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package require vtk
package require vtkinteraction
# create pipeline - rectilinear grid
#
vtkRectilinearGridReader rgridReader
rgridReader SetFileName "$VTK_DATA_ROOT/Data/RectGrid2.vtk"
rgridReader Update
vtkRectilinearSynchronizedTemplates contour
contour SetInputConnection [rgridReader GetOutputPort]
contour SetValue 0 1
contour ComputeScalarsOff
contour ComputeNormalsOn
contour ComputeGradientsOn
vtkPolyDataMapper cMapper
cMapper SetInputConnection [contour GetOutputPort]
vtkActor cActor
cActor SetMapper cMapper
# Create the RenderWindow, Renderer and both Actors
#
vtkRenderer ren1
vtkRenderWindow renWin
renWin AddRenderer ren1
renWin SetSize 200 200
vtkRenderWindowInteractor iren
iren SetRenderWindow renWin
ren1 AddActor cActor
iren Initialize
# render the image
#
iren AddObserver UserEvent {wm deiconify .vtkInteract}
# prevent the tk window from showing up then start the event loop
wm withdraw .
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