# Vertex

VTKExamples/Python/GeometricObjects/Display/Vertex

### Code

Vertex.py

    #!/usr/bin/env python

    import vtk

    points = vtk.vtkPoints()
    points.InsertNextPoint(0,0,0)

    vertex = vtk.vtkVertex()
    vertex.GetPointIds().SetId(0, 0)

    vertices = vtk.vtkCellArray()
    vertices.InsertNextCell(vertex)

    polydata = vtk.vtkPolyData()
    polydata.SetPoints(points)
    polydata.SetVerts(vertices)

    # Setup actor and mapper
    mapper = vtk.vtkPolyDataMapper()
    if vtk.VTK_MAJOR_VERSION <= 5:
        mapper.SetInputConnection(polydata.GetProducerPort())
    else:
        mapper.SetInputData(polydata)

    actor = vtk.vtkActor()
    actor.SetMapper(mapper)
    actor.GetProperty().SetPointSize(10)

    # Setup render window, renderer, and interactor
    renderer = vtk.vtkRenderer()
    renderWindow = vtk.vtkRenderWindow()
    renderWindow.AddRenderer(renderer)
    renderWindowInteractor = vtk.vtkRenderWindowInteractor()
    renderWindowInteractor.SetRenderWindow(renderWindow)
    renderer.AddActor(actor)

    renderWindow.Render()
    renderWindowInteractor.Start()