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89 lines
3.2 KiB
89 lines
3.2 KiB
# This example shows how to extract portions of an unstructured grid
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# using vtkExtractUnstructuredGrid. vtkConnectivityFilter is also used
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# to extract connected components.
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#
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# The data found here represents a blow molding process. Blow molding
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# requires a mold and parison (hot, viscous plastic) which is shaped
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# by the mold into the final form. The data file contains several steps
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# in time for the analysis.
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#
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package require vtk
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# Create a reader to read the unstructured grid data. We use a
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# vtkDataSetReader which means the type of the output is unknown until
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# the data file is read. SO we follow the reader with a vtkCastToConcrete
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# and cast the output to vtkUnstructuredGrid.
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vtkDataSetReader 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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vtkCastToConcrete castToUnstructuredGrid
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castToUnstructuredGrid SetInputConnection [reader GetOutputPort]
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vtkWarpVector warp
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warp SetInput [castToUnstructuredGrid GetUnstructuredGridOutput]
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# The connectivity filter extracts the first two regions. These are
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# know to represent the mold.
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vtkConnectivityFilter connect
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connect SetInputConnection [warp 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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# Another connectivity filter is used to extract the parison.
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vtkConnectivityFilter connect2
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connect2 SetInputConnection [warp GetOutputPort]
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connect2 SetExtractionModeToSpecifiedRegions
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connect2 AddSpecifiedRegion 2
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# We use vtkExtractUnstructuredGrid because we are interested in
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# looking at just a few cells. We use cell clipping via cell id to
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# extract the portion of the grid we are interested in.
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vtkExtractUnstructuredGrid extractGrid
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extractGrid SetInputConnection [connect2 GetOutputPort]
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extractGrid CellClippingOn
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extractGrid SetCellMinimum 0
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extractGrid SetCellMaximum 23
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vtkGeometryFilter parison
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parison SetInputConnection [extractGrid 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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# 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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#
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ren1 AddActor parisonActor
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ren1 AddActor moldActor
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ren1 SetBackground 1 1 1
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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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renWin SetSize 500 375
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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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