ConstructGraph

VTKExamples/Python/Graphs/ConstructGraph

This example shows how to construct a simple graph.

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Code¶

ConstructGraph.py

#!/usr/bin/env python

import vtk

def main():
    g = vtk.vtkMutableUndirectedGraph()

    v1 = g.AddVertex()
    v2 = g.AddVertex()

    g.AddEdge ( v1, v2 )
    print ('Number of vertices:', g.GetNumberOfVertices())
    print ("Number of edges:", g.GetNumberOfEdges())

    g.AddEdge ( v1, v2 )
    print ('Number of vertices:', g.GetNumberOfVertices())
    print ('Number of edges:', g.GetNumberOfEdges())
    graphLayoutView = vtk.vtkGraphLayoutView()
    graphLayoutView.AddRepresentationFromInput(g)
    graphLayoutView.ResetCamera()
    graphLayoutView.Render()
    graphLayoutView.GetInteractor().Start()

if __name__ == '__main__':
    main()