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79 lines
2.6 KiB
79 lines
2.6 KiB
#!/usr/bin/env python
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# This example shows how to use cutting (vtkCutter) and how it
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# compares with extracting a plane from a computational grid.
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import vtk
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from vtk.util.misc import vtkGetDataRoot
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VTK_DATA_ROOT = vtkGetDataRoot()
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# Read some data.
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pl3d = vtk.vtkPLOT3DReader()
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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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# The cutter uses an implicit function to perform the cutting.
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# Here we define a plane, specifying its center and normal.
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# Then we assign the plane to the cutter.
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plane = vtk.vtkPlane()
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plane.SetOrigin(pl3d.GetOutput().GetCenter())
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plane.SetNormal(-0.287, 0, 0.9579)
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planeCut = vtk.vtkCutter()
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planeCut.SetInputConnection(pl3d.GetOutputPort())
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planeCut.SetCutFunction(plane)
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cutMapper = vtk.vtkPolyDataMapper()
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cutMapper.SetInputConnection(planeCut.GetOutputPort())
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cutMapper.SetScalarRange(pl3d.GetOutput().GetPointData().GetScalars().GetRange())
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cutActor = vtk.vtkActor()
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cutActor.SetMapper(cutMapper)
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# Here we extract a computational plane from the structured grid.
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# We render it as wireframe.
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compPlane = vtk.vtkStructuredGridGeometryFilter()
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compPlane.SetInputConnection(pl3d.GetOutputPort())
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compPlane.SetExtent(0, 100, 0, 100, 9, 9)
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planeMapper = vtk.vtkPolyDataMapper()
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planeMapper.SetInputConnection(compPlane.GetOutputPort())
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planeMapper.ScalarVisibilityOff()
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planeActor = vtk.vtkActor()
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planeActor.SetMapper(planeMapper)
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planeActor.GetProperty().SetRepresentationToWireframe()
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planeActor.GetProperty().SetColor(0, 0, 0)
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# The outline of the data puts the data in context.
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outline = vtk.vtkStructuredGridOutlineFilter()
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outline.SetInputConnection(pl3d.GetOutputPort())
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outlineMapper = vtk.vtkPolyDataMapper()
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outlineMapper.SetInputConnection(outline.GetOutputPort())
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outlineActor = vtk.vtkActor()
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outlineActor.SetMapper(outlineMapper)
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outlineProp = outlineActor.GetProperty()
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outlineProp.SetColor(0, 0, 0)
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# Create the RenderWindow, Renderer and both Actors
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ren = vtk.vtkRenderer()
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renWin = vtk.vtkRenderWindow()
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renWin.AddRenderer(ren)
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iren = vtk.vtkRenderWindowInteractor()
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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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ren.AddActor(outlineActor)
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ren.AddActor(planeActor)
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ren.AddActor(cutActor)
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ren.SetBackground(1, 1, 1)
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renWin.SetSize(400, 300)
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cam1 = ren.GetActiveCamera()
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cam1.SetClippingRange(11.1034, 59.5328)
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cam1.SetFocalPoint(9.71821, 0.458166, 29.3999)
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cam1.SetPosition(-2.95748, -26.7271, 44.5309)
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cam1.SetViewUp(0.0184785, 0.479657, 0.877262)
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iren.Initialize()
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renWin.Render()
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iren.Start()
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