diff options
Diffstat (limited to 'thirdparty/bullet/src/BulletSoftBody')
25 files changed, 10065 insertions, 0 deletions
diff --git a/thirdparty/bullet/src/BulletSoftBody/CMakeLists.txt b/thirdparty/bullet/src/BulletSoftBody/CMakeLists.txt new file mode 100644 index 0000000000..d43df1c67b --- /dev/null +++ b/thirdparty/bullet/src/BulletSoftBody/CMakeLists.txt @@ -0,0 +1,69 @@ + +INCLUDE_DIRECTORIES( +${BULLET_PHYSICS_SOURCE_DIR}/src + +) + +#SUBDIRS( Solvers ) + +SET(BulletSoftBody_SRCS + btSoftBody.cpp + btSoftBodyConcaveCollisionAlgorithm.cpp + btSoftBodyHelpers.cpp + btSoftBodyRigidBodyCollisionConfiguration.cpp + btSoftRigidCollisionAlgorithm.cpp + btSoftRigidDynamicsWorld.cpp + btSoftMultiBodyDynamicsWorld.cpp + btSoftSoftCollisionAlgorithm.cpp + btDefaultSoftBodySolver.cpp + +) + +SET(BulletSoftBody_HDRS + btSoftBody.h + btSoftBodyData.h + btSoftBodyConcaveCollisionAlgorithm.h + btSoftBodyHelpers.h + btSoftBodyRigidBodyCollisionConfiguration.h + btSoftRigidCollisionAlgorithm.h + btSoftRigidDynamicsWorld.h + btSoftMultiBodyDynamicsWorld.h + btSoftSoftCollisionAlgorithm.h + btSparseSDF.h + + btSoftBodySolvers.h + btDefaultSoftBodySolver.h + + btSoftBodySolverVertexBuffer.h +) + + + +ADD_LIBRARY(BulletSoftBody ${BulletSoftBody_SRCS} ${BulletSoftBody_HDRS}) +SET_TARGET_PROPERTIES(BulletSoftBody PROPERTIES VERSION ${BULLET_VERSION}) +SET_TARGET_PROPERTIES(BulletSoftBody PROPERTIES SOVERSION ${BULLET_VERSION}) +IF (BUILD_SHARED_LIBS) + TARGET_LINK_LIBRARIES(BulletSoftBody BulletDynamics) +ENDIF (BUILD_SHARED_LIBS) + +IF (INSTALL_LIBS) + IF (NOT INTERNAL_CREATE_DISTRIBUTABLE_MSVC_PROJECTFILES) + IF (${CMAKE_MAJOR_VERSION}.${CMAKE_MINOR_VERSION} GREATER 2.5) + IF (APPLE AND BUILD_SHARED_LIBS AND FRAMEWORK) + INSTALL(TARGETS BulletSoftBody DESTINATION .) + ELSE (APPLE AND BUILD_SHARED_LIBS AND FRAMEWORK) + INSTALL(TARGETS BulletSoftBody RUNTIME DESTINATION bin + LIBRARY DESTINATION lib${LIB_SUFFIX} + ARCHIVE DESTINATION lib${LIB_SUFFIX}) + INSTALL(DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR} +DESTINATION ${INCLUDE_INSTALL_DIR} FILES_MATCHING PATTERN "*.h" PATTERN +".svn" EXCLUDE PATTERN "CMakeFiles" EXCLUDE) + ENDIF (APPLE AND BUILD_SHARED_LIBS AND FRAMEWORK) + ENDIF (${CMAKE_MAJOR_VERSION}.${CMAKE_MINOR_VERSION} GREATER 2.5) + + IF (APPLE AND BUILD_SHARED_LIBS AND FRAMEWORK) + SET_TARGET_PROPERTIES(BulletSoftBody PROPERTIES FRAMEWORK true) + SET_TARGET_PROPERTIES(BulletSoftBody PROPERTIES PUBLIC_HEADER "${BulletSoftBody_HDRS}") + ENDIF (APPLE AND BUILD_SHARED_LIBS AND FRAMEWORK) + ENDIF (NOT INTERNAL_CREATE_DISTRIBUTABLE_MSVC_PROJECTFILES) +ENDIF (INSTALL_LIBS) diff --git a/thirdparty/bullet/src/BulletSoftBody/btDefaultSoftBodySolver.cpp b/thirdparty/bullet/src/BulletSoftBody/btDefaultSoftBodySolver.cpp new file mode 100644 index 0000000000..9c20403074 --- /dev/null +++ b/thirdparty/bullet/src/BulletSoftBody/btDefaultSoftBodySolver.cpp @@ -0,0 +1,151 @@ +/* +Bullet Continuous Collision Detection and Physics Library +Copyright (c) 2003-2006 Erwin Coumans http://continuousphysics.com/Bullet/ + +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. +*/ + +#include "BulletCollision/CollisionShapes/btTriangleIndexVertexArray.h" +#include "BulletCollision/CollisionDispatch/btCollisionObject.h" +#include "BulletCollision/CollisionShapes/btCollisionShape.h" + +#include "btDefaultSoftBodySolver.h" +#include "BulletCollision/CollisionShapes/btCapsuleShape.h" +#include "BulletSoftBody/btSoftBody.h" + + +btDefaultSoftBodySolver::btDefaultSoftBodySolver() +{ + // Initial we will clearly need to update solver constants + // For now this is global for the cloths linked with this solver - we should probably make this body specific + // for performance in future once we understand more clearly when constants need to be updated + m_updateSolverConstants = true; +} + +btDefaultSoftBodySolver::~btDefaultSoftBodySolver() +{ +} + +// In this case the data is already in the soft bodies so there is no need for us to do anything +void btDefaultSoftBodySolver::copyBackToSoftBodies(bool bMove) +{ + +} + +void btDefaultSoftBodySolver::optimize( btAlignedObjectArray< btSoftBody * > &softBodies , bool forceUpdate) +{ + m_softBodySet.copyFromArray( softBodies ); +} + +void btDefaultSoftBodySolver::updateSoftBodies( ) +{ + for ( int i=0; i < m_softBodySet.size(); i++) + { + btSoftBody* psb=(btSoftBody*)m_softBodySet[i]; + if (psb->isActive()) + { + psb->integrateMotion(); + } + } +} // updateSoftBodies + +bool btDefaultSoftBodySolver::checkInitialized() +{ + return true; +} + +void btDefaultSoftBodySolver::solveConstraints( float solverdt ) +{ + // Solve constraints for non-solver softbodies + for(int i=0; i < m_softBodySet.size(); ++i) + { + btSoftBody* psb = static_cast<btSoftBody*>(m_softBodySet[i]); + if (psb->isActive()) + { + psb->solveConstraints(); + } + } +} // btDefaultSoftBodySolver::solveConstraints + + +void btDefaultSoftBodySolver::copySoftBodyToVertexBuffer( const btSoftBody *const softBody, btVertexBufferDescriptor *vertexBuffer ) +{ + // Currently only support CPU output buffers + // TODO: check for DX11 buffers. Take all offsets into the same DX11 buffer + // and use them together on a single kernel call if possible by setting up a + // per-cloth target buffer array for the copy kernel. + + if( vertexBuffer->getBufferType() == btVertexBufferDescriptor::CPU_BUFFER ) + { + const btAlignedObjectArray<btSoftBody::Node> &clothVertices( softBody->m_nodes ); + int numVertices = clothVertices.size(); + + const btCPUVertexBufferDescriptor *cpuVertexBuffer = static_cast< btCPUVertexBufferDescriptor* >(vertexBuffer); + float *basePointer = cpuVertexBuffer->getBasePointer(); + + if( vertexBuffer->hasVertexPositions() ) + { + const int vertexOffset = cpuVertexBuffer->getVertexOffset(); + const int vertexStride = cpuVertexBuffer->getVertexStride(); + float *vertexPointer = basePointer + vertexOffset; + + for( int vertexIndex = 0; vertexIndex < numVertices; ++vertexIndex ) + { + btVector3 position = clothVertices[vertexIndex].m_x; + *(vertexPointer + 0) = (float)position.getX(); + *(vertexPointer + 1) = (float)position.getY(); + *(vertexPointer + 2) = (float)position.getZ(); + vertexPointer += vertexStride; + } + } + if( vertexBuffer->hasNormals() ) + { + const int normalOffset = cpuVertexBuffer->getNormalOffset(); + const int normalStride = cpuVertexBuffer->getNormalStride(); + float *normalPointer = basePointer + normalOffset; + + for( int vertexIndex = 0; vertexIndex < numVertices; ++vertexIndex ) + { + btVector3 normal = clothVertices[vertexIndex].m_n; + *(normalPointer + 0) = (float)normal.getX(); + *(normalPointer + 1) = (float)normal.getY(); + *(normalPointer + 2) = (float)normal.getZ(); + normalPointer += normalStride; + } + } + } +} // btDefaultSoftBodySolver::copySoftBodyToVertexBuffer + +void btDefaultSoftBodySolver::processCollision( btSoftBody* softBody, btSoftBody* otherSoftBody) +{ + softBody->defaultCollisionHandler( otherSoftBody); +} + +// For the default solver just leave the soft body to do its collision processing +void btDefaultSoftBodySolver::processCollision( btSoftBody *softBody, const btCollisionObjectWrapper* collisionObjectWrap ) +{ + softBody->defaultCollisionHandler( collisionObjectWrap ); +} // btDefaultSoftBodySolver::processCollision + + +void btDefaultSoftBodySolver::predictMotion( float timeStep ) +{ + for ( int i=0; i < m_softBodySet.size(); ++i) + { + btSoftBody* psb = m_softBodySet[i]; + + if (psb->isActive()) + { + psb->predictMotion(timeStep); + } + } +} + diff --git a/thirdparty/bullet/src/BulletSoftBody/btDefaultSoftBodySolver.h b/thirdparty/bullet/src/BulletSoftBody/btDefaultSoftBodySolver.h new file mode 100644 index 0000000000..1c17ffcbb2 --- /dev/null +++ b/thirdparty/bullet/src/BulletSoftBody/btDefaultSoftBodySolver.h @@ -0,0 +1,63 @@ +/* +Bullet Continuous Collision Detection and Physics Library +Copyright (c) 2003-2006 Erwin Coumans http://continuousphysics.com/Bullet/ + +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_SOFT_BODY_DEFAULT_SOLVER_H +#define BT_SOFT_BODY_DEFAULT_SOLVER_H + + +#include "BulletSoftBody/btSoftBodySolvers.h" +#include "btSoftBodySolverVertexBuffer.h" +struct btCollisionObjectWrapper; + +class btDefaultSoftBodySolver : public btSoftBodySolver +{ +protected: + /** Variable to define whether we need to update solver constants on the next iteration */ + bool m_updateSolverConstants; + + btAlignedObjectArray< btSoftBody * > m_softBodySet; + + +public: + btDefaultSoftBodySolver(); + + virtual ~btDefaultSoftBodySolver(); + + virtual SolverTypes getSolverType() const + { + return DEFAULT_SOLVER; + } + + virtual bool checkInitialized(); + + virtual void updateSoftBodies( ); + + virtual void optimize( btAlignedObjectArray< btSoftBody * > &softBodies,bool forceUpdate=false ); + + virtual void copyBackToSoftBodies(bool bMove = true); + + virtual void solveConstraints( float solverdt ); + + virtual void predictMotion( float solverdt ); + + virtual void copySoftBodyToVertexBuffer( const btSoftBody *const softBody, btVertexBufferDescriptor *vertexBuffer ); + + virtual void processCollision( btSoftBody *, const btCollisionObjectWrapper* ); + + virtual void processCollision( btSoftBody*, btSoftBody* ); + +}; + +#endif // #ifndef BT_ACCELERATED_SOFT_BODY_CPU_SOLVER_H diff --git a/thirdparty/bullet/src/BulletSoftBody/btSoftBody.cpp b/thirdparty/bullet/src/BulletSoftBody/btSoftBody.cpp new file mode 100644 index 0000000000..48efb0d8d4 --- /dev/null +++ b/thirdparty/bullet/src/BulletSoftBody/btSoftBody.cpp @@ -0,0 +1,3709 @@ +/* +Bullet Continuous Collision Detection and Physics Library +Copyright (c) 2003-2006 Erwin Coumans http://continuousphysics.com/Bullet/ + +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. +*/ +///btSoftBody implementation by Nathanael Presson + +#include "btSoftBodyInternals.h" +#include "BulletSoftBody/btSoftBodySolvers.h" +#include "btSoftBodyData.h" +#include "LinearMath/btSerializer.h" +#include "BulletDynamics/Featherstone/btMultiBodyLinkCollider.h" +#include "BulletDynamics/Featherstone/btMultiBodyConstraint.h" + + +// +btSoftBody::btSoftBody(btSoftBodyWorldInfo* worldInfo,int node_count, const btVector3* x, const btScalar* m) +:m_softBodySolver(0),m_worldInfo(worldInfo) +{ + /* Init */ + initDefaults(); + + /* Default material */ + Material* pm=appendMaterial(); + pm->m_kLST = 1; + pm->m_kAST = 1; + pm->m_kVST = 1; + pm->m_flags = fMaterial::Default; + + /* Nodes */ + const btScalar margin=getCollisionShape()->getMargin(); + m_nodes.resize(node_count); + for(int i=0,ni=node_count;i<ni;++i) + { + Node& n=m_nodes[i]; + ZeroInitialize(n); + n.m_x = x?*x++:btVector3(0,0,0); + n.m_q = n.m_x; + n.m_im = m?*m++:1; + 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; + } + updateBounds(); + +} + +btSoftBody::btSoftBody(btSoftBodyWorldInfo* worldInfo) +:m_worldInfo(worldInfo) +{ + initDefaults(); +} + + +void btSoftBody::initDefaults() +{ + m_internalType = CO_SOFT_BODY; + m_cfg.aeromodel = eAeroModel::V_Point; + m_cfg.kVCF = 1; + m_cfg.kDG = 0; + m_cfg.kLF = 0; + m_cfg.kDP = 0; + m_cfg.kPR = 0; + m_cfg.kVC = 0; + m_cfg.kDF = (btScalar)0.2; + m_cfg.kMT = 0; + m_cfg.kCHR = (btScalar)1.0; + m_cfg.kKHR = (btScalar)0.1; + m_cfg.kSHR = (btScalar)1.0; + m_cfg.kAHR = (btScalar)0.7; + m_cfg.kSRHR_CL = (btScalar)0.1; + m_cfg.kSKHR_CL = (btScalar)1; + m_cfg.kSSHR_CL = (btScalar)0.5; + m_cfg.kSR_SPLT_CL = (btScalar)0.5; + m_cfg.kSK_SPLT_CL = (btScalar)0.5; + m_cfg.kSS_SPLT_CL = (btScalar)0.5; + m_cfg.maxvolume = (btScalar)1; + m_cfg.timescale = 1; + m_cfg.viterations = 0; + m_cfg.piterations = 1; + m_cfg.diterations = 0; + m_cfg.citerations = 4; + m_cfg.collisions = fCollision::Default; + m_pose.m_bvolume = false; + m_pose.m_bframe = false; + m_pose.m_volume = 0; + m_pose.m_com = btVector3(0,0,0); + m_pose.m_rot.setIdentity(); + m_pose.m_scl.setIdentity(); + m_tag = 0; + m_timeacc = 0; + m_bUpdateRtCst = true; + m_bounds[0] = btVector3(0,0,0); + m_bounds[1] = btVector3(0,0,0); + m_worldTransform.setIdentity(); + setSolver(eSolverPresets::Positions); + + /* Collision shape */ + ///for now, create a collision shape internally + m_collisionShape = new btSoftBodyCollisionShape(this); + m_collisionShape->setMargin(0.25f); + + m_initialWorldTransform.setIdentity(); + + m_windVelocity = btVector3(0,0,0); + m_restLengthScale = btScalar(1.0); +} + +// +btSoftBody::~btSoftBody() +{ + //for now, delete the internal shape + delete m_collisionShape; + int i; + + releaseClusters(); + for(i=0;i<m_materials.size();++i) + btAlignedFree(m_materials[i]); + for(i=0;i<m_joints.size();++i) + btAlignedFree(m_joints[i]); +} + +// +bool btSoftBody::checkLink(int node0,int node1) const +{ + return(checkLink(&m_nodes[node0],&m_nodes[node1])); +} + +// +bool btSoftBody::checkLink(const Node* node0,const Node* node1) const +{ + const Node* n[]={node0,node1}; + for(int i=0,ni=m_links.size();i<ni;++i) + { + const Link& l=m_links[i]; + if( (l.m_n[0]==n[0]&&l.m_n[1]==n[1])|| + (l.m_n[0]==n[1]&&l.m_n[1]==n[0])) + { + return(true); + } + } + return(false); +} + +// +bool btSoftBody::checkFace(int node0,int node1,int node2) const +{ + const Node* n[]={ &m_nodes[node0], + &m_nodes[node1], + &m_nodes[node2]}; + for(int i=0,ni=m_faces.size();i<ni;++i) + { + const Face& f=m_faces[i]; + int c=0; + for(int j=0;j<3;++j) + { + if( (f.m_n[j]==n[0])|| + (f.m_n[j]==n[1])|| + (f.m_n[j]==n[2])) c|=1<<j; else break; + } + if(c==7) return(true); + } + return(false); +} + +// +btSoftBody::Material* btSoftBody::appendMaterial() +{ + Material* pm=new(btAlignedAlloc(sizeof(Material),16)) Material(); + if(m_materials.size()>0) + *pm=*m_materials[0]; + else + ZeroInitialize(*pm); + m_materials.push_back(pm); + return(pm); +} + +// +void btSoftBody::appendNote( const char* text, + const btVector3& o, + const btVector4& c, + Node* n0, + Node* n1, + Node* n2, + Node* n3) +{ + Note n; + ZeroInitialize(n); + n.m_rank = 0; + n.m_text = text; + n.m_offset = o; + n.m_coords[0] = c.x(); + n.m_coords[1] = c.y(); + n.m_coords[2] = c.z(); + n.m_coords[3] = c.w(); + n.m_nodes[0] = n0;n.m_rank+=n0?1:0; + n.m_nodes[1] = n1;n.m_rank+=n1?1:0; + n.m_nodes[2] = n2;n.m_rank+=n2?1:0; + n.m_nodes[3] = n3;n.m_rank+=n3?1:0; + m_notes.push_back(n); +} + +// +void btSoftBody::appendNote( const char* text, + const btVector3& o, + Node* feature) +{ + appendNote(text,o,btVector4(1,0,0,0),feature); +} + +// +void btSoftBody::appendNote( const char* text, + const btVector3& o, + Link* feature) +{ + static const btScalar w=1/(btScalar)2; + appendNote(text,o,btVector4(w,w,0,0), feature->m_n[0], + feature->m_n[1]); +} + +// +void btSoftBody::appendNote( const char* text, + const btVector3& o, + Face* feature) +{ + static const btScalar w=1/(btScalar)3; + appendNote(text,o,btVector4(w,w,w,0), feature->m_n[0], + feature->m_n[1], + feature->m_n[2]); +} + +// +void btSoftBody::appendNode( const btVector3& x,btScalar m) +{ + if(m_nodes.capacity()==m_nodes.size()) + { + pointersToIndices(); + m_nodes.reserve(m_nodes.size()*2+1); + indicesToPointers(); + } + const btScalar margin=getCollisionShape()->getMargin(); + m_nodes.push_back(Node()); + Node& n=m_nodes[m_nodes.size()-1]; + ZeroInitialize(n); + n.m_x = x; + n.m_q = n.m_x; + n.m_im = m>0?1/m:0; + n.m_material = m_materials[0]; + n.m_leaf = m_ndbvt.insert(btDbvtVolume::FromCR(n.m_x,margin),&n); +} + +// +void btSoftBody::appendLink(int model,Material* mat) +{ + Link l; + if(model>=0) + l=m_links[model]; + else + { ZeroInitialize(l);l.m_material=mat?mat:m_materials[0]; } + m_links.push_back(l); +} + +// +void btSoftBody::appendLink( int node0, + int node1, + Material* mat, + bool bcheckexist) +{ + appendLink(&m_nodes[node0],&m_nodes[node1],mat,bcheckexist); +} + +// +void btSoftBody::appendLink( Node* node0, + Node* node1, + Material* mat, + bool bcheckexist) +{ + if((!bcheckexist)||(!checkLink(node0,node1))) + { + appendLink(-1,mat); + Link& l=m_links[m_links.size()-1]; + l.m_n[0] = node0; + l.m_n[1] = node1; + l.m_rl = (l.m_n[0]->m_x-l.m_n[1]->m_x).length(); + m_bUpdateRtCst=true; + } +} + +// +void btSoftBody::appendFace(int model,Material* mat) +{ + Face f; + if(model>=0) + { f=m_faces[model]; } + else + { ZeroInitialize(f);f.m_material=mat?mat:m_materials[0]; } + m_faces.push_back(f); +} + +// +void btSoftBody::appendFace(int node0,int node1,int node2,Material* mat) +{ + if (node0==node1) + return; + if (node1==node2) + return; + if (node2==node0) + return; + + appendFace(-1,mat); + Face& f=m_faces[m_faces.size()-1]; + btAssert(node0!=node1); + btAssert(node1!=node2); + btAssert(node2!=node0); + f.m_n[0] = &m_nodes[node0]; + f.m_n[1] = &m_nodes[node1]; + f.m_n[2] = &m_nodes[node2]; + f.m_ra = AreaOf( f.m_n[0]->m_x, + f.m_n[1]->m_x, + f.m_n[2]->m_x); + m_bUpdateRtCst=true; +} + +// +void btSoftBody::appendTetra(int model,Material* mat) +{ +Tetra t; +if(model>=0) + t=m_tetras[model]; + else + { ZeroInitialize(t);t.m_material=mat?mat:m_materials[0]; } +m_tetras.push_back(t); +} + +// +void btSoftBody::appendTetra(int node0, + int node1, + int node2, + int node3, + Material* mat) +{ + appendTetra(-1,mat); + Tetra& t=m_tetras[m_tetras.size()-1]; + t.m_n[0] = &m_nodes[node0]; + t.m_n[1] = &m_nodes[node1]; + t.m_n[2] = &m_nodes[node2]; + t.m_n[3] = &m_nodes[node3]; + t.m_rv = VolumeOf(t.m_n[0]->m_x,t.m_n[1]->m_x,t.m_n[2]->m_x,t.m_n[3]->m_x); + m_bUpdateRtCst=true; +} + +// + +void btSoftBody::appendAnchor(int node,btRigidBody* body, bool disableCollisionBetweenLinkedBodies,btScalar influence) +{ + btVector3 local = body->getWorldTransform().inverse()*m_nodes[node].m_x; + appendAnchor(node,body,local,disableCollisionBetweenLinkedBodies,influence); +} + +// +void btSoftBody::appendAnchor(int node,btRigidBody* body, const btVector3& localPivot,bool disableCollisionBetweenLinkedBodies,btScalar influence) +{ + if (disableCollisionBetweenLinkedBodies) + { + if (m_collisionDisabledObjects.findLinearSearch(body)==m_collisionDisabledObjects.size()) + { + m_collisionDisabledObjects.push_back(body); + } + } + + Anchor a; + a.m_node = &m_nodes[node]; + a.m_body = body; + a.m_local = localPivot; + a.m_node->m_battach = 1; + a.m_influence = influence; + m_anchors.push_back(a); +} + +// +void btSoftBody::appendLinearJoint(const LJoint::Specs& specs,Cluster* body0,Body body1) +{ + LJoint* pj = new(btAlignedAlloc(sizeof(LJoint),16)) LJoint(); + pj->m_bodies[0] = body0; + pj->m_bodies[1] = body1; + pj->m_refs[0] = pj->m_bodies[0].xform().inverse()*specs.position; + pj->m_refs[1] = pj->m_bodies[1].xform().inverse()*specs.position; + pj->m_cfm = specs.cfm; + pj->m_erp = specs.erp; + pj->m_split = specs.split; + m_joints.push_back(pj); +} + +// +void btSoftBody::appendLinearJoint(const LJoint::Specs& specs,Body body) +{ + appendLinearJoint(specs,m_clusters[0],body); +} + +// +void btSoftBody::appendLinearJoint(const LJoint::Specs& specs,btSoftBody* body) +{ + appendLinearJoint(specs,m_clusters[0],body->m_clusters[0]); +} + +// +void btSoftBody::appendAngularJoint(const AJoint::Specs& specs,Cluster* body0,Body body1) +{ + AJoint* pj = new(btAlignedAlloc(sizeof(AJoint),16)) AJoint(); + pj->m_bodies[0] = body0; + pj->m_bodies[1] = body1; + pj->m_refs[0] = pj->m_bodies[0].xform().inverse().getBasis()*specs.axis; + pj->m_refs[1] = pj->m_bodies[1].xform().inverse().getBasis()*specs.axis; + pj->m_cfm = specs.cfm; + pj->m_erp = specs.erp; + pj->m_split = specs.split; + pj->m_icontrol = specs.icontrol; + m_joints.push_back(pj); +} + +// +void btSoftBody::appendAngularJoint(const AJoint::Specs& specs,Body body) +{ + appendAngularJoint(specs,m_clusters[0],body); +} + +// +void btSoftBody::appendAngularJoint(const AJoint::Specs& specs,btSoftBody* body) +{ + appendAngularJoint(specs,m_clusters[0],body->m_clusters[0]); +} + +// +void btSoftBody::addForce(const btVector3& force) +{ + for(int i=0,ni=m_nodes.size();i<ni;++i) addForce(force,i); +} + +// +void btSoftBody::addForce(const btVector3& force,int node) +{ + Node& n=m_nodes[node]; + if(n.m_im>0) + { + n.m_f += force; + } +} + +void btSoftBody::addAeroForceToNode(const btVector3& windVelocity,int nodeIndex) +{ + btAssert(nodeIndex >= 0 && nodeIndex < m_nodes.size()); + + const btScalar dt = m_sst.sdt; + const btScalar kLF = m_cfg.kLF; + const btScalar kDG = m_cfg.kDG; + //const btScalar kPR = m_cfg.kPR; + //const btScalar kVC = m_cfg.kVC; + const bool as_lift = kLF>0; + const bool as_drag = kDG>0; + const bool as_aero = as_lift || as_drag; + const bool as_vaero = as_aero && (m_cfg.aeromodel < btSoftBody::eAeroModel::F_TwoSided); + + Node& n = m_nodes[nodeIndex]; + + if( n.m_im>0 ) + { + btSoftBody::sMedium medium; + + EvaluateMedium(m_worldInfo, n.m_x, medium); + medium.m_velocity = windVelocity; + medium.m_density = m_worldInfo->air_density; + + /* Aerodynamics */ + if(as_vaero) + { + const btVector3 rel_v = n.m_v - medium.m_velocity; + const btScalar rel_v_len = rel_v.length(); + const btScalar rel_v2 = rel_v.length2(); + + if(rel_v2>SIMD_EPSILON) + { + const btVector3 rel_v_nrm = rel_v.normalized(); + btVector3 nrm = n.m_n; + + if (m_cfg.aeromodel == btSoftBody::eAeroModel::V_TwoSidedLiftDrag) + { + nrm *= (btScalar)( (btDot(nrm,rel_v) < 0) ? -1 : +1); + btVector3 fDrag(0, 0, 0); + btVector3 fLift(0, 0, 0); + + btScalar n_dot_v = nrm.dot(rel_v_nrm); + btScalar tri_area = 0.5f * n.m_area; + + 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 + 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)); + + // Check if the velocity change resulted by aero drag force exceeds the current velocity of the node. + btVector3 del_v_by_fDrag = fDrag*n.m_im*m_sst.sdt; + btScalar del_v_by_fDrag_len2 = del_v_by_fDrag.length2(); + btScalar v_len2 = n.m_v.length2(); + + if (del_v_by_fDrag_len2 >= v_len2 && del_v_by_fDrag_len2 > 0) + { + btScalar del_v_by_fDrag_len = del_v_by_fDrag.length(); + btScalar v_len = n.m_v.length(); + fDrag *= btScalar(0.8)*(v_len / del_v_by_fDrag_len); + } + + n.m_f += fDrag; + n.m_f += fLift; + } + else if (m_cfg.aeromodel == btSoftBody::eAeroModel::V_Point || m_cfg.aeromodel == btSoftBody::eAeroModel::V_OneSided || m_cfg.aeromodel == btSoftBody::eAeroModel::V_TwoSided) + { + if (m_cfg.aeromodel == btSoftBody::eAeroModel::V_TwoSided) + nrm *= (btScalar)( (btDot(nrm,rel_v) < 0) ? -1 : +1); + + const btScalar dvn = btDot(rel_v,nrm); + /* Compute forces */ + if(dvn>0) + { + btVector3 force(0,0,0); + const btScalar c0 = n.m_area * dvn * rel_v2/2; + const btScalar c1 = c0 * medium.m_density; + force += nrm*(-c1*kLF); + force += rel_v.normalized() * (-c1 * kDG); + ApplyClampedForce(n, force, dt); + } + } + } + } + } +} + +void btSoftBody::addAeroForceToFace(const btVector3& windVelocity,int faceIndex) +{ + const btScalar dt = m_sst.sdt; + const btScalar kLF = m_cfg.kLF; + const btScalar kDG = m_cfg.kDG; +// const btScalar kPR = m_cfg.kPR; +// const btScalar kVC = m_cfg.kVC; + const bool as_lift = kLF>0; + const bool as_drag = kDG>0; + const bool as_aero = as_lift || as_drag; + const bool as_faero = as_aero && (m_cfg.aeromodel >= btSoftBody::eAeroModel::F_TwoSided); + + if(as_faero) + { + btSoftBody::Face& f=m_faces[faceIndex]; + + btSoftBody::sMedium medium; + + const btVector3 v=(f.m_n[0]->m_v+f.m_n[1]->m_v+f.m_n[2]->m_v)/3; + const btVector3 x=(f.m_n[0]->m_x+f.m_n[1]->m_x+f.m_n[2]->m_x)/3; + EvaluateMedium(m_worldInfo,x,medium); + medium.m_velocity = windVelocity; + medium.m_density = m_worldInfo->air_density; + const btVector3 rel_v=v-medium.m_velocity; + const btScalar rel_v_len = rel_v.length(); + const btScalar rel_v2=rel_v.length2(); + + if(rel_v2>SIMD_EPSILON) + { + const btVector3 rel_v_nrm = rel_v.normalized(); + btVector3 nrm = f.m_normal; + + if (m_cfg.aeromodel == btSoftBody::eAeroModel::F_TwoSidedLiftDrag) + { + nrm *= (btScalar)( (btDot(nrm,rel_v) < 0) ? -1 : +1); + + btVector3 fDrag(0, 0, 0); + btVector3 fLift(0, 0, 0); + + btScalar n_dot_v = nrm.dot(rel_v_nrm); + btScalar tri_area = 0.5f * f.m_ra; + + 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 + 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)); + + fDrag /= 3; + fLift /= 3; + + for(int j=0;j<3;++j) + { + if (f.m_n[j]->m_im>0) + { + // Check if the velocity change resulted by aero drag force exceeds the current velocity of the node. + btVector3 del_v_by_fDrag = fDrag*f.m_n[j]->m_im*m_sst.sdt; + btScalar del_v_by_fDrag_len2 = del_v_by_fDrag.length2(); + btScalar v_len2 = f.m_n[j]->m_v.length2(); + + if (del_v_by_fDrag_len2 >= v_len2 && del_v_by_fDrag_len2 > 0) + { + btScalar del_v_by_fDrag_len = del_v_by_fDrag.length(); + btScalar v_len = f.m_n[j]->m_v.length(); + fDrag *= btScalar(0.8)*(v_len / del_v_by_fDrag_len); + } + + f.m_n[j]->m_f += fDrag; + f.m_n[j]->m_f += fLift; + } + } + } + else if (m_cfg.aeromodel == btSoftBody::eAeroModel::F_OneSided || m_cfg.aeromodel == btSoftBody::eAeroModel::F_TwoSided) + { + if (m_cfg.aeromodel == btSoftBody::eAeroModel::F_TwoSided) + nrm *= (btScalar)( (btDot(nrm,rel_v) < 0) ? -1 : +1); + + const btScalar dvn=btDot(rel_v,nrm); + /* Compute forces */ + if(dvn>0) + { + btVector3 force(0,0,0); + const btScalar c0 = f.m_ra*dvn*rel_v2; + const btScalar c1 = c0*medium.m_density; + force += nrm*(-c1*kLF); + force += rel_v.normalized()*(-c1*kDG); + force /= 3; + for(int j=0;j<3;++j) ApplyClampedForce(*f.m_n[j],force,dt); + } + } + } + } + +} + +// +void btSoftBody::addVelocity(const btVector3& velocity) +{ + for(int i=0,ni=m_nodes.size();i<ni;++i) addVelocity(velocity,i); +} + +/* Set velocity for the entire body */ +void btSoftBody::setVelocity( const btVector3& velocity) +{ + for(int i=0,ni=m_nodes.size();i<ni;++i) + { + Node& n=m_nodes[i]; + if(n.m_im>0) + { + n.m_v = velocity; + } + } +} + + +// +void btSoftBody::addVelocity(const btVector3& velocity,int node) +{ + Node& n=m_nodes[node]; + if(n.m_im>0) + { + n.m_v += velocity; + } +} + +// +void btSoftBody::setMass(int node,btScalar mass) +{ + m_nodes[node].m_im=mass>0?1/mass:0; + m_bUpdateRtCst=true; +} + +// +btScalar btSoftBody::getMass(int node) const +{ + return(m_nodes[node].m_im>0?1/m_nodes[node].m_im:0); +} + +// +btScalar btSoftBody::getTotalMass() const +{ + btScalar mass=0; + for(int i=0;i<m_nodes.size();++i) + { + mass+=getMass(i); + } + return(mass); +} + +// +void btSoftBody::setTotalMass(btScalar mass,bool fromfaces) +{ + int i; + + if(fromfaces) + { + + for(i=0;i<m_nodes.size();++i) + { + m_nodes[i].m_im=0; + } + for(i=0;i<m_faces.size();++i) + { + const Face& f=m_faces[i]; + const btScalar twicearea=AreaOf( f.m_n[0]->m_x, + f.m_n[1]->m_x, + f.m_n[2]->m_x); + for(int j=0;j<3;++j) + { + f.m_n[j]->m_im+=twicearea; + } + } + for( i=0;i<m_nodes.size();++i) + { + m_nodes[i].m_im=1/m_nodes[i].m_im; + } + } + const btScalar tm=getTotalMass(); + const btScalar itm=1/tm; + for( i=0;i<m_nodes.size();++i) + { + m_nodes[i].m_im/=itm*mass; + } + m_bUpdateRtCst=true; +} + +// +void btSoftBody::setTotalDensity(btScalar density) +{ + setTotalMass(getVolume()*density,true); +} + +// +void btSoftBody::setVolumeMass(btScalar mass) +{ +btAlignedObjectArray<btScalar> ranks; +ranks.resize(m_nodes.size(),0); +int i; + +for(i=0;i<m_nodes.size();++i) + { + m_nodes[i].m_im=0; + } +for(i=0;i<m_tetras.size();++i) + { + const Tetra& t=m_tetras[i]; + for(int j=0;j<4;++j) + { + t.m_n[j]->m_im+=btFabs(t.m_rv); + ranks[int(t.m_n[j]-&m_nodes[0])]+=1; + } + } +for( i=0;i<m_nodes.size();++i) + { + if(m_nodes[i].m_im>0) + { + m_nodes[i].m_im=ranks[i]/m_nodes[i].m_im; + } + } +setTotalMass(mass,false); +} + +// +void btSoftBody::setVolumeDensity(btScalar density) +{ +btScalar volume=0; +for(int i=0;i<m_tetras.size();++i) + { + const Tetra& t=m_tetras[i]; + for(int j=0;j<4;++j) + { + volume+=btFabs(t.m_rv); + } + } +setVolumeMass(volume*density/6); +} + +// +void btSoftBody::transform(const btTransform& trs) +{ + const btScalar margin=getCollisionShape()->getMargin(); + ATTRIBUTE_ALIGNED16(btDbvtVolume) vol; + + for(int i=0,ni=m_nodes.size();i<ni;++i) + { + Node& n=m_nodes[i]; + n.m_x=trs*n.m_x; + n.m_q=trs*n.m_q; + n.m_n=trs.getBasis()*n.m_n; + vol = btDbvtVolume::FromCR(n.m_x,margin); + + m_ndbvt.update(n.m_leaf,vol); + } + updateNormals(); + updateBounds(); + updateConstants(); + m_initialWorldTransform = trs; +} + +// +void btSoftBody::translate(const btVector3& trs) +{ + btTransform t; + t.setIdentity(); + t.setOrigin(trs); + transform(t); +} + +// +void btSoftBody::rotate( const btQuaternion& rot) +{ + btTransform t; + t.setIdentity(); + t.setRotation(rot); + transform(t); +} + +// +void btSoftBody::scale(const btVector3& scl) +{ + + const btScalar margin=getCollisionShape()->getMargin(); + ATTRIBUTE_ALIGNED16(btDbvtVolume) vol; + + for(int i=0,ni=m_nodes.size();i<ni;++i) + { + Node& n=m_nodes[i]; + n.m_x*=scl; + n.m_q*=scl; + vol = btDbvtVolume::FromCR(n.m_x,margin); + m_ndbvt.update(n.m_leaf,vol); + } + updateNormals(); + updateBounds(); + updateConstants(); +} + +// +btScalar btSoftBody::getRestLengthScale() +{ + return m_restLengthScale; +} + +// +void btSoftBody::setRestLengthScale(btScalar restLengthScale) +{ + for(int i=0, ni=m_links.size(); i<ni; ++i) + { + Link& l=m_links[i]; + l.m_rl = l.m_rl / m_restLengthScale * restLengthScale; + l.m_c1 = l.m_rl*l.m_rl; + } + m_restLengthScale = restLengthScale; + + if (getActivationState() == ISLAND_SLEEPING) + activate(); +} + +// +void btSoftBody::setPose(bool bvolume,bool bframe) +{ + m_pose.m_bvolume = bvolume; + m_pose.m_bframe = bframe; + int i,ni; + + /* Weights */ + const btScalar omass=getTotalMass(); + const btScalar kmass=omass*m_nodes.size()*1000; + btScalar tmass=omass; + m_pose.m_wgh.resize(m_nodes.size()); + for(i=0,ni=m_nodes.size();i<ni;++i) + { + if(m_nodes[i].m_im<=0) tmass+=kmass; + } + for( i=0,ni=m_nodes.size();i<ni;++i) + { + Node& n=m_nodes[i]; + m_pose.m_wgh[i]= n.m_im>0 ? + 1/(m_nodes[i].m_im*tmass) : + kmass/tmass; + } + /* Pos */ + const btVector3 com=evaluateCom(); + m_pose.m_pos.resize(m_nodes.size()); + for( i=0,ni=m_nodes.size();i<ni;++i) + { + m_pose.m_pos[i]=m_nodes[i].m_x-com; + } + m_pose.m_volume = bvolume?getVolume():0; + m_pose.m_com = com; + m_pose.m_rot.setIdentity(); + m_pose.m_scl.setIdentity(); + /* Aqq */ + m_pose.m_aqq[0] = + m_pose.m_aqq[1] = + m_pose.m_aqq[2] = btVector3(0,0,0); + for( i=0,ni=m_nodes.size();i<ni;++i) + { + const btVector3& q=m_pose.m_pos[i]; + const btVector3 mq=m_pose.m_wgh[i]*q; + m_pose.m_aqq[0]+=mq.x()*q; + m_pose.m_aqq[1]+=mq.y()*q; + m_pose.m_aqq[2]+=mq.z()*q; + } + m_pose.m_aqq=m_pose.m_aqq.inverse(); + + updateConstants(); +} + +void btSoftBody::resetLinkRestLengths() +{ + for(int i=0, ni=m_links.size();i<ni;++i) + { + Link& l = m_links[i]; + l.m_rl = (l.m_n[0]->m_x-l.m_n[1]->m_x).length(); + l.m_c1 = l.m_rl*l.m_rl; + } +} + +// +btScalar btSoftBody::getVolume() const +{ + btScalar vol=0; + if(m_nodes.size()>0) + { + int i,ni; + + const btVector3 org=m_nodes[0].m_x; + for(i=0,ni=m_faces.size();i<ni;++i) + { + const Face& f=m_faces[i]; + vol+=btDot(f.m_n[0]->m_x-org,btCross(f.m_n[1]->m_x-org,f.m_n[2]->m_x-org)); + } + vol/=(btScalar)6; + } + return(vol); +} + +// +int btSoftBody::clusterCount() const +{ + return(m_clusters.size()); +} + +// +btVector3 btSoftBody::clusterCom(const Cluster* cluster) +{ + btVector3 com(0,0,0); + for(int i=0,ni=cluster->m_nodes.size();i<ni;++i) + { + com+=cluster->m_nodes[i]->m_x*cluster->m_masses[i]; + } + return(com*cluster->m_imass); +} + +// +btVector3 btSoftBody::clusterCom(int cluster) const +{ + return(clusterCom(m_clusters[cluster])); +} + +// +btVector3 btSoftBody::clusterVelocity(const Cluster* cluster,const btVector3& rpos) +{ + return(cluster->m_lv+btCross(cluster->m_av,rpos)); +} + +// +void btSoftBody::clusterVImpulse(Cluster* cluster,const btVector3& rpos,const btVector3& impulse) +{ + const btVector3 li=cluster->m_imass*impulse; + const btVector3 ai=cluster->m_invwi*btCross(rpos,impulse); + cluster->m_vimpulses[0]+=li;cluster->m_lv+=li; + cluster->m_vimpulses[1]+=ai;cluster->m_av+=ai; + cluster->m_nvimpulses++; +} + +// +void btSoftBody::clusterDImpulse(Cluster* cluster,const btVector3& rpos,const btVector3& impulse) +{ + const btVector3 li=cluster->m_imass*impulse; + const btVector3 ai=cluster->m_invwi*btCross(rpos,impulse); + cluster->m_dimpulses[0]+=li; + cluster->m_dimpulses[1]+=ai; + cluster->m_ndimpulses++; +} + +// +void btSoftBody::clusterImpulse(Cluster* cluster,const btVector3& rpos,const Impulse& impulse) +{ + if(impulse.m_asVelocity) clusterVImpulse(cluster,rpos,impulse.m_velocity); + if(impulse.m_asDrift) clusterDImpulse(cluster,rpos,impulse.m_drift); +} + +// +void btSoftBody::clusterVAImpulse(Cluster* cluster,const btVector3& impulse) +{ + const btVector3 ai=cluster->m_invwi*impulse; + cluster->m_vimpulses[1]+=ai;cluster->m_av+=ai; + cluster->m_nvimpulses++; +} + +// +void btSoftBody::clusterDAImpulse(Cluster* cluster,const btVector3& impulse) +{ + const btVector3 ai=cluster->m_invwi*impulse; + cluster->m_dimpulses[1]+=ai; + cluster->m_ndimpulses++; +} + +// +void btSoftBody::clusterAImpulse(Cluster* cluster,const Impulse& impulse) +{ + if(impulse.m_asVelocity) clusterVAImpulse(cluster,impulse.m_velocity); + if(impulse.m_asDrift) clusterDAImpulse(cluster,impulse.m_drift); +} + +// +void btSoftBody::clusterDCImpulse(Cluster* cluster,const btVector3& impulse) +{ + cluster->m_dimpulses[0]+=impulse*cluster->m_imass; + cluster->m_ndimpulses++; +} + +struct NodeLinks +{ + btAlignedObjectArray<int> m_links; +}; + + + +// +int btSoftBody::generateBendingConstraints(int distance,Material* mat) +{ + int i,j; + + if(distance>1) + { + /* Build graph */ + const int n=m_nodes.size(); + const unsigned inf=(~(unsigned)0)>>1; + unsigned* adj=new unsigned[n*n]; + + +#define IDX(_x_,_y_) ((_y_)*n+(_x_)) + for(j=0;j<n;++j) + { + for(i=0;i<n;++i) + { + if(i!=j) + { + adj[IDX(i,j)]=adj[IDX(j,i)]=inf; + } + else + { + adj[IDX(i,j)]=adj[IDX(j,i)]=0; + } + } + } + for( i=0;i<m_links.size();++i) + { + const int ia=(int)(m_links[i].m_n[0]-&m_nodes[0]); + const int ib=(int)(m_links[i].m_n[1]-&m_nodes[0]); + adj[IDX(ia,ib)]=1; + adj[IDX(ib,ia)]=1; + } + + + //special optimized case for distance == 2 + if (distance == 2) + { + + btAlignedObjectArray<NodeLinks> nodeLinks; + + + /* Build node links */ + nodeLinks.resize(m_nodes.size()); + + for( i=0;i<m_links.size();++i) + { + const int ia=(int)(m_links[i].m_n[0]-&m_nodes[0]); + const int ib=(int)(m_links[i].m_n[1]-&m_nodes[0]); + if (nodeLinks[ia].m_links.findLinearSearch(ib)==nodeLinks[ia].m_links.size()) + nodeLinks[ia].m_links.push_back(ib); + + if (nodeLinks[ib].m_links.findLinearSearch(ia)==nodeLinks[ib].m_links.size()) + nodeLinks[ib].m_links.push_back(ia); + } + for (int ii=0;ii<nodeLinks.size();ii++) + { + int i=ii; + + for (int jj=0;jj<nodeLinks[ii].m_links.size();jj++) + { + int k = nodeLinks[ii].m_links[jj]; + for (int kk=0;kk<nodeLinks[k].m_links.size();kk++) + { + int j = nodeLinks[k].m_links[kk]; + if (i!=j) + { + const unsigned sum=adj[IDX(i,k)]+adj[IDX(k,j)]; + btAssert(sum==2); + if(adj[IDX(i,j)]>sum) + { + adj[IDX(i,j)]=adj[IDX(j,i)]=sum; + } + } + + } + } + } + } else + { + ///generic Floyd's algorithm + for(int k=0;k<n;++k) + { + for(j=0;j<n;++j) + { + for(i=j+1;i<n;++i) + { + const unsigned sum=adj[IDX(i,k)]+adj[IDX(k,j)]; + if(adj[IDX(i,j)]>sum) + { + adj[IDX(i,j)]=adj[IDX(j,i)]=sum; + } + } + } + } + } + + + /* Build links */ + int nlinks=0; + for(j=0;j<n;++j) + { + for(i=j+1;i<n;++i) + { + if(adj[IDX(i,j)]==(unsigned)distance) + { + appendLink(i,j,mat); + m_links[m_links.size()-1].m_bbending=1; + ++nlinks; + } + } + } + delete[] adj; + return(nlinks); + } + return(0); +} + +// +void btSoftBody::randomizeConstraints() +{ + unsigned long seed=243703; +#define NEXTRAND (seed=(1664525L*seed+1013904223L)&0xffffffff) + int i,ni; + + for(i=0,ni=m_links.size();i<ni;++i) + { + btSwap(m_links[i],m_links[NEXTRAND%ni]); + } + for(i=0,ni=m_faces.size();i<ni;++i) + { + btSwap(m_faces[i],m_faces[NEXTRAND%ni]); + } +#undef NEXTRAND +} + +// +void btSoftBody::releaseCluster(int index) +{ + Cluster* c=m_clusters[index]; + if(c->m_leaf) m_cdbvt.remove(c->m_leaf); + c->~Cluster(); + btAlignedFree(c); + m_clusters.remove(c); +} + +// +void btSoftBody::releaseClusters() +{ + while(m_clusters.size()>0) releaseCluster(0); +} + +// +int btSoftBody::generateClusters(int k,int maxiterations) +{ + int i; + releaseClusters(); + m_clusters.resize(btMin(k,m_nodes.size())); + for(i=0;i<m_clusters.size();++i) + { + m_clusters[i] = new(btAlignedAlloc(sizeof(Cluster),16)) Cluster(); + m_clusters[i]->m_collide= true; + } + k=m_clusters.size(); + if(k>0) + { + /* Initialize */ + btAlignedObjectArray<btVector3> centers; + btVector3 cog(0,0,0); + int i; + for(i=0;i<m_nodes.size();++i) + { + cog+=m_nodes[i].m_x; + m_clusters[(i*29873)%m_clusters.size()]->m_nodes.push_back(&m_nodes[i]); + } + cog/=(btScalar)m_nodes.size(); + centers.resize(k,cog); + /* Iterate */ + const btScalar slope=16; + bool changed; + int iterations=0; + do { + const btScalar w=2-btMin<btScalar>(1,iterations/slope); + changed=false; + iterations++; + int i; + + for(i=0;i<k;++i) + { + btVector3 c(0,0,0); + for(int j=0;j<m_clusters[i]->m_nodes.size();++j) + { + c+=m_clusters[i]->m_nodes[j]->m_x; + } + if(m_clusters[i]->m_nodes.size()) + { + c /= (btScalar)m_clusters[i]->m_nodes.size(); + c = centers[i]+(c-centers[i])*w; + changed |= ((c-centers[i]).length2()>SIMD_EPSILON); + centers[i] = c; + m_clusters[i]->m_nodes.resize(0); + } + } + for(i=0;i<m_nodes.size();++i) + { + const btVector3 nx=m_nodes[i].m_x; + int kbest=0; + btScalar kdist=ClusterMetric(centers[0],nx); + for(int j=1;j<k;++j) + { + const btScalar d=ClusterMetric(centers[j],nx); + if(d<kdist) + { + kbest=j; + kdist=d; + } + } + m_clusters[kbest]->m_nodes.push_back(&m_nodes[i]); + } + } while(changed&&(iterations<maxiterations)); + /* Merge */ + btAlignedObjectArray<int> cids; + cids.resize(m_nodes.size(),-1); + for(i=0;i<m_clusters.size();++i) + { + for(int j=0;j<m_clusters[i]->m_nodes.size();++j) + { + cids[int(m_clusters[i]->m_nodes[j]-&m_nodes[0])]=i; + } + } + for(i=0;i<m_faces.size();++i) + { + const int idx[]={ int(m_faces[i].m_n[0]-&m_nodes[0]), + int(m_faces[i].m_n[1]-&m_nodes[0]), + int(m_faces[i].m_n[2]-&m_nodes[0])}; + for(int j=0;j<3;++j) + { + const int cid=cids[idx[j]]; + for(int q=1;q<3;++q) + { + const int kid=idx[(j+q)%3]; + if(cids[kid]!=cid) + { + if(m_clusters[cid]->m_nodes.findLinearSearch(&m_nodes[kid])==m_clusters[cid]->m_nodes.size()) + { + m_clusters[cid]->m_nodes.push_back(&m_nodes[kid]); + } + } + } + } + } + /* Master */ + if(m_clusters.size()>1) + { + Cluster* pmaster=new(btAlignedAlloc(sizeof(Cluster),16)) Cluster(); + pmaster->m_collide = false; + pmaster->m_nodes.reserve(m_nodes.size()); + for(int i=0;i<m_nodes.size();++i) pmaster->m_nodes.push_back(&m_nodes[i]); + m_clusters.push_back(pmaster); + btSwap(m_clusters[0],m_clusters[m_clusters.size()-1]); + } + /* Terminate */ + for(i=0;i<m_clusters.size();++i) + { + if(m_clusters[i]->m_nodes.size()==0) + { + releaseCluster(i--); + } + } + } else + { + //create a cluster for each tetrahedron (if tetrahedra exist) or each face + if (m_tetras.size()) + { + m_clusters.resize(m_tetras.size()); + for(i=0;i<m_clusters.size();++i) + { + m_clusters[i] = new(btAlignedAlloc(sizeof(Cluster),16)) Cluster(); + m_clusters[i]->m_collide= true; + } + for (i=0;i<m_tetras.size();i++) + { + for (int j=0;j<4;j++) + { + m_clusters[i]->m_nodes.push_back(m_tetras[i].m_n[j]); + } + } + + } else + { + m_clusters.resize(m_faces.size()); + for(i=0;i<m_clusters.size();++i) + { + m_clusters[i] = new(btAlignedAlloc(sizeof(Cluster),16)) Cluster(); + m_clusters[i]->m_collide= true; + } + + for(i=0;i<m_faces.size();++i) + { + for(int j=0;j<3;++j) + { + m_clusters[i]->m_nodes.push_back(m_faces[i].m_n[j]); + } + } + } + } + + if (m_clusters.size()) + { + initializeClusters(); + updateClusters(); + + + //for self-collision + m_clusterConnectivity.resize(m_clusters.size()*m_clusters.size()); + { + for (int c0=0;c0<m_clusters.size();c0++) + { + m_clusters[c0]->m_clusterIndex=c0; + for (int c1=0;c1<m_clusters.size();c1++) + { + + bool connected=false; + Cluster* cla = m_clusters[c0]; + Cluster* clb = m_clusters[c1]; + for (int i=0;!connected&&i<cla->m_nodes.size();i++) + { + for (int j=0;j<clb->m_nodes.size();j++) + { + if (cla->m_nodes[i] == clb->m_nodes[j]) + { + connected=true; + break; + } + } + } + m_clusterConnectivity[c0+c1*m_clusters.size()]=connected; + } + } + } + } + + return(m_clusters.size()); +} + +// +void btSoftBody::refine(ImplicitFn* ifn,btScalar accurary,bool cut) +{ + const Node* nbase = &m_nodes[0]; + int ncount = m_nodes.size(); + btSymMatrix<int> edges(ncount,-2); + int newnodes=0; + int i,j,k,ni; + + /* Filter out */ + for(i=0;i<m_links.size();++i) + { + Link& l=m_links[i]; + if(l.m_bbending) + { + if(!SameSign(ifn->Eval(l.m_n[0]->m_x),ifn->Eval(l.m_n[1]->m_x))) + { + btSwap(m_links[i],m_links[m_links.size()-1]); + m_links.pop_back();--i; + } + } + } + /* Fill edges */ + for(i=0;i<m_links.size();++i) + { + Link& l=m_links[i]; + edges(int(l.m_n[0]-nbase),int(l.m_n[1]-nbase))=-1; + } + for(i=0;i<m_faces.size();++i) + { + Face& f=m_faces[i]; + edges(int(f.m_n[0]-nbase),int(f.m_n[1]-nbase))=-1; + edges(int(f.m_n[1]-nbase),int(f.m_n[2]-nbase))=-1; + edges(int(f.m_n[2]-nbase),int(f.m_n[0]-nbase))=-1; + } + /* Intersect */ + for(i=0;i<ncount;++i) + { + for(j=i+1;j<ncount;++j) + { + if(edges(i,j)==-1) + { + Node& a=m_nodes[i]; + Node& b=m_nodes[j]; + const btScalar t=ImplicitSolve(ifn,a.m_x,b.m_x,accurary); + if(t>0) + { + const btVector3 x=Lerp(a.m_x,b.m_x,t); + const btVector3 v=Lerp(a.m_v,b.m_v,t); + btScalar m=0; + if(a.m_im>0) + { + if(b.m_im>0) + { + const btScalar ma=1/a.m_im; + const btScalar mb=1/b.m_im; + const btScalar mc=Lerp(ma,mb,t); + const btScalar f=(ma+mb)/(ma+mb+mc); + a.m_im=1/(ma*f); + b.m_im=1/(mb*f); + m=mc*f; + } + else + { a.m_im/=0.5f;m=1/a.m_im; } + } + else + { + if(b.m_im>0) + { b.m_im/=0.5f;m=1/b.m_im; } + else + m=0; + } + appendNode(x,m); + edges(i,j)=m_nodes.size()-1; + m_nodes[edges(i,j)].m_v=v; + ++newnodes; + } + } + } + } + nbase=&m_nodes[0]; + /* Refine links */ + for(i=0,ni=m_links.size();i<ni;++i) + { + Link& feat=m_links[i]; + const int idx[]={ int(feat.m_n[0]-nbase), + int(feat.m_n[1]-nbase)}; + if((idx[0]<ncount)&&(idx[1]<ncount)) + { + const int ni=edges(idx[0],idx[1]); + if(ni>0) + { + appendLink(i); + Link* pft[]={ &m_links[i], + &m_links[m_links.size()-1]}; + pft[0]->m_n[0]=&m_nodes[idx[0]]; + pft[0]->m_n[1]=&m_nodes[ni]; + pft[1]->m_n[0]=&m_nodes[ni]; + pft[1]->m_n[1]=&m_nodes[idx[1]]; + } + } + } + /* Refine faces */ + for(i=0;i<m_faces.size();++i) + { + const Face& feat=m_faces[i]; + const int idx[]={ int(feat.m_n[0]-nbase), + int(feat.m_n[1]-nbase), + int(feat.m_n[2]-nbase)}; + for(j=2,k=0;k<3;j=k++) + { + if((idx[j]<ncount)&&(idx[k]<ncount)) + { + const int ni=edges(idx[j],idx[k]); + if(ni>0) + { + appendFace(i); + const int l=(k+1)%3; + Face* pft[]={ &m_faces[i], + &m_faces[m_faces.size()-1]}; + pft[0]->m_n[0]=&m_nodes[idx[l]]; + pft[0]->m_n[1]=&m_nodes[idx[j]]; + pft[0]->m_n[2]=&m_nodes[ni]; + pft[1]->m_n[0]=&m_nodes[ni]; + pft[1]->m_n[1]=&m_nodes[idx[k]]; + pft[1]->m_n[2]=&m_nodes[idx[l]]; + appendLink(ni,idx[l],pft[0]->m_material); + --i;break; + } + } + } + } + /* Cut */ + if(cut) + { + btAlignedObjectArray<int> cnodes; + const int pcount=ncount; + int i; + ncount=m_nodes.size(); + cnodes.resize(ncount,0); + /* Nodes */ + for(i=0;i<ncount;++i) + { + const btVector3 x=m_nodes[i].m_x; + if((i>=pcount)||(btFabs(ifn->Eval(x))<accurary)) + { + const btVector3 v=m_nodes[i].m_v; + btScalar m=getMass(i); + if(m>0) { m*=0.5f;m_nodes[i].m_im/=0.5f; } + appendNode(x,m); + cnodes[i]=m_nodes.size()-1; + m_nodes[cnodes[i]].m_v=v; + } + } + nbase=&m_nodes[0]; + /* Links */ + for(i=0,ni=m_links.size();i<ni;++i) + { + const int id[]={ int(m_links[i].m_n[0]-nbase), + int(m_links[i].m_n[1]-nbase)}; + int todetach=0; + if(cnodes[id[0]]&&cnodes[id[1]]) + { + appendLink(i); + todetach=m_links.size()-1; + } + else + { + if(( (ifn->Eval(m_nodes[id[0]].m_x)<accurary)&& + (ifn->Eval(m_nodes[id[1]].m_x)<accurary))) + todetach=i; + } + if(todetach) + { + Link& l=m_links[todetach]; + for(int j=0;j<2;++j) + { + int cn=cnodes[int(l.m_n[j]-nbase)]; + if(cn) l.m_n[j]=&m_nodes[cn]; + } + } + } + /* Faces */ + for(i=0,ni=m_faces.size();i<ni;++i) + { + Node** n= m_faces[i].m_n; + if( (ifn->Eval(n[0]->m_x)<accurary)&& + (ifn->Eval(n[1]->m_x)<accurary)&& + (ifn->Eval(n[2]->m_x)<accurary)) + { + for(int j=0;j<3;++j) + { + int cn=cnodes[int(n[j]-nbase)]; + if(cn) n[j]=&m_nodes[cn]; + } + } + } + /* Clean orphans */ + int nnodes=m_nodes.size(); + btAlignedObjectArray<int> ranks; + btAlignedObjectArray<int> todelete; + ranks.resize(nnodes,0); + for(i=0,ni=m_links.size();i<ni;++i) + { + for(int j=0;j<2;++j) ranks[int(m_links[i].m_n[j]-nbase)]++; + } + for(i=0,ni=m_faces.size();i<ni;++i) + { + for(int j=0;j<3;++j) ranks[int(m_faces[i].m_n[j]-nbase)]++; + } + for(i=0;i<m_links.size();++i) + { + const int id[]={ int(m_links[i].m_n[0]-nbase), + int(m_links[i].m_n[1]-nbase)}; + const bool sg[]={ ranks[id[0]]==1, + ranks[id[1]]==1}; + if(sg[0]||sg[1]) + { + --ranks[id[0]]; + --ranks[id[1]]; + btSwap(m_links[i],m_links[m_links.size()-1]); + m_links.pop_back();--i; + } + } +#if 0 + for(i=nnodes-1;i>=0;--i) + { + if(!ranks[i]) todelete.push_back(i); + } + if(todelete.size()) + { + btAlignedObjectArray<int>& map=ranks; + for(int i=0;i<nnodes;++i) map[i]=i; + PointersToIndices(this); + for(int i=0,ni=todelete.size();i<ni;++i) + { + int j=todelete[i]; + int& a=map[j]; + int& b=map[--nnodes]; + m_ndbvt.remove(m_nodes[a].m_leaf);m_nodes[a].m_leaf=0; + btSwap(m_nodes[a],m_nodes[b]); + j=a;a=b;b=j; + } + IndicesToPointers(this,&map[0]); + m_nodes.resize(nnodes); + } +#endif + } + m_bUpdateRtCst=true; +} + +// +bool btSoftBody::cutLink(const Node* node0,const Node* node1,btScalar position) +{ + return(cutLink(int(node0-&m_nodes[0]),int(node1-&m_nodes[0]),position)); +} + +// +bool btSoftBody::cutLink(int node0,int node1,btScalar position) +{ + bool done=false; + int i,ni; +// const btVector3 d=m_nodes[node0].m_x-m_nodes[node1].m_x; + const btVector3 x=Lerp(m_nodes[node0].m_x,m_nodes[node1].m_x,position); + const btVector3 v=Lerp(m_nodes[node0].m_v,m_nodes[node1].m_v,position); + const btScalar m=1; + appendNode(x,m); + appendNode(x,m); + Node* pa=&m_nodes[node0]; + Node* pb=&m_nodes[node1]; + Node* pn[2]={ &m_nodes[m_nodes.size()-2], + &m_nodes[m_nodes.size()-1]}; + pn[0]->m_v=v; + pn[1]->m_v=v; + for(i=0,ni=m_links.size();i<ni;++i) + { + const int mtch=MatchEdge(m_links[i].m_n[0],m_links[i].m_n[1],pa,pb); + if(mtch!=-1) + { + appendLink(i); + Link* pft[]={&m_links[i],&m_links[m_links.size()-1]}; + pft[0]->m_n[1]=pn[mtch]; + pft[1]->m_n[0]=pn[1-mtch]; + done=true; + } + } + for(i=0,ni=m_faces.size();i<ni;++i) + { + for(int k=2,l=0;l<3;k=l++) + { + const int mtch=MatchEdge(m_faces[i].m_n[k],m_faces[i].m_n[l],pa,pb); + if(mtch!=-1) + { + appendFace(i); + Face* pft[]={&m_faces[i],&m_faces[m_faces.size()-1]}; + pft[0]->m_n[l]=pn[mtch]; + pft[1]->m_n[k]=pn[1-mtch]; + appendLink(pn[0],pft[0]->m_n[(l+1)%3],pft[0]->m_material,true); + appendLink(pn[1],pft[0]->m_n[(l+1)%3],pft[0]->m_material,true); + } + } + } + if(!done) + { + m_ndbvt.remove(pn[0]->m_leaf); + m_ndbvt.remove(pn[1]->m_leaf); + m_nodes.pop_back(); + m_nodes.pop_back(); + } + return(done); +} + +// +bool btSoftBody::rayTest(const btVector3& rayFrom, + const btVector3& rayTo, + sRayCast& results) +{ + if(m_faces.size()&&m_fdbvt.empty()) + initializeFaceTree(); + + results.body = this; + results.fraction = 1.f; + results.feature = eFeature::None; + results.index = -1; + + return(rayTest(rayFrom,rayTo,results.fraction,results.feature,results.index,false)!=0); +} + +// +void btSoftBody::setSolver(eSolverPresets::_ preset) +{ + m_cfg.m_vsequence.clear(); + m_cfg.m_psequence.clear(); + m_cfg.m_dsequence.clear(); + switch(preset) + { + case eSolverPresets::Positions: + m_cfg.m_psequence.push_back(ePSolver::Anchors); + m_cfg.m_psequence.push_back(ePSolver::RContacts); + m_cfg.m_psequence.push_back(ePSolver::SContacts); + m_cfg.m_psequence.push_back(ePSolver::Linear); + break; + case eSolverPresets::Velocities: + m_cfg.m_vsequence.push_back(eVSolver::Linear); + + m_cfg.m_psequence.push_back(ePSolver::Anchors); + m_cfg.m_psequence.push_back(ePSolver::RContacts); + m_cfg.m_psequence.push_back(ePSolver::SContacts); + + m_cfg.m_dsequence.push_back(ePSolver::Linear); + break; + } +} + +// +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); +} + +// +void btSoftBody::solveConstraints() +{ + + /* Apply clusters */ + applyClusters(false); + /* Prepare links */ + + int i,ni; + + for(i=0,ni=m_links.size();i<ni;++i) + { + Link& l=m_links[i]; + l.m_c3 = l.m_n[1]->m_q-l.m_n[0]->m_q; + l.m_c2 = 1/(l.m_c3.length2()*l.m_c0); + } + /* Prepare anchors */ + for(i=0,ni=m_anchors.size();i<ni;++i) + { + Anchor& a=m_anchors[i]; + const btVector3 ra=a.m_body->getWorldTransform().getBasis()*a.m_local; + a.m_c0 = ImpulseMatrix( m_sst.sdt, + a.m_node->m_im, + a.m_body->getInvMass(), + a.m_body->getInvInertiaTensorWorld(), + ra); + a.m_c1 = ra; + a.m_c2 = m_sst.sdt*a.m_node->m_im; + a.m_body->activate(); + } + /* Solve velocities */ + if(m_cfg.viterations>0) + { + /* Solve */ + for(int isolve=0;isolve<m_cfg.viterations;++isolve) + { + for(int iseq=0;iseq<m_cfg.m_vsequence.size();++iseq) + { + getSolver(m_cfg.m_vsequence[iseq])(this,1); + } + } + /* Update */ + for(i=0,ni=m_nodes.size();i<ni;++i) + { + Node& n=m_nodes[i]; + n.m_x = n.m_q+n.m_v*m_sst.sdt; + } + } + /* Solve positions */ + if(m_cfg.piterations>0) + { + for(int isolve=0;isolve<m_cfg.piterations;++isolve) + { + const btScalar ti=isolve/(btScalar)m_cfg.piterations; + for(int iseq=0;iseq<m_cfg.m_psequence.size();++iseq) + { + getSolver(m_cfg.m_psequence[iseq])(this,1,ti); + } + } + const btScalar vc=m_sst.isdt*(1-m_cfg.kDP); + for(i=0,ni=m_nodes.size();i<ni;++i) + { + Node& n=m_nodes[i]; + n.m_v = (n.m_x-n.m_q)*vc; + n.m_f = btVector3(0,0,0); + } + } + /* Solve drift */ + if(m_cfg.diterations>0) + { + const btScalar vcf=m_cfg.kVCF*m_sst.isdt; + for(i=0,ni=m_nodes.size();i<ni;++i) + { + Node& n=m_nodes[i]; + n.m_q = n.m_x; + } + for(int idrift=0;idrift<m_cfg.diterations;++idrift) + { + for(int iseq=0;iseq<m_cfg.m_dsequence.size();++iseq) + { + getSolver(m_cfg.m_dsequence[iseq])(this,1,0); + } + } + for(int i=0,ni=m_nodes.size();i<ni;++i) + { + Node& n=m_nodes[i]; + n.m_v += (n.m_x-n.m_q)*vcf; + } + } + /* Apply clusters */ + dampClusters(); + applyClusters(true); +} + +// +void btSoftBody::staticSolve(int iterations) +{ + for(int isolve=0;isolve<iterations;++isolve) + { + for(int iseq=0;iseq<m_cfg.m_psequence.size();++iseq) + { + getSolver(m_cfg.m_psequence[iseq])(this,1,0); + } + } +} + +// +void btSoftBody::solveCommonConstraints(btSoftBody** /*bodies*/,int /*count*/,int /*iterations*/) +{ + /// placeholder +} + +// +void btSoftBody::solveClusters(const btAlignedObjectArray<btSoftBody*>& bodies) +{ + const int nb=bodies.size(); + int iterations=0; + int i; + + for(i=0;i<nb;++i) + { + iterations=btMax(iterations,bodies[i]->m_cfg.citerations); + } + for(i=0;i<nb;++i) + { + bodies[i]->prepareClusters(iterations); + } + for(i=0;i<iterations;++i) + { + const btScalar sor=1; + for(int j=0;j<nb;++j) + { + bodies[j]->solveClusters(sor); + } + } + for(i=0;i<nb;++i) + { + bodies[i]->cleanupClusters(); + } +} + +// +void btSoftBody::integrateMotion() +{ + /* Update */ + updateNormals(); +} + +// +btSoftBody::RayFromToCaster::RayFromToCaster(const btVector3& rayFrom,const btVector3& rayTo,btScalar mxt) +{ + m_rayFrom = rayFrom; + m_rayNormalizedDirection = (rayTo-rayFrom); + m_rayTo = rayTo; + m_mint = mxt; + m_face = 0; + m_tests = 0; +} + +// +void btSoftBody::RayFromToCaster::Process(const btDbvtNode* leaf) +{ + btSoftBody::Face& f=*(btSoftBody::Face*)leaf->data; + const btScalar t=rayFromToTriangle( m_rayFrom,m_rayTo,m_rayNormalizedDirection, + f.m_n[0]->m_x, + f.m_n[1]->m_x, + f.m_n[2]->m_x, + m_mint); + if((t>0)&&(t<m_mint)) + { + m_mint=t;m_face=&f; + } + ++m_tests; +} + +// +btScalar btSoftBody::RayFromToCaster::rayFromToTriangle( const btVector3& rayFrom, + const btVector3& rayTo, + const btVector3& rayNormalizedDirection, + const btVector3& a, + const btVector3& b, + const btVector3& c, + btScalar maxt) +{ + static const btScalar ceps=-SIMD_EPSILON*10; + static const btScalar teps=SIMD_EPSILON*10; + + const btVector3 n=btCross(b-a,c-a); + const btScalar d=btDot(a,n); + const btScalar den=btDot(rayNormalizedDirection,n); + if(!btFuzzyZero(den)) + { + const btScalar num=btDot(rayFrom,n)-d; + const btScalar t=-num/den; + if((t>teps)&&(t<maxt)) + { + const btVector3 hit=rayFrom+rayNormalizedDirection*t; + if( (btDot(n,btCross(a-hit,b-hit))>ceps) && + (btDot(n,btCross(b-hit,c-hit))>ceps) && + (btDot(n,btCross(c-hit,a-hit))>ceps)) + { + return(t); + } + } + } + return(-1); +} + +// +void btSoftBody::pointersToIndices() +{ +#define PTR2IDX(_p_,_b_) reinterpret_cast<btSoftBody::Node*>((_p_)-(_b_)) + btSoftBody::Node* base=m_nodes.size() ? &m_nodes[0] : 0; + int i,ni; + + for(i=0,ni=m_nodes.size();i<ni;++i) + { + if(m_nodes[i].m_leaf) + { + m_nodes[i].m_leaf->data=*(void**)&i; + } + } + for(i=0,ni=m_links.size();i<ni;++i) + { + m_links[i].m_n[0]=PTR2IDX(m_links[i].m_n[0],base); + m_links[i].m_n[1]=PTR2IDX(m_links[i].m_n[1],base); + } + for(i=0,ni=m_faces.size();i<ni;++i) + { + m_faces[i].m_n[0]=PTR2IDX(m_faces[i].m_n[0],base); + m_faces[i].m_n[1]=PTR2IDX(m_faces[i].m_n[1],base); + m_faces[i].m_n[2]=PTR2IDX(m_faces[i].m_n[2],base); + if(m_faces[i].m_leaf) + { + m_faces[i].m_leaf->data=*(void**)&i; + } + } + for(i=0,ni=m_anchors.size();i<ni;++i) + { + m_anchors[i].m_node=PTR2IDX(m_anchors[i].m_node,base); + } + for(i=0,ni=m_notes.size();i<ni;++i) + { + for(int j=0;j<m_notes[i].m_rank;++j) + { + m_notes[i].m_nodes[j]=PTR2IDX(m_notes[i].m_nodes[j],base); + } + } +#undef PTR2IDX +} + +// +void btSoftBody::indicesToPointers(const int* map) +{ +#define IDX2PTR(_p_,_b_) map?(&(_b_)[map[(((char*)_p_)-(char*)0)]]): \ + (&(_b_)[(((char*)_p_)-(char*)0)]) + btSoftBody::Node* base=m_nodes.size() ? &m_nodes[0]:0; + int i,ni; + + for(i=0,ni=m_nodes.size();i<ni;++i) + { + if(m_nodes[i].m_leaf) + { + m_nodes[i].m_leaf->data=&m_nodes[i]; + } + } + for(i=0,ni=m_links.size();i<ni;++i) + { + m_links[i].m_n[0]=IDX2PTR(m_links[i].m_n[0],base); + m_links[i].m_n[1]=IDX2PTR(m_links[i].m_n[1],base); + } + for(i=0,ni=m_faces.size();i<ni;++i) + { + m_faces[i].m_n[0]=IDX2PTR(m_faces[i].m_n[0],base); + m_faces[i].m_n[1]=IDX2PTR(m_faces[i].m_n[1],base); + m_faces[i].m_n[2]=IDX2PTR(m_faces[i].m_n[2],base); + if(m_faces[i].m_leaf) + { + m_faces[i].m_leaf->data=&m_faces[i]; + } + } + for(i=0,ni=m_anchors.size();i<ni;++i) + { + m_anchors[i].m_node=IDX2PTR(m_anchors[i].m_node,base); + } + for(i=0,ni=m_notes.size();i<ni;++i) + { + for(int j=0;j<m_notes[i].m_rank;++j) + { + m_notes[i].m_nodes[j]=IDX2PTR(m_notes[i].m_nodes[j],base); + } + } +#undef IDX2PTR +} + +// +int btSoftBody::rayTest(const btVector3& rayFrom,const btVector3& rayTo, + btScalar& mint,eFeature::_& feature,int& index,bool bcountonly) const +{ + int cnt=0; + btVector3 dir = rayTo-rayFrom; + + + if(bcountonly||m_fdbvt.empty()) + {/* Full search */ + + for(int i=0,ni=m_faces.size();i<ni;++i) + { + const btSoftBody::Face& f=m_faces[i]; + + const btScalar t=RayFromToCaster::rayFromToTriangle( rayFrom,rayTo,dir, + f.m_n[0]->m_x, + f.m_n[1]->m_x, + f.m_n[2]->m_x, + mint); + if(t>0) + { + ++cnt; + if(!bcountonly) + { + feature=btSoftBody::eFeature::Face; + index=i; + mint=t; + } + } + } + } + else + {/* Use dbvt */ + RayFromToCaster collider(rayFrom,rayTo,mint); + + btDbvt::rayTest(m_fdbvt.m_root,rayFrom,rayTo,collider); + if(collider.m_face) + { + mint=collider.m_mint; + feature=btSoftBody::eFeature::Face; + index=(int)(collider.m_face-&m_faces[0]); + cnt=1; + } + } + + for (int i=0;i<m_tetras.size();i++) + { + const btSoftBody::Tetra& tet = m_tetras[i]; + int tetfaces[4][3] = {{0,1,2},{0,1,3},{1,2,3},{0,2,3}}; + for (int f=0;f<4;f++) + { + + int index0=tetfaces[f][0]; + int index1=tetfaces[f][1]; + int index2=tetfaces[f][2]; + btVector3 v0=tet.m_n[index0]->m_x; + btVector3 v1=tet.m_n[index1]->m_x; + btVector3 v2=tet.m_n[index2]->m_x; + + + const btScalar t=RayFromToCaster::rayFromToTriangle( rayFrom,rayTo,dir, + v0,v1,v2, + mint); + if(t>0) + { + ++cnt; + if(!bcountonly) + { + feature=btSoftBody::eFeature::Tetra; + index=i; + mint=t; + } + } + } + } + return(cnt); +} + +// +void btSoftBody::initializeFaceTree() +{ + m_fdbvt.clear(); + for(int i=0;i<m_faces.size();++i) + { + Face& f=m_faces[i]; + f.m_leaf=m_fdbvt.insert(VolumeOf(f,0),&f); + } +} + +// +btVector3 btSoftBody::evaluateCom() const +{ + btVector3 com(0,0,0); + if(m_pose.m_bframe) + { + for(int i=0,ni=m_nodes.size();i<ni;++i) + { + com+=m_nodes[i].m_x*m_pose.m_wgh[i]; + } + } + return(com); +} + +// +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); +} + +// +void btSoftBody::updateNormals() +{ + + const btVector3 zv(0,0,0); + int i,ni; + + for(i=0,ni=m_nodes.size();i<ni;++i) + { + m_nodes[i].m_n=zv; + } + for(i=0,ni=m_faces.size();i<ni;++i) + { + btSoftBody::Face& f=m_faces[i]; + const 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); + f.m_normal=n.normalized(); + f.m_n[0]->m_n+=n; + f.m_n[1]->m_n+=n; + f.m_n[2]->m_n+=n; + } + for(i=0,ni=m_nodes.size();i<ni;++i) + { + btScalar len = m_nodes[i].m_n.length(); + if (len>SIMD_EPSILON) + m_nodes[i].m_n /= len; + } +} + +// +void btSoftBody::updateBounds() +{ + /*if( m_acceleratedSoftBody ) + { + // If we have an accelerated softbody we need to obtain the bounds correctly + // For now (slightly hackily) just have a very large AABB + // TODO: Write get bounds kernel + // If that is updating in place, atomic collisions might be low (when the cloth isn't perfectly aligned to an axis) and we could + // probably do a test and exchange reasonably efficiently. + + m_bounds[0] = btVector3(-1000, -1000, -1000); + 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); + } + //} +} + + +// +void btSoftBody::updatePose() +{ + if(m_pose.m_bframe) + { + btSoftBody::Pose& pose=m_pose; + const btVector3 com=evaluateCom(); + /* Com */ + pose.m_com = com; + /* Rotation */ + btMatrix3x3 Apq; + const btScalar eps=SIMD_EPSILON; + Apq[0]=Apq[1]=Apq[2]=btVector3(0,0,0); + Apq[0].setX(eps);Apq[1].setY(eps*2);Apq[2].setZ(eps*3); + for(int i=0,ni=m_nodes.size();i<ni;++i) + { + const btVector3 a=pose.m_wgh[i]*(m_nodes[i].m_x-com); + const btVector3& b=pose.m_pos[i]; + Apq[0]+=a.x()*b; + Apq[1]+=a.y()*b; + Apq[2]+=a.z()*b; + } + btMatrix3x3 r,s; + PolarDecompose(Apq,r,s); + pose.m_rot=r; + pose.m_scl=pose.m_aqq*r.transpose()*Apq; + if(m_cfg.maxvolume>1) + { + const btScalar idet=Clamp<btScalar>( 1/pose.m_scl.determinant(), + 1,m_cfg.maxvolume); + pose.m_scl=Mul(pose.m_scl,idet); + } + + } +} + +// +void btSoftBody::updateArea(bool averageArea) +{ + int i,ni; + + /* Face area */ + for(i=0,ni=m_faces.size();i<ni;++i) + { + Face& f=m_faces[i]; + f.m_ra = AreaOf(f.m_n[0]->m_x,f.m_n[1]->m_x,f.m_n[2]->m_x); + } + + /* Node area */ + + if (averageArea) + { + btAlignedObjectArray<int> counts; + counts.resize(m_nodes.size(),0); + for(i=0,ni=m_nodes.size();i<ni;++i) + { + m_nodes[i].m_area = 0; + } + for(i=0,ni=m_faces.size();i<ni;++i) + { + btSoftBody::Face& f=m_faces[i]; + for(int j=0;j<3;++j) + { + const int index=(int)(f.m_n[j]-&m_nodes[0]); + counts[index]++; + f.m_n[j]->m_area+=btFabs(f.m_ra); + } + } + for(i=0,ni=m_nodes.size();i<ni;++i) + { + if(counts[i]>0) + m_nodes[i].m_area/=(btScalar)counts[i]; + else + m_nodes[i].m_area=0; + } + } + else + { + // initialize node area as zero + for(i=0,ni=m_nodes.size();i<ni;++i) + { + m_nodes[i].m_area=0; + } + + for(i=0,ni=m_faces.size();i<ni;++i) + { + btSoftBody::Face& f=m_faces[i]; + + for(int j=0;j<3;++j) + { + f.m_n[j]->m_area += f.m_ra; + } + } + + for(i=0,ni=m_nodes.size();i<ni;++i) + { + m_nodes[i].m_area *= 0.3333333f; + } + } +} + + +void btSoftBody::updateLinkConstants() +{ + int i,ni; + + /* Links */ + for(i=0,ni=m_links.size();i<ni;++i) + { + Link& l=m_links[i]; + Material& m=*l.m_material; + l.m_c0 = (l.m_n[0]->m_im+l.m_n[1]->m_im)/m.m_kLST; + } +} + +void btSoftBody::updateConstants() +{ + resetLinkRestLengths(); + updateLinkConstants(); + updateArea(); +} + + + +// +void btSoftBody::initializeClusters() +{ + int i; + + for( i=0;i<m_clusters.size();++i) + { + Cluster& c=*m_clusters[i]; + c.m_imass=0; + c.m_masses.resize(c.m_nodes.size()); + for(int j=0;j<c.m_nodes.size();++j) + { + if (c.m_nodes[j]->m_im==0) + { + c.m_containsAnchor = true; + c.m_masses[j] = BT_LARGE_FLOAT; + } else + { + c.m_masses[j] = btScalar(1.)/c.m_nodes[j]->m_im; + } + c.m_imass += c.m_masses[j]; + } + c.m_imass = btScalar(1.)/c.m_imass; + c.m_com = btSoftBody::clusterCom(&c); + c.m_lv = btVector3(0,0,0); + c.m_av = btVector3(0,0,0); + c.m_leaf = 0; + /* Inertia */ + btMatrix3x3& ii=c.m_locii; + ii[0]=ii[1]=ii[2]=btVector3(0,0,0); + { + int i,ni; + + for(i=0,ni=c.m_nodes.size();i<ni;++i) + { + const btVector3 k=c.m_nodes[i]->m_x-c.m_com; + const btVector3 q=k*k; + const btScalar m=c.m_masses[i]; + ii[0][0] += m*(q[1]+q[2]); + ii[1][1] += m*(q[0]+q[2]); + ii[2][2] += m*(q[0]+q[1]); + ii[0][1] -= m*k[0]*k[1]; + ii[0][2] -= m*k[0]*k[2]; + ii[1][2] -= m*k[1]*k[2]; + } + } + ii[1][0]=ii[0][1]; + ii[2][0]=ii[0][2]; + ii[2][1]=ii[1][2]; + + ii = ii.inverse(); + + /* Frame */ + c.m_framexform.setIdentity(); + c.m_framexform.setOrigin(c.m_com); + c.m_framerefs.resize(c.m_nodes.size()); + { + int i; + for(i=0;i<c.m_framerefs.size();++i) + { + c.m_framerefs[i]=c.m_nodes[i]->m_x-c.m_com; + } + } + } +} + +// +void btSoftBody::updateClusters() +{ + BT_PROFILE("UpdateClusters"); + int i; + + for(i=0;i<m_clusters.size();++i) + { + btSoftBody::Cluster& c=*m_clusters[i]; + const int n=c.m_nodes.size(); + //const btScalar invn=1/(btScalar)n; + if(n) + { + /* Frame */ + const btScalar eps=btScalar(0.0001); + btMatrix3x3 m,r,s; + m[0]=m[1]=m[2]=btVector3(0,0,0); + m[0][0]=eps*1; + m[1][1]=eps*2; + m[2][2]=eps*3; + c.m_com=clusterCom(&c); + for(int i=0;i<c.m_nodes.size();++i) + { + const btVector3 a=c.m_nodes[i]->m_x-c.m_com; + const btVector3& b=c.m_framerefs[i]; + m[0]+=a[0]*b;m[1]+=a[1]*b;m[2]+=a[2]*b; + } + PolarDecompose(m,r,s); + c.m_framexform.setOrigin(c.m_com); + c.m_framexform.setBasis(r); + /* Inertia */ +#if 1/* Constant */ + c.m_invwi=c.m_framexform.getBasis()*c.m_locii*c.m_framexform.getBasis().transpose(); +#else +#if 0/* Sphere */ + const btScalar rk=(2*c.m_extents.length2())/(5*c.m_imass); + const btVector3 inertia(rk,rk,rk); + const btVector3 iin(btFabs(inertia[0])>SIMD_EPSILON?1/inertia[0]:0, + btFabs(inertia[1])>SIMD_EPSILON?1/inertia[1]:0, + btFabs(inertia[2])>SIMD_EPSILON?1/inertia[2]:0); + + c.m_invwi=c.m_xform.getBasis().scaled(iin)*c.m_xform.getBasis().transpose(); +#else/* Actual */ + c.m_invwi[0]=c.m_invwi[1]=c.m_invwi[2]=btVector3(0,0,0); + for(int i=0;i<n;++i) + { + const btVector3 k=c.m_nodes[i]->m_x-c.m_com; + const btVector3 q=k*k; + const btScalar m=1/c.m_nodes[i]->m_im; + c.m_invwi[0][0] += m*(q[1]+q[2]); + c.m_invwi[1][1] += m*(q[0]+q[2]); + c.m_invwi[2][2] += m*(q[0]+q[1]); + c.m_invwi[0][1] -= m*k[0]*k[1]; + c.m_invwi[0][2] -= m*k[0]*k[2]; + c.m_invwi[1][2] -= m*k[1]*k[2]; + } + c.m_invwi[1][0]=c.m_invwi[0][1]; + c.m_invwi[2][0]=c.m_invwi[0][2]; + c.m_invwi[2][1]=c.m_invwi[1][2]; + c.m_invwi=c.m_invwi.inverse(); +#endif +#endif + /* Velocities */ + c.m_lv=btVector3(0,0,0); + c.m_av=btVector3(0,0,0); + { + int i; + + for(i=0;i<n;++i) + { + const btVector3 v=c.m_nodes[i]->m_v*c.m_masses[i]; + c.m_lv += v; + c.m_av += btCross(c.m_nodes[i]->m_x-c.m_com,v); + } + } + c.m_lv=c.m_imass*c.m_lv*(1-c.m_ldamping); + c.m_av=c.m_invwi*c.m_av*(1-c.m_adamping); + c.m_vimpulses[0] = + c.m_vimpulses[1] = btVector3(0,0,0); + c.m_dimpulses[0] = + c.m_dimpulses[1] = btVector3(0,0,0); + c.m_nvimpulses = 0; + c.m_ndimpulses = 0; + /* Matching */ + if(c.m_matching>0) + { + for(int j=0;j<c.m_nodes.size();++j) + { + Node& n=*c.m_nodes[j]; + const btVector3 x=c.m_framexform*c.m_framerefs[j]; + n.m_x=Lerp(n.m_x,x,c.m_matching); + } + } + /* Dbvt */ + if(c.m_collide) + { + btVector3 mi=c.m_nodes[0]->m_x; + btVector3 mx=mi; + for(int j=1;j<n;++j) + { + mi.setMin(c.m_nodes[j]->m_x); + mx.setMax(c.m_nodes[j]->m_x); + } + ATTRIBUTE_ALIGNED16(btDbvtVolume) bounds=btDbvtVolume::FromMM(mi,mx); + if(c.m_leaf) + m_cdbvt.update(c.m_leaf,bounds,c.m_lv*m_sst.sdt*3,m_sst.radmrg); + else + c.m_leaf=m_cdbvt.insert(bounds,&c); + } + } + } + + +} + + + + +// +void btSoftBody::cleanupClusters() +{ + for(int i=0;i<m_joints.size();++i) + { + m_joints[i]->Terminate(m_sst.sdt); + if(m_joints[i]->m_delete) + { + btAlignedFree(m_joints[i]); + m_joints.remove(m_joints[i--]); + } + } +} + +// +void btSoftBody::prepareClusters(int iterations) +{ + for(int i=0;i<m_joints.size();++i) + { + m_joints[i]->Prepare(m_sst.sdt,iterations); + } +} + + +// +void btSoftBody::solveClusters(btScalar sor) +{ + for(int i=0,ni=m_joints.size();i<ni;++i) + { + m_joints[i]->Solve(m_sst.sdt,sor); + } +} + +// +void btSoftBody::applyClusters(bool drift) +{ + BT_PROFILE("ApplyClusters"); +// const btScalar f0=m_sst.sdt; + //const btScalar f1=f0/2; + btAlignedObjectArray<btVector3> deltas; + btAlignedObjectArray<btScalar> weights; + deltas.resize(m_nodes.size(),btVector3(0,0,0)); + weights.resize(m_nodes.size(),0); + int i; + + if(drift) + { + for(i=0;i<m_clusters.size();++i) + { + Cluster& c=*m_clusters[i]; + if(c.m_ndimpulses) + { + c.m_dimpulses[0]/=(btScalar)c.m_ndimpulses; + c.m_dimpulses[1]/=(btScalar)c.m_ndimpulses; + } + } + } + + for(i=0;i<m_clusters.size();++i) + { + Cluster& c=*m_clusters[i]; + if(0<(drift?c.m_ndimpulses:c.m_nvimpulses)) + { + const btVector3 v=(drift?c.m_dimpulses[0]:c.m_vimpulses[0])*m_sst.sdt; + const btVector3 w=(drift?c.m_dimpulses[1]:c.m_vimpulses[1])*m_sst.sdt; + for(int j=0;j<c.m_nodes.size();++j) + { + const int idx=int(c.m_nodes[j]-&m_nodes[0]); + const btVector3& x=c.m_nodes[j]->m_x; + const btScalar q=c.m_masses[j]; + deltas[idx] += (v+btCross(w,x-c.m_com))*q; + weights[idx] += q; + } + } + } + for(i=0;i<deltas.size();++i) + { + if(weights[i]>0) + { + m_nodes[i].m_x+=deltas[i]/weights[i]; + } + } +} + +// +void btSoftBody::dampClusters() +{ + int i; + + for(i=0;i<m_clusters.size();++i) + { + Cluster& c=*m_clusters[i]; + if(c.m_ndamping>0) + { + for(int j=0;j<c.m_nodes.size();++j) + { + Node& n=*c.m_nodes[j]; + if(n.m_im>0) + { + const btVector3 vx=c.m_lv+btCross(c.m_av,c.m_nodes[j]->m_q-c.m_com); + if(vx.length2()<=n.m_v.length2()) + { + n.m_v += c.m_ndamping*(vx-n.m_v); + } + } + } + } + } +} + +// +void btSoftBody::Joint::Prepare(btScalar dt,int) +{ + m_bodies[0].activate(); + m_bodies[1].activate(); +} + +// +void btSoftBody::LJoint::Prepare(btScalar dt,int iterations) +{ + static const btScalar maxdrift=4; + Joint::Prepare(dt,iterations); + m_rpos[0] = m_bodies[0].xform()*m_refs[0]; + m_rpos[1] = m_bodies[1].xform()*m_refs[1]; + m_drift = Clamp(m_rpos[0]-m_rpos[1],maxdrift)*m_erp/dt; + m_rpos[0] -= m_bodies[0].xform().getOrigin(); + m_rpos[1] -= m_bodies[1].xform().getOrigin(); + m_massmatrix = ImpulseMatrix( m_bodies[0].invMass(),m_bodies[0].invWorldInertia(),m_rpos[0], + m_bodies[1].invMass(),m_bodies[1].invWorldInertia(),m_rpos[1]); + if(m_split>0) + { + m_sdrift = m_massmatrix*(m_drift*m_split); + m_drift *= 1-m_split; + } + m_drift /=(btScalar)iterations; +} + +// +void btSoftBody::LJoint::Solve(btScalar dt,btScalar sor) +{ + const btVector3 va=m_bodies[0].velocity(m_rpos[0]); + const btVector3 vb=m_bodies[1].velocity(m_rpos[1]); + const btVector3 vr=va-vb; + btSoftBody::Impulse impulse; + impulse.m_asVelocity = 1; + impulse.m_velocity = m_massmatrix*(m_drift+vr*m_cfm)*sor; + m_bodies[0].applyImpulse(-impulse,m_rpos[0]); + m_bodies[1].applyImpulse( impulse,m_rpos[1]); +} + +// +void btSoftBody::LJoint::Terminate(btScalar dt) +{ + if(m_split>0) + { + m_bodies[0].applyDImpulse(-m_sdrift,m_rpos[0]); + m_bodies[1].applyDImpulse( m_sdrift,m_rpos[1]); + } +} + +// +void btSoftBody::AJoint::Prepare(btScalar dt,int iterations) +{ + static const btScalar maxdrift=SIMD_PI/16; + m_icontrol->Prepare(this); + Joint::Prepare(dt,iterations); + m_axis[0] = m_bodies[0].xform().getBasis()*m_refs[0]; + m_axis[1] = m_bodies[1].xform().getBasis()*m_refs[1]; + m_drift = NormalizeAny(btCross(m_axis[1],m_axis[0])); + m_drift *= btMin(maxdrift,btAcos(Clamp<btScalar>(btDot(m_axis[0],m_axis[1]),-1,+1))); + m_drift *= m_erp/dt; + m_massmatrix= AngularImpulseMatrix(m_bodies[0].invWorldInertia(),m_bodies[1].invWorldInertia()); + if(m_split>0) + { + m_sdrift = m_massmatrix*(m_drift*m_split); + m_drift *= 1-m_split; + } + m_drift /=(btScalar)iterations; +} + +// +void btSoftBody::AJoint::Solve(btScalar dt,btScalar sor) +{ + const btVector3 va=m_bodies[0].angularVelocity(); + const btVector3 vb=m_bodies[1].angularVelocity(); + const btVector3 vr=va-vb; + const btScalar sp=btDot(vr,m_axis[0]); + const btVector3 vc=vr-m_axis[0]*m_icontrol->Speed(this,sp); + btSoftBody::Impulse impulse; + impulse.m_asVelocity = 1; + impulse.m_velocity = m_massmatrix*(m_drift+vc*m_cfm)*sor; + m_bodies[0].applyAImpulse(-impulse); + m_bodies[1].applyAImpulse( impulse); +} + +// +void btSoftBody::AJoint::Terminate(btScalar dt) +{ + if(m_split>0) + { + m_bodies[0].applyDAImpulse(-m_sdrift); + m_bodies[1].applyDAImpulse( m_sdrift); + } +} + +// +void btSoftBody::CJoint::Prepare(btScalar dt,int iterations) +{ + Joint::Prepare(dt,iterations); + const bool dodrift=(m_life==0); + m_delete=(++m_life)>m_maxlife; + if(dodrift) + { + m_drift=m_drift*m_erp/dt; + if(m_split>0) + { + m_sdrift = m_massmatrix*(m_drift*m_split); + m_drift *= 1-m_split; + } + m_drift/=(btScalar)iterations; + } + else + { + m_drift=m_sdrift=btVector3(0,0,0); + } +} + +// +void btSoftBody::CJoint::Solve(btScalar dt,btScalar sor) +{ + const btVector3 va=m_bodies[0].velocity(m_rpos[0]); + const btVector3 vb=m_bodies[1].velocity(m_rpos[1]); + const btVector3 vrel=va-vb; + const btScalar rvac=btDot(vrel,m_normal); + btSoftBody::Impulse impulse; + impulse.m_asVelocity = 1; + impulse.m_velocity = m_drift; + if(rvac<0) + { + const btVector3 iv=m_normal*rvac; + const btVector3 fv=vrel-iv; + impulse.m_velocity += iv+fv*m_friction; + } + impulse.m_velocity=m_massmatrix*impulse.m_velocity*sor; + + if (m_bodies[0].m_soft==m_bodies[1].m_soft) + { + if ((impulse.m_velocity.getX() ==impulse.m_velocity.getX())&&(impulse.m_velocity.getY() ==impulse.m_velocity.getY())&& + (impulse.m_velocity.getZ() ==impulse.m_velocity.getZ())) + { + if (impulse.m_asVelocity) + { + if (impulse.m_velocity.length() <m_bodies[0].m_soft->m_maxSelfCollisionImpulse) + { + + } else + { + m_bodies[0].applyImpulse(-impulse*m_bodies[0].m_soft->m_selfCollisionImpulseFactor,m_rpos[0]); + m_bodies[1].applyImpulse( impulse*m_bodies[0].m_soft->m_selfCollisionImpulseFactor,m_rpos[1]); + } + } + } + } else + { + m_bodies[0].applyImpulse(-impulse,m_rpos[0]); + m_bodies[1].applyImpulse( impulse,m_rpos[1]); + } +} + +// +void btSoftBody::CJoint::Terminate(btScalar dt) +{ + if(m_split>0) + { + m_bodies[0].applyDImpulse(-m_sdrift,m_rpos[0]); + m_bodies[1].applyDImpulse( m_sdrift,m_rpos[1]); + } +} + +// +void btSoftBody::applyForces() +{ + + BT_PROFILE("SoftBody applyForces"); +// const btScalar dt = m_sst.sdt; + const btScalar kLF = m_cfg.kLF; + const btScalar kDG = m_cfg.kDG; + const btScalar kPR = m_cfg.kPR; + const btScalar kVC = m_cfg.kVC; + const bool as_lift = kLF>0; + const bool as_drag = kDG>0; + const bool as_pressure = kPR!=0; + const bool as_volume = kVC>0; + const bool as_aero = as_lift || + as_drag ; + //const bool as_vaero = as_aero && + // (m_cfg.aeromodel < btSoftBody::eAeroModel::F_TwoSided); + //const bool as_faero = as_aero && + // (m_cfg.aeromodel >= btSoftBody::eAeroModel::F_TwoSided); + const bool use_medium = as_aero; + const bool use_volume = as_pressure || + as_volume ; + btScalar volume = 0; + btScalar ivolumetp = 0; + btScalar dvolumetv = 0; + btSoftBody::sMedium medium; + if(use_volume) + { + volume = getVolume(); + ivolumetp = 1/btFabs(volume)*kPR; + dvolumetv = (m_pose.m_volume-volume)*kVC; + } + /* Per vertex forces */ + int i,ni; + + for(i=0,ni=m_nodes.size();i<ni;++i) + { + btSoftBody::Node& n=m_nodes[i]; + if(n.m_im>0) + { + if(use_medium) + { + /* Aerodynamics */ + addAeroForceToNode(m_windVelocity, i); + } + /* Pressure */ + if(as_pressure) + { + n.m_f += n.m_n*(n.m_area*ivolumetp); + } + /* Volume */ + if(as_volume) + { + n.m_f += n.m_n*(n.m_area*dvolumetv); + } + } + } + + /* Per face forces */ + for(i=0,ni=m_faces.size();i<ni;++i) + { + // btSoftBody::Face& f=m_faces[i]; + + /* Aerodynamics */ + addAeroForceToFace(m_windVelocity, i); + } +} + +// +void btSoftBody::PSolve_Anchors(btSoftBody* psb,btScalar kst,btScalar ti) +{ + BT_PROFILE("PSolve_Anchors"); + const btScalar kAHR=psb->m_cfg.kAHR*kst; + const btScalar dt=psb->m_sst.sdt; + for(int i=0,ni=psb->m_anchors.size();i<ni;++i) + { + const Anchor& a=psb->m_anchors[i]; + const btTransform& t=a.m_body->getWorldTransform(); + Node& n=*a.m_node; + const btVector3 wa=t*a.m_local; + const btVector3 va=a.m_body->getVelocityInLocalPoint(a.m_c1)*dt; + const btVector3 vb=n.m_x-n.m_q; + const btVector3 vr=(va-vb)+(wa-n.m_x)*kAHR; + const btVector3 impulse=a.m_c0*vr*a.m_influence; + n.m_x+=impulse*a.m_c2; + a.m_body->applyImpulse(-impulse,a.m_c1); + } +} + + +// +void btSoftBody::PSolve_RContacts(btSoftBody* psb, btScalar kst, btScalar ti) +{ + BT_PROFILE("PSolve_RContacts"); + const btScalar dt = psb->m_sst.sdt; + const btScalar mrg = psb->getCollisionShape()->getMargin(); + btMultiBodyJacobianData jacobianData; + for(int i=0,ni=psb->m_rcontacts.size();i<ni;++i) + { + const RContact& c = psb->m_rcontacts[i]; + const sCti& cti = c.m_cti; + if (cti.m_colObj->hasContactResponse()) + { + btVector3 va(0,0,0); + btRigidBody* rigidCol=0; + btMultiBodyLinkCollider* multibodyLinkCol=0; + btScalar* deltaV; + + if (cti.m_colObj->getInternalType() == btCollisionObject::CO_RIGID_BODY) + { + rigidCol = (btRigidBody*)btRigidBody::upcast(cti.m_colObj); + va = rigidCol ? rigidCol->getVelocityInLocalPoint(c.m_c1)*dt : 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; + jacobianData.m_jacobians.resize(ndof); + jacobianData.m_deltaVelocitiesUnitImpulse.resize(ndof); + btScalar* jac=&jacobianData.m_jacobians[0]; + + multibodyLinkCol->m_multiBody->fillContactJacobianMultiDof(multibodyLinkCol->m_link, c.m_node->m_x, cti.m_normal, jac, jacobianData.scratch_r, jacobianData.scratch_v, jacobianData.scratch_m); + deltaV = &jacobianData.m_deltaVelocitiesUnitImpulse[0]; + multibodyLinkCol->m_multiBody->calcAccelerationDeltasMultiDof(&jacobianData.m_jacobians[0],deltaV,jacobianData.scratch_r, jacobianData.scratch_v); + + btScalar vel = 0.0; + for (int j = 0; j < ndof ; ++j) { + vel += multibodyLinkCol->m_multiBody->getVelocityVector()[j] * jac[j]; + } + va = cti.m_normal*vel*dt; + } + } + + const btVector3 vb = c.m_node->m_x-c.m_node->m_q; + const btVector3 vr = vb-va; + const btScalar dn = btDot(vr, cti.m_normal); + if(dn<=SIMD_EPSILON) + { + const btScalar dp = btMin( (btDot(c.m_node->m_x, cti.m_normal) + cti.m_offset), mrg ); + const btVector3 fv = vr - (cti.m_normal * dn); + // c0 is the impulse matrix, c3 is 1 - the friction coefficient or 0, c4 is the contact hardness coefficient + const btVector3 impulse = c.m_c0 * ( (vr - (fv * c.m_c3) + (cti.m_normal * (dp * c.m_c4))) * kst ); + c.m_node->m_x -= impulse * c.m_c2; + + if (cti.m_colObj->getInternalType() == btCollisionObject::CO_RIGID_BODY) + { + if (rigidCol) + rigidCol->applyImpulse(impulse,c.m_c1); + } + else if (cti.m_colObj->getInternalType() == btCollisionObject::CO_FEATHERSTONE_LINK) + { + if (multibodyLinkCol) + { + double multiplier = 0.5; + multibodyLinkCol->m_multiBody->applyDeltaVeeMultiDof(deltaV,-impulse.length()*multiplier); + } + } + } + } + } +} + +// +void btSoftBody::PSolve_SContacts(btSoftBody* psb,btScalar,btScalar ti) +{ + BT_PROFILE("PSolve_SContacts"); + + for(int i=0,ni=psb->m_scontacts.size();i<ni;++i) + { + const SContact& c=psb->m_scontacts[i]; + const btVector3& nr=c.m_normal; + Node& n=*c.m_node; + Face& f=*c.m_face; + const btVector3 p=BaryEval( f.m_n[0]->m_x, + f.m_n[1]->m_x, + f.m_n[2]->m_x, + c.m_weights); + const btVector3 q=BaryEval( f.m_n[0]->m_q, + f.m_n[1]->m_q, + f.m_n[2]->m_q, + c.m_weights); + const btVector3 vr=(n.m_x-n.m_q)-(p-q); + btVector3 corr(0,0,0); + btScalar dot = btDot(vr,nr); + if(dot<0) + { + const btScalar j=c.m_margin-(btDot(nr,n.m_x)-btDot(nr,p)); + corr+=c.m_normal*j; + } + corr -= ProjectOnPlane(vr,nr)*c.m_friction; + n.m_x += corr*c.m_cfm[0]; + f.m_n[0]->m_x -= corr*(c.m_cfm[1]*c.m_weights.x()); + f.m_n[1]->m_x -= corr*(c.m_cfm[1]*c.m_weights.y()); + f.m_n[2]->m_x -= corr*(c.m_cfm[1]*c.m_weights.z()); + } +} + +// +void btSoftBody::PSolve_Links(btSoftBody* psb,btScalar kst,btScalar ti) +{ +BT_PROFILE("PSolve_Links"); + for(int i=0,ni=psb->m_links.size();i<ni;++i) + { + Link& l=psb->m_links[i]; + if(l.m_c0>0) + { + Node& a=*l.m_n[0]; + Node& b=*l.m_n[1]; + const btVector3 del=b.m_x-a.m_x; + const btScalar len=del.length2(); + if (l.m_c1+len > SIMD_EPSILON) + { + const btScalar k=((l.m_c1-len)/(l.m_c0*(l.m_c1+len)))*kst; + a.m_x-=del*(k*a.m_im); + b.m_x+=del*(k*b.m_im); + } + } + } +} + +// +void btSoftBody::VSolve_Links(btSoftBody* psb,btScalar kst) +{ + BT_PROFILE("VSolve_Links"); + for(int i=0,ni=psb->m_links.size();i<ni;++i) + { + Link& l=psb->m_links[i]; + Node** n=l.m_n; + const btScalar j=-btDot(l.m_c3,n[0]->m_v-n[1]->m_v)*l.m_c2*kst; + n[0]->m_v+= l.m_c3*(j*n[0]->m_im); + n[1]->m_v-= l.m_c3*(j*n[1]->m_im); + } +} + +// +btSoftBody::psolver_t btSoftBody::getSolver(ePSolver::_ solver) +{ + switch(solver) + { + case ePSolver::Anchors: + return(&btSoftBody::PSolve_Anchors); + case ePSolver::Linear: + return(&btSoftBody::PSolve_Links); + case ePSolver::RContacts: + return(&btSoftBody::PSolve_RContacts); + case ePSolver::SContacts: + return(&btSoftBody::PSolve_SContacts); + default: + { + } + } + return(0); +} + +// +btSoftBody::vsolver_t btSoftBody::getSolver(eVSolver::_ solver) +{ + switch(solver) + { + case eVSolver::Linear: return(&btSoftBody::VSolve_Links); + default: + { + } + } + return(0); +} + +// +void btSoftBody::defaultCollisionHandler(const btCollisionObjectWrapper* pcoWrap) +{ + + switch(m_cfg.collisions&fCollision::RVSmask) + { + case fCollision::SDF_RS: + { + btSoftColliders::CollideSDF_RS docollide; + btRigidBody* prb1=(btRigidBody*) btRigidBody::upcast(pcoWrap->getCollisionObject()); + btTransform wtr=pcoWrap->getWorldTransform(); + + const btTransform ctr=pcoWrap->getWorldTransform(); + const btScalar timemargin=(wtr.getOrigin()-ctr.getOrigin()).length(); + const btScalar basemargin=getCollisionShape()->getMargin(); + btVector3 mins; + btVector3 maxs; + ATTRIBUTE_ALIGNED16(btDbvtVolume) volume; + pcoWrap->getCollisionShape()->getAabb( pcoWrap->getWorldTransform(), + mins, + maxs); + volume=btDbvtVolume::FromMM(mins,maxs); + volume.Expand(btVector3(basemargin,basemargin,basemargin)); + docollide.psb = this; + docollide.m_colObj1Wrap = pcoWrap; + docollide.m_rigidBody = prb1; + + docollide.dynmargin = basemargin+timemargin; + docollide.stamargin = basemargin; + m_ndbvt.collideTV(m_ndbvt.m_root,volume,docollide); + } + break; + case fCollision::CL_RS: + { + btSoftColliders::CollideCL_RS collider; + collider.ProcessColObj(this,pcoWrap); + } + break; + } +} + +// +void btSoftBody::defaultCollisionHandler(btSoftBody* psb) +{ + const int cf=m_cfg.collisions&psb->m_cfg.collisions; + switch(cf&fCollision::SVSmask) + { + case fCollision::CL_SS: + { + + //support self-collision if CL_SELF flag set + if (this!=psb || psb->m_cfg.collisions&fCollision::CL_SELF) + { + btSoftColliders::CollideCL_SS docollide; + docollide.ProcessSoftSoft(this,psb); + } + + } + break; + case fCollision::VF_SS: + { + //only self-collision for Cluster, not Vertex-Face yet + if (this!=psb) + { + btSoftColliders::CollideVF_SS docollide; + /* common */ + docollide.mrg= getCollisionShape()->getMargin()+ + psb->getCollisionShape()->getMargin(); + /* psb0 nodes vs psb1 faces */ + 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 */ + 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); + } + } + break; + default: + { + + } + } +} + + + +void btSoftBody::setWindVelocity( const btVector3 &velocity ) +{ + m_windVelocity = velocity; +} + + +const btVector3& btSoftBody::getWindVelocity() +{ + return m_windVelocity; +} + + + +int btSoftBody::calculateSerializeBufferSize() const +{ + int sz = sizeof(btSoftBodyData); + return sz; +} + + ///fills the dataBuffer and returns the struct name (and 0 on failure) +const char* btSoftBody::serialize(void* dataBuffer, class btSerializer* serializer) const +{ + btSoftBodyData* sbd = (btSoftBodyData*) dataBuffer; + + btCollisionObject::serialize(&sbd->m_collisionObjectData, serializer); + + btHashMap<btHashPtr,int> m_nodeIndexMap; + + sbd->m_numMaterials = m_materials.size(); + sbd->m_materials = sbd->m_numMaterials? (SoftBodyMaterialData**) serializer->getUniquePointer((void*)&m_materials): 0; + + if (sbd->m_materials) + { + int sz = sizeof(SoftBodyMaterialData*); + int numElem = sbd->m_numMaterials; + btChunk* chunk = serializer->allocate(sz,numElem); + //SoftBodyMaterialData** memPtr = chunk->m_oldPtr; + SoftBodyMaterialData** memPtr = (SoftBodyMaterialData**)chunk->m_oldPtr; + for (int i=0;i<numElem;i++,memPtr++) + { + btSoftBody::Material* mat = m_materials[i]; + *memPtr = mat ? (SoftBodyMaterialData*)serializer->getUniquePointer((void*)mat) : 0; + if (!serializer->findPointer(mat)) + { + //serialize it here + btChunk* chunk = serializer->allocate(sizeof(SoftBodyMaterialData),1); + SoftBodyMaterialData* memPtr = (SoftBodyMaterialData*)chunk->m_oldPtr; + memPtr->m_flags = mat->m_flags; + memPtr->m_angularStiffness = mat->m_kAST; + memPtr->m_linearStiffness = mat->m_kLST; + memPtr->m_volumeStiffness = mat->m_kVST; + serializer->finalizeChunk(chunk,"SoftBodyMaterialData",BT_SBMATERIAL_CODE,mat); + } + } + serializer->finalizeChunk(chunk,"SoftBodyMaterialData",BT_ARRAY_CODE,(void*) &m_materials); + } + + + + + sbd->m_numNodes = m_nodes.size(); + sbd->m_nodes = sbd->m_numNodes ? (SoftBodyNodeData*)serializer->getUniquePointer((void*)&m_nodes): 0; + if (sbd->m_nodes) + { + int sz = sizeof(SoftBodyNodeData); + int numElem = sbd->m_numNodes; + btChunk* chunk = serializer->allocate(sz,numElem); + SoftBodyNodeData* memPtr = (SoftBodyNodeData*)chunk->m_oldPtr; + for (int i=0;i<numElem;i++,memPtr++) + { + m_nodes[i].m_f.serializeFloat( memPtr->m_accumulatedForce); + memPtr->m_area = m_nodes[i].m_area; + memPtr->m_attach = m_nodes[i].m_battach; + memPtr->m_inverseMass = m_nodes[i].m_im; + memPtr->m_material = m_nodes[i].m_material? (SoftBodyMaterialData*)serializer->getUniquePointer((void*) m_nodes[i].m_material):0; + m_nodes[i].m_n.serializeFloat(memPtr->m_normal); + m_nodes[i].m_x.serializeFloat(memPtr->m_position); + m_nodes[i].m_q.serializeFloat(memPtr->m_previousPosition); + m_nodes[i].m_v.serializeFloat(memPtr->m_velocity); + m_nodeIndexMap.insert(&m_nodes[i],i); + } + serializer->finalizeChunk(chunk,"SoftBodyNodeData",BT_SBNODE_CODE,(void*) &m_nodes); + } + + sbd->m_numLinks = m_links.size(); + sbd->m_links = sbd->m_numLinks? (SoftBodyLinkData*) serializer->getUniquePointer((void*)&m_links[0]):0; + if (sbd->m_links) + { + int sz = sizeof(SoftBodyLinkData); + int numElem = sbd->m_numLinks; + btChunk* chunk = serializer->allocate(sz,numElem); + SoftBodyLinkData* memPtr = (SoftBodyLinkData*)chunk->m_oldPtr; + for (int i=0;i<numElem;i++,memPtr++) + { + memPtr->m_bbending = m_links[i].m_bbending; + memPtr->m_material = m_links[i].m_material? (SoftBodyMaterialData*)serializer->getUniquePointer((void*) m_links[i].m_material):0; + memPtr->m_nodeIndices[0] = m_links[i].m_n[0] ? m_links[i].m_n[0] - &m_nodes[0]: -1; + memPtr->m_nodeIndices[1] = m_links[i].m_n[1] ? m_links[i].m_n[1] - &m_nodes[0]: -1; + btAssert(memPtr->m_nodeIndices[0]<m_nodes.size()); + btAssert(memPtr->m_nodeIndices[1]<m_nodes.size()); + memPtr->m_restLength = m_links[i].m_rl; + } + serializer->finalizeChunk(chunk,"SoftBodyLinkData",BT_ARRAY_CODE,(void*) &m_links[0]); + + } + + + sbd->m_numFaces = m_faces.size(); + sbd->m_faces = sbd->m_numFaces? (SoftBodyFaceData*) serializer->getUniquePointer((void*)&m_faces[0]):0; + if (sbd->m_faces) + { + int sz = sizeof(SoftBodyFaceData); + int numElem = sbd->m_numFaces; + btChunk* chunk = serializer->allocate(sz,numElem); + SoftBodyFaceData* memPtr = (SoftBodyFaceData*)chunk->m_oldPtr; + for (int i=0;i<numElem;i++,memPtr++) + { + memPtr->m_material = m_faces[i].m_material ? (SoftBodyMaterialData*) serializer->getUniquePointer((void*)m_faces[i].m_material): 0; + m_faces[i].m_normal.serializeFloat( memPtr->m_normal); + for (int j=0;j<3;j++) + { + memPtr->m_nodeIndices[j] = m_faces[i].m_n[j]? m_faces[i].m_n[j] - &m_nodes[0]: -1; + } + memPtr->m_restArea = m_faces[i].m_ra; + } + serializer->finalizeChunk(chunk,"SoftBodyFaceData",BT_ARRAY_CODE,(void*) &m_faces[0]); + } + + + sbd->m_numTetrahedra = m_tetras.size(); + sbd->m_tetrahedra = sbd->m_numTetrahedra ? (SoftBodyTetraData*) serializer->getUniquePointer((void*)&m_tetras[0]):0; + if (sbd->m_tetrahedra) + { + int sz = sizeof(SoftBodyTetraData); + int numElem = sbd->m_numTetrahedra; + btChunk* chunk = serializer->allocate(sz,numElem); + SoftBodyTetraData* memPtr = (SoftBodyTetraData*)chunk->m_oldPtr; + for (int i=0;i<numElem;i++,memPtr++) + { + for (int j=0;j<4;j++) + { + m_tetras[i].m_c0[j].serializeFloat( memPtr->m_c0[j] ); + memPtr->m_nodeIndices[j] = m_tetras[j].m_n[j]? m_tetras[j].m_n[j]-&m_nodes[0] : -1; + } + memPtr->m_c1 = m_tetras[i].m_c1; + memPtr->m_c2 = m_tetras[i].m_c2; + memPtr->m_material = m_tetras[i].m_material ? (SoftBodyMaterialData*)serializer->getUniquePointer((void*) m_tetras[i].m_material): 0; + memPtr->m_restVolume = m_tetras[i].m_rv; + } + serializer->finalizeChunk(chunk,"SoftBodyTetraData",BT_ARRAY_CODE,(void*) &m_tetras[0]); + } + + sbd->m_numAnchors = m_anchors.size(); + sbd->m_anchors = sbd->m_numAnchors ? (SoftRigidAnchorData*) serializer->getUniquePointer((void*)&m_anchors[0]):0; + if (sbd->m_anchors) + { + int sz = sizeof(SoftRigidAnchorData); + int numElem = sbd->m_numAnchors; + btChunk* chunk = serializer->allocate(sz,numElem); + SoftRigidAnchorData* memPtr = (SoftRigidAnchorData*)chunk->m_oldPtr; + for (int i=0;i<numElem;i++,memPtr++) + { + m_anchors[i].m_c0.serializeFloat(memPtr->m_c0); + m_anchors[i].m_c1.serializeFloat(memPtr->m_c1); + memPtr->m_c2 = m_anchors[i].m_c2; + m_anchors[i].m_local.serializeFloat(memPtr->m_localFrame); + memPtr->m_nodeIndex = m_anchors[i].m_node? m_anchors[i].m_node-&m_nodes[0]: -1; + + memPtr->m_rigidBody = m_anchors[i].m_body? (btRigidBodyData*) serializer->getUniquePointer((void*)m_anchors[i].m_body): 0; + btAssert(memPtr->m_nodeIndex < m_nodes.size()); + } + serializer->finalizeChunk(chunk,"SoftRigidAnchorData",BT_ARRAY_CODE,(void*) &m_anchors[0]); + } + + + sbd->m_config.m_dynamicFriction = m_cfg.kDF; + sbd->m_config.m_baumgarte = m_cfg.kVCF; + sbd->m_config.m_pressure = m_cfg.kPR; + sbd->m_config.m_aeroModel = this->m_cfg.aeromodel; + sbd->m_config.m_lift = m_cfg.kLF; + sbd->m_config.m_drag = m_cfg.kDG; + sbd->m_config.m_positionIterations = m_cfg.piterations; + sbd->m_config.m_driftIterations = m_cfg.diterations; + sbd->m_config.m_clusterIterations = m_cfg.citerations; + sbd->m_config.m_velocityIterations = m_cfg.viterations; + sbd->m_config.m_maxVolume = m_cfg.maxvolume; + sbd->m_config.m_damping = m_cfg.kDP; + sbd->m_config.m_poseMatch = m_cfg.kMT; + sbd->m_config.m_collisionFlags = m_cfg.collisions; + sbd->m_config.m_volume = m_cfg.kVC; + sbd->m_config.m_rigidContactHardness = m_cfg.kCHR; + sbd->m_config.m_kineticContactHardness = m_cfg.kKHR; + sbd->m_config.m_softContactHardness = m_cfg.kSHR; + sbd->m_config.m_anchorHardness = m_cfg.kAHR; + sbd->m_config.m_timeScale = m_cfg.timescale; + sbd->m_config.m_maxVolume = m_cfg.maxvolume; + sbd->m_config.m_softRigidClusterHardness = m_cfg.kSRHR_CL; + sbd->m_config.m_softKineticClusterHardness = m_cfg.kSKHR_CL; + sbd->m_config.m_softSoftClusterHardness = m_cfg.kSSHR_CL; + sbd->m_config.m_softRigidClusterImpulseSplit = m_cfg.kSR_SPLT_CL; + sbd->m_config.m_softKineticClusterImpulseSplit = m_cfg.kSK_SPLT_CL; + sbd->m_config.m_softSoftClusterImpulseSplit = m_cfg.kSS_SPLT_CL; + + //pose for shape matching + { + sbd->m_pose = (SoftBodyPoseData*)serializer->getUniquePointer((void*)&m_pose); + + int sz = sizeof(SoftBodyPoseData); + btChunk* chunk = serializer->allocate(sz,1); + SoftBodyPoseData* memPtr = (SoftBodyPoseData*)chunk->m_oldPtr; + + m_pose.m_aqq.serializeFloat(memPtr->m_aqq); + memPtr->m_bframe = m_pose.m_bframe; + memPtr->m_bvolume = m_pose.m_bvolume; + m_pose.m_com.serializeFloat(memPtr->m_com); + + memPtr->m_numPositions = m_pose.m_pos.size(); + memPtr->m_positions = memPtr->m_numPositions ? (btVector3FloatData*)serializer->getUniquePointer((void*)&m_pose.m_pos[0]): 0; + if (memPtr->m_numPositions) + { + int numElem = memPtr->m_numPositions; + int sz = sizeof(btVector3Data); + btChunk* chunk = serializer->allocate(sz,numElem); + btVector3FloatData* memPtr = (btVector3FloatData*)chunk->m_oldPtr; + for (int i=0;i<numElem;i++,memPtr++) + { + m_pose.m_pos[i].serializeFloat(*memPtr); + } + serializer->finalizeChunk(chunk,"btVector3FloatData",BT_ARRAY_CODE,(void*)&m_pose.m_pos[0]); + } + memPtr->m_restVolume = m_pose.m_volume; + m_pose.m_rot.serializeFloat(memPtr->m_rot); + m_pose.m_scl.serializeFloat(memPtr->m_scale); + + memPtr->m_numWeigts = m_pose.m_wgh.size(); + memPtr->m_weights = memPtr->m_numWeigts? (float*) serializer->getUniquePointer((void*) &m_pose.m_wgh[0]) : 0; + if (memPtr->m_numWeigts) + { + + int numElem = memPtr->m_numWeigts; + int sz = sizeof(float); + btChunk* chunk = serializer->allocate(sz,numElem); + float* memPtr = (float*) chunk->m_oldPtr; + for (int i=0;i<numElem;i++,memPtr++) + { + *memPtr = m_pose.m_wgh[i]; + } + serializer->finalizeChunk(chunk,"float",BT_ARRAY_CODE,(void*)&m_pose.m_wgh[0]); + } + + serializer->finalizeChunk(chunk,"SoftBodyPoseData",BT_ARRAY_CODE,(void*)&m_pose); + } + + //clusters for convex-cluster collision detection + + sbd->m_numClusters = m_clusters.size(); + sbd->m_clusters = sbd->m_numClusters? (SoftBodyClusterData*) serializer->getUniquePointer((void*)m_clusters[0]) : 0; + if (sbd->m_numClusters) + { + int numElem = sbd->m_numClusters; + int sz = sizeof(SoftBodyClusterData); + btChunk* chunk = serializer->allocate(sz,numElem); + SoftBodyClusterData* memPtr = (SoftBodyClusterData*) chunk->m_oldPtr; + for (int i=0;i<numElem;i++,memPtr++) + { + memPtr->m_adamping= m_clusters[i]->m_adamping; + m_clusters[i]->m_av.serializeFloat(memPtr->m_av); + memPtr->m_clusterIndex = m_clusters[i]->m_clusterIndex; + memPtr->m_collide = m_clusters[i]->m_collide; + m_clusters[i]->m_com.serializeFloat(memPtr->m_com); + memPtr->m_containsAnchor = m_clusters[i]->m_containsAnchor; + m_clusters[i]->m_dimpulses[0].serializeFloat(memPtr->m_dimpulses[0]); + m_clusters[i]->m_dimpulses[1].serializeFloat(memPtr->m_dimpulses[1]); + m_clusters[i]->m_framexform.serializeFloat(memPtr->m_framexform); + memPtr->m_idmass = m_clusters[i]->m_idmass; + memPtr->m_imass = m_clusters[i]->m_imass; + m_clusters[i]->m_invwi.serializeFloat(memPtr->m_invwi); + memPtr->m_ldamping = m_clusters[i]->m_ldamping; + m_clusters[i]->m_locii.serializeFloat(memPtr->m_locii); + m_clusters[i]->m_lv.serializeFloat(memPtr->m_lv); + memPtr->m_matching = m_clusters[i]->m_matching; + memPtr->m_maxSelfCollisionImpulse = m_clusters[i]->m_maxSelfCollisionImpulse; + memPtr->m_ndamping = m_clusters[i]->m_ndamping; + memPtr->m_ldamping = m_clusters[i]->m_ldamping; + memPtr->m_adamping = m_clusters[i]->m_adamping; + memPtr->m_selfCollisionImpulseFactor = m_clusters[i]->m_selfCollisionImpulseFactor; + + memPtr->m_numFrameRefs = m_clusters[i]->m_framerefs.size(); + memPtr->m_numMasses = m_clusters[i]->m_masses.size(); + memPtr->m_numNodes = m_clusters[i]->m_nodes.size(); + + memPtr->m_nvimpulses = m_clusters[i]->m_nvimpulses; + m_clusters[i]->m_vimpulses[0].serializeFloat(memPtr->m_vimpulses[0]); + m_clusters[i]->m_vimpulses[1].serializeFloat(memPtr->m_vimpulses[1]); + memPtr->m_ndimpulses = m_clusters[i]->m_ndimpulses; + + + + memPtr->m_framerefs = memPtr->m_numFrameRefs? (btVector3FloatData*)serializer->getUniquePointer((void*)&m_clusters[i]->m_framerefs[0]) : 0; + if (memPtr->m_framerefs) + { + int numElem = memPtr->m_numFrameRefs; + int sz = sizeof(btVector3FloatData); + btChunk* chunk = serializer->allocate(sz,numElem); + btVector3FloatData* memPtr = (btVector3FloatData*) chunk->m_oldPtr; + for (int j=0;j<numElem;j++,memPtr++) + { + m_clusters[i]->m_framerefs[j].serializeFloat(*memPtr); + } + serializer->finalizeChunk(chunk,"btVector3FloatData",BT_ARRAY_CODE,(void*)&m_clusters[i]->m_framerefs[0]); + } + + memPtr->m_masses = memPtr->m_numMasses ? (float*) serializer->getUniquePointer((void*)&m_clusters[i]->m_masses[0]): 0; + if (memPtr->m_masses) + { + int numElem = memPtr->m_numMasses; + int sz = sizeof(float); + btChunk* chunk = serializer->allocate(sz,numElem); + float* memPtr = (float*) chunk->m_oldPtr; + for (int j=0;j<numElem;j++,memPtr++) + { + *memPtr = m_clusters[i]->m_masses[j]; + } + serializer->finalizeChunk(chunk,"float",BT_ARRAY_CODE,(void*)&m_clusters[i]->m_masses[0]); + } + + memPtr->m_nodeIndices = memPtr->m_numNodes ? (int*) serializer->getUniquePointer((void*) &m_clusters[i]->m_nodes) : 0; + if (memPtr->m_nodeIndices ) + { + int numElem = memPtr->m_numMasses; + int sz = sizeof(int); + btChunk* chunk = serializer->allocate(sz,numElem); + int* memPtr = (int*) chunk->m_oldPtr; + for (int j=0;j<numElem;j++,memPtr++) + { + int* indexPtr = m_nodeIndexMap.find(m_clusters[i]->m_nodes[j]); + btAssert(indexPtr); + *memPtr = *indexPtr; + } + serializer->finalizeChunk(chunk,"int",BT_ARRAY_CODE,(void*)&m_clusters[i]->m_nodes); + } + } + serializer->finalizeChunk(chunk,"SoftBodyClusterData",BT_ARRAY_CODE,(void*)m_clusters[0]); + + } + + + + sbd->m_numJoints = m_joints.size(); + sbd->m_joints = m_joints.size()? (btSoftBodyJointData*) serializer->getUniquePointer((void*)&m_joints[0]) : 0; + + if (sbd->m_joints) + { + int sz = sizeof(btSoftBodyJointData); + int numElem = m_joints.size(); + btChunk* chunk = serializer->allocate(sz,numElem); + btSoftBodyJointData* memPtr = (btSoftBodyJointData*)chunk->m_oldPtr; + + for (int i=0;i<numElem;i++,memPtr++) + { + memPtr->m_jointType = (int)m_joints[i]->Type(); + m_joints[i]->m_refs[0].serializeFloat(memPtr->m_refs[0]); + m_joints[i]->m_refs[1].serializeFloat(memPtr->m_refs[1]); + memPtr->m_cfm = m_joints[i]->m_cfm; + memPtr->m_erp = float(m_joints[i]->m_erp); + memPtr->m_split = float(m_joints[i]->m_split); + memPtr->m_delete = m_joints[i]->m_delete; + + for (int j=0;j<4;j++) + { + memPtr->m_relPosition[0].m_floats[j] = 0.f; + memPtr->m_relPosition[1].m_floats[j] = 0.f; + } + memPtr->m_bodyA = 0; + memPtr->m_bodyB = 0; + if (m_joints[i]->m_bodies[0].m_soft) + { + memPtr->m_bodyAtype = BT_JOINT_SOFT_BODY_CLUSTER; + memPtr->m_bodyA = serializer->getUniquePointer((void*)m_joints[i]->m_bodies[0].m_soft); + } + if (m_joints[i]->m_bodies[0].m_collisionObject) + { + memPtr->m_bodyAtype = BT_JOINT_COLLISION_OBJECT; + memPtr->m_bodyA = serializer->getUniquePointer((void*)m_joints[i]->m_bodies[0].m_collisionObject); + } + if (m_joints[i]->m_bodies[0].m_rigid) + { + memPtr->m_bodyAtype = BT_JOINT_RIGID_BODY; + memPtr->m_bodyA = serializer->getUniquePointer((void*)m_joints[i]->m_bodies[0].m_rigid); + } + + if (m_joints[i]->m_bodies[1].m_soft) + { + memPtr->m_bodyBtype = BT_JOINT_SOFT_BODY_CLUSTER; + memPtr->m_bodyB = serializer->getUniquePointer((void*)m_joints[i]->m_bodies[1].m_soft); + } + if (m_joints[i]->m_bodies[1].m_collisionObject) + { + memPtr->m_bodyBtype = BT_JOINT_COLLISION_OBJECT; + memPtr->m_bodyB = serializer->getUniquePointer((void*)m_joints[i]->m_bodies[1].m_collisionObject); + } + if (m_joints[i]->m_bodies[1].m_rigid) + { + memPtr->m_bodyBtype = BT_JOINT_RIGID_BODY; + memPtr->m_bodyB = serializer->getUniquePointer((void*)m_joints[i]->m_bodies[1].m_rigid); + } + } + serializer->finalizeChunk(chunk,"btSoftBodyJointData",BT_ARRAY_CODE,(void*) &m_joints[0]); + } + + + return btSoftBodyDataName; +} + diff --git a/thirdparty/bullet/src/BulletSoftBody/btSoftBody.h b/thirdparty/bullet/src/BulletSoftBody/btSoftBody.h new file mode 100644 index 0000000000..ada0dfd1a5 --- /dev/null +++ b/thirdparty/bullet/src/BulletSoftBody/btSoftBody.h @@ -0,0 +1,1005 @@ +/* +Bullet Continuous Collision Detection and Physics Library +Copyright (c) 2003-2006 Erwin Coumans http://continuousphysics.com/Bullet/ + +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. +*/ +///btSoftBody implementation by Nathanael Presson + +#ifndef _BT_SOFT_BODY_H +#define _BT_SOFT_BODY_H + +#include "LinearMath/btAlignedObjectArray.h" +#include "LinearMath/btTransform.h" +#include "LinearMath/btIDebugDraw.h" +#include "BulletDynamics/Dynamics/btRigidBody.h" + +#include "BulletCollision/CollisionShapes/btConcaveShape.h" +#include "BulletCollision/CollisionDispatch/btCollisionCreateFunc.h" +#include "btSparseSDF.h" +#include "BulletCollision/BroadphaseCollision/btDbvt.h" + +//#ifdef BT_USE_DOUBLE_PRECISION +//#define btRigidBodyData btRigidBodyDoubleData +//#define btRigidBodyDataName "btRigidBodyDoubleData" +//#else +#define btSoftBodyData btSoftBodyFloatData +#define btSoftBodyDataName "btSoftBodyFloatData" +//#endif //BT_USE_DOUBLE_PRECISION + +class btBroadphaseInterface; +class btDispatcher; +class btSoftBodySolver; + +/* btSoftBodyWorldInfo */ +struct btSoftBodyWorldInfo +{ + btScalar air_density; + btScalar water_density; + btScalar water_offset; + btScalar m_maxDisplacement; + btVector3 water_normal; + btBroadphaseInterface* m_broadphase; + btDispatcher* m_dispatcher; + btVector3 m_gravity; + btSparseSdf<3> m_sparsesdf; + + btSoftBodyWorldInfo() + :air_density((btScalar)1.2), + water_density(0), + water_offset(0), + m_maxDisplacement(1000.f),//avoid soft body from 'exploding' so use some upper threshold of maximum motion that a node can travel per frame + water_normal(0,0,0), + m_broadphase(0), + m_dispatcher(0), + m_gravity(0,-10,0) + { + } +}; + + +///The btSoftBody is an class to simulate cloth and volumetric soft bodies. +///There is two-way interaction between btSoftBody and btRigidBody/btCollisionObject. +class btSoftBody : public btCollisionObject +{ +public: + btAlignedObjectArray<const class btCollisionObject*> m_collisionDisabledObjects; + + // The solver object that handles this soft body + btSoftBodySolver *m_softBodySolver; + + // + // Enumerations + // + + ///eAeroModel + struct eAeroModel { enum _ { + V_Point, ///Vertex normals are oriented toward velocity + V_TwoSided, ///Vertex normals are flipped to match velocity + V_TwoSidedLiftDrag, ///Vertex normals are flipped to match velocity and lift and drag forces are applied + V_OneSided, ///Vertex normals are taken as it is + F_TwoSided, ///Face normals are flipped to match velocity + F_TwoSidedLiftDrag, ///Face normals are flipped to match velocity and lift and drag forces are applied + F_OneSided, ///Face normals are taken as it is + END + };}; + + ///eVSolver : velocities solvers + struct eVSolver { enum _ { + Linear, ///Linear solver + END + };}; + + ///ePSolver : positions solvers + struct ePSolver { enum _ { + Linear, ///Linear solver + Anchors, ///Anchor solver + RContacts, ///Rigid contacts solver + SContacts, ///Soft contacts solver + END + };}; + + ///eSolverPresets + struct eSolverPresets { enum _ { + Positions, + Velocities, + Default = Positions, + END + };}; + + ///eFeature + struct eFeature { enum _ { + None, + Node, + Link, + Face, + Tetra, + END + };}; + + typedef btAlignedObjectArray<eVSolver::_> tVSolverArray; + typedef btAlignedObjectArray<ePSolver::_> tPSolverArray; + + // + // Flags + // + + ///fCollision + struct fCollision { enum _ { + RVSmask = 0x000f, ///Rigid versus soft mask + SDF_RS = 0x0001, ///SDF based rigid vs soft + CL_RS = 0x0002, ///Cluster vs convex rigid vs soft + + SVSmask = 0x0030, ///Rigid versus soft mask + VF_SS = 0x0010, ///Vertex vs face soft vs soft handling + CL_SS = 0x0020, ///Cluster vs cluster soft vs soft handling + CL_SELF = 0x0040, ///Cluster soft body self collision + /* presets */ + Default = SDF_RS, + END + };}; + + ///fMaterial + struct fMaterial { enum _ { + DebugDraw = 0x0001, /// Enable debug draw + /* presets */ + Default = DebugDraw, + END + };}; + + // + // API Types + // + + /* sRayCast */ + struct sRayCast + { + btSoftBody* body; /// soft body + eFeature::_ feature; /// feature type + int index; /// feature index + btScalar fraction; /// time of impact fraction (rayorg+(rayto-rayfrom)*fraction) + }; + + /* ImplicitFn */ + struct ImplicitFn + { + virtual ~ImplicitFn() {} + virtual btScalar Eval(const btVector3& x)=0; + }; + + // + // Internal types + // + + typedef btAlignedObjectArray<btScalar> tScalarArray; + typedef btAlignedObjectArray<btVector3> tVector3Array; + + /* sCti is Softbody contact info */ + struct sCti + { + const btCollisionObject* m_colObj; /* Rigid body */ + btVector3 m_normal; /* Outward normal */ + btScalar m_offset; /* Offset from origin */ + }; + + /* sMedium */ + struct sMedium + { + btVector3 m_velocity; /* Velocity */ + btScalar m_pressure; /* Pressure */ + btScalar m_density; /* Density */ + }; + + /* Base type */ + struct Element + { + void* m_tag; // User data + Element() : m_tag(0) {} + }; + /* Material */ + struct Material : Element + { + btScalar m_kLST; // Linear stiffness coefficient [0,1] + btScalar m_kAST; // Area/Angular stiffness coefficient [0,1] + btScalar m_kVST; // Volume stiffness coefficient [0,1] + int m_flags; // Flags + }; + + /* Feature */ + struct Feature : Element + { + Material* m_material; // Material + }; + /* Node */ + struct Node : Feature + { + btVector3 m_x; // Position + btVector3 m_q; // Previous step position + btVector3 m_v; // Velocity + btVector3 m_f; // Force accumulator + btVector3 m_n; // Normal + btScalar m_im; // 1/mass + btScalar m_area; // Area + btDbvtNode* m_leaf; // Leaf data + int m_battach:1; // Attached + }; + /* Link */ + ATTRIBUTE_ALIGNED16(struct) Link : Feature + { + btVector3 m_c3; // gradient + Node* m_n[2]; // Node pointers + btScalar m_rl; // Rest length + int m_bbending:1; // Bending link + btScalar m_c0; // (ima+imb)*kLST + btScalar m_c1; // rl^2 + btScalar m_c2; // |gradient|^2/c0 + + BT_DECLARE_ALIGNED_ALLOCATOR(); + + }; + /* Face */ + struct Face : Feature + { + Node* m_n[3]; // Node pointers + btVector3 m_normal; // Normal + btScalar m_ra; // Rest area + btDbvtNode* m_leaf; // Leaf data + }; + /* 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) + }; + /* RContact */ + struct RContact + { + sCti m_cti; // Contact infos + Node* m_node; // Owner node + btMatrix3x3 m_c0; // Impulse matrix + btVector3 m_c1; // Relative anchor + btScalar m_c2; // ima*dt + btScalar m_c3; // Friction + btScalar m_c4; // Hardness + }; + /* SContact */ + struct SContact + { + Node* m_node; // Node + Face* m_face; // Face + btVector3 m_weights; // Weigths + btVector3 m_normal; // Normal + btScalar m_margin; // Margin + btScalar m_friction; // Friction + btScalar m_cfm[2]; // Constraint force mixing + }; + /* Anchor */ + struct Anchor + { + Node* m_node; // Node pointer + btVector3 m_local; // Anchor position in body space + btRigidBody* m_body; // Body + btScalar m_influence; + btMatrix3x3 m_c0; // Impulse matrix + btVector3 m_c1; // Relative anchor + btScalar m_c2; // ima*dt + }; + /* Note */ + struct Note : Element + { + const char* m_text; // Text + btVector3 m_offset; // Offset + int m_rank; // Rank + Node* m_nodes[4]; // Nodes + btScalar m_coords[4]; // Coordinates + }; + /* Pose */ + struct Pose + { + bool m_bvolume; // Is valid + bool m_bframe; // Is frame + btScalar m_volume; // Rest volume + tVector3Array m_pos; // Reference positions + tScalarArray m_wgh; // Weights + btVector3 m_com; // COM + btMatrix3x3 m_rot; // Rotation + btMatrix3x3 m_scl; // Scale + btMatrix3x3 m_aqq; // Base scaling + }; + /* Cluster */ + struct Cluster + { + tScalarArray m_masses; + btAlignedObjectArray<Node*> m_nodes; + tVector3Array m_framerefs; + btTransform m_framexform; + btScalar m_idmass; + btScalar m_imass; + btMatrix3x3 m_locii; + btMatrix3x3 m_invwi; + btVector3 m_com; + btVector3 m_vimpulses[2]; + btVector3 m_dimpulses[2]; + int m_nvimpulses; + int m_ndimpulses; + btVector3 m_lv; + btVector3 m_av; + btDbvtNode* m_leaf; + btScalar m_ndamping; /* Node damping */ + btScalar m_ldamping; /* Linear damping */ + btScalar m_adamping; /* Angular damping */ + btScalar m_matching; + btScalar m_maxSelfCollisionImpulse; + btScalar m_selfCollisionImpulseFactor; + bool m_containsAnchor; + bool m_collide; + int m_clusterIndex; + Cluster() : m_leaf(0),m_ndamping(0),m_ldamping(0),m_adamping(0),m_matching(0) + ,m_maxSelfCollisionImpulse(100.f), + m_selfCollisionImpulseFactor(0.01f), + m_containsAnchor(false) + {} + }; + /* Impulse */ + struct Impulse + { + btVector3 m_velocity; + btVector3 m_drift; + int m_asVelocity:1; + int m_asDrift:1; + Impulse() : m_velocity(0,0,0),m_drift(0,0,0),m_asVelocity(0),m_asDrift(0) {} + Impulse operator -() const + { + Impulse i=*this; + i.m_velocity=-i.m_velocity; + i.m_drift=-i.m_drift; + return(i); + } + Impulse operator*(btScalar x) const + { + Impulse i=*this; + i.m_velocity*=x; + i.m_drift*=x; + return(i); + } + }; + /* Body */ + struct Body + { + Cluster* m_soft; + btRigidBody* m_rigid; + const btCollisionObject* m_collisionObject; + + Body() : m_soft(0),m_rigid(0),m_collisionObject(0) {} + Body(Cluster* p) : m_soft(p),m_rigid(0),m_collisionObject(0) {} + Body(const btCollisionObject* colObj) : m_soft(0),m_collisionObject(colObj) + { + m_rigid = (btRigidBody*)btRigidBody::upcast(m_collisionObject); + } + + void activate() const + { + if(m_rigid) + m_rigid->activate(); + if (m_collisionObject) + m_collisionObject->activate(); + + } + const btMatrix3x3& invWorldInertia() const + { + static const btMatrix3x3 iwi(0,0,0,0,0,0,0,0,0); + if(m_rigid) return(m_rigid->getInvInertiaTensorWorld()); + if(m_soft) return(m_soft->m_invwi); + return(iwi); + } + btScalar invMass() const + { + if(m_rigid) return(m_rigid->getInvMass()); + if(m_soft) return(m_soft->m_imass); + return(0); + } + const btTransform& xform() const + { + static const btTransform identity=btTransform::getIdentity(); + if(m_collisionObject) return(m_collisionObject->getWorldTransform()); + if(m_soft) return(m_soft->m_framexform); + return(identity); + } + btVector3 linearVelocity() const + { + if(m_rigid) return(m_rigid->getLinearVelocity()); + if(m_soft) return(m_soft->m_lv); + return(btVector3(0,0,0)); + } + btVector3 angularVelocity(const btVector3& rpos) const + { + if(m_rigid) return(btCross(m_rigid->getAngularVelocity(),rpos)); + if(m_soft) return(btCross(m_soft->m_av,rpos)); + return(btVector3(0,0,0)); + } + btVector3 angularVelocity() const + { + if(m_rigid) return(m_rigid->getAngularVelocity()); + if(m_soft) return(m_soft->m_av); + return(btVector3(0,0,0)); + } + btVector3 velocity(const btVector3& rpos) const + { + return(linearVelocity()+angularVelocity(rpos)); + } + void applyVImpulse(const btVector3& impulse,const btVector3& rpos) const + { + if(m_rigid) m_rigid->applyImpulse(impulse,rpos); + if(m_soft) btSoftBody::clusterVImpulse(m_soft,rpos,impulse); + } + void applyDImpulse(const btVector3& impulse,const btVector3& rpos) const + { + if(m_rigid) m_rigid->applyImpulse(impulse,rpos); + if(m_soft) btSoftBody::clusterDImpulse(m_soft,rpos,impulse); + } + void applyImpulse(const Impulse& impulse,const btVector3& rpos) const + { + if(impulse.m_asVelocity) + { +// printf("impulse.m_velocity = %f,%f,%f\n",impulse.m_velocity.getX(),impulse.m_velocity.getY(),impulse.m_velocity.getZ()); + applyVImpulse(impulse.m_velocity,rpos); + } + if(impulse.m_asDrift) + { +// printf("impulse.m_drift = %f,%f,%f\n",impulse.m_drift.getX(),impulse.m_drift.getY(),impulse.m_drift.getZ()); + applyDImpulse(impulse.m_drift,rpos); + } + } + void applyVAImpulse(const btVector3& impulse) const + { + if(m_rigid) m_rigid->applyTorqueImpulse(impulse); + if(m_soft) btSoftBody::clusterVAImpulse(m_soft,impulse); + } + void applyDAImpulse(const btVector3& impulse) const + { + if(m_rigid) m_rigid->applyTorqueImpulse(impulse); + if(m_soft) btSoftBody::clusterDAImpulse(m_soft,impulse); + } + void applyAImpulse(const Impulse& impulse) const + { + if(impulse.m_asVelocity) applyVAImpulse(impulse.m_velocity); + if(impulse.m_asDrift) applyDAImpulse(impulse.m_drift); + } + void applyDCImpulse(const btVector3& impulse) const + { + if(m_rigid) m_rigid->applyCentralImpulse(impulse); + if(m_soft) btSoftBody::clusterDCImpulse(m_soft,impulse); + } + }; + /* Joint */ + struct Joint + { + struct eType { enum _ { + Linear=0, + Angular, + Contact + };}; + struct Specs + { + Specs() : erp(1),cfm(1),split(1) {} + btScalar erp; + btScalar cfm; + btScalar split; + }; + Body m_bodies[2]; + btVector3 m_refs[2]; + btScalar m_cfm; + btScalar m_erp; + btScalar m_split; + btVector3 m_drift; + btVector3 m_sdrift; + btMatrix3x3 m_massmatrix; + bool m_delete; + virtual ~Joint() {} + Joint() : m_delete(false) {} + virtual void Prepare(btScalar dt,int iterations); + virtual void Solve(btScalar dt,btScalar sor)=0; + virtual void Terminate(btScalar dt)=0; + virtual eType::_ Type() const=0; + }; + /* LJoint */ + struct LJoint : Joint + { + struct Specs : Joint::Specs + { + btVector3 position; + }; + btVector3 m_rpos[2]; + void Prepare(btScalar dt,int iterations); + void Solve(btScalar dt,btScalar sor); + void Terminate(btScalar dt); + eType::_ Type() const { return(eType::Linear); } + }; + /* AJoint */ + struct AJoint : Joint + { + struct IControl + { + virtual ~IControl() {} + virtual void Prepare(AJoint*) {} + virtual btScalar Speed(AJoint*,btScalar current) { return(current); } + static IControl* Default() { static IControl def;return(&def); } + }; + struct Specs : Joint::Specs + { + Specs() : icontrol(IControl::Default()) {} + btVector3 axis; + IControl* icontrol; + }; + btVector3 m_axis[2]; + IControl* m_icontrol; + void Prepare(btScalar dt,int iterations); + void Solve(btScalar dt,btScalar sor); + void Terminate(btScalar dt); + eType::_ Type() const { return(eType::Angular); } + }; + /* CJoint */ + struct CJoint : Joint + { + int m_life; + int m_maxlife; + btVector3 m_rpos[2]; + btVector3 m_normal; + btScalar m_friction; + void Prepare(btScalar dt,int iterations); + void Solve(btScalar dt,btScalar sor); + void Terminate(btScalar dt); + eType::_ Type() const { return(eType::Contact); } + }; + /* Config */ + struct Config + { + eAeroModel::_ aeromodel; // Aerodynamic model (default: V_Point) + btScalar kVCF; // Velocities correction factor (Baumgarte) + btScalar kDP; // Damping coefficient [0,1] + btScalar kDG; // Drag coefficient [0,+inf] + btScalar kLF; // Lift coefficient [0,+inf] + btScalar kPR; // Pressure coefficient [-inf,+inf] + btScalar kVC; // Volume conversation coefficient [0,+inf] + btScalar kDF; // Dynamic friction coefficient [0,1] + btScalar kMT; // Pose matching coefficient [0,1] + btScalar kCHR; // Rigid contacts hardness [0,1] + btScalar kKHR; // Kinetic contacts hardness [0,1] + btScalar kSHR; // Soft contacts hardness [0,1] + btScalar kAHR; // Anchors hardness [0,1] + btScalar kSRHR_CL; // Soft vs rigid hardness [0,1] (cluster only) + btScalar kSKHR_CL; // Soft vs kinetic hardness [0,1] (cluster only) + btScalar kSSHR_CL; // Soft vs soft hardness [0,1] (cluster only) + btScalar kSR_SPLT_CL; // Soft vs rigid impulse split [0,1] (cluster only) + btScalar kSK_SPLT_CL; // Soft vs rigid impulse split [0,1] (cluster only) + btScalar kSS_SPLT_CL; // Soft vs rigid impulse split [0,1] (cluster only) + btScalar maxvolume; // Maximum volume ratio for pose + btScalar timescale; // Time scale + int viterations; // Velocities solver iterations + int piterations; // Positions solver iterations + int diterations; // Drift solver iterations + int citerations; // Cluster solver iterations + int collisions; // Collisions flags + tVSolverArray m_vsequence; // Velocity solvers sequence + tPSolverArray m_psequence; // Position solvers sequence + tPSolverArray m_dsequence; // Drift solvers sequence + }; + /* SolverState */ + struct SolverState + { + btScalar sdt; // dt*timescale + btScalar isdt; // 1/sdt + btScalar velmrg; // velocity margin + btScalar radmrg; // radial margin + btScalar updmrg; // Update margin + }; + /// RayFromToCaster takes a ray from, ray to (instead of direction!) + struct RayFromToCaster : btDbvt::ICollide + { + btVector3 m_rayFrom; + btVector3 m_rayTo; + btVector3 m_rayNormalizedDirection; + btScalar m_mint; + Face* m_face; + int m_tests; + RayFromToCaster(const btVector3& rayFrom,const btVector3& rayTo,btScalar mxt); + void Process(const btDbvtNode* leaf); + + static /*inline*/ btScalar rayFromToTriangle(const btVector3& rayFrom, + const btVector3& rayTo, + const btVector3& rayNormalizedDirection, + const btVector3& a, + const btVector3& b, + const btVector3& c, + btScalar maxt=SIMD_INFINITY); + }; + + // + // Typedefs + // + + typedef void (*psolver_t)(btSoftBody*,btScalar,btScalar); + typedef void (*vsolver_t)(btSoftBody*,btScalar); + typedef btAlignedObjectArray<Cluster*> tClusterArray; + typedef btAlignedObjectArray<Note> tNoteArray; + typedef btAlignedObjectArray<Node> tNodeArray; + typedef btAlignedObjectArray<btDbvtNode*> tLeafArray; + typedef btAlignedObjectArray<Link> tLinkArray; + typedef btAlignedObjectArray<Face> tFaceArray; + typedef btAlignedObjectArray<Tetra> tTetraArray; + typedef btAlignedObjectArray<Anchor> tAnchorArray; + typedef btAlignedObjectArray<RContact> tRContactArray; + typedef btAlignedObjectArray<SContact> tSContactArray; + typedef btAlignedObjectArray<Material*> tMaterialArray; + typedef btAlignedObjectArray<Joint*> tJointArray; + typedef btAlignedObjectArray<btSoftBody*> tSoftBodyArray; + + // + // Fields + // + + Config m_cfg; // Configuration + SolverState m_sst; // Solver state + Pose m_pose; // Pose + void* m_tag; // User data + btSoftBodyWorldInfo* m_worldInfo; // World info + tNoteArray m_notes; // Notes + tNodeArray m_nodes; // Nodes + tLinkArray m_links; // Links + tFaceArray m_faces; // Faces + tTetraArray m_tetras; // Tetras + tAnchorArray m_anchors; // Anchors + tRContactArray m_rcontacts; // Rigid contacts + 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 + btDbvt m_cdbvt; // Clusters tree + tClusterArray m_clusters; // Clusters + + btAlignedObjectArray<bool>m_clusterConnectivity;//cluster connectivity, for self-collision + + btTransform m_initialWorldTransform; + + btVector3 m_windVelocity; + + btScalar m_restLengthScale; + + // + // Api + // + + /* ctor */ + btSoftBody( btSoftBodyWorldInfo* worldInfo,int node_count, const btVector3* x, const btScalar* m); + + /* ctor */ + btSoftBody( btSoftBodyWorldInfo* worldInfo); + + void initDefaults(); + + /* dtor */ + virtual ~btSoftBody(); + /* Check for existing link */ + + btAlignedObjectArray<int> m_userIndexMapping; + + btSoftBodyWorldInfo* getWorldInfo() + { + return m_worldInfo; + } + + ///@todo: avoid internal softbody shape hack and move collision code to collision library + virtual void setCollisionShape(btCollisionShape* collisionShape) + { + + } + + bool checkLink( int node0, + int node1) const; + bool checkLink( const Node* node0, + const Node* node1) const; + /* Check for existring face */ + bool checkFace( int node0, + int node1, + int node2) const; + /* Append material */ + Material* appendMaterial(); + /* Append note */ + void appendNote( const char* text, + const btVector3& o, + const btVector4& c=btVector4(1,0,0,0), + Node* n0=0, + Node* n1=0, + Node* n2=0, + Node* n3=0); + void appendNote( const char* text, + const btVector3& o, + Node* feature); + void appendNote( const char* text, + const btVector3& o, + Link* feature); + void appendNote( const char* text, + const btVector3& o, + Face* feature); + /* Append node */ + void appendNode( const btVector3& x,btScalar m); + /* Append link */ + void appendLink(int model=-1,Material* mat=0); + void appendLink( int node0, + int node1, + Material* mat=0, + bool bcheckexist=false); + void appendLink( Node* node0, + Node* node1, + Material* mat=0, + bool bcheckexist=false); + /* Append face */ + void appendFace(int model=-1,Material* mat=0); + void appendFace( int node0, + int node1, + int node2, + Material* mat=0); + void appendTetra(int model,Material* mat); + // + void appendTetra(int node0, + int node1, + int node2, + int node3, + Material* mat=0); + + + /* Append anchor */ + 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); + /* Append linear joint */ + void appendLinearJoint(const LJoint::Specs& specs,Cluster* body0,Body body1); + void appendLinearJoint(const LJoint::Specs& specs,Body body=Body()); + void appendLinearJoint(const LJoint::Specs& specs,btSoftBody* body); + /* Append linear joint */ + void appendAngularJoint(const AJoint::Specs& specs,Cluster* body0,Body body1); + void appendAngularJoint(const AJoint::Specs& specs,Body body=Body()); + void appendAngularJoint(const AJoint::Specs& specs,btSoftBody* body); + /* Add force (or gravity) to the entire body */ + void addForce( const btVector3& force); + /* Add force (or gravity) to a node of the body */ + void addForce( const btVector3& force, + int node); + /* Add aero force to a node of the body */ + void addAeroForceToNode(const btVector3& windVelocity,int nodeIndex); + + /* Add aero force to a face of the body */ + void addAeroForceToFace(const btVector3& windVelocity,int faceIndex); + + /* Add velocity to the entire body */ + void addVelocity( const btVector3& velocity); + + /* Set velocity for the entire body */ + void setVelocity( const btVector3& velocity); + + /* Add velocity to a node of the body */ + void addVelocity( const btVector3& velocity, + int node); + /* Set mass */ + void setMass( int node, + btScalar mass); + /* Get mass */ + btScalar getMass( int node) const; + /* Get total mass */ + btScalar getTotalMass() const; + /* Set total mass (weighted by previous masses) */ + void setTotalMass( btScalar mass, + bool fromfaces=false); + /* Set total density */ + void setTotalDensity(btScalar density); + /* Set volume mass (using tetrahedrons) */ + void setVolumeMass( btScalar mass); + /* Set volume density (using tetrahedrons) */ + void setVolumeDensity( btScalar density); + /* Transform */ + void transform( const btTransform& trs); + /* Translate */ + void translate( const btVector3& trs); + /* Rotate */ + void rotate( const btQuaternion& rot); + /* Scale */ + void scale( const btVector3& scl); + /* Get link resting lengths scale */ + btScalar getRestLengthScale(); + /* Scale resting length of all springs */ + void setRestLengthScale(btScalar restLength); + /* Set current state as pose */ + void setPose( bool bvolume, + bool bframe); + /* Set current link lengths as resting lengths */ + void resetLinkRestLengths(); + /* Return the volume */ + btScalar getVolume() const; + /* Cluster count */ + int clusterCount() const; + /* Cluster center of mass */ + static btVector3 clusterCom(const Cluster* cluster); + btVector3 clusterCom(int cluster) const; + /* Cluster velocity at rpos */ + static btVector3 clusterVelocity(const Cluster* cluster,const btVector3& rpos); + /* Cluster impulse */ + static void clusterVImpulse(Cluster* cluster,const btVector3& rpos,const btVector3& impulse); + static void clusterDImpulse(Cluster* cluster,const btVector3& rpos,const btVector3& impulse); + static void clusterImpulse(Cluster* cluster,const btVector3& rpos,const Impulse& impulse); + static void clusterVAImpulse(Cluster* cluster,const btVector3& impulse); + static void clusterDAImpulse(Cluster* cluster,const btVector3& impulse); + static void clusterAImpulse(Cluster* cluster,const Impulse& impulse); + static void clusterDCImpulse(Cluster* cluster,const btVector3& impulse); + /* Generate bending constraints based on distance in the adjency graph */ + int generateBendingConstraints( int distance, + Material* mat=0); + /* Randomize constraints to reduce solver bias */ + void randomizeConstraints(); + /* Release clusters */ + void releaseCluster(int index); + void releaseClusters(); + /* Generate clusters (K-mean) */ + ///generateClusters with k=0 will create a convex cluster for each tetrahedron or triangle + ///otherwise an approximation will be used (better performance) + int generateClusters(int k,int maxiterations=8192); + /* Refine */ + void refine(ImplicitFn* ifn,btScalar accurary,bool cut); + /* CutLink */ + bool cutLink(int node0,int node1,btScalar position); + bool cutLink(const Node* node0,const Node* node1,btScalar position); + + ///Ray casting using rayFrom and rayTo in worldspace, (not direction!) + bool rayTest(const btVector3& rayFrom, + const btVector3& rayTo, + sRayCast& results); + /* Solver presets */ + void setSolver(eSolverPresets::_ preset); + /* predictMotion */ + void predictMotion(btScalar dt); + /* solveConstraints */ + void solveConstraints(); + /* staticSolve */ + void staticSolve(int iterations); + /* solveCommonConstraints */ + static void solveCommonConstraints(btSoftBody** bodies,int count,int iterations); + /* solveClusters */ + static void solveClusters(const btAlignedObjectArray<btSoftBody*>& bodies); + /* integrateMotion */ + void integrateMotion(); + /* defaultCollisionHandlers */ + void defaultCollisionHandler(const btCollisionObjectWrapper* pcoWrap); + void defaultCollisionHandler(btSoftBody* psb); + + + + // + // Functionality to deal with new accelerated solvers. + // + + /** + * Set a wind velocity for interaction with the air. + */ + void setWindVelocity( const btVector3 &velocity ); + + + /** + * Return the wind velocity for interaction with the air. + */ + const btVector3& getWindVelocity(); + + // + // Set the solver that handles this soft body + // Should not be allowed to get out of sync with reality + // Currently called internally on addition to the world + void setSoftBodySolver( btSoftBodySolver *softBodySolver ) + { + m_softBodySolver = softBodySolver; + } + + // + // Return the solver that handles this soft body + // + btSoftBodySolver *getSoftBodySolver() + { + return m_softBodySolver; + } + + // + // Return the solver that handles this soft body + // + btSoftBodySolver *getSoftBodySolver() const + { + return m_softBodySolver; + } + + + // + // Cast + // + + static const btSoftBody* upcast(const btCollisionObject* colObj) + { + if (colObj->getInternalType()==CO_SOFT_BODY) + return (const btSoftBody*)colObj; + return 0; + } + static btSoftBody* upcast(btCollisionObject* colObj) + { + if (colObj->getInternalType()==CO_SOFT_BODY) + return (btSoftBody*)colObj; + return 0; + } + + // + // ::btCollisionObject + // + + virtual void getAabb(btVector3& aabbMin,btVector3& aabbMax) const + { + aabbMin = m_bounds[0]; + aabbMax = m_bounds[1]; + } + // + // Private + // + void pointersToIndices(); + void indicesToPointers(const int* map=0); + + int rayTest(const btVector3& rayFrom,const btVector3& rayTo, + btScalar& mint,eFeature::_& feature,int& index,bool bcountonly) const; + void initializeFaceTree(); + btVector3 evaluateCom() const; + bool checkContact(const btCollisionObjectWrapper* colObjWrap,const btVector3& x,btScalar margin,btSoftBody::sCti& cti) const; + void updateNormals(); + void updateBounds(); + void updatePose(); + void updateConstants(); + void updateLinkConstants(); + void updateArea(bool averageArea = true); + void initializeClusters(); + void updateClusters(); + void cleanupClusters(); + void prepareClusters(int iterations); + void solveClusters(btScalar sor); + void applyClusters(bool drift); + void dampClusters(); + void applyForces(); + 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); + static void PSolve_Links(btSoftBody* psb,btScalar kst,btScalar ti); + static void VSolve_Links(btSoftBody* psb,btScalar kst); + static psolver_t getSolver(ePSolver::_ solver); + static vsolver_t getSolver(eVSolver::_ solver); + + + 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; + + //virtual void serializeSingleObject(class btSerializer* serializer) const; + + +}; + + + + +#endif //_BT_SOFT_BODY_H diff --git a/thirdparty/bullet/src/BulletSoftBody/btSoftBodyConcaveCollisionAlgorithm.cpp b/thirdparty/bullet/src/BulletSoftBody/btSoftBodyConcaveCollisionAlgorithm.cpp new file mode 100644 index 0000000000..ab84bddf2a --- /dev/null +++ b/thirdparty/bullet/src/BulletSoftBody/btSoftBodyConcaveCollisionAlgorithm.cpp @@ -0,0 +1,358 @@ +/* +Bullet Continuous Collision Detection and Physics Library +Copyright (c) 2003-2006 Erwin Coumans http://continuousphysics.com/Bullet/ + +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. +*/ + + +#include "btSoftBodyConcaveCollisionAlgorithm.h" +#include "BulletCollision/CollisionDispatch/btCollisionObject.h" +#include "BulletCollision/CollisionShapes/btMultiSphereShape.h" +#include "BulletCollision/BroadphaseCollision/btBroadphaseProxy.h" +#include "BulletCollision/CollisionShapes/btConcaveShape.h" +#include "BulletCollision/CollisionDispatch/btManifoldResult.h" +#include "BulletCollision/NarrowPhaseCollision/btRaycastCallback.h" +#include "BulletCollision/CollisionShapes/btTriangleShape.h" +#include "BulletCollision/CollisionShapes/btSphereShape.h" +#include "BulletCollision/CollisionShapes/btTetrahedronShape.h" +#include "BulletCollision/CollisionShapes/btConvexHullShape.h" +#include "BulletCollision/CollisionDispatch/btCollisionObjectWrapper.h" + + +#include "LinearMath/btIDebugDraw.h" +#include "BulletCollision/NarrowPhaseCollision/btSubSimplexConvexCast.h" +#include "BulletSoftBody/btSoftBody.h" + +#define BT_SOFTBODY_TRIANGLE_EXTRUSION btScalar(0.06)//make this configurable + +btSoftBodyConcaveCollisionAlgorithm::btSoftBodyConcaveCollisionAlgorithm( const btCollisionAlgorithmConstructionInfo& ci, const btCollisionObjectWrapper* body0Wrap,const btCollisionObjectWrapper* body1Wrap,bool isSwapped) +: btCollisionAlgorithm(ci), +m_isSwapped(isSwapped), +m_btSoftBodyTriangleCallback(ci.m_dispatcher1,body0Wrap,body1Wrap,isSwapped) +{ +} + + + +btSoftBodyConcaveCollisionAlgorithm::~btSoftBodyConcaveCollisionAlgorithm() +{ +} + + + +btSoftBodyTriangleCallback::btSoftBodyTriangleCallback(btDispatcher* dispatcher,const btCollisionObjectWrapper* body0Wrap,const btCollisionObjectWrapper* body1Wrap,bool isSwapped): +m_dispatcher(dispatcher), +m_dispatchInfoPtr(0) +{ + m_softBody = (isSwapped? (btSoftBody*)body1Wrap->getCollisionObject():(btSoftBody*)body0Wrap->getCollisionObject()); + m_triBody = isSwapped? body0Wrap->getCollisionObject():body1Wrap->getCollisionObject(); + + // + // create the manifold from the dispatcher 'manifold pool' + // + // m_manifoldPtr = m_dispatcher->getNewManifold(m_convexBody,m_triBody); + + clearCache(); +} + +btSoftBodyTriangleCallback::~btSoftBodyTriangleCallback() +{ + clearCache(); + // m_dispatcher->releaseManifold( m_manifoldPtr ); + +} + + +void btSoftBodyTriangleCallback::clearCache() +{ + for (int i=0;i<m_shapeCache.size();i++) + { + btTriIndex* tmp = m_shapeCache.getAtIndex(i); + btAssert(tmp); + btAssert(tmp->m_childShape); + m_softBody->getWorldInfo()->m_sparsesdf.RemoveReferences(tmp->m_childShape);//necessary? + delete tmp->m_childShape; + } + m_shapeCache.clear(); +} + + +void btSoftBodyTriangleCallback::processTriangle(btVector3* triangle,int partId, int triangleIndex) +{ + //just for debugging purposes + //printf("triangle %d",m_triangleCount++); + + btCollisionAlgorithmConstructionInfo ci; + ci.m_dispatcher1 = m_dispatcher; + + ///debug drawing of the overlapping triangles + if (m_dispatchInfoPtr && m_dispatchInfoPtr->m_debugDraw && (m_dispatchInfoPtr->m_debugDraw->getDebugMode() &btIDebugDraw::DBG_DrawWireframe)) + { + btVector3 color(1,1,0); + const btTransform& tr = m_triBody->getWorldTransform(); + m_dispatchInfoPtr->m_debugDraw->drawLine(tr(triangle[0]),tr(triangle[1]),color); + m_dispatchInfoPtr->m_debugDraw->drawLine(tr(triangle[1]),tr(triangle[2]),color); + m_dispatchInfoPtr->m_debugDraw->drawLine(tr(triangle[2]),tr(triangle[0]),color); + } + + btTriIndex triIndex(partId,triangleIndex,0); + btHashKey<btTriIndex> triKey(triIndex.getUid()); + + + btTriIndex* shapeIndex = m_shapeCache[triKey]; + if (shapeIndex) + { + btCollisionShape* tm = shapeIndex->m_childShape; + btAssert(tm); + + //copy over user pointers to temporary shape + tm->setUserPointer(m_triBody->getCollisionShape()->getUserPointer()); + + btCollisionObjectWrapper softBody(0,m_softBody->getCollisionShape(),m_softBody,m_softBody->getWorldTransform(),-1,-1); + //btCollisionObjectWrapper triBody(0,tm, ob, btTransform::getIdentity());//ob->getWorldTransform());//?? + btCollisionObjectWrapper triBody(0,tm, m_triBody, m_triBody->getWorldTransform(),partId, triangleIndex); + ebtDispatcherQueryType algoType = m_resultOut->m_closestPointDistanceThreshold > 0 ? BT_CLOSEST_POINT_ALGORITHMS : BT_CONTACT_POINT_ALGORITHMS; + btCollisionAlgorithm* colAlgo = ci.m_dispatcher1->findAlgorithm(&softBody,&triBody,0, algoType);//m_manifoldPtr); + + colAlgo->processCollision(&softBody,&triBody,*m_dispatchInfoPtr,m_resultOut); + colAlgo->~btCollisionAlgorithm(); + ci.m_dispatcher1->freeCollisionAlgorithm(colAlgo); + + return; + } + + //aabb filter is already applied! + + //btCollisionObject* colObj = static_cast<btCollisionObject*>(m_convexProxy->m_clientObject); + + // if (m_softBody->getCollisionShape()->getShapeType()== + { + // btVector3 other; + btVector3 normal = (triangle[1]-triangle[0]).cross(triangle[2]-triangle[0]); + normal.normalize(); + normal*= BT_SOFTBODY_TRIANGLE_EXTRUSION; + // other=(triangle[0]+triangle[1]+triangle[2])*0.333333f; + // other+=normal*22.f; + btVector3 pts[6] = {triangle[0]+normal, + triangle[1]+normal, + triangle[2]+normal, + triangle[0]-normal, + triangle[1]-normal, + triangle[2]-normal}; + + btConvexHullShape* tm = new btConvexHullShape(&pts[0].getX(),6); + + + // btBU_Simplex1to4 tm(triangle[0],triangle[1],triangle[2],other); + + //btTriangleShape tm(triangle[0],triangle[1],triangle[2]); + // tm.setMargin(m_collisionMarginTriangle); + + //copy over user pointers to temporary shape + tm->setUserPointer(m_triBody->getCollisionShape()->getUserPointer()); + + + btCollisionObjectWrapper softBody(0,m_softBody->getCollisionShape(),m_softBody,m_softBody->getWorldTransform(),-1,-1); + btCollisionObjectWrapper triBody(0,tm, m_triBody, m_triBody->getWorldTransform(),partId, triangleIndex);//btTransform::getIdentity());//?? + + ebtDispatcherQueryType algoType = m_resultOut->m_closestPointDistanceThreshold > 0 ? BT_CLOSEST_POINT_ALGORITHMS : BT_CONTACT_POINT_ALGORITHMS; + btCollisionAlgorithm* colAlgo = ci.m_dispatcher1->findAlgorithm(&softBody,&triBody,0, algoType);//m_manifoldPtr); + + colAlgo->processCollision(&softBody,&triBody,*m_dispatchInfoPtr,m_resultOut); + colAlgo->~btCollisionAlgorithm(); + ci.m_dispatcher1->freeCollisionAlgorithm(colAlgo); + + triIndex.m_childShape = tm; + m_shapeCache.insert(triKey,triIndex); + + } + + + +} + + + +void btSoftBodyTriangleCallback::setTimeStepAndCounters(btScalar collisionMarginTriangle,const btCollisionObjectWrapper* triBodyWrap, const btDispatcherInfo& dispatchInfo,btManifoldResult* resultOut) +{ + m_dispatchInfoPtr = &dispatchInfo; + m_collisionMarginTriangle = collisionMarginTriangle+btScalar(BT_SOFTBODY_TRIANGLE_EXTRUSION); + m_resultOut = resultOut; + + + btVector3 aabbWorldSpaceMin,aabbWorldSpaceMax; + m_softBody->getAabb(aabbWorldSpaceMin,aabbWorldSpaceMax); + btVector3 halfExtents = (aabbWorldSpaceMax-aabbWorldSpaceMin)*btScalar(0.5); + btVector3 softBodyCenter = (aabbWorldSpaceMax+aabbWorldSpaceMin)*btScalar(0.5); + + btTransform softTransform; + softTransform.setIdentity(); + softTransform.setOrigin(softBodyCenter); + + btTransform convexInTriangleSpace; + convexInTriangleSpace = triBodyWrap->getWorldTransform().inverse() * softTransform; + btTransformAabb(halfExtents,m_collisionMarginTriangle,convexInTriangleSpace,m_aabbMin,m_aabbMax); +} + +void btSoftBodyConcaveCollisionAlgorithm::clearCache() +{ + m_btSoftBodyTriangleCallback.clearCache(); + +} + +void btSoftBodyConcaveCollisionAlgorithm::processCollision (const btCollisionObjectWrapper* body0Wrap,const btCollisionObjectWrapper* body1Wrap,const btDispatcherInfo& dispatchInfo,btManifoldResult* resultOut) +{ + + + //btCollisionObject* convexBody = m_isSwapped ? body1 : body0; + const btCollisionObjectWrapper* triBody = m_isSwapped ? body0Wrap : body1Wrap; + + if (triBody->getCollisionShape()->isConcave()) + { + + + const btCollisionObject* triOb = triBody->getCollisionObject(); + const btConcaveShape* concaveShape = static_cast<const btConcaveShape*>( triOb->getCollisionShape()); + + // if (convexBody->getCollisionShape()->isConvex()) + { + btScalar collisionMarginTriangle = concaveShape->getMargin(); + + // resultOut->setPersistentManifold(m_btSoftBodyTriangleCallback.m_manifoldPtr); + m_btSoftBodyTriangleCallback.setTimeStepAndCounters(collisionMarginTriangle,triBody,dispatchInfo,resultOut); + + + concaveShape->processAllTriangles( &m_btSoftBodyTriangleCallback,m_btSoftBodyTriangleCallback.getAabbMin(),m_btSoftBodyTriangleCallback.getAabbMax()); + + // resultOut->refreshContactPoints(); + + } + + } + +} + + +btScalar btSoftBodyConcaveCollisionAlgorithm::calculateTimeOfImpact(btCollisionObject* body0,btCollisionObject* body1,const btDispatcherInfo& dispatchInfo,btManifoldResult* resultOut) +{ + (void)resultOut; + (void)dispatchInfo; + btCollisionObject* convexbody = m_isSwapped ? body1 : body0; + btCollisionObject* triBody = m_isSwapped ? body0 : body1; + + + //quick approximation using raycast, todo: hook up to the continuous collision detection (one of the btConvexCast) + + //only perform CCD above a certain threshold, this prevents blocking on the long run + //because object in a blocked ccd state (hitfraction<1) get their linear velocity halved each frame... + btScalar squareMot0 = (convexbody->getInterpolationWorldTransform().getOrigin() - convexbody->getWorldTransform().getOrigin()).length2(); + if (squareMot0 < convexbody->getCcdSquareMotionThreshold()) + { + return btScalar(1.); + } + + //const btVector3& from = convexbody->m_worldTransform.getOrigin(); + //btVector3 to = convexbody->m_interpolationWorldTransform.getOrigin(); + //todo: only do if the motion exceeds the 'radius' + + btTransform triInv = triBody->getWorldTransform().inverse(); + btTransform convexFromLocal = triInv * convexbody->getWorldTransform(); + btTransform convexToLocal = triInv * convexbody->getInterpolationWorldTransform(); + + struct LocalTriangleSphereCastCallback : public btTriangleCallback + { + btTransform m_ccdSphereFromTrans; + btTransform m_ccdSphereToTrans; + btTransform m_meshTransform; + + btScalar m_ccdSphereRadius; + btScalar m_hitFraction; + + + LocalTriangleSphereCastCallback(const btTransform& from,const btTransform& to,btScalar ccdSphereRadius,btScalar hitFraction) + :m_ccdSphereFromTrans(from), + m_ccdSphereToTrans(to), + m_ccdSphereRadius(ccdSphereRadius), + m_hitFraction(hitFraction) + { + } + + + virtual void processTriangle(btVector3* triangle, int partId, int triangleIndex) + { + (void)partId; + (void)triangleIndex; + //do a swept sphere for now + btTransform ident; + ident.setIdentity(); + btConvexCast::CastResult castResult; + castResult.m_fraction = m_hitFraction; + btSphereShape pointShape(m_ccdSphereRadius); + btTriangleShape triShape(triangle[0],triangle[1],triangle[2]); + btVoronoiSimplexSolver simplexSolver; + btSubsimplexConvexCast convexCaster(&pointShape,&triShape,&simplexSolver); + //GjkConvexCast convexCaster(&pointShape,convexShape,&simplexSolver); + //ContinuousConvexCollision convexCaster(&pointShape,convexShape,&simplexSolver,0); + //local space? + + if (convexCaster.calcTimeOfImpact(m_ccdSphereFromTrans,m_ccdSphereToTrans, + ident,ident,castResult)) + { + if (m_hitFraction > castResult.m_fraction) + m_hitFraction = castResult.m_fraction; + } + + } + + }; + + + + + + if (triBody->getCollisionShape()->isConcave()) + { + btVector3 rayAabbMin = convexFromLocal.getOrigin(); + rayAabbMin.setMin(convexToLocal.getOrigin()); + btVector3 rayAabbMax = convexFromLocal.getOrigin(); + rayAabbMax.setMax(convexToLocal.getOrigin()); + btScalar ccdRadius0 = convexbody->getCcdSweptSphereRadius(); + rayAabbMin -= btVector3(ccdRadius0,ccdRadius0,ccdRadius0); + rayAabbMax += btVector3(ccdRadius0,ccdRadius0,ccdRadius0); + + btScalar curHitFraction = btScalar(1.); //is this available? + LocalTriangleSphereCastCallback raycastCallback(convexFromLocal,convexToLocal, + convexbody->getCcdSweptSphereRadius(),curHitFraction); + + raycastCallback.m_hitFraction = convexbody->getHitFraction(); + + btCollisionObject* concavebody = triBody; + + btConcaveShape* triangleMesh = (btConcaveShape*) concavebody->getCollisionShape(); + + if (triangleMesh) + { + triangleMesh->processAllTriangles(&raycastCallback,rayAabbMin,rayAabbMax); + } + + + + if (raycastCallback.m_hitFraction < convexbody->getHitFraction()) + { + convexbody->setHitFraction( raycastCallback.m_hitFraction); + return raycastCallback.m_hitFraction; + } + } + + return btScalar(1.); + +} diff --git a/thirdparty/bullet/src/BulletSoftBody/btSoftBodyConcaveCollisionAlgorithm.h b/thirdparty/bullet/src/BulletSoftBody/btSoftBodyConcaveCollisionAlgorithm.h new file mode 100644 index 0000000000..11c7b88f98 --- /dev/null +++ b/thirdparty/bullet/src/BulletSoftBody/btSoftBodyConcaveCollisionAlgorithm.h @@ -0,0 +1,155 @@ +/* +Bullet Continuous Collision Detection and Physics Library +Copyright (c) 2003-2006 Erwin Coumans http://continuousphysics.com/Bullet/ + +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_SOFT_BODY_CONCAVE_COLLISION_ALGORITHM_H +#define BT_SOFT_BODY_CONCAVE_COLLISION_ALGORITHM_H + +#include "BulletCollision/BroadphaseCollision/btCollisionAlgorithm.h" +#include "BulletCollision/BroadphaseCollision/btDispatcher.h" +#include "BulletCollision/BroadphaseCollision/btBroadphaseInterface.h" +#include "BulletCollision/CollisionShapes/btTriangleCallback.h" +#include "BulletCollision/NarrowPhaseCollision/btPersistentManifold.h" +class btDispatcher; +#include "BulletCollision/BroadphaseCollision/btBroadphaseProxy.h" +#include "BulletCollision/CollisionDispatch/btCollisionCreateFunc.h" +class btSoftBody; +class btCollisionShape; + +#include "LinearMath/btHashMap.h" + +#include "BulletCollision/BroadphaseCollision/btQuantizedBvh.h" //for definition of MAX_NUM_PARTS_IN_BITS + +struct btTriIndex +{ + int m_PartIdTriangleIndex; + class btCollisionShape* m_childShape; + + btTriIndex(int partId,int triangleIndex,btCollisionShape* shape) + { + m_PartIdTriangleIndex = (partId<<(31-MAX_NUM_PARTS_IN_BITS)) | triangleIndex; + m_childShape = shape; + } + + int getTriangleIndex() const + { + // Get only the lower bits where the triangle index is stored + unsigned int x = 0; + unsigned int y = (~(x&0))<<(31-MAX_NUM_PARTS_IN_BITS); + return (m_PartIdTriangleIndex&~(y)); + } + int getPartId() const + { + // Get only the highest bits where the part index is stored + return (m_PartIdTriangleIndex>>(31-MAX_NUM_PARTS_IN_BITS)); + } + int getUid() const + { + return m_PartIdTriangleIndex; + } +}; + + +///For each triangle in the concave mesh that overlaps with the AABB of a soft body (m_softBody), processTriangle is called. +class btSoftBodyTriangleCallback : public btTriangleCallback +{ + btSoftBody* m_softBody; + const btCollisionObject* m_triBody; + + btVector3 m_aabbMin; + btVector3 m_aabbMax ; + + btManifoldResult* m_resultOut; + + btDispatcher* m_dispatcher; + const btDispatcherInfo* m_dispatchInfoPtr; + btScalar m_collisionMarginTriangle; + + btHashMap<btHashKey<btTriIndex>,btTriIndex> m_shapeCache; + +public: + int m_triangleCount; + + // btPersistentManifold* m_manifoldPtr; + + btSoftBodyTriangleCallback(btDispatcher* dispatcher,const btCollisionObjectWrapper* body0Wrap,const btCollisionObjectWrapper* body1Wrap,bool isSwapped); + + void setTimeStepAndCounters(btScalar collisionMarginTriangle,const btCollisionObjectWrapper* triObjWrap,const btDispatcherInfo& dispatchInfo,btManifoldResult* resultOut); + + virtual ~btSoftBodyTriangleCallback(); + + virtual void processTriangle(btVector3* triangle, int partId, int triangleIndex); + + void clearCache(); + + SIMD_FORCE_INLINE const btVector3& getAabbMin() const + { + return m_aabbMin; + } + SIMD_FORCE_INLINE const btVector3& getAabbMax() const + { + return m_aabbMax; + } + +}; + + + + +/// btSoftBodyConcaveCollisionAlgorithm supports collision between soft body shapes and (concave) trianges meshes. +class btSoftBodyConcaveCollisionAlgorithm : public btCollisionAlgorithm +{ + + bool m_isSwapped; + + btSoftBodyTriangleCallback m_btSoftBodyTriangleCallback; + +public: + + btSoftBodyConcaveCollisionAlgorithm( const btCollisionAlgorithmConstructionInfo& ci,const btCollisionObjectWrapper* body0Wrap,const btCollisionObjectWrapper* body1Wrap,bool isSwapped); + + virtual ~btSoftBodyConcaveCollisionAlgorithm(); + + virtual void processCollision (const btCollisionObjectWrapper* body0Wrap,const btCollisionObjectWrapper* body1Wrap,const btDispatcherInfo& dispatchInfo,btManifoldResult* resultOut); + + btScalar calculateTimeOfImpact(btCollisionObject* body0,btCollisionObject* body1,const btDispatcherInfo& dispatchInfo,btManifoldResult* resultOut); + + virtual void getAllContactManifolds(btManifoldArray& manifoldArray) + { + //we don't add any manifolds + } + + void clearCache(); + + struct CreateFunc :public btCollisionAlgorithmCreateFunc + { + virtual btCollisionAlgorithm* CreateCollisionAlgorithm(btCollisionAlgorithmConstructionInfo& ci, const btCollisionObjectWrapper* body0Wrap,const btCollisionObjectWrapper* body1Wrap) + { + void* mem = ci.m_dispatcher1->allocateCollisionAlgorithm(sizeof(btSoftBodyConcaveCollisionAlgorithm)); + return new(mem) btSoftBodyConcaveCollisionAlgorithm(ci,body0Wrap,body1Wrap,false); + } + }; + + struct SwappedCreateFunc :public btCollisionAlgorithmCreateFunc + { + virtual btCollisionAlgorithm* CreateCollisionAlgorithm(btCollisionAlgorithmConstructionInfo& ci, const btCollisionObjectWrapper* body0Wrap,const btCollisionObjectWrapper* body1Wrap) + { + void* mem = ci.m_dispatcher1->allocateCollisionAlgorithm(sizeof(btSoftBodyConcaveCollisionAlgorithm)); + return new(mem) btSoftBodyConcaveCollisionAlgorithm(ci,body0Wrap,body1Wrap,true); + } + }; + +}; + +#endif //BT_SOFT_BODY_CONCAVE_COLLISION_ALGORITHM_H diff --git a/thirdparty/bullet/src/BulletSoftBody/btSoftBodyData.h b/thirdparty/bullet/src/BulletSoftBody/btSoftBodyData.h new file mode 100644 index 0000000000..87d8841cfa --- /dev/null +++ b/thirdparty/bullet/src/BulletSoftBody/btSoftBodyData.h @@ -0,0 +1,217 @@ +/* +Bullet Continuous Collision Detection and Physics Library +Copyright (c) 2003-2006 Erwin Coumans http://continuousphysics.com/Bullet/ + +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_SOFTBODY_FLOAT_DATA +#define BT_SOFTBODY_FLOAT_DATA + +#include "BulletCollision/CollisionDispatch/btCollisionObject.h" +#include "BulletDynamics/Dynamics/btRigidBody.h" + + +struct SoftBodyMaterialData +{ + float m_linearStiffness; + float m_angularStiffness; + float m_volumeStiffness; + int m_flags; +}; + +struct SoftBodyNodeData +{ + SoftBodyMaterialData *m_material; + btVector3FloatData m_position; + btVector3FloatData m_previousPosition; + btVector3FloatData m_velocity; + btVector3FloatData m_accumulatedForce; + btVector3FloatData m_normal; + float m_inverseMass; + float m_area; + int m_attach; + int m_pad; +}; + +struct SoftBodyLinkData +{ + SoftBodyMaterialData *m_material; + int m_nodeIndices[2]; // Node pointers + float m_restLength; // Rest length + int m_bbending; // Bending link +}; + +struct SoftBodyFaceData +{ + btVector3FloatData m_normal; // Normal + SoftBodyMaterialData *m_material; + int m_nodeIndices[3]; // Node pointers + float m_restArea; // Rest area +}; + +struct SoftBodyTetraData +{ + btVector3FloatData m_c0[4]; // gradients + SoftBodyMaterialData *m_material; + int m_nodeIndices[4]; // Node pointers + float m_restVolume; // Rest volume + float m_c1; // (4*kVST)/(im0+im1+im2+im3) + float m_c2; // m_c1/sum(|g0..3|^2) + int m_pad; +}; + +struct SoftRigidAnchorData +{ + btMatrix3x3FloatData m_c0; // Impulse matrix + btVector3FloatData m_c1; // Relative anchor + btVector3FloatData m_localFrame; // Anchor position in body space + btRigidBodyData *m_rigidBody; + int m_nodeIndex; // Node pointer + float m_c2; // ima*dt +}; + + + +struct SoftBodyConfigData +{ + int m_aeroModel; // Aerodynamic model (default: V_Point) + float m_baumgarte; // Velocities correction factor (Baumgarte) + float m_damping; // Damping coefficient [0,1] + float m_drag; // Drag coefficient [0,+inf] + float m_lift; // Lift coefficient [0,+inf] + float m_pressure; // Pressure coefficient [-inf,+inf] + float m_volume; // Volume conversation coefficient [0,+inf] + float m_dynamicFriction; // Dynamic friction coefficient [0,1] + float m_poseMatch; // Pose matching coefficient [0,1] + float m_rigidContactHardness; // Rigid contacts hardness [0,1] + float m_kineticContactHardness; // Kinetic contacts hardness [0,1] + float m_softContactHardness; // Soft contacts hardness [0,1] + float m_anchorHardness; // Anchors hardness [0,1] + float m_softRigidClusterHardness; // Soft vs rigid hardness [0,1] (cluster only) + float m_softKineticClusterHardness; // Soft vs kinetic hardness [0,1] (cluster only) + float m_softSoftClusterHardness; // Soft vs soft hardness [0,1] (cluster only) + float m_softRigidClusterImpulseSplit; // Soft vs rigid impulse split [0,1] (cluster only) + float m_softKineticClusterImpulseSplit; // Soft vs rigid impulse split [0,1] (cluster only) + float m_softSoftClusterImpulseSplit; // Soft vs rigid impulse split [0,1] (cluster only) + float m_maxVolume; // Maximum volume ratio for pose + float m_timeScale; // Time scale + int m_velocityIterations; // Velocities solver iterations + int m_positionIterations; // Positions solver iterations + int m_driftIterations; // Drift solver iterations + int m_clusterIterations; // Cluster solver iterations + int m_collisionFlags; // Collisions flags +}; + +struct SoftBodyPoseData +{ + btMatrix3x3FloatData m_rot; // Rotation + btMatrix3x3FloatData m_scale; // Scale + btMatrix3x3FloatData m_aqq; // Base scaling + btVector3FloatData m_com; // COM + + btVector3FloatData *m_positions; // Reference positions + float *m_weights; // Weights + int m_numPositions; + int m_numWeigts; + + int m_bvolume; // Is valid + int m_bframe; // Is frame + float m_restVolume; // Rest volume + int m_pad; +}; + +struct SoftBodyClusterData +{ + btTransformFloatData m_framexform; + btMatrix3x3FloatData m_locii; + btMatrix3x3FloatData m_invwi; + btVector3FloatData m_com; + btVector3FloatData m_vimpulses[2]; + btVector3FloatData m_dimpulses[2]; + btVector3FloatData m_lv; + btVector3FloatData m_av; + + btVector3FloatData *m_framerefs; + int *m_nodeIndices; + float *m_masses; + + int m_numFrameRefs; + int m_numNodes; + int m_numMasses; + + float m_idmass; + float m_imass; + int m_nvimpulses; + int m_ndimpulses; + float m_ndamping; + float m_ldamping; + float m_adamping; + float m_matching; + float m_maxSelfCollisionImpulse; + float m_selfCollisionImpulseFactor; + int m_containsAnchor; + int m_collide; + int m_clusterIndex; +}; + + +enum btSoftJointBodyType +{ + BT_JOINT_SOFT_BODY_CLUSTER=1, + BT_JOINT_RIGID_BODY, + BT_JOINT_COLLISION_OBJECT +}; + +struct btSoftBodyJointData +{ + void *m_bodyA; + void *m_bodyB; + btVector3FloatData m_refs[2]; + float m_cfm; + float m_erp; + float m_split; + int m_delete; + btVector3FloatData m_relPosition[2];//linear + int m_bodyAtype; + int m_bodyBtype; + int m_jointType; + int m_pad; +}; + +///do not change those serialization structures, it requires an updated sBulletDNAstr/sBulletDNAstr64 +struct btSoftBodyFloatData +{ + btCollisionObjectFloatData m_collisionObjectData; + + SoftBodyPoseData *m_pose; + SoftBodyMaterialData **m_materials; + SoftBodyNodeData *m_nodes; + SoftBodyLinkData *m_links; + SoftBodyFaceData *m_faces; + SoftBodyTetraData *m_tetrahedra; + SoftRigidAnchorData *m_anchors; + SoftBodyClusterData *m_clusters; + btSoftBodyJointData *m_joints; + + int m_numMaterials; + int m_numNodes; + int m_numLinks; + int m_numFaces; + int m_numTetrahedra; + int m_numAnchors; + int m_numClusters; + int m_numJoints; + SoftBodyConfigData m_config; +}; + +#endif //BT_SOFTBODY_FLOAT_DATA + diff --git a/thirdparty/bullet/src/BulletSoftBody/btSoftBodyHelpers.cpp b/thirdparty/bullet/src/BulletSoftBody/btSoftBodyHelpers.cpp new file mode 100644 index 0000000000..51fcd16da4 --- /dev/null +++ b/thirdparty/bullet/src/BulletSoftBody/btSoftBodyHelpers.cpp @@ -0,0 +1,1219 @@ +/* +Bullet Continuous Collision Detection and Physics Library +Copyright (c) 2003-2006 Erwin Coumans http://continuousphysics.com/Bullet/ + +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. +*/ +///btSoftBodyHelpers.cpp by Nathanael Presson + +#include "btSoftBodyInternals.h" +#include <stdio.h> +#include <string.h> +#include "btSoftBodyHelpers.h" +#include "LinearMath/btConvexHull.h" +#include "LinearMath/btConvexHullComputer.h" + + +// +static void drawVertex( btIDebugDraw* idraw, + const btVector3& x,btScalar s,const btVector3& c) +{ + idraw->drawLine(x-btVector3(s,0,0),x+btVector3(s,0,0),c); + idraw->drawLine(x-btVector3(0,s,0),x+btVector3(0,s,0),c); + idraw->drawLine(x-btVector3(0,0,s),x+btVector3(0,0,s),c); +} + +// +static void drawBox( btIDebugDraw* idraw, + const btVector3& mins, + const btVector3& maxs, + const btVector3& color) +{ + const btVector3 c[]={ btVector3(mins.x(),mins.y(),mins.z()), + btVector3(maxs.x(),mins.y(),mins.z()), + btVector3(maxs.x(),maxs.y(),mins.z()), + btVector3(mins.x(),maxs.y(),mins.z()), + btVector3(mins.x(),mins.y(),maxs.z()), + btVector3(maxs.x(),mins.y(),maxs.z()), + btVector3(maxs.x(),maxs.y(),maxs.z()), + btVector3(mins.x(),maxs.y(),maxs.z())}; + idraw->drawLine(c[0],c[1],color);idraw->drawLine(c[1],c[2],color); + idraw->drawLine(c[2],c[3],color);idraw->drawLine(c[3],c[0],color); + idraw->drawLine(c[4],c[5],color);idraw->drawLine(c[5],c[6],color); + idraw->drawLine(c[6],c[7],color);idraw->drawLine(c[7],c[4],color); + idraw->drawLine(c[0],c[4],color);idraw->drawLine(c[1],c[5],color); + idraw->drawLine(c[2],c[6],color);idraw->drawLine(c[3],c[7],color); +} + +// +static void drawTree( btIDebugDraw* idraw, + const btDbvtNode* node, + int depth, + const btVector3& ncolor, + const btVector3& lcolor, + int mindepth, + int maxdepth) +{ + if(node) + { + if(node->isinternal()&&((depth<maxdepth)||(maxdepth<0))) + { + drawTree(idraw,node->childs[0],depth+1,ncolor,lcolor,mindepth,maxdepth); + drawTree(idraw,node->childs[1],depth+1,ncolor,lcolor,mindepth,maxdepth); + } + if(depth>=mindepth) + { + const btScalar scl=(btScalar)(node->isinternal()?1:1); + const btVector3 mi=node->volume.Center()-node->volume.Extents()*scl; + const btVector3 mx=node->volume.Center()+node->volume.Extents()*scl; + drawBox(idraw,mi,mx,node->isleaf()?lcolor:ncolor); + } + } +} + +// +template <typename T> +static inline T sum(const btAlignedObjectArray<T>& items) +{ + T v; + if(items.size()) + { + v=items[0]; + for(int i=1,ni=items.size();i<ni;++i) + { + v+=items[i]; + } + } + return(v); +} + +// +template <typename T,typename Q> +static inline void add(btAlignedObjectArray<T>& items,const Q& value) +{ + for(int i=0,ni=items.size();i<ni;++i) + { + items[i]+=value; + } +} + +// +template <typename T,typename Q> +static inline void mul(btAlignedObjectArray<T>& items,const Q& value) +{ + for(int i=0,ni=items.size();i<ni;++i) + { + items[i]*=value; + } +} + +// +template <typename T> +static inline T average(const btAlignedObjectArray<T>& items) +{ + const btScalar n=(btScalar)(items.size()>0?items.size():1); + return(sum(items)/n); +} + +#if 0 +// + inline static btScalar tetravolume(const btVector3& x0, + const btVector3& x1, + const btVector3& x2, + const btVector3& x3) +{ + const btVector3 a=x1-x0; + const btVector3 b=x2-x0; + const btVector3 c=x3-x0; + return(btDot(a,btCross(b,c))); +} +#endif + +// +#if 0 +static btVector3 stresscolor(btScalar stress) +{ + static const btVector3 spectrum[]= { btVector3(1,0,1), + btVector3(0,0,1), + btVector3(0,1,1), + btVector3(0,1,0), + btVector3(1,1,0), + btVector3(1,0,0), + btVector3(1,0,0)}; + static const int ncolors=sizeof(spectrum)/sizeof(spectrum[0])-1; + static const btScalar one=1; + stress=btMax<btScalar>(0,btMin<btScalar>(1,stress))*ncolors; + const int sel=(int)stress; + const btScalar frc=stress-sel; + return(spectrum[sel]+(spectrum[sel+1]-spectrum[sel])*frc); +} +#endif + +// +void btSoftBodyHelpers::Draw( btSoftBody* psb, + btIDebugDraw* idraw, + int drawflags) +{ + const btScalar scl=(btScalar)0.1; + const btScalar nscl=scl*5; + const btVector3 lcolor=btVector3(0,0,0); + const btVector3 ncolor=btVector3(1,1,1); + const btVector3 ccolor=btVector3(1,0,0); + int i,j,nj; + + /* Clusters */ + if(0!=(drawflags&fDrawFlags::Clusters)) + { + srand(1806); + for(i=0;i<psb->m_clusters.size();++i) + { + if(psb->m_clusters[i]->m_collide) + { + btVector3 color( rand()/(btScalar)RAND_MAX, + rand()/(btScalar)RAND_MAX, + rand()/(btScalar)RAND_MAX); + color=color.normalized()*0.75; + btAlignedObjectArray<btVector3> vertices; + vertices.resize(psb->m_clusters[i]->m_nodes.size()); + for(j=0,nj=vertices.size();j<nj;++j) + { + vertices[j]=psb->m_clusters[i]->m_nodes[j]->m_x; + } +#define USE_NEW_CONVEX_HULL_COMPUTER +#ifdef USE_NEW_CONVEX_HULL_COMPUTER + btConvexHullComputer computer; + int stride = sizeof(btVector3); + int count = vertices.size(); + btScalar shrink=0.f; + btScalar shrinkClamp=0.f; + computer.compute(&vertices[0].getX(),stride,count,shrink,shrinkClamp); + for (int i=0;i<computer.faces.size();i++) + { + + int face = computer.faces[i]; + //printf("face=%d\n",face); + const btConvexHullComputer::Edge* firstEdge = &computer.edges[face]; + const btConvexHullComputer::Edge* edge = firstEdge->getNextEdgeOfFace(); + + int v0 = firstEdge->getSourceVertex(); + int v1 = firstEdge->getTargetVertex(); + while (edge!=firstEdge) + { + int v2 = edge->getTargetVertex(); + idraw->drawTriangle(computer.vertices[v0],computer.vertices[v1],computer.vertices[v2],color,1); + edge = edge->getNextEdgeOfFace(); + v0=v1; + v1=v2; + }; + } +#else + + HullDesc hdsc(QF_TRIANGLES,vertices.size(),&vertices[0]); + HullResult hres; + HullLibrary hlib; + hdsc.mMaxVertices=vertices.size(); + hlib.CreateConvexHull(hdsc,hres); + const btVector3 center=average(hres.m_OutputVertices); + add(hres.m_OutputVertices,-center); + mul(hres.m_OutputVertices,(btScalar)1); + add(hres.m_OutputVertices,center); + for(j=0;j<(int)hres.mNumFaces;++j) + { + const int idx[]={hres.m_Indices[j*3+0],hres.m_Indices[j*3+1],hres.m_Indices[j*3+2]}; + idraw->drawTriangle(hres.m_OutputVertices[idx[0]], + hres.m_OutputVertices[idx[1]], + hres.m_OutputVertices[idx[2]], + color,1); + } + hlib.ReleaseResult(hres); +#endif + + } + /* Velocities */ +#if 0 + for(int j=0;j<psb->m_clusters[i].m_nodes.size();++j) + { + const btSoftBody::Cluster& c=psb->m_clusters[i]; + const btVector3 r=c.m_nodes[j]->m_x-c.m_com; + const btVector3 v=c.m_lv+btCross(c.m_av,r); + idraw->drawLine(c.m_nodes[j]->m_x,c.m_nodes[j]->m_x+v,btVector3(1,0,0)); + } +#endif + /* Frame */ + // btSoftBody::Cluster& c=*psb->m_clusters[i]; + // idraw->drawLine(c.m_com,c.m_framexform*btVector3(10,0,0),btVector3(1,0,0)); + // idraw->drawLine(c.m_com,c.m_framexform*btVector3(0,10,0),btVector3(0,1,0)); + // idraw->drawLine(c.m_com,c.m_framexform*btVector3(0,0,10),btVector3(0,0,1)); + } + } + else + { + /* Nodes */ + if(0!=(drawflags&fDrawFlags::Nodes)) + { + for(i=0;i<psb->m_nodes.size();++i) + { + const btSoftBody::Node& n=psb->m_nodes[i]; + if(0==(n.m_material->m_flags&btSoftBody::fMaterial::DebugDraw)) continue; + idraw->drawLine(n.m_x-btVector3(scl,0,0),n.m_x+btVector3(scl,0,0),btVector3(1,0,0)); + idraw->drawLine(n.m_x-btVector3(0,scl,0),n.m_x+btVector3(0,scl,0),btVector3(0,1,0)); + idraw->drawLine(n.m_x-btVector3(0,0,scl),n.m_x+btVector3(0,0,scl),btVector3(0,0,1)); + } + } + /* Links */ + if(0!=(drawflags&fDrawFlags::Links)) + { + for(i=0;i<psb->m_links.size();++i) + { + const btSoftBody::Link& l=psb->m_links[i]; + if(0==(l.m_material->m_flags&btSoftBody::fMaterial::DebugDraw)) continue; + idraw->drawLine(l.m_n[0]->m_x,l.m_n[1]->m_x,lcolor); + } + } + /* Normals */ + if(0!=(drawflags&fDrawFlags::Normals)) + { + for(i=0;i<psb->m_nodes.size();++i) + { + const btSoftBody::Node& n=psb->m_nodes[i]; + if(0==(n.m_material->m_flags&btSoftBody::fMaterial::DebugDraw)) continue; + const btVector3 d=n.m_n*nscl; + idraw->drawLine(n.m_x,n.m_x+d,ncolor); + idraw->drawLine(n.m_x,n.m_x-d,ncolor*0.5); + } + } + /* Contacts */ + if(0!=(drawflags&fDrawFlags::Contacts)) + { + static const btVector3 axis[]={btVector3(1,0,0), + btVector3(0,1,0), + btVector3(0,0,1)}; + for(i=0;i<psb->m_rcontacts.size();++i) + { + const btSoftBody::RContact& c=psb->m_rcontacts[i]; + const btVector3 o= c.m_node->m_x-c.m_cti.m_normal* + (btDot(c.m_node->m_x,c.m_cti.m_normal)+c.m_cti.m_offset); + const btVector3 x=btCross(c.m_cti.m_normal,axis[c.m_cti.m_normal.minAxis()]).normalized(); + const btVector3 y=btCross(x,c.m_cti.m_normal).normalized(); + idraw->drawLine(o-x*nscl,o+x*nscl,ccolor); + idraw->drawLine(o-y*nscl,o+y*nscl,ccolor); + idraw->drawLine(o,o+c.m_cti.m_normal*nscl*3,btVector3(1,1,0)); + } + } + /* Faces */ + if(0!=(drawflags&fDrawFlags::Faces)) + { + const btScalar scl=(btScalar)0.8; + const btScalar alp=(btScalar)1; + const btVector3 col(0,(btScalar)0.7,0); + for(i=0;i<psb->m_faces.size();++i) + { + const btSoftBody::Face& f=psb->m_faces[i]; + if(0==(f.m_material->m_flags&btSoftBody::fMaterial::DebugDraw)) continue; + const btVector3 x[]={f.m_n[0]->m_x,f.m_n[1]->m_x,f.m_n[2]->m_x}; + const btVector3 c=(x[0]+x[1]+x[2])/3; + idraw->drawTriangle((x[0]-c)*scl+c, + (x[1]-c)*scl+c, + (x[2]-c)*scl+c, + col,alp); + } + } + /* Tetras */ + if(0!=(drawflags&fDrawFlags::Tetras)) + { + const btScalar scl=(btScalar)0.8; + const btScalar alp=(btScalar)1; + const btVector3 col((btScalar)0.3,(btScalar)0.3,(btScalar)0.7); + for(int i=0;i<psb->m_tetras.size();++i) + { + const btSoftBody::Tetra& t=psb->m_tetras[i]; + if(0==(t.m_material->m_flags&btSoftBody::fMaterial::DebugDraw)) continue; + const btVector3 x[]={t.m_n[0]->m_x,t.m_n[1]->m_x,t.m_n[2]->m_x,t.m_n[3]->m_x}; + const btVector3 c=(x[0]+x[1]+x[2]+x[3])/4; + idraw->drawTriangle((x[0]-c)*scl+c,(x[1]-c)*scl+c,(x[2]-c)*scl+c,col,alp); + idraw->drawTriangle((x[0]-c)*scl+c,(x[1]-c)*scl+c,(x[3]-c)*scl+c,col,alp); + idraw->drawTriangle((x[1]-c)*scl+c,(x[2]-c)*scl+c,(x[3]-c)*scl+c,col,alp); + idraw->drawTriangle((x[2]-c)*scl+c,(x[0]-c)*scl+c,(x[3]-c)*scl+c,col,alp); + } + } + } + /* Anchors */ + if(0!=(drawflags&fDrawFlags::Anchors)) + { + for(i=0;i<psb->m_anchors.size();++i) + { + const btSoftBody::Anchor& a=psb->m_anchors[i]; + const btVector3 q=a.m_body->getWorldTransform()*a.m_local; + drawVertex(idraw,a.m_node->m_x,0.25,btVector3(1,0,0)); + drawVertex(idraw,q,0.25,btVector3(0,1,0)); + idraw->drawLine(a.m_node->m_x,q,btVector3(1,1,1)); + } + for(i=0;i<psb->m_nodes.size();++i) + { + const btSoftBody::Node& n=psb->m_nodes[i]; + if(0==(n.m_material->m_flags&btSoftBody::fMaterial::DebugDraw)) continue; + if(n.m_im<=0) + { + drawVertex(idraw,n.m_x,0.25,btVector3(1,0,0)); + } + } + } + + + /* Notes */ + if(0!=(drawflags&fDrawFlags::Notes)) + { + for(i=0;i<psb->m_notes.size();++i) + { + const btSoftBody::Note& n=psb->m_notes[i]; + btVector3 p=n.m_offset; + for(int j=0;j<n.m_rank;++j) + { + p+=n.m_nodes[j]->m_x*n.m_coords[j]; + } + idraw->draw3dText(p,n.m_text); + } + } + /* Node tree */ + if(0!=(drawflags&fDrawFlags::NodeTree)) DrawNodeTree(psb,idraw); + /* Face tree */ + if(0!=(drawflags&fDrawFlags::FaceTree)) DrawFaceTree(psb,idraw); + /* Cluster tree */ + if(0!=(drawflags&fDrawFlags::ClusterTree)) DrawClusterTree(psb,idraw); + /* Joints */ + if(0!=(drawflags&fDrawFlags::Joints)) + { + for(i=0;i<psb->m_joints.size();++i) + { + const btSoftBody::Joint* pj=psb->m_joints[i]; + switch(pj->Type()) + { + case btSoftBody::Joint::eType::Linear: + { + const btSoftBody::LJoint* pjl=(const btSoftBody::LJoint*)pj; + const btVector3 a0=pj->m_bodies[0].xform()*pjl->m_refs[0]; + const btVector3 a1=pj->m_bodies[1].xform()*pjl->m_refs[1]; + idraw->drawLine(pj->m_bodies[0].xform().getOrigin(),a0,btVector3(1,1,0)); + idraw->drawLine(pj->m_bodies[1].xform().getOrigin(),a1,btVector3(0,1,1)); + drawVertex(idraw,a0,0.25,btVector3(1,1,0)); + drawVertex(idraw,a1,0.25,btVector3(0,1,1)); + } + break; + case btSoftBody::Joint::eType::Angular: + { + //const btSoftBody::AJoint* pja=(const btSoftBody::AJoint*)pj; + const btVector3 o0=pj->m_bodies[0].xform().getOrigin(); + const btVector3 o1=pj->m_bodies[1].xform().getOrigin(); + const btVector3 a0=pj->m_bodies[0].xform().getBasis()*pj->m_refs[0]; + const btVector3 a1=pj->m_bodies[1].xform().getBasis()*pj->m_refs[1]; + idraw->drawLine(o0,o0+a0*10,btVector3(1,1,0)); + idraw->drawLine(o0,o0+a1*10,btVector3(1,1,0)); + idraw->drawLine(o1,o1+a0*10,btVector3(0,1,1)); + idraw->drawLine(o1,o1+a1*10,btVector3(0,1,1)); + break; + } + default: + { + } + + } + } + } +} + +// +void btSoftBodyHelpers::DrawInfos( btSoftBody* psb, + btIDebugDraw* idraw, + bool masses, + bool areas, + bool /*stress*/) +{ + for(int i=0;i<psb->m_nodes.size();++i) + { + const btSoftBody::Node& n=psb->m_nodes[i]; + char text[2048]={0}; + char buff[1024]; + if(masses) + { + sprintf(buff," M(%.2f)",1/n.m_im); + strcat(text,buff); + } + if(areas) + { + sprintf(buff," A(%.2f)",n.m_area); + strcat(text,buff); + } + if(text[0]) idraw->draw3dText(n.m_x,text); + } +} + +// +void btSoftBodyHelpers::DrawNodeTree( btSoftBody* psb, + btIDebugDraw* idraw, + int mindepth, + int maxdepth) +{ + drawTree(idraw,psb->m_ndbvt.m_root,0,btVector3(1,0,1),btVector3(1,1,1),mindepth,maxdepth); +} + +// +void btSoftBodyHelpers::DrawFaceTree( btSoftBody* psb, + btIDebugDraw* idraw, + int mindepth, + int maxdepth) +{ + drawTree(idraw,psb->m_fdbvt.m_root,0,btVector3(0,1,0),btVector3(1,0,0),mindepth,maxdepth); +} + +// +void btSoftBodyHelpers::DrawClusterTree( btSoftBody* psb, + btIDebugDraw* idraw, + int mindepth, + int maxdepth) +{ + drawTree(idraw,psb->m_cdbvt.m_root,0,btVector3(0,1,1),btVector3(1,0,0),mindepth,maxdepth); +} + + +//The btSoftBody object from the BulletSDK includes an array of Nodes and Links. These links appear +// to be first set up to connect a node to between 5 and 6 of its neighbors [480 links], +//and then to the rest of the nodes after the execution of the Floyd-Warshall graph algorithm +//[another 930 links]. +//The way the links are stored by default, we have a number of cases where adjacent links share a node in common +// - this leads to the creation of a data dependency through memory. +//The PSolve_Links() function reads and writes nodes as it iterates over each link. +//So, we now have the possibility of a data dependency between iteration X +//that processes link L with iteration X+1 that processes link L+1 +//because L and L+1 have one node in common, and iteration X updates the positions of that node, +//and iteration X+1 reads in the position of that shared node. +// +//Such a memory dependency limits the ability of a modern CPU to speculate beyond +//a certain point because it has to respect a possible dependency +//- this prevents the CPU from making full use of its out-of-order resources. +//If we re-order the links such that we minimize the cases where a link L and L+1 share a common node, +//we create a temporal gap between when the node position is written, +//and when it is subsequently read. This in turn allows the CPU to continue execution without +//risking a dependency violation. Such a reordering would result in significant speedups on +//modern CPUs with lots of execution resources. +//In our testing, we see it have a tremendous impact not only on the A7, +//but also on all x86 cores that ship with modern Macs. +//The attached source file includes a single function (ReoptimizeLinkOrder) which can be called on a +//btSoftBody object in the solveConstraints() function before the actual solver is invoked, +//or right after generateBendingConstraints() once we have all 1410 links. + + +//=================================================================== +// +// +// This function takes in a list of interdependent Links and tries +// to maximize the distance between calculation +// of dependent links. This increases the amount of parallelism that can +// be exploited by out-of-order instruction processors with large but +// (inevitably) finite instruction windows. +// +//=================================================================== + +// A small structure to track lists of dependent link calculations +class LinkDeps_t { + public: + int value; // A link calculation that is dependent on this one + // Positive values = "input A" while negative values = "input B" + LinkDeps_t *next; // Next dependence in the list +}; +typedef LinkDeps_t *LinkDepsPtr_t; + +// Dependency list constants +#define REOP_NOT_DEPENDENT -1 +#define REOP_NODE_COMPLETE -2 // Must be less than REOP_NOT_DEPENDENT + + +void btSoftBodyHelpers::ReoptimizeLinkOrder(btSoftBody *psb /* This can be replaced by a btSoftBody pointer */) +{ + int i, nLinks=psb->m_links.size(), nNodes=psb->m_nodes.size(); + btSoftBody::Link *lr; + int ar, br; + btSoftBody::Node *node0 = &(psb->m_nodes[0]); + btSoftBody::Node *node1 = &(psb->m_nodes[1]); + LinkDepsPtr_t linkDep; + int readyListHead, readyListTail, linkNum, linkDepFrees, depLink; + + // Allocate temporary buffers + int *nodeWrittenAt = new int[nNodes+1]; // What link calculation produced this node's current values? + int *linkDepA = new int[nLinks]; // Link calculation input is dependent upon prior calculation #N + int *linkDepB = new int[nLinks]; + int *readyList = new int[nLinks]; // List of ready-to-process link calculations (# of links, maximum) + LinkDeps_t *linkDepFreeList = new LinkDeps_t[2*nLinks]; // Dependent-on-me list elements (2x# of links, maximum) + LinkDepsPtr_t *linkDepListStarts = new LinkDepsPtr_t[nLinks]; // Start nodes of dependent-on-me lists, one for each link + + // Copy the original, unsorted links to a side buffer + btSoftBody::Link *linkBuffer = new btSoftBody::Link[nLinks]; + memcpy(linkBuffer, &(psb->m_links[0]), sizeof(btSoftBody::Link)*nLinks); + + // Clear out the node setup and ready list + for (i=0; i < nNodes+1; i++) { + nodeWrittenAt[i] = REOP_NOT_DEPENDENT; + } + for (i=0; i < nLinks; i++) { + linkDepListStarts[i] = NULL; + } + readyListHead = readyListTail = linkDepFrees = 0; + + // Initial link analysis to set up data structures + for (i=0; i < nLinks; i++) { + + // Note which prior link calculations we are dependent upon & build up dependence lists + lr = &(psb->m_links[i]); + ar = (lr->m_n[0] - node0)/(node1 - node0); + br = (lr->m_n[1] - node0)/(node1 - node0); + if (nodeWrittenAt[ar] > REOP_NOT_DEPENDENT) { + linkDepA[i] = nodeWrittenAt[ar]; + linkDep = &linkDepFreeList[linkDepFrees++]; + linkDep->value = i; + linkDep->next = linkDepListStarts[nodeWrittenAt[ar]]; + linkDepListStarts[nodeWrittenAt[ar]] = linkDep; + } else { + linkDepA[i] = REOP_NOT_DEPENDENT; + } + if (nodeWrittenAt[br] > REOP_NOT_DEPENDENT) { + linkDepB[i] = nodeWrittenAt[br]; + linkDep = &linkDepFreeList[linkDepFrees++]; + linkDep->value = -(i+1); + linkDep->next = linkDepListStarts[nodeWrittenAt[br]]; + linkDepListStarts[nodeWrittenAt[br]] = linkDep; + } else { + linkDepB[i] = REOP_NOT_DEPENDENT; + } + + // Add this link to the initial ready list, if it is not dependent on any other links + if ((linkDepA[i] == REOP_NOT_DEPENDENT) && (linkDepB[i] == REOP_NOT_DEPENDENT)) { + readyList[readyListTail++] = i; + linkDepA[i] = linkDepB[i] = REOP_NODE_COMPLETE; // Probably not needed now + } + + // Update the nodes to mark which ones are calculated by this link + nodeWrittenAt[ar] = nodeWrittenAt[br] = i; + } + + // Process the ready list and create the sorted list of links + // -- By treating the ready list as a queue, we maximize the distance between any + // inter-dependent node calculations + // -- All other (non-related) nodes in the ready list will automatically be inserted + // in between each set of inter-dependent link calculations by this loop + i = 0; + while (readyListHead != readyListTail) { + // Use ready list to select the next link to process + linkNum = readyList[readyListHead++]; + // Copy the next-to-calculate link back into the original link array + psb->m_links[i++] = linkBuffer[linkNum]; + + // Free up any link inputs that are dependent on this one + linkDep = linkDepListStarts[linkNum]; + while (linkDep) { + depLink = linkDep->value; + if (depLink >= 0) { + linkDepA[depLink] = REOP_NOT_DEPENDENT; + } else { + depLink = -depLink - 1; + linkDepB[depLink] = REOP_NOT_DEPENDENT; + } + // Add this dependent link calculation to the ready list if *both* inputs are clear + if ((linkDepA[depLink] == REOP_NOT_DEPENDENT) && (linkDepB[depLink] == REOP_NOT_DEPENDENT)) { + readyList[readyListTail++] = depLink; + linkDepA[depLink] = linkDepB[depLink] = REOP_NODE_COMPLETE; // Probably not needed now + } + linkDep = linkDep->next; + } + } + + // Delete the temporary buffers + delete [] nodeWrittenAt; + delete [] linkDepA; + delete [] linkDepB; + delete [] readyList; + delete [] linkDepFreeList; + delete [] linkDepListStarts; + delete [] linkBuffer; +} + + +// +void btSoftBodyHelpers::DrawFrame( btSoftBody* psb, + btIDebugDraw* idraw) +{ + if(psb->m_pose.m_bframe) + { + static const btScalar ascl=10; + static const btScalar nscl=(btScalar)0.1; + const btVector3 com=psb->m_pose.m_com; + const btMatrix3x3 trs=psb->m_pose.m_rot*psb->m_pose.m_scl; + const btVector3 Xaxis=(trs*btVector3(1,0,0)).normalized(); + const btVector3 Yaxis=(trs*btVector3(0,1,0)).normalized(); + const btVector3 Zaxis=(trs*btVector3(0,0,1)).normalized(); + idraw->drawLine(com,com+Xaxis*ascl,btVector3(1,0,0)); + idraw->drawLine(com,com+Yaxis*ascl,btVector3(0,1,0)); + idraw->drawLine(com,com+Zaxis*ascl,btVector3(0,0,1)); + for(int i=0;i<psb->m_pose.m_pos.size();++i) + { + const btVector3 x=com+trs*psb->m_pose.m_pos[i]; + drawVertex(idraw,x,nscl,btVector3(1,0,1)); + } + } +} + +// +btSoftBody* btSoftBodyHelpers::CreateRope( btSoftBodyWorldInfo& worldInfo, const btVector3& from, + const btVector3& to, + int res, + int fixeds) +{ + /* Create nodes */ + const int r=res+2; + btVector3* x=new btVector3[r]; + btScalar* m=new btScalar[r]; + int i; + + for(i=0;i<r;++i) + { + const btScalar t=i/(btScalar)(r-1); + x[i]=lerp(from,to,t); + m[i]=1; + } + btSoftBody* psb= new btSoftBody(&worldInfo,r,x,m); + if(fixeds&1) psb->setMass(0,0); + if(fixeds&2) psb->setMass(r-1,0); + delete[] x; + delete[] m; + /* Create links */ + for(i=1;i<r;++i) + { + psb->appendLink(i-1,i); + } + /* Finished */ + return(psb); +} + +// +btSoftBody* btSoftBodyHelpers::CreatePatch(btSoftBodyWorldInfo& worldInfo,const btVector3& corner00, + const btVector3& corner10, + const btVector3& corner01, + const btVector3& corner11, + int resx, + int resy, + int fixeds, + bool gendiags) +{ +#define IDX(_x_,_y_) ((_y_)*rx+(_x_)) + /* Create nodes */ + if((resx<2)||(resy<2)) return(0); + const int rx=resx; + const int ry=resy; + const int tot=rx*ry; + btVector3* x=new btVector3[tot]; + btScalar* m=new btScalar[tot]; + int iy; + + for(iy=0;iy<ry;++iy) + { + const btScalar ty=iy/(btScalar)(ry-1); + const btVector3 py0=lerp(corner00,corner01,ty); + const btVector3 py1=lerp(corner10,corner11,ty); + for(int ix=0;ix<rx;++ix) + { + const btScalar tx=ix/(btScalar)(rx-1); + x[IDX(ix,iy)]=lerp(py0,py1,tx); + m[IDX(ix,iy)]=1; + } + } + btSoftBody* psb=new btSoftBody(&worldInfo,tot,x,m); + if(fixeds&1) psb->setMass(IDX(0,0),0); + if(fixeds&2) psb->setMass(IDX(rx-1,0),0); + if(fixeds&4) psb->setMass(IDX(0,ry-1),0); + if(fixeds&8) psb->setMass(IDX(rx-1,ry-1),0); + delete[] x; + delete[] m; + /* Create links and faces */ + for(iy=0;iy<ry;++iy) + { + for(int ix=0;ix<rx;++ix) + { + const int idx=IDX(ix,iy); + const bool mdx=(ix+1)<rx; + const bool mdy=(iy+1)<ry; + if(mdx) psb->appendLink(idx,IDX(ix+1,iy)); + if(mdy) psb->appendLink(idx,IDX(ix,iy+1)); + if(mdx&&mdy) + { + if((ix+iy)&1) + { + psb->appendFace(IDX(ix,iy),IDX(ix+1,iy),IDX(ix+1,iy+1)); + psb->appendFace(IDX(ix,iy),IDX(ix+1,iy+1),IDX(ix,iy+1)); + if(gendiags) + { + psb->appendLink(IDX(ix,iy),IDX(ix+1,iy+1)); + } + } + else + { + psb->appendFace(IDX(ix,iy+1),IDX(ix,iy),IDX(ix+1,iy)); + psb->appendFace(IDX(ix,iy+1),IDX(ix+1,iy),IDX(ix+1,iy+1)); + if(gendiags) + { + psb->appendLink(IDX(ix+1,iy),IDX(ix,iy+1)); + } + } + } + } + } + /* Finished */ +#undef IDX + return(psb); +} + +// +btSoftBody* btSoftBodyHelpers::CreatePatchUV(btSoftBodyWorldInfo& worldInfo, + const btVector3& corner00, + const btVector3& corner10, + const btVector3& corner01, + const btVector3& corner11, + int resx, + int resy, + int fixeds, + bool gendiags, + float* tex_coords) +{ + + /* + * + * corners: + * + * [0][0] corner00 ------- corner01 [resx][0] + * | | + * | | + * [0][resy] corner10 -------- corner11 [resx][resy] + * + * + * + * + * + * + * "fixedgs" map: + * + * corner00 --> +1 + * corner01 --> +2 + * corner10 --> +4 + * corner11 --> +8 + * upper middle --> +16 + * left middle --> +32 + * right middle --> +64 + * lower middle --> +128 + * center --> +256 + * + * + * tex_coords size (resx-1)*(resy-1)*12 + * + * + * + * SINGLE QUAD INTERNALS + * + * 1) btSoftBody's nodes and links, + * diagonal link is optional ("gendiags") + * + * + * node00 ------ node01 + * | . + * | . + * | . + * | . + * | . + * node10 node11 + * + * + * + * 2) Faces: + * two triangles, + * UV Coordinates (hier example for single quad) + * + * (0,1) (0,1) (1,1) + * 1 |\ 3 \-----| 2 + * | \ \ | + * | \ \ | + * | \ \ | + * | \ \ | + * 2 |-----\ 3 \| 1 + * (0,0) (1,0) (1,0) + * + * + * + * + * + * + */ + +#define IDX(_x_,_y_) ((_y_)*rx+(_x_)) + /* Create nodes */ + if((resx<2)||(resy<2)) return(0); + const int rx=resx; + const int ry=resy; + const int tot=rx*ry; + btVector3* x=new btVector3[tot]; + btScalar* m=new btScalar[tot]; + + int iy; + + for(iy=0;iy<ry;++iy) + { + const btScalar ty=iy/(btScalar)(ry-1); + const btVector3 py0=lerp(corner00,corner01,ty); + const btVector3 py1=lerp(corner10,corner11,ty); + for(int ix=0;ix<rx;++ix) + { + const btScalar tx=ix/(btScalar)(rx-1); + x[IDX(ix,iy)]=lerp(py0,py1,tx); + m[IDX(ix,iy)]=1; + } + } + btSoftBody* psb=new btSoftBody(&worldInfo,tot,x,m); + if(fixeds&1) psb->setMass(IDX(0,0),0); + if(fixeds&2) psb->setMass(IDX(rx-1,0),0); + if(fixeds&4) psb->setMass(IDX(0,ry-1),0); + if(fixeds&8) psb->setMass(IDX(rx-1,ry-1),0); + if(fixeds&16) psb->setMass(IDX((rx-1)/2,0),0); + if(fixeds&32) psb->setMass(IDX(0,(ry-1)/2),0); + if(fixeds&64) psb->setMass(IDX(rx-1,(ry-1)/2),0); + if(fixeds&128) psb->setMass(IDX((rx-1)/2,ry-1),0); + if(fixeds&256) psb->setMass(IDX((rx-1)/2,(ry-1)/2),0); + delete[] x; + delete[] m; + + + int z = 0; + /* Create links and faces */ + for(iy=0;iy<ry;++iy) + { + for(int ix=0;ix<rx;++ix) + { + const bool mdx=(ix+1)<rx; + const bool mdy=(iy+1)<ry; + + int node00=IDX(ix,iy); + int node01=IDX(ix+1,iy); + int node10=IDX(ix,iy+1); + int node11=IDX(ix+1,iy+1); + + if(mdx) psb->appendLink(node00,node01); + if(mdy) psb->appendLink(node00,node10); + if(mdx&&mdy) + { + psb->appendFace(node00,node10,node11); + if (tex_coords) { + tex_coords[z+0]=CalculateUV(resx,resy,ix,iy,0); + tex_coords[z+1]=CalculateUV(resx,resy,ix,iy,1); + tex_coords[z+2]=CalculateUV(resx,resy,ix,iy,0); + tex_coords[z+3]=CalculateUV(resx,resy,ix,iy,2); + tex_coords[z+4]=CalculateUV(resx,resy,ix,iy,3); + tex_coords[z+5]=CalculateUV(resx,resy,ix,iy,2); + } + psb->appendFace(node11,node01,node00); + if (tex_coords) { + tex_coords[z+6 ]=CalculateUV(resx,resy,ix,iy,3); + tex_coords[z+7 ]=CalculateUV(resx,resy,ix,iy,2); + tex_coords[z+8 ]=CalculateUV(resx,resy,ix,iy,3); + tex_coords[z+9 ]=CalculateUV(resx,resy,ix,iy,1); + tex_coords[z+10]=CalculateUV(resx,resy,ix,iy,0); + tex_coords[z+11]=CalculateUV(resx,resy,ix,iy,1); + } + if (gendiags) psb->appendLink(node00,node11); + z += 12; + } + } + } + /* Finished */ +#undef IDX + return(psb); +} + +float btSoftBodyHelpers::CalculateUV(int resx,int resy,int ix,int iy,int id) +{ + + /* + * + * + * node00 --- node01 + * | | + * node10 --- node11 + * + * + * ID map: + * + * node00 s --> 0 + * node00 t --> 1 + * + * node01 s --> 3 + * node01 t --> 1 + * + * node10 s --> 0 + * node10 t --> 2 + * + * node11 s --> 3 + * node11 t --> 2 + * + * + */ + + float tc=0.0f; + if (id == 0) { + tc = (1.0f/((resx-1))*ix); + } + else if (id==1) { + tc = (1.0f/((resy-1))*(resy-1-iy)); + } + else if (id==2) { + tc = (1.0f/((resy-1))*(resy-1-iy-1)); + } + else if (id==3) { + tc = (1.0f/((resx-1))*(ix+1)); + } + return tc; +} +// +btSoftBody* btSoftBodyHelpers::CreateEllipsoid(btSoftBodyWorldInfo& worldInfo,const btVector3& center, + const btVector3& radius, + int res) +{ + struct Hammersley + { + static void Generate(btVector3* x,int n) + { + for(int i=0;i<n;i++) + { + btScalar p=0.5,t=0; + for(int j=i;j;p*=0.5,j>>=1) if(j&1) t+=p; + btScalar w=2*t-1; + btScalar a=(SIMD_PI+2*i*SIMD_PI)/n; + btScalar s=btSqrt(1-w*w); + *x++=btVector3(s*btCos(a),s*btSin(a),w); + } + } + }; + btAlignedObjectArray<btVector3> vtx; + vtx.resize(3+res); + Hammersley::Generate(&vtx[0],vtx.size()); + for(int i=0;i<vtx.size();++i) + { + vtx[i]=vtx[i]*radius+center; + } + return(CreateFromConvexHull(worldInfo,&vtx[0],vtx.size())); +} + + + +// +btSoftBody* btSoftBodyHelpers::CreateFromTriMesh(btSoftBodyWorldInfo& worldInfo,const btScalar* vertices, + const int* triangles, + int ntriangles, bool randomizeConstraints) +{ + int maxidx=0; + int i,j,ni; + + for(i=0,ni=ntriangles*3;i<ni;++i) + { + maxidx=btMax(triangles[i],maxidx); + } + ++maxidx; + btAlignedObjectArray<bool> chks; + btAlignedObjectArray<btVector3> vtx; + chks.resize(maxidx*maxidx,false); + vtx.resize(maxidx); + for(i=0,j=0,ni=maxidx*3;i<ni;++j,i+=3) + { + vtx[j]=btVector3(vertices[i],vertices[i+1],vertices[i+2]); + } + btSoftBody* psb=new btSoftBody(&worldInfo,vtx.size(),&vtx[0],0); + for( i=0,ni=ntriangles*3;i<ni;i+=3) + { + const int idx[]={triangles[i],triangles[i+1],triangles[i+2]}; +#define IDX(_x_,_y_) ((_y_)*maxidx+(_x_)) + for(int j=2,k=0;k<3;j=k++) + { + if(!chks[IDX(idx[j],idx[k])]) + { + chks[IDX(idx[j],idx[k])]=true; + chks[IDX(idx[k],idx[j])]=true; + psb->appendLink(idx[j],idx[k]); + } + } +#undef IDX + psb->appendFace(idx[0],idx[1],idx[2]); + } + + if (randomizeConstraints) + { + psb->randomizeConstraints(); + } + + return(psb); +} + +// +btSoftBody* btSoftBodyHelpers::CreateFromConvexHull(btSoftBodyWorldInfo& worldInfo, const btVector3* vertices, + int nvertices, bool randomizeConstraints) +{ + HullDesc hdsc(QF_TRIANGLES,nvertices,vertices); + HullResult hres; + HullLibrary hlib;/*??*/ + hdsc.mMaxVertices=nvertices; + hlib.CreateConvexHull(hdsc,hres); + btSoftBody* psb=new btSoftBody(&worldInfo,(int)hres.mNumOutputVertices, + &hres.m_OutputVertices[0],0); + for(int i=0;i<(int)hres.mNumFaces;++i) + { + const int idx[]={ static_cast<int>(hres.m_Indices[i*3+0]), + static_cast<int>(hres.m_Indices[i*3+1]), + static_cast<int>(hres.m_Indices[i*3+2])}; + if(idx[0]<idx[1]) psb->appendLink( idx[0],idx[1]); + if(idx[1]<idx[2]) psb->appendLink( idx[1],idx[2]); + if(idx[2]<idx[0]) psb->appendLink( idx[2],idx[0]); + psb->appendFace(idx[0],idx[1],idx[2]); + } + hlib.ReleaseResult(hres); + if (randomizeConstraints) + { + psb->randomizeConstraints(); + } + return(psb); +} + + + + +static int nextLine(const char* buffer) +{ + int numBytesRead=0; + + while (*buffer != '\n') + { + buffer++; + numBytesRead++; + } + + + if (buffer[0]==0x0a) + { + buffer++; + numBytesRead++; + } + return numBytesRead; +} + +/* Create from TetGen .ele, .face, .node data */ +btSoftBody* btSoftBodyHelpers::CreateFromTetGenData(btSoftBodyWorldInfo& worldInfo, + const char* ele, + const char* face, + const char* node, + bool bfacelinks, + bool btetralinks, + bool bfacesfromtetras) +{ +btAlignedObjectArray<btVector3> pos; +int nnode=0; +int ndims=0; +int nattrb=0; +int hasbounds=0; +int result = sscanf(node,"%d %d %d %d",&nnode,&ndims,&nattrb,&hasbounds); +result = sscanf(node,"%d %d %d %d",&nnode,&ndims,&nattrb,&hasbounds); +node += nextLine(node); + +pos.resize(nnode); +for(int i=0;i<pos.size();++i) + { + int index=0; + //int bound=0; + float x,y,z; + sscanf(node,"%d %f %f %f",&index,&x,&y,&z); + +// sn>>index; +// sn>>x;sn>>y;sn>>z; + node += nextLine(node); + + //for(int j=0;j<nattrb;++j) + // sn>>a; + + //if(hasbounds) + // sn>>bound; + + pos[index].setX(btScalar(x)); + pos[index].setY(btScalar(y)); + pos[index].setZ(btScalar(z)); + } +btSoftBody* psb=new btSoftBody(&worldInfo,nnode,&pos[0],0); +#if 0 +if(face&&face[0]) + { + int nface=0; + sf>>nface;sf>>hasbounds; + for(int i=0;i<nface;++i) + { + int index=0; + int bound=0; + int ni[3]; + sf>>index; + sf>>ni[0];sf>>ni[1];sf>>ni[2]; + sf>>bound; + psb->appendFace(ni[0],ni[1],ni[2]); + if(btetralinks) + { + psb->appendLink(ni[0],ni[1],0,true); + psb->appendLink(ni[1],ni[2],0,true); + psb->appendLink(ni[2],ni[0],0,true); + } + } + } +#endif + +if(ele&&ele[0]) + { + int ntetra=0; + int ncorner=0; + int neattrb=0; + sscanf(ele,"%d %d %d",&ntetra,&ncorner,&neattrb); + ele += nextLine(ele); + + //se>>ntetra;se>>ncorner;se>>neattrb; + for(int i=0;i<ntetra;++i) + { + int index=0; + int ni[4]; + + //se>>index; + //se>>ni[0];se>>ni[1];se>>ni[2];se>>ni[3]; + sscanf(ele,"%d %d %d %d %d",&index,&ni[0],&ni[1],&ni[2],&ni[3]); + ele+=nextLine(ele); + //for(int j=0;j<neattrb;++j) + // se>>a; + psb->appendTetra(ni[0],ni[1],ni[2],ni[3]); + if(btetralinks) + { + 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); + } + } + } +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()); +return(psb); +} + diff --git a/thirdparty/bullet/src/BulletSoftBody/btSoftBodyHelpers.h b/thirdparty/bullet/src/BulletSoftBody/btSoftBodyHelpers.h new file mode 100644 index 0000000000..7271530109 --- /dev/null +++ b/thirdparty/bullet/src/BulletSoftBody/btSoftBodyHelpers.h @@ -0,0 +1,148 @@ +/* +Bullet Continuous Collision Detection and Physics Library +Copyright (c) 2003-2008 Erwin Coumans http://continuousphysics.com/Bullet/ + +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_SOFT_BODY_HELPERS_H +#define BT_SOFT_BODY_HELPERS_H + +#include "btSoftBody.h" + +// +// Helpers +// + +/* fDrawFlags */ +struct fDrawFlags { enum _ { + Nodes = 0x0001, + Links = 0x0002, + Faces = 0x0004, + Tetras = 0x0008, + Normals = 0x0010, + Contacts = 0x0020, + Anchors = 0x0040, + Notes = 0x0080, + Clusters = 0x0100, + NodeTree = 0x0200, + FaceTree = 0x0400, + ClusterTree = 0x0800, + Joints = 0x1000, + /* presets */ + Std = Links+Faces+Tetras+Anchors+Notes+Joints, + StdTetra = Std-Faces+Tetras +};}; + +struct btSoftBodyHelpers +{ + /* Draw body */ + static void Draw( btSoftBody* psb, + btIDebugDraw* idraw, + int drawflags=fDrawFlags::Std); + /* Draw body infos */ + static void DrawInfos( btSoftBody* psb, + btIDebugDraw* idraw, + bool masses, + bool areas, + bool stress); + /* Draw node tree */ + static void DrawNodeTree( btSoftBody* psb, + btIDebugDraw* idraw, + int mindepth=0, + int maxdepth=-1); + /* Draw face tree */ + static void DrawFaceTree( btSoftBody* psb, + btIDebugDraw* idraw, + int mindepth=0, + int maxdepth=-1); + /* Draw cluster tree */ + static void DrawClusterTree(btSoftBody* psb, + btIDebugDraw* idraw, + int mindepth=0, + int maxdepth=-1); + /* Draw rigid frame */ + static void DrawFrame( btSoftBody* psb, + btIDebugDraw* idraw); + /* Create a rope */ + static btSoftBody* CreateRope( btSoftBodyWorldInfo& worldInfo, + const btVector3& from, + const btVector3& to, + int res, + int fixeds); + /* Create a patch */ + static btSoftBody* CreatePatch(btSoftBodyWorldInfo& worldInfo, + const btVector3& corner00, + const btVector3& corner10, + const btVector3& corner01, + const btVector3& corner11, + int resx, + int resy, + int fixeds, + bool gendiags); + /* Create a patch with UV Texture Coordinates */ + static btSoftBody* CreatePatchUV(btSoftBodyWorldInfo& worldInfo, + const btVector3& corner00, + const btVector3& corner10, + const btVector3& corner01, + const btVector3& corner11, + int resx, + int resy, + int fixeds, + bool gendiags, + float* tex_coords=0); + static float CalculateUV(int resx,int resy,int ix,int iy,int id); + /* Create an ellipsoid */ + static btSoftBody* CreateEllipsoid(btSoftBodyWorldInfo& worldInfo, + const btVector3& center, + const btVector3& radius, + int res); + /* Create from trimesh */ + static btSoftBody* CreateFromTriMesh( btSoftBodyWorldInfo& worldInfo, + const btScalar* vertices, + const int* triangles, + int ntriangles, + bool randomizeConstraints = true); + /* Create from convex-hull */ + static btSoftBody* CreateFromConvexHull( btSoftBodyWorldInfo& worldInfo, + const btVector3* vertices, + int nvertices, + bool randomizeConstraints = true); + + + /* Export TetGen compatible .smesh file */ +// static void ExportAsSMeshFile( btSoftBody* psb, +// const char* filename); + /* Create from TetGen .ele, .face, .node files */ +// static btSoftBody* CreateFromTetGenFile( btSoftBodyWorldInfo& worldInfo, +// const char* ele, +// const char* face, +// const char* node, +// bool bfacelinks, +// bool btetralinks, +// bool bfacesfromtetras); + /* Create from TetGen .ele, .face, .node data */ + static btSoftBody* CreateFromTetGenData( btSoftBodyWorldInfo& worldInfo, + const char* ele, + const char* face, + const char* node, + bool bfacelinks, + bool btetralinks, + bool bfacesfromtetras); + + /// 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, + /// so out-of-order processors can execute instructions from multiple iterations at once + static void ReoptimizeLinkOrder(btSoftBody *psb ); +}; + +#endif //BT_SOFT_BODY_HELPERS_H diff --git a/thirdparty/bullet/src/BulletSoftBody/btSoftBodyInternals.h b/thirdparty/bullet/src/BulletSoftBody/btSoftBodyInternals.h new file mode 100644 index 0000000000..1ad82616ea --- /dev/null +++ b/thirdparty/bullet/src/BulletSoftBody/btSoftBodyInternals.h @@ -0,0 +1,911 @@ +/* +Bullet Continuous Collision Detection and Physics Library +Copyright (c) 2003-2006 Erwin Coumans http://continuousphysics.com/Bullet/ + +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. +*/ +///btSoftBody implementation by Nathanael Presson + +#ifndef _BT_SOFT_BODY_INTERNALS_H +#define _BT_SOFT_BODY_INTERNALS_H + +#include "btSoftBody.h" + + +#include "LinearMath/btQuickprof.h" +#include "LinearMath/btPolarDecomposition.h" +#include "BulletCollision/BroadphaseCollision/btBroadphaseInterface.h" +#include "BulletCollision/CollisionDispatch/btCollisionDispatcher.h" +#include "BulletCollision/CollisionShapes/btConvexInternalShape.h" +#include "BulletCollision/NarrowPhaseCollision/btGjkEpa2.h" +#include <string.h> //for memset +// +// btSymMatrix +// +template <typename T> +struct btSymMatrix +{ + btSymMatrix() : dim(0) {} + btSymMatrix(int n,const T& init=T()) { resize(n,init); } + void resize(int n,const T& init=T()) { dim=n;store.resize((n*(n+1))/2,init); } + int index(int c,int r) const { if(c>r) btSwap(c,r);btAssert(r<dim);return((r*(r+1))/2+c); } + T& operator()(int c,int r) { return(store[index(c,r)]); } + const T& operator()(int c,int r) const { return(store[index(c,r)]); } + btAlignedObjectArray<T> store; + int dim; +}; + +// +// btSoftBodyCollisionShape +// +class btSoftBodyCollisionShape : public btConcaveShape +{ +public: + btSoftBody* m_body; + + btSoftBodyCollisionShape(btSoftBody* backptr) + { + m_shapeType = SOFTBODY_SHAPE_PROXYTYPE; + m_body=backptr; + } + + virtual ~btSoftBodyCollisionShape() + { + + } + + void processAllTriangles(btTriangleCallback* /*callback*/,const btVector3& /*aabbMin*/,const btVector3& /*aabbMax*/) const + { + //not yet + btAssert(0); + } + + ///getAabb returns the axis aligned bounding box in the coordinate frame of the given transform t. + virtual void getAabb(const btTransform& t,btVector3& aabbMin,btVector3& aabbMax) const + { + /* t is usually identity, except when colliding against btCompoundShape. See Issue 512 */ + const btVector3 mins=m_body->m_bounds[0]; + const btVector3 maxs=m_body->m_bounds[1]; + const btVector3 crns[]={t*btVector3(mins.x(),mins.y(),mins.z()), + t*btVector3(maxs.x(),mins.y(),mins.z()), + t*btVector3(maxs.x(),maxs.y(),mins.z()), + t*btVector3(mins.x(),maxs.y(),mins.z()), + t*btVector3(mins.x(),mins.y(),maxs.z()), + t*btVector3(maxs.x(),mins.y(),maxs.z()), + t*btVector3(maxs.x(),maxs.y(),maxs.z()), + t*btVector3(mins.x(),maxs.y(),maxs.z())}; + aabbMin=aabbMax=crns[0]; + for(int i=1;i<8;++i) + { + aabbMin.setMin(crns[i]); + aabbMax.setMax(crns[i]); + } + } + + + virtual void setLocalScaling(const btVector3& /*scaling*/) + { + ///na + } + virtual const btVector3& getLocalScaling() const + { + static const btVector3 dummy(1,1,1); + return dummy; + } + virtual void calculateLocalInertia(btScalar /*mass*/,btVector3& /*inertia*/) const + { + ///not yet + btAssert(0); + } + virtual const char* getName()const + { + return "SoftBody"; + } + +}; + +// +// btSoftClusterCollisionShape +// +class btSoftClusterCollisionShape : public btConvexInternalShape +{ +public: + const btSoftBody::Cluster* m_cluster; + + btSoftClusterCollisionShape (const btSoftBody::Cluster* cluster) : m_cluster(cluster) { setMargin(0); } + + + virtual btVector3 localGetSupportingVertex(const btVector3& vec) const + { + btSoftBody::Node* const * n=&m_cluster->m_nodes[0]; + btScalar d=btDot(vec,n[0]->m_x); + int j=0; + for(int i=1,ni=m_cluster->m_nodes.size();i<ni;++i) + { + const btScalar k=btDot(vec,n[i]->m_x); + if(k>d) { d=k;j=i; } + } + return(n[j]->m_x); + } + virtual btVector3 localGetSupportingVertexWithoutMargin(const btVector3& vec)const + { + return(localGetSupportingVertex(vec)); + } + //notice that the vectors should be unit length + virtual void batchedUnitVectorGetSupportingVertexWithoutMargin(const btVector3* vectors,btVector3* supportVerticesOut,int numVectors) const + {} + + + virtual void calculateLocalInertia(btScalar mass,btVector3& inertia) const + {} + + virtual void getAabb(const btTransform& t,btVector3& aabbMin,btVector3& aabbMax) const + {} + + virtual int getShapeType() const { return SOFTBODY_SHAPE_PROXYTYPE; } + + //debugging + virtual const char* getName()const {return "SOFTCLUSTER";} + + virtual void setMargin(btScalar margin) + { + btConvexInternalShape::setMargin(margin); + } + virtual btScalar getMargin() const + { + return btConvexInternalShape::getMargin(); + } +}; + +// +// Inline's +// + +// +template <typename T> +static inline void ZeroInitialize(T& value) +{ + memset(&value,0,sizeof(T)); +} +// +template <typename T> +static inline bool CompLess(const T& a,const T& b) +{ return(a<b); } +// +template <typename T> +static inline bool CompGreater(const T& a,const T& b) +{ return(a>b); } +// +template <typename T> +static inline T Lerp(const T& a,const T& b,btScalar t) +{ return(a+(b-a)*t); } +// +template <typename T> +static inline T InvLerp(const T& a,const T& b,btScalar t) +{ return((b+a*t-b*t)/(a*b)); } +// +static inline btMatrix3x3 Lerp( const btMatrix3x3& a, + const btMatrix3x3& b, + btScalar t) +{ + btMatrix3x3 r; + r[0]=Lerp(a[0],b[0],t); + r[1]=Lerp(a[1],b[1],t); + r[2]=Lerp(a[2],b[2],t); + return(r); +} +// +static inline btVector3 Clamp(const btVector3& v,btScalar maxlength) +{ + const btScalar sql=v.length2(); + if(sql>(maxlength*maxlength)) + return((v*maxlength)/btSqrt(sql)); + else + return(v); +} +// +template <typename T> +static inline T Clamp(const T& x,const T& l,const T& h) +{ return(x<l?l:x>h?h:x); } +// +template <typename T> +static inline T Sq(const T& x) +{ return(x*x); } +// +template <typename T> +static inline T Cube(const T& x) +{ return(x*x*x); } +// +template <typename T> +static inline T Sign(const T& x) +{ return((T)(x<0?-1:+1)); } +// +template <typename T> +static inline bool SameSign(const T& x,const T& y) +{ return((x*y)>0); } +// +static inline btScalar ClusterMetric(const btVector3& x,const btVector3& y) +{ + const btVector3 d=x-y; + return(btFabs(d[0])+btFabs(d[1])+btFabs(d[2])); +} +// +static inline btMatrix3x3 ScaleAlongAxis(const btVector3& a,btScalar s) +{ + const btScalar xx=a.x()*a.x(); + const btScalar yy=a.y()*a.y(); + const btScalar zz=a.z()*a.z(); + const btScalar xy=a.x()*a.y(); + const btScalar yz=a.y()*a.z(); + const btScalar zx=a.z()*a.x(); + btMatrix3x3 m; + m[0]=btVector3(1-xx+xx*s,xy*s-xy,zx*s-zx); + m[1]=btVector3(xy*s-xy,1-yy+yy*s,yz*s-yz); + m[2]=btVector3(zx*s-zx,yz*s-yz,1-zz+zz*s); + return(m); +} +// +static inline btMatrix3x3 Cross(const btVector3& v) +{ + btMatrix3x3 m; + m[0]=btVector3(0,-v.z(),+v.y()); + m[1]=btVector3(+v.z(),0,-v.x()); + m[2]=btVector3(-v.y(),+v.x(),0); + return(m); +} +// +static inline btMatrix3x3 Diagonal(btScalar x) +{ + btMatrix3x3 m; + m[0]=btVector3(x,0,0); + m[1]=btVector3(0,x,0); + m[2]=btVector3(0,0,x); + return(m); +} +// +static inline btMatrix3x3 Add(const btMatrix3x3& a, + const btMatrix3x3& b) +{ + btMatrix3x3 r; + for(int i=0;i<3;++i) r[i]=a[i]+b[i]; + return(r); +} +// +static inline btMatrix3x3 Sub(const btMatrix3x3& a, + const btMatrix3x3& b) +{ + btMatrix3x3 r; + for(int i=0;i<3;++i) r[i]=a[i]-b[i]; + return(r); +} +// +static inline btMatrix3x3 Mul(const btMatrix3x3& a, + btScalar b) +{ + btMatrix3x3 r; + for(int i=0;i<3;++i) r[i]=a[i]*b; + return(r); +} +// +static inline void Orthogonalize(btMatrix3x3& m) +{ + m[2]=btCross(m[0],m[1]).normalized(); + m[1]=btCross(m[2],m[0]).normalized(); + m[0]=btCross(m[1],m[2]).normalized(); +} +// +static inline btMatrix3x3 MassMatrix(btScalar im,const btMatrix3x3& iwi,const btVector3& r) +{ + const btMatrix3x3 cr=Cross(r); + return(Sub(Diagonal(im),cr*iwi*cr)); +} + +// +static inline btMatrix3x3 ImpulseMatrix( btScalar dt, + btScalar ima, + btScalar imb, + const btMatrix3x3& iwi, + const btVector3& r) +{ + return(Diagonal(1/dt)*Add(Diagonal(ima),MassMatrix(imb,iwi,r)).inverse()); +} + +// +static inline btMatrix3x3 ImpulseMatrix( btScalar ima,const btMatrix3x3& iia,const btVector3& ra, + btScalar imb,const btMatrix3x3& iib,const btVector3& rb) +{ + return(Add(MassMatrix(ima,iia,ra),MassMatrix(imb,iib,rb)).inverse()); +} + +// +static inline btMatrix3x3 AngularImpulseMatrix( const btMatrix3x3& iia, + const btMatrix3x3& iib) +{ + return(Add(iia,iib).inverse()); +} + +// +static inline btVector3 ProjectOnAxis( const btVector3& v, + const btVector3& a) +{ + return(a*btDot(v,a)); +} +// +static inline btVector3 ProjectOnPlane( const btVector3& v, + const btVector3& a) +{ + return(v-ProjectOnAxis(v,a)); +} + +// +static inline void ProjectOrigin( const btVector3& a, + const btVector3& b, + btVector3& prj, + btScalar& sqd) +{ + const btVector3 d=b-a; + const btScalar m2=d.length2(); + if(m2>SIMD_EPSILON) + { + const btScalar t=Clamp<btScalar>(-btDot(a,d)/m2,0,1); + const btVector3 p=a+d*t; + const btScalar l2=p.length2(); + if(l2<sqd) + { + prj=p; + sqd=l2; + } + } +} +// +static inline void ProjectOrigin( const btVector3& a, + const btVector3& b, + const btVector3& c, + btVector3& prj, + btScalar& sqd) +{ + const btVector3& q=btCross(b-a,c-a); + const btScalar m2=q.length2(); + if(m2>SIMD_EPSILON) + { + const btVector3 n=q/btSqrt(m2); + const btScalar k=btDot(a,n); + const btScalar k2=k*k; + if(k2<sqd) + { + const btVector3 p=n*k; + if( (btDot(btCross(a-p,b-p),q)>0)&& + (btDot(btCross(b-p,c-p),q)>0)&& + (btDot(btCross(c-p,a-p),q)>0)) + { + prj=p; + sqd=k2; + } + else + { + ProjectOrigin(a,b,prj,sqd); + ProjectOrigin(b,c,prj,sqd); + ProjectOrigin(c,a,prj,sqd); + } + } + } +} + +// +template <typename T> +static inline T BaryEval( const T& a, + const T& b, + const T& c, + const btVector3& coord) +{ + return(a*coord.x()+b*coord.y()+c*coord.z()); +} +// +static inline btVector3 BaryCoord( const btVector3& a, + const btVector3& b, + const btVector3& c, + const btVector3& p) +{ + const btScalar w[]={ btCross(a-p,b-p).length(), + btCross(b-p,c-p).length(), + btCross(c-p,a-p).length()}; + const btScalar isum=1/(w[0]+w[1]+w[2]); + return(btVector3(w[1]*isum,w[2]*isum,w[0]*isum)); +} + +// +inline static btScalar ImplicitSolve( btSoftBody::ImplicitFn* fn, + const btVector3& a, + const btVector3& b, + const btScalar accuracy, + const int maxiterations=256) +{ + btScalar span[2]={0,1}; + btScalar values[2]={fn->Eval(a),fn->Eval(b)}; + if(values[0]>values[1]) + { + btSwap(span[0],span[1]); + btSwap(values[0],values[1]); + } + if(values[0]>-accuracy) return(-1); + if(values[1]<+accuracy) return(-1); + for(int i=0;i<maxiterations;++i) + { + const btScalar t=Lerp(span[0],span[1],values[0]/(values[0]-values[1])); + const btScalar v=fn->Eval(Lerp(a,b,t)); + if((t<=0)||(t>=1)) break; + if(btFabs(v)<accuracy) return(t); + if(v<0) + { span[0]=t;values[0]=v; } + else + { span[1]=t;values[1]=v; } + } + return(-1); +} + +inline static void EvaluateMedium( const btSoftBodyWorldInfo* wfi, + const btVector3& x, + btSoftBody::sMedium& medium) +{ + medium.m_velocity = btVector3(0,0,0); + medium.m_pressure = 0; + medium.m_density = wfi->air_density; + if(wfi->water_density>0) + { + const btScalar depth=-(btDot(x,wfi->water_normal)+wfi->water_offset); + if(depth>0) + { + medium.m_density = wfi->water_density; + medium.m_pressure = depth*wfi->water_density*wfi->m_gravity.length(); + } + } +} + + +// +static inline btVector3 NormalizeAny(const btVector3& v) +{ + const btScalar l=v.length(); + if(l>SIMD_EPSILON) + return(v/l); + else + return(btVector3(0,0,0)); +} + +// +static inline btDbvtVolume VolumeOf( const btSoftBody::Face& f, + btScalar margin) +{ + const btVector3* pts[]={ &f.m_n[0]->m_x, + &f.m_n[1]->m_x, + &f.m_n[2]->m_x}; + btDbvtVolume vol=btDbvtVolume::FromPoints(pts,3); + vol.Expand(btVector3(margin,margin,margin)); + return(vol); +} + +// +static inline btVector3 CenterOf( const btSoftBody::Face& f) +{ + return((f.m_n[0]->m_x+f.m_n[1]->m_x+f.m_n[2]->m_x)/3); +} + +// +static inline btScalar AreaOf( const btVector3& x0, + const btVector3& x1, + const btVector3& x2) +{ + const btVector3 a=x1-x0; + const btVector3 b=x2-x0; + const btVector3 cr=btCross(a,b); + const btScalar area=cr.length(); + return(area); +} + +// +static inline btScalar VolumeOf( const btVector3& x0, + const btVector3& x1, + const btVector3& x2, + const btVector3& x3) +{ + const btVector3 a=x1-x0; + const btVector3 b=x2-x0; + const btVector3 c=x3-x0; + return(btDot(a,btCross(b,c))); +} + +// + + +// +static inline void ApplyClampedForce( btSoftBody::Node& n, + const btVector3& f, + btScalar dt) +{ + const btScalar dtim=dt*n.m_im; + if((f*dtim).length2()>n.m_v.length2()) + {/* Clamp */ + n.m_f-=ProjectOnAxis(n.m_v,f.normalized())/dtim; + } + else + {/* Apply */ + n.m_f+=f; + } +} + +// +static inline int MatchEdge( const btSoftBody::Node* a, + const btSoftBody::Node* b, + const btSoftBody::Node* ma, + const btSoftBody::Node* mb) +{ + if((a==ma)&&(b==mb)) return(0); + if((a==mb)&&(b==ma)) return(1); + return(-1); +} + +// +// btEigen : Extract eigen system, +// straitforward implementation of http://math.fullerton.edu/mathews/n2003/JacobiMethodMod.html +// outputs are NOT sorted. +// +struct btEigen +{ + static int system(btMatrix3x3& a,btMatrix3x3* vectors,btVector3* values=0) + { + static const int maxiterations=16; + static const btScalar accuracy=(btScalar)0.0001; + btMatrix3x3& v=*vectors; + int iterations=0; + vectors->setIdentity(); + do { + int p=0,q=1; + if(btFabs(a[p][q])<btFabs(a[0][2])) { p=0;q=2; } + if(btFabs(a[p][q])<btFabs(a[1][2])) { p=1;q=2; } + if(btFabs(a[p][q])>accuracy) + { + const btScalar w=(a[q][q]-a[p][p])/(2*a[p][q]); + const btScalar z=btFabs(w); + const btScalar t=w/(z*(btSqrt(1+w*w)+z)); + if(t==t)/* [WARNING] let hope that one does not get thrown aways by some compilers... */ + { + const btScalar c=1/btSqrt(t*t+1); + const btScalar s=c*t; + mulPQ(a,c,s,p,q); + mulTPQ(a,c,s,p,q); + mulPQ(v,c,s,p,q); + } else break; + } else break; + } while((++iterations)<maxiterations); + if(values) + { + *values=btVector3(a[0][0],a[1][1],a[2][2]); + } + return(iterations); + } +private: + static inline void mulTPQ(btMatrix3x3& a,btScalar c,btScalar s,int p,int q) + { + const btScalar m[2][3]={ {a[p][0],a[p][1],a[p][2]}, + {a[q][0],a[q][1],a[q][2]}}; + int i; + + for(i=0;i<3;++i) a[p][i]=c*m[0][i]-s*m[1][i]; + for(i=0;i<3;++i) a[q][i]=c*m[1][i]+s*m[0][i]; + } + static inline void mulPQ(btMatrix3x3& a,btScalar c,btScalar s,int p,int q) + { + const btScalar m[2][3]={ {a[0][p],a[1][p],a[2][p]}, + {a[0][q],a[1][q],a[2][q]}}; + int i; + + for(i=0;i<3;++i) a[i][p]=c*m[0][i]-s*m[1][i]; + for(i=0;i<3;++i) a[i][q]=c*m[1][i]+s*m[0][i]; + } +}; + +// +// Polar decomposition, +// "Computing the Polar Decomposition with Applications", Nicholas J. Higham, 1986. +// +static inline int PolarDecompose( const btMatrix3x3& m,btMatrix3x3& q,btMatrix3x3& s) +{ + static const btPolarDecomposition polar; + return polar.decompose(m, q, s); +} + +// +// btSoftColliders +// +struct btSoftColliders +{ + // + // ClusterBase + // + struct ClusterBase : btDbvt::ICollide + { + btScalar erp; + btScalar idt; + btScalar m_margin; + btScalar friction; + btScalar threshold; + ClusterBase() + { + erp =(btScalar)1; + idt =0; + m_margin =0; + friction =0; + threshold =(btScalar)0; + } + bool SolveContact( const btGjkEpaSolver2::sResults& res, + btSoftBody::Body ba,const btSoftBody::Body bb, + btSoftBody::CJoint& joint) + { + if(res.distance<m_margin) + { + btVector3 norm = res.normal; + norm.normalize();//is it necessary? + + const btVector3 ra=res.witnesses[0]-ba.xform().getOrigin(); + const btVector3 rb=res.witnesses[1]-bb.xform().getOrigin(); + const btVector3 va=ba.velocity(ra); + const btVector3 vb=bb.velocity(rb); + const btVector3 vrel=va-vb; + const btScalar rvac=btDot(vrel,norm); + btScalar depth=res.distance-m_margin; + +// printf("depth=%f\n",depth); + const btVector3 iv=norm*rvac; + const btVector3 fv=vrel-iv; + joint.m_bodies[0] = ba; + joint.m_bodies[1] = bb; + joint.m_refs[0] = ra*ba.xform().getBasis(); + joint.m_refs[1] = rb*bb.xform().getBasis(); + joint.m_rpos[0] = ra; + joint.m_rpos[1] = rb; + joint.m_cfm = 1; + joint.m_erp = 1; + joint.m_life = 0; + joint.m_maxlife = 0; + joint.m_split = 1; + + joint.m_drift = depth*norm; + + joint.m_normal = norm; +// printf("normal=%f,%f,%f\n",res.normal.getX(),res.normal.getY(),res.normal.getZ()); + joint.m_delete = false; + joint.m_friction = fv.length2()<(rvac*friction*rvac*friction)?1:friction; + joint.m_massmatrix = ImpulseMatrix( ba.invMass(),ba.invWorldInertia(),joint.m_rpos[0], + bb.invMass(),bb.invWorldInertia(),joint.m_rpos[1]); + + return(true); + } + return(false); + } + }; + // + // CollideCL_RS + // + struct CollideCL_RS : ClusterBase + { + btSoftBody* psb; + const btCollisionObjectWrapper* m_colObjWrap; + + void Process(const btDbvtNode* leaf) + { + btSoftBody::Cluster* cluster=(btSoftBody::Cluster*)leaf->data; + btSoftClusterCollisionShape cshape(cluster); + + const btConvexShape* rshape=(const btConvexShape*)m_colObjWrap->getCollisionShape(); + + ///don't collide an anchored cluster with a static/kinematic object + if(m_colObjWrap->getCollisionObject()->isStaticOrKinematicObject() && cluster->m_containsAnchor) + return; + + btGjkEpaSolver2::sResults res; + if(btGjkEpaSolver2::SignedDistance( &cshape,btTransform::getIdentity(), + rshape,m_colObjWrap->getWorldTransform(), + btVector3(1,0,0),res)) + { + btSoftBody::CJoint joint; + if(SolveContact(res,cluster,m_colObjWrap->getCollisionObject(),joint))//prb,joint)) + { + btSoftBody::CJoint* pj=new(btAlignedAlloc(sizeof(btSoftBody::CJoint),16)) btSoftBody::CJoint(); + *pj=joint;psb->m_joints.push_back(pj); + if(m_colObjWrap->getCollisionObject()->isStaticOrKinematicObject()) + { + pj->m_erp *= psb->m_cfg.kSKHR_CL; + pj->m_split *= psb->m_cfg.kSK_SPLT_CL; + } + else + { + pj->m_erp *= psb->m_cfg.kSRHR_CL; + pj->m_split *= psb->m_cfg.kSR_SPLT_CL; + } + } + } + } + void ProcessColObj(btSoftBody* ps,const btCollisionObjectWrapper* colObWrap) + { + psb = ps; + m_colObjWrap = colObWrap; + idt = ps->m_sst.isdt; + m_margin = m_colObjWrap->getCollisionShape()->getMargin()+psb->getCollisionShape()->getMargin(); + ///Bullet rigid body uses multiply instead of minimum to determine combined friction. Some customization would be useful. + friction = btMin(psb->m_cfg.kDF,m_colObjWrap->getCollisionObject()->getFriction()); + btVector3 mins; + btVector3 maxs; + + ATTRIBUTE_ALIGNED16(btDbvtVolume) volume; + colObWrap->getCollisionShape()->getAabb(colObWrap->getWorldTransform(),mins,maxs); + volume=btDbvtVolume::FromMM(mins,maxs); + volume.Expand(btVector3(1,1,1)*m_margin); + ps->m_cdbvt.collideTV(ps->m_cdbvt.m_root,volume,*this); + } + }; + // + // CollideCL_SS + // + struct CollideCL_SS : ClusterBase + { + btSoftBody* bodies[2]; + void Process(const btDbvtNode* la,const btDbvtNode* lb) + { + btSoftBody::Cluster* cla=(btSoftBody::Cluster*)la->data; + btSoftBody::Cluster* clb=(btSoftBody::Cluster*)lb->data; + + + bool connected=false; + if ((bodies[0]==bodies[1])&&(bodies[0]->m_clusterConnectivity.size())) + { + connected = bodies[0]->m_clusterConnectivity[cla->m_clusterIndex+bodies[0]->m_clusters.size()*clb->m_clusterIndex]; + } + + if (!connected) + { + btSoftClusterCollisionShape csa(cla); + btSoftClusterCollisionShape csb(clb); + btGjkEpaSolver2::sResults res; + if(btGjkEpaSolver2::SignedDistance( &csa,btTransform::getIdentity(), + &csb,btTransform::getIdentity(), + cla->m_com-clb->m_com,res)) + { + btSoftBody::CJoint joint; + if(SolveContact(res,cla,clb,joint)) + { + btSoftBody::CJoint* pj=new(btAlignedAlloc(sizeof(btSoftBody::CJoint),16)) btSoftBody::CJoint(); + *pj=joint;bodies[0]->m_joints.push_back(pj); + pj->m_erp *= btMax(bodies[0]->m_cfg.kSSHR_CL,bodies[1]->m_cfg.kSSHR_CL); + pj->m_split *= (bodies[0]->m_cfg.kSS_SPLT_CL+bodies[1]->m_cfg.kSS_SPLT_CL)/2; + } + } + } else + { + static int count=0; + count++; + //printf("count=%d\n",count); + + } + } + void ProcessSoftSoft(btSoftBody* psa,btSoftBody* psb) + { + idt = psa->m_sst.isdt; + //m_margin = (psa->getCollisionShape()->getMargin()+psb->getCollisionShape()->getMargin())/2; + m_margin = (psa->getCollisionShape()->getMargin()+psb->getCollisionShape()->getMargin()); + friction = btMin(psa->m_cfg.kDF,psb->m_cfg.kDF); + bodies[0] = psa; + bodies[1] = psb; + 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; + }; + // + // CollideVF_SS + // + struct CollideVF_SS : 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 o=node->m_x; + btVector3 p; + btScalar d=SIMD_INFINITY; + ProjectOrigin( face->m_n[0]->m_x-o, + face->m_n[1]->m_x-o, + face->m_n[2]->m_x-o, + p,d); + const btScalar m=mrg+(o-node->m_q).length()*2; + if(d<(m*m)) + { + const btSoftBody::Node* n[]={face->m_n[0],face->m_n[1],face->m_n[2]}; + const btVector3 w=BaryCoord(n[0]->m_x,n[1]->m_x,n[2]->m_x,p+o); + 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::SContact c; + c.m_normal = p/-btSqrt(d); + c.m_margin = m; + 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_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); + } + } + } + btSoftBody* psb[2]; + btScalar mrg; + }; +}; + +#endif //_BT_SOFT_BODY_INTERNALS_H diff --git a/thirdparty/bullet/src/BulletSoftBody/btSoftBodyRigidBodyCollisionConfiguration.cpp b/thirdparty/bullet/src/BulletSoftBody/btSoftBodyRigidBodyCollisionConfiguration.cpp new file mode 100644 index 0000000000..f5a67f6d89 --- /dev/null +++ b/thirdparty/bullet/src/BulletSoftBody/btSoftBodyRigidBodyCollisionConfiguration.cpp @@ -0,0 +1,134 @@ +/* +Bullet Continuous Collision Detection and Physics Library +Copyright (c) 2003-2006 Erwin Coumans http://continuousphysics.com/Bullet/ + +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. +*/ + +#include "btSoftBodyRigidBodyCollisionConfiguration.h" +#include "btSoftRigidCollisionAlgorithm.h" +#include "btSoftBodyConcaveCollisionAlgorithm.h" +#include "btSoftSoftCollisionAlgorithm.h" + +#include "LinearMath/btPoolAllocator.h" + +#define ENABLE_SOFTBODY_CONCAVE_COLLISIONS 1 + +btSoftBodyRigidBodyCollisionConfiguration::btSoftBodyRigidBodyCollisionConfiguration(const btDefaultCollisionConstructionInfo& constructionInfo) +:btDefaultCollisionConfiguration(constructionInfo) +{ + void* mem; + + mem = btAlignedAlloc(sizeof(btSoftSoftCollisionAlgorithm::CreateFunc),16); + m_softSoftCreateFunc = new(mem) btSoftSoftCollisionAlgorithm::CreateFunc; + + mem = btAlignedAlloc(sizeof(btSoftRigidCollisionAlgorithm::CreateFunc),16); + m_softRigidConvexCreateFunc = new(mem) btSoftRigidCollisionAlgorithm::CreateFunc; + + mem = btAlignedAlloc(sizeof(btSoftRigidCollisionAlgorithm::CreateFunc),16); + m_swappedSoftRigidConvexCreateFunc = new(mem) btSoftRigidCollisionAlgorithm::CreateFunc; + m_swappedSoftRigidConvexCreateFunc->m_swapped=true; + +#ifdef ENABLE_SOFTBODY_CONCAVE_COLLISIONS + mem = btAlignedAlloc(sizeof(btSoftBodyConcaveCollisionAlgorithm::CreateFunc),16); + m_softRigidConcaveCreateFunc = new(mem) btSoftBodyConcaveCollisionAlgorithm::CreateFunc; + + mem = btAlignedAlloc(sizeof(btSoftBodyConcaveCollisionAlgorithm::CreateFunc),16); + m_swappedSoftRigidConcaveCreateFunc = new(mem) btSoftBodyConcaveCollisionAlgorithm::SwappedCreateFunc; + m_swappedSoftRigidConcaveCreateFunc->m_swapped=true; +#endif + + //replace pool by a new one, with potential larger size + + if (m_ownsCollisionAlgorithmPool && m_collisionAlgorithmPool) + { + int curElemSize = m_collisionAlgorithmPool->getElementSize(); + ///calculate maximum element size, big enough to fit any collision algorithm in the memory pool + + + int maxSize0 = sizeof(btSoftSoftCollisionAlgorithm); + int maxSize1 = sizeof(btSoftRigidCollisionAlgorithm); + int maxSize2 = sizeof(btSoftBodyConcaveCollisionAlgorithm); + + int collisionAlgorithmMaxElementSize = btMax(maxSize0,maxSize1); + collisionAlgorithmMaxElementSize = btMax(collisionAlgorithmMaxElementSize,maxSize2); + + if (collisionAlgorithmMaxElementSize > curElemSize) + { + m_collisionAlgorithmPool->~btPoolAllocator(); + btAlignedFree(m_collisionAlgorithmPool); + void* mem = btAlignedAlloc(sizeof(btPoolAllocator),16); + m_collisionAlgorithmPool = new(mem) btPoolAllocator(collisionAlgorithmMaxElementSize,constructionInfo.m_defaultMaxCollisionAlgorithmPoolSize); + } + } + +} + +btSoftBodyRigidBodyCollisionConfiguration::~btSoftBodyRigidBodyCollisionConfiguration() +{ + m_softSoftCreateFunc->~btCollisionAlgorithmCreateFunc(); + btAlignedFree( m_softSoftCreateFunc); + + m_softRigidConvexCreateFunc->~btCollisionAlgorithmCreateFunc(); + btAlignedFree( m_softRigidConvexCreateFunc); + + m_swappedSoftRigidConvexCreateFunc->~btCollisionAlgorithmCreateFunc(); + btAlignedFree( m_swappedSoftRigidConvexCreateFunc); + +#ifdef ENABLE_SOFTBODY_CONCAVE_COLLISIONS + m_softRigidConcaveCreateFunc->~btCollisionAlgorithmCreateFunc(); + btAlignedFree( m_softRigidConcaveCreateFunc); + + m_swappedSoftRigidConcaveCreateFunc->~btCollisionAlgorithmCreateFunc(); + btAlignedFree( m_swappedSoftRigidConcaveCreateFunc); +#endif +} + +///creation of soft-soft and soft-rigid, and otherwise fallback to base class implementation +btCollisionAlgorithmCreateFunc* btSoftBodyRigidBodyCollisionConfiguration::getCollisionAlgorithmCreateFunc(int proxyType0,int proxyType1) +{ + + ///try to handle the softbody interactions first + + if ((proxyType0 == SOFTBODY_SHAPE_PROXYTYPE ) && (proxyType1==SOFTBODY_SHAPE_PROXYTYPE)) + { + return m_softSoftCreateFunc; + } + + ///softbody versus convex + if (proxyType0 == SOFTBODY_SHAPE_PROXYTYPE && btBroadphaseProxy::isConvex(proxyType1)) + { + return m_softRigidConvexCreateFunc; + } + + ///convex versus soft body + if (btBroadphaseProxy::isConvex(proxyType0) && proxyType1 == SOFTBODY_SHAPE_PROXYTYPE ) + { + return m_swappedSoftRigidConvexCreateFunc; + } + +#ifdef ENABLE_SOFTBODY_CONCAVE_COLLISIONS + ///softbody versus convex + if (proxyType0 == SOFTBODY_SHAPE_PROXYTYPE && btBroadphaseProxy::isConcave(proxyType1)) + { + return m_softRigidConcaveCreateFunc; + } + + ///convex versus soft body + if (btBroadphaseProxy::isConcave(proxyType0) && proxyType1 == SOFTBODY_SHAPE_PROXYTYPE ) + { + return m_swappedSoftRigidConcaveCreateFunc; + } +#endif + + ///fallback to the regular rigid collision shape + return btDefaultCollisionConfiguration::getCollisionAlgorithmCreateFunc(proxyType0,proxyType1); +} diff --git a/thirdparty/bullet/src/BulletSoftBody/btSoftBodyRigidBodyCollisionConfiguration.h b/thirdparty/bullet/src/BulletSoftBody/btSoftBodyRigidBodyCollisionConfiguration.h new file mode 100644 index 0000000000..21addcfe2e --- /dev/null +++ b/thirdparty/bullet/src/BulletSoftBody/btSoftBodyRigidBodyCollisionConfiguration.h @@ -0,0 +1,48 @@ +/* +Bullet Continuous Collision Detection and Physics Library +Copyright (c) 2003-2006 Erwin Coumans http://continuousphysics.com/Bullet/ + +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_SOFTBODY_RIGIDBODY_COLLISION_CONFIGURATION +#define BT_SOFTBODY_RIGIDBODY_COLLISION_CONFIGURATION + +#include "BulletCollision/CollisionDispatch/btDefaultCollisionConfiguration.h" + +class btVoronoiSimplexSolver; +class btGjkEpaPenetrationDepthSolver; + + +///btSoftBodyRigidBodyCollisionConfiguration add softbody interaction on top of btDefaultCollisionConfiguration +class btSoftBodyRigidBodyCollisionConfiguration : public btDefaultCollisionConfiguration +{ + + //default CreationFunctions, filling the m_doubleDispatch table + btCollisionAlgorithmCreateFunc* m_softSoftCreateFunc; + btCollisionAlgorithmCreateFunc* m_softRigidConvexCreateFunc; + btCollisionAlgorithmCreateFunc* m_swappedSoftRigidConvexCreateFunc; + btCollisionAlgorithmCreateFunc* m_softRigidConcaveCreateFunc; + btCollisionAlgorithmCreateFunc* m_swappedSoftRigidConcaveCreateFunc; + +public: + + btSoftBodyRigidBodyCollisionConfiguration(const btDefaultCollisionConstructionInfo& constructionInfo = btDefaultCollisionConstructionInfo()); + + virtual ~btSoftBodyRigidBodyCollisionConfiguration(); + + ///creation of soft-soft and soft-rigid, and otherwise fallback to base class implementation + virtual btCollisionAlgorithmCreateFunc* getCollisionAlgorithmCreateFunc(int proxyType0,int proxyType1); + +}; + +#endif //BT_SOFTBODY_RIGIDBODY_COLLISION_CONFIGURATION + diff --git a/thirdparty/bullet/src/BulletSoftBody/btSoftBodySolverVertexBuffer.h b/thirdparty/bullet/src/BulletSoftBody/btSoftBodySolverVertexBuffer.h new file mode 100644 index 0000000000..c4733d6400 --- /dev/null +++ b/thirdparty/bullet/src/BulletSoftBody/btSoftBodySolverVertexBuffer.h @@ -0,0 +1,165 @@ +/* +Bullet Continuous Collision Detection and Physics Library +Copyright (c) 2003-2006 Erwin Coumans http://continuousphysics.com/Bullet/ + +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_SOFT_BODY_SOLVER_VERTEX_BUFFER_H +#define BT_SOFT_BODY_SOLVER_VERTEX_BUFFER_H + + +class btVertexBufferDescriptor +{ +public: + enum BufferTypes + { + CPU_BUFFER, + DX11_BUFFER, + OPENGL_BUFFER + }; + +protected: + + bool m_hasVertexPositions; + bool m_hasNormals; + + int m_vertexOffset; + int m_vertexStride; + + int m_normalOffset; + int m_normalStride; + +public: + btVertexBufferDescriptor() + { + m_hasVertexPositions = false; + m_hasNormals = false; + m_vertexOffset = 0; + m_vertexStride = 0; + m_normalOffset = 0; + m_normalStride = 0; + } + + virtual ~btVertexBufferDescriptor() + { + + } + + virtual bool hasVertexPositions() const + { + return m_hasVertexPositions; + } + + virtual bool hasNormals() const + { + return m_hasNormals; + } + + /** + * Return the type of the vertex buffer descriptor. + */ + virtual BufferTypes getBufferType() const = 0; + + /** + * Return the vertex offset in floats from the base pointer. + */ + virtual int getVertexOffset() const + { + return m_vertexOffset; + } + + /** + * Return the vertex stride in number of floats between vertices. + */ + virtual int getVertexStride() const + { + return m_vertexStride; + } + + /** + * Return the vertex offset in floats from the base pointer. + */ + virtual int getNormalOffset() const + { + return m_normalOffset; + } + + /** + * Return the vertex stride in number of floats between vertices. + */ + virtual int getNormalStride() const + { + return m_normalStride; + } +}; + + +class btCPUVertexBufferDescriptor : public btVertexBufferDescriptor +{ +protected: + float *m_basePointer; + +public: + /** + * vertexBasePointer is pointer to beginning of the buffer. + * vertexOffset is the offset in floats to the first vertex. + * vertexStride is the stride in floats between vertices. + */ + btCPUVertexBufferDescriptor( float *basePointer, int vertexOffset, int vertexStride ) + { + m_basePointer = basePointer; + m_vertexOffset = vertexOffset; + m_vertexStride = vertexStride; + m_hasVertexPositions = true; + } + + /** + * vertexBasePointer is pointer to beginning of the buffer. + * vertexOffset is the offset in floats to the first vertex. + * vertexStride is the stride in floats between vertices. + */ + btCPUVertexBufferDescriptor( float *basePointer, int vertexOffset, int vertexStride, int normalOffset, int normalStride ) + { + m_basePointer = basePointer; + + m_vertexOffset = vertexOffset; + m_vertexStride = vertexStride; + m_hasVertexPositions = true; + + m_normalOffset = normalOffset; + m_normalStride = normalStride; + m_hasNormals = true; + } + + virtual ~btCPUVertexBufferDescriptor() + { + + } + + /** + * Return the type of the vertex buffer descriptor. + */ + virtual BufferTypes getBufferType() const + { + return CPU_BUFFER; + } + + /** + * Return the base pointer in memory to the first vertex. + */ + virtual float *getBasePointer() const + { + return m_basePointer; + } +}; + +#endif // #ifndef BT_SOFT_BODY_SOLVER_VERTEX_BUFFER_H diff --git a/thirdparty/bullet/src/BulletSoftBody/btSoftBodySolvers.h b/thirdparty/bullet/src/BulletSoftBody/btSoftBodySolvers.h new file mode 100644 index 0000000000..6947bc27d2 --- /dev/null +++ b/thirdparty/bullet/src/BulletSoftBody/btSoftBodySolvers.h @@ -0,0 +1,154 @@ +/* +Bullet Continuous Collision Detection and Physics Library +Copyright (c) 2003-2006 Erwin Coumans http://continuousphysics.com/Bullet/ + +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_SOFT_BODY_SOLVERS_H +#define BT_SOFT_BODY_SOLVERS_H + +#include "BulletCollision/CollisionShapes/btTriangleIndexVertexArray.h" + + +class btSoftBodyTriangleData; +class btSoftBodyLinkData; +class btSoftBodyVertexData; +class btVertexBufferDescriptor; +class btCollisionObject; +class btSoftBody; + + +class btSoftBodySolver +{ +public: + enum SolverTypes + { + DEFAULT_SOLVER, + CPU_SOLVER, + CL_SOLVER, + CL_SIMD_SOLVER, + DX_SOLVER, + DX_SIMD_SOLVER + }; + + +protected: + int m_numberOfPositionIterations; + int m_numberOfVelocityIterations; + // Simulation timescale + float m_timeScale; + +public: + btSoftBodySolver() : + m_numberOfPositionIterations( 10 ), + m_timeScale( 1 ) + { + m_numberOfVelocityIterations = 0; + m_numberOfPositionIterations = 5; + } + + virtual ~btSoftBodySolver() + { + } + + /** + * Return the type of the solver. + */ + virtual SolverTypes getSolverType() const = 0; + + + /** Ensure that this solver is initialized. */ + virtual bool checkInitialized() = 0; + + /** Optimize soft bodies in this solver. */ + virtual void optimize( btAlignedObjectArray< btSoftBody * > &softBodies , bool forceUpdate=false) = 0; + + /** Copy necessary data back to the original soft body source objects. */ + virtual void copyBackToSoftBodies(bool bMove = true) = 0; + + /** Predict motion of soft bodies into next timestep */ + virtual void predictMotion( float solverdt ) = 0; + + /** Solve constraints for a set of soft bodies */ + virtual void solveConstraints( float solverdt ) = 0; + + /** Perform necessary per-step updates of soft bodies such as recomputing normals and bounding boxes */ + virtual void updateSoftBodies() = 0; + + /** Process a collision between one of the world's soft bodies and another collision object */ + virtual void processCollision( btSoftBody *, const struct btCollisionObjectWrapper* ) = 0; + + /** Process a collision between two soft bodies */ + virtual void processCollision( btSoftBody*, btSoftBody* ) = 0; + + /** Set the number of velocity constraint solver iterations this solver uses. */ + virtual void setNumberOfPositionIterations( int iterations ) + { + m_numberOfPositionIterations = iterations; + } + + /** Get the number of velocity constraint solver iterations this solver uses. */ + virtual int getNumberOfPositionIterations() + { + return m_numberOfPositionIterations; + } + + /** Set the number of velocity constraint solver iterations this solver uses. */ + virtual void setNumberOfVelocityIterations( int iterations ) + { + m_numberOfVelocityIterations = iterations; + } + + /** Get the number of velocity constraint solver iterations this solver uses. */ + virtual int getNumberOfVelocityIterations() + { + return m_numberOfVelocityIterations; + } + + /** Return the timescale that the simulation is using */ + float getTimeScale() + { + return m_timeScale; + } + +#if 0 + /** + * Add a collision object to be used by the indicated softbody. + */ + virtual void addCollisionObjectForSoftBody( int clothIdentifier, btCollisionObject *collisionObject ) = 0; +#endif +}; + +/** + * Class to manage movement of data from a solver to a given target. + * This version is abstract. Subclasses will have custom pairings for different combinations. + */ +class btSoftBodySolverOutput +{ +protected: + +public: + btSoftBodySolverOutput() + { + } + + virtual ~btSoftBodySolverOutput() + { + } + + + /** Output current computed vertex data to the vertex buffers for all cloths in the solver. */ + virtual void copySoftBodyToVertexBuffer( const btSoftBody * const softBody, btVertexBufferDescriptor *vertexBuffer ) = 0; +}; + + +#endif // #ifndef BT_SOFT_BODY_SOLVERS_H diff --git a/thirdparty/bullet/src/BulletSoftBody/btSoftMultiBodyDynamicsWorld.cpp b/thirdparty/bullet/src/BulletSoftBody/btSoftMultiBodyDynamicsWorld.cpp new file mode 100644 index 0000000000..4e76dca9db --- /dev/null +++ b/thirdparty/bullet/src/BulletSoftBody/btSoftMultiBodyDynamicsWorld.cpp @@ -0,0 +1,367 @@ +/* +Bullet Continuous Collision Detection and Physics Library +Copyright (c) 2003-2006 Erwin Coumans http://continuousphysics.com/Bullet/ + +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. +*/ + + +#include "btSoftMultiBodyDynamicsWorld.h" +#include "LinearMath/btQuickprof.h" + +//softbody & helpers +#include "BulletSoftBody/btSoftBody.h" +#include "BulletSoftBody/btSoftBodyHelpers.h" +#include "BulletSoftBody/btSoftBodySolvers.h" +#include "BulletSoftBody/btDefaultSoftBodySolver.h" +#include "LinearMath/btSerializer.h" + + +btSoftMultiBodyDynamicsWorld::btSoftMultiBodyDynamicsWorld( + btDispatcher* dispatcher, + btBroadphaseInterface* pairCache, + btMultiBodyConstraintSolver* constraintSolver, + btCollisionConfiguration* collisionConfiguration, + btSoftBodySolver *softBodySolver ) : + btMultiBodyDynamicsWorld(dispatcher,pairCache,constraintSolver,collisionConfiguration), + m_softBodySolver( softBodySolver ), + m_ownsSolver(false) +{ + if( !m_softBodySolver ) + { + void* ptr = btAlignedAlloc(sizeof(btDefaultSoftBodySolver),16); + m_softBodySolver = new(ptr) btDefaultSoftBodySolver(); + m_ownsSolver = true; + } + + m_drawFlags = fDrawFlags::Std; + m_drawNodeTree = true; + m_drawFaceTree = false; + m_drawClusterTree = false; + m_sbi.m_broadphase = pairCache; + m_sbi.m_dispatcher = dispatcher; + m_sbi.m_sparsesdf.Initialize(); + m_sbi.m_sparsesdf.Reset(); + + m_sbi.air_density = (btScalar)1.2; + m_sbi.water_density = 0; + m_sbi.water_offset = 0; + m_sbi.water_normal = btVector3(0,0,0); + m_sbi.m_gravity.setValue(0,-10,0); + + m_sbi.m_sparsesdf.Initialize(); + + +} + +btSoftMultiBodyDynamicsWorld::~btSoftMultiBodyDynamicsWorld() +{ + if (m_ownsSolver) + { + m_softBodySolver->~btSoftBodySolver(); + btAlignedFree(m_softBodySolver); + } +} + +void btSoftMultiBodyDynamicsWorld::predictUnconstraintMotion(btScalar timeStep) +{ + btDiscreteDynamicsWorld::predictUnconstraintMotion( timeStep ); + { + BT_PROFILE("predictUnconstraintMotionSoftBody"); + m_softBodySolver->predictMotion( float(timeStep) ); + } +} + +void btSoftMultiBodyDynamicsWorld::internalSingleStepSimulation( btScalar timeStep ) +{ + + // Let the solver grab the soft bodies and if necessary optimize for it + m_softBodySolver->optimize( getSoftBodyArray() ); + + if( !m_softBodySolver->checkInitialized() ) + { + btAssert( "Solver initialization failed\n" ); + } + + btDiscreteDynamicsWorld::internalSingleStepSimulation( timeStep ); + + ///solve soft bodies constraints + solveSoftBodiesConstraints( timeStep ); + + //self collisions + for ( int i=0;i<m_softBodies.size();i++) + { + btSoftBody* psb=(btSoftBody*)m_softBodies[i]; + psb->defaultCollisionHandler(psb); + } + + ///update soft bodies + m_softBodySolver->updateSoftBodies( ); + + // End solver-wise simulation step + // /////////////////////////////// + +} + +void btSoftMultiBodyDynamicsWorld::solveSoftBodiesConstraints( btScalar timeStep ) +{ + BT_PROFILE("solveSoftConstraints"); + + if(m_softBodies.size()) + { + btSoftBody::solveClusters(m_softBodies); + } + + // Solve constraints solver-wise + m_softBodySolver->solveConstraints( timeStep * m_softBodySolver->getTimeScale() ); + +} + +void btSoftMultiBodyDynamicsWorld::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_softBodySolver ); + + btCollisionWorld::addCollisionObject(body, + collisionFilterGroup, + collisionFilterMask); + +} + +void btSoftMultiBodyDynamicsWorld::removeSoftBody(btSoftBody* body) +{ + m_softBodies.remove(body); + + btCollisionWorld::removeCollisionObject(body); +} + +void btSoftMultiBodyDynamicsWorld::removeCollisionObject(btCollisionObject* collisionObject) +{ + btSoftBody* body = btSoftBody::upcast(collisionObject); + if (body) + removeSoftBody(body); + else + btDiscreteDynamicsWorld::removeCollisionObject(collisionObject); +} + +void btSoftMultiBodyDynamicsWorld::debugDrawWorld() +{ + btDiscreteDynamicsWorld::debugDrawWorld(); + + if (getDebugDrawer()) + { + int i; + for ( i=0;i<this->m_softBodies.size();i++) + { + btSoftBody* psb=(btSoftBody*)this->m_softBodies[i]; + if (getDebugDrawer() && (getDebugDrawer()->getDebugMode() & (btIDebugDraw::DBG_DrawWireframe))) + { + btSoftBodyHelpers::DrawFrame(psb,m_debugDrawer); + btSoftBodyHelpers::Draw(psb,m_debugDrawer,m_drawFlags); + } + + if (m_debugDrawer && (m_debugDrawer->getDebugMode() & btIDebugDraw::DBG_DrawAabb)) + { + if(m_drawNodeTree) btSoftBodyHelpers::DrawNodeTree(psb,m_debugDrawer); + if(m_drawFaceTree) btSoftBodyHelpers::DrawFaceTree(psb,m_debugDrawer); + if(m_drawClusterTree) btSoftBodyHelpers::DrawClusterTree(psb,m_debugDrawer); + } + } + } +} + + + + +struct btSoftSingleRayCallback : public btBroadphaseRayCallback +{ + btVector3 m_rayFromWorld; + btVector3 m_rayToWorld; + btTransform m_rayFromTrans; + btTransform m_rayToTrans; + btVector3 m_hitNormal; + + const btSoftMultiBodyDynamicsWorld* m_world; + btCollisionWorld::RayResultCallback& m_resultCallback; + + btSoftSingleRayCallback(const btVector3& rayFromWorld,const btVector3& rayToWorld,const btSoftMultiBodyDynamicsWorld* 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; + collisionObject->getCollisionShape()->getAabb(collisionObject->getWorldTransform(),collisionObjectAabbMin,collisionObjectAabbMax); +#else + //getBroadphase()->getAabb(collisionObject->getBroadphaseHandle(),collisionObjectAabbMin,collisionObjectAabbMax); + const btVector3& collisionObjectAabbMin = collisionObject->getBroadphaseHandle()->m_aabbMin; + 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 btSoftMultiBodyDynamicsWorld::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 + btSoftSingleRayCallback rayCB(rayFromWorld,rayToWorld,this,resultCallback); + +#ifndef USE_BRUTEFORCE_RAYBROADPHASE + m_broadphasePairCache->rayTest(rayFromWorld,rayToWorld,rayCB); +#else + for (int i=0;i<this->getNumCollisionObjects();i++) + { + rayCB.process(m_collisionObjects[i]->getBroadphaseHandle()); + } +#endif //USE_BRUTEFORCE_RAYBROADPHASE + +} + + +void btSoftMultiBodyDynamicsWorld::rayTestSingle(const btTransform& rayFromTrans,const btTransform& rayToTrans, + btCollisionObject* collisionObject, + const btCollisionShape* collisionShape, + const btTransform& colObjWorldTransform, + RayResultCallback& resultCallback) +{ + if (collisionShape->isSoftBody()) { + btSoftBody* softBody = btSoftBody::upcast(collisionObject); + if (softBody) { + btSoftBody::sRayCast softResult; + if (softBody->rayTest(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(); + + if (softResult.feature == btSoftBody::eFeature::Face) + { + 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 btSoftMultiBodyDynamicsWorld::serializeSoftBodies(btSerializer* serializer) +{ + int i; + //serialize all collision objects + for (i=0;i<m_collisionObjects.size();i++) + { + btCollisionObject* colObj = m_collisionObjects[i]; + if (colObj->getInternalType() & btCollisionObject::CO_SOFT_BODY) + { + int len = colObj->calculateSerializeBufferSize(); + btChunk* chunk = serializer->allocate(len,1); + const char* structType = colObj->serialize(chunk->m_oldPtr, serializer); + serializer->finalizeChunk(chunk,structType,BT_SOFTBODY_CODE,colObj); + } + } + +} + +void btSoftMultiBodyDynamicsWorld::serialize(btSerializer* serializer) +{ + + serializer->startSerialization(); + + serializeDynamicsWorldInfo( serializer); + + serializeSoftBodies(serializer); + + serializeRigidBodies(serializer); + + serializeCollisionObjects(serializer); + + serializer->finishSerialization(); +} + + diff --git a/thirdparty/bullet/src/BulletSoftBody/btSoftMultiBodyDynamicsWorld.h b/thirdparty/bullet/src/BulletSoftBody/btSoftMultiBodyDynamicsWorld.h new file mode 100644 index 0000000000..6d46a21db5 --- /dev/null +++ b/thirdparty/bullet/src/BulletSoftBody/btSoftMultiBodyDynamicsWorld.h @@ -0,0 +1,110 @@ +/* +Bullet Continuous Collision Detection and Physics Library +Copyright (c) 2003-2006 Erwin Coumans http://continuousphysics.com/Bullet/ + +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_SOFT_MULTIBODY_DYNAMICS_WORLD_H +#define BT_SOFT_MULTIBODY_DYNAMICS_WORLD_H + +#include "BulletDynamics/Dynamics/btDiscreteDynamicsWorld.h" +#include "BulletDynamics/Featherstone/btMultiBodyDynamicsWorld.h" +#include "BulletSoftBody/btSoftBody.h" + +#ifndef BT_SOFT_RIGID_DYNAMICS_WORLD_H +typedef btAlignedObjectArray<btSoftBody*> btSoftBodyArray; +#endif + +class btSoftBodySolver; + +class btSoftMultiBodyDynamicsWorld : public btMultiBodyDynamicsWorld +{ + + btSoftBodyArray m_softBodies; + int m_drawFlags; + bool m_drawNodeTree; + bool m_drawFaceTree; + bool m_drawClusterTree; + btSoftBodyWorldInfo m_sbi; + ///Solver classes that encapsulate multiple soft bodies for solving + btSoftBodySolver *m_softBodySolver; + bool m_ownsSolver; + +protected: + + virtual void predictUnconstraintMotion(btScalar timeStep); + + virtual void internalSingleStepSimulation( btScalar timeStep); + + void solveSoftBodiesConstraints( btScalar timeStep ); + + void serializeSoftBodies(btSerializer* serializer); + +public: + + btSoftMultiBodyDynamicsWorld(btDispatcher* dispatcher,btBroadphaseInterface* pairCache,btMultiBodyConstraintSolver* constraintSolver, btCollisionConfiguration* collisionConfiguration, btSoftBodySolver *softBodySolver = 0 ); + + virtual ~btSoftMultiBodyDynamicsWorld(); + + virtual void debugDrawWorld(); + + void addSoftBody(btSoftBody* body, int collisionFilterGroup=btBroadphaseProxy::DefaultFilter, int collisionFilterMask=btBroadphaseProxy::AllFilter); + + void removeSoftBody(btSoftBody* body); + + ///removeCollisionObject will first check if it is a rigid body, if so call removeRigidBody otherwise call btDiscreteDynamicsWorld::removeCollisionObject + virtual void removeCollisionObject(btCollisionObject* collisionObject); + + int getDrawFlags() const { return(m_drawFlags); } + void setDrawFlags(int f) { m_drawFlags=f; } + + btSoftBodyWorldInfo& getWorldInfo() + { + return m_sbi; + } + const btSoftBodyWorldInfo& getWorldInfo() const + { + return m_sbi; + } + + virtual btDynamicsWorldType getWorldType() const + { + return BT_SOFT_MULTIBODY_DYNAMICS_WORLD; + } + + btSoftBodyArray& getSoftBodyArray() + { + return m_softBodies; + } + + const btSoftBodyArray& getSoftBodyArray() const + { + return m_softBodies; + } + + + virtual void rayTest(const btVector3& rayFromWorld, const btVector3& rayToWorld, RayResultCallback& resultCallback) const; + + /// rayTestSingle performs a raycast call and calls the resultCallback. It is used internally by rayTest. + /// In a future implementation, we consider moving the ray test as a virtual method in btCollisionShape. + /// This allows more customization. + static void rayTestSingle(const btTransform& rayFromTrans,const btTransform& rayToTrans, + btCollisionObject* collisionObject, + const btCollisionShape* collisionShape, + const btTransform& colObjWorldTransform, + RayResultCallback& resultCallback); + + virtual void serialize(btSerializer* serializer); + +}; + +#endif //BT_SOFT_MULTIBODY_DYNAMICS_WORLD_H diff --git a/thirdparty/bullet/src/BulletSoftBody/btSoftRigidCollisionAlgorithm.cpp b/thirdparty/bullet/src/BulletSoftBody/btSoftRigidCollisionAlgorithm.cpp new file mode 100644 index 0000000000..01c148a2ca --- /dev/null +++ b/thirdparty/bullet/src/BulletSoftBody/btSoftRigidCollisionAlgorithm.cpp @@ -0,0 +1,86 @@ +/* +Bullet Continuous Collision Detection and Physics Library +Copyright (c) 2003-2006 Erwin Coumans http://continuousphysics.com/Bullet/ + +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. +*/ + +#include "btSoftRigidCollisionAlgorithm.h" +#include "BulletCollision/CollisionDispatch/btCollisionDispatcher.h" +#include "BulletCollision/CollisionShapes/btSphereShape.h" +#include "BulletCollision/CollisionShapes/btBoxShape.h" +#include "BulletCollision/CollisionDispatch/btCollisionObject.h" +#include "btSoftBody.h" +#include "BulletSoftBody/btSoftBodySolvers.h" +#include "BulletCollision/CollisionDispatch/btCollisionObjectWrapper.h" + +///TODO: include all the shapes that the softbody can collide with +///alternatively, implement special case collision algorithms (just like for rigid collision shapes) + +//#include <stdio.h> + +btSoftRigidCollisionAlgorithm::btSoftRigidCollisionAlgorithm(btPersistentManifold* /*mf*/,const btCollisionAlgorithmConstructionInfo& ci,const btCollisionObjectWrapper* ,const btCollisionObjectWrapper* , bool isSwapped) +: btCollisionAlgorithm(ci), +//m_ownManifold(false), +//m_manifoldPtr(mf), +m_isSwapped(isSwapped) +{ +} + + +btSoftRigidCollisionAlgorithm::~btSoftRigidCollisionAlgorithm() +{ + + //m_softBody->m_overlappingRigidBodies.remove(m_rigidCollisionObject); + + /*if (m_ownManifold) + { + if (m_manifoldPtr) + m_dispatcher->releaseManifold(m_manifoldPtr); + } + */ + +} + + +#include <stdio.h> + +void btSoftRigidCollisionAlgorithm::processCollision (const btCollisionObjectWrapper* body0Wrap,const btCollisionObjectWrapper* body1Wrap,const btDispatcherInfo& dispatchInfo,btManifoldResult* resultOut) +{ + (void)dispatchInfo; + (void)resultOut; + //printf("btSoftRigidCollisionAlgorithm\n"); +// const btCollisionObjectWrapper* softWrap = m_isSwapped?body1Wrap:body0Wrap; +// const btCollisionObjectWrapper* rigidWrap = m_isSwapped?body0Wrap:body1Wrap; + btSoftBody* softBody = m_isSwapped? (btSoftBody*)body1Wrap->getCollisionObject() : (btSoftBody*)body0Wrap->getCollisionObject(); + const btCollisionObjectWrapper* rigidCollisionObjectWrap = m_isSwapped? body0Wrap : body1Wrap; + + if (softBody->m_collisionDisabledObjects.findLinearSearch(rigidCollisionObjectWrap->getCollisionObject())==softBody->m_collisionDisabledObjects.size()) + { + softBody->getSoftBodySolver()->processCollision(softBody, rigidCollisionObjectWrap); + } + + +} + +btScalar btSoftRigidCollisionAlgorithm::calculateTimeOfImpact(btCollisionObject* col0,btCollisionObject* col1,const btDispatcherInfo& dispatchInfo,btManifoldResult* resultOut) +{ + (void)resultOut; + (void)dispatchInfo; + (void)col0; + (void)col1; + + //not yet + return btScalar(1.); +} + + + diff --git a/thirdparty/bullet/src/BulletSoftBody/btSoftRigidCollisionAlgorithm.h b/thirdparty/bullet/src/BulletSoftBody/btSoftRigidCollisionAlgorithm.h new file mode 100644 index 0000000000..93fcc6065b --- /dev/null +++ b/thirdparty/bullet/src/BulletSoftBody/btSoftRigidCollisionAlgorithm.h @@ -0,0 +1,75 @@ +/* +Bullet Continuous Collision Detection and Physics Library +Copyright (c) 2003-2006 Erwin Coumans http://continuousphysics.com/Bullet/ + +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_SOFT_RIGID_COLLISION_ALGORITHM_H +#define BT_SOFT_RIGID_COLLISION_ALGORITHM_H + +#include "BulletCollision/BroadphaseCollision/btCollisionAlgorithm.h" +#include "BulletCollision/BroadphaseCollision/btBroadphaseProxy.h" +#include "BulletCollision/CollisionDispatch/btCollisionCreateFunc.h" +class btPersistentManifold; +#include "BulletCollision/CollisionDispatch/btCollisionDispatcher.h" + +#include "LinearMath/btVector3.h" +class btSoftBody; + +/// btSoftRigidCollisionAlgorithm provides collision detection between btSoftBody and btRigidBody +class btSoftRigidCollisionAlgorithm : public btCollisionAlgorithm +{ + // bool m_ownManifold; + // btPersistentManifold* m_manifoldPtr; + + //btSoftBody* m_softBody; + //btCollisionObject* m_rigidCollisionObject; + + ///for rigid versus soft (instead of soft versus rigid), we use this swapped boolean + bool m_isSwapped; + +public: + + btSoftRigidCollisionAlgorithm(btPersistentManifold* mf,const btCollisionAlgorithmConstructionInfo& ci,const btCollisionObjectWrapper* col0,const btCollisionObjectWrapper* col1Wrap, bool isSwapped); + + virtual ~btSoftRigidCollisionAlgorithm(); + + virtual void processCollision (const btCollisionObjectWrapper* body0Wrap,const btCollisionObjectWrapper* body1Wrap,const btDispatcherInfo& dispatchInfo,btManifoldResult* resultOut); + + virtual btScalar calculateTimeOfImpact(btCollisionObject* body0,btCollisionObject* body1,const btDispatcherInfo& dispatchInfo,btManifoldResult* resultOut); + + virtual void getAllContactManifolds(btManifoldArray& manifoldArray) + { + //we don't add any manifolds + } + + + struct CreateFunc :public btCollisionAlgorithmCreateFunc + { + virtual btCollisionAlgorithm* CreateCollisionAlgorithm(btCollisionAlgorithmConstructionInfo& ci, const btCollisionObjectWrapper* body0Wrap,const btCollisionObjectWrapper* body1Wrap) + { + void* mem = ci.m_dispatcher1->allocateCollisionAlgorithm(sizeof(btSoftRigidCollisionAlgorithm)); + if (!m_swapped) + { + return new(mem) btSoftRigidCollisionAlgorithm(0,ci,body0Wrap,body1Wrap,false); + } else + { + return new(mem) btSoftRigidCollisionAlgorithm(0,ci,body0Wrap,body1Wrap,true); + } + } + }; + +}; + +#endif //BT_SOFT_RIGID_COLLISION_ALGORITHM_H + + diff --git a/thirdparty/bullet/src/BulletSoftBody/btSoftRigidDynamicsWorld.cpp b/thirdparty/bullet/src/BulletSoftBody/btSoftRigidDynamicsWorld.cpp new file mode 100644 index 0000000000..204b4f576d --- /dev/null +++ b/thirdparty/bullet/src/BulletSoftBody/btSoftRigidDynamicsWorld.cpp @@ -0,0 +1,367 @@ +/* +Bullet Continuous Collision Detection and Physics Library +Copyright (c) 2003-2006 Erwin Coumans http://continuousphysics.com/Bullet/ + +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. +*/ + + +#include "btSoftRigidDynamicsWorld.h" +#include "LinearMath/btQuickprof.h" + +//softbody & helpers +#include "btSoftBody.h" +#include "btSoftBodyHelpers.h" +#include "btSoftBodySolvers.h" +#include "btDefaultSoftBodySolver.h" +#include "LinearMath/btSerializer.h" + + +btSoftRigidDynamicsWorld::btSoftRigidDynamicsWorld( + btDispatcher* dispatcher, + btBroadphaseInterface* pairCache, + btConstraintSolver* constraintSolver, + btCollisionConfiguration* collisionConfiguration, + btSoftBodySolver *softBodySolver ) : + btDiscreteDynamicsWorld(dispatcher,pairCache,constraintSolver,collisionConfiguration), + m_softBodySolver( softBodySolver ), + m_ownsSolver(false) +{ + if( !m_softBodySolver ) + { + void* ptr = btAlignedAlloc(sizeof(btDefaultSoftBodySolver),16); + m_softBodySolver = new(ptr) btDefaultSoftBodySolver(); + m_ownsSolver = true; + } + + m_drawFlags = fDrawFlags::Std; + m_drawNodeTree = true; + m_drawFaceTree = false; + m_drawClusterTree = false; + m_sbi.m_broadphase = pairCache; + m_sbi.m_dispatcher = dispatcher; + m_sbi.m_sparsesdf.Initialize(); + m_sbi.m_sparsesdf.Reset(); + + m_sbi.air_density = (btScalar)1.2; + m_sbi.water_density = 0; + m_sbi.water_offset = 0; + m_sbi.water_normal = btVector3(0,0,0); + m_sbi.m_gravity.setValue(0,-10,0); + + m_sbi.m_sparsesdf.Initialize(); + + +} + +btSoftRigidDynamicsWorld::~btSoftRigidDynamicsWorld() +{ + if (m_ownsSolver) + { + m_softBodySolver->~btSoftBodySolver(); + btAlignedFree(m_softBodySolver); + } +} + +void btSoftRigidDynamicsWorld::predictUnconstraintMotion(btScalar timeStep) +{ + btDiscreteDynamicsWorld::predictUnconstraintMotion( timeStep ); + { + BT_PROFILE("predictUnconstraintMotionSoftBody"); + m_softBodySolver->predictMotion( float(timeStep) ); + } +} + +void btSoftRigidDynamicsWorld::internalSingleStepSimulation( btScalar timeStep ) +{ + + // Let the solver grab the soft bodies and if necessary optimize for it + m_softBodySolver->optimize( getSoftBodyArray() ); + + if( !m_softBodySolver->checkInitialized() ) + { + btAssert( "Solver initialization failed\n" ); + } + + btDiscreteDynamicsWorld::internalSingleStepSimulation( timeStep ); + + ///solve soft bodies constraints + solveSoftBodiesConstraints( timeStep ); + + //self collisions + for ( int i=0;i<m_softBodies.size();i++) + { + btSoftBody* psb=(btSoftBody*)m_softBodies[i]; + psb->defaultCollisionHandler(psb); + } + + ///update soft bodies + m_softBodySolver->updateSoftBodies( ); + + // End solver-wise simulation step + // /////////////////////////////// + +} + +void btSoftRigidDynamicsWorld::solveSoftBodiesConstraints( btScalar timeStep ) +{ + BT_PROFILE("solveSoftConstraints"); + + if(m_softBodies.size()) + { + btSoftBody::solveClusters(m_softBodies); + } + + // Solve constraints solver-wise + m_softBodySolver->solveConstraints( timeStep * m_softBodySolver->getTimeScale() ); + +} + +void btSoftRigidDynamicsWorld::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_softBodySolver ); + + btCollisionWorld::addCollisionObject(body, + collisionFilterGroup, + collisionFilterMask); + +} + +void btSoftRigidDynamicsWorld::removeSoftBody(btSoftBody* body) +{ + m_softBodies.remove(body); + + btCollisionWorld::removeCollisionObject(body); +} + +void btSoftRigidDynamicsWorld::removeCollisionObject(btCollisionObject* collisionObject) +{ + btSoftBody* body = btSoftBody::upcast(collisionObject); + if (body) + removeSoftBody(body); + else + btDiscreteDynamicsWorld::removeCollisionObject(collisionObject); +} + +void btSoftRigidDynamicsWorld::debugDrawWorld() +{ + btDiscreteDynamicsWorld::debugDrawWorld(); + + if (getDebugDrawer()) + { + int i; + for ( i=0;i<this->m_softBodies.size();i++) + { + btSoftBody* psb=(btSoftBody*)this->m_softBodies[i]; + if (getDebugDrawer() && (getDebugDrawer()->getDebugMode() & (btIDebugDraw::DBG_DrawWireframe))) + { + btSoftBodyHelpers::DrawFrame(psb,m_debugDrawer); + btSoftBodyHelpers::Draw(psb,m_debugDrawer,m_drawFlags); + } + + if (m_debugDrawer && (m_debugDrawer->getDebugMode() & btIDebugDraw::DBG_DrawAabb)) + { + if(m_drawNodeTree) btSoftBodyHelpers::DrawNodeTree(psb,m_debugDrawer); + if(m_drawFaceTree) btSoftBodyHelpers::DrawFaceTree(psb,m_debugDrawer); + if(m_drawClusterTree) btSoftBodyHelpers::DrawClusterTree(psb,m_debugDrawer); + } + } + } +} + + + + +struct btSoftSingleRayCallback : public btBroadphaseRayCallback +{ + btVector3 m_rayFromWorld; + btVector3 m_rayToWorld; + btTransform m_rayFromTrans; + btTransform m_rayToTrans; + btVector3 m_hitNormal; + + const btSoftRigidDynamicsWorld* m_world; + btCollisionWorld::RayResultCallback& m_resultCallback; + + btSoftSingleRayCallback(const btVector3& rayFromWorld,const btVector3& rayToWorld,const btSoftRigidDynamicsWorld* 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; + collisionObject->getCollisionShape()->getAabb(collisionObject->getWorldTransform(),collisionObjectAabbMin,collisionObjectAabbMax); +#else + //getBroadphase()->getAabb(collisionObject->getBroadphaseHandle(),collisionObjectAabbMin,collisionObjectAabbMax); + const btVector3& collisionObjectAabbMin = collisionObject->getBroadphaseHandle()->m_aabbMin; + 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 btSoftRigidDynamicsWorld::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 + btSoftSingleRayCallback rayCB(rayFromWorld,rayToWorld,this,resultCallback); + +#ifndef USE_BRUTEFORCE_RAYBROADPHASE + m_broadphasePairCache->rayTest(rayFromWorld,rayToWorld,rayCB); +#else + for (int i=0;i<this->getNumCollisionObjects();i++) + { + rayCB.process(m_collisionObjects[i]->getBroadphaseHandle()); + } +#endif //USE_BRUTEFORCE_RAYBROADPHASE + +} + + +void btSoftRigidDynamicsWorld::rayTestSingle(const btTransform& rayFromTrans,const btTransform& rayToTrans, + btCollisionObject* collisionObject, + const btCollisionShape* collisionShape, + const btTransform& colObjWorldTransform, + RayResultCallback& resultCallback) +{ + if (collisionShape->isSoftBody()) { + btSoftBody* softBody = btSoftBody::upcast(collisionObject); + if (softBody) { + btSoftBody::sRayCast softResult; + if (softBody->rayTest(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(); + + if (softResult.feature == btSoftBody::eFeature::Face) + { + 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 btSoftRigidDynamicsWorld::serializeSoftBodies(btSerializer* serializer) +{ + int i; + //serialize all collision objects + for (i=0;i<m_collisionObjects.size();i++) + { + btCollisionObject* colObj = m_collisionObjects[i]; + if (colObj->getInternalType() & btCollisionObject::CO_SOFT_BODY) + { + int len = colObj->calculateSerializeBufferSize(); + btChunk* chunk = serializer->allocate(len,1); + const char* structType = colObj->serialize(chunk->m_oldPtr, serializer); + serializer->finalizeChunk(chunk,structType,BT_SOFTBODY_CODE,colObj); + } + } + +} + +void btSoftRigidDynamicsWorld::serialize(btSerializer* serializer) +{ + + serializer->startSerialization(); + + serializeDynamicsWorldInfo( serializer); + + serializeSoftBodies(serializer); + + serializeRigidBodies(serializer); + + serializeCollisionObjects(serializer); + + serializer->finishSerialization(); +} + + diff --git a/thirdparty/bullet/src/BulletSoftBody/btSoftRigidDynamicsWorld.h b/thirdparty/bullet/src/BulletSoftBody/btSoftRigidDynamicsWorld.h new file mode 100644 index 0000000000..d921a6488d --- /dev/null +++ b/thirdparty/bullet/src/BulletSoftBody/btSoftRigidDynamicsWorld.h @@ -0,0 +1,107 @@ +/* +Bullet Continuous Collision Detection and Physics Library +Copyright (c) 2003-2006 Erwin Coumans http://continuousphysics.com/Bullet/ + +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_SOFT_RIGID_DYNAMICS_WORLD_H +#define BT_SOFT_RIGID_DYNAMICS_WORLD_H + +#include "BulletDynamics/Dynamics/btDiscreteDynamicsWorld.h" +#include "btSoftBody.h" + +typedef btAlignedObjectArray<btSoftBody*> btSoftBodyArray; + +class btSoftBodySolver; + +class btSoftRigidDynamicsWorld : public btDiscreteDynamicsWorld +{ + + btSoftBodyArray m_softBodies; + int m_drawFlags; + bool m_drawNodeTree; + bool m_drawFaceTree; + bool m_drawClusterTree; + btSoftBodyWorldInfo m_sbi; + ///Solver classes that encapsulate multiple soft bodies for solving + btSoftBodySolver *m_softBodySolver; + bool m_ownsSolver; + +protected: + + virtual void predictUnconstraintMotion(btScalar timeStep); + + virtual void internalSingleStepSimulation( btScalar timeStep); + + void solveSoftBodiesConstraints( btScalar timeStep ); + + void serializeSoftBodies(btSerializer* serializer); + +public: + + btSoftRigidDynamicsWorld(btDispatcher* dispatcher,btBroadphaseInterface* pairCache,btConstraintSolver* constraintSolver, btCollisionConfiguration* collisionConfiguration, btSoftBodySolver *softBodySolver = 0 ); + + virtual ~btSoftRigidDynamicsWorld(); + + virtual void debugDrawWorld(); + + void addSoftBody(btSoftBody* body, int collisionFilterGroup=btBroadphaseProxy::DefaultFilter, int collisionFilterMask=btBroadphaseProxy::AllFilter); + + void removeSoftBody(btSoftBody* body); + + ///removeCollisionObject will first check if it is a rigid body, if so call removeRigidBody otherwise call btDiscreteDynamicsWorld::removeCollisionObject + virtual void removeCollisionObject(btCollisionObject* collisionObject); + + int getDrawFlags() const { return(m_drawFlags); } + void setDrawFlags(int f) { m_drawFlags=f; } + + btSoftBodyWorldInfo& getWorldInfo() + { + return m_sbi; + } + const btSoftBodyWorldInfo& getWorldInfo() const + { + return m_sbi; + } + + virtual btDynamicsWorldType getWorldType() const + { + return BT_SOFT_RIGID_DYNAMICS_WORLD; + } + + btSoftBodyArray& getSoftBodyArray() + { + return m_softBodies; + } + + const btSoftBodyArray& getSoftBodyArray() const + { + return m_softBodies; + } + + + virtual void rayTest(const btVector3& rayFromWorld, const btVector3& rayToWorld, RayResultCallback& resultCallback) const; + + /// rayTestSingle performs a raycast call and calls the resultCallback. It is used internally by rayTest. + /// In a future implementation, we consider moving the ray test as a virtual method in btCollisionShape. + /// This allows more customization. + static void rayTestSingle(const btTransform& rayFromTrans,const btTransform& rayToTrans, + btCollisionObject* collisionObject, + const btCollisionShape* collisionShape, + const btTransform& colObjWorldTransform, + RayResultCallback& resultCallback); + + virtual void serialize(btSerializer* serializer); + +}; + +#endif //BT_SOFT_RIGID_DYNAMICS_WORLD_H diff --git a/thirdparty/bullet/src/BulletSoftBody/btSoftSoftCollisionAlgorithm.cpp b/thirdparty/bullet/src/BulletSoftBody/btSoftSoftCollisionAlgorithm.cpp new file mode 100644 index 0000000000..72043e69e2 --- /dev/null +++ b/thirdparty/bullet/src/BulletSoftBody/btSoftSoftCollisionAlgorithm.cpp @@ -0,0 +1,48 @@ +/* +Bullet Continuous Collision Detection and Physics Library +Copyright (c) 2003-2006 Erwin Coumans http://continuousphysics.com/Bullet/ + +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. +*/ + +#include "btSoftSoftCollisionAlgorithm.h" +#include "BulletCollision/CollisionDispatch/btCollisionDispatcher.h" +#include "BulletCollision/CollisionShapes/btBoxShape.h" +#include "BulletCollision/CollisionDispatch/btCollisionObject.h" +#include "BulletSoftBody/btSoftBodySolvers.h" +#include "btSoftBody.h" +#include "BulletCollision/CollisionDispatch/btCollisionObjectWrapper.h" + +#define USE_PERSISTENT_CONTACTS 1 + +btSoftSoftCollisionAlgorithm::btSoftSoftCollisionAlgorithm(btPersistentManifold* /*mf*/,const btCollisionAlgorithmConstructionInfo& ci,const btCollisionObjectWrapper* /*obj0*/,const btCollisionObjectWrapper* /*obj1*/) +: btCollisionAlgorithm(ci) +//m_ownManifold(false), +//m_manifoldPtr(mf) +{ +} + +btSoftSoftCollisionAlgorithm::~btSoftSoftCollisionAlgorithm() +{ +} + +void btSoftSoftCollisionAlgorithm::processCollision (const btCollisionObjectWrapper* body0Wrap,const btCollisionObjectWrapper* body1Wrap,const btDispatcherInfo& /*dispatchInfo*/,btManifoldResult* /*resultOut*/) +{ + btSoftBody* soft0 = (btSoftBody*)body0Wrap->getCollisionObject(); + btSoftBody* soft1 = (btSoftBody*)body1Wrap->getCollisionObject(); + soft0->getSoftBodySolver()->processCollision(soft0, soft1); +} + +btScalar btSoftSoftCollisionAlgorithm::calculateTimeOfImpact(btCollisionObject* /*body0*/,btCollisionObject* /*body1*/,const btDispatcherInfo& /*dispatchInfo*/,btManifoldResult* /*resultOut*/) +{ + //not yet + return 1.f; +} diff --git a/thirdparty/bullet/src/BulletSoftBody/btSoftSoftCollisionAlgorithm.h b/thirdparty/bullet/src/BulletSoftBody/btSoftSoftCollisionAlgorithm.h new file mode 100644 index 0000000000..4eab7aea2f --- /dev/null +++ b/thirdparty/bullet/src/BulletSoftBody/btSoftSoftCollisionAlgorithm.h @@ -0,0 +1,69 @@ +/* +Bullet Continuous Collision Detection and Physics Library +Copyright (c) 2003-2006 Erwin Coumans http://continuousphysics.com/Bullet/ + +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_SOFT_SOFT_COLLISION_ALGORITHM_H +#define BT_SOFT_SOFT_COLLISION_ALGORITHM_H + +#include "BulletCollision/BroadphaseCollision/btCollisionAlgorithm.h" +#include "BulletCollision/BroadphaseCollision/btBroadphaseProxy.h" +#include "BulletCollision/BroadphaseCollision/btDispatcher.h" +#include "BulletCollision/CollisionDispatch/btCollisionCreateFunc.h" + +class btPersistentManifold; +class btSoftBody; + +///collision detection between two btSoftBody shapes +class btSoftSoftCollisionAlgorithm : public btCollisionAlgorithm +{ + bool m_ownManifold; + btPersistentManifold* m_manifoldPtr; + +// btSoftBody* m_softBody0; +// btSoftBody* m_softBody1; + + +public: + btSoftSoftCollisionAlgorithm(const btCollisionAlgorithmConstructionInfo& ci) + : btCollisionAlgorithm(ci) {} + + virtual void processCollision (const btCollisionObjectWrapper* body0Wrap,const btCollisionObjectWrapper* body1Wrap,const btDispatcherInfo& dispatchInfo,btManifoldResult* resultOut); + + virtual btScalar calculateTimeOfImpact(btCollisionObject* body0,btCollisionObject* body1,const btDispatcherInfo& dispatchInfo,btManifoldResult* resultOut); + + virtual void getAllContactManifolds(btManifoldArray& manifoldArray) + { + if (m_manifoldPtr && m_ownManifold) + manifoldArray.push_back(m_manifoldPtr); + } + + btSoftSoftCollisionAlgorithm(btPersistentManifold* mf,const btCollisionAlgorithmConstructionInfo& ci,const btCollisionObjectWrapper* body0Wrap,const btCollisionObjectWrapper* body1Wrap); + + virtual ~btSoftSoftCollisionAlgorithm(); + + struct CreateFunc :public btCollisionAlgorithmCreateFunc + { + virtual btCollisionAlgorithm* CreateCollisionAlgorithm(btCollisionAlgorithmConstructionInfo& ci, const btCollisionObjectWrapper* body0Wrap,const btCollisionObjectWrapper* body1Wrap) + { + int bbsize = sizeof(btSoftSoftCollisionAlgorithm); + void* ptr = ci.m_dispatcher1->allocateCollisionAlgorithm(bbsize); + return new(ptr) btSoftSoftCollisionAlgorithm(0,ci,body0Wrap,body1Wrap); + } + }; + +}; + +#endif //BT_SOFT_SOFT_COLLISION_ALGORITHM_H + + diff --git a/thirdparty/bullet/src/BulletSoftBody/btSparseSDF.h b/thirdparty/bullet/src/BulletSoftBody/btSparseSDF.h new file mode 100644 index 0000000000..ba437c28ef --- /dev/null +++ b/thirdparty/bullet/src/BulletSoftBody/btSparseSDF.h @@ -0,0 +1,319 @@ +/* +Bullet Continuous Collision Detection and Physics Library +Copyright (c) 2003-2006 Erwin Coumans http://continuousphysics.com/Bullet/ + +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. +*/ +///btSparseSdf implementation by Nathanael Presson + +#ifndef BT_SPARSE_SDF_H +#define BT_SPARSE_SDF_H + +#include "BulletCollision/CollisionDispatch/btCollisionObject.h" +#include "BulletCollision/NarrowPhaseCollision/btGjkEpa2.h" + +// Modified Paul Hsieh hash +template <const int DWORDLEN> +unsigned int HsiehHash(const void* pdata) +{ + const unsigned short* data=(const unsigned short*)pdata; + unsigned hash=DWORDLEN<<2,tmp; + for(int i=0;i<DWORDLEN;++i) + { + hash += data[0]; + tmp = (data[1]<<11)^hash; + hash = (hash<<16)^tmp; + data += 2; + hash += hash>>11; + } + hash^=hash<<3;hash+=hash>>5; + hash^=hash<<4;hash+=hash>>17; + hash^=hash<<25;hash+=hash>>6; + return(hash); +} + +template <const int CELLSIZE> +struct btSparseSdf +{ + // + // Inner types + // + struct IntFrac + { + int b; + int i; + btScalar f; + }; + struct Cell + { + btScalar d[CELLSIZE+1][CELLSIZE+1][CELLSIZE+1]; + int c[3]; + int puid; + unsigned hash; + const btCollisionShape* pclient; + Cell* next; + }; + // + // Fields + // + + btAlignedObjectArray<Cell*> cells; + btScalar voxelsz; + int puid; + int ncells; + int m_clampCells; + int nprobes; + int nqueries; + + // + // Methods + // + + // + void Initialize(int hashsize=2383, int clampCells = 256*1024) + { + //avoid a crash due to running out of memory, so clamp the maximum number of cells allocated + //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); + Reset(); + } + // + void Reset() + { + for(int i=0,ni=cells.size();i<ni;++i) + { + Cell* pc=cells[i]; + cells[i]=0; + while(pc) + { + Cell* pn=pc->next; + delete pc; + pc=pn; + } + } + voxelsz =0.25; + puid =0; + ncells =0; + nprobes =1; + nqueries =1; + } + // + void GarbageCollect(int lifetime=256) + { + const int life=puid-lifetime; + for(int i=0;i<cells.size();++i) + { + Cell*& root=cells[i]; + Cell* pp=0; + Cell* pc=root; + while(pc) + { + Cell* pn=pc->next; + if(pc->puid<life) + { + if(pp) pp->next=pn; else root=pn; + delete pc;pc=pp;--ncells; + } + pp=pc;pc=pn; + } + } + //printf("GC[%d]: %d cells, PpQ: %f\r\n",puid,ncells,nprobes/(btScalar)nqueries); + nqueries=1; + nprobes=1; + ++puid; ///@todo: Reset puid's when int range limit is reached */ + /* else setup a priority list... */ + } + // + int RemoveReferences(btCollisionShape* pcs) + { + int refcount=0; + for(int i=0;i<cells.size();++i) + { + Cell*& root=cells[i]; + Cell* pp=0; + Cell* pc=root; + while(pc) + { + Cell* pn=pc->next; + if(pc->pclient==pcs) + { + if(pp) pp->next=pn; else root=pn; + delete pc;pc=pp;++refcount; + } + pp=pc;pc=pn; + } + } + return(refcount); + } + // + btScalar Evaluate( const btVector3& x, + const btCollisionShape* shape, + btVector3& normal, + btScalar margin) + { + /* Lookup cell */ + const btVector3 scx=x/voxelsz; + const IntFrac ix=Decompose(scx.x()); + const IntFrac iy=Decompose(scx.y()); + const IntFrac iz=Decompose(scx.z()); + const unsigned h=Hash(ix.b,iy.b,iz.b,shape); + Cell*& root=cells[static_cast<int>(h%cells.size())]; + Cell* c=root; + ++nqueries; + while(c) + { + ++nprobes; + if( (c->hash==h) && + (c->c[0]==ix.b) && + (c->c[1]==iy.b) && + (c->c[2]==iz.b) && + (c->pclient==shape)) + { break; } + else + { c=c->next; } + } + if(!c) + { + ++nprobes; + ++ncells; + //int sz = sizeof(Cell); + if (ncells>m_clampCells) + { + static int numResets=0; + numResets++; +// printf("numResets=%d\n",numResets); + Reset(); + } + + c=new Cell(); + c->next=root;root=c; + c->pclient=shape; + c->hash=h; + c->c[0]=ix.b;c->c[1]=iy.b;c->c[2]=iz.b; + BuildCell(*c); + } + c->puid=puid; + /* Extract infos */ + const int o[]={ ix.i,iy.i,iz.i}; + const btScalar d[]={ c->d[o[0]+0][o[1]+0][o[2]+0], + c->d[o[0]+1][o[1]+0][o[2]+0], + c->d[o[0]+1][o[1]+1][o[2]+0], + c->d[o[0]+0][o[1]+1][o[2]+0], + c->d[o[0]+0][o[1]+0][o[2]+1], + c->d[o[0]+1][o[1]+0][o[2]+1], + c->d[o[0]+1][o[1]+1][o[2]+1], + c->d[o[0]+0][o[1]+1][o[2]+1]}; + /* Normal */ +#if 1 + const btScalar gx[]={ d[1]-d[0],d[2]-d[3], + d[5]-d[4],d[6]-d[7]}; + const btScalar gy[]={ d[3]-d[0],d[2]-d[1], + d[7]-d[4],d[6]-d[5]}; + const btScalar gz[]={ d[4]-d[0],d[5]-d[1], + d[7]-d[3],d[6]-d[2]}; + normal.setX(Lerp( Lerp(gx[0],gx[1],iy.f), + Lerp(gx[2],gx[3],iy.f),iz.f)); + normal.setY(Lerp( Lerp(gy[0],gy[1],ix.f), + Lerp(gy[2],gy[3],ix.f),iz.f)); + normal.setZ(Lerp( Lerp(gz[0],gz[1],ix.f), + Lerp(gz[2],gz[3],ix.f),iy.f)); + normal = normal.normalized(); +#else + normal = btVector3(d[1]-d[0],d[3]-d[0],d[4]-d[0]).normalized(); +#endif + /* Distance */ + const btScalar d0=Lerp(Lerp(d[0],d[1],ix.f), + Lerp(d[3],d[2],ix.f),iy.f); + const btScalar d1=Lerp(Lerp(d[4],d[5],ix.f), + Lerp(d[7],d[6],ix.f),iy.f); + return(Lerp(d0,d1,iz.f)-margin); + } + // + void BuildCell(Cell& c) + { + const btVector3 org=btVector3( (btScalar)c.c[0], + (btScalar)c.c[1], + (btScalar)c.c[2]) * + CELLSIZE*voxelsz; + for(int k=0;k<=CELLSIZE;++k) + { + const btScalar z=voxelsz*k+org.z(); + for(int j=0;j<=CELLSIZE;++j) + { + const btScalar y=voxelsz*j+org.y(); + for(int i=0;i<=CELLSIZE;++i) + { + const btScalar x=voxelsz*i+org.x(); + c.d[i][j][k]=DistanceToShape( btVector3(x,y,z), + c.pclient); + } + } + } + } + // + static inline btScalar DistanceToShape(const btVector3& x, + const btCollisionShape* shape) + { + btTransform unit; + unit.setIdentity(); + if(shape->isConvex()) + { + btGjkEpaSolver2::sResults res; + const btConvexShape* csh=static_cast<const btConvexShape*>(shape); + return(btGjkEpaSolver2::SignedDistance(x,0,csh,unit,res)); + } + return(0); + } + // + static inline IntFrac Decompose(btScalar x) + { + /* That one need a lot of improvements... */ + /* Remove test, faster floor... */ + IntFrac r; + x/=CELLSIZE; + const int o=x<0?(int)(-x+1):0; + x+=o;r.b=(int)x; + const btScalar k=(x-r.b)*CELLSIZE; + r.i=(int)k;r.f=k-r.i;r.b-=o; + return(r); + } + // + static inline btScalar Lerp(btScalar a,btScalar b,btScalar t) + { + return(a+(b-a)*t); + } + + + + // + static inline unsigned int Hash(int x,int y,int z,const btCollisionShape* shape) + { + struct btS + { + int x,y,z; + void* p; + }; + + btS myset; + + myset.x=x;myset.y=y;myset.z=z;myset.p=(void*)shape; + const void* ptr = &myset; + + unsigned int result = HsiehHash<sizeof(btS)/4> (ptr); + + + return result; + } +}; + + +#endif //BT_SPARSE_SDF_H diff --git a/thirdparty/bullet/src/BulletSoftBody/premake4.lua b/thirdparty/bullet/src/BulletSoftBody/premake4.lua new file mode 100644 index 0000000000..ce384de2c8 --- /dev/null +++ b/thirdparty/bullet/src/BulletSoftBody/premake4.lua @@ -0,0 +1,11 @@ + project "BulletSoftBody" + + kind "StaticLib" + + includedirs { + "..", + } + files { + "**.cpp", + "**.h" + }
\ No newline at end of file |