unity3d WayPoint路点寻路，AI

article/2025/10/13 12:00:06

前言

一个简单的人工智能WayPoint
WayPoint: 游戏中敌人根据几个巡逻点自动巡逻，在巡逻过程中，时刻监听英雄（敌人）和自己距离是否达到追击范围（不巡逻，追击英雄），在追击过程中，监听是否达到攻击范围（不追击，攻击）。

所需对象

当前玩家
敌人
3个巡逻点

每个对象的脚本

脚本类

1.巡逻点，这里给每个巡逻点添加这个类，并拖入这个巡逻点的下一个巡逻点

public class WayPoint : MonoBehaviour {public WayPoint NextWayPoint;
}

2.控制玩家移动脚本

public class PlayerMove : MonoBehaviour {void Update () {float h = Input.GetAxis ("Horizontal"); //x轴 adfloat v = Input.GetAxis ("Vertical");//z轴 wstransform.Translate (h * Time.deltaTime * 2, 0, 0);transform.Translate (0, 0, v * Time.deltaTime * 2);}
}

3.敌人巡逻AI，发现玩家就追击玩家，到一定距离攻击

using UnityEngine;
using System.Collections;
/// <summary>
/// Enemy AI.
/// 敌人的AI,
/// 1. 3个点之间的巡逻
/// 2. 追击，攻击英雄
/// </summary>
public class EnemyAI : MonoBehaviour {public WayPoint _startWayPoint;WayPoint _targetWayPoint;public GameObject _playerPoint;GameObject _targetPoint;void Start(){_startWayPoint = GameObject.Find ("WayPoint1").GetComponent<WayPoint> ();_playerPoint = GameObject.Find ("Player");Vector3 v = _startWayPoint.transform.position;// < 某值，根据实际值计算if (Vector3.Distance (v, transform.position) < 0.5f) {_targetWayPoint = _startWayPoint.NextWayPoint;} else {_targetWayPoint = _startWayPoint;}StartCoroutine (MyAI());}//第一种在Update里，使用主进程来写/*void Update(){//巡逻前提->不用追击英雄Debug.Log("update...");//判断是否到达追击的范围if (Vector3.Distance (transform.position, _playerPoint.transform.position) < 5) {Debug.Log ("发现玩家...");if (Vector3.Distance (transform.position, _playerPoint.transform.position) < 1) {//播放攻击动画Debug.Log ("攻击动画...");} else {//追击Debug.Log ("追击中...");_targetPoint = _playerPoint;transform.LookAt (_targetPoint.transform);transform.Translate (Vector3.forward * Time.deltaTime*2f, Space.Self);}} else {//巡逻Debug.Log ("巡逻中...");Vector3 v = _targetWayPoint.transform.position;if (Vector3.Distance (transform.position, v) < 0.5f) {_targetWayPoint  = _targetWayPoint.NextWayPoint;Debug.Log("巡逻下一个点"+_targetWayPoint.name);}transform.LookAt (_targetWayPoint.transform.position);transform.Translate (Vector3.forward * Time.deltaTime*2f, Space.Self);}}
*///以下使用协程来写//巡逻IEnumerator MyAI(){while (true) {Vector3 v = _playerPoint.transform.position;if (Vector3.Distance (transform.position, v) > 5f) {Debug.Log ("巡逻中...");Vector3 nextP = _targetWayPoint.transform.position;if (Vector3.Distance (transform.position, nextP) < 0.5f) {Debug.Log ("走下一个巡逻点");_targetWayPoint = _targetWayPoint.NextWayPoint;yield return new WaitForSeconds (1);} transform.LookAt (_targetWayPoint.transform);transform.Translate (Vector3.forward * Time.deltaTime, Space.Self);} else {//Debug.Log ("发现玩家");yield return StartCoroutine (MyNewAI ());}yield return new WaitForEndOfFrame ();}}//追击IEnumerator MyNewAI(){while (true) {Vector3 PPos = _playerPoint.transform.position;if (Vector3.Distance (transform.position, PPos) > 5) {Debug.Log ("玩家超出追击范围,继续巡逻...");yield break;} else {if (Vector3.Distance (transform.position, PPos) < 1) {Debug.Log ("攻击中...");} else {Debug.Log ("追击玩家...");_targetPoint = _playerPoint;transform.LookAt (_targetPoint.transform.position);transform.Translate (Vector3.forward * Time.deltaTime, Space.Self);}}yield return new WaitForEndOfFrame ();}}
}