Collision problem.

Why there is collision when the objects are 10000 meters one from another?


package com.daltonfilho.tutorials.java3d;
import java.applet.Applet;
import java.awt.BorderLayout;
import java.awt.GraphicsConfiguration;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.io.FileNotFoundException;
import java.util.Enumeration;

import javax.media.j3d.AmbientLight;
import javax.media.j3d.Appearance;
import javax.media.j3d.Background;
import javax.media.j3d.Behavior;
import javax.media.j3d.BoundingSphere;
import javax.media.j3d.Bounds;
import javax.media.j3d.BranchGroup;
import javax.media.j3d.Canvas3D;
import javax.media.j3d.DirectionalLight;
import javax.media.j3d.ImageComponent2D;
import javax.media.j3d.Shape3D;
import javax.media.j3d.Texture;
import javax.media.j3d.Texture2D;
import javax.media.j3d.TextureAttributes;
import javax.media.j3d.Transform3D;
import javax.media.j3d.TransformGroup;
import javax.media.j3d.View;
import javax.media.j3d.WakeupCriterion;
import javax.media.j3d.WakeupOnCollisionEntry;
import javax.media.j3d.WakeupOnCollisionExit;
import javax.media.j3d.WakeupOnCollisionMovement;
import javax.media.j3d.WakeupOnElapsedTime;
import javax.media.j3d.WakeupOr;
import javax.vecmath.Color3f;
import javax.vecmath.Point3d;
import javax.vecmath.Vector3d;
import javax.vecmath.Vector3f;

import com.sun.j3d.loaders.Scene;
import com.sun.j3d.loaders.objectfile.ObjectFile;
import com.sun.j3d.utils.applet.MainFrame;
import com.sun.j3d.utils.behaviors.mouse.MouseRotate;
import com.sun.j3d.utils.geometry.Primitive;
import com.sun.j3d.utils.geometry.Sphere;
import com.sun.j3d.utils.image.TextureLoader;
import com.sun.j3d.utils.universe.ConfiguredUniverse;
import com.sun.j3d.utils.universe.SimpleUniverse;

class sss
{
        public void aa()
        {}
        }

public class themain extends Applet implements KeyListener {
        public static void main(String[] args)
        {
                themain aa=  new themain();
                new MainFrame(aa,400,400);
                aa.addKeyListener(aa);
        }
        class colision extends Behavior
        {
               
                WakeupCriterion yawn ;
                WakeupCriterion[]
                kolizia =new WakeupCriterion[3];
                 protected WakeupOr oredCriteria;
       Shape3D shape;
                public colision(Shape3D shape,Bounds granici){
                this.shape=shape;
                        System.out.println("bbbaaa");
                        setSchedulingBounds(granici);
                }
                public void initialize() {
                    kolizia[0]=new WakeupOnCollisionEntry(shape);
                kolizia[1] = new WakeupOnCollisionExit(shape);
                kolizia[2] = new WakeupOnCollisionMovement(shape);
                oredCriteria = new WakeupOr(kolizia);
                wakeupOn(oredCriteria);
               
                }
                public  void processStimulus(Enumeration criteria) {
                          WakeupCriterion theCriterion = (WakeupCriterion) criteria.nextElement();
                            if (theCriterion instanceof WakeupOnCollisionEntry) {
                         themain.this.update(true);
                              System.out.println("Collided with ");
                            } else if (theCriterion instanceof WakeupOnCollisionExit) {
                             themain.this.update(true);
                              System.out.println("Stopped colliding with  "
                                );
                            } else {
                             themain.this.update(true);
                              System.out.println("Moved whilst colliding with "
                            );
                            }
                            wakeupOn(oredCriteria);

                       
                }
                }
       
        class main extends Behavior
        {
                WakeupCriterion yawn ;

                public main(){
       
                        System.out.println("bbb");
                        yawn  = new WakeupOnElapsedTime(30);

                }
                public void initialize() {

                        wakeupOn(yawn);
                }
                public  void processStimulus(Enumeration criteria) {
       
                themain.this.update(false);
                        wakeupOn(yawn);
                       
                }
                }
       

        float posokaz = 0.0f;
        float posokay=0.0f;
        float posokax=5.0f;
        float posoka2z = 10.0f;
        float posoka2y=0.0f;
        float posoka2x=0.0f;
    double zawurtane = 0;
         Transform3D transform;
         Vector3f mqsto;
         Transform3D transform2;
         Transform3D transform3;
         Vector3f mqstomishena;
         View gledka;
         TransformGroup view;
         TransformGroup tg;
         TransformGroup tg2;
          DirectionalLight light1;
          Shape3D korab;
          Background background =null;
          //Shape3D mishena;
          Shape3D truba;
          Transform3D lookat ;
          ConfiguredUniverse ss;
          ConfiguredUniverse universe ;
           ObjectFile f;
           Scene s = null;
           BranchGroup b ;
public themain ()
{
        //javax.media.j3d.View.setFrontClipDistance(22);
       

        setLayout(new BorderLayout());
         GraphicsConfiguration config = SimpleUniverse.getPreferredConfiguration();
         
         Canvas3D canvas = new Canvas3D(config);
        // canvas.setBounds(10000, 10000, 10000, 10000);
         universe = new ConfiguredUniverse(canvas);
 
  tg = new TransformGroup();
  tg2 =new TransformGroup();

  tg2.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
  tg.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
  transform = new Transform3D();
  transform2 = new Transform3D();
  transform3 = new Transform3D();
  lookat= new Transform3D();
  View view = canvas.getView();
  view.setBackClipDistance(3000f);
   mqsto =new Vector3f(posokax,posokay,posokaz);
   mqstomishena =new Vector3f(0,0,0);
  // mqstomishena =new Vector3f(20,0,0);
   add( canvas);
   canvas.addKeyListener(this);
   transform.setTranslation(mqsto);
   background=new Background();
   TextureAttributes texAttr = new TextureAttributes();
   texAttr.setTextureMode(TextureAttributes.MODULATE);
   //background.setColor(1.0f, 0.0f, 0.0f);
   background.setCapability(Background.ALLOW_APPLICATION_BOUNDS_WRITE);
   gledka=new View();
   lookat.lookAt(new Point3d(0,0,0), new Point3d(mqsto.getX(),mqsto.getY(),mqsto.getZ()), new Vector3d() );
   lookat.setTranslation(mqsto);
   transform2.setTranslation(mqstomishena);
   transform3.setTranslation(new Vector3f(0,0,0));
   tg.setTransform(transform);
   gledka.setBackClipDistance(3);
   gledka.setFrontClipDistance(30000);
//   gledka.addCanvas3D(canvas);
   tg2.setTransform(transform);
   String s1 = "mishena.obj";
   String s2 = "mishena.obj";
   String s3 = "truba.obj";

TextureLoader loader = new TextureLoader("rujda.jpg",this);
ImageComponent2D brick2 = loader.getImage();

Texture2D brick= new Texture2D(Texture2D.BASE_LEVEL, Texture2D.RGB, brick2.getWidth(), brick2.getHeight());
brick.setEnable(true);
brick.setImage(0, brick2);
TextureAttributes ta = new TextureAttributes();    

   BranchGroup group = new BranchGroup();
   korab=loader(s1);
   b.removeChild(0);
  // mishena = loader(s2);
 ////  b.removeChild(0);
   truba=loader(s3);
   b.removeChild(0);
   Color3f light1Color = new Color3f(0f, 255f, 1f);
   BoundingSphere bounds = new BoundingSphere(new Point3d(0.0, 0.0,
                      0.0), 0.0);
   bounds.setRadius(Float.MAX_VALUE);
   Vector3f light1Direction = new Vector3f(4.0f, -7.0f, -12.0f);
    light1 = new DirectionalLight(light1Color, light1Direction);
   light1.setInfluencingBounds(bounds);
   background.setApplicationBounds(bounds);
   background.setName("rujda.jpg");
   
   AmbientLight ambientLightNode = new AmbientLight (light1Color);
        ambientLightNode.setInfluencingBounds (bounds);
   Appearance ap = new Appearance();
    Color3f col = new Color3f(0.0f, 0.0f, 22.0f);
   ap.setTextureAttributes(texAttr);
   ap.setTexture(brick);
 //  mishena.setAppearance(ap);
   truba.setAppearance(ap);
 
   korab.setAppearance(ap);
//  tg.addChild(mishena);
   tg.addChild(truba);
   tg2.addChild(korab);
   Sphere mySphere = new Sphere(0.7f,Primitive.GENERATE_TEXTURE_COORDS,ap);
tg2.addChild(mySphere);
   //tg.addChild(view);
   tg.addChild(ambientLightNode);
   MouseRotate myMouseRotate = new MouseRotate();
   myMouseRotate.setTransformGroup(tg);
   myMouseRotate.setSchedulingBounds(new BoundingSphere());
    group.addChild(tg);
   group.addChild(background);
    group.addChild(tg2);
 
    group.addChild(light1);
    main loop = new main();
    colision colisions = new colision(korab,bounds);
    colision colisions2 = new colision(truba,bounds);
    loop.setSchedulingBounds(bounds);
    colisions.setSchedulingBounds(bounds);
    group.addChild(loop);
    group.addChild(colisions);
    group.addChild(colisions2);
 
   
  universe.getViewingPlatform().setNominalViewingTransform();
 universe.getViewingPlatform().getViewPlatformTransform().setTransform(transform);
   universe.addBranchGraph(group);
   this.setVisible(true);
}
public static Texture getTexture(String path)
{
       TextureLoader texLoader = new TextureLoader(path, null);
       Texture texture =  texLoader.getTexture();
       if (texture == null)
         System.out.println("Cannot load texture from " + path);
       else {
         System.out.println("Loaded texture from " + path);
       //  texture.setEnable(true);
       }
       return texture;
}
public void keyPressed(KeyEvent e){
        if(e.getKeyCode()==KeyEvent.VK_NUMPAD2)
        {
                System.out.println("aa");
         
posokax=posokax+10.f;
mqsto.setX(posokax);
transform.setTranslation(mqsto);
tg.setTransform(transform);
        }
        if(e.getKeyCode()==KeyEvent.VK_A)
        {
                System.out.println("aa");
         
zawurtane=zawurtane+0.01;
transform2.rotZ(zawurtane);
tg2.setTransform(transform2);
        }
        if(e.getKeyCode()==KeyEvent.VK_D)
        {

zawurtane=zawurtane-0.01;
transform2.rotZ(zawurtane);
tg2.setTransform(transform2);
        }
        if(e.getKeyCode()==KeyEvent.VK_NUMPAD2)
        {
                System.out.println("aa");
         
posokax=posokax+10.f;
mqsto.setX(posokax);
transform.setTranslation(mqsto);
tg.setTransform(transform);
        }
       
        if(e.getKeyCode()==KeyEvent.VK_NUMPAD8)
        {
                System.out.println("aa");
posokax=posokax-10.f;
mqsto.setX(posokax);
transform.setTranslation(mqsto);
tg.setTransform(transform);
        }
        if(e.getKeyCode()==KeyEvent.VK_NUMPAD4)
        {
                System.out.println("aa");
posokay=posokay+10.f;
mqsto.setY(posokay);
transform.setTranslation(mqsto);
tg.setTransform(transform);
zawurtane=zawurtane+0.05;
transform.rotZ(zawurtane);
tg.setTransform(transform);
        }
        if(e.getKeyCode()==KeyEvent.VK_NUMPAD6)
        {
                System.out.println("aa");
posokay=posokay-10.f;
mqsto.setY(posokay);
transform.setTranslation(mqsto);
tg.setTransform(transform);
zawurtane=zawurtane-0.05;
transform.rotZ(zawurtane);
tg.setTransform(transform);
        }

        }
public void keyReleased(KeyEvent e){

         }
public void keyTyped(KeyEvent e){

         }

public Shape3D loader(String s1)
{
          f = new ObjectFile ();
           try{
                        s = f.load (s1);
                   }
                   catch(FileNotFoundException e)
                   {
                           System.out.println(e);
                   }
       b = s.getSceneGroup();
           return (Shape3D) b.getChild(0);
}
public  void update(boolean kol)
{
        if (kol==true)
        {
                transform.setTranslation(new Vector3f(0,0,0));
                tg.setTransform(transform);
                posokaz=0f;
                System.out.println("bbbbb");
        }
        else{
        posokaz=posokaz+100f;
       
transform.rotY(0);
transform.setTranslation(new Vector3f(posokay,posokax,posokaz));
tg.setTransform(transform);
        }
transform2.setTranslation(new Vector3f(posoka2y,posoka2x,10000));
tg2.setTransform(transform2);
transform3.setTranslation(new Vector3f(posoka2y,posoka2x+200,10500));
//lookat.lookAt(new Point3d(0,0,0), new Point3d(mqsto.getX(),mqsto.getY(),mqsto.getZ()), new Vector3d() );
universe.getViewingPlatform().getViewPlatformTransform().setTransform(transform3);

}

        }

Hi

Please could you use variable names in English? I hardly understand Estonian or Polish. Are you sure you correctly set their bounding volumes?

how to set the volumes?

By default, a Shape3D is pickable and collidable, it automatically computes its bounding volume. If it does not work, you can use setBoundsAutoCompute(false) and setCollisionBounds().

I advise you to read this tutorial about collisions and Java3D:
http://ex.osaka-kyoiku.ac.jp/~fujii/JREC6/onlinebook_selman/Htmls/3DJava_Ch05.htm

Ok but how to set the bounds from a obj file?I have no idea.

setCollisionBounds is a method of the class Shape3D. I try to help you but you should really look at the examples I gave you and in the documentation.

I do but there the use cubes and spheres and my object is torus.I whant to set the collision bounds in the shape of the object how to do this?

Your method called loader() already returns a Shape3D, what's wrong then? What is missing?

The collision bounds are in the shape of box ,not in the shape of the object.

Yes, that's not a problem. A bounding volume is used to avoid heavy computations when it is easy and fast to determine that there is no collision, a more simple volume (a box, a sphere) is cheaper to use and it doesn't prevent you from using more accurate collision tests later. A modeler can give you an approximate bounding box and you can use it in your code or you can compute it.

Yes  when I try to go through the center of the torus it collide.

Then, is your problem solved?

No I want to pass through the torus.But to collide if i hit the torus

I see what you mean but I don't know how to achieve that with a single Shape3D.

then what do you suggest?

The library Jiglib is able to do that, maybe you could study its source code and adapt it for your needs.

Edit.: Maybe use the parametric equation of the torus:
http://www.joachim-reichel.de/publications/silvia-sm02.pdf

But I dont want a new engine.

What you are trying to do goes beyond the abilities of Java3D, you have to use a physics engine with it or to use parametric equations in your own code.