AWT Interaction: Transform 3D
/*
* @(#)AWTInteraction.java 1.12 02/10/21 13:35:20
*
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import java.applet.Applet;
import java.awt.BorderLayout;
import java.awt.GraphicsConfiguration;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseEvent;
import java.util.Enumeration;
import javax.media.j3d.Behavior;
import javax.media.j3d.BoundingSphere;
import javax.media.j3d.BranchGroup;
import javax.media.j3d.Canvas3D;
import javax.media.j3d.Transform3D;
import javax.media.j3d.TransformGroup;
import javax.media.j3d.WakeupCriterion;
import javax.media.j3d.WakeupOnBehaviorPost;
import javax.swing.JButton;
import javax.swing.JPanel;
import javax.vecmath.Point3d;
import com.sun.j3d.utils.applet.MainFrame;
import com.sun.j3d.utils.geometry.ColorCube;
import com.sun.j3d.utils.universe.SimpleUniverse;
public class AWTInteraction extends Applet { //implements ActionListener {
TransformGroup objTrans;
float angle = 0.0f;
Transform3D trans = new Transform3D();
JButton rotateB = new JButton("Rotate");
private SimpleUniverse u = null;
public BranchGroup createSceneGraph() {
// Create the root of the branch graph
BranchGroup objRoot = new BranchGroup();
// Create the transform group 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.
objTrans = new TransformGroup();
objTrans.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
objRoot.addChild(objTrans);
// Create a simple shape leaf node, add it to the scene graph.
objTrans.addChild(new ColorCube(0.4));
// create the AWTInteractionBehavior
AWTInteractionBehavior awtBehavior = new AWTInteractionBehavior(
objTrans);
rotateB.addActionListener(awtBehavior);
BoundingSphere bounds = new BoundingSphere(new Point3d(0.0, 0.0, 0.0),
100.0);
awtBehavior.setSchedulingBounds(bounds);
objRoot.addChild(awtBehavior);
return objRoot;
}
public AWTInteraction() {
}
public void init() {
setLayout(new BorderLayout());
GraphicsConfiguration config = SimpleUniverse
.getPreferredConfiguration();
Canvas3D c = new Canvas3D(config);
add("Center", c);
JPanel p = new JPanel();
p.add(rotateB);
add("North", p);
// Create a simple scene and attach it to the virtual universe
BranchGroup scene = createSceneGraph();
scene.setCapability(BranchGroup.ALLOW_BOUNDS_READ);
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 HelloUniverse to be run as an application
// as well as an applet
//
public static void main(String[] args) {
new MainFrame(new AWTInteraction(), 256, 256);
}
}
class AWTInteractionBehavior extends Behavior implements ActionListener {
private TransformGroup transformGroup;
private Transform3D trans = new Transform3D();
private WakeupCriterion criterion;
private float angle = 0.0f;
// create a new AWTInteractionBehavior
public AWTInteractionBehavior(TransformGroup tg) {
transformGroup = tg;
}
// initialize the behavior to wakeup on a behavior post with the id
// MouseEvent.MOUSE_CLICKED
public void initialize() {
criterion = new WakeupOnBehaviorPost(this, MouseEvent.MOUSE_CLICKED);
wakeupOn(criterion);
}
// processStimulus to rotate the cube
public void processStimulus(Enumeration criteria) {
angle += Math.toRadians(10.0);
trans.rotY(angle);
transformGroup.setTransform(trans);
wakeupOn(criterion);
}
// when the mouse is clicked, postId for the behavior
public void actionPerformed(ActionEvent e) {
postId(MouseEvent.MOUSE_CLICKED);
}
}
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