text: #!/usr/bin/env python
  import vtk
  from vtk.util.misc import vtkGetDataRoot
  VTK_DATA_ROOT = vtkGetDataRoot()
  
  # Read some AVS UCD data in ASCII form
  r = vtk.vtkAVSucdReader()
  r.SetFileName("" + str(VTK_DATA_ROOT) + "/Data/cellsnd.ascii.inp")
  AVSMapper = vtk.vtkDataSetMapper()
  AVSMapper.SetInputConnection(r.GetOutputPort())
  AVSActor = vtk.vtkActor()
  AVSActor.SetMapper(AVSMapper)
  # Read some AVS UCD data in binary form
  r2 = vtk.vtkAVSucdReader()
  r2.SetFileName("" + str(VTK_DATA_ROOT) + "/Data/cellsnd.bin.inp")
  AVSMapper2 = vtk.vtkDataSetMapper()
  AVSMapper2.SetInputConnection(r2.GetOutputPort())
  AVSActor2 = vtk.vtkActor()
  AVSActor2.SetMapper(AVSMapper2)
  AVSActor2.AddPosition(5,0,0)
  # Create the RenderWindow, Renderer and both Actors
  #
  ren1 = vtk.vtkRenderer()
  renWin = vtk.vtkRenderWindow()
  renWin.AddRenderer(ren1)
  iren = vtk.vtkRenderWindowInteractor()
  iren.SetRenderWindow(renWin)
  # Add the actors to the renderer, set the background and size
  #
  ren1.AddActor(AVSActor)
  ren1.AddActor(AVSActor2)
  renWin.SetSize(300,150)
  iren.Initialize()
  renWin.Render()
  ren1.GetActiveCamera().Zoom(2)
  # prevent the tk window from showing up then start the event loop
  # --- end of script --
  