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114 lines
3.4 KiB
Python
114 lines
3.4 KiB
Python
#!/usr/bin/env python
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from vtk import *
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source = vtkRandomGraphSource()
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source.DirectedOff()
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source.SetNumberOfVertices(100)
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source.SetEdgeProbability(0) # Basically generates a tree
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source.SetUseEdgeProbability(True)
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source.SetStartWithTree(True)
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source.IncludeEdgeWeightsOn()
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# Connect to the Boost centrality filter.
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centrality = vtkBoostBrandesCentrality ()
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centrality.SetInputConnection(source.GetOutputPort())
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# Create force directed layout
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forceStrat = vtkSimple2DLayoutStrategy()
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forceStrat.SetInitialTemperature(5)
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# Create circular layout
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fastStrat = vtkFast2DLayoutStrategy()
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# Create a graph layout view
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view = vtkGraphLayoutView()
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view.AddRepresentationFromInputConnection(centrality.GetOutputPort())
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view.SetVertexLabelArrayName("vertex id")
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view.SetVertexLabelVisibility(True)
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view.SetVertexColorArrayName("vertex id")
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view.SetColorVertices(True)
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view.SetEdgeColorArrayName("edge weight")
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view.SetColorEdges(True)
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view.SetLayoutStrategy(forceStrat)
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# Create a second shrubery!
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view2 = vtkGraphLayoutView()
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view2.AddRepresentationFromInputConnection(centrality.GetOutputPort())
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view2.SetVertexLabelArrayName("vertex id")
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view2.SetVertexLabelVisibility(True)
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view2.SetVertexColorArrayName("vertex id")
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view2.SetColorVertices(True)
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view2.SetEdgeColorArrayName("centrality")
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view2.SetColorEdges(True)
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view2.SetLayoutStrategy(fastStrat)
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# Demonstrate value based selection on edges
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sel = vtkSelectionSource()
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sel.SetContentType(7) # Thresholds
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sel.SetFieldType(4) # Edge
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sel.SetArrayName("centrality")
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sel.AddThreshold(500,5000) # High centrality edges
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sel.Update()
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# Take selection and extract a graph
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extract_graph = vtkExtractSelectedGraph()
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extract_graph.AddInputConnection(centrality.GetOutputPort())
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extract_graph.SetSelectionConnection(sel.GetOutputPort())
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# Create a view for the extracted graph
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view3 = vtkGraphLayoutView()
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view3.AddRepresentationFromInputConnection(extract_graph.GetOutputPort())
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view3.SetVertexLabelArrayName("vertex id")
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view3.SetVertexLabelVisibility(True)
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view3.SetVertexColorArrayName("vertex id")
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view3.SetColorVertices(True)
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view3.SetEdgeColorArrayName("centrality")
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view3.SetColorEdges(True)
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view3.SetLayoutStrategyToSimple2D()
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# Make sure the views are using a pedigree id selection
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view.GetRepresentation(0).SetSelectionType(2)
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view2.GetRepresentation(0).SetSelectionType(2)
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view3.GetRepresentation(0).SetSelectionType(2)
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# Create a selection link and set both view to use it
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annotationLink = vtkAnnotationLink()
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view.GetRepresentation(0).SetAnnotationLink(annotationLink)
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view2.GetRepresentation(0).SetAnnotationLink(annotationLink)
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view3.GetRepresentation(0).SetAnnotationLink(annotationLink)
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annotationLink.SetCurrentSelection(sel.GetOutput())
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updater = vtkViewUpdater()
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updater.AddAnnotationLink(annotationLink)
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updater.AddView(view)
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updater.AddView(view2)
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updater.AddView(view3)
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# Set the theme on the view
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theme = vtkViewTheme.CreateMellowTheme()
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theme.SetLineWidth(5)
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theme.SetPointSize(10)
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theme.SetCellOpacity(.99)
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theme.SetSelectedCellColor(1,0,1)
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theme.SetSelectedPointColor(1,0,1)
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view.ApplyViewTheme(theme)
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view2.ApplyViewTheme(theme)
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view3.ApplyViewTheme(theme)
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theme.FastDelete()
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view.GetRenderWindow().SetSize(600, 600)
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view.ResetCamera()
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view.Render()
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view2.GetRenderWindow().SetSize(600, 600)
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view2.ResetCamera()
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view2.Render()
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view3.GetRenderWindow().SetSize(600, 600)
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view3.ResetCamera()
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view3.Render()
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view.GetInteractor().Start()
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