Java tutorial
/* * @(#)ReadRaster.java 1.14 02/10/21 13:53:38 * * Copyright (c) 1996-2002 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: * - Redistributions 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 AND ITS LICENSORS SHALL NOT BE * LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING * OR DISTRIBUTING THE 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 SOFTWARE, EVEN IF SUN HAS BEEN ADVISED OF THE POSSIBILITY * OF SUCH DAMAGES. * * You acknowledge that Software is not designed,licensed or intended for use in * the design, construction, operation or maintenance of any nuclear facility. */ import java.applet.Applet; import java.awt.BorderLayout; import java.awt.GraphicsConfiguration; import java.awt.image.BufferedImage; import java.util.Enumeration; import javax.media.j3d.Alpha; import javax.media.j3d.BoundingSphere; import javax.media.j3d.BranchGroup; import javax.media.j3d.Canvas3D; import javax.media.j3d.GraphicsContext3D; import javax.media.j3d.ImageComponent; import javax.media.j3d.ImageComponent2D; import javax.media.j3d.Raster; import javax.media.j3d.RotationInterpolator; import javax.media.j3d.Shape3D; import javax.media.j3d.Transform3D; import javax.media.j3d.TransformGroup; import javax.vecmath.Point3d; import javax.vecmath.Point3f; import javax.vecmath.Vector3d; import com.sun.j3d.utils.applet.MainFrame; import com.sun.j3d.utils.geometry.ColorCube; import com.sun.j3d.utils.universe.SimpleUniverse; 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); 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); 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_ARGB); 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); drawRaster.setImage(newImageComponent); super.processStimulus(criteria); } }