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102 lines
3.2 KiB
Python
Executable File
102 lines
3.2 KiB
Python
Executable File
#!/usr/bin/env python
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import vtk
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from vtk.test import Testing
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from vtk.util.misc import vtkGetDataRoot
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VTK_DATA_ROOT = vtkGetDataRoot()
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# Create the RenderWindow, Renderer and both Actors
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#
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ren1 = vtk.vtkRenderer()
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renWin = vtk.vtkRenderWindow()
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renWin.AddRenderer(ren1)
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iren = vtk.vtkRenderWindowInteractor()
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iren.SetRenderWindow(renWin)
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Scale = 5
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lut = vtk.vtkLookupTable()
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lut.SetHueRange(0.6, 0)
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lut.SetSaturationRange(1.0, 0)
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lut.SetValueRange(0.5, 1.0)
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demModel = vtk.vtkDEMReader()
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demModel.SetFileName(VTK_DATA_ROOT + "/Data/SainteHelens.dem")
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demModel.Update()
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lo = Scale * demModel.GetElevationBounds()[0]
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hi = Scale * demModel.GetElevationBounds()[1]
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demActor = vtk.vtkLODActor()
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# create a pipeline for each lod mapper
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lods = ["4", "8", "16"]
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for lod in lods:
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exec("shrink" + lod + " = vtk.vtkImageShrink3D()")
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eval("shrink" + lod).SetShrinkFactors(int(lod), int(lod), 1)
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eval("shrink" + lod).SetInputConnection(demModel.GetOutputPort())
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eval("shrink" + lod).AveragingOn()
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exec("geom" + lod + " = vtk.vtkImageDataGeometryFilter()")
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eval("geom" + lod).SetInputConnection(eval("shrink" + lod).GetOutputPort())
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eval("geom" + lod).ReleaseDataFlagOn()
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exec("warp" + lod + " = vtk.vtkWarpScalar()")
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eval("warp" + lod).SetInputConnection(eval("geom" + lod).GetOutputPort())
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eval("warp" + lod).SetNormal(0, 0, 1)
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eval("warp" + lod).UseNormalOn()
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eval("warp" + lod).SetScaleFactor(Scale)
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eval("warp" + lod).ReleaseDataFlagOn()
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exec("elevation" + lod + " = vtk.vtkElevationFilter()")
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eval("elevation" + lod).SetInputConnection(
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eval("warp" + lod).GetOutputPort())
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eval("elevation" + lod).SetLowPoint(0, 0, lo)
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eval("elevation" + lod).SetHighPoint(0, 0, hi)
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eval("elevation" + lod).SetScalarRange(lo, hi)
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eval("elevation" + lod).ReleaseDataFlagOn()
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exec("toPoly" + lod + " = vtk.vtkCastToConcrete()")
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eval("toPoly" + lod).SetInputConnection(
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eval("elevation" + lod).GetOutputPort())
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exec("normals" + lod + " = vtk.vtkPolyDataNormals()")
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eval("normals" + lod).SetInputConnection(
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eval("toPoly" + lod).GetOutputPort())
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eval("normals" + lod).SetFeatureAngle(60)
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eval("normals" + lod).ConsistencyOff()
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eval("normals" + lod).SplittingOff()
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eval("normals" + lod).ReleaseDataFlagOn()
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exec("demMapper" + lod + " = vtk.vtkPolyDataMapper()")
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eval("demMapper" + lod).SetInputConnection(
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eval("normals" + lod).GetOutputPort())
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eval("demMapper" + lod).SetScalarRange(lo, hi)
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eval("demMapper" + lod).SetLookupTable(lut)
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eval("demMapper" + lod).ImmediateModeRenderingOn()
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eval("demMapper" + lod).Update()
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demActor.AddLODMapper(eval("demMapper" + lod))
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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(demActor)
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ren1.SetBackground(.4, .4, .4)
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iren.SetDesiredUpdateRate(1)
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def TkCheckAbort (object_binding, event_name):
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foo = renWin.GetEventPending()
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if (foo != 0):
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renWin.SetAbortRender(1)
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renWin.AddObserver("AbortCheckEvent", TkCheckAbort)
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ren1.GetActiveCamera().SetViewUp(0, 0, 1)
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ren1.GetActiveCamera().SetPosition(-99900, -21354, 131801)
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ren1.GetActiveCamera().SetFocalPoint(41461, 41461, 2815)
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ren1.ResetCamera()
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ren1.GetActiveCamera().Dolly(1.2)
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ren1.ResetCameraClippingRange()
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renWin.Render()
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#iren.Start()
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