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package require vtk
package require vtkinteraction
# Demonstrate how to use the vtkBoxWidget to translate, scale, and rotate actors.
# The basic idea is that the box widget controls an actor's transform. A callback
# which modifies the transform is invoked as the box widget is manipulated.
# Start by creating some simple geometry; in this case a mace.
vtkSphereSource sphere
vtkConeSource cone
vtkGlyph3D glyph
glyph SetInputConnection [sphere GetOutputPort]
glyph SetSource [cone GetOutput]
glyph SetVectorModeToUseNormal
glyph SetScaleModeToScaleByVector
glyph SetScaleFactor 0.25
vtkAppendPolyData appendData
appendData AddInput [glyph GetOutput]
appendData AddInput [sphere GetOutput]
vtkPolyDataMapper maceMapper
maceMapper SetInputConnection [appendData GetOutputPort]
vtkLODActor maceActor
maceActor SetMapper maceMapper
maceActor VisibilityOn
# Create the RenderWindow, Renderer and both Actors
#
vtkRenderer ren1
vtkRenderWindow renWin
renWin AddRenderer ren1
vtkRenderWindowInteractor iren
iren SetRenderWindow renWin
# The box widget observes the events invoked by the render window interactor.
# These events come from user interaction in the render window.
vtkBoxWidget boxWidget
boxWidget SetInteractor iren
boxWidget SetPlaceFactor 1.25
# Add the actors to the renderer, set the background and window size.
#
ren1 AddActor maceActor
ren1 SetBackground 0.1 0.2 0.4
renWin SetSize 300 300
# Place the interactor initially. The actor is used to place and scale
# the interactor. An observer is added to the box widget to watch for
# interaction events. This event is captured and used to set the
# transformation matrix of the actor.
boxWidget SetProp3D maceActor
boxWidget PlaceWidget
boxWidget AddObserver InteractionEvent TransformActor
# Support the "u" keypress user event (pops up a Tcl interpreter).
#
iren AddObserver UserEvent {wm deiconify .vtkInteract}
iren Initialize
# prevent the tk window from showing up then start the event loop
wm withdraw .
# As the box widget is interacted with, it produces a transformation
# matrix that is set on the actor.
vtkTransform t
proc TransformActor {} {
boxWidget GetTransform t
maceActor SetUserTransform t
}
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