【推荐100个unity插件之1】2d使用A*Pathfinding插件实现敌人AI，并自动躲避障碍物

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

public class Enemy : MonoBehaviour
{
    public float startHealth = 100;//开始血量
    public float health;//当前血量
    public bool isDead;//是否死亡

    public float damage = 10;//敌人伤害
    public float hitRate = 1.0f;//攻速

    private float _lastHit;//计时器
    public LayerMask whatToHit;//可以攻击哪个图层
    
    private float hitDistance = 2.0f;//攻击距离

    [Header("ai导航属性")]
    private AIPath aiPath;
    private Transform target; //目标

    private void Start()
    {
        aiPath = GetComponent<AIPath>();
        target = GameObject.FindGameObjectWithTag("Player").transform;
        health = startHealth;
    }

    private void Update()
    {
        if (target == null) return;
        aiPath.destination = target.position;//敌人移动的目标位置
        if (aiPath.reachedDestination)//是否抵达目标位置
        {
            //发起攻击
            if (Time.time > _lastHit + 1 / hitRate)
            {
                Hit();
                _lastHit = Time.time;
            }
        }
    }

    //攻击
    void Hit()
    {
        //怪物朝向
        Vector3 targetDirection = (target.position - transform.position).normalized;
        //射线 aiPath.endReachedDistance表示抵达终点的距离
        RaycastHit2D hit2D = Physics2D.Raycast(transform.position, targetDirection, aiPath.endReachedDistance + hitDistance, whatToHit);
        if (hit2D.collider != null)
        {
            Debug.Log(damage);
            //造成伤害
            PlayerController playerController = hit2D.collider.GetComponent<PlayerController>();
            playerController?.TakeDamage(damage);
        }
    }
}