Bug in btGImpactQuantizedBvh::refit function with scaling the mesh

[CyrusGP]

I have a program that uses btGImpactMeshShape to create a mesh shape and when I scale it the collision detection won't work anymore.

But when I remove the below if and call the m_box_set.buildSet() function everything works as expected.

bullet3/src/BulletCollision/Gimpact/btGImpactShape.h

Lines 86 to 89 in 6bb8d11

 if (m_box_set.getNodeCount() == 0) 
 { 
 	m_box_set.buildSet(); 
 } 

I think the bug is in the below function.

bullet3/src/BulletCollision/Gimpact/btGImpactQuantizedBvh.h

Lines 101 to 110 in 6bb8d11

 SIMD_FORCE_INLINE void getNodeBound(int nodeindex, btAABB& bound) const 
 { 
 	bound.m_min = bt_unquantize( 
 		m_node_array[nodeindex].m_quantizedAabbMin, 
 		m_global_bound.m_min, m_bvhQuantization); 
  
 	bound.m_max = bt_unquantize( 
 		m_node_array[nodeindex].m_quantizedAabbMax, 
 		m_global_bound.m_min, m_bvhQuantization); 
 }