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102 lines
3.4 KiB
102 lines
3.4 KiB
# This example demonstrates how to extract "computational planes" from a
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# structured dataset. Structured data has a natural, logical coordinate
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# system based on i-j-k indices. Specifying imin,imax, jmin,jmax, kmin,kmax
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# pairs can indicate a point, line, plane, or volume of data.
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#
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# In this example, we extract three planes and warp them using scalar values
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# in the direction of the local normal at each point. This gives a sort of
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# "velocity profile" that indicates the nature of the flow.
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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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# Here we read data from a annular combustor. A combustor burns fuel and air
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# in a gas turbine (e.g., a jet engine) and the hot gas eventually makes its
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# way to the turbine section.
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#
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vtkPLOT3DReader pl3d
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pl3d SetXYZFileName "$VTK_DATA_ROOT/Data/combxyz.bin"
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pl3d SetQFileName "$VTK_DATA_ROOT/Data/combq.bin"
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pl3d SetScalarFunctionNumber 100
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pl3d SetVectorFunctionNumber 202
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pl3d Update
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# Planes are specified using a imin,imax, jmin,jmax, kmin,kmax coordinate
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# specification. Min and max i,j,k values are clamped to 0 and maximum value.
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#
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vtkStructuredGridGeometryFilter plane
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plane SetInputConnection [pl3d GetOutputPort]
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plane SetExtent 10 10 1 100 1 100
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vtkStructuredGridGeometryFilter plane2
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plane2 SetInputConnection [pl3d GetOutputPort]
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plane2 SetExtent 30 30 1 100 1 100
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vtkStructuredGridGeometryFilter plane3
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plane3 SetInputConnection [pl3d GetOutputPort]
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plane3 SetExtent 45 45 1 100 1 100
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# We use an append filter because that way we can do the warping, etc. just
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# using a single pipeline and actor.
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#
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vtkAppendPolyData appendF
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appendF AddInputConnection [plane GetOutputPort]
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appendF AddInputConnection [plane2 GetOutputPort]
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appendF AddInputConnection [plane3 GetOutputPort]
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vtkWarpScalar warp
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warp SetInputConnection [appendF GetOutputPort]
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warp UseNormalOn
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warp SetNormal 1.0 0.0 0.0
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warp SetScaleFactor 2.5
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vtkPolyDataNormals normals
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normals SetInputConnection [warp GetOutputPort]
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normals SetFeatureAngle 60
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vtkPolyDataMapper planeMapper
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planeMapper SetInputConnection [normals GetOutputPort]
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eval planeMapper SetScalarRange [[pl3d GetOutput] GetScalarRange]
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vtkActor planeActor
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planeActor SetMapper planeMapper
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# The outline provides context for the data and the planes.
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vtkStructuredGridOutlineFilter outline
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outline SetInputConnection [pl3d 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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[outlineActor GetProperty] SetColor 0 0 0
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# Create the usual graphics 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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ren1 AddActor outlineActor
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ren1 AddActor planeActor
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ren1 SetBackground 1 1 1
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renWin SetSize 500 500
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# Create an initial view.
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set cam1 [ren1 GetActiveCamera]
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$cam1 SetClippingRange 3.95297 50
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$cam1 SetFocalPoint 8.88908 0.595038 29.3342
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$cam1 SetPosition -12.3332 31.7479 41.2387
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$cam1 SetViewUp 0.060772 -0.319905 0.945498
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iren Initialize
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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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renWin Render
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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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