how to set joystick to follow camera's position?

【Question】 I want the same as the monster hunter this game as the lens does the conversion

The direction of the virtual joystick is also adjusted at the same time

So that the movement of the rocker is determined by the lens to the left of the rocker will move to the left of the moment

https://www.youtube.com/watch?v=wiyWbivo6Xo

this is my problem video:

https://www.youtube.com/watch?v=prTUYlM5_Y4

my joystick compoment:

using UnityEngine; using System.Collections; public class PlayerController : MonoBehaviour {

 [System.Serializable]
 public class AnimatorParameters{
     public string Run;
     public string horizontal;
     public string vertical;
 }
 private Animator target;
 public float speed = 2.5f;
 public AnimatorParameters parameters;
 
 private Vector3 direction ;
 private Coroutine cououtine;
 
 //
 public AudioSource audio;
 public AudioClip foot;
 private Component touch;
 void Awake(){
     target = GameObject.Find ("Yuka").GetComponent<Animator> ();
     touch = GameObject.Find ("Main Camera").GetComponent<Example_Hand>();
 }
 private IEnumerator Move(){
     
     while (true) {
         this.target.transform.position += this.direction * Time.deltaTime * this.speed;
         this.target.transform.forward = this.direction * Time.deltaTime * this.speed;
         yield return null;
         }
         
     }
     
 public void BeginMove(){
     //this.target.SetBool (this.parameters.Run, true);
     this.target.Play ("Run_2");
     this.cououtine = StartCoroutine (this.Move ());
 }
 public void EndMove(){
     touch.GetComponent<Example_Hand>().enabled = true;
     //this.target.SetBool (this.parameters.Run, false);
     this.target.Play("Idle_C");
     StopCoroutine (this.cououtine);
 }
 
 public void UpdateDirection(Vector3 direction){
     touch.GetComponent<Example_Hand> ().enabled = false;
     this.direction.x = direction.x;
     this.direction.z = direction.y;
 }
 

}