public void CloneTo(ShapeObject so, bool geometryOnly = true)
 {
     so.transform.position      = transform.position;
     so.transform.up            = transform.up;
     so.transform.localScale    = transform.localScale;
     so.transform.localRotation = transform.localRotation;
     so.meshable = (Meshable)(meshable.Clone());
     so.GetComponent <MeshFilter>().mesh = GetComponent <MeshFilter>().mesh;
     if (!geometryOnly)
     {
         so.name = name;
         so.step = step;
         //so.parentRule = parentRule;
     }
 }