Unity3D——利用协同程序实现游戏中的AI（自动行走和发现目标）

来源：互联网发布：三国乱世挂机软件编辑：程序博客网时间：2024/05/22 06:49

协同程序：主程序运行时同时开启另外一段逻辑处理，来协同当前的执行；同一时刻只有一个协同程序在运行，并且协同程序会影响到主线程的运行；
开启方法：(方法2可以传递多个参数，并且性能消耗略小)

StartCorourine(string methodName)
StartCorourine(IEnumerator routine)

如下图所示，AI（黑球）沿着5个黄色方块（Cube）所连接的绿色路径（使用Gizmos绘制）行走，当Mage（Hero）接近AI一定范围的时候，AI将会追击Mage，Mage离开范围时，AI继续之前的行走。

布局显示界面

挂载在Cube上的绘制路径的脚本：WayPoint类

using UnityEngine;using System.Collections;public class WayPoint : MonoBehaviour {#regionpublic WayPoint nextWayPoint;#endregionvoid OnDrawGizmosSelected() {Gizmos.color = Color.green;Gizmos.DrawLine(transform.position, nextWayPoint.gameObject.transform.position);}}

挂载在AI上的脚本：

using UnityEngine;using System.Collections;public class AI : MonoBehaviour {#region variable[SerializeField] //保护封装性private float speed = 3f;[SerializeField]private WayPoint targetPoint, startPoint;[SerializeField]private Hero mage;#endregion// Use this for initializationvoid Start () {if (Vector3.Distance(transform.position, startPoint.transform.position) < 1e-2f) {targetPoint = startPoint.nextWayPoint;} else {targetPoint = startPoint;}StartCoroutine(AINavMesh());}IEnumerator AINavMesh() {while(true) {if (Vector3.Distance(transform.position, targetPoint.transform.position) < 1e-2f) {targetPoint = targetPoint.nextWayPoint;yield return new WaitForSeconds(2f);}if (mage != null && Vector3.Distance(transform.position, mage.gameObject.transform.position) <= 6f) {Debug.Log("侦测到敌人，开始追击！！！");yield return StartCoroutine(AIFollowHero());}Vector3 dir = targetPoint.transform.position - transform.position;transform.Translate(dir.normalized * Time.deltaTime * speed);yield return new WaitForEndOfFrame();}}IEnumerator AIFollowHero() {while (true) {if (mage != null && Vector3.Distance(transform.position, mage.gameObject.transform.position) > 6f) {Debug.Log("敌人已走远，放弃攻击！！！");yield break;}Vector3 dir = mage.transform.position - transform.position;transform.Translate(dir.normalized * Time.deltaTime * speed * 0.8f);yield return new WaitForEndOfFrame();}}}

挂载在Mage上的脚本：

using UnityEngine;using System.Collections;//在本实例中起到标记的作用public class Hero : MonoBehaviour {}

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