# RegularPolygonSource

VTKExamples/CSharp/GeometricObjects/RegularPolygonSource

### Description

This example creates a pentagon.
A tutorial on how to setup a Windows Forms Application utilizing ActiViz.NET can be found here: Setup a Windows Forms Application to use ActiViz.NET

Other Languages

See (Cxx), (Python), (Java)

### Code

RegularPolygonSource.cs

    using System;
    using System.Collections.Generic;
    using System.ComponentModel;
    using System.Windows.Forms;
    using System.Diagnostics;

    using Kitware.VTK;

    namespace ActiViz.Examples {
       public partial class Form1 : Form {
          public Form1() {
             InitializeComponent();
          }

          private void renderWindowControl1_Load(object sender, EventArgs e) {
             try {
                RegularPolygon();
             }
             catch(Exception ex) {
                MessageBox.Show(ex.Message, "Exception", MessageBoxButtons.OK);
             }
          }

          private void RegularPolygon() {
             // Create a pentagon
             vtkRegularPolygonSource polygonSource = vtkRegularPolygonSource.New();

             //polygonSource.GeneratePolygonOff();
             polygonSource.SetNumberOfSides(5);
             polygonSource.SetRadius(5);
             polygonSource.SetCenter(0, 0, 0);
             //polygonSource.Update(); // not necessary

             vtkPolyDataMapper mapper = vtkPolyDataMapper.New();
             mapper.SetInputConnection(polygonSource.GetOutputPort());
             vtkActor actor = vtkActor.New();
             actor.GetProperty().SetLineWidth(4);
             actor.SetMapper(mapper);
             vtkRenderWindow renderWindow = renderWindowControl1.RenderWindow;
             vtkRenderer renderer = renderWindow.GetRenderers().GetFirstRenderer();
             renderer.SetBackground(0.2, 0.3, 0.4);
             renderer.AddActor(actor);
          }
       }
    }