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75 lines
1.7 KiB
75 lines
1.7 KiB
2 years ago
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package require vtk
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# Test sub pixel positioning (A round about way of getting an iso surface.)
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# See cubed sphere for the surface before sub pixel poisitioning.
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vtkSphere sphere
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sphere SetCenter 1 1 1
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sphere SetRadius 0.9
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vtkSampleFunction sample
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sample SetImplicitFunction sphere
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sample SetModelBounds 0 2 0 2 0 2
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sample SetSampleDimensions 30 30 30
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sample ComputeNormalsOff
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vtkThreshold threshold1
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threshold1 SetInputConnection [sample GetOutputPort]
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threshold1 ThresholdByLower 0.001
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vtkGeometryFilter geometry
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geometry SetInputConnection [threshold1 GetOutputPort]
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vtkImageGradient grad
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grad SetDimensionality 3
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grad SetInputConnection [sample GetOutputPort]
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vtkImageMathematics mult
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mult SetOperationToMultiply
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mult SetInput1 [sample GetOutput]
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mult SetInput2 [sample GetOutput]
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vtkImageToStructuredPoints itosp
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itosp SetInputConnection [mult GetOutputPort]
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itosp SetVectorInput [grad GetOutput]
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vtkSubPixelPositionEdgels sub
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sub SetInputConnection [geometry GetOutputPort]
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sub SetGradMaps [itosp GetOutput]
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vtkDataSetMapper mapper
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mapper SetInputConnection [sub GetOutputPort]
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vtkActor actor
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actor SetMapper mapper
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# Create renderer stuff
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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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# Add the actors to the renderer, set the background and size
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#
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ren1 AddActor actor
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ren1 ResetCamera
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[ren1 GetActiveCamera] Azimuth 20
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[ren1 GetActiveCamera] Elevation 30
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ren1 SetBackground 0.1 0.2 0.4
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renWin SetSize 450 450
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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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set cam1 [ren1 GetActiveCamera]
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$cam1 Zoom 1.4
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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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