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Add API to construct an optimized BVH for btBvhTriangleMeshShape,

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Thanks to Benoit see Issue 340
http://code.google.com/p/bullet/issues/detail?id=340#c0
This commit is contained in:
erwin.coumans
2010-02-03 16:16:46 +00:00
parent f34bb0176c
commit d2a55dee59
2 changed files with 19 additions and 25 deletions
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42
src/BulletCollision/CollisionShapes/btBvhTriangleMeshShape.cpp
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@@ -30,22 +30,9 @@ m_ownsBvh(false)
//construct bvh from meshInterface
#ifndef DISABLE_BVH
btVector3 bvhAabbMin,bvhAabbMax;
if(meshInterface->hasPremadeAabb())
{
meshInterface->getPremadeAabb(&bvhAabbMin, &bvhAabbMax);
}
else
{
meshInterface->calculateAabbBruteForce(bvhAabbMin,bvhAabbMax);
}
if (buildBvh)
{
void* mem = btAlignedAlloc(sizeof(btOptimizedBvh),16);
m_bvh = new (mem) btOptimizedBvh();
m_bvh->build(meshInterface,m_useQuantizedAabbCompression,bvhAabbMin,bvhAabbMax);
m_ownsBvh = true;
buildOptimizedBvh();
}
#endif //DISABLE_BVH
@@ -343,20 +330,25 @@ void btBvhTriangleMeshShape::setLocalScaling(const btVector3& scaling)
if ((getLocalScaling() -scaling).length2() > SIMD_EPSILON)
{
btTriangleMeshShape::setLocalScaling(scaling);
if (m_ownsBvh)
{
m_bvh->~btOptimizedBvh();
btAlignedFree(m_bvh);
}
///m_localAabbMin/m_localAabbMax is already re-calculated in btTriangleMeshShape. We could just scale aabb, but this needs some more work
void* mem = btAlignedAlloc(sizeof(btOptimizedBvh),16);
m_bvh = new(mem) btOptimizedBvh();
//rebuild the bvh...
m_bvh->build(m_meshInterface,m_useQuantizedAabbCompression,m_localAabbMin,m_localAabbMax);
m_ownsBvh = true;
buildOptimizedBvh();
}
}
void btBvhTriangleMeshShape::buildOptimizedBvh()
{
if (m_ownsBvh)
{
m_bvh->~btOptimizedBvh();
btAlignedFree(m_bvh);
}
///m_localAabbMin/m_localAabbMax is already re-calculated in btTriangleMeshShape. We could just scale aabb, but this needs some more work
void* mem = btAlignedAlloc(sizeof(btOptimizedBvh),16);
m_bvh = new(mem) btOptimizedBvh();
//rebuild the bvh...
m_bvh->build(m_meshInterface,m_useQuantizedAabbCompression,m_localAabbMin,m_localAabbMax);
m_ownsBvh = true;
}
void btBvhTriangleMeshShape::setOptimizedBvh(btOptimizedBvh* bvh, const btVector3& scaling)
{
btAssert(!m_bvh);