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65 lines
2.0 KiB
65 lines
2.0 KiB
2 years ago
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# This example demonstrates the use of the contour filter, and the use of
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# the vtkSampleFunction to generate a volume of data samples from an
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# implicit function.
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#
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# First we include the VTK Tcl packages which will make available
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# all of the vtk commands from Tcl. The vtkinteraction package defines
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# a simple Tcl/Tk interactor widget.
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#
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package require vtk
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package require vtkinteraction
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# VTK supports implicit functions of the form f(x,y,z)=constant. These
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# functions can represent things spheres, cones, etc. Here we use a
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# general form for a quadric to create an elliptical data field.
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vtkQuadric quadric
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quadric SetCoefficients .5 1 .2 0 .1 0 0 .2 0 0
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# vtkSampleFunction samples an implicit function over the x-y-z range
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# specified (here it defaults to -1,1 in the x,y,z directions).
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vtkSampleFunction sample
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sample SetSampleDimensions 30 30 30
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sample SetImplicitFunction quadric
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# Create five surfaces F(x,y,z) = constant between range specified. The
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# GenerateValues() method creates n isocontour values between the range
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# specified.
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vtkContourFilter contours
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contours SetInputConnection [sample GetOutputPort]
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contours GenerateValues 5 0.0 1.2
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vtkPolyDataMapper contMapper
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contMapper SetInputConnection [contours GetOutputPort]
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contMapper SetScalarRange 0.0 1.2
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vtkActor contActor
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contActor SetMapper contMapper
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# We'll put a simple outline around the data.
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vtkOutlineFilter outline
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outline SetInputConnection [sample GetOutputPort]
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vtkPolyDataMapper outlineMapper
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outlineMapper SetInputConnection [outline GetOutputPort]
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vtkActor outlineActor
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outlineActor SetMapper outlineMapper
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eval [outlineActor GetProperty] SetColor 0 0 0
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# The usual rendering 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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ren1 SetBackground 1 1 1
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ren1 AddActor contActor
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ren1 AddActor outlineActor
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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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