BulletShape::BulletShape(const BulletShape ©, const osg::CopyOp ©op)
: mCollisionShape(duplicateCollisionShape(copy.mCollisionShape))
, mCollisionBoxHalfExtents(copy.mCollisionBoxHalfExtents)
, mCollisionBoxTranslate(copy.mCollisionBoxTranslate)
, mAnimatedShapes(copy.mAnimatedShapes)
{
}
BulletShapeInstance::BulletShapeInstance(osg::ref_ptr<BulletShape> source)
: BulletShape()
, mSource(source)
{
mCollisionBoxHalfExtents = source->mCollisionBoxHalfExtents;
mCollisionBoxTranslate = source->mCollisionBoxTranslate;
mAnimatedShapes = source->mAnimatedShapes;
if (source->mCollisionShape)
mCollisionShape = duplicateCollisionShape(source->mCollisionShape);
}
btCollisionShape* BulletShape::duplicateCollisionShape(btCollisionShape *shape) const
{
if(shape->isCompound())
{
btCompoundShape *comp = static_cast<btCompoundShape*>(shape);
btCompoundShape *newShape = new btCompoundShape;
int numShapes = comp->getNumChildShapes();
for(int i = 0;i < numShapes;++i)
{
btCollisionShape *child = duplicateCollisionShape(comp->getChildShape(i));
btTransform trans = comp->getChildTransform(i);
newShape->addChildShape(trans, child);
}
return newShape;
}
if(btBvhTriangleMeshShape* trishape = dynamic_cast<btBvhTriangleMeshShape*>(shape))
{
#if BT_BULLET_VERSION >= 283
btScaledBvhTriangleMeshShape* newShape = new btScaledBvhTriangleMeshShape(trishape, btVector3(1.f, 1.f, 1.f));
#else
// work around btScaledBvhTriangleMeshShape bug ( https://code.google.com/p/bullet/issues/detail?id=371 ) in older bullet versions
btTriangleMesh* oldMesh = static_cast<btTriangleMesh*>(trishape->getMeshInterface());
btTriangleMesh* newMesh = new btTriangleMesh(*oldMesh);
// Do not build a new bvh (not needed, since it's the same as the original shape's bvh)
bool buildBvh = true;
if (trishape->getOptimizedBvh())
buildBvh = false;
TriangleMeshShape* newShape = new TriangleMeshShape(newMesh, true, buildBvh);
// Set original shape's bvh via pointer
// The pointer is safe because the BulletShapeInstance keeps a ref_ptr to the original BulletShape
if (!buildBvh)
newShape->setOptimizedBvh(trishape->getOptimizedBvh());
#endif
return newShape;
}
if (btBoxShape* boxshape = dynamic_cast<btBoxShape*>(shape))
{
return new btBoxShape(*boxshape);
}
throw std::logic_error(std::string("Unhandled Bullet shape duplication: ")+shape->getName());
}
