unity3d WayPoint路点寻路，AI

前言

所需对象

1. 当前玩家
2. 敌人
3. 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 ad float v = Input.GetAxis ("Vertical");//z轴 ws transform.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; /// 
 /// Enemy AI. /// 敌人的AI, /// 1. 3个点之间的巡逻 /// 2. 追击，攻击英雄 ///  public class EnemyAI : MonoBehaviour { public WayPoint _startWayPoint; WayPoint _targetWayPoint; public GameObject _playerPoint; GameObject _targetPoint; void Start(){ _startWayPoint = GameObject.Find ("WayPoint1").GetComponent 
    
      (); _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 (); } } } 
    

总结

1. 这个WayPoint路点寻路AI，其实一开始就一直在检查、获取玩家距离，
2. 如果玩家玩家距离过大，就进行巡逻逻辑
3. 当玩家进入设置的距离范围时，则调用追击、攻击的逻辑