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 Gasket extends JFrame
{

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

    // Rotate the view platform by PI/4 radians about X & Y
    TransformGroup cubeTransform = universe.getViewPlatformTransform();
    Transform3D transform = new Transform3D();
    transform.rotX(Math.PI/4.0);
    Transform3D yRotate = new Transform3D();
    yRotate.rotY(Math.PI/4.0);
    Transform3D currentTransform = new Transform3D();
    transform.mul(yRotate);
    cubeTransform.getTransform(currentTransform);
    transform.mul(currentTransform);
    cubeTransform.setTransform(transform);

    /* Generate a branch graph for a cube with holes
       and attach it to the scene graph */
    BranchGroup scene = createGasketGraph();
    universe.addBranchGraph(scene);
  }

public BranchGroup createGasketGraph()
{   
    BranchGroup objRoot = new BranchGroup();
    GeometryInfo gasket = new GeometryInfo(GeometryInfo.POLYGON_ARRAY);

    // Generate the co-ordinate array for the 6 faces and 3 holes
    double[] gasketCoordinates = {
    // Bottom face of cube
    -1,-1,-1,
     1,-1,-1,
     1,-1, 1,
    -1,-1, 1,
    // Hole in bottom face
    -0.5,-1,-0.5,
     0.5,-1,-0.5,
     0.5,-1, 0.5,
    -0.5,-1, 0.5,
    // Front face of cube
     1, 1, 1,
    -1, 1, 1,
    -1,-1, 1,
     1,-1, 1,
    // Hole in front face
     0.5, 0.5, 1,
    -0.5, 0.5, 1,
    -0.5,-0.5, 1,
     0.5,-0.5, 1,
    // Right face of cube
     1, 1, 1,
     1,-1, 1,
     1,-1,-1,
     1, 1,-1,
    // Hole in right face
     1, 0.5, 0.5,
     1,-0.5, 0.5,
     1,-0.5,-0.5,
     1, 0.5,-0.5,
    // Left face of cube
     -1,-1,-1,
     -1,-1, 1,
     -1, 1, 1,
     -1, 1,-1,
    // Top face of cube
      1, 1, 1,
      1, 1,-1,
     -1, 1,-1,
     -1, 1, 1,
    // Back face of cube
     -1,-1,-1,
     -1, 1,-1,
      1, 1,-1,
      1,-1,-1
    };
    
    gasket.setCoordinates(gasketCoordinates);

    // Generate a strip count array which associates co-ordinates with polygons
    int gasketStripCount[] = {
        4,4,    // Bottom face and its hole
        4,4,    // Front face and its hole
        4,4,    // Right face and its hole
	4,	// Left face
	4,	// Top face
	4	// Back face
        };
    gasket.setStripCounts(gasketStripCount);

    // Generate a contour count array which speficies polygons in the
    // strip count array to be containers and holes
    int gasketContourCount[] = {
        2,	// The first 2 element are the bottom and its hole
        2,      // The next 2 are the front face and its hole
        2,      // Then the right face and its hole
        1,      // The left face has no hole
        1,      // Nor does the top face
        1,      // Finally the back face brings up the rear
        };
    gasket.setContourCounts(gasketContourCount);

    // Perform an additional random triangulation
    //    Triangulator triang = new Triangulator(1);
    //    triang.triangulate(gasket);
 
    // Generate normals for each vertex
    NormalGenerator norma = new NormalGenerator();
    norma.generateNormals(gasket);

    // Turn into a triangle strip array
    Stripifier stripper = new Stripifier();
    stripper.stripify(gasket);

    // Create the gasket shape object
    Shape3D gasketShape = new Shape3D();
    gasketShape.setGeometry(gasket.getGeometryArray());
 
    // Set the appearance of the gasket
    Appearance gasketAppearance = new Appearance();
    
    // Wire frame  (comment this out for a polygon fill)
    PolygonAttributes gasketPolyAtts = new PolygonAttributes();
    gasketPolyAtts.setPolygonMode(PolygonAttributes.POLYGON_LINE);
    gasketAppearance.setPolygonAttributes(gasketPolyAtts);
    
    // Make it blue
    ColoringAttributes gasketColAtts = new ColoringAttributes();
    gasketColAtts.setColor(new Color3f(0.0f,0.0f,1.0f));
    gasketAppearance.setColoringAttributes(gasketColAtts);

    gasketShape.setAppearance(gasketAppearance);

    // Add the gasket to the branch group
    objRoot.addChild(gasketShape);

    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)
  {
    Gasket myShape = new Gasket();
    myShape.setVisible(true);
  }
}