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Diffstat (limited to 'extern/bullet2/BulletCollision/CollisionShapes/btUniformScalingShape.cpp')
| -rw-r--r-- | extern/bullet2/BulletCollision/CollisionShapes/btUniformScalingShape.cpp | 115 |
1 files changed, 115 insertions, 0 deletions
diff --git a/extern/bullet2/BulletCollision/CollisionShapes/btUniformScalingShape.cpp b/extern/bullet2/BulletCollision/CollisionShapes/btUniformScalingShape.cpp new file mode 100644 index 00000000000..8e86f6bf290 --- /dev/null +++ b/extern/bullet2/BulletCollision/CollisionShapes/btUniformScalingShape.cpp @@ -0,0 +1,115 @@ +/* +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 "btUniformScalingShape.h" + +btUniformScalingShape::btUniformScalingShape( btConvexShape* convexChildShape,btScalar uniformScalingFactor): +btConvexShape (), m_childConvexShape(convexChildShape), +m_uniformScalingFactor(uniformScalingFactor) +{ + m_shapeType = UNIFORM_SCALING_SHAPE_PROXYTYPE; +} + +btUniformScalingShape::~btUniformScalingShape() +{ +} + + +btVector3 btUniformScalingShape::localGetSupportingVertexWithoutMargin(const btVector3& vec)const +{ + btVector3 tmpVertex; + tmpVertex = m_childConvexShape->localGetSupportingVertexWithoutMargin(vec); + return tmpVertex*m_uniformScalingFactor; +} + +void btUniformScalingShape::batchedUnitVectorGetSupportingVertexWithoutMargin(const btVector3* vectors,btVector3* supportVerticesOut,int numVectors) const +{ + m_childConvexShape->batchedUnitVectorGetSupportingVertexWithoutMargin(vectors,supportVerticesOut,numVectors); + int i; + for (i=0;i<numVectors;i++) + { + supportVerticesOut[i] = supportVerticesOut[i] * m_uniformScalingFactor; + } +} + + +btVector3 btUniformScalingShape::localGetSupportingVertex(const btVector3& vec)const +{ + btVector3 tmpVertex; + tmpVertex = m_childConvexShape->localGetSupportingVertex(vec); + return tmpVertex*m_uniformScalingFactor; +} + + +void btUniformScalingShape::calculateLocalInertia(btScalar mass,btVector3& inertia) const +{ + + ///this linear upscaling is not realistic, but we don't deal with large mass ratios... + btVector3 tmpInertia; + m_childConvexShape->calculateLocalInertia(mass,tmpInertia); + inertia = tmpInertia * m_uniformScalingFactor; +} + + + ///getAabb's default implementation is brute force, expected derived classes to implement a fast dedicated version +void btUniformScalingShape::getAabb(const btTransform& t,btVector3& aabbMin,btVector3& aabbMax) const +{ + m_childConvexShape->getAabb(t,aabbMin,aabbMax); + btVector3 aabbCenter = (aabbMax+aabbMin)*btScalar(0.5); + btVector3 scaledAabbHalfExtends = (aabbMax-aabbMin)*btScalar(0.5)*m_uniformScalingFactor; + + aabbMin = aabbCenter - scaledAabbHalfExtends; + aabbMax = aabbCenter + scaledAabbHalfExtends; + +} + +void btUniformScalingShape::getAabbSlow(const btTransform& t,btVector3& aabbMin,btVector3& aabbMax) const +{ + m_childConvexShape->getAabbSlow(t,aabbMin,aabbMax); + btVector3 aabbCenter = (aabbMax+aabbMin)*btScalar(0.5); + btVector3 scaledAabbHalfExtends = (aabbMax-aabbMin)*btScalar(0.5)*m_uniformScalingFactor; + + aabbMin = aabbCenter - scaledAabbHalfExtends; + aabbMax = aabbCenter + scaledAabbHalfExtends; +} + +void btUniformScalingShape::setLocalScaling(const btVector3& scaling) +{ + m_childConvexShape->setLocalScaling(scaling); +} + +const btVector3& btUniformScalingShape::getLocalScaling() const +{ + return m_childConvexShape->getLocalScaling(); +} + +void btUniformScalingShape::setMargin(btScalar margin) +{ + m_childConvexShape->setMargin(margin); +} +btScalar btUniformScalingShape::getMargin() const +{ + return m_childConvexShape->getMargin() * m_uniformScalingFactor; +} + +int btUniformScalingShape::getNumPreferredPenetrationDirections() const +{ + return m_childConvexShape->getNumPreferredPenetrationDirections(); +} + +void btUniformScalingShape::getPreferredPenetrationDirection(int index, btVector3& penetrationVector) const +{ + m_childConvexShape->getPreferredPenetrationDirection(index,penetrationVector); +} |