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51 lines
1.1 KiB
51 lines
1.1 KiB
package require vtk
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# do alpha-blending of two images, but also clip with stencil
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vtkBMPReader reader1
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reader1 SetFileName "$VTK_DATA_ROOT/Data/masonry.bmp"
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vtkPNMReader reader2
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reader2 SetFileName "$VTK_DATA_ROOT/Data/B.pgm"
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vtkLookupTable table
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table SetTableRange 0 127
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table SetValueRange 0.0 1.0
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table SetSaturationRange 0.0 0.0
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table SetHueRange 0.0 0.0
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table SetAlphaRange 0.9 0.0
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table Build
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vtkImageTranslateExtent translate
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translate SetInputConnection [reader2 GetOutputPort]
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translate SetTranslation 60 60 0
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vtkSphere sphere
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sphere SetCenter 121 131 0
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sphere SetRadius 70
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vtkImplicitFunctionToImageStencil functionToStencil
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functionToStencil SetInput sphere
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[functionToStencil GetOutput] SetUpdateExtent 0 255 0 255 0 0
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[functionToStencil GetOutput] Update
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vtkImageBlend blend
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blend SetInput 0 [reader1 GetOutput]
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blend SetInput 1 [translate GetOutput]
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blend SetOpacity 1 0.8
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blend SetStencil [functionToStencil GetOutput]
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vtkImageViewer viewer
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viewer SetInputConnection [blend GetOutputPort]
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viewer SetColorWindow 255.0
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viewer SetColorLevel 127.5
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viewer SetZSlice 0
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viewer Render
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