code: def clip_with_plane(self, origin, normal, value=0, inplace=False):
          
  
          plane = vtk.vtkPlane()
          plane.SetOrigin(origin)
          plane.SetNormal(normal)
          plane.Modified()
  
          clip = vtk.vtkClipPolyData()
          clip.SetValue(value)
          clip.GenerateClippedOutputOn()
          clip.SetClipFunction(plane)
  
          clip.SetInputData(self)
          clip.Update()
  
          mesh = _get_output(clip)
          if inplace:
              self.overwrite(mesh)
          else:
              return mesh
docs: Clip a vtki.PolyData or vtk.vtkPolyData with a plane.
  
          Can be used to open a mesh which has been closed along a well-defined
          plane.
  
          Parameters
          ----------
          origin : numpy.ndarray
              3D point through which plane passes. Defines the plane together with
              normal parameter.
  
          normal : numpy.ndarray
              3D vector defining plane normal.
  
          value : float, optional
              Scalar clipping value. The default value is 0.0.
  
          inplace : bool, optional
              Updates mesh in-place while returning nothing.
  
          Returns
          -------
          mesh : vtki.PolyData
              Updated mesh with cell and point normals if inplace=False. Otherwise None.
  
          Notes
          -----
          Not guaranteed to produce a manifold output.