【Unity3D自学记录】游戏开发之怪物AI

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using UnityEngine;using System.Collections;public class BoosAI : MonoBehaviour{    //敌人状态    //敌人站立状态    public const int STATE_STAND = 0;    //敌人行走    public const int STATE_WALK = 1;    //敌人奔跑状态    public const int STATE_RUN = 2;    //记录敌人的当前状态    private int enemyState;    //主角对象    private GameObject hero;    //备份上一次的敌人思考时间    private float backUptime;    //敌人思考下一次行为的时间    public const int AI_THINK_TIME = 2;    //敌人的巡逻范围    public const int AI_ATTACK_DISTANCE = 10;    // Use this for initialization    void Start()    {        //得到主角对象        hero = GameObject.Find("Cube");        //设置敌人的默认状态站立        enemyState = STATE_STAND;    }    // Update is called once per frame    void Update()    {        //判断敌人与主角的距离        if (Vector3.Distance(transform.position, hero.transform.position) <        (AI_ATTACK_DISTANCE))        {            //敌人进入奔跑状态            gameObject.animation.Play("run");            enemyState = STATE_RUN;            //设计敌人面朝主角方向            transform.LookAt(hero.transform);        }        //敌人进入巡逻状态        else        {            //计算敌人的思考时间            if (Time.time - backUptime >= AI_THINK_TIME)            {                //敌人开始思考                backUptime = Time.time;                                //取得0~2之间的随机数                int rand = Random.Range(0,2);                if (rand == 0)                {                    //敌人进入站立状态                    gameObject.animation.Play("idle");                    enemyState = STATE_STAND;                }                       else if (rand == 1)            {                //敌人进入站立状态                //敌人随机旋转角度                Quaternion rotate = Quaternion.Euler(0,Random.Range(1,5) * 90,0);                //1秒内完成敌人旋转                transform.rotation = Quaternion.Slerp(transform.rotation,rotate,Time.deltaTime * 1000);                //播放行走动画                    gameObject.animation.Play("walk");                enemyState = STATE_WALK;            }         }      }        switch (enemyState)        {            case STATE_STAND:                break;            case STATE_WALK:                //敌人行走                transform.Translate(Vector3.forward * Time.deltaTime);                break;            case STATE_RUN:                //敌人朝向主角奔跑                if (Vector3.Distance(transform.position, hero.transform.position) > 3)                {                    transform.Translate(Vector3.forward * Time.deltaTime * 3);                }                break;        }    }}
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