public static Particle create(
float lifetime, Vector3f position, Vector3f velocity, Vector3f acceleration) {
final Particle result = pool.borrowObject();
result.lifetime = lifetime;
result.position = position;
result.velocity = velocity;
result.acceleration = acceleration;
return result;
}
public static CommandEvent exit() {
final CommandEvent result = pool.borrowObject();
result.key = CommandKey.EXIT;
return result;
}
