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package require vtk
package require vtkinteraction
# Demonstrate how to use the vtkBoxWidget 3D widget,
# This script uses a 3D box widget to define a "clipping box" to clip some
# simple geometry (a mace). Make sure that you hit the "W" key to activate the widget.
# Create a mace out of filters.
#
vtkSphereSource sphere
vtkConeSource cone
vtkGlyph3D glyph
glyph SetInputConnection [sphere GetOutputPort]
glyph SetSourceConnection [cone GetOutputPort]
glyph SetVectorModeToUseNormal
glyph SetScaleModeToScaleByVector
glyph SetScaleFactor 0.25
# The sphere and spikes are appended into a single polydata. This just makes things
# simpler to manage.
vtkAppendPolyData apd
apd AddInputConnection [glyph GetOutputPort]
apd AddInputConnection [sphere GetOutputPort]
vtkPolyDataMapper maceMapper
maceMapper SetInputConnection [apd GetOutputPort]
vtkLODActor maceActor
maceActor SetMapper maceMapper
maceActor VisibilityOn
# This portion of the code clips the mace with the vtkPlanes implicit function.
# The clipped region is colored green.
vtkPlanes planes
vtkClipPolyData clipper
clipper SetInputConnection [apd GetOutputPort]
clipper SetClipFunction planes
clipper InsideOutOn
vtkPolyDataMapper selectMapper
selectMapper SetInputConnection [clipper GetOutputPort]
vtkLODActor selectActor
selectActor SetMapper selectMapper
[selectActor GetProperty] SetColor 0 1 0
selectActor VisibilityOff
selectActor SetScale 1.01 1.01 1.01
# Create the RenderWindow, Renderer and both Actors
#
vtkRenderer ren1
vtkRenderWindow renWin
renWin AddRenderer ren1
vtkRenderWindowInteractor iren
iren SetRenderWindow renWin
# The SetInteractor method is how 3D widgets are associated with the render
# window interactor. Internally, SetInteractor sets up a bunch of callbacks
# using the Command/Observer mechanism (AddObserver()).
vtkBoxWidget boxWidget
boxWidget SetInteractor iren
boxWidget SetPlaceFactor 1.25
ren1 AddActor maceActor
ren1 AddActor selectActor
# Add the actors to the renderer, set the background and size
#
ren1 SetBackground 0.1 0.2 0.4
renWin SetSize 300 300
# Place the interactor initially. The input to a 3D widget is used to
# initially position and scale the widget. The EndInteractionEvent is
# observed which invokes the SelectPolygons callback.
boxWidget SetInputConnection [glyph GetOutputPort]
boxWidget PlaceWidget
boxWidget AddObserver EndInteractionEvent SelectPolygons
# 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 .
# This does the actual work: updates the vtkPlanes implicit function.
# This in turn causes the pipeline to update.
proc SelectPolygons {} {
boxWidget GetPlanes planes
selectActor VisibilityOn
}
iren Start
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