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95 lines
2.5 KiB
95 lines
2.5 KiB
2 years ago
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package require vtk
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package require vtkinteraction
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package require vtktesting
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# This example demonstrates how to use the vtkPlaneWidget to probe
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# a dataset and then generate contours on the probed data.
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# Start by loading some data.
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#
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vtkPLOT3DReader pl3d
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pl3d SetXYZFileName "$VTK_DATA_ROOT/Data/combxyz.bin"
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pl3d SetQFileName "$VTK_DATA_ROOT/Data/combq.bin"
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pl3d SetScalarFunctionNumber 100
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pl3d SetVectorFunctionNumber 202
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pl3d Update
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# The plane widget is used probe the dataset.
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#
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vtkPlaneWidget planeWidget
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planeWidget SetInput [pl3d GetOutput]
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planeWidget NormalToXAxisOn
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planeWidget SetResolution 20
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planeWidget SetRepresentationToOutline
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planeWidget PlaceWidget
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vtkPolyData plane
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planeWidget GetPolyData plane
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vtkProbeFilter probe
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probe SetInput plane
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probe SetSource [pl3d GetOutput]
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vtkPolyDataMapper contourMapper
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contourMapper SetInputConnection [probe GetOutputPort]
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eval contourMapper SetScalarRange [[pl3d GetOutput] GetScalarRange]
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vtkActor contourActor
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contourActor SetMapper contourMapper
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contourActor VisibilityOff
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# An outline is shown for context.
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vtkStructuredGridOutlineFilter outline
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outline SetInputConnection [pl3d GetOutputPort]
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vtkPolyDataMapper outlineMapper
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outlineMapper SetInputConnection [outline GetOutputPort]
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vtkActor outlineActor
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outlineActor SetMapper outlineMapper
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# Create the RenderWindow, Renderer and both Actors
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#
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vtkRenderer ren1
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vtkRenderWindow renWin
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renWin AddRenderer ren1
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vtkRenderWindowInteractor iren
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iren SetRenderWindow renWin
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# Associate the line widget with the interactor
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planeWidget SetInteractor iren
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planeWidget AddObserver EnableEvent BeginInteraction
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planeWidget AddObserver StartInteractionEvent BeginInteraction
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planeWidget AddObserver InteractionEvent ProbeData
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# Add the actors to the renderer, set the background and size
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#
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ren1 AddActor outlineActor
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ren1 AddActor contourActor
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ren1 SetBackground 1 1 1
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renWin SetSize 300 300
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ren1 SetBackground 0.1 0.2 0.4
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set cam1 [ren1 GetActiveCamera]
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$cam1 SetClippingRange 3.95297 50
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$cam1 SetFocalPoint 9.71821 0.458166 29.3999
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$cam1 SetPosition 2.7439 -37.3196 38.7167
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$cam1 SetViewUp -0.16123 0.264271 0.950876
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# render the image
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#
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iren AddObserver UserEvent {wm deiconify .vtkInteract}
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renWin Render
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# Prevent the tk window from showing up then start the event loop.
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wm withdraw .
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# Actually generate contour lines.
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proc BeginInteraction {} {
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planeWidget GetPolyData plane
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contourActor VisibilityOn
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}
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proc ProbeData {} {
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planeWidget GetPolyData plane
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}
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