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Diffstat (limited to 'thirdparty/bullet/BulletCollision/CollisionShapes/btConvexPointCloudShape.cpp')
| -rw-r--r-- | thirdparty/bullet/BulletCollision/CollisionShapes/btConvexPointCloudShape.cpp | 139 |
1 files changed, 139 insertions, 0 deletions
diff --git a/thirdparty/bullet/BulletCollision/CollisionShapes/btConvexPointCloudShape.cpp b/thirdparty/bullet/BulletCollision/CollisionShapes/btConvexPointCloudShape.cpp new file mode 100644 index 0000000000..ad1d1bf78f --- /dev/null +++ b/thirdparty/bullet/BulletCollision/CollisionShapes/btConvexPointCloudShape.cpp @@ -0,0 +1,139 @@ +/* +Bullet Continuous Collision Detection and Physics Library +Copyright (c) 2003-2009 Erwin Coumans http://bulletphysics.org + +This software is provided 'as-is', without any express or implied warranty. +In no event will the authors be held liable for any damages arising from the use of this software. +Permission is granted to anyone to use this software for any purpose, +including commercial applications, and to alter it and redistribute it freely, +subject to the following restrictions: + +1. The origin of this software must not be misrepresented; you must not claim that you wrote the original software. If you use this software in a product, an acknowledgment in the product documentation would be appreciated but is not required. +2. Altered source versions must be plainly marked as such, and must not be misrepresented as being the original software. +3. This notice may not be removed or altered from any source distribution. +*/ + +#include "btConvexPointCloudShape.h" +#include "BulletCollision/CollisionShapes/btCollisionMargin.h" + +#include "LinearMath/btQuaternion.h" + +void btConvexPointCloudShape::setLocalScaling(const btVector3& scaling) +{ + m_localScaling = scaling; + recalcLocalAabb(); +} + +#ifndef __SPU__ +btVector3 btConvexPointCloudShape::localGetSupportingVertexWithoutMargin(const btVector3& vec0)const +{ + btVector3 supVec(btScalar(0.),btScalar(0.),btScalar(0.)); + btScalar maxDot = btScalar(-BT_LARGE_FLOAT); + + btVector3 vec = vec0; + btScalar lenSqr = vec.length2(); + if (lenSqr < btScalar(0.0001)) + { + vec.setValue(1,0,0); + } else + { + btScalar rlen = btScalar(1.) / btSqrt(lenSqr ); + vec *= rlen; + } + + if( m_numPoints > 0 ) + { + // Here we take advantage of dot(a*b, c) = dot( a, b*c) to do less work. Note this transformation is true mathematically, not numerically. + // btVector3 scaled = vec * m_localScaling; + int index = (int) vec.maxDot( &m_unscaledPoints[0], m_numPoints, maxDot); //FIXME: may violate encapsulation of m_unscaledPoints + return getScaledPoint(index); + } + + return supVec; +} + +void btConvexPointCloudShape::batchedUnitVectorGetSupportingVertexWithoutMargin(const btVector3* vectors,btVector3* supportVerticesOut,int numVectors) const +{ + for( int j = 0; j < numVectors; j++ ) + { + const btVector3& vec = vectors[j] * m_localScaling; // dot( a*c, b) = dot(a, b*c) + btScalar maxDot; + int index = (int) vec.maxDot( &m_unscaledPoints[0], m_numPoints, maxDot); + supportVerticesOut[j][3] = btScalar(-BT_LARGE_FLOAT); + if( 0 <= index ) + { + //WARNING: don't swap next lines, the w component would get overwritten! + supportVerticesOut[j] = getScaledPoint(index); + supportVerticesOut[j][3] = maxDot; + } + } + +} + + + +btVector3 btConvexPointCloudShape::localGetSupportingVertex(const btVector3& vec)const +{ + btVector3 supVertex = localGetSupportingVertexWithoutMargin(vec); + + if ( getMargin()!=btScalar(0.) ) + { + btVector3 vecnorm = vec; + if (vecnorm .length2() < (SIMD_EPSILON*SIMD_EPSILON)) + { + vecnorm.setValue(btScalar(-1.),btScalar(-1.),btScalar(-1.)); + } + vecnorm.normalize(); + supVertex+= getMargin() * vecnorm; + } + return supVertex; +} + + +#endif + + + + + + +//currently just for debugging (drawing), perhaps future support for algebraic continuous collision detection +//Please note that you can debug-draw btConvexHullShape with the Raytracer Demo +int btConvexPointCloudShape::getNumVertices() const +{ + return m_numPoints; +} + +int btConvexPointCloudShape::getNumEdges() const +{ + return 0; +} + +void btConvexPointCloudShape::getEdge(int i,btVector3& pa,btVector3& pb) const +{ + btAssert (0); +} + +void btConvexPointCloudShape::getVertex(int i,btVector3& vtx) const +{ + vtx = m_unscaledPoints[i]*m_localScaling; +} + +int btConvexPointCloudShape::getNumPlanes() const +{ + return 0; +} + +void btConvexPointCloudShape::getPlane(btVector3& ,btVector3& ,int ) const +{ + + btAssert(0); +} + +//not yet +bool btConvexPointCloudShape::isInside(const btVector3& ,btScalar ) const +{ + btAssert(0); + return false; +} + |