code: def coords_for_computations(self):
          
  
          # TODO: need to subtract the position offset if a Mesh (in orbit)
          if self._compute_at_vertices:
              if self.pvertices is not None:
                  return self.pvertices - self._pos_center
              else:
                  return self.vertices - self._pos_center
          else:
              return self.centers - self._pos_center
docs: Return the coordinates from the center of the star for each element
          (either centers or vertices depending on the setting in the mesh).