第一人称《AI》

using UnityEngine;
using System.Collections;

public class AI : MonoBehaviour {
private CharacterController controller;
    public float speed = 2.0f;

    public float distance = 0.2f;

    private bool isAlive = true;


    // Use this for initialization
    void Start () {
        //获取到敌人的角色控制器
        controller = GetComponent<CharacterController>();
    }

    // Update is called once per frame
    void Update () {
        //当敌人是【活】的时候执行
        if(isAlive)
        {
            //设置敌人要移动时的初始位置
            Vector3 position = new Vector3(0, 0, speed * Time.deltaTime);
            //限制
            position = Vector3.ClampMagnitude(position, speed);
            //转换世界坐标
            position = transform.TransformDirection(position);
            //进行移动
            controller.Move(position);

            //从物体发出一条射线
            Ray ray = new Ray(transform.position, transform.forward);
            RaycastHit hit;
            //射线截断检测
            if (Physics.SphereCast(ray, 1.0f, out hit))
            {
                //判断射线离物体之间的距离，如果小于设定值，触发
                if (hit.distance < distance)
                {
                    //随机数角度
                    float range = Random.Range(-120, 120);
                    //旋转
                    transform.Rotate(0, range, 0);
                    //控制器跟着转
                    controller.SimpleMove(position);
                }
            }
        }
    }

    public void setAlive(bool isAlive)
    {
        this.isAlive = isAlive;
    }

}