readraster.java

使用java3d进行,obj文件的加载.和实现全方位的3维场景交互

/*
 * $RCSfile: ReadRaster.java,v $
 *
 * Copyright (c) 2007 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: 2007/02/09 17:21:51 $
 * $State: Exp $
 */

package org.jdesktop.j3d.examples.text3d;

import java.applet.Applet;
import java.awt.BorderLayout;
import java.awt.event.*;
import java.awt.image.DataBufferInt;
import java.awt.image.BufferedImage;
import java.awt.GraphicsConfiguration;
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 java.util.Enumeration;

public class ReadRaster extends Applet {

    private SimpleUniverse u = null;

    public BranchGroup createSceneGraph(BufferedImage bImage, 
					Raster readRaster) {

	// Create the root of the branch graph
	BranchGroup objRoot = new BranchGroup();

	// Create a Raster shape. Add it to the root of the subgraph

        ImageComponent2D drawImageComponent = new ImageComponent2D(
		ImageComponent.FORMAT_RGB, bImage, true, true);

        Raster drawRaster= new Raster(new Point3f(0.0f, 0.0f, 0.0f),
		Raster.RASTER_COLOR, 0, 0, bImage.getWidth(), 
		bImage.getHeight(), drawImageComponent, null);
	Shape3D shape = new Shape3D(drawRaster);
	drawRaster.setCapability(Raster.ALLOW_IMAGE_WRITE);
	objRoot.addChild(shape);

	// Ceate the transform greup node and initialize it to the
	// identity.  Enable the TRANSFORM_WRITE capability so that
	// our behavior code can modify it at runtime.  Add it to the
	// root of the subgraph.
	TransformGroup objTrans = new TransformGroup();
	objTrans.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);

        TransformGroup cubeScale = new TransformGroup();
        Transform3D t3d = new Transform3D();
        t3d.setTranslation(new Vector3d(-0.5, 0.5, 0.0));
        cubeScale.setTransform(t3d);

        cubeScale.addChild(objTrans);
        objRoot.addChild(cubeScale);

	// Create a simple shape leaf node, add it to the scene graph.
	objTrans.addChild(new ColorCube(0.3));

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

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

	return objRoot;
    }

    public ReadRaster() {
    }

    public void init() {
	
    	int width = 128;
	int height = 128;

	ImageComponent2D readImageComponent = new ImageComponent2D(
		ImageComponent.FORMAT_RGB, width, height, false, true);

	Raster readRaster = new Raster(new Point3f(0.0f,0.0f,0.0f),
				       Raster.RASTER_COLOR, 0, 0, width,
				       height, readImageComponent, null);

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

	Canvas3D c = new myCanvas3D(config, readRaster);
	add("Center", c);

	// Create a simple scene and attach it to the virtual universe
	BufferedImage bImage = new BufferedImage(width, height,
						 BufferedImage.TYPE_INT_RGB);

	BranchGroup scene = createSceneGraph(bImage, readRaster);
	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);
    }

    public void destroy() {
	u.cleanup();
    }

    //
    // The following allows ReadRaster to be run as an application
    // as well as an applet
    //
    public static void main(String[] args) {
	new MainFrame(new ReadRaster(), 256, 256);
    }
}


class myCanvas3D extends Canvas3D {

    Raster readRaster;
    GraphicsContext3D gc;

    public myCanvas3D(GraphicsConfiguration graphicsConfiguration,
	Raster readRaster) {

	super(graphicsConfiguration);
	this.readRaster = readRaster;
        gc = getGraphicsContext3D();
    }

    public void postSwap() {
	super.postSwap();
	synchronized(readRaster) {
            gc.readRaster(readRaster);
	}
    }
}


class myRotationInterpolator extends RotationInterpolator {
    Point3f wPos = new Point3f(0.025f, -0.025f, 0.0f);
    Raster drawRaster;
    Raster readRaster;
    BufferedImage bImage;
    ImageComponent2D newImageComponent;

    public myRotationInterpolator(Raster drawRaster, Raster readRaster,
				Alpha alpha,
                                TransformGroup target,
                                Transform3D axisOfRotation,
                                float minimumAngle,
                                float maximumAngle) {

	super(alpha, target, axisOfRotation, minimumAngle, maximumAngle); 
        this.drawRaster = drawRaster;
        this.readRaster = readRaster;
    }

    public void processStimulus(Enumeration criteria) {

	synchronized(readRaster) {
	    bImage = readRaster.getImage().getImage();
	}
        newImageComponent = new ImageComponent2D(ImageComponent.FORMAT_RGB, 
						bImage, true, true);
	drawRaster.setImage(newImageComponent);
	super.processStimulus(criteria);
    }
}