private void HandleMouseClick()
{
Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition);
RaycastHit hit;
bool didRayCastHit = Physics.Raycast(ray, out hit);
// https://answers.unity.com/questions/50279/check-if-layer-is-in-layermask.html
// looking for block collisions only
bool isHitTargetInCollidableLayer =
didRayCastHit ? CollidableLayer == (CollidableLayer | (1 << hit.transform.gameObject.layer)) : false;
if (didRayCastHit && isHitTargetInCollidableLayer)
{
BlockFaceBehaviour blockFace = hit.transform.gameObject.GetComponent <BlockFaceBehaviour>();
BlockFace face = BlockFaceMethods.BlockFaceFromNormal(hit.normal);
if (_faceMap.ContainsKey(blockFace) && face == _faceMap[blockFace])
{
_animator.MoveBlock(blockFace, face);
}
}
}