these are codes i have written so far...but i wanna be able to use the 3d shuttle image (3ds format) and make it orbit the earth.  I tried to  use the mri3ds library  but was unseccessful.  do you have any idea ?

 

 

 

 

public class Shuttle{
 
 
  // class variables
 
  PImage _img;
  private  float xpos,ypos,zpos;
  private float theta,gamma;
 

 
  // constructor
 
  public Shuttle(float x,float y, float z, PImage i){  

 

 

               i know i should not be using PImage because it doesnt retrieve the image as 3D

 

    
    xpos = x;
    ypos = y;
    zpos = z;
   _img = i;
   
   
  }
 
 
  public void update(){
   
    theta += 0.05;
    gamma += 0.01;
   
    xpos = 80* cos(theta);
    ypos = 80* sin (gamma) * cos(theta);
    zpos = 80* cos(gamma);
  
   
  }
 
  public void draw() {

    
    pushMatrix();
   
  
   
    popMatrix();
   
   
  }
 
}

 

 

 

 

 

the codes below are the main class 

 

 

 

import mri.*;

import shapes3d.*;

//import guicomponents.*;

//import processing.opengl.*;

 

 

 Ellipsoid Earth,sun,mars,stars;
 
 Shuttle shuttle;
 
PImage myshuttle;
 

  
  
   void setup()
   {
    
    
    
     size(1400,1200,P3D);
    
     myshuttle = loadImage ("SpaceShuttleOrbiter.3ds");
    
    
   
    
    // create a new instance of the shuttle class
   
    shuttle = new Shuttle (200,0,-10,myshuttle);
   

    // create sun
    
     sun = new Ellipsoid(this,50,20);
     sun.setTexture("sun.jpg");
     sun.setRadius(100);
     sun.moveTo(new PVector(700,400,-600));
     sun.drawMode(Shape3D.TEXTURE);
    
     // create mars
    
     mars = new Ellipsoid(this,30,30);
     mars.setTexture("mars.jpg");
     mars.setRadius(60);
     mars.moveTo(100,0,1000);
     mars.drawMode(Shape3D.TEXTURE);
    
    
    
     // create Earth
    
     Earth = new Ellipsoid(this,30,30);
     Earth.setTexture("Earthmap.jpg");
     Earth.setRadius(69);
     Earth.moveTo(-300,0,500);
     Earth.drawMode(Shape3D.TEXTURE);
    
     // create stars background
    
     stars = new Ellipsoid(this,10,10);
     stars.setTexture("3dstars.jpg",5,5);
     stars.setRadius(2000);
     stars.drawMode(Shape3D.TEXTURE);
    
     // add child shape to sun
    
     sun.addShape(Earth);
     sun.addShape(mars);
   
   
    
     frameRate(3);
   }
  
  
   void draw()
   {
    
     stars.rotateBy(0,radians(0.3),0);
     Earth.rotateBy(0,radians(1),0);
     sun.rotateBy(0,radians(1),0);
     mars.rotateBy(0,radians(1),0);
    
     background(0);
    
     sun.draw();
     stars.draw();

 

    shuttle.update();
   
   
   
   
   
   
   
   }