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package require vtk
package require vtkinteraction
# Demonstrate how to extract polygonal cells with an implicit function
# get the interactor ui
# create a sphere source and actor
#
vtkSphereSource sphere
sphere SetThetaResolution 8
sphere SetPhiResolution 16
sphere SetRadius 1.5
# Extraction stuff - first just pass points
vtkTransform t
t RotateX 90
vtkCylinder cylfunc
cylfunc SetRadius 0.5
cylfunc SetTransform t
vtkExtractPolyDataGeometry extract
extract SetInputConnection [sphere GetOutputPort]
extract SetImplicitFunction cylfunc
extract ExtractBoundaryCellsOn
extract PassPointsOn
vtkPolyDataMapper sphereMapper
sphereMapper SetInputConnection [extract GetOutputPort]
sphereMapper GlobalImmediateModeRenderingOn
vtkActor sphereActor
sphereActor SetMapper sphereMapper
# Extraction stuff - now cull points
vtkExtractPolyDataGeometry extract2
extract2 SetInputConnection [sphere GetOutputPort]
extract2 SetImplicitFunction cylfunc
extract2 ExtractBoundaryCellsOn
extract2 PassPointsOff
vtkPolyDataMapper sphereMapper2
sphereMapper2 SetInputConnection [extract2 GetOutputPort]
vtkActor sphereActor2
sphereActor2 SetMapper sphereMapper2
sphereActor2 AddPosition 2.5 0 0
# Put some glyphs on the points
vtkSphereSource glyphSphere
glyphSphere SetRadius 0.05
vtkGlyph3D glyph
glyph SetInputConnection [extract GetOutputPort]
glyph SetSourceConnection [glyphSphere GetOutputPort]
glyph SetScaleModeToDataScalingOff
vtkPolyDataMapper glyphMapper
glyphMapper SetInputConnection [glyph GetOutputPort]
vtkActor glyphActor
glyphActor SetMapper glyphMapper
vtkGlyph3D glyph2
glyph2 SetInputConnection [extract2 GetOutputPort]
glyph2 SetSourceConnection [glyphSphere GetOutputPort]
glyph2 SetScaleModeToDataScalingOff
vtkPolyDataMapper glyphMapper2
glyphMapper2 SetInputConnection [glyph2 GetOutputPort]
vtkActor glyphActor2
glyphActor2 SetMapper glyphMapper2
glyphActor2 AddPosition 2.5 0 0
# Create the RenderWindow, Renderer and both Actors
#
vtkRenderer ren1
vtkRenderWindow renWin
renWin AddRenderer ren1
renWin SetWindowName "vtk - extractPolyData"
vtkRenderWindowInteractor iren
iren SetRenderWindow renWin
# Add the actors to the renderer, set the background and size
#
ren1 AddActor sphereActor
ren1 AddActor glyphActor
ren1 AddActor sphereActor2
ren1 AddActor glyphActor2
ren1 ResetCamera
[ren1 GetActiveCamera] Azimuth 30
ren1 SetBackground 0.1 0.2 0.4
renWin SetSize 300 300
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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