C＃Unity项目中的索引超出范围异常

Question

我正在获取IndexOutOfRangeException：数组索引超出范围。 Grid.updateGrid（）（在Assets / Sripts / Grid.cs：59处） Grid.MPGridCreate（）（在Assets / Sripts / Grid.cs：43处）Grid.Awake（）（在Assets / Sripts / Grid.cs：27处）出现此sript错误，并且不知道为什么在我的统一pacman项目游戏中。 / p>

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

public class Grid : MonoBehaviour {

    public GameObject bottomLeft,topRight;
    public GameObject start,goal;

    Node[,]myGrid;

    public List<Node> path;

    public LayerMask unwalkable;

    int xStart, zStart;

    int xEnd, zEnd;

    int vbells,hbells;

    int bellWidth = 1;
    int bellHeight = 1;

    void Awake()
    {
        MPGridCreate();

    }

    void MPGridCreate()
    {
        xStart = (int)bottomLeft.transform.position.x;
        zStart = (int)bottomLeft.transform.position.z;

        xEnd = (int)topRight.transform.position.x;
        zEnd = (int)topRight.transform.position.z;

        hbells = (int)((xEnd - xStart) / bellWidth);
        vbells = (int)((zEnd - zStart) / bellHeight);

        myGrid = new Node[hbells + 1, vbells];
        updateGrid ();  

    }



    //updategrid

    public void updateGrid()
    {
        for (int i = 0; i <= hbells; i++)
        {
            for (int j = 0; j <= vbells; j++)
            {
                bool walkable = !(Physics.CheckSphere(new Vector3(xStart + i, 0, zStart + j),0.4f, unwalkable));

                myGrid[i,j] = new Node(i, j, 1, walkable);

            }
        }
    }