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package require vtk
package require vtkinteraction
vtkDiskSource disk
disk SetRadialResolution 2
disk SetCircumferentialResolution 9
vtkCleanPolyData clean
clean SetInputConnection [disk GetOutputPort]
clean SetTolerance 0.01
vtkExtractPolyDataPiece piece
piece SetInputConnection [clean GetOutputPort]
vtkPLinearExtrusionFilter extrude
extrude SetInputConnection [piece GetOutputPort]
extrude PieceInvariantOn
# Create the RenderWindow, Renderer and both Actors
#
vtkRenderer ren1
vtkRenderWindow renWin
renWin AddRenderer ren1
vtkRenderWindowInteractor iren
iren SetRenderWindow renWin
vtkPolyDataMapper mapper
mapper SetInputConnection [extrude GetOutputPort]
mapper SetNumberOfPieces 2
mapper SetPiece 1
vtkProperty bf
bf SetColor 1 0 0
vtkActor actor
actor SetMapper mapper
[actor GetProperty] SetColor 1 1 0.8
actor SetBackfaceProperty bf
# Add the actors to the renderer, set the background and size
#
ren1 AddActor actor
ren1 SetBackground 0.1 0.2 0.4
renWin SetSize 300 300
# render the image
#
iren AddObserver UserEvent {wm deiconify .vtkInteract}
set cam1 [ren1 GetActiveCamera]
$cam1 Azimuth 20
$cam1 Elevation 40
ren1 ResetCamera
$cam1 Zoom 1.2
iren Initialize
# prevent the tk window from showing up then start the event loop
wm withdraw .
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