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151 lines
4.1 KiB
151 lines
4.1 KiB
package require vtk
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package require vtkinteraction
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package require vtktesting
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# Demonstrate how to use structured grid blanking with an image. There are two
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# techniques demonstrated: one uses an image to perform the blanking;
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# the other uses scalar values to do the same thing. Both images should
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# be identical.
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#
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# get the interactor ui
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# create pipeline - start by extracting a single plane from the grid
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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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vtkExtractGrid plane
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plane SetInputConnection [pl3d GetOutputPort]
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plane SetVOI 0 57 0 33 0 0
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plane Update
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# Create some data to use for the (image) blanking
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#
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vtkImageData blankImage
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blankImage SetScalarTypeToUnsignedChar
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blankImage SetDimensions 57 33 1
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blankImage AllocateScalars
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[[blankImage GetPointData] GetScalars] SetName "blankScalars"
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set blanking [[blankImage GetPointData] GetScalars]
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set numBlanks [expr 57*33]
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for {set i 0} {$i<$numBlanks} {incr i} {
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$blanking SetComponent $i 0 1
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}
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# Manually blank out areas corresponding to dilution holes
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$blanking SetComponent 318 0 0
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$blanking SetComponent 945 0 0
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$blanking SetComponent 1572 0 0
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$blanking SetComponent 641 0 0
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$blanking SetComponent 1553 0 0
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# The first blanking technique uses the image to set the blanking values
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#
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vtkBlankStructuredGridWithImage blankIt
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blankIt SetInputConnection [plane GetOutputPort]
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blankIt SetBlankingInput blankImage
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vtkStructuredGridGeometryFilter blankedPlane
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blankedPlane SetInputConnection [blankIt GetOutputPort]
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blankedPlane SetExtent 0 100 0 100 0 0
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vtkPolyDataMapper planeMapper
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planeMapper SetInputConnection [blankedPlane GetOutputPort]
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planeMapper SetScalarRange 0.197813 0.710419
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vtkActor planeActor
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planeActor SetMapper planeMapper
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# The second blanking technique uses grid data values to create the blanking.
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# Here we borrow the image data and threshold on that.
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#
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vtkStructuredGrid anotherGrid
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anotherGrid CopyStructure [plane GetOutput]
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[anotherGrid GetPointData] SetScalars [[blankImage GetPointData] GetScalars]
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vtkBlankStructuredGrid blankGrid
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blankGrid SetInput anotherGrid
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blankGrid SetArrayName "blankScalars"
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blankGrid SetMinBlankingValue -0.5
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blankGrid SetMaxBlankingValue 0.5
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vtkStructuredGridGeometryFilter blankedPlane2
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blankedPlane2 SetInputConnection [blankGrid GetOutputPort]
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blankedPlane2 SetExtent 0 100 0 100 0 0
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vtkPolyDataMapper planeMapper2
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planeMapper2 SetInputConnection [blankedPlane2 GetOutputPort]
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planeMapper2 SetScalarRange 0.197813 0.710419
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vtkActor planeActor2
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planeActor2 SetMapper planeMapper2
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# An outline around the data
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#
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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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eval [outlineActor GetProperty] SetColor $black
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vtkPolyDataMapper outlineMapper2
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outlineMapper2 SetInputConnection [outline GetOutputPort]
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vtkActor outlineActor2
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outlineActor2 SetMapper outlineMapper2
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eval [outlineActor2 GetProperty] SetColor $black
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# create planes
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# Create the RenderWindow, Renderer and both Actors
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#
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vtkRenderer ren1
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ren1 SetViewport 0 0 0.5 1
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vtkRenderer ren2
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ren2 SetViewport 0.5 0 1 1
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vtkRenderWindow renWin
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renWin AddRenderer ren1
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renWin AddRenderer ren2
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vtkRenderWindowInteractor iren
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iren SetRenderWindow renWin
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# Add the actors to the renderer, set the background and size
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#
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ren1 AddActor outlineActor
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ren1 AddActor planeActor
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ren2 AddActor outlineActor2
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ren2 AddActor planeActor2
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ren1 SetBackground 1 1 1
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ren2 SetBackground 1 1 1
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renWin SetSize 500 250
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set cam1 [ren1 GetActiveCamera]
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$cam1 SetClippingRange 3.95297 50
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$cam1 SetFocalPoint 8.88908 0.595038 29.3342
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$cam1 SetPosition -12.3332 31.7479 41.2387
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$cam1 SetViewUp 0.060772 -0.319905 0.945498
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ren2 SetActiveCamera [ren1 GetActiveCamera]
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# render the image
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#
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renWin Render
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iren AddObserver UserEvent {wm deiconify .vtkInteract}
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iren Initialize
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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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