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99 lines
3.3 KiB
99 lines
3.3 KiB
2 years ago
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# This example demonstrates the conversion of point data to cell data.
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# The conversion is necessary because we want to threshold data based
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# on cell scalar values.
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package require vtk
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package require vtkinteraction
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# Read some data with point data attributes. The data is from a plastic
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# blow molding process (e.g., to make plastic bottles) and consists of two
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# logical components: a mold and a parison. The parison is the
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# hot plastic that is being molded, and the mold is clamped around the
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# parison to form its shape.
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vtkUnstructuredGridReader reader
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reader SetFileName "$VTK_DATA_ROOT/Data/blow.vtk"
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reader SetScalarsName "thickness9"
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reader SetVectorsName "displacement9"
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# Convert the point data to cell data. The point data is passed through the
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# filter so it can be warped. The vtkThresholdFilter then thresholds based
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# on cell scalar values and extracts a portion of the parison whose cell
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# scalar values lie between 0.25 and 0.75.
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vtkPointDataToCellData p2c
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p2c SetInputConnection [reader GetOutputPort]
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p2c PassPointDataOn
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vtkWarpVector warp
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warp SetInputConnection [p2c GetOutputPort]
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vtkThreshold thresh
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thresh SetInputConnection [warp GetOutputPort]
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thresh ThresholdBetween 0.25 0.75
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thresh SetInputArrayToProcess 1 0 0 0 "thickness9"
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# thresh SetAttributeModeToUseCellData
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# This is used to extract the mold from the parison.
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vtkConnectivityFilter connect
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connect SetInputConnection [thresh GetOutputPort]
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connect SetExtractionModeToSpecifiedRegions
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connect AddSpecifiedRegion 0
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connect AddSpecifiedRegion 1
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vtkDataSetMapper moldMapper
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moldMapper SetInputConnection [reader GetOutputPort]
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moldMapper ScalarVisibilityOff
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vtkActor moldActor
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moldActor SetMapper moldMapper
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[moldActor GetProperty] SetColor .2 .2 .2
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[moldActor GetProperty] SetRepresentationToWireframe
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# The threshold filter has been used to extract the parison.
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vtkConnectivityFilter connect2
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connect2 SetInputConnection [thresh GetOutputPort]
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vtkGeometryFilter parison
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parison SetInputConnection [connect2 GetOutputPort]
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vtkPolyDataNormals normals2
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normals2 SetInputConnection [parison GetOutputPort]
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normals2 SetFeatureAngle 60
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vtkLookupTable lut
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lut SetHueRange 0.0 0.66667
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vtkPolyDataMapper parisonMapper
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parisonMapper SetInputConnection [normals2 GetOutputPort]
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parisonMapper SetLookupTable lut
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parisonMapper SetScalarRange 0.12 1.0
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vtkActor parisonActor
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parisonActor SetMapper parisonMapper
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# We generate some contour lines on the parison.
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vtkContourFilter cf
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cf SetInputConnection [connect2 GetOutputPort]
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cf SetValue 0 .5
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vtkPolyDataMapper contourMapper
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contourMapper SetInputConnection [cf GetOutputPort]
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vtkActor contours
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contours SetMapper contourMapper
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# Create graphics stuff
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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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# Add the actors to the renderer, set the background and size
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ren1 AddActor moldActor
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ren1 AddActor parisonActor
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ren1 AddActor contours
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ren1 ResetCamera
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[ren1 GetActiveCamera] Azimuth 60
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[ren1 GetActiveCamera] Roll -90
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[ren1 GetActiveCamera] Dolly 2
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ren1 ResetCameraClippingRange
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ren1 SetBackground 1 1 1
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renWin SetSize 750 400
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iren Initialize
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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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