new_contents: #!/usr/bin/env python
  
  import vtk
  
  def main():
      colors = vtk.vtkNamedColors()
      
      # Create the polydata geometry
      sphereSource = vtk.vtkSphereSource()
      sphereSource.Update()
      
      # Set up the actor to display the untransformed polydata
      originalMapper = vtk.vtkPolyDataMapper()
      originalMapper.SetInputConnection(sphereSource.GetOutputPort())
      
      originalActor = vtk.vtkActor()
      originalActor.SetMapper(originalMapper)
      originalActor.GetProperty().SetColor(colors.GetColor3d("blue"))
      
      # Set up the transform filter
      translation = vtk.vtkTransform()
      translation.Translate(1.0, 2.0, 3.0)
      
      transformFilter = vtk.vtkTransformPolyDataFilter()
      transformFilter.SetInputConnection(sphereSource.GetOutputPort())
      transformFilter.SetTransform(translation)
      transformFilter.Update()
      
      # Set up the actor to display the transformed polydata
      transformedMapper = vtk.vtkPolyDataMapper()
      transformedMapper.SetInputConnection(transformFilter.GetOutputPort())
      
      transformedActor = vtk.vtkActor()
      transformedActor.SetMapper(transformedMapper)
      transformedActor.GetProperty().SetColor(colors.GetColor3d("red"))
      
      # Set up the rest of the visualization pipeline
      renderer = vtk.vtkRenderer()
      renderer.AddActor(originalActor)
      renderer.AddActor(transformedActor)
      renderer.SetBackground(colors.GetColor3d("green")) # Set renderer's background color to green
      
      renderWindow = vtk.vtkRenderWindow()
      renderWindow.AddRenderer(renderer)
      renderWindowInteractor = vtk.vtkRenderWindowInteractor()
      renderWindowInteractor.SetRenderWindow(renderWindow)
      renderWindowInteractor.Start()
  	
  if __name__ == '__main__':
      main()
  
subject: Create TransformPolyData.py