4 Way Movement Using Joystick Input

Hi All,

I'm trying to write a C# script for character movement that only allows my character to move in 1 of 4 directions at a time (up, down, left, right). The challenge is that I want this to use joystick input instead of keyboard.

I currently have a script which I found on these forums which works perfectly, except for the fact that it allows 8 way (ie. can move diagonally) movement instead of just 4.

Here is the script I'm currently using. Any tips on how I can update it to restrict diagonal movement would be great.

 public class newMove : MonoBehaviour {
 
     private float speed = 1f;
     public Transform playergraphic;
 
     // Update is called once per frame
     void FixedUpdate()
     {
         Movement();
     }
 
     void Movement()
     {
 
         //Player object movement
         float horMovement = Mathf.Round(Input.GetAxis("Horizontal"));
         float vertMovement = Mathf.Round(Input.GetAxisRaw("Vertical"));
 
         transform.Translate(transform.right * horMovement * Time.deltaTime * speed);
         transform.Translate(transform.forward * vertMovement * Time.deltaTime * speed);
 
         //Player graphic rotation
         Vector3 moveDirection = new Vector3(horMovement, 0, vertMovement);
 
         moveDirection.Normalize();
 
         if (moveDirection != Vector3.zero)
         {
             Quaternion newRotation = Quaternion.LookRotation(moveDirection);
             playergraphic.transform.rotation = Quaternion.Slerp(playergraphic.transform.rotation, newRotation, Time.deltaTime * 5);
         }
     }
 }