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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 AddRenderer ren1
vtkRenderWindowInteractor iren
iren SetRenderWindow renWin
vtkSphereSource sphere
sphere SetPhiResolution 15
sphere SetThetaResolution 30
vtkPlane plane
plane SetNormal 1 0 0
vtkCutter cut
cut SetInputConnection [sphere GetOutputPort]
cut SetCutFunction plane
cut GenerateCutScalarsOn
vtkStripper strip
strip SetInputConnection [cut GetOutputPort]
vtkPoints points
points InsertPoint 0 1 0 0
vtkCellArray lines
lines InsertNextCell 2;#number of points
lines InsertCellPoint 0
lines InsertCellPoint 0
vtkPolyData tip
tip SetPoints points
tip SetLines lines
vtkAppendPolyData appendPD
appendPD AddInputConnection [strip GetOutputPort]
appendPD AddInputData tip
# extrude profile to make coverage
#
vtkRuledSurfaceFilter extrude
extrude SetInputConnection [appendPD GetOutputPort]
extrude SetRuledModeToPointWalk
vtkCleanPolyData clean
clean SetInputConnection [extrude GetOutputPort]
clean ConvertPolysToLinesOff
vtkPolyDataMapper mapper
mapper SetInputConnection [clean GetOutputPort]
mapper ScalarVisibilityOff
vtkActor actor
actor SetMapper mapper
[actor GetProperty] SetOpacity .4
ren1 AddActor actor
renWin SetSize 200 200
renWin Render
# render the image
#
iren AddObserver UserEvent {wm deiconify .vtkInteract}
iren Initialize
# prevent the tk window from showing up then start the event loop
wm withdraw .
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