code: def mapPointsToCells(self):
          
          p2c = vtk.vtkPointDataToCellData()
          p2c.SetInputData(self.polydata(False))
          p2c.Update()
          return self.updateMesh(p2c.GetOutput())
docs: Transform point data (i.e., data specified per point)
          into cell data (i.e., data specified per cell).
          The method of transformation is based on averaging the data values
          of all points defining a particular cell.
          
          .. hint:: |mesh_map2cell| |mesh_map2cell.py|_