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 | package require vtk
package require vtkinteraction
vtkSimplePointsReader reader
reader SetFileName "$VTK_DATA_ROOT/Data/points.txt"
vtkPolyDataMapper mapper
  mapper SetInputConnection [reader GetOutputPort]
vtkActor actor
  actor SetMapper mapper
  [actor GetProperty] SetPointSize 5
vtkRenderer ren1
vtkRenderWindow renWin
    renWin AddRenderer ren1
vtkRenderWindowInteractor iren
    iren SetRenderWindow renWin
ren1 AddActor actor
renWin SetSize 300 300
iren Initialize
renWin Render
iren AddObserver UserEvent {wm deiconify .vtkInteract}
wm withdraw .
 |