move the object where camera look

i have script move the player with joystic the problem is when i rotate the camera the player not move to y axis when camera facing y

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 
 public class Motor : MonoBehaviour
 {
     
 
 
 
     public float moveSpeed = 5.0f;
     public float drag = 5.0f;
     public float terminalRotationSpeed = 25.0f;
   public VirtualJoystick moveJoystick;
 
 
     private Rigidbody rgb;
    private Transform camTras;
     Vector3 dir;
 
     private void Awake()
     {
        camTras = Camera.main.transform;
     }
     // Use this for initialization
     private void Start()
     {
        
 
 
         rgb = GetComponent<Rigidbody>();
         rgb.maxAngularVelocity = terminalRotationSpeed;
         rgb.drag = drag;
         
     }
 
     // Update is called once per frame
     private void Update()
     {
         dir = Vector3.zero;
         dir.x = Input.GetAxis("Horizontal");
         dir.z = Input.GetAxis("Vertical");
 
         if (dir.magnitude > 1)
             dir.Normalize();
         if (moveJoystick.InputDirection != Vector3.zero)
         {
             dir = moveJoystick.InputDirection;
             // transform.forward = Camera.main.transform.forward;
            
         }
 
         //Rotate direction vector with camera
         Vector3 rotatedDir = camTras.TransformDirection(dir);
         rotatedDir = new Vector3(rotatedDir.x, 0, rotatedDir.z);
         rotatedDir = rotatedDir.normalized * dir.magnitude;
         rgb.AddForce(dir * moveSpeed);
 
     }
 
 }
 

i got suggestion in stack over THIS LINK i can put below code into update but when i put that the player not move anymore help please

 private void Update ()
 {
     Vector3 dir = Vector3.zero;
     dir.x = Input.GetAxis ("Horizontal");
     dir.z = Input.GetAxis ("Vertical");
     if (dir.magnitude > 1)
         dir.Normalize ();
     if (movejoystick.InputDirection != Vector3.zero) {
         dir = movejoystick.InputDirection;
     }
 
     Vector3 rotatedDir = transform.TransformDirection (dir); // world direction of joystick direction
     Vector3 newDir = Vector3.RotateTowards(transform.forward, rotatedDir, Time.deltaTime * 10f, 0.0F); // turn towards joystick direction
     transform.rotation = Quaternion.LookRotation(newDir); // set the new direction
     controller.AddForce (transform.forward * moveSpeed * dir.z); // scale force by joystick up/down
 }