untiy 2022
window-PackageManager-AINavigation 安装 Install

2.创建一个空物体命名Nav，在其自身挂载 NavMeshSurface
然后点击bake 烘焙地形即可

3.创建palyer和怪物
怪物AI代码

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

public class MonsterAI : MonoBehaviour
{
    
    
    public Transform player;
    private NavMeshAgent agent;
    private void Start()
    {
    
    
        agent = GetComponent<NavMeshAgent>();   

    }
    private void Update()
    {
    
    
        if (agent != null) {
    
    
        agent.destination=player.position;
        }
    }
    private void OnDrawGizmos()
    {
    
    
        if (player != null) {
    
    
            Gizmos.DrawLine(transform.position,player.position);        
        }
    }
}