I have 2 scripts one on player :

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class PlayerPositionCorrection : MonoBehaviour
{

    Transform _playerTransform;
    public float _xAxys;
    public float _newXAxys;

    public GameObject _changerPlayerPosition;

    private void Start()
    {
        _playerTransform = GetComponent<Transform>();
    }

    private void OnTriggerEnter(Collider other)
    {
        if (other.tag == "ChangePlayerPosition")
        {
            float _newXAxys = this.GetComponent<ChangePositionOn>()._newPostion;
            
        }
    }

    private void LateUpdate()
    {
        if (transform.position.z != 0)
        {
            transform.position = new Vector3(_xAxys, _playerTransform.position.y, _playerTransform.position.z);
        }
    }

and second on object :

public class ChangePositionOn : MonoBehaviour
{

    public float _newPostion = 5;

    void Start()
    {
        
    }

    // Update is called once per frame
    void Update()
    {
        
    }
}

I using Unity 2022.1.19f1 and C#.

Thank you for your healp, Michal

I would like to have several object in my game and when player will collide with them change location on x axis.

Unfortunately every time i have this error message:

NullReferenceException: Object reference not set to an instance of an object
PlayerPositionCorrection.OnTriggerEnter (UnityEngine.Collider other) (at Assets/Scripts/PlayerPositionCorrection.cs:23)

CodePudding user response：

1. Check if the ChangePositionOn script is attached to the player gameObject.
2. remove the float decalaration in the function because it makes it a local variable
3. replace your function with this instead

private void OnTriggerEnter(Collider other)
        {
            if (other.CompareTag("ChangePlayerPosition"))
            {
                Debug.Log("Check if Collided With : "  other.gameObject.name);
                _newXAxys = this.GetComponent<ChangePositionOn>()._newPostion;
                Debug.Log("New XAxys value : "  _newXAxys );
            }
        }

CodePudding user response：

Make a new script PositionCorrector and Attach it to the Collider GameObject :

using System.Collections;
  using System.Collections.Generic;
  using UnityEngine;
  
  public class PositionCorrector : MonoBehaviour
  {
  //this should be attached to Collider GameObject
  
     //this is the X value you want to change to, each collider can have a different number.
      public float _newXAxys=4;

      private void OnTriggerEnter(Collider other)
      {
          if (other.CompareTag("PlayerTag"))
          {
              //changing the x axys of the player position
              other.transform.position = new Vector3(_newXAxys, other.transform.position.y, other.transform.position.z);
              
          }
      }
  }