boid/Main.java

import java.util.Timer;
import java.util.TimerTask;

public class Main implements DrawableCollection {
  private static final int WIDTH = 800;
  private static final int HEIGHT = 600;
  private static final int BOID_COUNT = 10000;
  private static final int CHUNKS_X = 32;
  private static final int CHUNKS_Y = 32;
  private static final int FRAME_STEP = 16;
  private static final float MAX_SPEED = 1;

  private Boid[] boids;
  private Display d;

  public static void main(String[] args) throws InterruptedException {
    ChunkManager.init(WIDTH, HEIGHT, CHUNKS_X, CHUNKS_Y);
    PhysicsObject.width = WIDTH;
    PhysicsObject.height = HEIGHT;
    PhysicsObject.max_speed = MAX_SPEED;
    new Main().run();
  }

  public Main() {
    boids = new Boid[BOID_COUNT];
    for (int i = 0; i < BOID_COUNT; i++) {
      boids[i] = new Boid(WIDTH, HEIGHT, i % 16);
    }

    d = new Display(WIDTH, HEIGHT, this);
  }

  public void run() {
    new Timer().scheduleAtFixedRate(new TimerTask() {
      @Override
      public void run() {
        for (int i = 0; i < BOID_COUNT; i++) {
          boids[i].simulate(i % 16);
        }
        ChunkManager.clear();
        for (Boid b : boids) {
          ChunkManager.register(b);
        }
        d.repaint();
      }
    }, 100, FRAME_STEP);
  }

  @Override
  public Drawable[] get_drawables() {
    return boids;
  }
}