[unity] NullReferenceError

unityNullReferenceError

• 유니티에서 Raycast 스크립트 적용 시

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

public class ObjectTouchEvent : MonoBehaviour
{
    // Update is called once per frame
    void Update()
    {
            ClickDetect();
    }

    private void ClickDetect()
    {
        if (Input.GetMouseButtonDown(0))
        {
            Debug.Log("Click ButtonDown(0)");
            RaycastHit hit_info;
            Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition);
            if (Physics.Raycast(ray, out hit_info, Mathf.Infinity))
            {
                Debug.Log("왜 여기는 안들어오는가?");
                Debug.Log(hit_info.collider.gameObject.name);
            }
        }
    }
}

유니티 실행 후

 

• NullReferenceException: Object reference not set to an instance of an object

해결방법

• main Camera에 Tag를 MainCamera로 수정한다.