# RegularPolygonSource

VTKExamples/Python/GeometricObjects/RegularPolygonSource

### Description

This example creates a pentagon.

### Code

RegularPolygonSource.py

    #!/usr/bin/env python
    # -*- coding: utf-8 -*-

    import vtk

    def main():
        colors = vtk.vtkNamedColors()

        # Create a pentagon
        polygonSource = vtk.vtkRegularPolygonSource()
        polygonSource.SetNumberOfSides(5)
        polygonSource.SetRadius(5)
        polygonSource.SetCenter(0, 0, 0)

        shrink = vtk.vtkShrinkPolyData()
        shrink.SetInputConnection(polygonSource.GetOutputPort())
        shrink.SetShrinkFactor(.9)

        mapper = vtk.vtkPolyDataMapper()
        mapper.SetInputConnection(shrink.GetOutputPort())

        back = vtk.vtkProperty()
        back.SetColor(colors.GetColor3d("Tomato"))

        actor = vtk.vtkActor()
        actor.SetMapper(mapper)
        actor.GetProperty().EdgeVisibilityOn()
        actor.GetProperty().SetLineWidth(5)
        actor.GetProperty().SetColor(colors.GetColor3d("Banana"))
        actor.SetBackfaceProperty(back)

        renderer = vtk.vtkRenderer()
        renderWindow = vtk.vtkRenderWindow()
        renderWindow.SetWindowName("Regular Polygon Source")
        renderWindow.AddRenderer(renderer)
        renderWindowInteractor = vtk.vtkRenderWindowInteractor()
        renderWindowInteractor.SetRenderWindow(renderWindow)

        renderer.AddActor(actor)
        renderer.SetBackground(colors.GetColor3d("Silver"))

        renderWindow.Render()
        renderWindowInteractor.Start()

    if __name__ == '__main__':
        main()