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Question

Unity一直提示关联脚本无法加载

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

public class Grid : MonoBehaviour
{
    Node[,] gridmap;
    [SerializeField] int width = 25;
    [SerializeField] int length = 25;
    [SerializeField] float cellSize = 1f;
    [SerializeField] LayerMask obstacleLayer;
     
     private void Start() 
    {
        GenerateGrid();
    }
     
     private void GenerateGrid() 
     {
         gridmap = new Node[length, width];
         CheckPassableTerrian();
     }

     private void CheckPassableTerrian() 
     {
         for (int y = 0; y < width; y++)
         {
            for (int x = 0; x < length; x++)
            {
                Vector3 worldPosition = GetWorldPosition(x, y);
                bool passable = Physics.CheckBox(worldPosition, Vector3.one / 2 * cellSize,Quaternion.identity, obstacleLayer);
                gridmap[x, y] = new Node();
                gridmap[x,y].passable = passable;
            }
         }
     }

     private void OnDrawGizmos()
    {
        if (gridmap == null) { return; }
       for (int y = 0; y < width; y++)
       {
         for (int x = 0; x < length; x++) 
         {
            Vector3 pos = GetWorldPosition(x, y);
            Gizmos.color = gridmap[x, y].passable ? Color.white : Color.red;
            Gizmos.DrawCube(pos, Vector3.one / 4);
         }
               
        }
     }

    private Vector3 GetWorldPosition(int x, int y)
  {
    return new Vector3(transform.position.x + (x * cellSize), 0f, transform.position.z +(y * cellSize));
  }   
}  

我一遍又一遍地重新观看视频，寻找我做错了什么，但一无所获。 我一直在努力重复他所做的 2 个小时，并且不想那么快放弃它。 这是特别的视频：https://www.youtube.com/watch?v=eXsSsexoVGc