Re: java 3d picking

Martijn Mulder wrote: 

You typically construct a Behavior node in your app and let it wake up on a
mouse event.
Send your code for us to shoot at.



I know my code could be better-looking, but atm I just try to make it run. All I have atm are 4*4 color cubes that should be replaces by some single-colored boxes you can click at to shoot at them.

... here it is - and thx for your help :):

package battleships.gui3d;

import java.awt.BorderLayout;
import java.awt.FlowLayout;
import java.awt.GraphicsConfiguration;
import java.awt.event.ActionEvent;
import java.awt.event.KeyEvent;

import javax.media.j3d.BranchGroup;
import javax.media.j3d.Canvas3D;
import javax.media.j3d.Shape3D;
import javax.media.j3d.Transform3D;
import javax.media.j3d.TransformGroup;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JPanel;
import javax.swing.KeyStroke;
import javax.vecmath.Vector3f;

import com.sun.j3d.utils.geometry.ColorCube;
import com.sun.j3d.utils.universe.SimpleUniverse;

public class Simple3DGame extends JFrame {

	JLabel _statusBarTextLabel = new JLabel("Game status ...");

	public Simple3DGame() {
		super("Battleships 3D");

		JMenuBar menuBar = new JMenuBar();

		JMenu menu = new JMenu("Game");
		menu.setMnemonic(KeyEvent.VK_G);
		menuBar.add(menu);

		JMenuItem menuItem = new JMenuItem("New Game", KeyEvent.VK_N);
		menu.add(menuItem);
		menuItem.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_N,
				ActionEvent.CTRL_MASK));
		menuItem = new JMenuItem("Exit Game", KeyEvent.VK_X);
		menu.add(menuItem);
		menuItem.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_X,
				ActionEvent.CTRL_MASK));

		setSize(600, 600);

		setJMenuBar(menuBar);
		setLayout(new BorderLayout());
		add(BorderLayout.CENTER, create3DPanel());
		add(BorderLayout.PAGE_END, createStatusBar());
	}

	public JPanel createStatusBar() {
		JPanel panel = new JPanel();
		panel.setLayout(new FlowLayout());
		panel.add(_statusBarTextLabel);
		return panel;
	}

	public JPanel create3DPanel() {
		JPanel panel = new JPanel();
		panel.setLayout(new BorderLayout());
		GraphicsConfiguration config = SimpleUniverse
				.getPreferredConfiguration();
		Canvas3D canvas3D = new Canvas3D(config);
		panel.add(BorderLayout.CENTER, canvas3D);

		BranchGroup scene = createSceneGraph(canvas3D);
		scene.compile();

		// SimpleUniverse is a Convenience Utility class
		SimpleUniverse simpleU = new SimpleUniverse(canvas3D);

		simpleU.addBranchGraph(scene);

		return panel;
	} // end of HelloJava3Da (constructor) public BranchGroup

	public BranchGroup createSceneGraph(Canvas3D canvas) {
		// Create the root of the branch graph
		BranchGroup objRoot = new BranchGroup();

		int MAX_CUBES_X = 4;
		int MAX_CUBES_Y = 4;

		for (int x = 0; x < MAX_CUBES_X; x++) {
			for (int y = 0; y < MAX_CUBES_Y; y++) {
				BranchGroup objGroup = new BranchGroup();
				objRoot.addChild(objGroup);
				Transform3D transform = new Transform3D();
				float newX = (MAX_CUBES_X / -2) * 0.3f + 0.15f + (0.3f * x);
				float newY = (MAX_CUBES_Y / -2) * 0.3f + 0.15f + (0.3f * y);
				System.out.println(newX + " " + newY);
				transform.setTranslation(new Vector3f(newX, newY, -3.0f));
				TransformGroup objRotate = new TransformGroup(transform);
				objRotate.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
				objRotate.setCapability(TransformGroup.ALLOW_TRANSFORM_READ);
				objRotate.setCapability(TransformGroup.ENABLE_PICK_REPORTING);
				objGroup.addChild(objRotate);
				Shape3D shape = new ColorCube(0.1);
				objRotate.addChild(shape);
				// XXX add behavior here?
				// PickRotateBehavior pickRotate = new PickRotateBehavior(
				// objGroup, canvas, shape.getBounds());
				// objRotate.addChild(pickRotate);
			}
		}

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

		return objRoot;
	}

	public static void main(String args[]) {
		JFrame gameFrame = new Simple3DGame();
		gameFrame.setVisible(true);
	}
}

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