1#!/usr/bin/env python
2import vtk
3from vtk.util.misc import vtkGetDataRoot
4VTK_DATA_ROOT = vtkGetDataRoot()
5
6def GetRGBColor(colorName):
7    '''
8        Return the red, green and blue components for a
9        color as doubles.
10    '''
11    rgb = [0.0, 0.0, 0.0]  # black
12    vtk.vtkNamedColors().GetColorRGB(colorName, rgb)
13    return rgb
14
15VTK_VARY_RADIUS_BY_VECTOR = 2
16
17# create pipeline
18#
19# Make sure all algorithms use the composite data pipeline
20cdp = vtk.vtkCompositeDataPipeline()
21
22reader = vtk.vtkGenericEnSightReader()
23reader.SetDefaultExecutivePrototype(cdp)
24reader.SetCaseFileName(VTK_DATA_ROOT + "/Data/EnSight/RectGrid_ascii.case")
25reader.Update()
26
27toRectilinearGrid = vtk.vtkCastToConcrete()
28toRectilinearGrid.SetInputData(reader.GetOutput().GetBlock(0))
29toRectilinearGrid.Update()
30
31plane = vtk.vtkRectilinearGridGeometryFilter()
32plane.SetInputData(toRectilinearGrid.GetRectilinearGridOutput())
33plane.SetExtent(0, 100, 0, 100, 15, 15)
34
35tri = vtk.vtkTriangleFilter()
36tri.SetInputConnection(plane.GetOutputPort())
37
38warper = vtk.vtkWarpVector()
39warper.SetInputConnection(tri.GetOutputPort())
40warper.SetScaleFactor(0.05)
41
42planeMapper = vtk.vtkDataSetMapper()
43planeMapper.SetInputConnection(warper.GetOutputPort())
44planeMapper.SetScalarRange(0.197813, 0.710419)
45
46planeActor = vtk.vtkActor()
47planeActor.SetMapper(planeMapper)
48
49cutPlane = vtk.vtkPlane()
50cutPlane.SetOrigin(reader.GetOutput().GetBlock(0).GetCenter())
51cutPlane.SetNormal(1, 0, 0)
52
53planeCut = vtk.vtkCutter()
54planeCut.SetInputData(toRectilinearGrid.GetRectilinearGridOutput())
55planeCut.SetCutFunction(cutPlane)
56
57cutMapper = vtk.vtkDataSetMapper()
58cutMapper.SetInputConnection(planeCut.GetOutputPort())
59cutMapper.SetScalarRange(
60  reader.GetOutput().GetBlock(0).GetPointData().GetScalars().GetRange())
61
62cutActor = vtk.vtkActor()
63cutActor.SetMapper(cutMapper)
64
65iso = vtk.vtkContourFilter()
66iso.SetInputData(toRectilinearGrid.GetRectilinearGridOutput())
67iso.SetValue(0, 0.7)
68
69normals = vtk.vtkPolyDataNormals()
70normals.SetInputConnection(iso.GetOutputPort())
71normals.SetFeatureAngle(45)
72
73isoMapper = vtk.vtkPolyDataMapper()
74isoMapper.SetInputConnection(normals.GetOutputPort())
75isoMapper.ScalarVisibilityOff()
76
77isoActor = vtk.vtkActor()
78isoActor.SetMapper(isoMapper)
79isoActor.GetProperty().SetColor(GetRGBColor('bisque'))
80isoActor.GetProperty().SetRepresentationToWireframe()
81
82streamer = vtk.vtkStreamTracer()
83streamer.SetInputData(reader.GetOutput().GetBlock(0))
84streamer.SetStartPosition(-1.2, -0.1, 1.3)
85streamer.SetMaximumPropagation(500)
86streamer.SetInitialIntegrationStep(0.05)
87streamer.SetIntegrationDirectionToBoth()
88
89streamTube = vtk.vtkTubeFilter()
90streamTube.SetInputConnection(streamer.GetOutputPort())
91streamTube.SetRadius(0.025)
92streamTube.SetNumberOfSides(6)
93streamTube.SetVaryRadius(VTK_VARY_RADIUS_BY_VECTOR)
94
95mapStreamTube = vtk.vtkPolyDataMapper()
96mapStreamTube.SetInputConnection(streamTube.GetOutputPort())
97mapStreamTube.SetScalarRange(
98  reader.GetOutput().GetBlock(0).GetPointData().GetScalars().GetRange())
99
100streamTubeActor = vtk.vtkActor()
101streamTubeActor.SetMapper(mapStreamTube)
102streamTubeActor.GetProperty().BackfaceCullingOn()
103
104outline = vtk.vtkOutlineFilter()
105outline.SetInputData(toRectilinearGrid.GetRectilinearGridOutput())
106
107outlineMapper = vtk.vtkPolyDataMapper()
108outlineMapper.SetInputConnection(outline.GetOutputPort())
109
110outlineActor = vtk.vtkActor()
111outlineActor.SetMapper(outlineMapper)
112outlineActor.GetProperty().SetColor(GetRGBColor('black'))
113
114# Graphics stuff
115# Create the RenderWindow, Renderer and both Actors
116#
117ren1 = vtk.vtkRenderer()
118renWin = vtk.vtkRenderWindow()
119renWin.SetMultiSamples(0)
120renWin.AddRenderer(ren1)
121iren = vtk.vtkRenderWindowInteractor()
122iren.SetRenderWindow(renWin)
123
124# Add the actors to the renderer, set the background and size
125#
126ren1.AddActor(outlineActor)
127ren1.AddActor(planeActor)
128ren1.AddActor(cutActor)
129ren1.AddActor(isoActor)
130ren1.AddActor(streamTubeActor)
131ren1.SetBackground(1, 1, 1)
132
133renWin.SetSize(400, 400)
134
135cam1 = ren1.GetActiveCamera()
136cam1.SetClippingRange(3.76213, 10.712)
137cam1.SetFocalPoint(-0.0842503, -0.136905, 0.610234)
138cam1.SetPosition(2.53813, 2.2678, -5.22172)
139cam1.SetViewUp(-0.241047, 0.930635, 0.275343)
140
141reader.SetDefaultExecutivePrototype(None)
142
143iren.Initialize()
144# render the image
145#
146#iren.Start()
147