How to make a sphere clickable

Question

Hi guys,
I've been programming in Java for a while, and am very new to Java3D. I have the code below which displays a simple sphere in a box. I have some things I'd like to do but am unsure of how to go about them.
import com.sun.j3d.utils.geometry.*;
import com.sun.j3d.utils.universe.*;
import javax.media.j3d.*;
import javax.vecmath.*;
import com.sun.j3d.utils.behaviors.mouse.MouseWheelZoom;
import java.awt.event.*;
import java.awt.event.WindowAdapter;
import java.awt.*;
public class prototype1 {
public prototype1() {
SimpleUniverse universe = new SimpleUniverse();
BranchGroup group = new BranchGroup();
Sphere sphere = new Sphere(0.5f);
TransformGroup maing = new TransformGroup();
maing.addChild(sphere);
   group.addChild(maing);
   Color3f light1Color = new Color3f(1.8f, 0.1f, 0.1f);
   BoundingSphere bounds = new BoundingSphere(new Point3d(0.0,0.0,0.0), 100.0);
   Vector3f light1Direction = new Vector3f(4.0f, -7.0f, -12.0f);
   DirectionalLight light1 = new DirectionalLight(light1Color, light1Direction);
   light1.setInfluencingBounds(bounds);
   group.addChild(light1);
   universe.getViewingPlatform().setNominalViewingTransform();
   universe.addBranchGraph(group);
public static void main(String[] args) { new prototype1(); }
}The first thing I cannot do is figure out how to resize the window that the sphere appears in.
The second thing I cannot do is to make the sphere clickable, so that when you click on it a simple System.out.println occurs. I have looked around and found a group.setPickable(true); sort of statement, can this be applied here? Or is a better method to have a button over the sphere and make it invisible? Or is there some way to detect the co-ordinates of the panel that have been clicked? If anyone has any ideas or can point me towards some good tutorials that would be fanatastic,
Thanks
Beccy

Answer 1

Hi!
Right have figured out the first problem by myself!
This is my code so far:
import com.sun.j3d.utils.geometry.*;
import com.sun.j3d.utils.universe.*;
import javax.media.j3d.*;
import javax.swing.BoxLayout;
import javax.swing.JFrame;
import javax.vecmath.*;
import com.sun.j3d.utils.behaviors.mouse.MouseWheelZoom;
import java.awt.event.*;
import java.awt.*;
public class prototype1 {
public prototype1() {
     JFrame.setDefaultLookAndFeelDecorated(true);
     JFrame frame = new JFrame("Prototype Visualisation");
     frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
     Panel canvasPanel = new Panel();
     canvasPanel.setLayout(new BoxLayout(canvasPanel, BoxLayout.Y_AXIS));
     GraphicsConfiguration config = SimpleUniverse
            .getPreferredConfiguration();
     Canvas3D canvas = new Canvas3D(config);
     canvas.setSize(700,450);
     canvasPanel.add(canvas);
     frame.add(canvasPanel);
     frame.pack();
     frame.setVisible(true);
   SimpleUniverse universe = new SimpleUniverse(canvas);
   BranchGroup group = new BranchGroup();
   Sphere sphere = new Sphere(0.1f);
   sphere.setPickable(true);
   TransformGroup maing = new TransformGroup();
   maing.addChild(sphere);
   group.addChild(maing);
   Color3f light1Color = new Color3f(1.8f, 0.1f, 0.1f);
   BoundingSphere bounds = new BoundingSphere(new Point3d(0.0,0.0,0.0), 100.0);
   Vector3f light1Direction = new Vector3f(4.0f, -7.0f, -12.0f);
   DirectionalLight light1 = new DirectionalLight(light1Color, light1Direction);
   light1.setInfluencingBounds(bounds);
   group.addChild(light1);
   //group.setPickable(true);
   universe.getViewingPlatform().setNominalViewingTransform();
   //TransformGroup cameraTransform = universe.getViewingPlatform().getViewPlatformTransform();
   //cameraTransform.setTransform(getCameraTransform(5.0));
   // add the group of objects to the Universe
   universe.addBranchGraph(group);
public static void main(String[] args) { new prototype1(); }
}