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Share the bvh of btBvhTriangleMeshShape's when possible

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Results in decent cell-loading speed up. (only affects bullet versions < 2.83, since we use btScaledBvhTriangleMeshShape for >=2.83)
This commit is contained in:
scrawl 2015-11-30 01:39:41 +01:00
parent d2290a8183
commit e49bce7b40
2 changed files with 12 additions and 3 deletions
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11
components/resource/bulletshape.cpp
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@ -62,7 +62,16 @@ btCollisionShape* BulletShape::duplicateCollisionShape(btCollisionShape *shape)
// 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);
TriangleMeshShape* newShape = new TriangleMeshShape(newMesh, true);
// 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;
}

4
components/resource/bulletshape.hpp
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@ -60,8 +60,8 @@ namespace Resource
// Subclass btBhvTriangleMeshShape to auto-delete the meshInterface
struct TriangleMeshShape : public btBvhTriangleMeshShape
{
TriangleMeshShape(btStridingMeshInterface* meshInterface, bool useQuantizedAabbCompression)
: btBvhTriangleMeshShape(meshInterface, useQuantizedAabbCompression)
TriangleMeshShape(btStridingMeshInterface* meshInterface, bool useQuantizedAabbCompression, bool buildBvh = true)
: btBvhTriangleMeshShape(meshInterface, useQuantizedAabbCompression, buildBvh)
{
}