/usr/share/vtk/Infovis/Python/selection.py is in vtk-examples 5.8.0-17.5.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 | from vtk import *
source = vtkRandomGraphSource()
source.DirectedOff()
source.SetNumberOfVertices(100)
source.SetEdgeProbability(0) # Basically generates a tree
source.SetUseEdgeProbability(True)
source.SetStartWithTree(True)
source.IncludeEdgeWeightsOn()
# Connect to the Boost centrality filter.
centrality = vtkBoostBrandesCentrality ()
centrality.SetInputConnection(source.GetOutputPort())
# Create force directed layout
forceStrat = vtkSimple2DLayoutStrategy()
forceStrat.SetInitialTemperature(5)
# Create circular layout
fastStrat = vtkFast2DLayoutStrategy()
# Create a graph layout view
view = vtkGraphLayoutView()
view.AddRepresentationFromInputConnection(centrality.GetOutputPort())
view.SetVertexLabelArrayName("vertex id")
view.SetVertexLabelVisibility(True)
view.SetVertexColorArrayName("vertex id")
view.SetColorVertices(True)
view.SetEdgeColorArrayName("edge weight")
view.SetColorEdges(True)
view.SetLayoutStrategy(forceStrat)
# Create a second shrubery!
view2 = vtkGraphLayoutView()
view2.AddRepresentationFromInputConnection(centrality.GetOutputPort())
view2.SetVertexLabelArrayName("vertex id")
view2.SetVertexLabelVisibility(True)
view2.SetVertexColorArrayName("vertex id")
view2.SetColorVertices(True)
view2.SetEdgeColorArrayName("centrality")
view2.SetColorEdges(True)
view2.SetLayoutStrategy(fastStrat)
# Demonstrate value based selection on edges
sel = vtkSelectionSource()
sel.SetContentType(7) # Thresholds
sel.SetFieldType(4) # Edge
sel.SetArrayName("centrality")
sel.AddThreshold(500,5000) # High centrality edges
sel.Update()
# Take selection and extract a graph
extract_graph = vtkExtractSelectedGraph()
extract_graph.AddInputConnection(centrality.GetOutputPort())
extract_graph.SetSelectionConnection(sel.GetOutputPort())
# Create a view for the extracted graph
view3 = vtkGraphLayoutView()
view3.AddRepresentationFromInputConnection(extract_graph.GetOutputPort())
view3.SetVertexLabelArrayName("vertex id")
view3.SetVertexLabelVisibility(True)
view3.SetVertexColorArrayName("vertex id")
view3.SetColorVertices(True)
view3.SetEdgeColorArrayName("centrality")
view3.SetColorEdges(True)
view3.SetLayoutStrategyToSimple2D()
# Make sure the views are using a pedigree id selection
view.GetRepresentation(0).SetSelectionType(2)
view2.GetRepresentation(0).SetSelectionType(2)
view3.GetRepresentation(0).SetSelectionType(2)
# Create a selection link and set both view to use it
annotationLink = vtkAnnotationLink()
view.GetRepresentation(0).SetAnnotationLink(annotationLink)
view2.GetRepresentation(0).SetAnnotationLink(annotationLink)
view3.GetRepresentation(0).SetAnnotationLink(annotationLink)
annotationLink.SetCurrentSelection(sel.GetOutput())
updater = vtkViewUpdater()
updater.AddAnnotationLink(annotationLink)
updater.AddView(view)
updater.AddView(view2)
updater.AddView(view3)
# Set the theme on the view
theme = vtkViewTheme.CreateMellowTheme()
theme.SetLineWidth(5)
theme.SetPointSize(10)
theme.SetCellOpacity(.99)
theme.SetSelectedCellColor(1,0,1)
theme.SetSelectedPointColor(1,0,1)
view.ApplyViewTheme(theme)
view2.ApplyViewTheme(theme)
view3.ApplyViewTheme(theme)
theme.FastDelete()
view.GetRenderWindow().SetSize(600, 600)
view.ResetCamera()
view.Render()
view2.GetRenderWindow().SetSize(600, 600)
view2.ResetCamera()
view2.Render()
view3.GetRenderWindow().SetSize(600, 600)
view3.ResetCamera()
view3.Render()
view.GetInteractor().Start()
|