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60 lines
1.5 KiB
60 lines
1.5 KiB
2 years ago
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package require vtk
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package require vtkinteraction
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# cell scalars to point scalars
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# get the interactor ui
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# Create the RenderWindow, Renderer and RenderWindowInteractor
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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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# create a 2*2 cell/3*3 pt structuredgrid
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vtkPoints points
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points InsertNextPoint -1 1 0
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points InsertNextPoint 0 1 0
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points InsertNextPoint 1 1 0
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points InsertNextPoint -1 0 0
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points InsertNextPoint 0 0 0
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points InsertNextPoint 1 0 0
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points InsertNextPoint -1 -1 0
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points InsertNextPoint 0 -1 0
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points InsertNextPoint 1 -1 0
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vtkFloatArray faceColors
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faceColors InsertNextValue 0
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faceColors InsertNextValue 1
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faceColors InsertNextValue 1
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faceColors InsertNextValue 2
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vtkStructuredGrid sgrid
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sgrid SetDimensions 3 3 1
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sgrid SetPoints points
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[sgrid GetCellData] SetScalars faceColors
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vtkCellDataToPointData Cell2Point
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Cell2Point SetInput sgrid
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Cell2Point PassCellDataOn
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vtkDataSetMapper mapper
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mapper SetInput [Cell2Point GetStructuredGridOutput]
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mapper SetScalarModeToUsePointData
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mapper SetScalarRange 0 2
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vtkActor actor
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actor SetMapper mapper
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# Add the actors to the renderer, set the background and size
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ren1 AddActor actor
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ren1 SetBackground 0.1 0.2 0.4
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renWin SetSize 256 256
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# render the image
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iren AddObserver UserEvent {wm deiconify .vtkInteract}
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iren Initialize
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wm withdraw .
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