/*A class to describe a group of Particles*/

class FlockSystem {

  ArrayList boids;    //an arraylist for all the particles
  Vector3D origin;        //an origin point for where particles are birthed

  FlockSystem(Vector3D v) {
    boids = new ArrayList();              //initialize the arraylist
    origin = v.copy();                        //store the origin point
  }

  FlockSystem() {
    boids = new ArrayList();              //initialize the arraylist
    origin = new Vector3D(0,0,0);         //store the origin point
    println("flock generated");
  }

  void run() {
    Iterator iter = boids.iterator();

    while(iter.hasNext()) {
      Boid b = (Boid)iter.next();
      b.run(boids);
    }
  }

  void addBoid(Boid b) {
    boids.add(b);
  }
}