public void Init(int playerNum, Transform gun, float speed, Color color)
{
this.parentNum = playerNum;
this.gunForward = -gun.forward;
this.bulletSpeed = speed;
//Rigidbody rigidbody = Instantiate(this.gameObject.GetComponent<Rigidbody>(), gun.transform.position, gun.transform.rotation) as Rigidbody;
SetColor bulletColor = this.GetComponent <SetColor>();
bulletColor.ColorSet(color);
}