Wsrtjtyk

I am getting the error The name mainCamera' does not exist in the current context for the linetargetPos = (Vector2)mainCamera.main.ScreenToWorldPoint(Input.mousePosition);`. I have search for an answer but cannot find a way to stop this.

using System.Collections;

using System.Collections.Generic;

using UnityEngine;



public class PlayerController : MonoBehaviour {



    float speed = 2f;

    Vector2 targetPos;



    private Rigidbody2D myRigidbody;

    private Animator myAnim;



    private static bool playerExists;

    public GameObject cameraPrefab;



    private void Start()

    {

        myRigidbody = GetComponent<Rigidbody2D>();

        myAnim = GetComponent<Animator>();



        if(!playerExists){

            playerExists = true;

            DontDestroyOnLoad(transform.gameObject);

        } else {

            Destroy(gameObject);

        }



        targetPos = transform.position;



        GameObject mainCamera = (GameObject)Instantiate(cameraPrefab);

    }



    void Update()

    {

        if (Input.GetMouseButtonDown(0))

        {



            targetPos = (Vector2)mainCamera.main.ScreenToWorldPoint(Input.mousePosition);

        }

        if ((Vector2)transform.position != targetPos)

        {

            Move();

        } else {

            myAnim.SetBool("PlayerMoving", false);

        }

    }

You're getting that particular error because mainCamera is a local variable defined in Start. It is out of scope where you try to reference it in Update. You probably meant to define it as a field in your class, so you could reference it with mainCamera anywhere in your class. To do that you should do this instead:

// ...



private Rigidbody2D myRigidbody;

private Animator myAnim;



private static bool playerExists;

public GameObject cameraPrefab; 

public GameObject mainCamera; // add this line



private void Start()

{

    myRigidbody = GetComponent<Rigidbody2D>();

    myAnim = GetComponent<Animator>();



    if(!playerExists){

        playerExists = true;

        DontDestroyOnLoad(transform.gameObject);

    } else {

        Destroy(gameObject);

    }



    targetPos = transform.position;



    mainCamera = (GameObject)Instantiate(cameraPrefab); // use mainCamera field

    mainCamera.tag = "MainCamera"; // tell Unity that it is your main camera.

}



// ...

But anyway, Camera.main is a static property of the Camera class, so you should access it through the Camera class anyway.

You should use this in Update instead:

targetPos = (Vector2)Camera.main.ScreenToWorldPoint(Input.mousePosition);