MyObject [] b; //define an array of objects
int zoom; //zoom in/out factor
void setup(){
  size(400,400,P3D);
  b = new MyObject[100]; //populate the array
  for(int i=0; i<b.length; i++)
    b[i] = new MyObject(); //construct objects
}
void draw(){
  background(200); //redraw the background
  camera(xd,yd,getWheel(), b[55].x,b[55].y,b[55].z, 0,0,1);
  int k=0; //object counter
  for(int x=0; x<10; x++) //10x10 grid
    for(int y=0; y<10; y++){
      b[k].draw3(); //draw the object
      b[k].move3(x*60,y*60,0); //move on a grid configuration
      k++; //increment the counter
    }
}
float xd,yd; // difference between current and previous mouse
void mouseDragged(){
  xd += mouseX-pmouseX; //get the difference
  yd += mouseY-pmouseY;
  camera(xd,yd,100+(zoom*5), b[55].x,b[55].y,b[55].z, 0,0,1);
}
void mousePressed(){
  for(int i=0; i<b.length; i++)
    b[i].pick(mouseX,mouseY); //pick an object
}
int getWheel(){
  addMouseWheelListener(new MouseWheelListener() {
    public void mouseWheelMoved(MouseWheelEvent e){
      zoom+=e.getWheelRotation();
    }
  }
  );
  return(zoom);
}