Posted by philjord on Jul 23, 2018; 12:08pm
URL: https://forum.jogamp.org/Objects-fall-outside-simpleuniverse-tp4039062p4039067.html

I had to make up a few parts, but replacing your sphere with a simple color cube from teh utils I can see it on screen farily readily. The orbit behavior allows me to rotat it around and see it even better. For reference I've put 4 small cube on at the origin and 1 meter in each positive axis.

This test program looks good, so I suspect the geometry or appearance of your sphere6 which you don't include might not be valid or visible, can you include a bit more code?

Thanks


package _testcase;

import java.applet.Applet;
import java.awt.BorderLayout;
import java.awt.GraphicsConfiguration;
import java.awt.Panel;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;

import javax.media.j3d.BoundingSphere;
import javax.media.j3d.BranchGroup;
import javax.media.j3d.Canvas3D;
import javax.media.j3d.Group;
import javax.media.j3d.Transform3D;
import javax.media.j3d.TransformGroup;
import javax.swing.Timer;
import javax.vecmath.Quat4f;
import javax.vecmath.Vector3f;

import com.sun.j3d.utils.applet.MainFrame;
import com.sun.j3d.utils.behaviors.vp.OrbitBehavior;
import com.sun.j3d.utils.geometry.ColorCube;
import com.sun.j3d.utils.universe.SimpleUniverse;



public class TestForSphere extends Applet implements ActionListener, KeyListener
{

        TransformGroup objTransYour6Sph;
        Timer timer;
        ColorCube sphere6 = new ColorCube(0.1f);

        public BranchGroup createSceneGraph()
        {
                // Create the root of the branch graph
                BranchGroup objRoot = new BranchGroup();
                objRoot.setCapability(Group.ALLOW_CHILDREN_EXTEND);
                //Sphere 6
                TransformGroup sphere6TransGroup = translate(sphere6, new Vector3f(0.6f, 0.93f, 0.0f));
                objTransYour6Sph = new TransformGroup();
                objTransYour6Sph.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
                objRoot.addChild(objTransYour6Sph);
                objTransYour6Sph.addChild(sphere6TransGroup);

                objRoot.addChild(translate(new ColorCube(0.02), new Vector3f(0.0f, 0.0f, 0.0f)));
                objRoot.addChild(translate(new ColorCube(0.02), new Vector3f(0.5f, 0.0f, 0.0f)));
                objRoot.addChild(translate(new ColorCube(0.02), new Vector3f(0.0f, 0.5f, 0.0f)));
                objRoot.addChild(translate(new ColorCube(0.02), new Vector3f(0.0f, 0.0f, 0.5f)));
                return objRoot;
        }

        private TransformGroup translate(ColorCube sphere62, Vector3f vector3f)
        {
                TransformGroup tg = new TransformGroup();
                tg.setTransform(new Transform3D(new Quat4f(0, 0, 0, 1), vector3f, 1));
                tg.addChild(sphere62);
                return tg;
        }

        public TestForSphere()
        {

                setLayout(new BorderLayout());
                GraphicsConfiguration config = SimpleUniverse.getPreferredConfiguration();
                Canvas3D c = new Canvas3D(config);
                add("Center", c);
                c.addKeyListener(this);
                timer = new Timer(100, this);

                //timer.start();
                Panel p = new Panel();
                // p.add(go);
                add("North", p);
                // go.addActionListener(this);
                // go.addKeyListener(this);

                // Create a simple scene and attach it to the virtual universe
                BranchGroup scene = createSceneGraph();
                SimpleUniverse u = new SimpleUniverse(c);
                u.getViewingPlatform().setNominalViewingTransform();

                u.addBranchGraph(scene);
                //u.getViewer().getView().setFieldOfView(Math.toRadians(90.0));

                OrbitBehavior orbit = new OrbitBehavior(c, OrbitBehavior.REVERSE_ROTATE);
                orbit.setSchedulingBounds(new BoundingSphere());
                u.getViewingPlatform().setViewPlatformBehavior(orbit);

        }

        public static void main(String[] args)
        {

                System.out.println("Program Started");
                System.setProperty("sun.awt.noerasebackground", "true");
                TestForSphere bb = new TestForSphere();
                bb.addKeyListener(bb);
                MainFrame mf = new MainFrame(bb, 1056, 1056);

        }

        @Override
        public void actionPerformed(ActionEvent e)
        {
        }

        @Override
        public void keyTyped(KeyEvent e)
        {
        }

        @Override
        public void keyPressed(KeyEvent e)
        {
        }

        @Override
        public void keyReleased(KeyEvent e)
        {
        }
}