There are three examples using views displaying relations of vtk classes. The article learned from VTKUsersGuide
vtkTreeRingView
Python
#!/usr/bin/env python
from vtk import *
def main():
datapath = "/Users/weiyang/Downloads/VTKData" #vtk.util.misc.vtkGetDataRoot()
reader1 = vtkXMLTreeReader()
reader1.SetFileName(datapath + "/Data/Infovis/XML/vtkclasses.xml")
reader1.SetEdgePedigreeIdArrayName("tree edge")
reader1.GenerateVertexPedigreeIdsOff();
reader1.SetVertexPedigreeIdArrayName("id");
reader2 = vtkXMLTreeReader()
reader2.SetFileName(datapath + "/Data/Infovis/XML/vtklibrary.xml")
reader2.SetEdgePedigreeIdArrayName("graph edge")
reader2.GenerateVertexPedigreeIdsOff();
reader2.SetVertexPedigreeIdArrayName("id");
# Setup the view parameters for displaying the graph
view = vtkTreeRingView()
view.SetTreeFromInputConnection(reader2.GetOutputPort())
view.SetGraphFromInputConnection(reader1.GetOutputPort())
view.SetAreaColorArrayName("VertexDegree")
view.SetEdgeColorToSplineFraction()
view.SetAreaHoverArrayName("id")
view.SetColorEdges(True)
view.SetAreaLabelArrayName("id")
view.SetAreaLabelVisibility(True)
view.SetShrinkPercentage(0.02)
view.SetBundlingStrength(.8)
# Apply a theme to the views
theme = vtkViewTheme.CreateMellowTheme()
view.ApplyViewTheme(theme)
view.ResetCamera()
view.Render()
view.GetInteractor().Start()
# If we open this file to execute, __name__ is '__main__', or the name is file name of .py
if __name__ == "__main__":
main()
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vtkIcicleView
We use vtkIcicleView instead of vtkTreeRingView in the above example, then it gives us icicle graph.
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vtkTreeMapView
We use vtkTreeMapView instead of vtkTreeRingView in the first example, then it gives us the following graph.
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