Raster demo
/*
* @(#)ReadRaster.java 1.14 02/10/21 13:53:38
*
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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);
}
}
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