text: #!/usr/bin/env python
  import vtk
  from vtk.test import Testing
  from vtk.util.misc import vtkGetDataRoot
  VTK_DATA_ROOT = vtkGetDataRoot()
  
  # Create the RenderWindow, Renderer and both Actors
  #
  ren1 = vtk.vtkRenderer()
  renWin = vtk.vtkRenderWindow()
  renWin.AddRenderer(ren1)
  iren = vtk.vtkRenderWindowInteractor()
  iren.SetRenderWindow(renWin)
  # read data
  #
  pl3d = vtk.vtkMultiBlockPLOT3DReader()
  pl3d.SetXYZFileName("" + str(VTK_DATA_ROOT) + "/Data/combxyz.bin")
  pl3d.SetQFileName("" + str(VTK_DATA_ROOT) + "/Data/combq.bin")
  pl3d.SetScalarFunctionNumber(100)
  pl3d.SetVectorFunctionNumber(202)
  pl3d.Update()
  output = pl3d.GetOutput().GetBlock(0)
  # planes to connect
  plane1 = vtk.vtkStructuredGridGeometryFilter()
  plane1.SetInputData(output)
  plane1.SetExtent(20,20,0,100,0,100)
  conn = vtk.vtkPolyDataConnectivityFilter()
  conn.SetInputConnection(plane1.GetOutputPort())
  conn.ScalarConnectivityOn()
  conn.SetScalarRange(0.19,0.25)
  conn.Update()
  #conn.Print()
  plane1Map = vtk.vtkPolyDataMapper()
  plane1Map.SetInputConnection(conn.GetOutputPort())
  plane1Map.SetScalarRange(output.GetScalarRange())
  plane1Actor = vtk.vtkActor()
  plane1Actor.SetMapper(plane1Map)
  plane1Actor.GetProperty().SetOpacity(0.999)
  # outline
  outline = vtk.vtkStructuredGridOutlineFilter()
  outline.SetInputData(output)
  outlineMapper = vtk.vtkPolyDataMapper()
  outlineMapper.SetInputConnection(outline.GetOutputPort())
  outlineActor = vtk.vtkActor()
  outlineActor.SetMapper(outlineMapper)
  outlineProp = outlineActor.GetProperty()
  outlineProp.SetColor(0,0,0)
  # Add the actors to the renderer, set the background and size
  #
  ren1.AddActor(outlineActor)
  ren1.AddActor(plane1Actor)
  ren1.SetBackground(1,1,1)
  renWin.SetSize(300,300)
  cam1 = vtk.vtkCamera()
  cam1.SetClippingRange(14.29,63.53)
  cam1.SetFocalPoint(8.58522,1.58266,30.6486)
  cam1.SetPosition(37.6808,-20.1298,35.4016)
  cam1.SetViewAngle(30)
  cam1.SetViewUp(-0.0566235,0.140504,0.98846)
  ren1.SetActiveCamera(cam1)
  iren.Initialize()
  # render the image
  #
  # prevent the tk window from showing up then start the event loop
  # --- end of script --
  