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Diffstat (limited to 'extern/bullet2/BulletCollision/CollisionShapes/btCompoundShape.cpp')
| -rw-r--r-- | extern/bullet2/BulletCollision/CollisionShapes/btCompoundShape.cpp | 323 |
1 files changed, 0 insertions, 323 deletions
diff --git a/extern/bullet2/BulletCollision/CollisionShapes/btCompoundShape.cpp b/extern/bullet2/BulletCollision/CollisionShapes/btCompoundShape.cpp deleted file mode 100644 index 36906a75f34..00000000000 --- a/extern/bullet2/BulletCollision/CollisionShapes/btCompoundShape.cpp +++ /dev/null @@ -1,323 +0,0 @@ -/* -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 "btCompoundShape.h" -#include "btCollisionShape.h" -#include "BulletCollision/BroadphaseCollision/btDbvt.h" -#include "LinearMath/btSerializer.h" - -btCompoundShape::btCompoundShape(bool enableDynamicAabbTree) -: m_localAabbMin(btScalar(BT_LARGE_FLOAT),btScalar(BT_LARGE_FLOAT),btScalar(BT_LARGE_FLOAT)), -m_localAabbMax(btScalar(-BT_LARGE_FLOAT),btScalar(-BT_LARGE_FLOAT),btScalar(-BT_LARGE_FLOAT)), -m_dynamicAabbTree(0), -m_updateRevision(1), -m_collisionMargin(btScalar(0.)), -m_localScaling(btScalar(1.),btScalar(1.),btScalar(1.)) -{ - m_shapeType = COMPOUND_SHAPE_PROXYTYPE; - - if (enableDynamicAabbTree) - { - void* mem = btAlignedAlloc(sizeof(btDbvt),16); - m_dynamicAabbTree = new(mem) btDbvt(); - btAssert(mem==m_dynamicAabbTree); - } -} - - -btCompoundShape::~btCompoundShape() -{ - if (m_dynamicAabbTree) - { - m_dynamicAabbTree->~btDbvt(); - btAlignedFree(m_dynamicAabbTree); - } -} - -void btCompoundShape::addChildShape(const btTransform& localTransform,btCollisionShape* shape) -{ - m_updateRevision++; - //m_childTransforms.push_back(localTransform); - //m_childShapes.push_back(shape); - btCompoundShapeChild child; - child.m_transform = localTransform; - child.m_childShape = shape; - child.m_childShapeType = shape->getShapeType(); - child.m_childMargin = shape->getMargin(); - - - //extend the local aabbMin/aabbMax - btVector3 localAabbMin,localAabbMax; - shape->getAabb(localTransform,localAabbMin,localAabbMax); - for (int i=0;i<3;i++) - { - if (m_localAabbMin[i] > localAabbMin[i]) - { - m_localAabbMin[i] = localAabbMin[i]; - } - if (m_localAabbMax[i] < localAabbMax[i]) - { - m_localAabbMax[i] = localAabbMax[i]; - } - - } - if (m_dynamicAabbTree) - { - const btDbvtVolume bounds=btDbvtVolume::FromMM(localAabbMin,localAabbMax); - int index = m_children.size(); - child.m_node = m_dynamicAabbTree->insert(bounds,(void*)index); - } - - m_children.push_back(child); - -} - -void btCompoundShape::updateChildTransform(int childIndex, const btTransform& newChildTransform) -{ - m_children[childIndex].m_transform = newChildTransform; - - if (m_dynamicAabbTree) - { - ///update the dynamic aabb tree - btVector3 localAabbMin,localAabbMax; - m_children[childIndex].m_childShape->getAabb(newChildTransform,localAabbMin,localAabbMax); - ATTRIBUTE_ALIGNED16(btDbvtVolume) bounds=btDbvtVolume::FromMM(localAabbMin,localAabbMax); - //int index = m_children.size()-1; - m_dynamicAabbTree->update(m_children[childIndex].m_node,bounds); - } - - recalculateLocalAabb(); -} - -void btCompoundShape::removeChildShapeByIndex(int childShapeIndex) -{ - m_updateRevision++; - btAssert(childShapeIndex >=0 && childShapeIndex < m_children.size()); - if (m_dynamicAabbTree) - { - m_dynamicAabbTree->remove(m_children[childShapeIndex].m_node); - } - m_children.swap(childShapeIndex,m_children.size()-1); - m_children.pop_back(); - -} - - - -void btCompoundShape::removeChildShape(btCollisionShape* shape) -{ - m_updateRevision++; - // Find the children containing the shape specified, and remove those children. - //note: there might be multiple children using the same shape! - for(int i = m_children.size()-1; i >= 0 ; i--) - { - if(m_children[i].m_childShape == shape) - { - removeChildShapeByIndex(i); - } - } - - - - recalculateLocalAabb(); -} - -void btCompoundShape::recalculateLocalAabb() -{ - // Recalculate the local aabb - // Brute force, it iterates over all the shapes left. - - m_localAabbMin = btVector3(btScalar(BT_LARGE_FLOAT),btScalar(BT_LARGE_FLOAT),btScalar(BT_LARGE_FLOAT)); - m_localAabbMax = btVector3(btScalar(-BT_LARGE_FLOAT),btScalar(-BT_LARGE_FLOAT),btScalar(-BT_LARGE_FLOAT)); - - //extend the local aabbMin/aabbMax - for (int j = 0; j < m_children.size(); j++) - { - btVector3 localAabbMin,localAabbMax; - m_children[j].m_childShape->getAabb(m_children[j].m_transform, localAabbMin, localAabbMax); - for (int i=0;i<3;i++) - { - if (m_localAabbMin[i] > localAabbMin[i]) - m_localAabbMin[i] = localAabbMin[i]; - if (m_localAabbMax[i] < localAabbMax[i]) - m_localAabbMax[i] = localAabbMax[i]; - } - } -} - -///getAabb's default implementation is brute force, expected derived classes to implement a fast dedicated version -void btCompoundShape::getAabb(const btTransform& trans,btVector3& aabbMin,btVector3& aabbMax) const -{ - btVector3 localHalfExtents = btScalar(0.5)*(m_localAabbMax-m_localAabbMin); - btVector3 localCenter = btScalar(0.5)*(m_localAabbMax+m_localAabbMin); - - //avoid an illegal AABB when there are no children - if (!m_children.size()) - { - localHalfExtents.setValue(0,0,0); - localCenter.setValue(0,0,0); - } - localHalfExtents += btVector3(getMargin(),getMargin(),getMargin()); - - - btMatrix3x3 abs_b = trans.getBasis().absolute(); - - btVector3 center = trans(localCenter); - - btVector3 extent = btVector3(abs_b[0].dot(localHalfExtents), - abs_b[1].dot(localHalfExtents), - abs_b[2].dot(localHalfExtents)); - aabbMin = center-extent; - aabbMax = center+extent; - -} - -void btCompoundShape::calculateLocalInertia(btScalar mass,btVector3& inertia) const -{ - //approximation: take the inertia from the aabb for now - btTransform ident; - ident.setIdentity(); - btVector3 aabbMin,aabbMax; - getAabb(ident,aabbMin,aabbMax); - - btVector3 halfExtents = (aabbMax-aabbMin)*btScalar(0.5); - - btScalar lx=btScalar(2.)*(halfExtents.x()); - btScalar ly=btScalar(2.)*(halfExtents.y()); - btScalar lz=btScalar(2.)*(halfExtents.z()); - - inertia[0] = mass/(btScalar(12.0)) * (ly*ly + lz*lz); - inertia[1] = mass/(btScalar(12.0)) * (lx*lx + lz*lz); - inertia[2] = mass/(btScalar(12.0)) * (lx*lx + ly*ly); - -} - - - - -void btCompoundShape::calculatePrincipalAxisTransform(btScalar* masses, btTransform& principal, btVector3& inertia) const -{ - int n = m_children.size(); - - btScalar totalMass = 0; - btVector3 center(0, 0, 0); - int k; - - for (k = 0; k < n; k++) - { - center += m_children[k].m_transform.getOrigin() * masses[k]; - totalMass += masses[k]; - } - center /= totalMass; - principal.setOrigin(center); - - btMatrix3x3 tensor(0, 0, 0, 0, 0, 0, 0, 0, 0); - for ( k = 0; k < n; k++) - { - btVector3 i; - m_children[k].m_childShape->calculateLocalInertia(masses[k], i); - - const btTransform& t = m_children[k].m_transform; - btVector3 o = t.getOrigin() - center; - - //compute inertia tensor in coordinate system of compound shape - btMatrix3x3 j = t.getBasis().transpose(); - j[0] *= i[0]; - j[1] *= i[1]; - j[2] *= i[2]; - j = t.getBasis() * j; - - //add inertia tensor - tensor[0] += j[0]; - tensor[1] += j[1]; - tensor[2] += j[2]; - - //compute inertia tensor of pointmass at o - btScalar o2 = o.length2(); - j[0].setValue(o2, 0, 0); - j[1].setValue(0, o2, 0); - j[2].setValue(0, 0, o2); - j[0] += o * -o.x(); - j[1] += o * -o.y(); - j[2] += o * -o.z(); - - //add inertia tensor of pointmass - tensor[0] += masses[k] * j[0]; - tensor[1] += masses[k] * j[1]; - tensor[2] += masses[k] * j[2]; - } - - tensor.diagonalize(principal.getBasis(), btScalar(0.00001), 20); - inertia.setValue(tensor[0][0], tensor[1][1], tensor[2][2]); -} - - - -void btCompoundShape::setLocalScaling(const btVector3& scaling) -{ - - for(int i = 0; i < m_children.size(); i++) - { - btTransform childTrans = getChildTransform(i); - btVector3 childScale = m_children[i].m_childShape->getLocalScaling(); -// childScale = childScale * (childTrans.getBasis() * scaling); - childScale = childScale * scaling / m_localScaling; - m_children[i].m_childShape->setLocalScaling(childScale); - childTrans.setOrigin((childTrans.getOrigin())*scaling); - updateChildTransform(i, childTrans); - recalculateLocalAabb(); - } - m_localScaling = scaling; -} - - - - -///fills the dataBuffer and returns the struct name (and 0 on failure) -const char* btCompoundShape::serialize(void* dataBuffer, btSerializer* serializer) const -{ - - btCompoundShapeData* shapeData = (btCompoundShapeData*) dataBuffer; - btCollisionShape::serialize(&shapeData->m_collisionShapeData, serializer); - - shapeData->m_collisionMargin = float(m_collisionMargin); - shapeData->m_numChildShapes = m_children.size(); - shapeData->m_childShapePtr = 0; - if (shapeData->m_numChildShapes) - { - btChunk* chunk = serializer->allocate(sizeof(btCompoundShapeChildData),shapeData->m_numChildShapes); - btCompoundShapeChildData* memPtr = (btCompoundShapeChildData*)chunk->m_oldPtr; - shapeData->m_childShapePtr = (btCompoundShapeChildData*)serializer->getUniquePointer(memPtr); - - for (int i=0;i<shapeData->m_numChildShapes;i++,memPtr++) - { - memPtr->m_childMargin = float(m_children[i].m_childMargin); - memPtr->m_childShape = (btCollisionShapeData*)serializer->getUniquePointer(m_children[i].m_childShape); - //don't serialize shapes that already have been serialized - if (!serializer->findPointer(m_children[i].m_childShape)) - { - btChunk* chunk = serializer->allocate(m_children[i].m_childShape->calculateSerializeBufferSize(),1); - const char* structType = m_children[i].m_childShape->serialize(chunk->m_oldPtr,serializer); - serializer->finalizeChunk(chunk,structType,BT_SHAPE_CODE,m_children[i].m_childShape); - } - - memPtr->m_childShapeType = m_children[i].m_childShapeType; - m_children[i].m_transform.serializeFloat(memPtr->m_transform); - } - serializer->finalizeChunk(chunk,"btCompoundShapeChildData",BT_ARRAY_CODE,chunk->m_oldPtr); - } - return "btCompoundShapeData"; -} - |