public Particle(float x, float y, long life, Sprite sprite) {
		this.pos = new Vector(x, y);
		this.xx = x;
		this.yy = y;
		this.birth = System.currentTimeMillis();
		this.life = life + (random.nextInt(1000) - 3);
		
		this.sprite = sprite;
		
		this.xa = random.nextGaussian();
		this.ya = random.nextGaussian();
	}