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102 lines
2.6 KiB
102 lines
2.6 KiB
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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vtkPointWidget pointWidget
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pointWidget SetInput [pl3d GetOutput]
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pointWidget AllOff
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pointWidget PlaceWidget
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vtkPolyData point
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pointWidget GetPolyData point
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vtkProbeFilter probe
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probe SetInput point
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probe SetSource [pl3d GetOutput]
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# create glyph
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vtkConeSource cone
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cone SetResolution 16
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vtkGlyph3D glyph
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glyph SetInputConnection [probe GetOutputPort]
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glyph SetSource [cone GetOutput]
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glyph SetVectorModeToUseVector
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glyph SetScaleModeToDataScalingOff
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glyph SetScaleFactor [expr [[pl3d GetOutput] GetLength] * 0.1]
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vtkPolyDataMapper glyphMapper
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glyphMapper SetInputConnection [glyph GetOutputPort]
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vtkActor glyphActor
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glyphActor SetMapper glyphMapper
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glyphActor 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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pointWidget SetInteractor iren
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pointWidget AddObserver EnableEvent BeginInteraction
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pointWidget AddObserver StartInteractionEvent BeginInteraction
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pointWidget 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 glyphActor
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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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pointWidget GetPolyData point
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glyphActor VisibilityOn
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}
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proc ProbeData {} {
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pointWidget GetPolyData point
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}
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