Mega Code Archive
PickCallbackApp renders two interactively rotatable cubes
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/*
* @(#)PickCallbackApp.java 1.0 99/03/25 11:42:40
*
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import java.applet.Applet;
import java.awt.BorderLayout;
import java.awt.Frame;
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.vecmath.Vector3f;
import com.sun.j3d.utils.applet.MainFrame;
import com.sun.j3d.utils.behaviors.picking.PickRotateBehavior;
import com.sun.j3d.utils.behaviors.picking.PickingCallback;
import com.sun.j3d.utils.geometry.ColorCube;
import com.sun.j3d.utils.universe.SimpleUniverse;
// PickCallbackApp renders two interactively rotatable cubes.
public class PickCallbackApp extends Applet {
public class MyCallbackClass extends Object implements PickingCallback{
public void transformChanged(int type, TransformGroup tg) {
System.out.println("picking");
}
}
public BranchGroup createSceneGraph(Canvas3D canvas) {
// Create the root of the branch graph
BranchGroup objRoot = new BranchGroup();
TransformGroup objRotate = null;
PickRotateBehavior pickRotate = null;
Transform3D transform = new Transform3D();
BoundingSphere behaveBounds = new BoundingSphere();
// create ColorCube and PickRotateBehavior objects
transform.setTranslation(new Vector3f(-0.6f, 0.0f, -0.6f));
objRotate = new TransformGroup(transform);
objRotate.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
objRotate.setCapability(TransformGroup.ALLOW_TRANSFORM_READ);
objRotate.setCapability(TransformGroup.ENABLE_PICK_REPORTING);
objRoot.addChild(objRotate);
objRotate.addChild(new ColorCube(0.4));
pickRotate = new PickRotateBehavior(objRoot, canvas, behaveBounds);
objRoot.addChild(pickRotate);
PickingCallback myCallback = new MyCallbackClass();
// Register the class callback to be called
pickRotate.setupCallback(myCallback);
// add a second ColorCube object to the scene graph
transform.setTranslation(new Vector3f( 0.6f, 0.0f, -0.6f));
objRotate = new TransformGroup(transform);
objRotate.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
objRotate.setCapability(TransformGroup.ALLOW_TRANSFORM_READ);
objRotate.setCapability(TransformGroup.ENABLE_PICK_REPORTING);
objRoot.addChild(objRotate);
objRotate.addChild(new ColorCube(0.4));
// Let Java 3D perform optimizations on this scene graph.
objRoot.compile();
return objRoot;
} // end of CreateSceneGraph method of PickCallbackApp
// Create a simple scene and attach it to the virtual universe
public PickCallbackApp() {
setLayout(new BorderLayout());
Canvas3D canvas3D = new Canvas3D(null);
add("Center", canvas3D);
// SimpleUniverse is a Convenience Utility class
SimpleUniverse simpleU = new SimpleUniverse(canvas3D);
BranchGroup scene = createSceneGraph(canvas3D);
// This will move the ViewPlatform back a bit
simpleU.getViewingPlatform().setNominalViewingTransform();
simpleU.addBranchGraph(scene);
} // end of PickCallbackApp (constructor)
// The following allows this to be run as an application or as an applet
public static void main(String[] args) {
System.out.print("PickCallbackApp.java \n- a demonstration of using the PickRotateBehavior ");
System.out.println("utility class to provide interaction in a Java 3D scene.");
System.out.println("Hold the mouse button over a cube then move the mouse to make that cube rotate.");
System.out.println("This is a simple example progam from The Java 3D API Tutorial.");
System.out.println("The Java 3D Tutorial is available on the web at:");
System.out.println("http://www.sun.com/desktop/java3d/collateral");
Frame frame = new MainFrame(new PickCallbackApp(), 256, 256);
} // end of main (method of PickCallbackApp)
} // end of class PickCallbackApp
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