code: public void init(ParticleEmitter emitter, float life) {
  		x = 0;
  		this.emitter = emitter;
  		y = 0;
  		velx = 0;
  		vely = 0;
  		size = 10;
  		type = 0;
  		this.originalLife = this.life = life;
  		oriented = false;
  		scaleY = 1.0f;
  	}
docs: Initialise the state of the particle as it's reused
  
  @param emitter
  The emitter controlling this particle
  @param life
  The life the particle should have (in milliseconds)