""" This file demonstrates the creation of a tree using the Python interface to VTK. """ from vtk import * #------------------------------------------------------------------------------ # Script Entry Point #------------------------------------------------------------------------------ if __name__ == "__main__": print "vtkTree Example 1: Building a tree from scratch." # Create an empty graph G = vtkMutableDirectedGraph() vertID = vtkIntArray() vertID.SetName("ID") G.GetVertexData().AddArray( vertID ) # Add a root vertex root = G.AddVertex() vertID.InsertNextValue(root) # Add some vertices for i in range(3): v = G.AddChild(root) vertID.InsertNextValue(v) for j in range(2): u = G.AddChild(v) vertID.InsertNextValue(u) T = vtkTree() T.ShallowCopy(G) #---------------------------------------------------------- # Draw the graph in a window view = vtkGraphLayoutView() view.AddRepresentationFromInput(G) view.SetVertexLabelArrayName("ID") view.SetVertexLabelVisibility(True) view.SetLayoutStrategyToTree() view.SetVertexLabelFontSize(20) theme = vtkViewTheme.CreateMellowTheme() theme.SetLineWidth(4) theme.SetPointSize(10) theme.SetCellOpacity(1) view.ApplyViewTheme(theme) theme.FastDelete() view.GetRenderWindow().SetSize(600, 600) view.ResetCamera() view.Render() view.GetInteractor().Start() print "vtkTree Example 1: Finished."