transform.Translate(Vector3.forward * Time.deltaTime * force, Space.Self); 朝前
transform.Rotate(0, -25 * Time.deltaTime, 0, Space.Self); 转向
坐标转化后前移 double y = GameObject.Find("playerShip").GetComponent<Transform>().localEulerAngles.y;//获取rotation
GetComponent<Rigidbody>().AddForce( new Vector3(float.Parse(sin(y)), 0, float.Parse(cos(y))) * force * Time.deltaTime);