Bug in btGImpactQuantizedBvh::refit function with scaling the mesh

[kochol]

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);
	}