/* 
 * Java3D Psuedo Transparent Window Hack 
 *
 * kishan at hackorama dot com | www.hackoram.com | 2004/2005
 */

import java.awt.*;
import java.awt.event.*;
import java.awt.image.BufferedImage;
import java.util.Date;
import java.text.DateFormat;
import javax.swing.*;
import javax.media.j3d.*;
import javax.vecmath.*;
import com.sun.j3d.utils.geometry.ColorCube;
import com.sun.j3d.utils.image.TextureLoader;
import com.sun.j3d.utils.universe.*;

public class Glass {

	private Rectangle baseRect = null;
	private Robot robot = null;
	private BufferedImage baseBuffer = null;
	private static final String J3DURL = "http://java.sun.com/" 
						+ "products/java-media/3D" ;
	public Glass() {

		try {
			robot = new Robot();
		} catch (Exception e) {
			exitOnError(e, "Failed to create the Robot");
		}

		int width = 500;
		int height = 200;
		Dimension sd = Toolkit.getDefaultToolkit().getScreenSize();
		baseRect = new Rectangle(sd.width / 2 - width / 2, 
				sd.height / 2 - height / 2, width, height);
		baseBuffer = robot.createScreenCapture(baseRect);

		GlassWin glass = null;
		try{
			glass = new GlassWin();
		} catch( Exception e){
			exitOnError(e, "Please Instal Java3D from " + J3DURL );  
		}
		glass.show();

		glass.setBounds(sd.width/2 - width/2, 
			sd.height/2 - height/2, width, height);
	}

	public void exitOnError(Exception e, String msg) {
		System.out.println("\n\n-----------------------------------");
		System.out.println("Glass Error: "+ msg);
		System.out.println("Glass Error: Exception Details");
		System.out.println(e);
		System.out.println("------------------------------------\n\n");
		System.exit(1);
	}

	class GlassWin extends JWindow {

		GraphicsConfiguration config =
				SimpleUniverse.getPreferredConfiguration();

		public GlassWin() {
			Canvas3D mycanvas = null;	
			try{
				mycanvas = new Canvas3D(config);
			} catch ( Exception e ) {
				exitOnError(e, "Looks like you dont have" + 
						" a 3D Capable Display" );
			}
			getContentPane().add(mycanvas, BorderLayout.CENTER);
			BranchGroup scene = createSceneGraph();
			u = new SimpleUniverse(mycanvas);
			u.getViewingPlatform().setNominalViewingTransform();
			u.addBranchGraph(scene);
		}

		public void update(Graphics g) {
			baseBuffer = robot.createScreenCapture(baseRect);
		}

		public void paint(Graphics g) {
		}

		private SimpleUniverse u = null;

		public BranchGroup createSceneGraph() {

			BranchGroup objRoot = new BranchGroup();
			
			TransformGroup objScale = new TransformGroup();
			Transform3D t3d = new Transform3D();
			t3d.setScale(0.4);
			objScale.setTransform(t3d);
			objRoot.addChild(objScale);

			TransformGroup objTrans = new TransformGroup();
			objTrans.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
			objScale.addChild(objTrans);
			Color3f black = new Color3f(0.0f, 0.0f, 0.0f);
			Color3f white = new Color3f(1.0f, 1.0f, 1.0f);

			Color3f fontColor = new Color3f(1.0f, 0.2f, 0.4f);
			ColoringAttributes ca = new ColoringAttributes();
			ca.setColor(fontColor);

			Appearance fontapp = new Appearance();
			Material mm = new Material();
			mm.setLightingEnable(true);
			fontapp.setMaterial(mm);
			fontapp.setColoringAttributes(ca);

			Appearance app = new Appearance();
			TransparencyAttributes ta = new TransparencyAttributes();
			ta.setTransparencyMode(ta.BLENDED);
			ta.setTransparency(0.5f);
			app.setTransparencyAttributes(ta);

			PolygonAttributes pa = new PolygonAttributes();
			pa.setCullFace(pa.CULL_NONE);
			app.setPolygonAttributes(pa);

			Color3f objColor = new Color3f(0.7f, 0.8f, 1.0f);
			app.setMaterial(new Material(objColor, black, objColor, black, 1.0f));

			ColorCube myObject = new ColorCube(0.8);
			myObject.setAppearance(app);
			objTrans.addChild(myObject);

			Font3D f3d;
			DateFormat df = DateFormat.getTimeInstance(DateFormat.SHORT);
			String textString = df.format(new Date());
			double tessellation = 0.0;
			if (tessellation > 0.0) {
				f3d = new Font3D(new Font("TestFont", 
								Font.PLAIN, 1),
						tessellation,
						new FontExtrusion());
			} else {
				f3d = new Font3D(new Font("TestFont", 
								Font.PLAIN, 1),
						new FontExtrusion());
			}
			Text3D txt = new Text3D(f3d, textString, 
					new Point3f(-2.2f, -0.35f, 0.0f));
			Shape3D sh = new Shape3D();
			sh.setGeometry(txt);
			sh.setAppearance(fontapp);

			objTrans.addChild(sh);

			Transform3D yAxis = new Transform3D();
			Alpha rotationAlpha = new Alpha(-1, 4000);

			RotationInterpolator rotator =
				new RotationInterpolator(rotationAlpha, 
						objTrans, yAxis, 0.0f, 
						(float) Math.PI * 2.0f);
			BoundingSphere bounds =
					new BoundingSphere(new Point3d(0.0, 0.0, 0.0), 100.0);
			rotator.setSchedulingBounds(bounds);
			objTrans.addChild(rotator);

			TextureLoader bgTexture = new TextureLoader(baseBuffer);
			Background bg = new Background(bgTexture.getImage());
			bg.setApplicationBounds(bounds);
			objRoot.addChild(bg);

			Color3f ambientColor = new Color3f(0.3f, 0.3f, 0.3f);
			AmbientLight ambientLightNode = new AmbientLight(ambientColor);
			ambientLightNode.setInfluencingBounds(bounds);
			objRoot.addChild(ambientLightNode);

			Color3f light1Color = new Color3f(1.0f, 1.0f, 0.9f);
			Vector3f light1Direction = new Vector3f(1.0f, 1.0f, 1.0f);
			Color3f light2Color = new Color3f(1.0f, 1.0f, 0.9f);
			Vector3f light2Direction = new Vector3f(-1.0f, -1.0f, -1.0f);

			DirectionalLight light1
					 = new DirectionalLight(light1Color, light1Direction);
			light1.setInfluencingBounds(bounds);
			objRoot.addChild(light1);

			DirectionalLight light2
					 = new DirectionalLight(light2Color, light2Direction);
			light2.setInfluencingBounds(bounds);
			objRoot.addChild(light2);

			objRoot.compile();

			return objRoot;
		}
	}

	public static void main(String args[]) {
		System.out.println("Glass - Psuedo Transparent 3D Window ");
		Glass myGlass = new Glass();
	}
}