3D Solar System problems

Question

hi,
I'm trying to simulate a solar system and I have those two problems
- I can't add a sattelite to a planet (the moon to the earth)
- I can't make a planet turn on itself (only the central one: the sun)
Here is my source. Thanks for helping.
Sorry for the comments in french.
You can send your answers to [email protected]
class Espace
*     Auteur : Leli�vre Antoine                                   *
*     Fichier : Espace.java                                   *
*     Fonction: Reconstitution de notre systeme solaire *
*     Date: 09/02/04                                             *
import com.sun.j3d.utils.universe.SimpleUniverse;
import javax.media.j3d.BranchGroup;
import javax.media.j3d.Transform3D;
import javax.vecmath.Vector3f;
import javax.media.j3d.TransformGroup;
import javax.media.j3d.Canvas3D;
//import javax.media.j3d.Alpha;
//import javax.media.j3d.RotationInterpolator;
import javax.media.j3d.BoundingSphere;
import javax.vecmath.Point3d;
import javax.media.j3d.Background;
import com.sun.j3d.utils.image.TextureLoader;
//import javax.media.j3d.Texture2D;
import javax.media.j3d.ImageComponent2D;
import javax.swing.JFrame;
public class Espace extends JFrame
     public Espace()
          super("Systeme Solaire...");
          // creation du canvas
          Canvas3D canvas = new Canvas3D(SimpleUniverse.getPreferredConfiguration());
          getContentPane().add("Center",canvas);
          // cr�ation de la sc�ne, regroupement des objets
          BranchGroup scene = createScene();
          scene.compile();
          // cr�ation de l'univers de la scene 3D
          SimpleUniverse univers = new SimpleUniverse(canvas);
          // on met le plan de projection en arriere par rapport � l'origine
          univers.getViewingPlatform().setNominalViewingTransform();
          // on place la sc�ne dans l'univers "univers"
          univers.addBranchGraph(scene);
          //arret du programme lors du clic sur la croix
          setDefaultCloseOperation(EXIT_ON_CLOSE);
     * creation d'un groupement d'objet *
     public BranchGroup createScene()
          // creation du BG principal
          BranchGroup ObjPrinc = new BranchGroup();
          BranchGroup terre = new BranchGroup();
          BranchGroup mars = new BranchGroup();
          BranchGroup saturne = new BranchGroup();
          BranchGroup jupiter = new BranchGroup();
          BranchGroup venus = new BranchGroup();
          BranchGroup mercure = new BranchGroup();
          BranchGroup lune = new BranchGroup();
          BranchGroup uranus = new BranchGroup();
          BranchGroup neptune = new BranchGroup();
          BranchGroup pluton = new BranchGroup();
          TextureLoader loader=new TextureLoader("fond.jpg",this);
          ImageComponent2D image=loader.getImage();
          Background bg=new Background(image);
          bg.setApplicationBounds(new BoundingSphere(new Point3d(0,0,0),150d));
          ObjPrinc.addChild(bg);
          Animation MonAnimation = new Animation();
          //------ Debut Objet Lune-------
          //Planete Lune = new Planete();
          //Transform3D Translation1 = new Transform3D();
          //Translation1.set(new Vector3f(0.05f, 0.0f, 0.0f));
          //TransformGroup TranslateGP1 = new TransformGroup(Translation1);
          //TranslateGP1.addChild(Lune.AjoutPlanete("lune.jpg",0.01f));
          //lune.addChild(TranslateGP1);
          //------ Fin Objet Lune -----
          //------ Debut Objet Terre -------
          Planete Terre = new Planete();
          Planete Lune = new Planete();
          Transform3D Translation = new Transform3D();
          Translation.set(new Vector3f(0.4f, 0.0f, 0.0f));
          TransformGroup TranslateGP = new TransformGroup(Translation);
          TranslateGP.addChild(Terre.AjoutPlanete("earth.jpg",0.03f));
          terre.addChild(TranslateGP);
          //------ Fin Objet Terre -----
          //------ Debut Objet Saturne -------
          Planete Saturne = new Planete();
          Transform3D Translation2 = new Transform3D();
          Translation2.set(new Vector3f(0.9f, 0.0f, 0.2f));
          TransformGroup TranslateGP2 = new TransformGroup(Translation2);
          TranslateGP2.addChild(Saturne.AjoutPlanete("saturne.jpg",0.08f));
          saturne.addChild(TranslateGP2);
          //------ Fin Objet Saturne-----
          //------ Debut Objet Mars -------
          Planete Mars = new Planete();
          Transform3D Translation3 = new Transform3D();
          Translation3.set(new Vector3f(0.5f, 0.0f, 0.0f));
          TransformGroup TranslateGP3 = new TransformGroup(Translation3);
          TranslateGP3.addChild(Mars.AjoutPlanete("mars.jpg",0.02f));
          mars.addChild(TranslateGP3);
          //------ Fin Objet Mars -----
          //------ Debut Objet Jupiter-------
          Planete Jupiter = new Planete();
          Transform3D Translation4 = new Transform3D();
          Translation4.set(new Vector3f(0.7f, 0.0f, 0.0f));
          TransformGroup TranslateGP4 = new TransformGroup(Translation4);
          TranslateGP4.addChild(Jupiter.AjoutPlanete("jupiter.jpg",0.1f));
          jupiter.addChild(TranslateGP4);
          //------ Fin Objet Jupiter -----
          //------ Debut Objet Venus-------
          Planete Venus = new Planete();
          Transform3D Translation5 = new Transform3D();
          Translation5.set(new Vector3f(0.3f, 0.0f, 0.0f));
          TransformGroup TranslateGP5 = new TransformGroup(Translation5);
          TranslateGP5.addChild(Venus.AjoutPlanete("venus.jpg",0.03f));
          venus.addChild(TranslateGP5);
          //------ Fin Objet Venus -----
          //------ Debut Objet Mercure-------
          Planete Mercure = new Planete();
          Transform3D Translation6 = new Transform3D();
          Translation6.set(new Vector3f(0.2f, 0.0f, 0.0f));
          TransformGroup TranslateGP6 = new TransformGroup(Translation6);
          TranslateGP6.addChild(Mercure.AjoutPlanete("mercure.jpg",0.01f));
          mercure.addChild(TranslateGP6);
          //------ Fin Objet Jupiter -----
          //------ Debut Objet Uranus-------
          Planete Uranus = new Planete();
          Transform3D Translation7 = new Transform3D();
          Translation7.set(new Vector3f(1.1f, 0.0f, 0.0f));
          TransformGroup TranslateGP7 = new TransformGroup(Translation7);
          TranslateGP7.addChild(Uranus.AjoutPlanete("uranus.jpg",0.05f));
          uranus.addChild(TranslateGP7);
          //------ Fin Objet Uranus -----
          //------ Debut Objet Neptune-------
          Planete Neptune = new Planete();
          Transform3D Translation8 = new Transform3D();
          Translation8.set(new Vector3f(1.45f, 0.0f, 0.0f));
          TransformGroup TranslateGP8 = new TransformGroup(Translation8);
          TranslateGP8.addChild(Uranus.AjoutPlanete("neptune.jpg",0.05f));
          neptune.addChild(TranslateGP8);
          //------ Fin Objet Neptune -----
          //------ Debut Objet Pluton-------
          Planete Pluton = new Planete();
          Transform3D Translation9 = new Transform3D();
          Translation9.set(new Vector3f(1.7f, 0.0f, 0.0f));
          TransformGroup TranslateGP9 = new TransformGroup(Translation9);
          TranslateGP9.addChild(Uranus.AjoutPlanete("mercure.jpg",0.005f));
          pluton.addChild(TranslateGP9);
          //------ Fin Objet Pluton-----
          //----- d�but objet Soleil -----
          Planete Soleil = new Planete();
          ObjPrinc = MonAnimation.Rotation(ObjPrinc,Soleil.AjoutPlanete("soleil.jpg",0.15f),-1,3000);
          //----- fin 2eme objet
          ObjPrinc = MonAnimation.Rotation(ObjPrinc,terre,-1,10000);
          ObjPrinc = MonAnimation.Rotation(ObjPrinc,saturne,-1,294500);
          ObjPrinc = MonAnimation.Rotation(ObjPrinc,mars,-1,18800);
          ObjPrinc = MonAnimation.Rotation(ObjPrinc,jupiter,-1,118600);
          ObjPrinc = MonAnimation.Rotation(ObjPrinc,venus,-1,6100);
          ObjPrinc = MonAnimation.Rotation(ObjPrinc,mercure,-1,2400);
          ObjPrinc = MonAnimation.Rotation(ObjPrinc,uranus,-1,840000);
          ObjPrinc = MonAnimation.Rotation(ObjPrinc,neptune,-1,1640000);
          ObjPrinc = MonAnimation.Rotation(ObjPrinc,pluton,-1,2470000);
          //am�lioration du processus d'affichage
          ObjPrinc.compile();
          return ObjPrinc;
     public static void main(String[] args)
          Espace MonEspace = new Espace();
          MonEspace.setSize(1024,768);
          MonEspace.setVisible(true);
class Animation
*     Auteur : Leli�vre Antoine                                        *
*     Fichier : Animation.java                              *
*     Fonction: Animation de la scene                     *
*     Date     : 14/02/04                                        *
import com.sun.j3d.utils.geometry.Sphere;
import javax.media.j3d.BranchGroup;
//import javax.media.j3d.Transform3D;
import javax.media.j3d.TransformGroup;
import javax.media.j3d.Alpha;
import javax.media.j3d.RotationInterpolator;
import javax.media.j3d.BoundingSphere;
public class Animation
     public Animation()
     public BranchGroup Rotation(BranchGroup GroupeObj,Sphere UnePlanete,int NbTour,long tps)
          TransformGroup TG = new TransformGroup();
          //Donner la possibilit� a l'objet de bouger
          TG.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
          GroupeObj.addChild(TG);
          // Ajout de la sphere � l'objet charger de l'animation
          TG.addChild(UnePlanete);
          // Configuration du nombre de tour et la vitesse
                    // ici tourne ind�finiment (-1) et prend 60 secondes pour faire un tour
          Alpha alpha = new Alpha(NbTour,tps);
          RotationInterpolator Rotation = new RotationInterpolator(alpha, TG);
          Rotation.setSchedulingBounds(new BoundingSphere());
          GroupeObj.addChild(Rotation);
          return GroupeObj;
     public BranchGroup Rotation(BranchGroup GroupeObj,BranchGroup TG1,int NbTour,long tps)
          TransformGroup TG = new TransformGroup();
          //Donner la possibilit� a l'objet de bouger
          TG.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
          GroupeObj.addChild(TG);
          // Ajout de la sphere � l'objet charger de l'animation
          TG.addChild(TG1);
          // Configuration du nombre de tour et la vitesse
                    // ici tourne ind�finiment (-1) et prend 60 secondes pour faire un tour
          Alpha alpha = new Alpha(NbTour,tps);
          RotationInterpolator Rotation = new RotationInterpolator(alpha, TG);
          Rotation.setSchedulingBounds(new BoundingSphere());
          GroupeObj.addChild(Rotation);
          return GroupeObj;
class Planete
*     Auteur : Leli�vre Antoine                                   *
*     Fichier : Planete.java                                   *
*     Fonction: Ajouter une plan�te                         *
*     Date     : 09/02/04                                        *
import com.sun.j3d.utils.geometry.Sphere;
import com.sun.j3d.utils.image.TextureLoader;
import javax.media.j3d.Appearance;
import javax.media.j3d.ColoringAttributes;
//import javax.media.j3d.ImageComponent;
import javax.media.j3d.Texture;
import javax.media.j3d.Texture2D;
import javax.media.j3d.TextureAttributes;
import javax.media.j3d.ImageComponent2D;
import java.awt.Container;
public class Planete
     public Planete()
     * Cr�ation d'une nouvelle planete     *
     *     Param�tre: Nom du fichier image *
     *               Rayon de la plan�te     *
     * Renvoie     : l'objet Sphere           *
     public Sphere AjoutPlanete(String NomImage,float Rayon)
          Appearance AppTexture = AjoutTexture(NomImage);
          Sphere NouvellePlanete = new Sphere(Rayon,Sphere.GENERATE_TEXTURE_COORDS,35,AppTexture);
          return NouvellePlanete;
     *     Ajout du texture sur la sphere     *
     * Param�tre: Nom du fichier image *
     *     Renvoi : L'objet Appearance     *
     private Appearance AjoutTexture(String NomImage)
          try
               Appearance Apparence = new Appearance();
               // chargement d'une image pour texture
               TextureLoader loader = new TextureLoader(NomImage,new Container());
               ImageComponent2D image = loader.getImage();
               // instanciation de l'objet texture
               Texture2D texture = new Texture2D(Texture.BASE_LEVEL,Texture.RGBA,image.getWidth(),image.getHeight());
               texture.setImage(0, image);
               // ajout de la texture � l'apparence
               Apparence.setTexture(texture);
               Apparence.setTextureAttributes(new TextureAttributes());
               return Apparence;
          catch(NullPointerException e1)
               // Creation d'une texture uni dans le cas ou le fichier image n'exciste pas
               Appearance Apparence = new Appearance();
               ColoringAttributes bleu = new ColoringAttributes();
               bleu.setColor(0.0f,0.0f,0.8f);
               Apparence.setColoringAttributes(bleu);
               return Apparence;
}

Answer 1

Couple of suggestions:
1. Get rid of everything else except the earth and moon. You have too much happening at one time to figure out what is wrong.
2. Re-post the new slimmer version of your code using the [code ] [code ] tags (without the space after the word 'code') so I can read it. See http://forum.java.sun.com/features.jsp#Formatting for more help.
3. Don't use .jpg files in your example. I don't have those files so I can't compile your code on my machine.
4. If you are getting any errors, post the entire stack trace.
fitz