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package require vtk
package require vtkinteraction
package require vtktesting
#
# Demonstrate the use of clipping and capping on polyhedral data
#
# create a sphere and clip it
#
vtkSphereSource sphere
sphere SetRadius 1
sphere SetPhiResolution 10
sphere SetThetaResolution 10
vtkPlane plane
plane SetOrigin 0 0 0
plane SetNormal -1 -1 0
vtkClipPolyData clipper
clipper SetInputConnection [sphere GetOutputPort]
clipper SetClipFunction plane
clipper GenerateClipScalarsOn
clipper GenerateClippedOutputOn
clipper SetValue 0
vtkPolyDataMapper clipMapper
clipMapper SetInputConnection [clipper GetOutputPort]
clipMapper ScalarVisibilityOff
vtkProperty backProp
eval backProp SetDiffuseColor $tomato
vtkActor clipActor
clipActor SetMapper clipMapper
eval [clipActor GetProperty] SetColor $peacock
clipActor SetBackfaceProperty backProp
# now extract feature edges
vtkFeatureEdges boundaryEdges
boundaryEdges SetInputConnection [clipper GetOutputPort]
boundaryEdges BoundaryEdgesOn
boundaryEdges FeatureEdgesOff
boundaryEdges NonManifoldEdgesOff
vtkCleanPolyData boundaryClean
boundaryClean SetInputConnection [boundaryEdges GetOutputPort]
vtkStripper boundaryStrips
boundaryStrips SetInputConnection [boundaryClean GetOutputPort]
boundaryStrips Update
vtkPolyData boundaryPoly
boundaryPoly SetPoints [[boundaryStrips GetOutput] GetPoints]
boundaryPoly SetPolys [[boundaryStrips GetOutput] GetLines]
vtkTriangleFilter boundaryTriangles
boundaryTriangles SetInput boundaryPoly
vtkPolyDataMapper boundaryMapper
boundaryMapper SetInputConnection [boundaryTriangles GetOutputPort]
vtkActor boundaryActor
boundaryActor SetMapper boundaryMapper
eval [boundaryActor GetProperty] SetColor $banana
# Create graphics stuff
#
vtkRenderer ren1
vtkRenderWindow renWin
renWin AddRenderer ren1
vtkRenderWindowInteractor iren
iren SetRenderWindow renWin
# Add the actors to the renderer, set the background and size
#
ren1 AddActor clipActor
ren1 AddActor boundaryActor
ren1 SetBackground 1 1 1
ren1 ResetCamera
[ren1 GetActiveCamera] Azimuth 30
[ren1 GetActiveCamera] Elevation 30
[ren1 GetActiveCamera] Dolly 1.2
ren1 ResetCameraClippingRange
renWin SetSize 300 300
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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