# 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

Other Languages

See (Cxx), (Python)

Question

### 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);