# BoundaryEdges

VTKExamples/Python/Meshes/BoundaryEdges

This filter will extract the boundary edges of a mesh. The original mesh is shown with the feature edges shown in red.

Other Languages

See (Cxx), (Java), (CSharp)

### Code

BoundaryEdges.py

    #!/usr/bin/env python

    import vtk

    def main():
        colors = vtk.vtkNamedColors()
        diskSource = vtk.vtkDiskSource()
        diskSource.Update()

        featureEdges = vtk.vtkFeatureEdges()
        featureEdges.SetInputConnection(diskSource.GetOutputPort())
        featureEdges.BoundaryEdgesOn()
        featureEdges.FeatureEdgesOff()
        featureEdges.ManifoldEdgesOff()
        featureEdges.NonManifoldEdgesOff()
        featureEdges.Update()

        # Visualize
        edgeMapper = vtk.vtkPolyDataMapper()
        edgeMapper.SetInputConnection(featureEdges.GetOutputPort())
        edgeActor = vtk.vtkActor()
        edgeActor.SetMapper(edgeMapper)

        diskMapper = vtk.vtkPolyDataMapper()
        diskMapper.SetInputConnection(diskSource.GetOutputPort())
        diskActor = vtk.vtkActor()
        diskActor.SetMapper(diskMapper)

        # Create a renderer, render window, and interactor
        renderer = vtk.vtkRenderer()
        renderWindow = vtk.vtkRenderWindow()
        renderWindow.AddRenderer(renderer)
        renderWindowInteractor = vtk.vtkRenderWindowInteractor()
        renderWindowInteractor.SetRenderWindow(renderWindow)

        renderer.AddActor(edgeActor)
        renderer.AddActor(diskActor)
        renderer.SetBackground(colors.GetColor3d("green")) # Background color green
        renderWindow.Render()
        renderWindowInteractor.Start()

    if __name__ == '__main__':
        main()