Как сделать поворот камеры для андроид?

public class AndroidHelp : MonoBehaviour
{
    private float rotX = 0f;
    private float rotY = 0f;
    private Vector3 origRot;
    private float dir1=-1;
     public Transform camTransform;
     private Touch initTouch;
     public Transform lookAt;
     private Vector3 dir ;
 private Quaternion rotation;
    public float rotSpeed = 0.5f;
     public float speed;
    // Start is called before the first frame update
    void Start()
    {
          camTransform = transform;
    }
 
    // Update is called once per frame
    void Update()
    {
        
         rotation = Quaternion.Euler(0,   rotY  *speed, 0);
        dir =  new Vector3(0,0,-3) ;
         camTransform.position = lookAt.position  + rotation * dir;
          camTransform.LookAt(lookAt.position);
       foreach (Touch touch in Input.touches)
        {
              float deltaX = initTouch.position.x - touch.position.x;
        rotY += deltaX * Time.deltaTime * rotSpeed * dir1;
            if (touch.phase == TouchPhase.Began&&!EventSystem.current.IsPointerOverGameObject())
            {
                initTouch = touch;
            }
           
            else if (touch.phase == TouchPhase.Ended&&!EventSystem.current.IsPointerOverGameObject())
            {
                initTouch = new Touch();
            }
        }
    
 
    }
}