/*code of sun microsystems*/

import java.applet.Applet;
import java.awt.*;
import java.awt.event.*;
import com.sun.j3d.utils.applet.MainFrame;
import com.sun.j3d.utils.geometry.ColorCube;
import com.sun.j3d.utils.universe.*;
import javax.media.j3d.*;
import javax.vecmath.*;

import com.sun.j3d.utils.behaviors.picking.*;

public class TickTockCollision extends Applet {
    public BranchGroup createSceneGraph(Canvas3D c) {
	// Create the root of the branch graph
	BranchGroup objRoot = new BranchGroup();

        // Create a Transformgroup to scale all objects so they
        // appear in the scene.
        TransformGroup objScale = new TransformGroup();
        Transform3D t3d = new Transform3D();
        t3d.setScale(0.4);
        objScale.setTransform(t3d);
        objRoot.addChild(objScale);

	// Create a bounds for the background and behaviors
   BoundingSphere bounds = new BoundingSphere(new Point3d(0.0,0.0,0.0), 10.0);

	// Set up the background
	Color3f bgColor = new Color3f(0.5f, 0.5f, 0.8f);
	Background bg = new Background(bgColor);
	bg.setApplicationBounds(bounds);
	objScale.addChild(bg);

	// Create the positioning and scaling transform group node.
	Transform3D t = new Transform3D();
	t.set(0.3, new Vector3d(0.0, -1.5, 0.0));
	TransformGroup objTrans3 = new TransformGroup(t);
	objTrans3.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
  objTrans3.setCapability(TransformGroup.ALLOW_TRANSFORM_READ);
  objTrans3.setCapability(TransformGroup.ENABLE_PICK_REPORTING);
  objScale.addChild(objTrans3);

	// Create a simple shape leaf node, add it to the scene graph.
	objTrans3.addChild(new ColorCube());

  PickRotateBehavior pr = new PickRotateBehavior(objRoot, c, bounds);
  objTrans3.addChild(pr);
  PickTranslateBehavior pt = new PickTranslateBehavior(objRoot, c, bounds);
  objTrans3.addChild(pt);

	// Now create a pair of rectangular boxes, each with a collision
	// detection behavior attached.  The behavior will highlight the
	// object when it is in a state of collision.

	Group box1 = createBox(0.3, new Vector3d(-1.3, 0.0, 0.0));
  box1.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
  box1.setCapability(TransformGroup.ALLOW_TRANSFORM_READ);
  box1.setCapability(TransformGroup.ENABLE_PICK_REPORTING);
  pr = new PickRotateBehavior(objRoot, c, bounds);
  box1.addChild(pr);
  pt = new PickTranslateBehavior(objRoot, c, bounds);
  box1.addChild(pt);

	Group box2 = createBox(0.3, new Vector3d( 1.3, 0.0, 0.0));
  box2.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
  box2.setCapability(TransformGroup.ALLOW_TRANSFORM_READ);
  box2.setCapability(TransformGroup.ENABLE_PICK_REPORTING);
  pr = new PickRotateBehavior(objRoot, c, bounds);
  box2.addChild(pr);
  pt = new PickTranslateBehavior(objRoot, c, bounds);
  box2.addChild(pt);

	objScale.addChild(box1);
	objScale.addChild(box2);

        // Have Java 3D perform optimizations on this scene graph.
        objRoot.compile();

	return objRoot;
    }


    private Group createBox(double scale, Vector3d pos) {
	// Create a transform group node to scale and position the object.
	Transform3D t = new Transform3D();
	t.set(scale, pos);
	TransformGroup objTrans = new TransformGroup(t);

	// Create a simple shape leaf node and add it to the scene graph
	Shape3D shape = new Box(0.5, 5.0, 1.0);
	objTrans.addChild(shape);

	// Create a new ColoringAttributes object for the shape's
	// appearance and make it writable at runtime.
	Appearance app = shape.getAppearance();
	ColoringAttributes ca = new ColoringAttributes();
	ca.setColor(0.6f, 0.6f, 0.3f);
	app.setCapability(app.ALLOW_COLORING_ATTRIBUTES_WRITE);
	app.setColoringAttributes(ca);

	// Create a new Behavior object that will perform the collision
	// detection on the specified object, and add it into
	// the scene graph.
	CollisionDetector cd = new CollisionDetector(shape);
	BoundingSphere bounds =
	    new BoundingSphere(new Point3d(0.0,0.0,0.0), 100.0);
	cd.setSchedulingBounds(bounds);

	// Add the behavior to the scene graph
	objTrans.addChild(cd);

	return objTrans;
    }


    public TickTockCollision() {
	setLayout(new BorderLayout());
        GraphicsConfiguration config =
           SimpleUniverse.getPreferredConfiguration();

        Canvas3D c = new Canvas3D(config);
	add("Center", c);

	// Create a simple scene and attach it to the virtual universe
	BranchGroup scene = createSceneGraph(c);
	SimpleUniverse u = new SimpleUniverse(c);

        // This will move the ViewPlatform back a bit so the
        // objects in the scene can be viewed.
        u.getViewingPlatform().setNominalViewingTransform();

	u.addBranchGraph(scene);
    }

    //
    // The following allows TickTockCollision to be run as an application
    // as well as an applet
    //
    public static void main(String[] args) {
	new MainFrame(new TickTockCollision(), 400, 400);
    }
}