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73 lines
2.0 KiB
73 lines
2.0 KiB
2 years ago
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package require vtk
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package require vtkinteraction
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# demonstrate labeling of contour with scalar value
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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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# Read a slice and contour it
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vtkVolume16Reader v16
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v16 SetDataDimensions 64 64
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[v16 GetOutput] SetOrigin 0.0 0.0 0.0
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v16 SetDataByteOrderToLittleEndian
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v16 SetFilePrefix "$VTK_DATA_ROOT/Data/headsq/quarter"
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v16 SetImageRange 45 45
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v16 SetDataSpacing 3.2 3.2 1.5
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vtkContourFilter iso
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iso SetInputConnection [v16 GetOutputPort]
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iso GenerateValues 6 500 1150
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iso Update
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set numPts [[iso GetOutput] GetNumberOfPoints]
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vtkPolyDataMapper isoMapper
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isoMapper SetInputConnection [iso GetOutputPort]
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isoMapper ScalarVisibilityOn
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eval isoMapper SetScalarRange [[iso GetOutput] GetScalarRange]
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vtkActor isoActor
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isoActor SetMapper isoMapper
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# Subsample the points and label them
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vtkMaskPoints mask
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mask SetInputConnection [iso GetOutputPort]
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mask SetOnRatio [expr $numPts / 50]
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mask SetMaximumNumberOfPoints 50
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mask RandomModeOn
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# Create labels for points - only show visible points
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vtkSelectVisiblePoints visPts
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visPts SetInputConnection [mask GetOutputPort]
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visPts SetRenderer ren1
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vtkLabeledDataMapper ldm
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ldm SetInputConnection [mask GetOutputPort]
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ldm SetLabelFormat "%g"
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ldm SetLabelModeToLabelScalars
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set tprop [ldm GetLabelTextProperty]
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$tprop SetFontFamilyToArial
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$tprop SetFontSize 10
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$tprop SetColor 1 0 0
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vtkActor2D contourLabels
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contourLabels SetMapper ldm
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# Add the actors to the renderer, set the background and size
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#
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ren1 AddActor2D isoActor
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ren1 AddActor2D contourLabels
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ren1 SetBackground 1 1 1
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renWin SetSize 500 500
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renWin Render
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[ren1 GetActiveCamera] Zoom 1.5
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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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# prevent the tk window from showing up then start the event loop
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wm withdraw .
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