import java.awt.*;
import java.awt.event.*;
import com.sun.j3d.utils.geometry.*;
import com.sun.j3d.utils.universe.*;
import javax.media.j3d.*;
import javax.vecmath.*;
import javax.swing.*;

public class Tetrahedron extends JFrame
{

  public Tetrahedron()
  {
    initComponents ();
    setSize(600, 600);
    GraphicsConfiguration graphicsConfig =
      SimpleUniverse.getPreferredConfiguration();
    Canvas3D canvas = new Canvas3D(graphicsConfig);
    getContentPane().add("Center", canvas);
    BasicUniverse universe = new BasicUniverse(canvas, 8.0f);

    /* Generate a branch graph with a Tetrahedron
       and attach it to the scene graph */
    BranchGroup scene = createTetrahedronGraph();
    universe.addBranchGraph(scene);
  }

  public BranchGroup createTetrahedronGraph()
  {
    BranchGroup objRoot = new BranchGroup();

    // Create the geometry arrays -
    //   - a  4 element co-ordinate array of vertices
    //   - a 12 element index array (4 faces by 3 vertices each)
    IndexedTriangleArray TetrahedronGeometry =
       new IndexedTriangleArray(4,
           GeometryArray.COORDINATES|GeometryArray.COLOR_3,
           12);

    // Generate the co-ordinate array for the 4 vertices
    Point3d vertices[] = new Point3d[4];
    vertices[0]= new Point3d(-1.0,-1.0,0.0);
    vertices[1]= new Point3d(1.0,-1.0,0.0);
    vertices[2]= new Point3d(0.0,1.0,0.0);
    vertices[3]= new Point3d(0.0,0.0,2.0);
    TetrahedronGeometry.setCoordinates(0,vertices);

    // Generate an indexed array which defines the co-ordinates of the 4 faces
    int faceIndices[] = {
        0,2,1,  // Base
	0,1,3,	// Side 1
	2,0,3,	// Side 2
	1,2,3	// Side 3
       };
    TetrahedronGeometry.setCoordinateIndices(0,faceIndices);

    // Generate the colour array for the 4 vertices
    Color3f colours[] = new Color3f[4];
    colours[0]= new Color3f(1.0f,1.0f,1.0f);
    colours[1]= new Color3f(1.0f,0.0f,0.0f);
    colours[2]= new Color3f(0.0f,1.0f,0.0f);
    colours[3]= new Color3f(0.0f,0.0f,1.0f);
    TetrahedronGeometry.setColors(0,colours);

    // Generate an indexed array which defines the colours of the 4 faces
    int colourIndices[] = {
        0,2,1,  // Base
	0,1,3,	// Side 1
	2,0,3,	// Side 2
	1,2,3	// Side 3
       };
    TetrahedronGeometry.setColorIndices(0,colourIndices);

    // Create the Tetrahedron shape object
    Shape3D Tetrahedron = new Shape3D(TetrahedronGeometry);

    // Set the appearance of the Tetrahedron
    /*    PolygonAttributes TetrahedronAttributes = new PolygonAttributes();
    TetrahedronAttributes.setPolygonMode(PolygonAttributes.POLYGON_LINE);
    Appearance appear = new Appearance();
    appear.setPolygonAttributes(TetrahedronAttributes);
    Tetrahedron.setAppearance(appear);*/

    // Add the Tetrahedron into the branch graph
    objRoot.addChild(Tetrahedron);

    return objRoot;
  }

  private void initComponents()
  {
    addWindowListener (new WindowAdapter () {
    public void windowClosing (WindowEvent evt) {exitForm (evt);} } );
  }

  /*** Exit Application ***/
  private void exitForm(WindowEvent evt) {System.exit (0);}

  public static void main(String[] args)
  {
    Tetrahedron myShape = new Tetrahedron();
    myShape.setVisible(true);
  }
}