ticktockcollision.java

java 3d编程的一些例子源代码

/*
 * $RCSfile: TickTockCollision.java,v $
 *
 * Copyright (c) 2006 Sun Microsystems, Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistribution of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 *
 * - Redistribution in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in
 *   the documentation and/or other materials provided with the
 *   distribution.
 *
 * Neither the name of Sun Microsystems, Inc. or the names of
 * contributors may be used to endorse or promote products derived
 * from this software without specific prior written permission.
 *
 * This software is provided "AS IS," without a warranty of any
 * kind. ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND
 * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY
 * EXCLUDED. SUN MICROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL
 * NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF
 * USING, MODIFYING OR DISTRIBUTING THIS SOFTWARE OR ITS
 * DERIVATIVES. IN NO EVENT WILL SUN OR ITS LICENSORS BE LIABLE FOR
 * ANY LOST REVENUE, PROFIT OR DATA, OR FOR DIRECT, INDIRECT, SPECIAL,
 * CONSEQUENTIAL, INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER CAUSED AND
 * REGARDLESS OF THE THEORY OF LIABILITY, ARISING OUT OF THE USE OF OR
 * INABILITY TO USE THIS SOFTWARE, EVEN IF SUN HAS BEEN ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGES.
 *
 * You acknowledge that this software is not designed, licensed or
 * intended for use in the design, construction, operation or
 * maintenance of any nuclear facility.
 *
 * $Revision: 1.3 $
 * $Date: 2006/02/22 00:17:09 $
 * $State: Exp $
 */

package org.jdesktop.j3d.examples.collision;

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

/**
 * Simple Java 3D example program to display how collision work.
 */
public class TickTockCollision extends javax.swing.JFrame {

    private SimpleUniverse univ = null;
    private BranchGroup scene = null;

    public BranchGroup createSceneGraph() {
	// 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), 100.0);

	// Set up the background
	Color3f bgColor = new Color3f(0.05f, 0.05f, 0.2f);
	Background bg = new Background(bgColor);
	bg.setApplicationBounds(bounds);
	objScale.addChild(bg);

	// Create a pair of transform group nodes and initialize them to
	// identity.  Enable the TRANSFORM_WRITE capability so that
	// our behaviors can modify them at runtime.  Add them to the
	// root of the subgraph.
	TransformGroup objTrans1 = new TransformGroup();
	objTrans1.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
	objScale.addChild(objTrans1);

	TransformGroup objTrans2 = new TransformGroup();
	objTrans2.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
	objTrans1.addChild(objTrans2);

	// 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);
	objTrans2.addChild(objTrans3);

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

	// Create a new Behavior object that will perform the desired
	// rotation on the specified transform object and add it into
	// the scene graph.
	Transform3D yAxis1 = new Transform3D();
	yAxis1.rotX(Math.PI/2.0);
	Alpha tickTockAlpha = new Alpha(-1, Alpha.INCREASING_ENABLE |
					Alpha.DECREASING_ENABLE,
					0, 0,
					5000, 2500, 200,
					5000, 2500, 200);

	RotationInterpolator tickTock =
	    new RotationInterpolator(tickTockAlpha, objTrans1, yAxis1,
				     -(float) Math.PI/2.0f,
				     (float) Math.PI/2.0f);
	tickTock.setSchedulingBounds(bounds);
	objTrans2.addChild(tickTock);

	// Create a new Behavior object that will perform the desired
	// rotation on the specified transform object and add it into
	// the scene graph.
	Transform3D yAxis2 = new Transform3D();
	Alpha rotationAlpha = new Alpha(-1, Alpha.INCREASING_ENABLE,
					0, 0,
					4000, 0, 0,
					0, 0, 0);

	RotationInterpolator rotator =
	    new RotationInterpolator(rotationAlpha, objTrans2, yAxis2,
				     0.0f, (float) Math.PI*2.0f);
	rotator.setSchedulingBounds(bounds);
	objTrans2.addChild(rotator);

	// 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));
	Group box2 = createBox(0.3, new Vector3d( 1.3, 0.0, 0.0));

	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, 0.3f, 0.0f);
	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;
    }

    private Canvas3D createUniverse() {
	// Get the preferred graphics configuration for the default screen
	GraphicsConfiguration config =
	    SimpleUniverse.getPreferredConfiguration();

	// Create a Canvas3D using the preferred configuration
	Canvas3D c = new Canvas3D(config);

	// Create simple universe with view branch
	univ = new SimpleUniverse(c);

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

	// Ensure at least 5 msec per frame (i.e., < 200Hz)
	univ.getViewer().getView().setMinimumFrameCycleTime(5);

	return c;
    }

    /**
     * Creates new form TickTockCollision
     */
    public TickTockCollision() {
	// Initialize the GUI components
	initComponents();

	// Create Canvas3D and SimpleUniverse; add canvas to drawing panel
	Canvas3D c = createUniverse();
	drawingPanel.add(c, java.awt.BorderLayout.CENTER);

	// Create the content branch and add it to the universe
	scene = createSceneGraph();
	univ.addBranchGraph(scene);
    }

    // ----------------------------------------------------------------
    
    /** This method is called from within the constructor to
     * initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is
     * always regenerated by the Form Editor.
     */
    // <editor-fold defaultstate="collapsed" desc=" Generated Code ">//GEN-BEGIN:initComponents
    private void initComponents() {
        drawingPanel = new javax.swing.JPanel();

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
        setTitle("TickTockCollision");
        drawingPanel.setLayout(new java.awt.BorderLayout());

        drawingPanel.setPreferredSize(new java.awt.Dimension(700, 700));
        getContentPane().add(drawingPanel, java.awt.BorderLayout.CENTER);

        pack();
    }// </editor-fold>//GEN-END:initComponents
    
    /**
     * @param args the command line arguments
     */
    public static void main(String args[]) {
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new TickTockCollision().setVisible(true);
            }
        });
    }
    
    // Variables declaration - do not modify//GEN-BEGIN:variables
    private javax.swing.JPanel drawingPanel;
    // End of variables declaration//GEN-END:variables
    
}