void Update () {
        var controller = OVRInput.GetActiveController() & (OVRInput.Controller.LTrackedRemote | OVRInput.Controller.RTrackedRemote);
        #if UNITY_EDITOR
            controller = OVRInput.GetActiveController() & OVRInput.Controller.RTouch;
        #endif

        if (controller != OVRInput.Controller.None)
        {
            var rotation = OVRInput.GetLocalControllerRotation(controller);

            FlightStickSimulation.CalculateYawPitchRoll(rotation, out yaw, out pitch, out roll);
        }
        if(deltay > 10.0f){
            deltay = 10.0f;
        }
        transform.Rotate(pitch*3.0f, 0, -roll*3.0f, Space.Self);
        transform.Rotate(0, deltay, 0, Space.World);
        deltay += roll*0.1f;
        transform.position += transform.forward*Time.deltaTime*speed;
        speed -= transform.forward.y*1.0f;
        if (speed < 10.0f){
            speed = 10.0f;
        }
        if (speed >30.0f){
            speed = 30.0f;
        }