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103 lines
3.1 KiB
Python
103 lines
3.1 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(0.1)
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source.SetUseEdgeProbability(True)
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source.AllowParallelEdgesOn()
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source.AllowSelfLoopsOn()
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source.SetStartWithTree(True)
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# Connect to the centrality filter.
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centrality = vtkBoostBrandesCentrality ()
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centrality.SetInputConnection(source.GetOutputPort())
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# Find the minimal spanning tree
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mstTreeSelection = vtkBoostKruskalMinimumSpanningTree()
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mstTreeSelection.SetInputConnection(centrality.GetOutputPort())
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mstTreeSelection.SetEdgeWeightArrayName("centrality")
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mstTreeSelection.NegateEdgeWeightsOn()
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mstTreeSelection.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(mstTreeSelection.GetOutputPort())
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# Extract a tree from the graph
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extract_tree = vtkBoostBreadthFirstSearchTree()
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extract_tree.AddInputConnection(extract_graph.GetOutputPort())
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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("centrality")
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view.SetVertexLabelVisibility(True)
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view.SetVertexColorArrayName("centrality")
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view.SetColorVertices(True)
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view.SetEdgeColorArrayName("centrality")
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view.SetColorEdges(True)
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view.SetLayoutStrategyToSimple2D()
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# Setup a couple layout strategies so we can switch
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# them out for comparison
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treeStrat = vtkTreeLayoutStrategy();
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treeStrat.RadialOn()
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treeStrat.SetAngle(120)
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treeStrat.SetLogSpacingValue(1)
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forceStrat = vtkSimple2DLayoutStrategy()
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forceStrat.SetEdgeWeightField("centrality")
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# Create an HGV
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view2 = vtkHierarchicalGraphView()
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view2.SetHierarchyFromInputConnection(extract_tree.GetOutputPort())
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view2.SetGraphFromInputConnection(centrality.GetOutputPort())
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view2.SetVertexColorArrayName("centrality")
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view2.SetColorVertices(True)
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view2.SetVertexLabelArrayName("centrality")
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view2.SetVertexLabelVisibility(True)
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view2.SetEdgeColorArrayName("centrality")
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view2.SetColorEdges(True)
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view2.SetBundlingStrength(.75)
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view2.SetLayoutStrategy(forceStrat)
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#view2.SetLayoutStrategy(treeStrat)
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# Make sure all 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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# 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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annotationLink.SetCurrentSelection(mstTreeSelection.GetOutput())
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# Make updater to update views on selection change
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updater = vtkViewUpdater()
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updater.AddView(view)
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updater.AddView(view2)
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# Set the theme on the view
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theme = vtkViewTheme.CreateMellowTheme()
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theme.SetLineWidth(4)
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theme.SetPointSize(8)
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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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theme.SetLineWidth(1)
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view2.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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view.GetInteractor().Start()
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