btVector3 mrg = btVector3(csm, + // csm, + // csm) * + // 1; // ??? to investigate... + // m_bounds[0] = mins - mrg; + // m_bounds[1] = maxs + mrg; + // if (0 != getBroadphaseHandle()) + // { + // m_worldInfo->m_broadphase->setAabb(getBroadphaseHandle(), + // m_bounds[0], + // m_bounds[1], + // m_worldInfo->m_dispatcher); + // } + // } + // else + // { + // m_bounds[0] = + // m_bounds[1] = btVector3(0, 0, 0); + // } + if (m_nodes.size()) + { + btVector3 mins = m_nodes[0].m_x; + btVector3 maxs = m_nodes[0].m_x; + for (int i = 1; i < m_nodes.size(); ++i) + { + for (int d = 0; d < 3; ++d) + { + if (m_nodes[i].m_x[d] > maxs[d]) + maxs[d] = m_nodes[i].m_x[d]; + if (m_nodes[i].m_x[d] < mins[d]) + mins[d] = m_nodes[i].m_x[d]; + } + } + const btScalar csm = getCollisionShape()->getMargin(); + const btVector3 mrg = btVector3(csm, + csm, + csm); + m_bounds[0] = mins - mrg; + m_bounds[1] = maxs + mrg; + if (0 != getBroadphaseHandle()) + { + m_worldInfo->m_broadphase->setAabb(getBroadphaseHandle(), + m_bounds[0], + m_bounds[1], + m_worldInfo->m_dispatcher); + } + } + else + { + m_bounds[0] = + m_bounds[1] = btVector3(0, 0, 0); + } } // @@ -3454,60 +3434,120 @@ void btSoftBody::dampClusters() void btSoftBody::setSpringStiffness(btScalar k) { - for (int i = 0; i < m_links.size(); ++i) - { - m_links[i].Feature::m_material->m_kLST = k; - } - m_repulsionStiffness = k; + for (int i = 0; i < m_links.size(); ++i) + { + m_links[i].Feature::m_material->m_kLST = k; + } + m_repulsionStiffness = k; +} + +void btSoftBody::setGravityFactor(btScalar gravFactor) +{ + m_gravityFactor = gravFactor; +} + +void btSoftBody::setCacheBarycenter(bool cacheBarycenter) +{ + m_cacheBarycenter = cacheBarycenter; } void btSoftBody::initializeDmInverse() { - btScalar unit_simplex_measure = 1./6.; - - for (int i = 0; i < m_tetras.size(); ++i) - { - Tetra &t = m_tetras[i]; - btVector3 c1 = t.m_n[1]->m_x - t.m_n[0]->m_x; - btVector3 c2 = t.m_n[2]->m_x - t.m_n[0]->m_x; - btVector3 c3 = t.m_n[3]->m_x - t.m_n[0]->m_x; - btMatrix3x3 Dm(c1.getX(), c2.getX(), c3.getX(), - c1.getY(), c2.getY(), c3.getY(), - c1.getZ(), c2.getZ(), c3.getZ()); - t.m_element_measure = Dm.determinant() * unit_simplex_measure; - t.m_Dm_inverse = Dm.inverse(); - } + btScalar unit_simplex_measure = 1. / 6.; + + for (int i = 0; i < m_tetras.size(); ++i) + { + Tetra& t = m_tetras[i]; + btVector3 c1 = t.m_n[1]->m_x - t.m_n[0]->m_x; + btVector3 c2 = t.m_n[2]->m_x - t.m_n[0]->m_x; + btVector3 c3 = t.m_n[3]->m_x - t.m_n[0]->m_x; + btMatrix3x3 Dm(c1.getX(), c2.getX(), c3.getX(), + c1.getY(), c2.getY(), c3.getY(), + c1.getZ(), c2.getZ(), c3.getZ()); + t.m_element_measure = Dm.determinant() * unit_simplex_measure; + t.m_Dm_inverse = Dm.inverse(); + + // calculate the first three columns of P^{-1} + btVector3 a = t.m_n[0]->m_x; + btVector3 b = t.m_n[1]->m_x; + btVector3 c = t.m_n[2]->m_x; + btVector3 d = t.m_n[3]->m_x; + + btScalar det = 1 / (a[0] * b[1] * c[2] - a[0] * b[1] * d[2] - a[0] * b[2] * c[1] + a[0] * b[2] * d[1] + a[0] * c[1] * d[2] - a[0] * c[2] * d[1] + a[1] * (-b[0] * c[2] + b[0] * d[2] + b[2] * c[0] - b[2] * d[0] - c[0] * d[2] + c[2] * d[0]) + a[2] * (b[0] * c[1] - b[0] * d[1] + b[1] * (d[0] - c[0]) + c[0] * d[1] - c[1] * d[0]) - b[0] * c[1] * d[2] + b[0] * c[2] * d[1] + b[1] * c[0] * d[2] - b[1] * c[2] * d[0] - b[2] * c[0] * d[1] + b[2] * c[1] * d[0]); + + btScalar P11 = -b[2] * c[1] + d[2] * c[1] + b[1] * c[2] + b[2] * d[1] - c[2] * d[1] - b[1] * d[2]; + btScalar P12 = b[2] * c[0] - d[2] * c[0] - b[0] * c[2] - b[2] * d[0] + c[2] * d[0] + b[0] * d[2]; + btScalar P13 = -b[1] * c[0] + d[1] * c[0] + b[0] * c[1] + b[1] * d[0] - c[1] * d[0] - b[0] * d[1]; + btScalar P21 = a[2] * c[1] - d[2] * c[1] - a[1] * c[2] - a[2] * d[1] + c[2] * d[1] + a[1] * d[2]; + btScalar P22 = -a[2] * c[0] + d[2] * c[0] + a[0] * c[2] + a[2] * d[0] - c[2] * d[0] - a[0] * d[2]; + btScalar P23 = a[1] * c[0] - d[1] * c[0] - a[0] * c[1] - a[1] * d[0] + c[1] * d[0] + a[0] * d[1]; + btScalar P31 = -a[2] * b[1] + d[2] * b[1] + a[1] * b[2] + a[2] * d[1] - b[2] * d[1] - a[1] * d[2]; + btScalar P32 = a[2] * b[0] - d[2] * b[0] - a[0] * b[2] - a[2] * d[0] + b[2] * d[0] + a[0] * d[2]; + btScalar P33 = -a[1] * b[0] + d[1] * b[0] + a[0] * b[1] + a[1] * d[0] - b[1] * d[0] - a[0] * d[1]; + btScalar P41 = a[2] * b[1] - c[2] * b[1] - a[1] * b[2] - a[2] * c[1] + b[2] * c[1] + a[1] * c[2]; + btScalar P42 = -a[2] * b[0] + c[2] * b[0] + a[0] * b[2] + a[2] * c[0] - b[2] * c[0] - a[0] * c[2]; + btScalar P43 = a[1] * b[0] - c[1] * b[0] - a[0] * b[1] - a[1] * c[0] + b[1] * c[0] + a[0] * c[1]; + + btVector4 p1(P11 * det, P21 * det, P31 * det, P41 * det); + btVector4 p2(P12 * det, P22 * det, P32 * det, P42 * det); + btVector4 p3(P13 * det, P23 * det, P33 * det, P43 * det); + + t.m_P_inv[0] = p1; + t.m_P_inv[1] = p2; + t.m_P_inv[2] = p3; + } +} + +static btScalar Dot4(const btVector4& a, const btVector4& b) +{ + return a[0] * b[0] + a[1] * b[1] + a[2] * b[2] + a[3] * b[3]; } void btSoftBody::updateDeformation() { - for (int i = 0; i < m_tetras.size(); ++i) - { - btSoftBody::Tetra& t = m_tetras[i]; - btVector3 c1 = t.m_n[1]->m_q - t.m_n[0]->m_q; - btVector3 c2 = t.m_n[2]->m_q - t.m_n[0]->m_q; - btVector3 c3 = t.m_n[3]->m_q - t.m_n[0]->m_q; - btMatrix3x3 Ds(c1.getX(), c2.getX(), c3.getX(), - c1.getY(), c2.getY(), c3.getY(), - c1.getZ(), c2.getZ(), c3.getZ()); - t.m_F = Ds * t.m_Dm_inverse; - - btSoftBody::TetraScratch& s = m_tetraScratches[i]; - s.m_F = t.m_F; - s.m_J = t.m_F.determinant(); - btMatrix3x3 C = t.m_F.transpose()*t.m_F; - s.m_trace = C[0].getX() + C[1].getY() + C[2].getZ(); - s.m_cofF = t.m_F.adjoint().transpose(); - } + btQuaternion q; + for (int i = 0; i < m_tetras.size(); ++i) + { + btSoftBody::Tetra& t = m_tetras[i]; + btVector3 c1 = t.m_n[1]->m_q - t.m_n[0]->m_q; + btVector3 c2 = t.m_n[2]->m_q - t.m_n[0]->m_q; + btVector3 c3 = t.m_n[3]->m_q - t.m_n[0]->m_q; + btMatrix3x3 Ds(c1.getX(), c2.getX(), c3.getX(), + c1.getY(), c2.getY(), c3.getY(), + c1.getZ(), c2.getZ(), c3.getZ()); + t.m_F = Ds * t.m_Dm_inverse; + + btSoftBody::TetraScratch& s = m_tetraScratches[i]; + s.m_F = t.m_F; + s.m_J = t.m_F.determinant(); + btMatrix3x3 C = t.m_F.transpose() * t.m_F; + s.m_trace = C[0].getX() + C[1].getY() + C[2].getZ(); + s.m_cofF = t.m_F.adjoint().transpose(); + + btVector3 a = t.m_n[0]->m_q; + btVector3 b = t.m_n[1]->m_q; + btVector3 c = t.m_n[2]->m_q; + btVector3 d = t.m_n[3]->m_q; + btVector4 q1(a[0], b[0], c[0], d[0]); + btVector4 q2(a[1], b[1], c[1], d[1]); + btVector4 q3(a[2], b[2], c[2], d[2]); + btMatrix3x3 B(Dot4(q1, t.m_P_inv[0]), Dot4(q1, t.m_P_inv[1]), Dot4(q1, t.m_P_inv[2]), + Dot4(q2, t.m_P_inv[0]), Dot4(q2, t.m_P_inv[1]), Dot4(q2, t.m_P_inv[2]), + Dot4(q3, t.m_P_inv[0]), Dot4(q3, t.m_P_inv[1]), Dot4(q3, t.m_P_inv[2])); + q.setRotation(btVector3(0, 0, 1), 0); + B.extractRotation(q, 0.01); // precision of the rotation is not very important for visual correctness. + btMatrix3x3 Q(q); + s.m_corotation = Q; + } } void btSoftBody::advanceDeformation() { - updateDeformation(); - for (int i = 0; i < m_tetras.size(); ++i) - { - m_tetraScratchesTn[i] = m_tetraScratches[i]; - } + updateDeformation(); + for (int i = 0; i < m_tetras.size(); ++i) + { + m_tetraScratchesTn[i] = m_tetraScratches[i]; + } } // void btSoftBody::Joint::Prepare(btScalar dt, int) @@ -3750,7 +3790,7 @@ void btSoftBody::applyForces() // void btSoftBody::setMaxStress(btScalar maxStress) { - m_cfg.m_maxStress = maxStress; + m_cfg.m_maxStress = maxStress; } // @@ -3765,7 +3805,7 @@ void btSoftBody::interpolateRenderMesh() const Node* p2 = m_renderNodesParents[i][2]; btVector3 normal = btCross(p1->m_x - p0->m_x, p2->m_x - p0->m_x); btVector3 unit_normal = normal.normalized(); - Node& n = m_renderNodes[i]; + RenderNode& n = m_renderNodes[i]; n.m_x.setZero(); for (int j = 0; j < 3; ++j) { @@ -3778,7 +3818,7 @@ void btSoftBody::interpolateRenderMesh() { for (int i = 0; i < m_renderNodes.size(); ++i) { - Node& n = m_renderNodes[i]; + RenderNode& n = m_renderNodes[i]; n.m_x.setZero(); for (int j = 0; j < 4; ++j) { @@ -3793,13 +3833,13 @@ void btSoftBody::interpolateRenderMesh() void btSoftBody::setCollisionQuadrature(int N) { - for (int i = 0; i <= N; ++i) - { - for (int j = 0; i+j <= N; ++j) - { - m_quads.push_back(btVector3(btScalar(i)/btScalar(N), btScalar(j)/btScalar(N), btScalar(N-i-j)/btScalar(N))); - } - } + for (int i = 0; i <= N; ++i) + { + for (int j = 0; i + j <= N; ++j) + { + m_quads.push_back(btVector3(btScalar(i) / btScalar(N), btScalar(j) / btScalar(N), btScalar(N - i - j) / btScalar(N))); + } + } } // @@ -4006,12 +4046,12 @@ btSoftBody::vsolver_t btSoftBody::getSolver(eVSolver::_ solver) void btSoftBody::setSelfCollision(bool useSelfCollision) { - m_useSelfCollision = useSelfCollision; + m_useSelfCollision = useSelfCollision; } bool btSoftBody::useSelfCollision() { - return m_useSelfCollision; + return m_useSelfCollision; } // @@ -4052,23 +4092,23 @@ void btSoftBody::defaultCollisionHandler(const btCollisionObjectWrapper* pcoWrap collider.ProcessColObj(this, pcoWrap); } break; - case fCollision::SDF_RD: - { - btRigidBody* prb1 = (btRigidBody*)btRigidBody::upcast(pcoWrap->getCollisionObject()); - if (pcoWrap->getCollisionObject()->isActive() || this->isActive()) - { - const btTransform wtr = pcoWrap->getWorldTransform(); - const btScalar timemargin = 0; - const btScalar basemargin = getCollisionShape()->getMargin(); - btVector3 mins; - btVector3 maxs; - ATTRIBUTE_ALIGNED16(btDbvtVolume) - volume; - pcoWrap->getCollisionShape()->getAabb(wtr, - mins, - maxs); - volume = btDbvtVolume::FromMM(mins, maxs); - volume.Expand(btVector3(basemargin, basemargin, basemargin)); + case fCollision::SDF_RD: + { + btRigidBody* prb1 = (btRigidBody*)btRigidBody::upcast(pcoWrap->getCollisionObject()); + if (pcoWrap->getCollisionObject()->isActive() || this->isActive()) + { + const btTransform wtr = pcoWrap->getWorldTransform(); + const btScalar timemargin = 0; + const btScalar basemargin = getCollisionShape()->getMargin(); + btVector3 mins; + btVector3 maxs; + ATTRIBUTE_ALIGNED16(btDbvtVolume) + volume; + pcoWrap->getCollisionShape()->getAabb(wtr, + mins, + maxs); + volume = btDbvtVolume::FromMM(mins, maxs); + volume.Expand(btVector3(basemargin, basemargin, basemargin)); if (m_cfg.collisions & fCollision::SDF_RDN) { btSoftColliders::CollideSDF_RD docollideNode; @@ -4080,26 +4120,26 @@ void btSoftBody::defaultCollisionHandler(const btCollisionObjectWrapper* pcoWrap m_ndbvt.collideTV(m_ndbvt.m_root, volume, docollideNode); } - if (((pcoWrap->getCollisionObject()->getInternalType() == CO_RIGID_BODY) && (m_cfg.collisions & fCollision::SDF_RDF)) || ((pcoWrap->getCollisionObject()->getInternalType() == CO_FEATHERSTONE_LINK) && (m_cfg.collisions & fCollision::SDF_MDF))) - { - btSoftColliders::CollideSDF_RDF docollideFace; - docollideFace.psb = this; - docollideFace.m_colObj1Wrap = pcoWrap; - docollideFace.m_rigidBody = prb1; + if (((pcoWrap->getCollisionObject()->getInternalType() == CO_RIGID_BODY) && (m_cfg.collisions & fCollision::SDF_RDF)) || ((pcoWrap->getCollisionObject()->getInternalType() == CO_FEATHERSTONE_LINK) && (m_cfg.collisions & fCollision::SDF_MDF))) + { + btSoftColliders::CollideSDF_RDF docollideFace; + docollideFace.psb = this; + docollideFace.m_colObj1Wrap = pcoWrap; + docollideFace.m_rigidBody = prb1; docollideFace.dynmargin = basemargin + timemargin; docollideFace.stamargin = basemargin; - m_fdbvt.collideTV(m_fdbvt.m_root, volume, docollideFace); - } - } - } - break; + m_fdbvt.collideTV(m_fdbvt.m_root, volume, docollideFace); + } + } + } + break; } } // void btSoftBody::defaultCollisionHandler(btSoftBody* psb) { - BT_PROFILE("Deformable Collision"); + BT_PROFILE("Deformable Collision"); const int cf = m_cfg.collisions & psb->m_cfg.collisions; switch (cf & fCollision::SVSmask) { @@ -4137,60 +4177,60 @@ void btSoftBody::defaultCollisionHandler(btSoftBody* psb) } } break; - case fCollision::VF_DD: - { - if (!psb->m_softSoftCollision) - return; - if (psb->isActive() || this->isActive()) - { - if (this != psb) - { - btSoftColliders::CollideVF_DD docollide; - /* common */ - docollide.mrg = getCollisionShape()->getMargin() + - psb->getCollisionShape()->getMargin(); - /* psb0 nodes vs psb1 faces */ - if (psb->m_tetras.size() > 0) - docollide.useFaceNormal = true; - else - docollide.useFaceNormal = false; - docollide.psb[0] = this; - docollide.psb[1] = psb; - docollide.psb[0]->m_ndbvt.collideTT(docollide.psb[0]->m_ndbvt.m_root, - docollide.psb[1]->m_fdbvt.m_root, - docollide); - - /* psb1 nodes vs psb0 faces */ - if (this->m_tetras.size() > 0) - docollide.useFaceNormal = true; - else - docollide.useFaceNormal = false; - docollide.psb[0] = psb; - docollide.psb[1] = this; - docollide.psb[0]->m_ndbvt.collideTT(docollide.psb[0]->m_ndbvt.m_root, - docollide.psb[1]->m_fdbvt.m_root, - docollide); - } - else - { - if (psb->useSelfCollision()) - { - btSoftColliders::CollideFF_DD docollide; - docollide.mrg = 2*getCollisionShape()->getMargin(); - docollide.psb[0] = this; - docollide.psb[1] = psb; - if (this->m_tetras.size() > 0) - docollide.useFaceNormal = true; - else - docollide.useFaceNormal = false; - /* psb0 faces vs psb0 faces */ - calculateNormalCone(this->m_fdbvnt); - this->m_fdbvt.selfCollideT(m_fdbvnt,docollide); - } - } - } - } - break; + case fCollision::VF_DD: + { + if (!psb->m_softSoftCollision) + return; + if (psb->isActive() || this->isActive()) + { + if (this != psb) + { + btSoftColliders::CollideVF_DD docollide; + /* common */ + docollide.mrg = getCollisionShape()->getMargin() + + psb->getCollisionShape()->getMargin(); + /* psb0 nodes vs psb1 faces */ + if (psb->m_tetras.size() > 0) + docollide.useFaceNormal = true; + else + docollide.useFaceNormal = false; + docollide.psb[0] = this; + docollide.psb[1] = psb; + docollide.psb[0]->m_ndbvt.collideTT(docollide.psb[0]->m_ndbvt.m_root, + docollide.psb[1]->m_fdbvt.m_root, + docollide); + + /* psb1 nodes vs psb0 faces */ + if (this->m_tetras.size() > 0) + docollide.useFaceNormal = true; + else + docollide.useFaceNormal = false; + docollide.psb[0] = psb; + docollide.psb[1] = this; + docollide.psb[0]->m_ndbvt.collideTT(docollide.psb[0]->m_ndbvt.m_root, + docollide.psb[1]->m_fdbvt.m_root, + docollide); + } + else + { + if (psb->useSelfCollision()) + { + btSoftColliders::CollideFF_DD docollide; + docollide.mrg = 2 * getCollisionShape()->getMargin(); + docollide.psb[0] = this; + docollide.psb[1] = psb; + if (this->m_tetras.size() > 0) + docollide.useFaceNormal = true; + else + docollide.useFaceNormal = false; + /* psb0 faces vs psb0 faces */ + calculateNormalCone(this->m_fdbvnt); + this->m_fdbvt.selfCollideT(m_fdbvnt, docollide); + } + } + } + } + break; default: { } @@ -4205,7 +4245,7 @@ void btSoftBody::geometricCollisionHandler(btSoftBody* psb) { btSoftColliders::CollideCCD docollide; /* common */ - docollide.mrg = SAFE_EPSILON; // for rounding error instead of actual margin + docollide.mrg = SAFE_EPSILON; // for rounding error instead of actual margin docollide.dt = psb->m_sst.sdt; /* psb0 nodes vs psb1 faces */ if (psb->m_tetras.size() > 0) @@ -4215,8 +4255,8 @@ void btSoftBody::geometricCollisionHandler(btSoftBody* psb) docollide.psb[0] = this; docollide.psb[1] = psb; docollide.psb[0]->m_ndbvt.collideTT(docollide.psb[0]->m_ndbvt.m_root, - docollide.psb[1]->m_fdbvt.m_root, - docollide); + docollide.psb[1]->m_fdbvt.m_root, + docollide); /* psb1 nodes vs psb0 faces */ if (this->m_tetras.size() > 0) docollide.useFaceNormal = true; @@ -4225,8 +4265,8 @@ void btSoftBody::geometricCollisionHandler(btSoftBody* psb) docollide.psb[0] = psb; docollide.psb[1] = this; docollide.psb[0]->m_ndbvt.collideTT(docollide.psb[0]->m_ndbvt.m_root, - docollide.psb[1]->m_fdbvt.m_root, - docollide); + docollide.psb[1]->m_fdbvt.m_root, + docollide); } else { @@ -4236,14 +4276,14 @@ void btSoftBody::geometricCollisionHandler(btSoftBody* psb) docollide.mrg = SAFE_EPSILON; docollide.psb[0] = this; docollide.psb[1] = psb; - docollide.dt = psb->m_sst.sdt; + docollide.dt = psb->m_sst.sdt; if (this->m_tetras.size() > 0) docollide.useFaceNormal = true; else docollide.useFaceNormal = false; /* psb0 faces vs psb0 faces */ calculateNormalCone(this->m_fdbvnt); // should compute this outside of this scope - this->m_fdbvt.selfCollideT(m_fdbvnt,docollide); + this->m_fdbvt.selfCollideT(m_fdbvnt, docollide); } } } @@ -4648,44 +4688,43 @@ const char* btSoftBody::serialize(void* dataBuffer, class btSerializer* serializ void btSoftBody::updateDeactivation(btScalar timeStep) { - if ((getActivationState() == ISLAND_SLEEPING) || (getActivationState() == DISABLE_DEACTIVATION)) - return; + if ((getActivationState() == ISLAND_SLEEPING) || (getActivationState() == DISABLE_DEACTIVATION)) + return; - if (m_maxSpeedSquared < m_sleepingThreshold * m_sleepingThreshold) - { - m_deactivationTime += timeStep; - } - else - { - m_deactivationTime = btScalar(0.); - setActivationState(0); - } + if (m_maxSpeedSquared < m_sleepingThreshold * m_sleepingThreshold) + { + m_deactivationTime += timeStep; + } + else + { + m_deactivationTime = btScalar(0.); + setActivationState(0); + } } - void btSoftBody::setZeroVelocity() { - for (int i = 0; i < m_nodes.size(); ++i) - { - m_nodes[i].m_v.setZero(); - } + for (int i = 0; i < m_nodes.size(); ++i) + { + m_nodes[i].m_v.setZero(); + } } bool btSoftBody::wantsSleeping() { - if (getActivationState() == DISABLE_DEACTIVATION) - return false; + if (getActivationState() == DISABLE_DEACTIVATION) + return false; - //disable deactivation - if (gDisableDeactivation || (gDeactivationTime == btScalar(0.))) - return false; + //disable deactivation + if (gDisableDeactivation || (gDeactivationTime == btScalar(0.))) + return false; - if ((getActivationState() == ISLAND_SLEEPING) || (getActivationState() == WANTS_DEACTIVATION)) - return true; + if ((getActivationState() == ISLAND_SLEEPING) || (getActivationState() == WANTS_DEACTIVATION)) + return true; - if (m_deactivationTime > gDeactivationTime) - { - return true; - } - return false; + if (m_deactivationTime > gDeactivationTime) + { + return true; + } + return false; } diff --git a/thirdparty/bullet/BulletSoftBody/btSoftBody.h b/thirdparty/bullet/BulletSoftBody/btSoftBody.h index 6a55eccbd2..f578487b8c 100644 --- a/thirdparty/bullet/BulletSoftBody/btSoftBody.h +++ b/thirdparty/bullet/BulletSoftBody/btSoftBody.h @@ -35,7 +35,7 @@ subject to the following restrictions: //#else #define btSoftBodyData btSoftBodyFloatData #define btSoftBodyDataName "btSoftBodyFloatData" -static const btScalar OVERLAP_REDUCTION_FACTOR = 0.1; +static const btScalar OVERLAP_REDUCTION_FACTOR = 0.1; static unsigned long seed = 243703; //#endif //BT_USE_DOUBLE_PRECISION @@ -171,10 +171,10 @@ public: CL_SELF = 0x0040, ///Cluster soft body self collision VF_DD = 0x0080, ///Vertex vs face soft vs soft handling - RVDFmask = 0x0f00, /// Rigid versus deformable face mask - SDF_RDF = 0x0100, /// GJK based Rigid vs. deformable face - SDF_MDF = 0x0200, /// GJK based Multibody vs. deformable face - SDF_RDN = 0x0400, /// SDF based Rigid vs. deformable node + RVDFmask = 0x0f00, /// Rigid versus deformable face mask + SDF_RDF = 0x0100, /// GJK based Rigid vs. deformable face + SDF_MDF = 0x0200, /// GJK based Multibody vs. deformable face + SDF_RDN = 0x0400, /// SDF based Rigid vs. deformable node /* presets */ Default = SDF_RS, END @@ -226,7 +226,7 @@ public: const btCollisionObject* m_colObj; /* Rigid body */ btVector3 m_normal; /* Outward normal */ btScalar m_offset; /* Offset from origin */ - btVector3 m_bary; /* Barycentric weights for faces */ + btVector3 m_bary; /* Barycentric weights for faces */ }; /* sMedium */ @@ -258,20 +258,29 @@ public: Material* m_material; // Material }; /* Node */ + struct RenderNode + { + btVector3 m_x; + btVector3 m_uv1; + btVector3 m_normal; + }; struct Node : Feature { btVector3 m_x; // Position btVector3 m_q; // Previous step position/Test position btVector3 m_v; // Velocity - btVector3 m_vn; // Previous step velocity + btVector3 m_vn; // Previous step velocity btVector3 m_f; // Force accumulator btVector3 m_n; // Normal btScalar m_im; // 1/mass btScalar m_area; // Area btDbvtNode* m_leaf; // Leaf data - btScalar m_penetration; // depth of penetration + int m_constrained; // depth of penetration int m_battach : 1; // Attached - int index; + int index; + btVector3 m_splitv; // velocity associated with split impulse + btMatrix3x3 m_effectiveMass; // effective mass in contact + btMatrix3x3 m_effectiveMass_inv; // inverse of effective mass }; /* Link */ ATTRIBUTE_ALIGNED16(struct) @@ -287,40 +296,47 @@ public: BT_DECLARE_ALIGNED_ALLOCATOR(); }; + struct RenderFace + { + RenderNode* m_n[3]; // Node pointers + }; + /* Face */ struct Face : Feature { - Node* m_n[3]; // Node pointers - btVector3 m_normal; // Normal - btScalar m_ra; // Rest area - btDbvtNode* m_leaf; // Leaf data - btVector4 m_pcontact; // barycentric weights of the persistent contact - btVector3 m_n0, m_n1, m_vn; - int m_index; + Node* m_n[3]; // Node pointers + btVector3 m_normal; // Normal + btScalar m_ra; // Rest area + btDbvtNode* m_leaf; // Leaf data + btVector4 m_pcontact; // barycentric weights of the persistent contact + btVector3 m_n0, m_n1, m_vn; + int m_index; }; /* Tetra */ struct Tetra : Feature { - Node* m_n[4]; // Node pointers - btScalar m_rv; // Rest volume - btDbvtNode* m_leaf; // Leaf data - btVector3 m_c0[4]; // gradients - btScalar m_c1; // (4*kVST)/(im0+im1+im2+im3) - btScalar m_c2; // m_c1/sum(|g0..3|^2) - btMatrix3x3 m_Dm_inverse; // rest Dm^-1 - btMatrix3x3 m_F; - btScalar m_element_measure; + Node* m_n[4]; // Node pointers + btScalar m_rv; // Rest volume + btDbvtNode* m_leaf; // Leaf data + btVector3 m_c0[4]; // gradients + btScalar m_c1; // (4*kVST)/(im0+im1+im2+im3) + btScalar m_c2; // m_c1/sum(|g0..3|^2) + btMatrix3x3 m_Dm_inverse; // rest Dm^-1 + btMatrix3x3 m_F; + btScalar m_element_measure; + btVector4 m_P_inv[3]; // first three columns of P_inv matrix + }; + + /* TetraScratch */ + struct TetraScratch + { + btMatrix3x3 m_F; // deformation gradient F + btScalar m_trace; // trace of F^T * F + btScalar m_J; // det(F) + btMatrix3x3 m_cofF; // cofactor of F + btMatrix3x3 m_corotation; // corotatio of the tetra }; - - /* TetraScratch */ - struct TetraScratch - { - btMatrix3x3 m_F; // deformation gradient F - btScalar m_trace; // trace of F^T * F - btScalar m_J; // det(F) - btMatrix3x3 m_cofF; // cofactor of F - }; - + /* RContact */ struct RContact { @@ -331,67 +347,68 @@ public: btScalar m_c2; // ima*dt btScalar m_c3; // Friction btScalar m_c4; // Hardness - - // jacobians and unit impulse responses for multibody - btMultiBodyJacobianData jacobianData_normal; - btMultiBodyJacobianData jacobianData_t1; - btMultiBodyJacobianData jacobianData_t2; - btVector3 t1; - btVector3 t2; + + // jacobians and unit impulse responses for multibody + btMultiBodyJacobianData jacobianData_normal; + btMultiBodyJacobianData jacobianData_t1; + btMultiBodyJacobianData jacobianData_t2; + btVector3 t1; + btVector3 t2; }; - - class DeformableRigidContact - { - public: - sCti m_cti; // Contact infos - btMatrix3x3 m_c0; // Impulse matrix - btVector3 m_c1; // Relative anchor - btScalar m_c2; // inverse mass of node/face - btScalar m_c3; // Friction - btScalar m_c4; // Hardness - - // jacobians and unit impulse responses for multibody - btMultiBodyJacobianData jacobianData_normal; - btMultiBodyJacobianData jacobianData_t1; - btMultiBodyJacobianData jacobianData_t2; - btVector3 t1; - btVector3 t2; - }; - - class DeformableNodeRigidContact : public DeformableRigidContact - { - public: - Node* m_node; // Owner node - }; - - class DeformableNodeRigidAnchor : public DeformableNodeRigidContact - { - public: - btVector3 m_local; // Anchor position in body space - }; - - class DeformableFaceRigidContact : public DeformableRigidContact - { - public: - Face* m_face; // Owner face - btVector3 m_contactPoint; // Contact point - btVector3 m_bary; // Barycentric weights - btVector3 m_weights; // v_contactPoint * m_weights[i] = m_face->m_node[i]->m_v; - }; - - struct DeformableFaceNodeContact - { - Node* m_node; // Node - Face* m_face; // Face - btVector3 m_bary; // Barycentric weights - btVector3 m_weights; // v_contactPoint * m_weights[i] = m_face->m_node[i]->m_v; - btVector3 m_normal; // Normal - btScalar m_margin; // Margin - btScalar m_friction; // Friction - btScalar m_imf; // inverse mass of the face at contact point - btScalar m_c0; // scale of the impulse matrix; - }; - + + class DeformableRigidContact + { + public: + sCti m_cti; // Contact infos + btMatrix3x3 m_c0; // Impulse matrix + btVector3 m_c1; // Relative anchor + btScalar m_c2; // inverse mass of node/face + btScalar m_c3; // Friction + btScalar m_c4; // Hardness + btMatrix3x3 m_c5; // inverse effective mass + + // jacobians and unit impulse responses for multibody + btMultiBodyJacobianData jacobianData_normal; + btMultiBodyJacobianData jacobianData_t1; + btMultiBodyJacobianData jacobianData_t2; + btVector3 t1; + btVector3 t2; + }; + + class DeformableNodeRigidContact : public DeformableRigidContact + { + public: + Node* m_node; // Owner node + }; + + class DeformableNodeRigidAnchor : public DeformableNodeRigidContact + { + public: + btVector3 m_local; // Anchor position in body space + }; + + class DeformableFaceRigidContact : public DeformableRigidContact + { + public: + Face* m_face; // Owner face + btVector3 m_contactPoint; // Contact point + btVector3 m_bary; // Barycentric weights + btVector3 m_weights; // v_contactPoint * m_weights[i] = m_face->m_node[i]->m_v; + }; + + struct DeformableFaceNodeContact + { + Node* m_node; // Node + Face* m_face; // Face + btVector3 m_bary; // Barycentric weights + btVector3 m_weights; // v_contactPoint * m_weights[i] = m_face->m_node[i]->m_v; + btVector3 m_normal; // Normal + btScalar m_margin; // Margin + btScalar m_friction; // Friction + btScalar m_imf; // inverse mass of the face at contact point + btScalar m_c0; // scale of the impulse matrix; + }; + /* SContact */ struct SContact { @@ -718,19 +735,19 @@ public: tVSolverArray m_vsequence; // Velocity solvers sequence tPSolverArray m_psequence; // Position solvers sequence tPSolverArray m_dsequence; // Drift solvers sequence - btScalar drag; // deformable air drag - btScalar m_maxStress; // Maximum principle first Piola stress + btScalar drag; // deformable air drag + btScalar m_maxStress; // Maximum principle first Piola stress }; /* SolverState */ struct SolverState { //if you add new variables, always initialize them! SolverState() - :sdt(0), - isdt(0), - velmrg(0), - radmrg(0), - updmrg(0) + : sdt(0), + isdt(0), + velmrg(0), + radmrg(0), + updmrg(0) { } btScalar sdt; // dt*timescale @@ -769,9 +786,11 @@ public: typedef btAlignedObjectArray<Cluster*> tClusterArray; typedef btAlignedObjectArray<Note> tNoteArray; typedef btAlignedObjectArray<Node> tNodeArray; + typedef btAlignedObjectArray< RenderNode> tRenderNodeArray; typedef btAlignedObjectArray<btDbvtNode*> tLeafArray; typedef btAlignedObjectArray<Link> tLinkArray; typedef btAlignedObjectArray<Face> tFaceArray; + typedef btAlignedObjectArray<RenderFace> tRenderFaceArray; typedef btAlignedObjectArray<Tetra> tTetraArray; typedef btAlignedObjectArray<Anchor> tAnchorArray; typedef btAlignedObjectArray<RContact> tRContactArray; @@ -791,40 +810,42 @@ public: btSoftBodyWorldInfo* m_worldInfo; // World info tNoteArray m_notes; // Notes tNodeArray m_nodes; // Nodes - tNodeArray m_renderNodes; // Nodes + tRenderNodeArray m_renderNodes; // Render Nodes tLinkArray m_links; // Links tFaceArray m_faces; // Faces - tFaceArray m_renderFaces; // Faces + tRenderFaceArray m_renderFaces; // Faces tTetraArray m_tetras; // Tetras - btAlignedObjectArray<TetraScratch> m_tetraScratches; - btAlignedObjectArray<TetraScratch> m_tetraScratchesTn; - tAnchorArray m_anchors; // Anchors - btAlignedObjectArray<DeformableNodeRigidAnchor> m_deformableAnchors; - tRContactArray m_rcontacts; // Rigid contacts - btAlignedObjectArray<DeformableNodeRigidContact> m_nodeRigidContacts; - btAlignedObjectArray<DeformableFaceNodeContact> m_faceNodeContacts; - btAlignedObjectArray<DeformableFaceRigidContact> m_faceRigidContacts; - tSContactArray m_scontacts; // Soft contacts - tJointArray m_joints; // Joints - tMaterialArray m_materials; // Materials - btScalar m_timeacc; // Time accumulator - btVector3 m_bounds[2]; // Spatial bounds - bool m_bUpdateRtCst; // Update runtime constants - btDbvt m_ndbvt; // Nodes tree - btDbvt m_fdbvt; // Faces tree - btDbvntNode* m_fdbvnt; // Faces tree with normals - btDbvt m_cdbvt; // Clusters tree - tClusterArray m_clusters; // Clusters - btScalar m_dampingCoefficient; // Damping Coefficient + btAlignedObjectArray<TetraScratch> m_tetraScratches; + btAlignedObjectArray<TetraScratch> m_tetraScratchesTn; + tAnchorArray m_anchors; // Anchors + btAlignedObjectArray<DeformableNodeRigidAnchor> m_deformableAnchors; + tRContactArray m_rcontacts; // Rigid contacts + btAlignedObjectArray<DeformableNodeRigidContact> m_nodeRigidContacts; + btAlignedObjectArray<DeformableFaceNodeContact> m_faceNodeContacts; + btAlignedObjectArray<DeformableFaceRigidContact> m_faceRigidContacts; + tSContactArray m_scontacts; // Soft contacts + tJointArray m_joints; // Joints + tMaterialArray m_materials; // Materials + btScalar m_timeacc; // Time accumulator + btVector3 m_bounds[2]; // Spatial bounds + bool m_bUpdateRtCst; // Update runtime constants + btDbvt m_ndbvt; // Nodes tree + btDbvt m_fdbvt; // Faces tree + btDbvntNode* m_fdbvnt; // Faces tree with normals + btDbvt m_cdbvt; // Clusters tree + tClusterArray m_clusters; // Clusters + btScalar m_dampingCoefficient; // Damping Coefficient btScalar m_sleepingThreshold; btScalar m_maxSpeedSquared; - btAlignedObjectArray<btVector3> m_quads; // quadrature points for collision detection + btAlignedObjectArray<btVector3> m_quads; // quadrature points for collision detection btScalar m_repulsionStiffness; - btAlignedObjectArray<btVector3> m_X; // initial positions + btScalar m_gravityFactor; + bool m_cacheBarycenter; + btAlignedObjectArray<btVector3> m_X; // initial positions btAlignedObjectArray<btVector4> m_renderNodesInterpolationWeights; btAlignedObjectArray<btAlignedObjectArray<const btSoftBody::Node*> > m_renderNodesParents; - btAlignedObjectArray<btScalar> m_z; // vertical distance used in extrapolation + btAlignedObjectArray<btScalar> m_z; // vertical distance used in extrapolation bool m_useSelfCollision; bool m_softSoftCollision; @@ -856,11 +877,11 @@ public: { return m_worldInfo; } - - void setDampingCoefficient(btScalar damping_coeff) - { - m_dampingCoefficient = damping_coeff; - } + + void setDampingCoefficient(btScalar damping_coeff) + { + m_dampingCoefficient = damping_coeff; + } ///@todo: avoid internal softbody shape hack and move collision code to collision library virtual void setCollisionShape(btCollisionShape* collisionShape) @@ -921,11 +942,12 @@ public: Material* mat = 0); /* Append anchor */ - void appendDeformableAnchor(int node, btRigidBody* body); - void appendDeformableAnchor(int node, btMultiBodyLinkCollider* link); - void appendAnchor(int node, + void appendDeformableAnchor(int node, btRigidBody* body); + void appendDeformableAnchor(int node, btMultiBodyLinkCollider* link); + void appendAnchor(int node, btRigidBody* body, bool disableCollisionBetweenLinkedBodies = false, btScalar influence = 1); void appendAnchor(int node, btRigidBody* body, const btVector3& localPivot, bool disableCollisionBetweenLinkedBodies = false, btScalar influence = 1); + void removeAnchor(int node); /* Append linear joint */ void appendLinearJoint(const LJoint::Specs& specs, Cluster* body0, Body body1); void appendLinearJoint(const LJoint::Specs& specs, Body body = Body()); @@ -976,10 +998,10 @@ public: void setLinearVelocity(const btVector3& linVel); /* Set the angular velocity of the center of mass */ void setAngularVelocity(const btVector3& angVel); - /* Get best fit rigid transform */ - btTransform getRigidTransform(); - /* Transform to given pose */ - void transformTo(const btTransform& trs); + /* Get best fit rigid transform */ + btTransform getRigidTransform(); + /* Transform to given pose */ + void transformTo(const btTransform& trs); /* Transform */ void transform(const btTransform& trs); /* Translate */ @@ -1068,11 +1090,11 @@ public: /* defaultCollisionHandlers */ void defaultCollisionHandler(const btCollisionObjectWrapper* pcoWrap); void defaultCollisionHandler(btSoftBody* psb); - void setSelfCollision(bool useSelfCollision); - bool useSelfCollision(); - void updateDeactivation(btScalar timeStep); - void setZeroVelocity(); - bool wantsSleeping(); + void setSelfCollision(bool useSelfCollision); + bool useSelfCollision(); + void updateDeactivation(btScalar timeStep); + void setZeroVelocity(); + bool wantsSleeping(); // // Functionality to deal with new accelerated solvers. @@ -1151,8 +1173,8 @@ public: void rebuildNodeTree(); btVector3 evaluateCom() const; bool checkDeformableContact(const btCollisionObjectWrapper* colObjWrap, const btVector3& x, btScalar margin, btSoftBody::sCti& cti, bool predict = false) const; - bool checkDeformableFaceContact(const btCollisionObjectWrapper* colObjWrap, Face& f, btVector3& contact_point, btVector3& bary, btScalar margin, btSoftBody::sCti& cti, bool predict = false) const; - bool checkContact(const btCollisionObjectWrapper* colObjWrap, const btVector3& x, btScalar margin, btSoftBody::sCti& cti) const; + bool checkDeformableFaceContact(const btCollisionObjectWrapper* colObjWrap, Face& f, btVector3& contact_point, btVector3& bary, btScalar margin, btSoftBody::sCti& cti, bool predict = false) const; + bool checkContact(const btCollisionObjectWrapper* colObjWrap, const btVector3& x, btScalar margin, btSoftBody::sCti& cti) const; void updateNormals(); void updateBounds(); void updatePose(); @@ -1166,14 +1188,16 @@ public: void solveClusters(btScalar sor); void applyClusters(bool drift); void dampClusters(); - void setSpringStiffness(btScalar k); - void initializeDmInverse(); - void updateDeformation(); - void advanceDeformation(); + void setSpringStiffness(btScalar k); + void setGravityFactor(btScalar gravFactor); + void setCacheBarycenter(bool cacheBarycenter); + void initializeDmInverse(); + void updateDeformation(); + void advanceDeformation(); void applyForces(); - void setMaxStress(btScalar maxStress); - void interpolateRenderMesh(); - void setCollisionQuadrature(int N); + void setMaxStress(btScalar maxStress); + void interpolateRenderMesh(); + void setCollisionQuadrature(int N); static void PSolve_Anchors(btSoftBody* psb, btScalar kst, btScalar ti); static void PSolve_RContacts(btSoftBody* psb, btScalar kst, btScalar ti); static void PSolve_SContacts(btSoftBody* psb, btScalar, btScalar ti); @@ -1182,14 +1206,15 @@ public: static psolver_t getSolver(ePSolver::_ solver); static vsolver_t getSolver(eVSolver::_ solver); void geometricCollisionHandler(btSoftBody* psb); -#define SAFE_EPSILON SIMD_EPSILON*100.0 +#define SAFE_EPSILON SIMD_EPSILON * 100.0 void updateNode(btDbvtNode* node, bool use_velocity, bool margin) { if (node->isleaf()) { btSoftBody::Node* n = (btSoftBody::Node*)(node->data); - ATTRIBUTE_ALIGNED16(btDbvtVolume) vol; - btScalar pad = margin ? m_sst.radmrg : SAFE_EPSILON; // use user defined margin or margin for floating point precision + ATTRIBUTE_ALIGNED16(btDbvtVolume) + vol; + btScalar pad = margin ? m_sst.radmrg : SAFE_EPSILON; // use user defined margin or margin for floating point precision if (use_velocity) { btVector3 points[2] = {n->m_x, n->m_x + m_sst.sdt * n->m_v}; @@ -1207,38 +1232,40 @@ public: { updateNode(node->childs[0], use_velocity, margin); updateNode(node->childs[1], use_velocity, margin); - ATTRIBUTE_ALIGNED16(btDbvtVolume) vol; + ATTRIBUTE_ALIGNED16(btDbvtVolume) + vol; Merge(node->childs[0]->volume, node->childs[1]->volume, vol); node->volume = vol; } } - - void updateNodeTree(bool use_velocity, bool margin) + + void updateNodeTree(bool use_velocity, bool margin) { if (m_ndbvt.m_root) updateNode(m_ndbvt.m_root, use_velocity, margin); } - template <class DBVTNODE> // btDbvtNode or btDbvntNode + template <class DBVTNODE> // btDbvtNode or btDbvntNode void updateFace(DBVTNODE* node, bool use_velocity, bool margin) { if (node->isleaf()) { btSoftBody::Face* f = (btSoftBody::Face*)(node->data); - btScalar pad = margin ? m_sst.radmrg : SAFE_EPSILON; // use user defined margin or margin for floating point precision - ATTRIBUTE_ALIGNED16(btDbvtVolume) vol; + btScalar pad = margin ? m_sst.radmrg : SAFE_EPSILON; // use user defined margin or margin for floating point precision + ATTRIBUTE_ALIGNED16(btDbvtVolume) + vol; if (use_velocity) { btVector3 points[6] = {f->m_n[0]->m_x, f->m_n[0]->m_x + m_sst.sdt * f->m_n[0]->m_v, - f->m_n[1]->m_x, f->m_n[1]->m_x + m_sst.sdt * f->m_n[1]->m_v, - f->m_n[2]->m_x, f->m_n[2]->m_x + m_sst.sdt * f->m_n[2]->m_v}; + f->m_n[1]->m_x, f->m_n[1]->m_x + m_sst.sdt * f->m_n[1]->m_v, + f->m_n[2]->m_x, f->m_n[2]->m_x + m_sst.sdt * f->m_n[2]->m_v}; vol = btDbvtVolume::FromPoints(points, 6); } else { btVector3 points[3] = {f->m_n[0]->m_x, - f->m_n[1]->m_x, - f->m_n[2]->m_x}; + f->m_n[1]->m_x, + f->m_n[2]->m_x}; vol = btDbvtVolume::FromPoints(points, 3); } vol.Expand(btVector3(pad, pad, pad)); @@ -1249,7 +1276,8 @@ public: { updateFace(node->childs[0], use_velocity, margin); updateFace(node->childs[1], use_velocity, margin); - ATTRIBUTE_ALIGNED16(btDbvtVolume) vol; + ATTRIBUTE_ALIGNED16(btDbvtVolume) + vol; Merge(node->childs[0]->volume, node->childs[1]->volume, vol); node->volume = vol; } @@ -1271,7 +1299,7 @@ public: return (a * coord.x() + b * coord.y() + c * coord.z()); } - void applyRepulsionForce(btScalar timeStep, bool applySpringForce) + void applyRepulsionForce(btScalar timeStep, bool applySpringForce) { btAlignedObjectArray<int> indices; { @@ -1297,58 +1325,60 @@ public: const btVector3& n = c.m_normal; btVector3 l = node->m_x - BaryEval(face->m_n[0]->m_x, face->m_n[1]->m_x, face->m_n[2]->m_x, w); btScalar d = c.m_margin - n.dot(l); - d = btMax(btScalar(0),d); - + d = btMax(btScalar(0), d); + const btVector3& va = node->m_v; btVector3 vb = BaryEval(face->m_n[0]->m_v, face->m_n[1]->m_v, face->m_n[2]->m_v, w); btVector3 vr = va - vb; - const btScalar vn = btDot(vr, n); // dn < 0 <==> opposing + const btScalar vn = btDot(vr, n); // dn < 0 <==> opposing if (vn > OVERLAP_REDUCTION_FACTOR * d / timeStep) continue; - btVector3 vt = vr - vn*n; + btVector3 vt = vr - vn * n; btScalar I = 0; - btScalar mass = node->m_im == 0 ? 0 : btScalar(1)/node->m_im; + btScalar mass = node->m_im == 0 ? 0 : btScalar(1) / node->m_im; if (applySpringForce) I = -btMin(m_repulsionStiffness * timeStep * d, mass * (OVERLAP_REDUCTION_FACTOR * d / timeStep - vn)); if (vn < 0) I += 0.5 * mass * vn; - btScalar face_penetration = 0, node_penetration = node->m_penetration; + int face_penetration = 0, node_penetration = node->m_constrained; for (int i = 0; i < 3; ++i) - face_penetration = btMax(face_penetration, face->m_n[i]->m_penetration); - btScalar I_tilde = .5 *I /(1.0+w.length2()); - -// double the impulse if node or face is constrained. - if (face_penetration > 0 || node_penetration > 0) - I_tilde *= 2.0; - if (face_penetration <= node_penetration) + face_penetration |= face->m_n[i]->m_constrained; + btScalar I_tilde = 2.0 * I / (1.0 + w.length2()); + + // double the impulse if node or face is constrained. + if (face_penetration > 0 || node_penetration > 0) + { + I_tilde *= 2.0; + } + if (face_penetration <= 0) { for (int j = 0; j < 3; ++j) - face->m_n[j]->m_v += w[j]*n*I_tilde*node->m_im; + face->m_n[j]->m_v += w[j] * n * I_tilde * node->m_im; } - if (face_penetration >= node_penetration) + if (node_penetration <= 0) { - node->m_v -= I_tilde*node->m_im*n; + node->m_v -= I_tilde * node->m_im * n; } - + // apply frictional impulse btScalar vt_norm = vt.safeNorm(); if (vt_norm > SIMD_EPSILON) { btScalar delta_vn = -2 * I * node->m_im; btScalar mu = c.m_friction; - btScalar vt_new = btMax(btScalar(1) - mu * delta_vn / (vt_norm + SIMD_EPSILON), btScalar(0))*vt_norm; - I = 0.5 * mass * (vt_norm-vt_new); + btScalar vt_new = btMax(btScalar(1) - mu * delta_vn / (vt_norm + SIMD_EPSILON), btScalar(0)) * vt_norm; + I = 0.5 * mass * (vt_norm - vt_new); vt.safeNormalize(); - I_tilde = .5 *I /(1.0+w.length2()); -// double the impulse if node or face is constrained. -// if (face_penetration > 0 || node_penetration > 0) -// I_tilde *= 2.0; - if (face_penetration <= node_penetration) + I_tilde = 2.0 * I / (1.0 + w.length2()); + // double the impulse if node or face is constrained. + if (face_penetration > 0 || node_penetration > 0) + I_tilde *= 2.0; + if (face_penetration <= 0) { for (int j = 0; j < 3; ++j) face->m_n[j]->m_v += w[j] * vt * I_tilde * (face->m_n[j])->m_im; } - if (face_penetration >= node_penetration) + if (node_penetration <= 0) { node->m_v -= I_tilde * node->m_im * vt; } @@ -1356,7 +1386,7 @@ public: } } virtual int calculateSerializeBufferSize() const; - + ///fills the dataBuffer and returns the struct name (and 0 on failure) virtual const char* serialize(void* dataBuffer, class btSerializer* serializer) const; }; diff --git a/thirdparty/bullet/BulletSoftBody/btSoftBodyHelpers.cpp b/thirdparty/bullet/BulletSoftBody/btSoftBodyHelpers.cpp index c1a87c7d57..f63e48f9a5 100644 --- a/thirdparty/bullet/BulletSoftBody/btSoftBodyHelpers.cpp +++ b/thirdparty/bullet/BulletSoftBody/btSoftBodyHelpers.cpp @@ -727,7 +727,7 @@ btSoftBody* btSoftBodyHelpers::CreatePatch(btSoftBodyWorldInfo& worldInfo, const int resy, int fixeds, bool gendiags, - btScalar perturbation) + btScalar perturbation) { #define IDX(_x_, _y_) ((_y_)*rx + (_x_)) /* Create nodes */ @@ -747,12 +747,12 @@ btSoftBody* btSoftBodyHelpers::CreatePatch(btSoftBodyWorldInfo& worldInfo, const for (int ix = 0; ix < rx; ++ix) { const btScalar tx = ix / (btScalar)(rx - 1); - btScalar pert = perturbation * btScalar(rand())/RAND_MAX; - btVector3 temp1 = py1; - temp1.setY(py1.getY() + pert); - btVector3 temp = py0; - pert = perturbation * btScalar(rand())/RAND_MAX; - temp.setY(py0.getY() + pert); + btScalar pert = perturbation * btScalar(rand()) / RAND_MAX; + btVector3 temp1 = py1; + temp1.setY(py1.getY() + pert); + btVector3 temp = py0; + pert = perturbation * btScalar(rand()) / RAND_MAX; + temp.setY(py0.getY() + pert); x[IDX(ix, iy)] = lerp(temp, temp1, tx); m[IDX(ix, iy)] = 1; } @@ -1233,9 +1233,9 @@ if(face&&face[0]) } } } - psb->initializeDmInverse(); - psb->m_tetraScratches.resize(psb->m_tetras.size()); - psb->m_tetraScratchesTn.resize(psb->m_tetras.size()); + psb->initializeDmInverse(); + psb->m_tetraScratches.resize(psb->m_tetras.size()); + psb->m_tetraScratchesTn.resize(psb->m_tetras.size()); printf("Nodes: %u\r\n", psb->m_nodes.size()); printf("Links: %u\r\n", psb->m_links.size()); printf("Faces: %u\r\n", psb->m_faces.size()); @@ -1245,61 +1245,62 @@ if(face&&face[0]) btSoftBody* btSoftBodyHelpers::CreateFromVtkFile(btSoftBodyWorldInfo& worldInfo, const char* vtk_file) { - std::ifstream fs; - fs.open(vtk_file); - btAssert(fs); - - typedef btAlignedObjectArray<int> Index; - std::string line; - btAlignedObjectArray<btVector3> X; - btVector3 position; - btAlignedObjectArray<Index> indices; - bool reading_points = false; - bool reading_tets = false; - size_t n_points = 0; - size_t n_tets = 0; - size_t x_count = 0; - size_t indices_count = 0; - while (std::getline(fs, line)) - { - std::stringstream ss(line); - if (line.size() == (size_t)(0)) - { - } - else if (line.substr(0, 6) == "POINTS") - { - reading_points = true; - reading_tets = false; - ss.ignore(128, ' '); // ignore "POINTS" - ss >> n_points; - X.resize(n_points); - } - else if (line.substr(0, 5) == "CELLS") - { - reading_points = false; - reading_tets = true; - ss.ignore(128, ' '); // ignore "CELLS" - ss >> n_tets; - indices.resize(n_tets); - } - else if (line.substr(0, 10) == "CELL_TYPES") - { - reading_points = false; - reading_tets = false; - } - else if (reading_points) - { - btScalar p; - ss >> p; - position.setX(p); - ss >> p; - position.setY(p); - ss >> p; - position.setZ(p); - X[x_count++] = position; - } - else if (reading_tets) - { + std::ifstream fs; + fs.open(vtk_file); + btAssert(fs); + + typedef btAlignedObjectArray<int> Index; + std::string line; + btAlignedObjectArray<btVector3> X; + btVector3 position; + btAlignedObjectArray<Index> indices; + bool reading_points = false; + bool reading_tets = false; + size_t n_points = 0; + size_t n_tets = 0; + size_t x_count = 0; + size_t indices_count = 0; + while (std::getline(fs, line)) + { + std::stringstream ss(line); + if (line.size() == (size_t)(0)) + { + } + else if (line.substr(0, 6) == "POINTS") + { + reading_points = true; + reading_tets = false; + ss.ignore(128, ' '); // ignore "POINTS" + ss >> n_points; + X.resize(n_points); + } + else if (line.substr(0, 5) == "CELLS") + { + reading_points = false; + reading_tets = true; + ss.ignore(128, ' '); // ignore "CELLS" + ss >> n_tets; + indices.resize(n_tets); + } + else if (line.substr(0, 10) == "CELL_TYPES") + { + reading_points = false; + reading_tets = false; + } + else if (reading_points) + { + btScalar p; + ss >> p; + position.setX(p); + ss >> p; + position.setY(p); + ss >> p; + position.setZ(p); + //printf("v %f %f %f\n", position.getX(), position.getY(), position.getZ()); + X[x_count++] = position; + } + else if (reading_tets) + { int d; ss >> d; if (d != 4) @@ -1308,317 +1309,355 @@ btSoftBody* btSoftBodyHelpers::CreateFromVtkFile(btSoftBodyWorldInfo& worldInfo, fs.close(); return 0; } - ss.ignore(128, ' '); // ignore "4" - Index tet; - tet.resize(4); - for (size_t i = 0; i < 4; i++) - { - ss >> tet[i]; - printf("%d ", tet[i]); - } - printf("\n"); - indices[indices_count++] = tet; - } - } - btSoftBody* psb = new btSoftBody(&worldInfo, n_points, &X[0], 0); - - for (int i = 0; i < n_tets; ++i) - { - const Index& ni = indices[i]; - psb->appendTetra(ni[0], ni[1], ni[2], ni[3]); - { - psb->appendLink(ni[0], ni[1], 0, true); - psb->appendLink(ni[1], ni[2], 0, true); - psb->appendLink(ni[2], ni[0], 0, true); - psb->appendLink(ni[0], ni[3], 0, true); - psb->appendLink(ni[1], ni[3], 0, true); - psb->appendLink(ni[2], ni[3], 0, true); - } - } - - - generateBoundaryFaces(psb); - psb->initializeDmInverse(); - psb->m_tetraScratches.resize(psb->m_tetras.size()); - psb->m_tetraScratchesTn.resize(psb->m_tetras.size()); - printf("Nodes: %u\r\n", psb->m_nodes.size()); - printf("Links: %u\r\n", psb->m_links.size()); - printf("Faces: %u\r\n", psb->m_faces.size()); - printf("Tetras: %u\r\n", psb->m_tetras.size()); - - fs.close(); - return psb; + ss.ignore(128, ' '); // ignore "4" + Index tet; + tet.resize(4); + for (size_t i = 0; i < 4; i++) + { + ss >> tet[i]; + //printf("%d ", tet[i]); + } + //printf("\n"); + indices[indices_count++] = tet; + } + } + btSoftBody* psb = new btSoftBody(&worldInfo, n_points, &X[0], 0); + + for (int i = 0; i < n_tets; ++i) + { + const Index& ni = indices[i]; + psb->appendTetra(ni[0], ni[1], ni[2], ni[3]); + { + psb->appendLink(ni[0], ni[1], 0, true); + psb->appendLink(ni[1], ni[2], 0, true); + psb->appendLink(ni[2], ni[0], 0, true); + psb->appendLink(ni[0], ni[3], 0, true); + psb->appendLink(ni[1], ni[3], 0, true); + psb->appendLink(ni[2], ni[3], 0, true); + } + } + + generateBoundaryFaces(psb); + psb->initializeDmInverse(); + psb->m_tetraScratches.resize(psb->m_tetras.size()); + psb->m_tetraScratchesTn.resize(psb->m_tetras.size()); + printf("Nodes: %u\r\n", psb->m_nodes.size()); + printf("Links: %u\r\n", psb->m_links.size()); + printf("Faces: %u\r\n", psb->m_faces.size()); + printf("Tetras: %u\r\n", psb->m_tetras.size()); + + fs.close(); + return psb; } void btSoftBodyHelpers::generateBoundaryFaces(btSoftBody* psb) { - int counter = 0; - for (int i = 0; i < psb->m_nodes.size(); ++i) - { - psb->m_nodes[i].index = counter++; - } - typedef btAlignedObjectArray<int> Index; - btAlignedObjectArray<Index> indices; - indices.resize(psb->m_tetras.size()); - for (int i = 0; i < indices.size(); ++i) - { - Index index; - index.push_back(psb->m_tetras[i].m_n[0]->index); - index.push_back(psb->m_tetras[i].m_n[1]->index); - index.push_back(psb->m_tetras[i].m_n[2]->index); - index.push_back(psb->m_tetras[i].m_n[3]->index); - indices[i] = index; - } - - std::map<std::vector<int>, std::vector<int> > dict; - for (int i = 0; i < indices.size(); ++i) - { - for (int j = 0; j < 4; ++j) - { - std::vector<int> f; - if (j == 0) - { - f.push_back(indices[i][1]); - f.push_back(indices[i][0]); - f.push_back(indices[i][2]); - } - if (j == 1) - { - f.push_back(indices[i][3]); - f.push_back(indices[i][0]); - f.push_back(indices[i][1]); - } - if (j == 2) - { - f.push_back(indices[i][3]); - f.push_back(indices[i][1]); - f.push_back(indices[i][2]); - } - if (j == 3) - { - f.push_back(indices[i][2]); - f.push_back(indices[i][0]); - f.push_back(indices[i][3]); - } - std::vector<int> f_sorted = f; - std::sort(f_sorted.begin(), f_sorted.end()); - if (dict.find(f_sorted) != dict.end()) - { - dict.erase(f_sorted); - } - else - { - dict.insert(std::make_pair(f_sorted, f)); - } - } - } - - for (std::map<std::vector<int>, std::vector<int> >::iterator it = dict.begin(); it != dict.end(); ++it) - { - std::vector<int> f = it->second; - psb->appendFace(f[0], f[1], f[2]); - } + int counter = 0; + for (int i = 0; i < psb->m_nodes.size(); ++i) + { + psb->m_nodes[i].index = counter++; + } + typedef btAlignedObjectArray<int> Index; + btAlignedObjectArray<Index> indices; + indices.resize(psb->m_tetras.size()); + for (int i = 0; i < indices.size(); ++i) + { + Index index; + index.push_back(psb->m_tetras[i].m_n[0]->index); + index.push_back(psb->m_tetras[i].m_n[1]->index); + index.push_back(psb->m_tetras[i].m_n[2]->index); + index.push_back(psb->m_tetras[i].m_n[3]->index); + indices[i] = index; + } + + std::map<std::vector<int>, std::vector<int> > dict; + for (int i = 0; i < indices.size(); ++i) + { + for (int j = 0; j < 4; ++j) + { + std::vector<int> f; + if (j == 0) + { + f.push_back(indices[i][1]); + f.push_back(indices[i][0]); + f.push_back(indices[i][2]); + } + if (j == 1) + { + f.push_back(indices[i][3]); + f.push_back(indices[i][0]); + f.push_back(indices[i][1]); + } + if (j == 2) + { + f.push_back(indices[i][3]); + f.push_back(indices[i][1]); + f.push_back(indices[i][2]); + } + if (j == 3) + { + f.push_back(indices[i][2]); + f.push_back(indices[i][0]); + f.push_back(indices[i][3]); + } + std::vector<int> f_sorted = f; + std::sort(f_sorted.begin(), f_sorted.end()); + if (dict.find(f_sorted) != dict.end()) + { + dict.erase(f_sorted); + } + else + { + dict.insert(std::make_pair(f_sorted, f)); + } + } + } + + for (std::map<std::vector<int>, std::vector<int> >::iterator it = dict.begin(); it != dict.end(); ++it) + { + std::vector<int> f = it->second; + psb->appendFace(f[0], f[1], f[2]); + //printf("f %d %d %d\n", f[0] + 1, f[1] + 1, f[2] + 1); + } } +//Write the surface mesh to an obj file. void btSoftBodyHelpers::writeObj(const char* filename, const btSoftBody* psb) { - std::ofstream fs; - fs.open(filename); - btAssert(fs); - for (int i = 0; i < psb->m_nodes.size(); ++i) - { - fs << "v"; - for (int d = 0; d < 3; d++) - { - fs << " " << psb->m_nodes[i].m_x[d]; - } - fs << "\n"; - } - - for (int i = 0; i < psb->m_faces.size(); ++i) - { - fs << "f"; - for (int n = 0; n < 3; n++) - { - fs << " " << psb->m_faces[i].m_n[n]->index + 1; - } - fs << "\n"; - } - fs.close(); + std::ofstream fs; + fs.open(filename); + btAssert(fs); + + if (psb->m_tetras.size() > 0) + { + // For tetrahedron mesh, we need to re-index the surface mesh for it to be in obj file/ + std::map<int, int> dict; + for (int i = 0; i < psb->m_faces.size(); i++) + { + for (int d = 0; d < 3; d++) + { + int index = psb->m_faces[i].m_n[d]->index; + if (dict.find(index) == dict.end()) + { + int dict_size = dict.size(); + dict[index] = dict_size; + fs << "v"; + for (int k = 0; k < 3; k++) + { + fs << " " << psb->m_nodes[index].m_x[k]; + } + fs << "\n"; + } + } + } + // Write surface mesh. + for (int i = 0; i < psb->m_faces.size(); ++i) + { + fs << "f"; + for (int n = 0; n < 3; n++) + { + fs << " " << dict[psb->m_faces[i].m_n[n]->index] + 1; + } + fs << "\n"; + } + } + else + { + // For trimesh, directly write out all the nodes and faces.xs + for (int i = 0; i < psb->m_nodes.size(); ++i) + { + fs << "v"; + for (int d = 0; d < 3; d++) + { + fs << " " << psb->m_nodes[i].m_x[d]; + } + fs << "\n"; + } + + for (int i = 0; i < psb->m_faces.size(); ++i) + { + fs << "f"; + for (int n = 0; n < 3; n++) + { + fs << " " << psb->m_faces[i].m_n[n]->index + 1; + } + fs << "\n"; + } + } + fs.close(); } void btSoftBodyHelpers::duplicateFaces(const char* filename, const btSoftBody* psb) { - std::ifstream fs_read; - fs_read.open(filename); - std::string line; - btVector3 pos; - btAlignedObjectArray<btAlignedObjectArray<int> > additional_faces; - while (std::getline(fs_read, line)) - { - std::stringstream ss(line); - if (line[0] == 'v') - { - } - else if (line[0] == 'f') - { - ss.ignore(); - int id0, id1, id2; - ss >> id0; - ss >> id1; - ss >> id2; - btAlignedObjectArray<int> new_face; - new_face.push_back(id1); - new_face.push_back(id0); - new_face.push_back(id2); - additional_faces.push_back(new_face); - } - } - fs_read.close(); - - std::ofstream fs_write; - fs_write.open(filename, std::ios_base::app); - for (int i = 0; i < additional_faces.size(); ++i) - { - fs_write << "f"; - for (int n = 0; n < 3; n++) - { - fs_write << " " << additional_faces[i][n]; - } - fs_write << "\n"; - } - fs_write.close(); + std::ifstream fs_read; + fs_read.open(filename); + std::string line; + btVector3 pos; + btAlignedObjectArray<btAlignedObjectArray<int> > additional_faces; + while (std::getline(fs_read, line)) + { + std::stringstream ss(line); + if (line[0] == 'v') + { + } + else if (line[0] == 'f') + { + ss.ignore(); + int id0, id1, id2; + ss >> id0; + ss >> id1; + ss >> id2; + btAlignedObjectArray<int> new_face; + new_face.push_back(id1); + new_face.push_back(id0); + new_face.push_back(id2); + additional_faces.push_back(new_face); + } + } + fs_read.close(); + + std::ofstream fs_write; + fs_write.open(filename, std::ios_base::app); + for (int i = 0; i < additional_faces.size(); ++i) + { + fs_write << "f"; + for (int n = 0; n < 3; n++) + { + fs_write << " " << additional_faces[i][n]; + } + fs_write << "\n"; + } + fs_write.close(); } // Given a simplex with vertices a,b,c,d, find the barycentric weights of p in this simplex void btSoftBodyHelpers::getBarycentricWeights(const btVector3& a, const btVector3& b, const btVector3& c, const btVector3& d, const btVector3& p, btVector4& bary) { - btVector3 vap = p - a; - btVector3 vbp = p - b; - - btVector3 vab = b - a; - btVector3 vac = c - a; - btVector3 vad = d - a; - - btVector3 vbc = c - b; - btVector3 vbd = d - b; - btScalar va6 = (vbp.cross(vbd)).dot(vbc); - btScalar vb6 = (vap.cross(vac)).dot(vad); - btScalar vc6 = (vap.cross(vad)).dot(vab); - btScalar vd6 = (vap.cross(vab)).dot(vac); - btScalar v6 = btScalar(1) / (vab.cross(vac).dot(vad)); - bary = btVector4(va6*v6, vb6*v6, vc6*v6, vd6*v6); + btVector3 vap = p - a; + btVector3 vbp = p - b; + + btVector3 vab = b - a; + btVector3 vac = c - a; + btVector3 vad = d - a; + + btVector3 vbc = c - b; + btVector3 vbd = d - b; + btScalar va6 = (vbp.cross(vbd)).dot(vbc); + btScalar vb6 = (vap.cross(vac)).dot(vad); + btScalar vc6 = (vap.cross(vad)).dot(vab); + btScalar vd6 = (vap.cross(vab)).dot(vac); + btScalar v6 = btScalar(1) / (vab.cross(vac).dot(vad)); + bary = btVector4(va6 * v6, vb6 * v6, vc6 * v6, vd6 * v6); } // Given a simplex with vertices a,b,c, find the barycentric weights of p in this simplex. bary[3] = 0. void btSoftBodyHelpers::getBarycentricWeights(const btVector3& a, const btVector3& b, const btVector3& c, const btVector3& p, btVector4& bary) { - btVector3 v0 = b - a, v1 = c - a, v2 = p - a; - btScalar d00 = btDot(v0, v0); - btScalar d01 = btDot(v0, v1); - btScalar d11 = btDot(v1, v1); - btScalar d20 = btDot(v2, v0); - btScalar d21 = btDot(v2, v1); - btScalar invDenom = 1.0 / (d00 * d11 - d01 * d01); - bary[1] = (d11 * d20 - d01 * d21) * invDenom; - bary[2] = (d00 * d21 - d01 * d20) * invDenom; - bary[0] = 1.0 - bary[1] - bary[2]; - bary[3] = 0; + btVector3 v0 = b - a, v1 = c - a, v2 = p - a; + btScalar d00 = btDot(v0, v0); + btScalar d01 = btDot(v0, v1); + btScalar d11 = btDot(v1, v1); + btScalar d20 = btDot(v2, v0); + btScalar d21 = btDot(v2, v1); + btScalar invDenom = 1.0 / (d00 * d11 - d01 * d01); + bary[1] = (d11 * d20 - d01 * d21) * invDenom; + bary[2] = (d00 * d21 - d01 * d20) * invDenom; + bary[0] = 1.0 - bary[1] - bary[2]; + bary[3] = 0; } // Iterate through all render nodes to find the simulation tetrahedron that contains the render node and record the barycentric weights // If the node is not inside any tetrahedron, assign it to the tetrahedron in which the node has the least negative barycentric weight void btSoftBodyHelpers::interpolateBarycentricWeights(btSoftBody* psb) { - psb->m_z.resize(0); - psb->m_renderNodesInterpolationWeights.resize(psb->m_renderNodes.size()); - psb->m_renderNodesParents.resize(psb->m_renderNodes.size()); - for (int i = 0; i < psb->m_renderNodes.size(); ++i) - { - const btVector3& p = psb->m_renderNodes[i].m_x; - btVector4 bary; - btVector4 optimal_bary; - btScalar min_bary_weight = -1e3; - btAlignedObjectArray<const btSoftBody::Node*> optimal_parents; - for (int j = 0; j < psb->m_tetras.size(); ++j) - { - const btSoftBody::Tetra& t = psb->m_tetras[j]; - getBarycentricWeights(t.m_n[0]->m_x, t.m_n[1]->m_x, t.m_n[2]->m_x, t.m_n[3]->m_x, p, bary); - btScalar new_min_bary_weight = bary[0]; - for (int k = 1; k < 4; ++k) - { - new_min_bary_weight = btMin(new_min_bary_weight, bary[k]); - } - if (new_min_bary_weight > min_bary_weight) - { - btAlignedObjectArray<const btSoftBody::Node*> parents; - parents.push_back(t.m_n[0]); - parents.push_back(t.m_n[1]); - parents.push_back(t.m_n[2]); - parents.push_back(t.m_n[3]); - optimal_parents = parents; - optimal_bary = bary; - min_bary_weight = new_min_bary_weight; - // stop searching if p is inside the tetrahedron at hand - if (bary[0]>=0. && bary[1]>=0. && bary[2]>=0. && bary[3]>=0.) - { - break; - } - } - } - psb->m_renderNodesInterpolationWeights[i] = optimal_bary; - psb->m_renderNodesParents[i] = optimal_parents; - } + psb->m_z.resize(0); + psb->m_renderNodesInterpolationWeights.resize(psb->m_renderNodes.size()); + psb->m_renderNodesParents.resize(psb->m_renderNodes.size()); + for (int i = 0; i < psb->m_renderNodes.size(); ++i) + { + const btVector3& p = psb->m_renderNodes[i].m_x; + btVector4 bary; + btVector4 optimal_bary; + btScalar min_bary_weight = -1e3; + btAlignedObjectArray<const btSoftBody::Node*> optimal_parents; + for (int j = 0; j < psb->m_tetras.size(); ++j) + { + const btSoftBody::Tetra& t = psb->m_tetras[j]; + getBarycentricWeights(t.m_n[0]->m_x, t.m_n[1]->m_x, t.m_n[2]->m_x, t.m_n[3]->m_x, p, bary); + btScalar new_min_bary_weight = bary[0]; + for (int k = 1; k < 4; ++k) + { + new_min_bary_weight = btMin(new_min_bary_weight, bary[k]); + } + if (new_min_bary_weight > min_bary_weight) + { + btAlignedObjectArray<const btSoftBody::Node*> parents; + parents.push_back(t.m_n[0]); + parents.push_back(t.m_n[1]); + parents.push_back(t.m_n[2]); + parents.push_back(t.m_n[3]); + optimal_parents = parents; + optimal_bary = bary; + min_bary_weight = new_min_bary_weight; + // stop searching if p is inside the tetrahedron at hand + if (bary[0] >= 0. && bary[1] >= 0. && bary[2] >= 0. && bary[3] >= 0.) + { + break; + } + } + } + psb->m_renderNodesInterpolationWeights[i] = optimal_bary; + psb->m_renderNodesParents[i] = optimal_parents; + } } - // Iterate through all render nodes to find the simulation triangle that's closest to the node in the barycentric sense. void btSoftBodyHelpers::extrapolateBarycentricWeights(btSoftBody* psb) { - psb->m_renderNodesInterpolationWeights.resize(psb->m_renderNodes.size()); - psb->m_renderNodesParents.resize(psb->m_renderNodes.size()); - psb->m_z.resize(psb->m_renderNodes.size()); - for (int i = 0; i < psb->m_renderNodes.size(); ++i) - { - const btVector3& p = psb->m_renderNodes[i].m_x; - btVector4 bary; - btVector4 optimal_bary; - btScalar min_bary_weight = -SIMD_INFINITY; - btAlignedObjectArray<const btSoftBody::Node*> optimal_parents; - btScalar dist = 0, optimal_dist = 0; - for (int j = 0; j < psb->m_faces.size(); ++j) - { - const btSoftBody::Face& f = psb->m_faces[j]; - btVector3 n = btCross(f.m_n[1]->m_x - f.m_n[0]->m_x, f.m_n[2]->m_x - f.m_n[0]->m_x); - btVector3 unit_n = n.normalized(); - dist = (p-f.m_n[0]->m_x).dot(unit_n); - btVector3 proj_p = p - dist*unit_n; - getBarycentricWeights(f.m_n[0]->m_x, f.m_n[1]->m_x, f.m_n[2]->m_x, proj_p, bary); - btScalar new_min_bary_weight = bary[0]; - for (int k = 1; k < 3; ++k) - { - new_min_bary_weight = btMin(new_min_bary_weight, bary[k]); - } - - // p is out of the current best triangle, we found a traingle that's better - bool better_than_closest_outisde = (new_min_bary_weight > min_bary_weight && min_bary_weight<0.); - // p is inside of the current best triangle, we found a triangle that's better - bool better_than_best_inside = (new_min_bary_weight>=0 && min_bary_weight>=0 && btFabs(dist)<btFabs(optimal_dist)); - - if (better_than_closest_outisde || better_than_best_inside) - { - btAlignedObjectArray<const btSoftBody::Node*> parents; - parents.push_back(f.m_n[0]); - parents.push_back(f.m_n[1]); - parents.push_back(f.m_n[2]); - optimal_parents = parents; - optimal_bary = bary; - optimal_dist = dist; - min_bary_weight = new_min_bary_weight; - } - } - psb->m_renderNodesInterpolationWeights[i] = optimal_bary; - psb->m_renderNodesParents[i] = optimal_parents; - psb->m_z[i] = optimal_dist; - } + psb->m_renderNodesInterpolationWeights.resize(psb->m_renderNodes.size()); + psb->m_renderNodesParents.resize(psb->m_renderNodes.size()); + psb->m_z.resize(psb->m_renderNodes.size()); + for (int i = 0; i < psb->m_renderNodes.size(); ++i) + { + const btVector3& p = psb->m_renderNodes[i].m_x; + btVector4 bary; + btVector4 optimal_bary; + btScalar min_bary_weight = -SIMD_INFINITY; + btAlignedObjectArray<const btSoftBody::Node*> optimal_parents; + btScalar dist = 0, optimal_dist = 0; + for (int j = 0; j < psb->m_faces.size(); ++j) + { + const btSoftBody::Face& f = psb->m_faces[j]; + btVector3 n = btCross(f.m_n[1]->m_x - f.m_n[0]->m_x, f.m_n[2]->m_x - f.m_n[0]->m_x); + btVector3 unit_n = n.normalized(); + dist = (p - f.m_n[0]->m_x).dot(unit_n); + btVector3 proj_p = p - dist * unit_n; + getBarycentricWeights(f.m_n[0]->m_x, f.m_n[1]->m_x, f.m_n[2]->m_x, proj_p, bary); + btScalar new_min_bary_weight = bary[0]; + for (int k = 1; k < 3; ++k) + { + new_min_bary_weight = btMin(new_min_bary_weight, bary[k]); + } + + // p is out of the current best triangle, we found a traingle that's better + bool better_than_closest_outisde = (new_min_bary_weight > min_bary_weight && min_bary_weight < 0.); + // p is inside of the current best triangle, we found a triangle that's better + bool better_than_best_inside = (new_min_bary_weight >= 0 && min_bary_weight >= 0 && btFabs(dist) < btFabs(optimal_dist)); + + if (better_than_closest_outisde || better_than_best_inside) + { + btAlignedObjectArray<const btSoftBody::Node*> parents; + parents.push_back(f.m_n[0]); + parents.push_back(f.m_n[1]); + parents.push_back(f.m_n[2]); + optimal_parents = parents; + optimal_bary = bary; + optimal_dist = dist; + min_bary_weight = new_min_bary_weight; + } + } + psb->m_renderNodesInterpolationWeights[i] = optimal_bary; + psb->m_renderNodesParents[i] = optimal_parents; + psb->m_z[i] = optimal_dist; + } } diff --git a/thirdparty/bullet/BulletSoftBody/btSoftBodyHelpers.h b/thirdparty/bullet/BulletSoftBody/btSoftBodyHelpers.h index abe1870890..237d29761d 100644 --- a/thirdparty/bullet/BulletSoftBody/btSoftBodyHelpers.h +++ b/thirdparty/bullet/BulletSoftBody/btSoftBodyHelpers.h @@ -93,7 +93,7 @@ struct btSoftBodyHelpers int resy, int fixeds, bool gendiags, - btScalar perturbation = 0.); + btScalar perturbation = 0.); /* Create a patch with UV Texture Coordinates */ static btSoftBody* CreatePatchUV(btSoftBodyWorldInfo& worldInfo, const btVector3& corner00, @@ -142,21 +142,21 @@ struct btSoftBodyHelpers bool bfacelinks, bool btetralinks, bool bfacesfromtetras); - static btSoftBody* CreateFromVtkFile(btSoftBodyWorldInfo& worldInfo, const char* vtk_file); + static btSoftBody* CreateFromVtkFile(btSoftBodyWorldInfo& worldInfo, const char* vtk_file); - static void writeObj(const char* file, const btSoftBody* psb); - - static void getBarycentricWeights(const btVector3& a, const btVector3& b, const btVector3& c, const btVector3& d, const btVector3& p, btVector4& bary); - - static void getBarycentricWeights(const btVector3& a, const btVector3& b, const btVector3& c, const btVector3& p, btVector4& bary); - - static void interpolateBarycentricWeights(btSoftBody* psb); - - static void extrapolateBarycentricWeights(btSoftBody* psb); - - static void generateBoundaryFaces(btSoftBody* psb); - - static void duplicateFaces(const char* filename, const btSoftBody* psb); + static void writeObj(const char* file, const btSoftBody* psb); + + static void getBarycentricWeights(const btVector3& a, const btVector3& b, const btVector3& c, const btVector3& d, const btVector3& p, btVector4& bary); + + static void getBarycentricWeights(const btVector3& a, const btVector3& b, const btVector3& c, const btVector3& p, btVector4& bary); + + static void interpolateBarycentricWeights(btSoftBody* psb); + + static void extrapolateBarycentricWeights(btSoftBody* psb); + + static void generateBoundaryFaces(btSoftBody* psb); + + static void duplicateFaces(const char* filename, const btSoftBody* psb); /// Sort the list of links to move link calculations that are dependent upon earlier /// ones as far as possible away from the calculation of those values /// This tends to make adjacent loop iterations not dependent upon one another, diff --git a/thirdparty/bullet/BulletSoftBody/btSoftBodyInternals.h b/thirdparty/bullet/BulletSoftBody/btSoftBodyInternals.h index b9ebc95b6b..c17bbb5cd4 100644 --- a/thirdparty/bullet/BulletSoftBody/btSoftBodyInternals.h +++ b/thirdparty/bullet/BulletSoftBody/btSoftBodyInternals.h @@ -32,86 +32,85 @@ subject to the following restrictions: // Given a multibody link, a contact point and a contact direction, fill in the jacobian data needed to calculate the velocity change given an impulse in the contact direction static SIMD_FORCE_INLINE void findJacobian(const btMultiBodyLinkCollider* multibodyLinkCol, - btMultiBodyJacobianData& jacobianData, - const btVector3& contact_point, - const btVector3& dir) -{ - const int ndof = multibodyLinkCol->m_multiBody->getNumDofs() + 6; - jacobianData.m_jacobians.resize(ndof); - jacobianData.m_deltaVelocitiesUnitImpulse.resize(ndof); - btScalar* jac = &jacobianData.m_jacobians[0]; - - multibodyLinkCol->m_multiBody->fillContactJacobianMultiDof(multibodyLinkCol->m_link, contact_point, dir, jac, jacobianData.scratch_r, jacobianData.scratch_v, jacobianData.scratch_m); - multibodyLinkCol->m_multiBody->calcAccelerationDeltasMultiDof(&jacobianData.m_jacobians[0], &jacobianData.m_deltaVelocitiesUnitImpulse[0], jacobianData.scratch_r, jacobianData.scratch_v); + btMultiBodyJacobianData& jacobianData, + const btVector3& contact_point, + const btVector3& dir) +{ + const int ndof = multibodyLinkCol->m_multiBody->getNumDofs() + 6; + jacobianData.m_jacobians.resize(ndof); + jacobianData.m_deltaVelocitiesUnitImpulse.resize(ndof); + btScalar* jac = &jacobianData.m_jacobians[0]; + + multibodyLinkCol->m_multiBody->fillContactJacobianMultiDof(multibodyLinkCol->m_link, contact_point, dir, jac, jacobianData.scratch_r, jacobianData.scratch_v, jacobianData.scratch_m); + multibodyLinkCol->m_multiBody->calcAccelerationDeltasMultiDof(&jacobianData.m_jacobians[0], &jacobianData.m_deltaVelocitiesUnitImpulse[0], jacobianData.scratch_r, jacobianData.scratch_v); } static SIMD_FORCE_INLINE btVector3 generateUnitOrthogonalVector(const btVector3& u) { - btScalar ux = u.getX(); - btScalar uy = u.getY(); - btScalar uz = u.getZ(); - btScalar ax = std::abs(ux); - btScalar ay = std::abs(uy); - btScalar az = std::abs(uz); - btVector3 v; - if (ax <= ay && ax <= az) - v = btVector3(0, -uz, uy); - else if (ay <= ax && ay <= az) - v = btVector3(-uz, 0, ux); - else - v = btVector3(-uy, ux, 0); - v.normalize(); - return v; + btScalar ux = u.getX(); + btScalar uy = u.getY(); + btScalar uz = u.getZ(); + btScalar ax = std::abs(ux); + btScalar ay = std::abs(uy); + btScalar az = std::abs(uz); + btVector3 v; + if (ax <= ay && ax <= az) + v = btVector3(0, -uz, uy); + else if (ay <= ax && ay <= az) + v = btVector3(-uz, 0, ux); + else + v = btVector3(-uy, ux, 0); + v.normalize(); + return v; } static SIMD_FORCE_INLINE bool proximityTest(const btVector3& x1, const btVector3& x2, const btVector3& x3, const btVector3& x4, const btVector3& normal, const btScalar& mrg, btVector3& bary) { - btVector3 x43 = x4-x3; - if (std::abs(x43.dot(normal)) > mrg) - return false; - btVector3 x13 = x1-x3; - btVector3 x23 = x2-x3; - btScalar a11 = x13.length2(); - btScalar a22 = x23.length2(); - btScalar a12 = x13.dot(x23); - btScalar b1 = x13.dot(x43); - btScalar b2 = x23.dot(x43); - btScalar det = a11*a22 - a12*a12; - if (det < SIMD_EPSILON) - return false; - btScalar w1 = (b1*a22-b2*a12)/det; - btScalar w2 = (b2*a11-b1*a12)/det; - btScalar w3 = 1-w1-w2; - btScalar delta = mrg / std::sqrt(0.5*std::abs(x13.cross(x23).safeNorm())); - bary = btVector3(w1,w2,w3); - for (int i = 0; i < 3; ++i) - { - if (bary[i] < -delta || bary[i] > 1+delta) - return false; - } - return true; + btVector3 x43 = x4 - x3; + if (std::abs(x43.dot(normal)) > mrg) + return false; + btVector3 x13 = x1 - x3; + btVector3 x23 = x2 - x3; + btScalar a11 = x13.length2(); + btScalar a22 = x23.length2(); + btScalar a12 = x13.dot(x23); + btScalar b1 = x13.dot(x43); + btScalar b2 = x23.dot(x43); + btScalar det = a11 * a22 - a12 * a12; + if (det < SIMD_EPSILON) + return false; + btScalar w1 = (b1 * a22 - b2 * a12) / det; + btScalar w2 = (b2 * a11 - b1 * a12) / det; + btScalar w3 = 1 - w1 - w2; + btScalar delta = mrg / std::sqrt(0.5 * std::abs(x13.cross(x23).safeNorm())); + bary = btVector3(w1, w2, w3); + for (int i = 0; i < 3; ++i) + { + if (bary[i] < -delta || bary[i] > 1 + delta) + return false; + } + return true; } static const int KDOP_COUNT = 13; -static btVector3 dop[KDOP_COUNT]={btVector3(1,0,0), - btVector3(0,1,0), - btVector3(0,0,1), - btVector3(1,1,0), - btVector3(1,0,1), - btVector3(0,1,1), - btVector3(1,-1,0), - btVector3(1,0,-1), - btVector3(0,1,-1), - btVector3(1,1,1), - btVector3(1,-1,1), - btVector3(1,1,-1), - btVector3(1,-1,-1) -}; +static btVector3 dop[KDOP_COUNT] = {btVector3(1, 0, 0), + btVector3(0, 1, 0), + btVector3(0, 0, 1), + btVector3(1, 1, 0), + btVector3(1, 0, 1), + btVector3(0, 1, 1), + btVector3(1, -1, 0), + btVector3(1, 0, -1), + btVector3(0, 1, -1), + btVector3(1, 1, 1), + btVector3(1, -1, 1), + btVector3(1, 1, -1), + btVector3(1, -1, -1)}; static inline int getSign(const btVector3& n, const btVector3& x) { btScalar d = n.dot(x); - if (d>SIMD_EPSILON) + if (d > SIMD_EPSILON) return 1; - if (d<-SIMD_EPSILON) + if (d < -SIMD_EPSILON) return -1; return 0; } @@ -119,13 +118,12 @@ static inline int getSign(const btVector3& n, const btVector3& x) static SIMD_FORCE_INLINE bool hasSeparatingPlane(const btSoftBody::Face* face, const btSoftBody::Node* node, const btScalar& dt) { btVector3 hex[6] = {face->m_n[0]->m_x - node->m_x, - face->m_n[1]->m_x - node->m_x, - face->m_n[2]->m_x - node->m_x, - face->m_n[0]->m_x + dt*face->m_n[0]->m_v - node->m_x, - face->m_n[1]->m_x + dt*face->m_n[1]->m_v - node->m_x, - face->m_n[2]->m_x + dt*face->m_n[2]->m_v - node->m_x - }; - btVector3 segment = dt*node->m_v; + face->m_n[1]->m_x - node->m_x, + face->m_n[2]->m_x - node->m_x, + face->m_n[0]->m_x + dt * face->m_n[0]->m_v - node->m_x, + face->m_n[1]->m_x + dt * face->m_n[1]->m_v - node->m_x, + face->m_n[2]->m_x + dt * face->m_n[2]->m_v - node->m_x}; + btVector3 segment = dt * node->m_v; for (int i = 0; i < KDOP_COUNT; ++i) { int s = getSign(dop[i], segment); @@ -143,488 +141,494 @@ static SIMD_FORCE_INLINE bool hasSeparatingPlane(const btSoftBody::Face* face, c static SIMD_FORCE_INLINE bool nearZero(const btScalar& a) { - return (a>-SAFE_EPSILON && a<SAFE_EPSILON); + return (a > -SAFE_EPSILON && a < SAFE_EPSILON); } static SIMD_FORCE_INLINE bool sameSign(const btScalar& a, const btScalar& b) { - return (nearZero(a) || nearZero(b) || (a>SAFE_EPSILON && b>SAFE_EPSILON) || (a<-SAFE_EPSILON && b<-SAFE_EPSILON)); + return (nearZero(a) || nearZero(b) || (a > SAFE_EPSILON && b > SAFE_EPSILON) || (a < -SAFE_EPSILON && b < -SAFE_EPSILON)); } static SIMD_FORCE_INLINE bool diffSign(const btScalar& a, const btScalar& b) { - return !sameSign(a, b); -} -inline btScalar evaluateBezier2(const btScalar &p0, const btScalar &p1, const btScalar &p2, const btScalar &t, const btScalar &s) -{ - btScalar s2 = s*s; - btScalar t2 = t*t; - - return p0*s2+p1*btScalar(2.0)*s*t+p2*t2; -} -inline btScalar evaluateBezier(const btScalar &p0, const btScalar &p1, const btScalar &p2, const btScalar &p3, const btScalar &t, const btScalar &s) -{ - btScalar s2 = s*s; - btScalar s3 = s2*s; - btScalar t2 = t*t; - btScalar t3 = t2*t; - - return p0*s3+p1*btScalar(3.0)*s2*t+p2*btScalar(3.0)*s*t2+p3*t3; -} -static SIMD_FORCE_INLINE bool getSigns(bool type_c, const btScalar& k0, const btScalar& k1, const btScalar& k2, const btScalar& k3, const btScalar& t0, const btScalar& t1, btScalar <0, btScalar <1) -{ - if (sameSign(t0, t1)) { - lt0 = t0; - lt1 = t0; - return true; - } - - if (type_c || diffSign(k0, k3)) { - btScalar ft = evaluateBezier(k0, k1, k2, k3, t0, -t1); - if (t0<-0) - ft = -ft; - - if (sameSign(ft, k0)) { - lt0 = t1; - lt1 = t1; - } - else { - lt0 = t0; - lt1 = t0; - } - return true; - } - - if (!type_c) { - btScalar ft = evaluateBezier(k0, k1, k2, k3, t0, -t1); - if (t0<-0) - ft = -ft; - - if (diffSign(ft, k0)) { - lt0 = t0; - lt1 = t1; - return true; - } - - btScalar fk = evaluateBezier2(k1-k0, k2-k1, k3-k2, t0, -t1); - - if (sameSign(fk, k1-k0)) - lt0 = lt1 = t1; - else - lt0 = lt1 = t0; - - return true; - } - return false; + return !sameSign(a, b); +} +inline btScalar evaluateBezier2(const btScalar& p0, const btScalar& p1, const btScalar& p2, const btScalar& t, const btScalar& s) +{ + btScalar s2 = s * s; + btScalar t2 = t * t; + + return p0 * s2 + p1 * btScalar(2.0) * s * t + p2 * t2; +} +inline btScalar evaluateBezier(const btScalar& p0, const btScalar& p1, const btScalar& p2, const btScalar& p3, const btScalar& t, const btScalar& s) +{ + btScalar s2 = s * s; + btScalar s3 = s2 * s; + btScalar t2 = t * t; + btScalar t3 = t2 * t; + + return p0 * s3 + p1 * btScalar(3.0) * s2 * t + p2 * btScalar(3.0) * s * t2 + p3 * t3; +} +static SIMD_FORCE_INLINE bool getSigns(bool type_c, const btScalar& k0, const btScalar& k1, const btScalar& k2, const btScalar& k3, const btScalar& t0, const btScalar& t1, btScalar& lt0, btScalar& lt1) +{ + if (sameSign(t0, t1)) + { + lt0 = t0; + lt1 = t0; + return true; + } + + if (type_c || diffSign(k0, k3)) + { + btScalar ft = evaluateBezier(k0, k1, k2, k3, t0, -t1); + if (t0 < -0) + ft = -ft; + + if (sameSign(ft, k0)) + { + lt0 = t1; + lt1 = t1; + } + else + { + lt0 = t0; + lt1 = t0; + } + return true; + } + + if (!type_c) + { + btScalar ft = evaluateBezier(k0, k1, k2, k3, t0, -t1); + if (t0 < -0) + ft = -ft; + + if (diffSign(ft, k0)) + { + lt0 = t0; + lt1 = t1; + return true; + } + + btScalar fk = evaluateBezier2(k1 - k0, k2 - k1, k3 - k2, t0, -t1); + + if (sameSign(fk, k1 - k0)) + lt0 = lt1 = t1; + else + lt0 = lt1 = t0; + + return true; + } + return false; } static SIMD_FORCE_INLINE void getBernsteinCoeff(const btSoftBody::Face* face, const btSoftBody::Node* node, const btScalar& dt, btScalar& k0, btScalar& k1, btScalar& k2, btScalar& k3) { - const btVector3& n0 = face->m_n0; - const btVector3& n1 = face->m_n1; - btVector3 n_hat = n0 + n1 - face->m_vn; - btVector3 p0ma0 = node->m_x - face->m_n[0]->m_x; - btVector3 p1ma1 = node->m_q - face->m_n[0]->m_q; - k0 = (p0ma0).dot(n0) * 3.0; - k1 = (p0ma0).dot(n_hat) + (p1ma1).dot(n0); - k2 = (p1ma1).dot(n_hat) + (p0ma0).dot(n1); - k3 = (p1ma1).dot(n1) * 3.0; + const btVector3& n0 = face->m_n0; + const btVector3& n1 = face->m_n1; + btVector3 n_hat = n0 + n1 - face->m_vn; + btVector3 p0ma0 = node->m_x - face->m_n[0]->m_x; + btVector3 p1ma1 = node->m_q - face->m_n[0]->m_q; + k0 = (p0ma0).dot(n0) * 3.0; + k1 = (p0ma0).dot(n_hat) + (p1ma1).dot(n0); + k2 = (p1ma1).dot(n_hat) + (p0ma0).dot(n1); + k3 = (p1ma1).dot(n1) * 3.0; } static SIMD_FORCE_INLINE void polyDecomposition(const btScalar& k0, const btScalar& k1, const btScalar& k2, const btScalar& k3, const btScalar& j0, const btScalar& j1, const btScalar& j2, btScalar& u0, btScalar& u1, btScalar& v0, btScalar& v1) { - btScalar denom = 4.0 * (j1-j2) * (j1-j0) + (j2-j0) * (j2-j0); - u0 = (2.0*(j1-j2)*(3.0*k1-2.0*k0-k3) - (j0-j2)*(3.0*k2-2.0*k3-k0)) / denom; - u1 = (2.0*(j1-j0)*(3.0*k2-2.0*k3-k0) - (j2-j0)*(3.0*k1-2.0*k0-k3)) / denom; - v0 = k0-u0*j0; - v1 = k3-u1*j2; + btScalar denom = 4.0 * (j1 - j2) * (j1 - j0) + (j2 - j0) * (j2 - j0); + u0 = (2.0 * (j1 - j2) * (3.0 * k1 - 2.0 * k0 - k3) - (j0 - j2) * (3.0 * k2 - 2.0 * k3 - k0)) / denom; + u1 = (2.0 * (j1 - j0) * (3.0 * k2 - 2.0 * k3 - k0) - (j2 - j0) * (3.0 * k1 - 2.0 * k0 - k3)) / denom; + v0 = k0 - u0 * j0; + v1 = k3 - u1 * j2; } static SIMD_FORCE_INLINE bool rootFindingLemma(const btScalar& k0, const btScalar& k1, const btScalar& k2, const btScalar& k3) { - btScalar u0, u1, v0, v1; - btScalar j0 = 3.0*(k1-k0); - btScalar j1 = 3.0*(k2-k1); - btScalar j2 = 3.0*(k3-k2); - polyDecomposition(k0,k1,k2,k3,j0,j1,j2,u0,u1,v0,v1); - if (sameSign(v0, v1)) - { - btScalar Ypa = j0*(1.0-v0)*(1.0-v0) + 2.0*j1*v0*(1.0-v0) + j2*v0*v0; // Y'(v0) - if (sameSign(Ypa, j0)) - { - return (diffSign(k0,v1)); - } - } - return diffSign(k0,v0); -} - -static SIMD_FORCE_INLINE void getJs(const btScalar& k0, const btScalar& k1, const btScalar& k2, const btScalar& k3, const btSoftBody::Node* a, const btSoftBody::Node* b, const btSoftBody::Node* c, const btSoftBody::Node* p, const btScalar& dt, btScalar& j0, btScalar& j1, btScalar& j2) -{ - const btVector3& a0 = a->m_x; - const btVector3& b0 = b->m_x; - const btVector3& c0 = c->m_x; - const btVector3& va = a->m_v; - const btVector3& vb = b->m_v; - const btVector3& vc = c->m_v; - const btVector3 a1 = a0 + dt*va; - const btVector3 b1 = b0 + dt*vb; - const btVector3 c1 = c0 + dt*vc; - btVector3 n0 = (b0-a0).cross(c0-a0); - btVector3 n1 = (b1-a1).cross(c1-a1); - btVector3 n_hat = n0+n1 - dt*dt*(vb-va).cross(vc-va); - const btVector3& p0 = p->m_x; - const btVector3& vp = p->m_v; - btVector3 p1 = p0 + dt*vp; - btVector3 m0 = (b0-p0).cross(c0-p0); - btVector3 m1 = (b1-p1).cross(c1-p1); - btVector3 m_hat = m0+m1 - dt*dt*(vb-vp).cross(vc-vp); - btScalar l0 = m0.dot(n0); - btScalar l1 = 0.25 * (m0.dot(n_hat) + m_hat.dot(n0)); - btScalar l2 = btScalar(1)/btScalar(6)*(m0.dot(n1) + m_hat.dot(n_hat) + m1.dot(n0)); - btScalar l3 = 0.25 * (m_hat.dot(n1) + m1.dot(n_hat)); - btScalar l4 = m1.dot(n1); - - btScalar k1p = 0.25 * k0 + 0.75 * k1; - btScalar k2p = 0.5 * k1 + 0.5 * k2; - btScalar k3p = 0.75 * k2 + 0.25 * k3; - - btScalar s0 = (l1 * k0 - l0 * k1p)*4.0; - btScalar s1 = (l2 * k0 - l0 * k2p)*2.0; - btScalar s2 = (l3 * k0 - l0 * k3p)*btScalar(4)/btScalar(3); - btScalar s3 = l4 * k0 - l0 * k3; - - j0 = (s1*k0 - s0*k1) * 3.0; - j1 = (s2*k0 - s0*k2) * 1.5; - j2 = (s3*k0 - s0*k3); + btScalar u0, u1, v0, v1; + btScalar j0 = 3.0 * (k1 - k0); + btScalar j1 = 3.0 * (k2 - k1); + btScalar j2 = 3.0 * (k3 - k2); + polyDecomposition(k0, k1, k2, k3, j0, j1, j2, u0, u1, v0, v1); + if (sameSign(v0, v1)) + { + btScalar Ypa = j0 * (1.0 - v0) * (1.0 - v0) + 2.0 * j1 * v0 * (1.0 - v0) + j2 * v0 * v0; // Y'(v0) + if (sameSign(Ypa, j0)) + { + return (diffSign(k0, v1)); + } + } + return diffSign(k0, v0); +} + +static SIMD_FORCE_INLINE void getJs(const btScalar& k0, const btScalar& k1, const btScalar& k2, const btScalar& k3, const btSoftBody::Node* a, const btSoftBody::Node* b, const btSoftBody::Node* c, const btSoftBody::Node* p, const btScalar& dt, btScalar& j0, btScalar& j1, btScalar& j2) +{ + const btVector3& a0 = a->m_x; + const btVector3& b0 = b->m_x; + const btVector3& c0 = c->m_x; + const btVector3& va = a->m_v; + const btVector3& vb = b->m_v; + const btVector3& vc = c->m_v; + const btVector3 a1 = a0 + dt * va; + const btVector3 b1 = b0 + dt * vb; + const btVector3 c1 = c0 + dt * vc; + btVector3 n0 = (b0 - a0).cross(c0 - a0); + btVector3 n1 = (b1 - a1).cross(c1 - a1); + btVector3 n_hat = n0 + n1 - dt * dt * (vb - va).cross(vc - va); + const btVector3& p0 = p->m_x; + const btVector3& vp = p->m_v; + btVector3 p1 = p0 + dt * vp; + btVector3 m0 = (b0 - p0).cross(c0 - p0); + btVector3 m1 = (b1 - p1).cross(c1 - p1); + btVector3 m_hat = m0 + m1 - dt * dt * (vb - vp).cross(vc - vp); + btScalar l0 = m0.dot(n0); + btScalar l1 = 0.25 * (m0.dot(n_hat) + m_hat.dot(n0)); + btScalar l2 = btScalar(1) / btScalar(6) * (m0.dot(n1) + m_hat.dot(n_hat) + m1.dot(n0)); + btScalar l3 = 0.25 * (m_hat.dot(n1) + m1.dot(n_hat)); + btScalar l4 = m1.dot(n1); + + btScalar k1p = 0.25 * k0 + 0.75 * k1; + btScalar k2p = 0.5 * k1 + 0.5 * k2; + btScalar k3p = 0.75 * k2 + 0.25 * k3; + + btScalar s0 = (l1 * k0 - l0 * k1p) * 4.0; + btScalar s1 = (l2 * k0 - l0 * k2p) * 2.0; + btScalar s2 = (l3 * k0 - l0 * k3p) * btScalar(4) / btScalar(3); + btScalar s3 = l4 * k0 - l0 * k3; + + j0 = (s1 * k0 - s0 * k1) * 3.0; + j1 = (s2 * k0 - s0 * k2) * 1.5; + j2 = (s3 * k0 - s0 * k3); } static SIMD_FORCE_INLINE bool signDetermination1Internal(const btScalar& k0, const btScalar& k1, const btScalar& k2, const btScalar& k3, const btScalar& u0, const btScalar& u1, const btScalar& v0, const btScalar& v1) { - btScalar Yu0 = k0*(1.0-u0)*(1.0-u0)*(1.0-u0) + 3.0*k1*u0*(1.0-u0)*(1.0-u0) + 3.0*k2*u0*u0*(1.0-u0) + k3*u0*u0*u0; // Y(u0) - btScalar Yv0 = k0*(1.0-v0)*(1.0-v0)*(1.0-v0) + 3.0*k1*v0*(1.0-v0)*(1.0-v0) + 3.0*k2*v0*v0*(1.0-v0) + k3*v0*v0*v0; // Y(v0) + btScalar Yu0 = k0 * (1.0 - u0) * (1.0 - u0) * (1.0 - u0) + 3.0 * k1 * u0 * (1.0 - u0) * (1.0 - u0) + 3.0 * k2 * u0 * u0 * (1.0 - u0) + k3 * u0 * u0 * u0; // Y(u0) + btScalar Yv0 = k0 * (1.0 - v0) * (1.0 - v0) * (1.0 - v0) + 3.0 * k1 * v0 * (1.0 - v0) * (1.0 - v0) + 3.0 * k2 * v0 * v0 * (1.0 - v0) + k3 * v0 * v0 * v0; // Y(v0) - btScalar sign_Ytp = (u0 > u1) ? Yu0 : -Yu0; - btScalar L = sameSign(sign_Ytp, k0) ? u1 : u0; - sign_Ytp = (v0 > v1) ? Yv0 : -Yv0; - btScalar K = (sameSign(sign_Ytp,k0)) ? v1 : v0; - return diffSign(L,K); + btScalar sign_Ytp = (u0 > u1) ? Yu0 : -Yu0; + btScalar L = sameSign(sign_Ytp, k0) ? u1 : u0; + sign_Ytp = (v0 > v1) ? Yv0 : -Yv0; + btScalar K = (sameSign(sign_Ytp, k0)) ? v1 : v0; + return diffSign(L, K); } static SIMD_FORCE_INLINE bool signDetermination2Internal(const btScalar& k0, const btScalar& k1, const btScalar& k2, const btScalar& k3, const btScalar& j0, const btScalar& j1, const btScalar& j2, const btScalar& u0, const btScalar& u1, const btScalar& v0, const btScalar& v1) { - btScalar Yu0 = k0*(1.0-u0)*(1.0-u0)*(1.0-u0) + 3.0*k1*u0*(1.0-u0)*(1.0-u0) + 3.0*k2*u0*u0*(1.0-u0) + k3*u0*u0*u0; // Y(u0) - btScalar sign_Ytp = (u0 > u1) ? Yu0 : -Yu0, L1, L2; - if (diffSign(sign_Ytp,k0)) - { - L1 = u0; - L2 = u1; - } - else - { - btScalar Yp_u0 = j0*(1.0-u0)*(1.0-u0) + 2.0*j1*(1.0-u0)*u0 + j2*u0*u0; - if (sameSign(Yp_u0,j0)) - { - L1 = u1; - L2 = u1; - } - else - { - L1 = u0; - L2 = u0; - } - } - btScalar Yv0 = k0*(1.0-v0)*(1.0-v0)*(1.0-v0) + 3.0*k1*v0*(1.0-v0)*(1.0-v0) + 3.0*k2*v0*v0*(1.0-v0) + k3*v0*v0*v0; // Y(uv0) - sign_Ytp = (v0 > v1) ? Yv0 : -Yv0; - btScalar K1, K2; - if (diffSign(sign_Ytp,k0)) - { - K1 = v0; - K2 = v1; - } - else - { - btScalar Yp_v0 = j0*(1.0-v0)*(1.0-v0) + 2.0*j1*(1.0-v0)*v0 + j2*v0*v0; - if (sameSign(Yp_v0,j0)) - { - K1 = v1; - K2 = v1; - } - else - { - K1 = v0; - K2 = v0; - } - } - return (diffSign(K1, L1) || diffSign(L2, K2)); + btScalar Yu0 = k0 * (1.0 - u0) * (1.0 - u0) * (1.0 - u0) + 3.0 * k1 * u0 * (1.0 - u0) * (1.0 - u0) + 3.0 * k2 * u0 * u0 * (1.0 - u0) + k3 * u0 * u0 * u0; // Y(u0) + btScalar sign_Ytp = (u0 > u1) ? Yu0 : -Yu0, L1, L2; + if (diffSign(sign_Ytp, k0)) + { + L1 = u0; + L2 = u1; + } + else + { + btScalar Yp_u0 = j0 * (1.0 - u0) * (1.0 - u0) + 2.0 * j1 * (1.0 - u0) * u0 + j2 * u0 * u0; + if (sameSign(Yp_u0, j0)) + { + L1 = u1; + L2 = u1; + } + else + { + L1 = u0; + L2 = u0; + } + } + btScalar Yv0 = k0 * (1.0 - v0) * (1.0 - v0) * (1.0 - v0) + 3.0 * k1 * v0 * (1.0 - v0) * (1.0 - v0) + 3.0 * k2 * v0 * v0 * (1.0 - v0) + k3 * v0 * v0 * v0; // Y(uv0) + sign_Ytp = (v0 > v1) ? Yv0 : -Yv0; + btScalar K1, K2; + if (diffSign(sign_Ytp, k0)) + { + K1 = v0; + K2 = v1; + } + else + { + btScalar Yp_v0 = j0 * (1.0 - v0) * (1.0 - v0) + 2.0 * j1 * (1.0 - v0) * v0 + j2 * v0 * v0; + if (sameSign(Yp_v0, j0)) + { + K1 = v1; + K2 = v1; + } + else + { + K1 = v0; + K2 = v0; + } + } + return (diffSign(K1, L1) || diffSign(L2, K2)); } static SIMD_FORCE_INLINE bool signDetermination1(const btScalar& k0, const btScalar& k1, const btScalar& k2, const btScalar& k3, const btSoftBody::Face* face, const btSoftBody::Node* node, const btScalar& dt) { - btScalar j0, j1, j2, u0, u1, v0, v1; - // p1 - getJs(k0,k1,k2,k3,face->m_n[0], face->m_n[1], face->m_n[2], node, dt, j0, j1, j2); - if (nearZero(j0+j2-j1*2.0)) - { - btScalar lt0, lt1; - getSigns(true, k0, k1, k2, k3, j0, j2, lt0, lt1); - if (lt0 < -SAFE_EPSILON) - return false; - } - else - { - polyDecomposition(k0,k1,k2,k3,j0,j1,j2,u0,u1,v0,v1); - if (!signDetermination1Internal(k0,k1,k2,k3,u0,u1,v0,v1)) - return false; - } - // p2 - getJs(k0,k1,k2,k3,face->m_n[1], face->m_n[2], face->m_n[0], node, dt, j0, j1, j2); - if (nearZero(j0+j2-j1*2.0)) - { - btScalar lt0, lt1; - getSigns(true, k0, k1, k2, k3, j0, j2, lt0, lt1); - if (lt0 < -SAFE_EPSILON) - return false; - } - else - { - polyDecomposition(k0,k1,k2,k3,j0,j1,j2,u0,u1,v0,v1); - if (!signDetermination1Internal(k0,k1,k2,k3,u0,u1,v0,v1)) - return false; - } - // p3 - getJs(k0,k1,k2,k3,face->m_n[2], face->m_n[0], face->m_n[1], node, dt, j0, j1, j2); - if (nearZero(j0+j2-j1*2.0)) - { - btScalar lt0, lt1; - getSigns(true, k0, k1, k2, k3, j0, j2, lt0, lt1); - if (lt0 < -SAFE_EPSILON) - return false; - } - else - { - polyDecomposition(k0,k1,k2,k3,j0,j1,j2,u0,u1,v0,v1); - if (!signDetermination1Internal(k0,k1,k2,k3,u0,u1,v0,v1)) - return false; - } - return true; + btScalar j0, j1, j2, u0, u1, v0, v1; + // p1 + getJs(k0, k1, k2, k3, face->m_n[0], face->m_n[1], face->m_n[2], node, dt, j0, j1, j2); + if (nearZero(j0 + j2 - j1 * 2.0)) + { + btScalar lt0, lt1; + getSigns(true, k0, k1, k2, k3, j0, j2, lt0, lt1); + if (lt0 < -SAFE_EPSILON) + return false; + } + else + { + polyDecomposition(k0, k1, k2, k3, j0, j1, j2, u0, u1, v0, v1); + if (!signDetermination1Internal(k0, k1, k2, k3, u0, u1, v0, v1)) + return false; + } + // p2 + getJs(k0, k1, k2, k3, face->m_n[1], face->m_n[2], face->m_n[0], node, dt, j0, j1, j2); + if (nearZero(j0 + j2 - j1 * 2.0)) + { + btScalar lt0, lt1; + getSigns(true, k0, k1, k2, k3, j0, j2, lt0, lt1); + if (lt0 < -SAFE_EPSILON) + return false; + } + else + { + polyDecomposition(k0, k1, k2, k3, j0, j1, j2, u0, u1, v0, v1); + if (!signDetermination1Internal(k0, k1, k2, k3, u0, u1, v0, v1)) + return false; + } + // p3 + getJs(k0, k1, k2, k3, face->m_n[2], face->m_n[0], face->m_n[1], node, dt, j0, j1, j2); + if (nearZero(j0 + j2 - j1 * 2.0)) + { + btScalar lt0, lt1; + getSigns(true, k0, k1, k2, k3, j0, j2, lt0, lt1); + if (lt0 < -SAFE_EPSILON) + return false; + } + else + { + polyDecomposition(k0, k1, k2, k3, j0, j1, j2, u0, u1, v0, v1); + if (!signDetermination1Internal(k0, k1, k2, k3, u0, u1, v0, v1)) + return false; + } + return true; } static SIMD_FORCE_INLINE bool signDetermination2(const btScalar& k0, const btScalar& k1, const btScalar& k2, const btScalar& k3, const btSoftBody::Face* face, const btSoftBody::Node* node, const btScalar& dt) { - btScalar j0, j1, j2, u0, u1, v0, v1; - // p1 - getJs(k0,k1,k2,k3,face->m_n[0], face->m_n[1], face->m_n[2], node, dt, j0, j1, j2); - if (nearZero(j0+j2-j1*2.0)) - { - btScalar lt0, lt1; - bool bt0 = true, bt1=true; - getSigns(false, k0, k1, k2, k3, j0, j2, lt0, lt1); - if (lt0 < -SAFE_EPSILON) - bt0 = false; - if (lt1 < -SAFE_EPSILON) - bt1 = false; - if (!bt0 && !bt1) - return false; - } - else - { - polyDecomposition(k0,k1,k2,k3,j0,j1,j2,u0,u1,v0,v1); - if (!signDetermination2Internal(k0,k1,k2,k3,j0,j1,j2,u0,u1,v0,v1)) - return false; - } - // p2 - getJs(k0,k1,k2,k3,face->m_n[1], face->m_n[2], face->m_n[0], node, dt, j0, j1, j2); - if (nearZero(j0+j2-j1*2.0)) - { - btScalar lt0, lt1; - bool bt0=true, bt1=true; - getSigns(false, k0, k1, k2, k3, j0, j2, lt0, lt1); - if (lt0 < -SAFE_EPSILON) - bt0 = false; - if (lt1 < -SAFE_EPSILON) - bt1 = false; - if (!bt0 && !bt1) - return false; - } - else - { - polyDecomposition(k0,k1,k2,k3,j0,j1,j2,u0,u1,v0,v1); - if (!signDetermination2Internal(k0,k1,k2,k3,j0,j1,j2,u0,u1,v0,v1)) - return false; - } - // p3 - getJs(k0,k1,k2,k3,face->m_n[2], face->m_n[0], face->m_n[1], node, dt, j0, j1, j2); - if (nearZero(j0+j2-j1*2.0)) - { - btScalar lt0, lt1; - bool bt0=true, bt1=true; - getSigns(false, k0, k1, k2, k3, j0, j2, lt0, lt1); - if (lt0 < -SAFE_EPSILON) - bt0 = false; - if (lt1 < -SAFE_EPSILON) - bt1 = false; - if (!bt0 && !bt1) - return false; - } - else - { - polyDecomposition(k0,k1,k2,k3,j0,j1,j2,u0,u1,v0,v1); - if (!signDetermination2Internal(k0,k1,k2,k3,j0,j1,j2,u0,u1,v0,v1)) - return false; - } - return true; + btScalar j0, j1, j2, u0, u1, v0, v1; + // p1 + getJs(k0, k1, k2, k3, face->m_n[0], face->m_n[1], face->m_n[2], node, dt, j0, j1, j2); + if (nearZero(j0 + j2 - j1 * 2.0)) + { + btScalar lt0, lt1; + bool bt0 = true, bt1 = true; + getSigns(false, k0, k1, k2, k3, j0, j2, lt0, lt1); + if (lt0 < -SAFE_EPSILON) + bt0 = false; + if (lt1 < -SAFE_EPSILON) + bt1 = false; + if (!bt0 && !bt1) + return false; + } + else + { + polyDecomposition(k0, k1, k2, k3, j0, j1, j2, u0, u1, v0, v1); + if (!signDetermination2Internal(k0, k1, k2, k3, j0, j1, j2, u0, u1, v0, v1)) + return false; + } + // p2 + getJs(k0, k1, k2, k3, face->m_n[1], face->m_n[2], face->m_n[0], node, dt, j0, j1, j2); + if (nearZero(j0 + j2 - j1 * 2.0)) + { + btScalar lt0, lt1; + bool bt0 = true, bt1 = true; + getSigns(false, k0, k1, k2, k3, j0, j2, lt0, lt1); + if (lt0 < -SAFE_EPSILON) + bt0 = false; + if (lt1 < -SAFE_EPSILON) + bt1 = false; + if (!bt0 && !bt1) + return false; + } + else + { + polyDecomposition(k0, k1, k2, k3, j0, j1, j2, u0, u1, v0, v1); + if (!signDetermination2Internal(k0, k1, k2, k3, j0, j1, j2, u0, u1, v0, v1)) + return false; + } + // p3 + getJs(k0, k1, k2, k3, face->m_n[2], face->m_n[0], face->m_n[1], node, dt, j0, j1, j2); + if (nearZero(j0 + j2 - j1 * 2.0)) + { + btScalar lt0, lt1; + bool bt0 = true, bt1 = true; + getSigns(false, k0, k1, k2, k3, j0, j2, lt0, lt1); + if (lt0 < -SAFE_EPSILON) + bt0 = false; + if (lt1 < -SAFE_EPSILON) + bt1 = false; + if (!bt0 && !bt1) + return false; + } + else + { + polyDecomposition(k0, k1, k2, k3, j0, j1, j2, u0, u1, v0, v1); + if (!signDetermination2Internal(k0, k1, k2, k3, j0, j1, j2, u0, u1, v0, v1)) + return false; + } + return true; } static SIMD_FORCE_INLINE bool coplanarAndInsideTest(const btScalar& k0, const btScalar& k1, const btScalar& k2, const btScalar& k3, const btSoftBody::Face* face, const btSoftBody::Node* node, const btScalar& dt) { - // Coplanar test - if (diffSign(k1-k0, k3-k2)) - { - // Case b: - if (sameSign(k0, k3) && !rootFindingLemma(k0,k1,k2,k3)) - return false; - // inside test - return signDetermination2(k0, k1, k2, k3, face, node, dt); - } - else - { - // Case c: - if (sameSign(k0, k3)) - return false; - // inside test - return signDetermination1(k0, k1, k2, k3, face, node, dt); - } - return false; + // Coplanar test + if (diffSign(k1 - k0, k3 - k2)) + { + // Case b: + if (sameSign(k0, k3) && !rootFindingLemma(k0, k1, k2, k3)) + return false; + // inside test + return signDetermination2(k0, k1, k2, k3, face, node, dt); + } + else + { + // Case c: + if (sameSign(k0, k3)) + return false; + // inside test + return signDetermination1(k0, k1, k2, k3, face, node, dt); + } + return false; } static SIMD_FORCE_INLINE bool conservativeCulling(const btScalar& k0, const btScalar& k1, const btScalar& k2, const btScalar& k3, const btScalar& mrg) { - if (k0 > mrg && k1 > mrg && k2 > mrg && k3 > mrg) - return true; - if (k0 < -mrg && k1 < -mrg && k2 < -mrg && k3 < -mrg) - return true; - return false; + if (k0 > mrg && k1 > mrg && k2 > mrg && k3 > mrg) + return true; + if (k0 < -mrg && k1 < -mrg && k2 < -mrg && k3 < -mrg) + return true; + return false; } static SIMD_FORCE_INLINE bool bernsteinVFTest(const btScalar& k0, const btScalar& k1, const btScalar& k2, const btScalar& k3, const btScalar& mrg, const btSoftBody::Face* face, const btSoftBody::Node* node, const btScalar& dt) { - if (conservativeCulling(k0, k1, k2, k3, mrg)) - return false; - return coplanarAndInsideTest(k0, k1, k2, k3, face, node, dt); + if (conservativeCulling(k0, k1, k2, k3, mrg)) + return false; + return coplanarAndInsideTest(k0, k1, k2, k3, face, node, dt); } static SIMD_FORCE_INLINE void deCasteljau(const btScalar& k0, const btScalar& k1, const btScalar& k2, const btScalar& k3, const btScalar& t0, btScalar& k10, btScalar& k20, btScalar& k30, btScalar& k21, btScalar& k12) { - k10 = k0*(1.0-t0) + k1*t0; - btScalar k11 = k1*(1.0-t0) + k2*t0; - k12 = k2*(1.0-t0) + k3*t0; - k20 = k10*(1.0-t0) + k11*t0; - k21 = k11*(1.0-t0) + k12*t0; - k30 = k20*(1.0-t0) + k21*t0; + k10 = k0 * (1.0 - t0) + k1 * t0; + btScalar k11 = k1 * (1.0 - t0) + k2 * t0; + k12 = k2 * (1.0 - t0) + k3 * t0; + k20 = k10 * (1.0 - t0) + k11 * t0; + k21 = k11 * (1.0 - t0) + k12 * t0; + k30 = k20 * (1.0 - t0) + k21 * t0; } static SIMD_FORCE_INLINE bool bernsteinVFTest(const btSoftBody::Face* face, const btSoftBody::Node* node, const btScalar& dt, const btScalar& mrg) { - btScalar k0, k1, k2, k3; - getBernsteinCoeff(face, node, dt, k0, k1, k2, k3); - if (conservativeCulling(k0, k1, k2, k3, mrg)) - return false; - return true; - if (diffSign(k2-2.0*k1+k0, k3-2.0*k2+k1)) - { - btScalar k10, k20, k30, k21, k12; - btScalar t0 = (k2-2.0*k1+k0)/(k0-3.0*k1+3.0*k2-k3); - deCasteljau(k0, k1, k2, k3, t0, k10, k20, k30, k21, k12); - return bernsteinVFTest(k0, k10, k20, k30, mrg, face, node, dt) || bernsteinVFTest(k30, k21, k12, k3, mrg, face, node, dt); - } - return coplanarAndInsideTest(k0, k1, k2, k3, face, node, dt); + btScalar k0, k1, k2, k3; + getBernsteinCoeff(face, node, dt, k0, k1, k2, k3); + if (conservativeCulling(k0, k1, k2, k3, mrg)) + return false; + return true; + if (diffSign(k2 - 2.0 * k1 + k0, k3 - 2.0 * k2 + k1)) + { + btScalar k10, k20, k30, k21, k12; + btScalar t0 = (k2 - 2.0 * k1 + k0) / (k0 - 3.0 * k1 + 3.0 * k2 - k3); + deCasteljau(k0, k1, k2, k3, t0, k10, k20, k30, k21, k12); + return bernsteinVFTest(k0, k10, k20, k30, mrg, face, node, dt) || bernsteinVFTest(k30, k21, k12, k3, mrg, face, node, dt); + } + return coplanarAndInsideTest(k0, k1, k2, k3, face, node, dt); } static SIMD_FORCE_INLINE bool continuousCollisionDetection(const btSoftBody::Face* face, const btSoftBody::Node* node, const btScalar& dt, const btScalar& mrg, btVector3& bary) { - if (hasSeparatingPlane(face, node, dt)) - return false; - btVector3 x21 = face->m_n[1]->m_x - face->m_n[0]->m_x; - btVector3 x31 = face->m_n[2]->m_x - face->m_n[0]->m_x; - btVector3 x41 = node->m_x - face->m_n[0]->m_x; - btVector3 v21 = face->m_n[1]->m_v - face->m_n[0]->m_v; - btVector3 v31 = face->m_n[2]->m_v - face->m_n[0]->m_v; - btVector3 v41 = node->m_v - face->m_n[0]->m_v; - btVector3 a = x21.cross(x31); - btVector3 b = x21.cross(v31) + v21.cross(x31); - btVector3 c = v21.cross(v31); - btVector3 d = x41; - btVector3 e = v41; - btScalar a0 = a.dot(d); - btScalar a1 = a.dot(e) + b.dot(d); - btScalar a2 = c.dot(d) + b.dot(e); - btScalar a3 = c.dot(e); - btScalar eps = SAFE_EPSILON; - int num_roots = 0; - btScalar roots[3]; - if (std::abs(a3) < eps) - { - // cubic term is zero - if (std::abs(a2) < eps) - { - if (std::abs(a1) < eps) - { - if (std::abs(a0) < eps) - { - num_roots = 2; - roots[0] = 0; - roots[1] = dt; - } - } - else - { - num_roots = 1; - roots[0] = -a0/a1; - } - } - else - { - num_roots = SolveP2(roots, a1/a2, a0/a2); - } - } - else - { - num_roots = SolveP3(roots, a2/a3, a1/a3, a0/a3); - } -// std::sort(roots, roots+num_roots); - if (num_roots > 1) - { - if (roots[0] > roots[1]) - btSwap(roots[0], roots[1]); - } - if (num_roots > 2) - { - if (roots[0] > roots[2]) - btSwap(roots[0], roots[2]); - if (roots[1] > roots[2]) - btSwap(roots[1], roots[2]); - } - for (int r = 0; r < num_roots; ++r) - { - double root = roots[r]; - if (root <= 0) - continue; - if (root > dt + SIMD_EPSILON) - return false; - btVector3 x1 = face->m_n[0]->m_x + root * face->m_n[0]->m_v; - btVector3 x2 = face->m_n[1]->m_x + root * face->m_n[1]->m_v; - btVector3 x3 = face->m_n[2]->m_x + root * face->m_n[2]->m_v; - btVector3 x4 = node->m_x + root * node->m_v; - btVector3 normal = (x2-x1).cross(x3-x1); - normal.safeNormalize(); - if (proximityTest(x1, x2, x3, x4, normal, mrg, bary)) - return true; - } - return false; + if (hasSeparatingPlane(face, node, dt)) + return false; + btVector3 x21 = face->m_n[1]->m_x - face->m_n[0]->m_x; + btVector3 x31 = face->m_n[2]->m_x - face->m_n[0]->m_x; + btVector3 x41 = node->m_x - face->m_n[0]->m_x; + btVector3 v21 = face->m_n[1]->m_v - face->m_n[0]->m_v; + btVector3 v31 = face->m_n[2]->m_v - face->m_n[0]->m_v; + btVector3 v41 = node->m_v - face->m_n[0]->m_v; + btVector3 a = x21.cross(x31); + btVector3 b = x21.cross(v31) + v21.cross(x31); + btVector3 c = v21.cross(v31); + btVector3 d = x41; + btVector3 e = v41; + btScalar a0 = a.dot(d); + btScalar a1 = a.dot(e) + b.dot(d); + btScalar a2 = c.dot(d) + b.dot(e); + btScalar a3 = c.dot(e); + btScalar eps = SAFE_EPSILON; + int num_roots = 0; + btScalar roots[3]; + if (std::abs(a3) < eps) + { + // cubic term is zero + if (std::abs(a2) < eps) + { + if (std::abs(a1) < eps) + { + if (std::abs(a0) < eps) + { + num_roots = 2; + roots[0] = 0; + roots[1] = dt; + } + } + else + { + num_roots = 1; + roots[0] = -a0 / a1; + } + } + else + { + num_roots = SolveP2(roots, a1 / a2, a0 / a2); + } + } + else + { + num_roots = SolveP3(roots, a2 / a3, a1 / a3, a0 / a3); + } + // std::sort(roots, roots+num_roots); + if (num_roots > 1) + { + if (roots[0] > roots[1]) + btSwap(roots[0], roots[1]); + } + if (num_roots > 2) + { + if (roots[0] > roots[2]) + btSwap(roots[0], roots[2]); + if (roots[1] > roots[2]) + btSwap(roots[1], roots[2]); + } + for (int r = 0; r < num_roots; ++r) + { + double root = roots[r]; + if (root <= 0) + continue; + if (root > dt + SIMD_EPSILON) + return false; + btVector3 x1 = face->m_n[0]->m_x + root * face->m_n[0]->m_v; + btVector3 x2 = face->m_n[1]->m_x + root * face->m_n[1]->m_v; + btVector3 x3 = face->m_n[2]->m_x + root * face->m_n[2]->m_v; + btVector3 x4 = node->m_x + root * node->m_v; + btVector3 normal = (x2 - x1).cross(x3 - x1); + normal.safeNormalize(); + if (proximityTest(x1, x2, x3, x4, normal, mrg, bary)) + return true; + } + return false; } static SIMD_FORCE_INLINE bool bernsteinCCD(const btSoftBody::Face* face, const btSoftBody::Node* node, const btScalar& dt, const btScalar& mrg, btVector3& bary) { - if (!bernsteinVFTest(face, node, dt, mrg)) - return false; - if (!continuousCollisionDetection(face, node, dt, 1e-6, bary)) - return false; - return true; + if (!bernsteinVFTest(face, node, dt, mrg)) + return false; + if (!continuousCollisionDetection(face, node, dt, 1e-6, bary)) + return false; + return true; } // @@ -902,62 +906,61 @@ static inline btMatrix3x3 Diagonal(btScalar x) static inline btMatrix3x3 Diagonal(const btVector3& v) { - btMatrix3x3 m; - m[0] = btVector3(v.getX(), 0, 0); - m[1] = btVector3(0, v.getY(), 0); - m[2] = btVector3(0, 0, v.getZ()); - return (m); -} - -static inline btScalar Dot(const btScalar* a,const btScalar* b, int ndof) -{ - btScalar result = 0; - for (int i = 0; i < ndof; ++i) - result += a[i] * b[i]; - return result; -} - -static inline btMatrix3x3 OuterProduct(const btScalar* v1,const btScalar* v2,const btScalar* v3, - const btScalar* u1, const btScalar* u2, const btScalar* u3, int ndof) -{ - btMatrix3x3 m; - btScalar a11 = Dot(v1,u1,ndof); - btScalar a12 = Dot(v1,u2,ndof); - btScalar a13 = Dot(v1,u3,ndof); - - btScalar a21 = Dot(v2,u1,ndof); - btScalar a22 = Dot(v2,u2,ndof); - btScalar a23 = Dot(v2,u3,ndof); - - btScalar a31 = Dot(v3,u1,ndof); - btScalar a32 = Dot(v3,u2,ndof); - btScalar a33 = Dot(v3,u3,ndof); - m[0] = btVector3(a11, a12, a13); - m[1] = btVector3(a21, a22, a23); - m[2] = btVector3(a31, a32, a33); - return (m); -} - -static inline btMatrix3x3 OuterProduct(const btVector3& v1,const btVector3& v2) -{ - btMatrix3x3 m; - btScalar a11 = v1[0] * v2[0]; - btScalar a12 = v1[0] * v2[1]; - btScalar a13 = v1[0] * v2[2]; - - btScalar a21 = v1[1] * v2[0]; - btScalar a22 = v1[1] * v2[1]; - btScalar a23 = v1[1] * v2[2]; - - btScalar a31 = v1[2] * v2[0]; - btScalar a32 = v1[2] * v2[1]; - btScalar a33 = v1[2] * v2[2]; - m[0] = btVector3(a11, a12, a13); - m[1] = btVector3(a21, a22, a23); - m[2] = btVector3(a31, a32, a33); - return (m); + btMatrix3x3 m; + m[0] = btVector3(v.getX(), 0, 0); + m[1] = btVector3(0, v.getY(), 0); + m[2] = btVector3(0, 0, v.getZ()); + return (m); +} + +static inline btScalar Dot(const btScalar* a, const btScalar* b, int ndof) +{ + btScalar result = 0; + for (int i = 0; i < ndof; ++i) + result += a[i] * b[i]; + return result; } +static inline btMatrix3x3 OuterProduct(const btScalar* v1, const btScalar* v2, const btScalar* v3, + const btScalar* u1, const btScalar* u2, const btScalar* u3, int ndof) +{ + btMatrix3x3 m; + btScalar a11 = Dot(v1, u1, ndof); + btScalar a12 = Dot(v1, u2, ndof); + btScalar a13 = Dot(v1, u3, ndof); + + btScalar a21 = Dot(v2, u1, ndof); + btScalar a22 = Dot(v2, u2, ndof); + btScalar a23 = Dot(v2, u3, ndof); + + btScalar a31 = Dot(v3, u1, ndof); + btScalar a32 = Dot(v3, u2, ndof); + btScalar a33 = Dot(v3, u3, ndof); + m[0] = btVector3(a11, a12, a13); + m[1] = btVector3(a21, a22, a23); + m[2] = btVector3(a31, a32, a33); + return (m); +} + +static inline btMatrix3x3 OuterProduct(const btVector3& v1, const btVector3& v2) +{ + btMatrix3x3 m; + btScalar a11 = v1[0] * v2[0]; + btScalar a12 = v1[0] * v2[1]; + btScalar a13 = v1[0] * v2[2]; + + btScalar a21 = v1[1] * v2[0]; + btScalar a22 = v1[1] * v2[1]; + btScalar a23 = v1[1] * v2[2]; + + btScalar a31 = v1[2] * v2[0]; + btScalar a32 = v1[2] * v2[1]; + btScalar a33 = v1[2] * v2[2]; + m[0] = btVector3(a11, a12, a13); + m[1] = btVector3(a21, a22, a23); + m[2] = btVector3(a31, a32, a33); + return (m); +} // static inline btMatrix3x3 Add(const btMatrix3x3& a, @@ -1008,6 +1011,20 @@ static inline btMatrix3x3 ImpulseMatrix(btScalar dt, } // +static inline btMatrix3x3 ImpulseMatrix(btScalar dt, + const btMatrix3x3& effective_mass_inv, + btScalar imb, + const btMatrix3x3& iwi, + const btVector3& r) +{ + return (Diagonal(1 / dt) * Add(effective_mass_inv, MassMatrix(imb, iwi, r)).inverse()); + // btMatrix3x3 iimb = MassMatrix(imb, iwi, r); + // if (iimb.determinant() == 0) + // return effective_mass_inv.inverse(); + // return effective_mass_inv.inverse() * Add(effective_mass_inv.inverse(), iimb.inverse()).inverse() * iimb.inverse(); +} + +// static inline btMatrix3x3 ImpulseMatrix(btScalar ima, const btMatrix3x3& iia, const btVector3& ra, btScalar imb, const btMatrix3x3& iib, const btVector3& rb) { @@ -1091,73 +1108,70 @@ static inline void ProjectOrigin(const btVector3& a, // static inline bool rayIntersectsTriangle(const btVector3& origin, const btVector3& dir, const btVector3& v0, const btVector3& v1, const btVector3& v2, btScalar& t) { - btScalar a, f, u, v; - - btVector3 e1 = v1 - v0; - btVector3 e2 = v2 - v0; - btVector3 h = dir.cross(e2); - a = e1.dot(h); - - if (a > -0.00001 && a < 0.00001) - return (false); - - f = btScalar(1) / a; - btVector3 s = origin - v0; - u = f * s.dot(h); - - if (u < 0.0 || u > 1.0) - return (false); - - btVector3 q = s.cross(e1); - v = f * dir.dot(q); - if (v < 0.0 || u + v > 1.0) - return (false); - // at this stage we can compute t to find out where - // the intersection point is on the line - t = f * e2.dot(q); - if (t > 0) // ray intersection - return (true); - else // this means that there is a line intersection - // but not a ray intersection - return (false); + btScalar a, f, u, v; + + btVector3 e1 = v1 - v0; + btVector3 e2 = v2 - v0; + btVector3 h = dir.cross(e2); + a = e1.dot(h); + + if (a > -0.00001 && a < 0.00001) + return (false); + + f = btScalar(1) / a; + btVector3 s = origin - v0; + u = f * s.dot(h); + + if (u < 0.0 || u > 1.0) + return (false); + + btVector3 q = s.cross(e1); + v = f * dir.dot(q); + if (v < 0.0 || u + v > 1.0) + return (false); + // at this stage we can compute t to find out where + // the intersection point is on the line + t = f * e2.dot(q); + if (t > 0) // ray intersection + return (true); + else // this means that there is a line intersection + // but not a ray intersection + return (false); } static inline bool lineIntersectsTriangle(const btVector3& rayStart, const btVector3& rayEnd, const btVector3& p1, const btVector3& p2, const btVector3& p3, btVector3& sect, btVector3& normal) { - btVector3 dir = rayEnd - rayStart; - btScalar dir_norm = dir.norm(); - if (dir_norm < SIMD_EPSILON) - return false; - dir.normalize(); - - btScalar t; - - bool ret = rayIntersectsTriangle(rayStart, dir, p1, p2, p3, t); - - if (ret) - { - if (t <= dir_norm) - { - sect = rayStart + dir * t; - } - else - { - ret = false; - } - } - - if (ret) - { - btVector3 n = (p3-p1).cross(p2-p1); - n.safeNormalize(); - if (n.dot(dir) < 0) - normal = n; - else - normal = -n; - } - return ret; -} + btVector3 dir = rayEnd - rayStart; + btScalar dir_norm = dir.norm(); + if (dir_norm < SIMD_EPSILON) + return false; + dir.normalize(); + btScalar t; + bool ret = rayIntersectsTriangle(rayStart, dir, p1, p2, p3, t); + + if (ret) + { + if (t <= dir_norm) + { + sect = rayStart + dir * t; + } + else + { + ret = false; + } + } + if (ret) + { + btVector3 n = (p3 - p1).cross(p2 - p1); + n.safeNormalize(); + if (n.dot(dir) < 0) + normal = n; + else + normal = -n; + } + return ret; +} // template <typename T> @@ -1586,57 +1600,57 @@ struct btSoftColliders psa->m_cdbvt.collideTT(psa->m_cdbvt.m_root, psb->m_cdbvt.m_root, *this); } }; - // - // CollideSDF_RS - // - struct CollideSDF_RS : btDbvt::ICollide - { - void Process(const btDbvtNode* leaf) - { - btSoftBody::Node* node = (btSoftBody::Node*)leaf->data; - DoNode(*node); - } - void DoNode(btSoftBody::Node& n) const - { - const btScalar m = n.m_im > 0 ? dynmargin : stamargin; - btSoftBody::RContact c; - - if ((!n.m_battach) && - psb->checkContact(m_colObj1Wrap, n.m_x, m, c.m_cti)) - { - const btScalar ima = n.m_im; - const btScalar imb = m_rigidBody ? m_rigidBody->getInvMass() : 0.f; - const btScalar ms = ima + imb; - if (ms > 0) - { - const btTransform& wtr = m_rigidBody ? m_rigidBody->getWorldTransform() : m_colObj1Wrap->getCollisionObject()->getWorldTransform(); - static const btMatrix3x3 iwiStatic(0, 0, 0, 0, 0, 0, 0, 0, 0); - const btMatrix3x3& iwi = m_rigidBody ? m_rigidBody->getInvInertiaTensorWorld() : iwiStatic; - const btVector3 ra = n.m_x - wtr.getOrigin(); - const btVector3 va = m_rigidBody ? m_rigidBody->getVelocityInLocalPoint(ra) * psb->m_sst.sdt : btVector3(0, 0, 0); - const btVector3 vb = n.m_x - n.m_q; - const btVector3 vr = vb - va; - const btScalar dn = btDot(vr, c.m_cti.m_normal); - const btVector3 fv = vr - c.m_cti.m_normal * dn; - const btScalar fc = psb->m_cfg.kDF * m_colObj1Wrap->getCollisionObject()->getFriction(); - c.m_node = &n; - c.m_c0 = ImpulseMatrix(psb->m_sst.sdt, ima, imb, iwi, ra); - c.m_c1 = ra; - c.m_c2 = ima * psb->m_sst.sdt; - c.m_c3 = fv.length2() < (dn * fc * dn * fc) ? 0 : 1 - fc; - c.m_c4 = m_colObj1Wrap->getCollisionObject()->isStaticOrKinematicObject() ? psb->m_cfg.kKHR : psb->m_cfg.kCHR; - psb->m_rcontacts.push_back(c); - if (m_rigidBody) - m_rigidBody->activate(); - } - } - } - btSoftBody* psb; - const btCollisionObjectWrapper* m_colObj1Wrap; - btRigidBody* m_rigidBody; - btScalar dynmargin; - btScalar stamargin; - }; + // + // CollideSDF_RS + // + struct CollideSDF_RS : btDbvt::ICollide + { + void Process(const btDbvtNode* leaf) + { + btSoftBody::Node* node = (btSoftBody::Node*)leaf->data; + DoNode(*node); + } + void DoNode(btSoftBody::Node& n) const + { + const btScalar m = n.m_im > 0 ? dynmargin : stamargin; + btSoftBody::RContact c; + + if ((!n.m_battach) && + psb->checkContact(m_colObj1Wrap, n.m_x, m, c.m_cti)) + { + const btScalar ima = n.m_im; + const btScalar imb = m_rigidBody ? m_rigidBody->getInvMass() : 0.f; + const btScalar ms = ima + imb; + if (ms > 0) + { + const btTransform& wtr = m_rigidBody ? m_rigidBody->getWorldTransform() : m_colObj1Wrap->getCollisionObject()->getWorldTransform(); + static const btMatrix3x3 iwiStatic(0, 0, 0, 0, 0, 0, 0, 0, 0); + const btMatrix3x3& iwi = m_rigidBody ? m_rigidBody->getInvInertiaTensorWorld() : iwiStatic; + const btVector3 ra = n.m_x - wtr.getOrigin(); + const btVector3 va = m_rigidBody ? m_rigidBody->getVelocityInLocalPoint(ra) * psb->m_sst.sdt : btVector3(0, 0, 0); + const btVector3 vb = n.m_x - n.m_q; + const btVector3 vr = vb - va; + const btScalar dn = btDot(vr, c.m_cti.m_normal); + const btVector3 fv = vr - c.m_cti.m_normal * dn; + const btScalar fc = psb->m_cfg.kDF * m_colObj1Wrap->getCollisionObject()->getFriction(); + c.m_node = &n; + c.m_c0 = ImpulseMatrix(psb->m_sst.sdt, ima, imb, iwi, ra); + c.m_c1 = ra; + c.m_c2 = ima * psb->m_sst.sdt; + c.m_c3 = fv.length2() < (dn * fc * dn * fc) ? 0 : 1 - fc; + c.m_c4 = m_colObj1Wrap->getCollisionObject()->isStaticOrKinematicObject() ? psb->m_cfg.kKHR : psb->m_cfg.kCHR; + psb->m_rcontacts.push_back(c); + if (m_rigidBody) + m_rigidBody->activate(); + } + } + } + btSoftBody* psb; + const btCollisionObjectWrapper* m_colObj1Wrap; + btRigidBody* m_rigidBody; + btScalar dynmargin; + btScalar stamargin; + }; // // CollideSDF_RD @@ -1654,72 +1668,74 @@ struct btSoftColliders btSoftBody::DeformableNodeRigidContact c; if (!n.m_battach) - { + { // check for collision at x_{n+1}^* if (psb->checkDeformableContact(m_colObj1Wrap, n.m_q, m, c.m_cti, /*predict = */ true)) - { - const btScalar ima = n.m_im; - // todo: collision between multibody and fixed deformable node will be missed. - const btScalar imb = m_rigidBody ? m_rigidBody->getInvMass() : 0.f; - const btScalar ms = ima + imb; - if (ms > 0) - { - // resolve contact at x_n - psb->checkDeformableContact(m_colObj1Wrap, n.m_x, m, c.m_cti, /*predict = */ false); - btSoftBody::sCti& cti = c.m_cti; - c.m_node = &n; - const btScalar fc = psb->m_cfg.kDF * m_colObj1Wrap->getCollisionObject()->getFriction(); - c.m_c2 = ima; - c.m_c3 = fc; - c.m_c4 = m_colObj1Wrap->getCollisionObject()->isStaticOrKinematicObject() ? psb->m_cfg.kKHR : psb->m_cfg.kCHR; - - if (cti.m_colObj->getInternalType() == btCollisionObject::CO_RIGID_BODY) - { - const btTransform& wtr = m_rigidBody ? m_rigidBody->getWorldTransform() : m_colObj1Wrap->getCollisionObject()->getWorldTransform(); - static const btMatrix3x3 iwiStatic(0, 0, 0, 0, 0, 0, 0, 0, 0); - const btMatrix3x3& iwi = m_rigidBody ? m_rigidBody->getInvInertiaTensorWorld() : iwiStatic; - const btVector3 ra = n.m_x - wtr.getOrigin(); - - c.m_c0 = ImpulseMatrix(1, ima, imb, iwi, ra); - c.m_c1 = ra; - } - else if (cti.m_colObj->getInternalType() == btCollisionObject::CO_FEATHERSTONE_LINK) - { - btMultiBodyLinkCollider* multibodyLinkCol = (btMultiBodyLinkCollider*)btMultiBodyLinkCollider::upcast(cti.m_colObj); - if (multibodyLinkCol) - { - btVector3 normal = cti.m_normal; - btVector3 t1 = generateUnitOrthogonalVector(normal); - btVector3 t2 = btCross(normal, t1); - btMultiBodyJacobianData jacobianData_normal, jacobianData_t1, jacobianData_t2; - findJacobian(multibodyLinkCol, jacobianData_normal, c.m_node->m_x, normal); - findJacobian(multibodyLinkCol, jacobianData_t1, c.m_node->m_x, t1); - findJacobian(multibodyLinkCol, jacobianData_t2, c.m_node->m_x, t2); - - btScalar* J_n = &jacobianData_normal.m_jacobians[0]; - btScalar* J_t1 = &jacobianData_t1.m_jacobians[0]; - btScalar* J_t2 = &jacobianData_t2.m_jacobians[0]; - - btScalar* u_n = &jacobianData_normal.m_deltaVelocitiesUnitImpulse[0]; - btScalar* u_t1 = &jacobianData_t1.m_deltaVelocitiesUnitImpulse[0]; - btScalar* u_t2 = &jacobianData_t2.m_deltaVelocitiesUnitImpulse[0]; - - btMatrix3x3 rot(normal.getX(), normal.getY(), normal.getZ(), - t1.getX(), t1.getY(), t1.getZ(), - t2.getX(), t2.getY(), t2.getZ()); // world frame to local frame - const int ndof = multibodyLinkCol->m_multiBody->getNumDofs() + 6; - btMatrix3x3 local_impulse_matrix = (Diagonal(n.m_im) + OuterProduct(J_n, J_t1, J_t2, u_n, u_t1, u_t2, ndof)).inverse(); - c.m_c0 = rot.transpose() * local_impulse_matrix * rot; - c.jacobianData_normal = jacobianData_normal; - c.jacobianData_t1 = jacobianData_t1; - c.jacobianData_t2 = jacobianData_t2; - c.t1 = t1; - c.t2 = t2; - } - } - psb->m_nodeRigidContacts.push_back(c); - } - } + { + const btScalar ima = n.m_im; + // todo: collision between multibody and fixed deformable node will be missed. + const btScalar imb = m_rigidBody ? m_rigidBody->getInvMass() : 0.f; + const btScalar ms = ima + imb; + if (ms > 0) + { + // resolve contact at x_n + psb->checkDeformableContact(m_colObj1Wrap, n.m_x, m, c.m_cti, /*predict = */ false); + btSoftBody::sCti& cti = c.m_cti; + c.m_node = &n; + const btScalar fc = psb->m_cfg.kDF * m_colObj1Wrap->getCollisionObject()->getFriction(); + c.m_c2 = ima; + c.m_c3 = fc; + c.m_c4 = m_colObj1Wrap->getCollisionObject()->isStaticOrKinematicObject() ? psb->m_cfg.kKHR : psb->m_cfg.kCHR; + c.m_c5 = n.m_effectiveMass_inv; + + if (cti.m_colObj->getInternalType() == btCollisionObject::CO_RIGID_BODY) + { + const btTransform& wtr = m_rigidBody ? m_rigidBody->getWorldTransform() : m_colObj1Wrap->getCollisionObject()->getWorldTransform(); + static const btMatrix3x3 iwiStatic(0, 0, 0, 0, 0, 0, 0, 0, 0); + const btMatrix3x3& iwi = m_rigidBody ? m_rigidBody->getInvInertiaTensorWorld() : iwiStatic; + const btVector3 ra = n.m_x - wtr.getOrigin(); + + c.m_c0 = ImpulseMatrix(1, n.m_effectiveMass_inv, imb, iwi, ra); + // c.m_c0 = ImpulseMatrix(1, ima, imb, iwi, ra); + c.m_c1 = ra; + } + else if (cti.m_colObj->getInternalType() == btCollisionObject::CO_FEATHERSTONE_LINK) + { + btMultiBodyLinkCollider* multibodyLinkCol = (btMultiBodyLinkCollider*)btMultiBodyLinkCollider::upcast(cti.m_colObj); + if (multibodyLinkCol) + { + btVector3 normal = cti.m_normal; + btVector3 t1 = generateUnitOrthogonalVector(normal); + btVector3 t2 = btCross(normal, t1); + btMultiBodyJacobianData jacobianData_normal, jacobianData_t1, jacobianData_t2; + findJacobian(multibodyLinkCol, jacobianData_normal, c.m_node->m_x, normal); + findJacobian(multibodyLinkCol, jacobianData_t1, c.m_node->m_x, t1); + findJacobian(multibodyLinkCol, jacobianData_t2, c.m_node->m_x, t2); + + btScalar* J_n = &jacobianData_normal.m_jacobians[0]; + btScalar* J_t1 = &jacobianData_t1.m_jacobians[0]; + btScalar* J_t2 = &jacobianData_t2.m_jacobians[0]; + + btScalar* u_n = &jacobianData_normal.m_deltaVelocitiesUnitImpulse[0]; + btScalar* u_t1 = &jacobianData_t1.m_deltaVelocitiesUnitImpulse[0]; + btScalar* u_t2 = &jacobianData_t2.m_deltaVelocitiesUnitImpulse[0]; + + btMatrix3x3 rot(normal.getX(), normal.getY(), normal.getZ(), + t1.getX(), t1.getY(), t1.getZ(), + t2.getX(), t2.getY(), t2.getZ()); // world frame to local frame + const int ndof = multibodyLinkCol->m_multiBody->getNumDofs() + 6; + btMatrix3x3 local_impulse_matrix = (n.m_effectiveMass_inv + OuterProduct(J_n, J_t1, J_t2, u_n, u_t1, u_t2, ndof)).inverse(); + c.m_c0 = rot.transpose() * local_impulse_matrix * rot; + c.jacobianData_normal = jacobianData_normal; + c.jacobianData_t1 = jacobianData_t1; + c.jacobianData_t2 = jacobianData_t2; + c.t1 = t1; + c.t2 = t2; + } + } + psb->m_nodeRigidContacts.push_back(c); + } + } } } btSoftBody* psb; @@ -1728,112 +1744,111 @@ struct btSoftColliders btScalar dynmargin; btScalar stamargin; }; - - // - // CollideSDF_RDF - // - struct CollideSDF_RDF : btDbvt::ICollide - { - void Process(const btDbvtNode* leaf) - { - btSoftBody::Face* face = (btSoftBody::Face*)leaf->data; - DoNode(*face); - } - void DoNode(btSoftBody::Face& f) const - { - btSoftBody::Node* n0 = f.m_n[0]; - btSoftBody::Node* n1 = f.m_n[1]; - btSoftBody::Node* n2 = f.m_n[2]; - const btScalar m = (n0->m_im > 0 && n1->m_im > 0 && n2->m_im > 0 )? dynmargin : stamargin; - btSoftBody::DeformableFaceRigidContact c; - btVector3 contact_point; - btVector3 bary; - if (psb->checkDeformableFaceContact(m_colObj1Wrap, f, contact_point, bary, m, c.m_cti, true)) - { - f.m_pcontact[3] = 1; - btScalar ima = n0->m_im + n1->m_im + n2->m_im; - const btScalar imb = m_rigidBody ? m_rigidBody->getInvMass() : 0.f; - // todo: collision between multibody and fixed deformable face will be missed. - const btScalar ms = ima + imb; - if (ms > 0) - { - // resolve contact at x_n -// psb->checkDeformableFaceContact(m_colObj1Wrap, f, contact_point, bary, m, c.m_cti, /*predict = */ false); - btSoftBody::sCti& cti = c.m_cti; - c.m_contactPoint = contact_point; - c.m_bary = bary; - // todo xuchenhan@: this is assuming mass of all vertices are the same. Need to modify if mass are different for distinct vertices - c.m_weights = btScalar(2)/(btScalar(1) + bary.length2()) * bary; - c.m_face = &f; + + // + // CollideSDF_RDF + // + struct CollideSDF_RDF : btDbvt::ICollide + { + void Process(const btDbvtNode* leaf) + { + btSoftBody::Face* face = (btSoftBody::Face*)leaf->data; + DoNode(*face); + } + void DoNode(btSoftBody::Face& f) const + { + btSoftBody::Node* n0 = f.m_n[0]; + btSoftBody::Node* n1 = f.m_n[1]; + btSoftBody::Node* n2 = f.m_n[2]; + const btScalar m = (n0->m_im > 0 && n1->m_im > 0 && n2->m_im > 0) ? dynmargin : stamargin; + btSoftBody::DeformableFaceRigidContact c; + btVector3 contact_point; + btVector3 bary; + if (psb->checkDeformableFaceContact(m_colObj1Wrap, f, contact_point, bary, m, c.m_cti, true)) + { + btScalar ima = n0->m_im + n1->m_im + n2->m_im; + const btScalar imb = m_rigidBody ? m_rigidBody->getInvMass() : 0.f; + // todo: collision between multibody and fixed deformable face will be missed. + const btScalar ms = ima + imb; + if (ms > 0) + { + // resolve contact at x_n + // psb->checkDeformableFaceContact(m_colObj1Wrap, f, contact_point, bary, m, c.m_cti, /*predict = */ false); + btSoftBody::sCti& cti = c.m_cti; + c.m_contactPoint = contact_point; + c.m_bary = bary; + // todo xuchenhan@: this is assuming mass of all vertices are the same. Need to modify if mass are different for distinct vertices + c.m_weights = btScalar(2) / (btScalar(1) + bary.length2()) * bary; + c.m_face = &f; // friction is handled by the nodes to prevent sticking -// const btScalar fc = 0; - const btScalar fc = psb->m_cfg.kDF * m_colObj1Wrap->getCollisionObject()->getFriction(); - - // the effective inverse mass of the face as in https://graphics.stanford.edu/papers/cloth-sig02/cloth.pdf - ima = bary.getX()*c.m_weights.getX() * n0->m_im + bary.getY()*c.m_weights.getY() * n1->m_im + bary.getZ()*c.m_weights.getZ() * n2->m_im; - c.m_c2 = ima; - c.m_c3 = fc; - c.m_c4 = m_colObj1Wrap->getCollisionObject()->isStaticOrKinematicObject() ? psb->m_cfg.kKHR : psb->m_cfg.kCHR; - if (cti.m_colObj->getInternalType() == btCollisionObject::CO_RIGID_BODY) - { - const btTransform& wtr = m_rigidBody ? m_rigidBody->getWorldTransform() : m_colObj1Wrap->getCollisionObject()->getWorldTransform(); - static const btMatrix3x3 iwiStatic(0, 0, 0, 0, 0, 0, 0, 0, 0); - const btMatrix3x3& iwi = m_rigidBody ? m_rigidBody->getInvInertiaTensorWorld() : iwiStatic; - const btVector3 ra = contact_point - wtr.getOrigin(); - - // we do not scale the impulse matrix by dt - c.m_c0 = ImpulseMatrix(1, ima, imb, iwi, ra); - c.m_c1 = ra; - } - else if (cti.m_colObj->getInternalType() == btCollisionObject::CO_FEATHERSTONE_LINK) - { - btMultiBodyLinkCollider* multibodyLinkCol = (btMultiBodyLinkCollider*)btMultiBodyLinkCollider::upcast(cti.m_colObj); - if (multibodyLinkCol) - { - btVector3 normal = cti.m_normal; - btVector3 t1 = generateUnitOrthogonalVector(normal); - btVector3 t2 = btCross(normal, t1); - btMultiBodyJacobianData jacobianData_normal, jacobianData_t1, jacobianData_t2; - findJacobian(multibodyLinkCol, jacobianData_normal, contact_point, normal); - findJacobian(multibodyLinkCol, jacobianData_t1, contact_point, t1); - findJacobian(multibodyLinkCol, jacobianData_t2, contact_point, t2); - - btScalar* J_n = &jacobianData_normal.m_jacobians[0]; - btScalar* J_t1 = &jacobianData_t1.m_jacobians[0]; - btScalar* J_t2 = &jacobianData_t2.m_jacobians[0]; - - btScalar* u_n = &jacobianData_normal.m_deltaVelocitiesUnitImpulse[0]; - btScalar* u_t1 = &jacobianData_t1.m_deltaVelocitiesUnitImpulse[0]; - btScalar* u_t2 = &jacobianData_t2.m_deltaVelocitiesUnitImpulse[0]; - - btMatrix3x3 rot(normal.getX(), normal.getY(), normal.getZ(), - t1.getX(), t1.getY(), t1.getZ(), - t2.getX(), t2.getY(), t2.getZ()); // world frame to local frame - const int ndof = multibodyLinkCol->m_multiBody->getNumDofs() + 6; - btMatrix3x3 local_impulse_matrix = (Diagonal(ima) + OuterProduct(J_n, J_t1, J_t2, u_n, u_t1, u_t2, ndof)).inverse(); - c.m_c0 = rot.transpose() * local_impulse_matrix * rot; - c.jacobianData_normal = jacobianData_normal; - c.jacobianData_t1 = jacobianData_t1; - c.jacobianData_t2 = jacobianData_t2; - c.t1 = t1; - c.t2 = t2; - } - } - psb->m_faceRigidContacts.push_back(c); - } - } - else - { - f.m_pcontact[3] = 0; - } - } - btSoftBody* psb; - const btCollisionObjectWrapper* m_colObj1Wrap; - btRigidBody* m_rigidBody; - btScalar dynmargin; - btScalar stamargin; - }; - + // const btScalar fc = 0; + const btScalar fc = psb->m_cfg.kDF * m_colObj1Wrap->getCollisionObject()->getFriction(); + + // the effective inverse mass of the face as in https://graphics.stanford.edu/papers/cloth-sig02/cloth.pdf + ima = bary.getX() * c.m_weights.getX() * n0->m_im + bary.getY() * c.m_weights.getY() * n1->m_im + bary.getZ() * c.m_weights.getZ() * n2->m_im; + c.m_c2 = ima; + c.m_c3 = fc; + c.m_c4 = m_colObj1Wrap->getCollisionObject()->isStaticOrKinematicObject() ? psb->m_cfg.kKHR : psb->m_cfg.kCHR; + c.m_c5 = Diagonal(ima); + if (cti.m_colObj->getInternalType() == btCollisionObject::CO_RIGID_BODY) + { + const btTransform& wtr = m_rigidBody ? m_rigidBody->getWorldTransform() : m_colObj1Wrap->getCollisionObject()->getWorldTransform(); + static const btMatrix3x3 iwiStatic(0, 0, 0, 0, 0, 0, 0, 0, 0); + const btMatrix3x3& iwi = m_rigidBody ? m_rigidBody->getInvInertiaTensorWorld() : iwiStatic; + const btVector3 ra = contact_point - wtr.getOrigin(); + + // we do not scale the impulse matrix by dt + c.m_c0 = ImpulseMatrix(1, ima, imb, iwi, ra); + c.m_c1 = ra; + } + else if (cti.m_colObj->getInternalType() == btCollisionObject::CO_FEATHERSTONE_LINK) + { + btMultiBodyLinkCollider* multibodyLinkCol = (btMultiBodyLinkCollider*)btMultiBodyLinkCollider::upcast(cti.m_colObj); + if (multibodyLinkCol) + { + btVector3 normal = cti.m_normal; + btVector3 t1 = generateUnitOrthogonalVector(normal); + btVector3 t2 = btCross(normal, t1); + btMultiBodyJacobianData jacobianData_normal, jacobianData_t1, jacobianData_t2; + findJacobian(multibodyLinkCol, jacobianData_normal, contact_point, normal); + findJacobian(multibodyLinkCol, jacobianData_t1, contact_point, t1); + findJacobian(multibodyLinkCol, jacobianData_t2, contact_point, t2); + + btScalar* J_n = &jacobianData_normal.m_jacobians[0]; + btScalar* J_t1 = &jacobianData_t1.m_jacobians[0]; + btScalar* J_t2 = &jacobianData_t2.m_jacobians[0]; + + btScalar* u_n = &jacobianData_normal.m_deltaVelocitiesUnitImpulse[0]; + btScalar* u_t1 = &jacobianData_t1.m_deltaVelocitiesUnitImpulse[0]; + btScalar* u_t2 = &jacobianData_t2.m_deltaVelocitiesUnitImpulse[0]; + + btMatrix3x3 rot(normal.getX(), normal.getY(), normal.getZ(), + t1.getX(), t1.getY(), t1.getZ(), + t2.getX(), t2.getY(), t2.getZ()); // world frame to local frame + const int ndof = multibodyLinkCol->m_multiBody->getNumDofs() + 6; + btMatrix3x3 local_impulse_matrix = (Diagonal(ima) + OuterProduct(J_n, J_t1, J_t2, u_n, u_t1, u_t2, ndof)).inverse(); + c.m_c0 = rot.transpose() * local_impulse_matrix * rot; + c.jacobianData_normal = jacobianData_normal; + c.jacobianData_t1 = jacobianData_t1; + c.jacobianData_t2 = jacobianData_t2; + c.t1 = t1; + c.t2 = t2; + } + } + psb->m_faceRigidContacts.push_back(c); + } + } + // Set caching barycenters to be false after collision detection. + // Only turn on when contact is static. + f.m_pcontact[3] = 0; + } + btSoftBody* psb; + const btCollisionObjectWrapper* m_colObj1Wrap; + btRigidBody* m_rigidBody; + btScalar dynmargin; + btScalar stamargin; + }; + // // CollideVF_SS // @@ -1844,12 +1859,12 @@ struct btSoftColliders { btSoftBody::Node* node = (btSoftBody::Node*)lnode->data; btSoftBody::Face* face = (btSoftBody::Face*)lface->data; - for (int i = 0; i < 3; ++i) - { - if (face->m_n[i] == node) - continue; - } - + for (int i = 0; i < 3; ++i) + { + if (face->m_n[i] == node) + continue; + } + btVector3 o = node->m_x; btVector3 p; btScalar d = SIMD_INFINITY; @@ -1879,7 +1894,7 @@ struct btSoftColliders c.m_node = node; c.m_face = face; c.m_weights = w; - c.m_friction = btMax (psb[0]->m_cfg.kDF, psb[1]->m_cfg.kDF); + c.m_friction = btMax(psb[0]->m_cfg.kDF, psb[1]->m_cfg.kDF); c.m_cfm[0] = ma / ms * psb[0]->m_cfg.kSHR; c.m_cfm[1] = mb / ms * psb[1]->m_cfg.kSHR; psb[0]->m_scontacts.push_back(c); @@ -1889,206 +1904,205 @@ struct btSoftColliders btSoftBody* psb[2]; btScalar mrg; }; - - - // - // CollideVF_DD - // - struct CollideVF_DD : btDbvt::ICollide - { - void Process(const btDbvtNode* lnode, - const btDbvtNode* lface) - { - btSoftBody::Node* node = (btSoftBody::Node*)lnode->data; - btSoftBody::Face* face = (btSoftBody::Face*)lface->data; - btVector3 bary; - if (proximityTest(face->m_n[0]->m_x, face->m_n[1]->m_x, face->m_n[2]->m_x, node->m_x, face->m_normal, mrg, bary)) - { - const btSoftBody::Node* n[] = {face->m_n[0], face->m_n[1], face->m_n[2]}; - const btVector3 w = bary; - const btScalar ma = node->m_im; - btScalar mb = BaryEval(n[0]->m_im, n[1]->m_im, n[2]->m_im, w); - if ((n[0]->m_im <= 0) || - (n[1]->m_im <= 0) || - (n[2]->m_im <= 0)) - { - mb = 0; - } - const btScalar ms = ma + mb; - if (ms > 0) - { - btSoftBody::DeformableFaceNodeContact c; - c.m_normal = face->m_normal; - if (!useFaceNormal && c.m_normal.dot(node->m_x - face->m_n[2]->m_x) < 0) - c.m_normal = -face->m_normal; - c.m_margin = mrg; - c.m_node = node; - c.m_face = face; - c.m_bary = w; - c.m_friction = psb[0]->m_cfg.kDF * psb[1]->m_cfg.kDF; - psb[0]->m_faceNodeContacts.push_back(c); - } - } - } - btSoftBody* psb[2]; - btScalar mrg; - bool useFaceNormal; - }; - - // - // CollideFF_DD - // - struct CollideFF_DD : btDbvt::ICollide - { - void Process(const btDbvntNode* lface1, - const btDbvntNode* lface2) - { - btSoftBody::Face* f1 = (btSoftBody::Face*)lface1->data; - btSoftBody::Face* f2 = (btSoftBody::Face*)lface2->data; - if (f1 != f2) - { - Repel(f1, f2); - Repel(f2, f1); - } - } - void Repel(btSoftBody::Face* f1, btSoftBody::Face* f2) - { - //#define REPEL_NEIGHBOR 1 + + // + // CollideVF_DD + // + struct CollideVF_DD : btDbvt::ICollide + { + void Process(const btDbvtNode* lnode, + const btDbvtNode* lface) + { + btSoftBody::Node* node = (btSoftBody::Node*)lnode->data; + btSoftBody::Face* face = (btSoftBody::Face*)lface->data; + btVector3 bary; + if (proximityTest(face->m_n[0]->m_x, face->m_n[1]->m_x, face->m_n[2]->m_x, node->m_x, face->m_normal, mrg, bary)) + { + const btSoftBody::Node* n[] = {face->m_n[0], face->m_n[1], face->m_n[2]}; + const btVector3 w = bary; + const btScalar ma = node->m_im; + btScalar mb = BaryEval(n[0]->m_im, n[1]->m_im, n[2]->m_im, w); + if ((n[0]->m_im <= 0) || + (n[1]->m_im <= 0) || + (n[2]->m_im <= 0)) + { + mb = 0; + } + const btScalar ms = ma + mb; + if (ms > 0) + { + btSoftBody::DeformableFaceNodeContact c; + c.m_normal = face->m_normal; + if (!useFaceNormal && c.m_normal.dot(node->m_x - face->m_n[2]->m_x) < 0) + c.m_normal = -face->m_normal; + c.m_margin = mrg; + c.m_node = node; + c.m_face = face; + c.m_bary = w; + c.m_friction = psb[0]->m_cfg.kDF * psb[1]->m_cfg.kDF; + psb[0]->m_faceNodeContacts.push_back(c); + } + } + } + btSoftBody* psb[2]; + btScalar mrg; + bool useFaceNormal; + }; + + // + // CollideFF_DD + // + struct CollideFF_DD : btDbvt::ICollide + { + void Process(const btDbvntNode* lface1, + const btDbvntNode* lface2) + { + btSoftBody::Face* f1 = (btSoftBody::Face*)lface1->data; + btSoftBody::Face* f2 = (btSoftBody::Face*)lface2->data; + if (f1 != f2) + { + Repel(f1, f2); + Repel(f2, f1); + } + } + void Repel(btSoftBody::Face* f1, btSoftBody::Face* f2) + { + //#define REPEL_NEIGHBOR 1 #ifndef REPEL_NEIGHBOR - for (int node_id = 0; node_id < 3; ++node_id) - { - btSoftBody::Node* node = f1->m_n[node_id]; - for (int i = 0; i < 3; ++i) - { - if (f2->m_n[i] == node) - return; - } - } + for (int node_id = 0; node_id < 3; ++node_id) + { + btSoftBody::Node* node = f1->m_n[node_id]; + for (int i = 0; i < 3; ++i) + { + if (f2->m_n[i] == node) + return; + } + } #endif - bool skip = false; - for (int node_id = 0; node_id < 3; ++node_id) - { - btSoftBody::Node* node = f1->m_n[node_id]; + bool skip = false; + for (int node_id = 0; node_id < 3; ++node_id) + { + btSoftBody::Node* node = f1->m_n[node_id]; #ifdef REPEL_NEIGHBOR - for (int i = 0; i < 3; ++i) - { - if (f2->m_n[i] == node) - { - skip = true; - break; - } - } - if (skip) - { - skip = false; - continue; - } + for (int i = 0; i < 3; ++i) + { + if (f2->m_n[i] == node) + { + skip = true; + break; + } + } + if (skip) + { + skip = false; + continue; + } #endif - btSoftBody::Face* face = f2; - btVector3 bary; - if (!proximityTest(face->m_n[0]->m_x, face->m_n[1]->m_x, face->m_n[2]->m_x, node->m_x, face->m_normal, mrg, bary)) - continue; - btSoftBody::DeformableFaceNodeContact c; - c.m_normal = face->m_normal; - if (!useFaceNormal && c.m_normal.dot(node->m_x - face->m_n[2]->m_x) < 0) - c.m_normal = -face->m_normal; - c.m_margin = mrg; - c.m_node = node; - c.m_face = face; - c.m_bary = bary; - c.m_friction = psb[0]->m_cfg.kDF * psb[1]->m_cfg.kDF; - psb[0]->m_faceNodeContacts.push_back(c); - } - } - btSoftBody* psb[2]; - btScalar mrg; - bool useFaceNormal; - }; - - struct CollideCCD : btDbvt::ICollide - { - void Process(const btDbvtNode* lnode, - const btDbvtNode* lface) - { - btSoftBody::Node* node = (btSoftBody::Node*)lnode->data; - btSoftBody::Face* face = (btSoftBody::Face*)lface->data; - btVector3 bary; - if (bernsteinCCD(face, node, dt, SAFE_EPSILON, bary)) - { - btSoftBody::DeformableFaceNodeContact c; - c.m_normal = face->m_normal; - if (!useFaceNormal && c.m_normal.dot(node->m_x - face->m_n[2]->m_x) < 0) - c.m_normal = -face->m_normal; - c.m_node = node; - c.m_face = face; - c.m_bary = bary; - c.m_friction = psb[0]->m_cfg.kDF * psb[1]->m_cfg.kDF; - psb[0]->m_faceNodeContacts.push_back(c); - } - } - void Process(const btDbvntNode* lface1, - const btDbvntNode* lface2) - { - btSoftBody::Face* f1 = (btSoftBody::Face*)lface1->data; - btSoftBody::Face* f2 = (btSoftBody::Face*)lface2->data; - if (f1 != f2) - { - Repel(f1, f2); - Repel(f2, f1); - } - } - void Repel(btSoftBody::Face* f1, btSoftBody::Face* f2) - { - //#define REPEL_NEIGHBOR 1 + btSoftBody::Face* face = f2; + btVector3 bary; + if (!proximityTest(face->m_n[0]->m_x, face->m_n[1]->m_x, face->m_n[2]->m_x, node->m_x, face->m_normal, mrg, bary)) + continue; + btSoftBody::DeformableFaceNodeContact c; + c.m_normal = face->m_normal; + if (!useFaceNormal && c.m_normal.dot(node->m_x - face->m_n[2]->m_x) < 0) + c.m_normal = -face->m_normal; + c.m_margin = mrg; + c.m_node = node; + c.m_face = face; + c.m_bary = bary; + c.m_friction = psb[0]->m_cfg.kDF * psb[1]->m_cfg.kDF; + psb[0]->m_faceNodeContacts.push_back(c); + } + } + btSoftBody* psb[2]; + btScalar mrg; + bool useFaceNormal; + }; + + struct CollideCCD : btDbvt::ICollide + { + void Process(const btDbvtNode* lnode, + const btDbvtNode* lface) + { + btSoftBody::Node* node = (btSoftBody::Node*)lnode->data; + btSoftBody::Face* face = (btSoftBody::Face*)lface->data; + btVector3 bary; + if (bernsteinCCD(face, node, dt, SAFE_EPSILON, bary)) + { + btSoftBody::DeformableFaceNodeContact c; + c.m_normal = face->m_normal; + if (!useFaceNormal && c.m_normal.dot(node->m_x - face->m_n[2]->m_x) < 0) + c.m_normal = -face->m_normal; + c.m_node = node; + c.m_face = face; + c.m_bary = bary; + c.m_friction = psb[0]->m_cfg.kDF * psb[1]->m_cfg.kDF; + psb[0]->m_faceNodeContacts.push_back(c); + } + } + void Process(const btDbvntNode* lface1, + const btDbvntNode* lface2) + { + btSoftBody::Face* f1 = (btSoftBody::Face*)lface1->data; + btSoftBody::Face* f2 = (btSoftBody::Face*)lface2->data; + if (f1 != f2) + { + Repel(f1, f2); + Repel(f2, f1); + } + } + void Repel(btSoftBody::Face* f1, btSoftBody::Face* f2) + { + //#define REPEL_NEIGHBOR 1 #ifndef REPEL_NEIGHBOR - for (int node_id = 0; node_id < 3; ++node_id) - { - btSoftBody::Node* node = f1->m_n[node_id]; - for (int i = 0; i < 3; ++i) - { - if (f2->m_n[i] == node) - return; - } - } + for (int node_id = 0; node_id < 3; ++node_id) + { + btSoftBody::Node* node = f1->m_n[node_id]; + for (int i = 0; i < 3; ++i) + { + if (f2->m_n[i] == node) + return; + } + } #endif - bool skip = false; - for (int node_id = 0; node_id < 3; ++node_id) - { - btSoftBody::Node* node = f1->m_n[node_id]; + bool skip = false; + for (int node_id = 0; node_id < 3; ++node_id) + { + btSoftBody::Node* node = f1->m_n[node_id]; #ifdef REPEL_NEIGHBOR - for (int i = 0; i < 3; ++i) - { - if (f2->m_n[i] == node) - { - skip = true; - break; - } - } - if (skip) - { - skip = false; - continue; - } + for (int i = 0; i < 3; ++i) + { + if (f2->m_n[i] == node) + { + skip = true; + break; + } + } + if (skip) + { + skip = false; + continue; + } #endif - btSoftBody::Face* face = f2; - btVector3 bary; + btSoftBody::Face* face = f2; + btVector3 bary; if (bernsteinCCD(face, node, dt, SAFE_EPSILON, bary)) - { - btSoftBody::DeformableFaceNodeContact c; - c.m_normal = face->m_normal; - if (!useFaceNormal && c.m_normal.dot(node->m_x - face->m_n[2]->m_x) < 0) - c.m_normal = -face->m_normal; - c.m_node = node; - c.m_face = face; - c.m_bary = bary; - c.m_friction = psb[0]->m_cfg.kDF * psb[1]->m_cfg.kDF; - psb[0]->m_faceNodeContacts.push_back(c); - } - } - } - btSoftBody* psb[2]; - btScalar dt, mrg; - bool useFaceNormal; - }; + { + btSoftBody::DeformableFaceNodeContact c; + c.m_normal = face->m_normal; + if (!useFaceNormal && c.m_normal.dot(node->m_x - face->m_n[2]->m_x) < 0) + c.m_normal = -face->m_normal; + c.m_node = node; + c.m_face = face; + c.m_bary = bary; + c.m_friction = psb[0]->m_cfg.kDF * psb[1]->m_cfg.kDF; + psb[0]->m_faceNodeContacts.push_back(c); + } + } + } + btSoftBody* psb[2]; + btScalar dt, mrg; + bool useFaceNormal; + }; }; #endif //_BT_SOFT_BODY_INTERNALS_H diff --git a/thirdparty/bullet/BulletSoftBody/btSoftBodySolvers.h b/thirdparty/bullet/BulletSoftBody/btSoftBodySolvers.h index c4ac4141aa..dbb2624eee 100644 --- a/thirdparty/bullet/BulletSoftBody/btSoftBodySolvers.h +++ b/thirdparty/bullet/BulletSoftBody/btSoftBodySolvers.h @@ -36,7 +36,7 @@ public: CL_SIMD_SOLVER, DX_SOLVER, DX_SIMD_SOLVER, - DEFORMABLE_SOLVER + DEFORMABLE_SOLVER }; protected: diff --git a/thirdparty/bullet/BulletSoftBody/btSoftMultiBodyDynamicsWorld.cpp b/thirdparty/bullet/BulletSoftBody/btSoftMultiBodyDynamicsWorld.cpp index 282dbf75f0..329bd19d71 100644 --- a/thirdparty/bullet/BulletSoftBody/btSoftMultiBodyDynamicsWorld.cpp +++ b/thirdparty/bullet/BulletSoftBody/btSoftMultiBodyDynamicsWorld.cpp @@ -100,6 +100,11 @@ void btSoftMultiBodyDynamicsWorld::internalSingleStepSimulation(btScalar timeSte ///update soft bodies m_softBodySolver->updateSoftBodies(); + for (int i = 0; i < m_softBodies.size(); i++) + { + btSoftBody* psb = (btSoftBody*)m_softBodies[i]; + psb->interpolateRenderMesh(); + } // End solver-wise simulation step // /////////////////////////////// } diff --git a/thirdparty/bullet/BulletSoftBody/btSparseSDF.h b/thirdparty/bullet/BulletSoftBody/btSparseSDF.h index eb290a1dbd..d611726bcd 100644 --- a/thirdparty/bullet/BulletSoftBody/btSparseSDF.h +++ b/thirdparty/bullet/BulletSoftBody/btSparseSDF.h @@ -22,36 +22,36 @@ subject to the following restrictions: // Fast Hash -#if !defined (get16bits) -#define get16bits(d) ((((unsigned int)(((const unsigned char *)(d))[1])) << 8)\ -+(unsigned int)(((const unsigned char *)(d))[0]) ) +#if !defined(get16bits) +#define get16bits(d) ((((unsigned int)(((const unsigned char*)(d))[1])) << 8) + (unsigned int)(((const unsigned char*)(d))[0])) #endif // // super hash function by Paul Hsieh // -inline unsigned int HsiehHash (const char * data, int len) { - unsigned int hash = len, tmp; - len>>=2; - - /* Main loop */ - for (;len > 0; len--) { - hash += get16bits (data); - tmp = (get16bits (data+2) << 11) ^ hash; - hash = (hash << 16) ^ tmp; - data += 2*sizeof (unsigned short); - hash += hash >> 11; - } +inline unsigned int HsiehHash(const char* data, int len) +{ + unsigned int hash = len, tmp; + len >>= 2; + /* Main loop */ + for (; len > 0; len--) + { + hash += get16bits(data); + tmp = (get16bits(data + 2) << 11) ^ hash; + hash = (hash << 16) ^ tmp; + data += 2 * sizeof(unsigned short); + hash += hash >> 11; + } - /* Force "avalanching" of final 127 bits */ - hash ^= hash << 3; - hash += hash >> 5; - hash ^= hash << 4; - hash += hash >> 17; - hash ^= hash << 25; - hash += hash >> 6; + /* Force "avalanching" of final 127 bits */ + hash ^= hash << 3; + hash += hash >> 5; + hash ^= hash << 4; + hash += hash >> 17; + hash ^= hash << 25; + hash += hash >> 6; - return hash; + return hash; } template <const int CELLSIZE> @@ -81,7 +81,7 @@ struct btSparseSdf btAlignedObjectArray<Cell*> cells; btScalar voxelsz; - btScalar m_defaultVoxelsz; + btScalar m_defaultVoxelsz; int puid; int ncells; int m_clampCells; @@ -103,16 +103,16 @@ struct btSparseSdf //if this limit is reached, the SDF is reset (at the cost of some performance during the reset) m_clampCells = clampCells; cells.resize(hashsize, 0); - m_defaultVoxelsz = 0.25; + m_defaultVoxelsz = 0.25; Reset(); } // - - void setDefaultVoxelsz(btScalar sz) - { - m_defaultVoxelsz = sz; - } - + + void setDefaultVoxelsz(btScalar sz) + { + m_defaultVoxelsz = sz; + } + void Reset() { for (int i = 0, ni = cells.size(); i < ni; ++i) @@ -162,7 +162,7 @@ struct btSparseSdf nqueries = 1; nprobes = 1; ++puid; ///@todo: Reset puid's when int range limit is reached */ - /* else setup a priority list... */ + /* else setup a priority list... */ } // int RemoveReferences(btCollisionShape* pcs) @@ -221,7 +221,7 @@ struct btSparseSdf else { // printf("c->hash/c[0][1][2]=%d,%d,%d,%d\n", c->hash, c->c[0], c->c[1],c->c[2]); - //printf("h,ixb,iyb,izb=%d,%d,%d,%d\n", h,ix.b, iy.b, iz.b); + //printf("h,ixb,iyb,izb=%d,%d,%d,%d\n", h,ix.b, iy.b, iz.b); c = c->next; } @@ -363,7 +363,7 @@ struct btSparseSdf myset.p = (void*)shape; const char* ptr = (const char*)&myset; - unsigned int result = HsiehHash(ptr, sizeof(btS) ); + unsigned int result = HsiehHash(ptr, sizeof(btS)); return result; } diff --git a/thirdparty/bullet/BulletSoftBody/poly34.cpp b/thirdparty/bullet/BulletSoftBody/poly34.cpp index 819d0c79f7..ec7549c8e8 100644 --- a/thirdparty/bullet/BulletSoftBody/poly34.cpp +++ b/thirdparty/bullet/BulletSoftBody/poly34.cpp @@ -6,7 +6,7 @@ // #include <math.h> -#include "poly34.h" // solution of cubic and quartic equation +#include "poly34.h" // solution of cubic and quartic equation #define TwoPi 6.28318530717958648 const btScalar eps = SIMD_EPSILON; @@ -15,50 +15,53 @@ const btScalar eps = SIMD_EPSILON; //============================================================================= static SIMD_FORCE_INLINE btScalar _root3(btScalar x) { - btScalar s = 1.; - while (x < 1.) { - x *= 8.; - s *= 0.5; - } - while (x > 8.) { - x *= 0.125; - s *= 2.; - } - btScalar r = 1.5; - r -= 1. / 3. * (r - x / (r * r)); - r -= 1. / 3. * (r - x / (r * r)); - r -= 1. / 3. * (r - x / (r * r)); - r -= 1. / 3. * (r - x / (r * r)); - r -= 1. / 3. * (r - x / (r * r)); - r -= 1. / 3. * (r - x / (r * r)); - return r * s; + btScalar s = 1.; + while (x < 1.) + { + x *= 8.; + s *= 0.5; + } + while (x > 8.) + { + x *= 0.125; + s *= 2.; + } + btScalar r = 1.5; + r -= 1. / 3. * (r - x / (r * r)); + r -= 1. / 3. * (r - x / (r * r)); + r -= 1. / 3. * (r - x / (r * r)); + r -= 1. / 3. * (r - x / (r * r)); + r -= 1. / 3. * (r - x / (r * r)); + r -= 1. / 3. * (r - x / (r * r)); + return r * s; } btScalar SIMD_FORCE_INLINE root3(btScalar x) { - if (x > 0) - return _root3(x); - else if (x < 0) - return -_root3(-x); - else - return 0.; + if (x > 0) + return _root3(x); + else if (x < 0) + return -_root3(-x); + else + return 0.; } // x - array of size 2 // return 2: 2 real roots x[0], x[1] // return 0: pair of complex roots: x[0]i*x[1] int SolveP2(btScalar* x, btScalar a, btScalar b) -{ // solve equation x^2 + a*x + b = 0 - btScalar D = 0.25 * a * a - b; - if (D >= 0) { - D = sqrt(D); - x[0] = -0.5 * a + D; - x[1] = -0.5 * a - D; - return 2; - } - x[0] = -0.5 * a; - x[1] = sqrt(-D); - return 0; +{ // solve equation x^2 + a*x + b = 0 + btScalar D = 0.25 * a * a - b; + if (D >= 0) + { + D = sqrt(D); + x[0] = -0.5 * a + D; + x[1] = -0.5 * a - D; + return 2; + } + x[0] = -0.5 * a; + x[1] = sqrt(-D); + return 0; } //--------------------------------------------------------------------------- // x - array of size 3 @@ -66,217 +69,228 @@ int SolveP2(btScalar* x, btScalar a, btScalar b) // 2 real roots: x[0], x[1], return 2 // 1 real root : x[0], x[1] i*x[2], return 1 int SolveP3(btScalar* x, btScalar a, btScalar b, btScalar c) -{ // solve cubic equation x^3 + a*x^2 + b*x + c = 0 - btScalar a2 = a * a; - btScalar q = (a2 - 3 * b) / 9; - if (q < 0) - q = eps; - btScalar r = (a * (2 * a2 - 9 * b) + 27 * c) / 54; - // equation x^3 + q*x + r = 0 - btScalar r2 = r * r; - btScalar q3 = q * q * q; - btScalar A, B; - if (r2 <= (q3 + eps)) { //<<-- FIXED! - btScalar t = r / sqrt(q3); - if (t < -1) - t = -1; - if (t > 1) - t = 1; - t = acos(t); - a /= 3; - q = -2 * sqrt(q); - x[0] = q * cos(t / 3) - a; - x[1] = q * cos((t + TwoPi) / 3) - a; - x[2] = q * cos((t - TwoPi) / 3) - a; - return (3); - } - else { - //A =-pow(fabs(r)+sqrt(r2-q3),1./3); - A = -root3(fabs(r) + sqrt(r2 - q3)); - if (r < 0) - A = -A; - B = (A == 0 ? 0 : q / A); - - a /= 3; - x[0] = (A + B) - a; - x[1] = -0.5 * (A + B) - a; - x[2] = 0.5 * sqrt(3.) * (A - B); - if (fabs(x[2]) < eps) { - x[2] = x[1]; - return (2); - } - return (1); - } -} // SolveP3(btScalar *x,btScalar a,btScalar b,btScalar c) { +{ // solve cubic equation x^3 + a*x^2 + b*x + c = 0 + btScalar a2 = a * a; + btScalar q = (a2 - 3 * b) / 9; + if (q < 0) + q = eps; + btScalar r = (a * (2 * a2 - 9 * b) + 27 * c) / 54; + // equation x^3 + q*x + r = 0 + btScalar r2 = r * r; + btScalar q3 = q * q * q; + btScalar A, B; + if (r2 <= (q3 + eps)) + { //<<-- FIXED! + btScalar t = r / sqrt(q3); + if (t < -1) + t = -1; + if (t > 1) + t = 1; + t = acos(t); + a /= 3; + q = -2 * sqrt(q); + x[0] = q * cos(t / 3) - a; + x[1] = q * cos((t + TwoPi) / 3) - a; + x[2] = q * cos((t - TwoPi) / 3) - a; + return (3); + } + else + { + //A =-pow(fabs(r)+sqrt(r2-q3),1./3); + A = -root3(fabs(r) + sqrt(r2 - q3)); + if (r < 0) + A = -A; + B = (A == 0 ? 0 : q / A); + + a /= 3; + x[0] = (A + B) - a; + x[1] = -0.5 * (A + B) - a; + x[2] = 0.5 * sqrt(3.) * (A - B); + if (fabs(x[2]) < eps) + { + x[2] = x[1]; + return (2); + } + return (1); + } +} // SolveP3(btScalar *x,btScalar a,btScalar b,btScalar c) { //--------------------------------------------------------------------------- // a>=0! -void CSqrt(btScalar x, btScalar y, btScalar& a, btScalar& b) // returns: a+i*s = sqrt(x+i*y) +void CSqrt(btScalar x, btScalar y, btScalar& a, btScalar& b) // returns: a+i*s = sqrt(x+i*y) { - btScalar r = sqrt(x * x + y * y); - if (y == 0) { - r = sqrt(r); - if (x >= 0) { - a = r; - b = 0; - } - else { - a = 0; - b = r; - } - } - else { // y != 0 - a = sqrt(0.5 * (x + r)); - b = 0.5 * y / a; - } + btScalar r = sqrt(x * x + y * y); + if (y == 0) + { + r = sqrt(r); + if (x >= 0) + { + a = r; + b = 0; + } + else + { + a = 0; + b = r; + } + } + else + { // y != 0 + a = sqrt(0.5 * (x + r)); + b = 0.5 * y / a; + } } //--------------------------------------------------------------------------- -int SolveP4Bi(btScalar* x, btScalar b, btScalar d) // solve equation x^4 + b*x^2 + d = 0 +int SolveP4Bi(btScalar* x, btScalar b, btScalar d) // solve equation x^4 + b*x^2 + d = 0 { - btScalar D = b * b - 4 * d; - if (D >= 0) { - btScalar sD = sqrt(D); - btScalar x1 = (-b + sD) / 2; - btScalar x2 = (-b - sD) / 2; // x2 <= x1 - if (x2 >= 0) // 0 <= x2 <= x1, 4 real roots - { - btScalar sx1 = sqrt(x1); - btScalar sx2 = sqrt(x2); - x[0] = -sx1; - x[1] = sx1; - x[2] = -sx2; - x[3] = sx2; - return 4; - } - if (x1 < 0) // x2 <= x1 < 0, two pair of imaginary roots - { - btScalar sx1 = sqrt(-x1); - btScalar sx2 = sqrt(-x2); - x[0] = 0; - x[1] = sx1; - x[2] = 0; - x[3] = sx2; - return 0; - } - // now x2 < 0 <= x1 , two real roots and one pair of imginary root - btScalar sx1 = sqrt(x1); - btScalar sx2 = sqrt(-x2); - x[0] = -sx1; - x[1] = sx1; - x[2] = 0; - x[3] = sx2; - return 2; - } - else { // if( D < 0 ), two pair of compex roots - btScalar sD2 = 0.5 * sqrt(-D); - CSqrt(-0.5 * b, sD2, x[0], x[1]); - CSqrt(-0.5 * b, -sD2, x[2], x[3]); - return 0; - } // if( D>=0 ) -} // SolveP4Bi(btScalar *x, btScalar b, btScalar d) // solve equation x^4 + b*x^2 d + btScalar D = b * b - 4 * d; + if (D >= 0) + { + btScalar sD = sqrt(D); + btScalar x1 = (-b + sD) / 2; + btScalar x2 = (-b - sD) / 2; // x2 <= x1 + if (x2 >= 0) // 0 <= x2 <= x1, 4 real roots + { + btScalar sx1 = sqrt(x1); + btScalar sx2 = sqrt(x2); + x[0] = -sx1; + x[1] = sx1; + x[2] = -sx2; + x[3] = sx2; + return 4; + } + if (x1 < 0) // x2 <= x1 < 0, two pair of imaginary roots + { + btScalar sx1 = sqrt(-x1); + btScalar sx2 = sqrt(-x2); + x[0] = 0; + x[1] = sx1; + x[2] = 0; + x[3] = sx2; + return 0; + } + // now x2 < 0 <= x1 , two real roots and one pair of imginary root + btScalar sx1 = sqrt(x1); + btScalar sx2 = sqrt(-x2); + x[0] = -sx1; + x[1] = sx1; + x[2] = 0; + x[3] = sx2; + return 2; + } + else + { // if( D < 0 ), two pair of compex roots + btScalar sD2 = 0.5 * sqrt(-D); + CSqrt(-0.5 * b, sD2, x[0], x[1]); + CSqrt(-0.5 * b, -sD2, x[2], x[3]); + return 0; + } // if( D>=0 ) +} // SolveP4Bi(btScalar *x, btScalar b, btScalar d) // solve equation x^4 + b*x^2 d //--------------------------------------------------------------------------- #define SWAP(a, b) \ -{ \ -t = b; \ -b = a; \ -a = t; \ -} -static void dblSort3(btScalar& a, btScalar& b, btScalar& c) // make: a <= b <= c + { \ + t = b; \ + b = a; \ + a = t; \ + } +static void dblSort3(btScalar& a, btScalar& b, btScalar& c) // make: a <= b <= c { - btScalar t; - if (a > b) - SWAP(a, b); // now a<=b - if (c < b) { - SWAP(b, c); // now a<=b, b<=c - if (a > b) - SWAP(a, b); // now a<=b - } + btScalar t; + if (a > b) + SWAP(a, b); // now a<=b + if (c < b) + { + SWAP(b, c); // now a<=b, b<=c + if (a > b) + SWAP(a, b); // now a<=b + } } //--------------------------------------------------------------------------- -int SolveP4De(btScalar* x, btScalar b, btScalar c, btScalar d) // solve equation x^4 + b*x^2 + c*x + d +int SolveP4De(btScalar* x, btScalar b, btScalar c, btScalar d) // solve equation x^4 + b*x^2 + c*x + d { - //if( c==0 ) return SolveP4Bi(x,b,d); // After that, c!=0 - if (fabs(c) < 1e-14 * (fabs(b) + fabs(d))) - return SolveP4Bi(x, b, d); // After that, c!=0 - - int res3 = SolveP3(x, 2 * b, b * b - 4 * d, -c * c); // solve resolvent - // by Viet theorem: x1*x2*x3=-c*c not equals to 0, so x1!=0, x2!=0, x3!=0 - if (res3 > 1) // 3 real roots, - { - dblSort3(x[0], x[1], x[2]); // sort roots to x[0] <= x[1] <= x[2] - // Note: x[0]*x[1]*x[2]= c*c > 0 - if (x[0] > 0) // all roots are positive - { - btScalar sz1 = sqrt(x[0]); - btScalar sz2 = sqrt(x[1]); - btScalar sz3 = sqrt(x[2]); - // Note: sz1*sz2*sz3= -c (and not equal to 0) - if (c > 0) { - x[0] = (-sz1 - sz2 - sz3) / 2; - x[1] = (-sz1 + sz2 + sz3) / 2; - x[2] = (+sz1 - sz2 + sz3) / 2; - x[3] = (+sz1 + sz2 - sz3) / 2; - return 4; - } - // now: c<0 - x[0] = (-sz1 - sz2 + sz3) / 2; - x[1] = (-sz1 + sz2 - sz3) / 2; - x[2] = (+sz1 - sz2 - sz3) / 2; - x[3] = (+sz1 + sz2 + sz3) / 2; - return 4; - } // if( x[0] > 0) // all roots are positive - // now x[0] <= x[1] < 0, x[2] > 0 - // two pair of comlex roots - btScalar sz1 = sqrt(-x[0]); - btScalar sz2 = sqrt(-x[1]); - btScalar sz3 = sqrt(x[2]); - - if (c > 0) // sign = -1 - { - x[0] = -sz3 / 2; - x[1] = (sz1 - sz2) / 2; // x[0]i*x[1] - x[2] = sz3 / 2; - x[3] = (-sz1 - sz2) / 2; // x[2]i*x[3] - return 0; - } - // now: c<0 , sign = +1 - x[0] = sz3 / 2; - x[1] = (-sz1 + sz2) / 2; - x[2] = -sz3 / 2; - x[3] = (sz1 + sz2) / 2; - return 0; - } // if( res3>1 ) // 3 real roots, - // now resoventa have 1 real and pair of compex roots - // x[0] - real root, and x[0]>0, - // x[1]i*x[2] - complex roots, - // x[0] must be >=0. But one times x[0]=~ 1e-17, so: - if (x[0] < 0) - x[0] = 0; - btScalar sz1 = sqrt(x[0]); - btScalar szr, szi; - CSqrt(x[1], x[2], szr, szi); // (szr+i*szi)^2 = x[1]+i*x[2] - if (c > 0) // sign = -1 - { - x[0] = -sz1 / 2 - szr; // 1st real root - x[1] = -sz1 / 2 + szr; // 2nd real root - x[2] = sz1 / 2; - x[3] = szi; - return 2; - } - // now: c<0 , sign = +1 - x[0] = sz1 / 2 - szr; // 1st real root - x[1] = sz1 / 2 + szr; // 2nd real root - x[2] = -sz1 / 2; - x[3] = szi; - return 2; -} // SolveP4De(btScalar *x, btScalar b, btScalar c, btScalar d) // solve equation x^4 + b*x^2 + c*x + d + //if( c==0 ) return SolveP4Bi(x,b,d); // After that, c!=0 + if (fabs(c) < 1e-14 * (fabs(b) + fabs(d))) + return SolveP4Bi(x, b, d); // After that, c!=0 + + int res3 = SolveP3(x, 2 * b, b * b - 4 * d, -c * c); // solve resolvent + // by Viet theorem: x1*x2*x3=-c*c not equals to 0, so x1!=0, x2!=0, x3!=0 + if (res3 > 1) // 3 real roots, + { + dblSort3(x[0], x[1], x[2]); // sort roots to x[0] <= x[1] <= x[2] + // Note: x[0]*x[1]*x[2]= c*c > 0 + if (x[0] > 0) // all roots are positive + { + btScalar sz1 = sqrt(x[0]); + btScalar sz2 = sqrt(x[1]); + btScalar sz3 = sqrt(x[2]); + // Note: sz1*sz2*sz3= -c (and not equal to 0) + if (c > 0) + { + x[0] = (-sz1 - sz2 - sz3) / 2; + x[1] = (-sz1 + sz2 + sz3) / 2; + x[2] = (+sz1 - sz2 + sz3) / 2; + x[3] = (+sz1 + sz2 - sz3) / 2; + return 4; + } + // now: c<0 + x[0] = (-sz1 - sz2 + sz3) / 2; + x[1] = (-sz1 + sz2 - sz3) / 2; + x[2] = (+sz1 - sz2 - sz3) / 2; + x[3] = (+sz1 + sz2 + sz3) / 2; + return 4; + } // if( x[0] > 0) // all roots are positive + // now x[0] <= x[1] < 0, x[2] > 0 + // two pair of comlex roots + btScalar sz1 = sqrt(-x[0]); + btScalar sz2 = sqrt(-x[1]); + btScalar sz3 = sqrt(x[2]); + + if (c > 0) // sign = -1 + { + x[0] = -sz3 / 2; + x[1] = (sz1 - sz2) / 2; // x[0]i*x[1] + x[2] = sz3 / 2; + x[3] = (-sz1 - sz2) / 2; // x[2]i*x[3] + return 0; + } + // now: c<0 , sign = +1 + x[0] = sz3 / 2; + x[1] = (-sz1 + sz2) / 2; + x[2] = -sz3 / 2; + x[3] = (sz1 + sz2) / 2; + return 0; + } // if( res3>1 ) // 3 real roots, + // now resoventa have 1 real and pair of compex roots + // x[0] - real root, and x[0]>0, + // x[1]i*x[2] - complex roots, + // x[0] must be >=0. But one times x[0]=~ 1e-17, so: + if (x[0] < 0) + x[0] = 0; + btScalar sz1 = sqrt(x[0]); + btScalar szr, szi; + CSqrt(x[1], x[2], szr, szi); // (szr+i*szi)^2 = x[1]+i*x[2] + if (c > 0) // sign = -1 + { + x[0] = -sz1 / 2 - szr; // 1st real root + x[1] = -sz1 / 2 + szr; // 2nd real root + x[2] = sz1 / 2; + x[3] = szi; + return 2; + } + // now: c<0 , sign = +1 + x[0] = sz1 / 2 - szr; // 1st real root + x[1] = sz1 / 2 + szr; // 2nd real root + x[2] = -sz1 / 2; + x[3] = szi; + return 2; +} // SolveP4De(btScalar *x, btScalar b, btScalar c, btScalar d) // solve equation x^4 + b*x^2 + c*x + d //----------------------------------------------------------------------------- -btScalar N4Step(btScalar x, btScalar a, btScalar b, btScalar c, btScalar d) // one Newton step for x^4 + a*x^3 + b*x^2 + c*x + d +btScalar N4Step(btScalar x, btScalar a, btScalar b, btScalar c, btScalar d) // one Newton step for x^4 + a*x^3 + b*x^2 + c*x + d { - btScalar fxs = ((4 * x + 3 * a) * x + 2 * b) * x + c; // f'(x) - if (fxs == 0) - return x; //return 1e99; <<-- FIXED! - btScalar fx = (((x + a) * x + b) * x + c) * x + d; // f(x) - return x - fx / fxs; + btScalar fxs = ((4 * x + 3 * a) * x + 2 * b) * x + c; // f'(x) + if (fxs == 0) + return x; //return 1e99; <<-- FIXED! + btScalar fx = (((x + a) * x + b) * x + c) * x + d; // f(x) + return x - fx / fxs; } //----------------------------------------------------------------------------- // x - array of size 4 @@ -284,136 +298,150 @@ btScalar N4Step(btScalar x, btScalar a, btScalar b, btScalar c, btScalar d) // o // return 2: 2 real roots x[0], x[1] and complex x[2]i*x[3], // return 0: two pair of complex roots: x[0]i*x[1], x[2]i*x[3], int SolveP4(btScalar* x, btScalar a, btScalar b, btScalar c, btScalar d) -{ // solve equation x^4 + a*x^3 + b*x^2 + c*x + d by Dekart-Euler method - // move to a=0: - btScalar d1 = d + 0.25 * a * (0.25 * b * a - 3. / 64 * a * a * a - c); - btScalar c1 = c + 0.5 * a * (0.25 * a * a - b); - btScalar b1 = b - 0.375 * a * a; - int res = SolveP4De(x, b1, c1, d1); - if (res == 4) { - x[0] -= a / 4; - x[1] -= a / 4; - x[2] -= a / 4; - x[3] -= a / 4; - } - else if (res == 2) { - x[0] -= a / 4; - x[1] -= a / 4; - x[2] -= a / 4; - } - else { - x[0] -= a / 4; - x[2] -= a / 4; - } - // one Newton step for each real root: - if (res > 0) { - x[0] = N4Step(x[0], a, b, c, d); - x[1] = N4Step(x[1], a, b, c, d); - } - if (res > 2) { - x[2] = N4Step(x[2], a, b, c, d); - x[3] = N4Step(x[3], a, b, c, d); - } - return res; +{ // solve equation x^4 + a*x^3 + b*x^2 + c*x + d by Dekart-Euler method + // move to a=0: + btScalar d1 = d + 0.25 * a * (0.25 * b * a - 3. / 64 * a * a * a - c); + btScalar c1 = c + 0.5 * a * (0.25 * a * a - b); + btScalar b1 = b - 0.375 * a * a; + int res = SolveP4De(x, b1, c1, d1); + if (res == 4) + { + x[0] -= a / 4; + x[1] -= a / 4; + x[2] -= a / 4; + x[3] -= a / 4; + } + else if (res == 2) + { + x[0] -= a / 4; + x[1] -= a / 4; + x[2] -= a / 4; + } + else + { + x[0] -= a / 4; + x[2] -= a / 4; + } + // one Newton step for each real root: + if (res > 0) + { + x[0] = N4Step(x[0], a, b, c, d); + x[1] = N4Step(x[1], a, b, c, d); + } + if (res > 2) + { + x[2] = N4Step(x[2], a, b, c, d); + x[3] = N4Step(x[3], a, b, c, d); + } + return res; } //----------------------------------------------------------------------------- #define F5(t) (((((t + a) * t + b) * t + c) * t + d) * t + e) //----------------------------------------------------------------------------- -btScalar SolveP5_1(btScalar a, btScalar b, btScalar c, btScalar d, btScalar e) // return real root of x^5 + a*x^4 + b*x^3 + c*x^2 + d*x + e = 0 +btScalar SolveP5_1(btScalar a, btScalar b, btScalar c, btScalar d, btScalar e) // return real root of x^5 + a*x^4 + b*x^3 + c*x^2 + d*x + e = 0 { - int cnt; - if (fabs(e) < eps) - return 0; - - btScalar brd = fabs(a); // brd - border of real roots - if (fabs(b) > brd) - brd = fabs(b); - if (fabs(c) > brd) - brd = fabs(c); - if (fabs(d) > brd) - brd = fabs(d); - if (fabs(e) > brd) - brd = fabs(e); - brd++; // brd - border of real roots - - btScalar x0, f0; // less than root - btScalar x1, f1; // greater than root - btScalar x2, f2, f2s; // next values, f(x2), f'(x2) - btScalar dx = 0; - - if (e < 0) { - x0 = 0; - x1 = brd; - f0 = e; - f1 = F5(x1); - x2 = 0.01 * brd; - } // positive root - else { - x0 = -brd; - x1 = 0; - f0 = F5(x0); - f1 = e; - x2 = -0.01 * brd; - } // negative root - - if (fabs(f0) < eps) - return x0; - if (fabs(f1) < eps) - return x1; - - // now x0<x1, f(x0)<0, f(x1)>0 - // Firstly 10 bisections - for (cnt = 0; cnt < 10; cnt++) { - x2 = (x0 + x1) / 2; // next point - //x2 = x0 - f0*(x1 - x0) / (f1 - f0); // next point - f2 = F5(x2); // f(x2) - if (fabs(f2) < eps) - return x2; - if (f2 > 0) { - x1 = x2; - f1 = f2; - } - else { - x0 = x2; - f0 = f2; - } - } - - // At each step: - // x0<x1, f(x0)<0, f(x1)>0. - // x2 - next value - // we hope that x0 < x2 < x1, but not necessarily - do { - if (cnt++ > 50) - break; - if (x2 <= x0 || x2 >= x1) - x2 = (x0 + x1) / 2; // now x0 < x2 < x1 - f2 = F5(x2); // f(x2) - if (fabs(f2) < eps) - return x2; - if (f2 > 0) { - x1 = x2; - f1 = f2; - } - else { - x0 = x2; - f0 = f2; - } - f2s = (((5 * x2 + 4 * a) * x2 + 3 * b) * x2 + 2 * c) * x2 + d; // f'(x2) - if (fabs(f2s) < eps) { - x2 = 1e99; - continue; - } - dx = f2 / f2s; - x2 -= dx; - } while (fabs(dx) > eps); - return x2; -} // SolveP5_1(btScalar a,btScalar b,btScalar c,btScalar d,btScalar e) // return real root of x^5 + a*x^4 + b*x^3 + c*x^2 + d*x + e = 0 + int cnt; + if (fabs(e) < eps) + return 0; + + btScalar brd = fabs(a); // brd - border of real roots + if (fabs(b) > brd) + brd = fabs(b); + if (fabs(c) > brd) + brd = fabs(c); + if (fabs(d) > brd) + brd = fabs(d); + if (fabs(e) > brd) + brd = fabs(e); + brd++; // brd - border of real roots + + btScalar x0, f0; // less than root + btScalar x1, f1; // greater than root + btScalar x2, f2, f2s; // next values, f(x2), f'(x2) + btScalar dx = 0; + + if (e < 0) + { + x0 = 0; + x1 = brd; + f0 = e; + f1 = F5(x1); + x2 = 0.01 * brd; + } // positive root + else + { + x0 = -brd; + x1 = 0; + f0 = F5(x0); + f1 = e; + x2 = -0.01 * brd; + } // negative root + + if (fabs(f0) < eps) + return x0; + if (fabs(f1) < eps) + return x1; + + // now x0<x1, f(x0)<0, f(x1)>0 + // Firstly 10 bisections + for (cnt = 0; cnt < 10; cnt++) + { + x2 = (x0 + x1) / 2; // next point + //x2 = x0 - f0*(x1 - x0) / (f1 - f0); // next point + f2 = F5(x2); // f(x2) + if (fabs(f2) < eps) + return x2; + if (f2 > 0) + { + x1 = x2; + f1 = f2; + } + else + { + x0 = x2; + f0 = f2; + } + } + + // At each step: + // x0<x1, f(x0)<0, f(x1)>0. + // x2 - next value + // we hope that x0 < x2 < x1, but not necessarily + do + { + if (cnt++ > 50) + break; + if (x2 <= x0 || x2 >= x1) + x2 = (x0 + x1) / 2; // now x0 < x2 < x1 + f2 = F5(x2); // f(x2) + if (fabs(f2) < eps) + return x2; + if (f2 > 0) + { + x1 = x2; + f1 = f2; + } + else + { + x0 = x2; + f0 = f2; + } + f2s = (((5 * x2 + 4 * a) * x2 + 3 * b) * x2 + 2 * c) * x2 + d; // f'(x2) + if (fabs(f2s) < eps) + { + x2 = 1e99; + continue; + } + dx = f2 / f2s; + x2 -= dx; + } while (fabs(dx) > eps); + return x2; +} // SolveP5_1(btScalar a,btScalar b,btScalar c,btScalar d,btScalar e) // return real root of x^5 + a*x^4 + b*x^3 + c*x^2 + d*x + e = 0 //----------------------------------------------------------------------------- -int SolveP5(btScalar* x, btScalar a, btScalar b, btScalar c, btScalar d, btScalar e) // solve equation x^5 + a*x^4 + b*x^3 + c*x^2 + d*x + e = 0 +int SolveP5(btScalar* x, btScalar a, btScalar b, btScalar c, btScalar d, btScalar e) // solve equation x^5 + a*x^4 + b*x^3 + c*x^2 + d*x + e = 0 { - btScalar r = x[0] = SolveP5_1(a, b, c, d, e); - btScalar a1 = a + r, b1 = b + r * a1, c1 = c + r * b1, d1 = d + r * c1; - return 1 + SolveP4(x + 1, a1, b1, c1, d1); -} // SolveP5(btScalar *x,btScalar a,btScalar b,btScalar c,btScalar d,btScalar e) // solve equation x^5 + a*x^4 + b*x^3 + c*x^2 + d*x + e = 0 + btScalar r = x[0] = SolveP5_1(a, b, c, d, e); + btScalar a1 = a + r, b1 = b + r * a1, c1 = c + r * b1, d1 = d + r * c1; + return 1 + SolveP4(x + 1, a1, b1, c1, d1); +} // SolveP5(btScalar *x,btScalar a,btScalar b,btScalar c,btScalar d,btScalar e) // solve equation x^5 + a*x^4 + b*x^3 + c*x^2 + d*x + e = 0 //----------------------------------------------------------------------------- diff --git a/thirdparty/bullet/BulletSoftBody/poly34.h b/thirdparty/bullet/BulletSoftBody/poly34.h index 32ad5d7da5..35a52c5fec 100644 --- a/thirdparty/bullet/BulletSoftBody/poly34.h +++ b/thirdparty/bullet/BulletSoftBody/poly34.h @@ -8,31 +8,31 @@ // x - array of size 2 // return 2: 2 real roots x[0], x[1] // return 0: pair of complex roots: x[0]i*x[1] -int SolveP2(btScalar* x, btScalar a, btScalar b); // solve equation x^2 + a*x + b = 0 +int SolveP2(btScalar* x, btScalar a, btScalar b); // solve equation x^2 + a*x + b = 0 // x - array of size 3 // return 3: 3 real roots x[0], x[1], x[2] // return 1: 1 real root x[0] and pair of complex roots: x[1]i*x[2] -int SolveP3(btScalar* x, btScalar a, btScalar b, btScalar c); // solve cubic equation x^3 + a*x^2 + b*x + c = 0 +int SolveP3(btScalar* x, btScalar a, btScalar b, btScalar c); // solve cubic equation x^3 + a*x^2 + b*x + c = 0 // x - array of size 4 // return 4: 4 real roots x[0], x[1], x[2], x[3], possible multiple roots // return 2: 2 real roots x[0], x[1] and complex x[2]i*x[3], // return 0: two pair of complex roots: x[0]i*x[1], x[2]i*x[3], -int SolveP4(btScalar* x, btScalar a, btScalar b, btScalar c, btScalar d); // solve equation x^4 + a*x^3 + b*x^2 + c*x + d = 0 by Dekart-Euler method +int SolveP4(btScalar* x, btScalar a, btScalar b, btScalar c, btScalar d); // solve equation x^4 + a*x^3 + b*x^2 + c*x + d = 0 by Dekart-Euler method // x - array of size 5 // return 5: 5 real roots x[0], x[1], x[2], x[3], x[4], possible multiple roots // return 3: 3 real roots x[0], x[1], x[2] and complex x[3]i*x[4], // return 1: 1 real root x[0] and two pair of complex roots: x[1]i*x[2], x[3]i*x[4], -int SolveP5(btScalar* x, btScalar a, btScalar b, btScalar c, btScalar d, btScalar e); // solve equation x^5 + a*x^4 + b*x^3 + c*x^2 + d*x + e = 0 +int SolveP5(btScalar* x, btScalar a, btScalar b, btScalar c, btScalar d, btScalar e); // solve equation x^5 + a*x^4 + b*x^3 + c*x^2 + d*x + e = 0 //----------------------------------------------------------------------------- // And some additional functions for internal use. // Your may remove this definitions from here -int SolveP4Bi(btScalar* x, btScalar b, btScalar d); // solve equation x^4 + b*x^2 + d = 0 -int SolveP4De(btScalar* x, btScalar b, btScalar c, btScalar d); // solve equation x^4 + b*x^2 + c*x + d = 0 -void CSqrt(btScalar x, btScalar y, btScalar& a, btScalar& b); // returns as a+i*s, sqrt(x+i*y) -btScalar N4Step(btScalar x, btScalar a, btScalar b, btScalar c, btScalar d); // one Newton step for x^4 + a*x^3 + b*x^2 + c*x + d -btScalar SolveP5_1(btScalar a, btScalar b, btScalar c, btScalar d, btScalar e); // return real root of x^5 + a*x^4 + b*x^3 + c*x^2 + d*x + e = 0 +int SolveP4Bi(btScalar* x, btScalar b, btScalar d); // solve equation x^4 + b*x^2 + d = 0 +int SolveP4De(btScalar* x, btScalar b, btScalar c, btScalar d); // solve equation x^4 + b*x^2 + c*x + d = 0 +void CSqrt(btScalar x, btScalar y, btScalar& a, btScalar& b); // returns as a+i*s, sqrt(x+i*y) +btScalar N4Step(btScalar x, btScalar a, btScalar b, btScalar c, btScalar d); // one Newton step for x^4 + a*x^3 + b*x^2 + c*x + d +btScalar SolveP5_1(btScalar a, btScalar b, btScalar c, btScalar d, btScalar e); // return real root of x^5 + a*x^4 + b*x^3 + c*x^2 + d*x + e = 0 #endif diff --git a/thirdparty/bullet/LinearMath/btAlignedAllocator.cpp b/thirdparty/bullet/LinearMath/btAlignedAllocator.cpp index 39b302b600..be8f8aa6d0 100644 --- a/thirdparty/bullet/LinearMath/btAlignedAllocator.cpp +++ b/thirdparty/bullet/LinearMath/btAlignedAllocator.cpp @@ -138,7 +138,7 @@ struct btDebugPtrMagic }; }; -void *btAlignedAllocInternal(size_t size, int alignment, int line, char *filename) +void *btAlignedAllocInternal(size_t size, int alignment, int line, const char *filename) { if (size == 0) { @@ -195,7 +195,7 @@ void *btAlignedAllocInternal(size_t size, int alignment, int line, char *filenam return (ret); } -void btAlignedFreeInternal(void *ptr, int line, char *filename) +void btAlignedFreeInternal(void *ptr, int line, const char *filename) { void *real; diff --git a/thirdparty/bullet/LinearMath/btAlignedAllocator.h b/thirdparty/bullet/LinearMath/btAlignedAllocator.h index ce4d3585f1..971f62bfb0 100644 --- a/thirdparty/bullet/LinearMath/btAlignedAllocator.h +++ b/thirdparty/bullet/LinearMath/btAlignedAllocator.h @@ -35,9 +35,9 @@ int btDumpMemoryLeaks(); #define btAlignedFree(ptr) \ btAlignedFreeInternal(ptr, __LINE__, __FILE__) -void* btAlignedAllocInternal(size_t size, int alignment, int line, char* filename); +void* btAlignedAllocInternal(size_t size, int alignment, int line, const char* filename); -void btAlignedFreeInternal(void* ptr, int line, char* filename); +void btAlignedFreeInternal(void* ptr, int line, const char* filename); #else void* btAlignedAllocInternal(size_t size, int alignment); diff --git a/thirdparty/bullet/LinearMath/btConvexHullComputer.cpp b/thirdparty/bullet/LinearMath/btConvexHullComputer.cpp index 8bbfdc5f25..12125fd2de 100644 --- a/thirdparty/bullet/LinearMath/btConvexHullComputer.cpp +++ b/thirdparty/bullet/LinearMath/btConvexHullComputer.cpp @@ -105,7 +105,7 @@ public: Point64 cross(const Point32& b) const { - return Point64(y * b.z - z * b.y, z * b.x - x * b.z, x * b.y - y * b.x); + return Point64(((int64_t)y) * b.z - ((int64_t)z) * b.y, ((int64_t)z) * b.x - ((int64_t)x) * b.z, ((int64_t)x) * b.y - ((int64_t)y) * b.x); } Point64 cross(const Point64& b) const @@ -115,7 +115,7 @@ public: int64_t dot(const Point32& b) const { - return x * b.x + y * b.y + z * b.z; + return ((int64_t)x) * b.x + ((int64_t)y) * b.y + ((int64_t)z) * b.z; } int64_t dot(const Point64& b) const @@ -2673,6 +2673,7 @@ btScalar btConvexHullComputer::compute(const void* coords, bool doubleCoords, in } vertices.resize(0); + original_vertex_index.resize(0); edges.resize(0); faces.resize(0); @@ -2683,6 +2684,7 @@ btScalar btConvexHullComputer::compute(const void* coords, bool doubleCoords, in { btConvexHullInternal::Vertex* v = oldVertices[copied]; vertices.push_back(hull.getCoordinates(v)); + original_vertex_index.push_back(v->point.index); btConvexHullInternal::Edge* firstEdge = v->edges; if (firstEdge) { diff --git a/thirdparty/bullet/LinearMath/btConvexHullComputer.h b/thirdparty/bullet/LinearMath/btConvexHullComputer.h index cba684f2dc..18b26eea9a 100644 --- a/thirdparty/bullet/LinearMath/btConvexHullComputer.h +++ b/thirdparty/bullet/LinearMath/btConvexHullComputer.h @@ -66,6 +66,9 @@ public: // Vertices of the output hull btAlignedObjectArray<btVector3> vertices; + // The original vertex index in the input coords array + btAlignedObjectArray<int> original_vertex_index; + // Edges of the output hull btAlignedObjectArray<Edge> edges; diff --git a/thirdparty/bullet/LinearMath/btQuickprof.cpp b/thirdparty/bullet/LinearMath/btQuickprof.cpp index 86fd1d7812..33b51eb763 100644 --- a/thirdparty/bullet/LinearMath/btQuickprof.cpp +++ b/thirdparty/bullet/LinearMath/btQuickprof.cpp @@ -720,6 +720,9 @@ void btLeaveProfileZoneDefault() #define BT_HAVE_TLS 1 #elif __linux__ #define BT_HAVE_TLS 1 +#elif defined(__FreeBSD__) || defined(__NetBSD__) + // TODO: At the moment disabling purposely OpenBSD, albeit tls support exists but not fully functioning + #define BT_HAVE_TLS 1 #endif // __thread is broken on Andorid clang until r12b. See diff --git a/thirdparty/bullet/LinearMath/btReducedVector.h b/thirdparty/bullet/LinearMath/btReducedVector.h index 83b5e581e5..313a4271f0 100644 --- a/thirdparty/bullet/LinearMath/btReducedVector.h +++ b/thirdparty/bullet/LinearMath/btReducedVector.h @@ -267,7 +267,7 @@ public: std::sort(tuples.begin(), tuples.end()); btAlignedObjectArray<int> new_indices; btAlignedObjectArray<btVector3> new_vecs; - for (int i = 0; i < tuples.size(); ++i) + for (size_t i = 0; i < tuples.size(); ++i) { new_indices.push_back(tuples[i].b); new_vecs.push_back(m_vecs[tuples[i].a]); diff --git a/thirdparty/bullet/LinearMath/btScalar.h b/thirdparty/bullet/LinearMath/btScalar.h index 86d94e8974..0402146af1 100644 --- a/thirdparty/bullet/LinearMath/btScalar.h +++ b/thirdparty/bullet/LinearMath/btScalar.h @@ -25,7 +25,7 @@ subject to the following restrictions: #include <float.h> /* SVN $Revision$ on $Date$ from http://bullet.googlecode.com*/ -#define BT_BULLET_VERSION 289 +#define BT_BULLET_VERSION 308 inline int btGetVersion() { diff --git a/thirdparty/bullet/LinearMath/btSerializer.h b/thirdparty/bullet/LinearMath/btSerializer.h index 2ee712047f..4d1c760e24 100644 --- a/thirdparty/bullet/LinearMath/btSerializer.h +++ b/thirdparty/bullet/LinearMath/btSerializer.h @@ -479,9 +479,9 @@ public: buffer[8] = 'V'; } - buffer[9] = '2'; - buffer[10] = '8'; - buffer[11] = '9'; + buffer[9] = '3'; + buffer[10] = '0'; + buffer[11] = '8'; } virtual void startSerialization() |