code: def coordinates(self, transformed=True, copy=True):
          
          poly = self.polydata(transformed)
          if copy:
              return np.array(vtk_to_numpy(poly.GetPoints().GetData()))
          else:
              return vtk_to_numpy(poly.GetPoints().GetData())
docs: Return the list of vertex coordinates of the input mesh. Same as `actor.getPoints()`.
  
          :param bool transformed: if `False` ignore any previous trasformation applied to the mesh.
          :param bool copy: if `False` return the reference to the points
              so that they can be modified in place.
  
          .. hint:: |align1.py|_