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67 lines
1.6 KiB
67 lines
1.6 KiB
#!/usr/bin/env python
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# This example demonstrates how to combine a "geometric" implicit
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# function with noise at different frequencies to produce the
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# appearance of a landscape.
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import vtk
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plane = vtk.vtkPlane()
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p1 = vtk.vtkPerlinNoise()
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p1.SetFrequency(1, 1, 0)
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p2 = vtk.vtkPerlinNoise()
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p2.SetFrequency(3, 5, 0)
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p2.SetPhase(0.5, 0.5, 0)
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p3 = vtk.vtkPerlinNoise()
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p3.SetFrequency(16, 16, 0)
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sum = vtk.vtkImplicitSum()
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sum.SetNormalizeByWeight(1)
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sum.AddFunction(plane)
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sum.AddFunction(p1, 0.2)
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sum.AddFunction(p2, 0.1)
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sum.AddFunction(p3, 0.02)
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sample = vtk.vtkSampleFunction()
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sample.SetImplicitFunction(sum)
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sample.SetSampleDimensions(65, 65, 20)
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sample.SetModelBounds(-1, 1, -1, 1, -0.5, 0.5)
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sample.ComputeNormalsOff()
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surface = vtk.vtkContourFilter()
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surface.SetInputConnection(sample.GetOutputPort())
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surface.SetValue(0, 0.0)
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smooth = vtk.vtkPolyDataNormals()
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smooth.SetInputConnection(surface.GetOutputPort())
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smooth.SetFeatureAngle(90)
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mapper = vtk.vtkPolyDataMapper()
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mapper.SetInputConnection(smooth.GetOutputPort())
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mapper.ScalarVisibilityOff()
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actor = vtk.vtkActor()
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actor.SetMapper(mapper)
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actor.GetProperty().SetColor(0.4, 0.2, 0.1)
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# Create the renderer etc.
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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(actor)
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ren.SetBackground(1, 1, 1)
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renWin.SetSize(500, 500)
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ren.ResetCamera()
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ren.GetActiveCamera().Elevation(-45)
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ren.GetActiveCamera().Azimuth(10)
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ren.GetActiveCamera().Dolly(1.35)
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ren.ResetCameraClippingRange()
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iren.Initialize()
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renWin.Render()
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iren.Start()
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