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59 lines
1.5 KiB
Python
Executable File
59 lines
1.5 KiB
Python
Executable File
#!/usr/bin/env python
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"""
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Just a demo script to test out the DIMACS reader/writer function
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"""
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from __future__ import print_function
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import time
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from vtk import *
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# generate a random graph
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source = vtkRandomGraphSource()
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source.SetNumberOfVertices(100)
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source.SetAllowSelfLoops(False)
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source.SetEdgeProbability(0.1)
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source.SetUseEdgeProbability(True)
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source.AllowParallelEdgesOff()
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source.Update()
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print("Original graph:")
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print("\tnum_verts =", source.GetOutput().GetNumberOfVertices())
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print("\tnum_edges =", source.GetOutput().GetNumberOfEdges())
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print("")
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# write the graph to a file
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writer = vtkDIMACSGraphWriter()
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writer.AddInputConnection(source.GetOutputPort())
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writer.SetFileName("graph.gr")
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writer.Update()
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print("wrote graph to 'graph.gr'")
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# let's pause a second to let the disk catch up <shrug/>
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time.sleep(1)
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# read the graph in from the file
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reader = vtkDIMACSGraphReader()
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reader.SetFileName("graph.gr")
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reader.Update()
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print("read graph from 'graph.gr'")
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print("Graph from disk:")
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print("\tnum_verts =", reader.GetOutput().GetNumberOfVertices())
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print("\tnum_edges =", reader.GetOutput().GetNumberOfEdges())
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view = vtkGraphLayoutView()
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view.AddRepresentationFromInputConnection(reader.GetOutputPort())
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view.SetLayoutStrategyToSimple2D()
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theme = vtkViewTheme.CreateMellowTheme()
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theme.SetLineWidth(1)
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theme.SetPointSize(5)
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view.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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view.GetInteractor().Start()
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