ArrayList<Unit> enemyList = new ArrayList<Unit>();
ArrayList<Unit> neutralList = new ArrayList<Unit>();
for (int index = 0; index < bulletData.length; index += Bullet.numAttributes) {
int id = bulletData[index];
Bullet bullet = bullets.get(id);
if (bullet == null) {
bullet = new Bullet(id);
bullets.put(id, bullet);
}
bullet.update(bulletData, index);
}
for (int index = 0; index < unitData.length; index += Unit.numAttributes) {
int id = unitData[index];