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package require vtk
package require vtkinteraction
package require vtktesting
# Create the RenderWindow, Renderer and both Actors
#
vtkRenderer ren1
vtkRenderWindow renWin
renWin SetMultiSamples 0
renWin AddRenderer ren1
vtkRenderWindowInteractor iren
iren SetRenderWindow renWin
# pipeline stuff
#
vtkSphereSource sphere
sphere SetPhiResolution 10
sphere SetThetaResolution 20
vtkTransformCoordinateSystems xform
xform SetInputConnection [sphere GetOutputPort]
xform SetInputCoordinateSystemToWorld
xform SetOutputCoordinateSystemToDisplay
xform SetViewport ren1
vtkGlyphSource2D gs
gs SetGlyphTypeToCircle
gs SetScale 20
gs FilledOff
gs CrossOn
gs Update
# Create a table of glyphs
vtkGlyph2D glypher
glypher SetInputConnection [xform GetOutputPort]
glypher SetSourceData 0 [gs GetOutput]
glypher SetScaleModeToDataScalingOff
vtkPolyDataMapper2D mapper
mapper SetInputConnection [glypher GetOutputPort]
vtkActor2D glyphActor
glyphActor SetMapper mapper
# Add the actors to the renderer, set the background and size
#
ren1 AddActor glyphActor
ren1 SetBackground 0 0 0
renWin SetSize 300 300
iren Initialize
renWin Render
# 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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