# Hexahedron

VTKExamples/CSharp/GeometricObjects/Hexahedron

### Description¶

This example creates eight points and creates a hexahedron from the 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

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### Code¶

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

private void Hexahedron() {
// Setup the coordinates of eight points
// (faces must be in counter clockwise order as viewed from the outside)
double[,] p = new double[,] {
{ 0.0, 0.0, 0.0 },
{ 1.0, 0.0, 0.0 },
{ 1.0, 1.0, 0.0 },
{ 0.0, 1.0, 0.0 },
{ 0.0, 0.0, 1.0 },
{ 1.0, 0.0, 1.0 },
{ 1.0, 1.0, 1.0 },
{ 0.0, 1.0, 1.0 }
};

// Create the points
vtkPoints points = vtkPoints.New();
for(int i = 0; i < 8; i++)
points.InsertNextPoint(p[i, 0], p[i, 1], p[i, 2]);

// Create a hexahedron from the points
vtkHexahedron hex = vtkHexahedron.New();
for(int i = 0; i < 8; i++)
hex.GetPointIds().SetId(i, i);

// Add the hexahedron to a cell array
vtkCellArray hexs = vtkCellArray.New();
hexs.InsertNextCell(hex);

// Add the points and hexahedron to an unstructured grid
vtkUnstructuredGrid uGrid = vtkUnstructuredGrid.New();
uGrid.SetPoints(points);
uGrid.InsertNextCell(hex.GetCellType(), hex.GetPointIds());

// Visualize
vtkDataSetMapper mapper = vtkDataSetMapper.New();
mapper.SetInput(uGrid);
vtkActor actor = vtkActor.New();
actor.SetMapper(mapper);
actor.GetProperty().SetLineWidth(4);
vtkRenderWindow renderWindow = renderWindowControl1.RenderWindow;
vtkRenderer renderer = renderWindow.GetRenderers().GetFirstRenderer();
renderer.SetBackground(0.2, 0.3, 0.4);