# PolyLine

VTKExamples/CSharp/GeometricObjects/PolyLine

### Description

This example demonstrates how to make a line through several ordered points.
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

### Code

PolyLine.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 {
                PolyLine();
             }
             catch(Exception ex) {
                MessageBox.Show(ex.Message, "Exception", MessageBoxButtons.OK);
             }
          }

          private void PolyLine() {
             // Create five points
             double[,] p = new double[,] {
                { 0.0, 0.0, 0.0 },
                { 1.0, 0.0, 0.0 },
                { 0.0, 1.0, 0.0 },
                { 0.0, 1.0, 2.0 },
                { 0.0, 3.0, 3.0 }
             };

             // Create the points
             vtkPoints points = vtkPoints.New();
             for(int i = 0; i < 5; i++)
                points.InsertNextPoint(p[i, 0], p[i, 1], p[i, 2]);

             vtkPolyLine polyLine = vtkPolyLine.New();
             polyLine.GetPointIds().SetNumberOfIds(5);
             for(int i = 0; i < 5; i++)
                polyLine.GetPointIds().SetId(i, i);

             // Create a cell array to store the lines in and add the lines to it
             vtkCellArray cells = vtkCellArray.New();
             cells.InsertNextCell(polyLine);

             // Create a polydata to store everything in
             vtkPolyData polyData = vtkPolyData.New();

             // Add the points to the dataset
             polyData.SetPoints(points);

             // Add the lines to the dataset
             polyData.SetLines(cells);
             //Create an actor and mapper
             vtkPolyDataMapper mapper = vtkPolyDataMapper.New();
             mapper.SetInput(polyData);
             vtkActor actor = vtkActor.New();
             actor.SetMapper(mapper);
             vtkRenderWindow renderWindow = renderWindowControl1.RenderWindow;
             vtkRenderer renderer = renderWindow.GetRenderers().GetFirstRenderer();
             renderer.SetBackground(0.2, 0.3, 0.4);
             renderer.AddActor(actor);
          }
       }
    }