protected virtual void ReadBoundsInfo( BinaryReader reader )
{
// min abb extent
Vector3 min = ReadVector3( reader );
// max abb extent
Vector3 max = ReadVector3( reader );
// set the mesh's aabb
mesh.BoundingBox = new AxisAlignedBox( min, max );
// set the bounding sphere radius
mesh.BoundingSphereRadius = ReadFloat( reader );
}