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https://github.com/TES3MP/openmw-tes3mp.git
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118 lines
3.7 KiB
C++
118 lines
3.7 KiB
C++
#include "bulletshape.hpp"
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#include <stdexcept>
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#include <string>
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#include <BulletCollision/CollisionShapes/btBoxShape.h>
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#include <BulletCollision/CollisionShapes/btTriangleMesh.h>
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#include <BulletCollision/CollisionShapes/btScaledBvhTriangleMeshShape.h>
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#include <BulletCollision/CollisionShapes/btCompoundShape.h>
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namespace Resource
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{
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BulletShape::BulletShape()
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: mCollisionShape(NULL)
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{
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}
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BulletShape::BulletShape(const BulletShape ©, const osg::CopyOp ©op)
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: mCollisionShape(duplicateCollisionShape(copy.mCollisionShape))
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, mCollisionBoxHalfExtents(copy.mCollisionBoxHalfExtents)
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, mCollisionBoxTranslate(copy.mCollisionBoxTranslate)
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, mAnimatedShapes(copy.mAnimatedShapes)
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{
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}
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BulletShape::~BulletShape()
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{
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deleteShape(mCollisionShape);
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}
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void BulletShape::deleteShape(btCollisionShape* shape)
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{
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if(shape!=NULL)
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{
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if(shape->isCompound())
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{
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btCompoundShape* ms = static_cast<btCompoundShape*>(shape);
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int a = ms->getNumChildShapes();
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for(int i=0; i <a;i++)
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deleteShape(ms->getChildShape(i));
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}
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delete shape;
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}
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}
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btCollisionShape* BulletShape::duplicateCollisionShape(const btCollisionShape *shape) const
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{
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if(shape->isCompound())
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{
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const btCompoundShape *comp = static_cast<const btCompoundShape*>(shape);
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btCompoundShape *newShape = new btCompoundShape;
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int numShapes = comp->getNumChildShapes();
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for(int i = 0;i < numShapes;++i)
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{
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btCollisionShape *child = duplicateCollisionShape(comp->getChildShape(i));
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btTransform trans = comp->getChildTransform(i);
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newShape->addChildShape(trans, child);
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}
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return newShape;
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}
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if(const btBvhTriangleMeshShape* trishape = dynamic_cast<const btBvhTriangleMeshShape*>(shape))
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{
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#if BT_BULLET_VERSION >= 283
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btScaledBvhTriangleMeshShape* newShape = new btScaledBvhTriangleMeshShape(const_cast<btBvhTriangleMeshShape*>(trishape), btVector3(1.f, 1.f, 1.f));
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#else
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// work around btScaledBvhTriangleMeshShape bug ( https://code.google.com/p/bullet/issues/detail?id=371 ) in older bullet versions
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const btTriangleMesh* oldMesh = static_cast<const btTriangleMesh*>(trishape->getMeshInterface());
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btTriangleMesh* newMesh = new btTriangleMesh(*oldMesh);
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// Do not build a new bvh (not needed, since it's the same as the original shape's bvh)
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btOptimizedBvh* bvh = const_cast<btBvhTriangleMeshShape*>(trishape)->getOptimizedBvh();
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TriangleMeshShape* newShape = new TriangleMeshShape(newMesh, true, bvh == NULL);
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// Set original shape's bvh via pointer
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// The pointer is safe because the BulletShapeInstance keeps a ref_ptr to the original BulletShape
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if (bvh)
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newShape->setOptimizedBvh(bvh);
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#endif
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return newShape;
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}
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if (const btBoxShape* boxshape = dynamic_cast<const btBoxShape*>(shape))
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{
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return new btBoxShape(*boxshape);
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}
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throw std::logic_error(std::string("Unhandled Bullet shape duplication: ")+shape->getName());
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}
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btCollisionShape *BulletShape::getCollisionShape()
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{
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return mCollisionShape;
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}
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osg::ref_ptr<BulletShapeInstance> BulletShape::makeInstance() const
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{
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osg::ref_ptr<BulletShapeInstance> instance (new BulletShapeInstance(this));
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return instance;
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}
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BulletShapeInstance::BulletShapeInstance(osg::ref_ptr<const BulletShape> source)
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: BulletShape()
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, mSource(source)
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{
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mCollisionBoxHalfExtents = source->mCollisionBoxHalfExtents;
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mCollisionBoxTranslate = source->mCollisionBoxTranslate;
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mAnimatedShapes = source->mAnimatedShapes;
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if (source->mCollisionShape)
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mCollisionShape = duplicateCollisionShape(source->mCollisionShape);
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}
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}
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