【转】 Unity3D 野怪AI（巡逻，追击，攻击）以及Hero的移动及旋转

 

原文地址：http://bbs.9ria.com/thread-179173-1-1.html

野怪AI

[hide]using UnityEngine;
using System.Collections;

public class NewMonsterAI : MonoBehaviour {

    public const int AI_Null = 10;
    public const int AI_Idle = 0;
    public const int AI_Patrol =1;
    public const int AI_Pursuit =2;
    public const int AI_Attack = 3;
    public const int AI_Attack_Idle = 4;
    public const int AIA_BackPoint = 5;

    public const float followUpDistance = 3.0f;
    public const float attackDistance = 2.0f;

    public const float vAttackDeltaTime = 1.0f;

    public const float maxFollow = 20.0f;
    public const float speed = 2.0f;
    public const float runSpeed = 3.0f;
    public const float vEscapeSpeed = 6.0f;

    public Rect vRect = new Rect(0,0,10,10);

    public Vector2 Dis;
    public Vector2 srcPoint;//出生坐标

    public GameObject player;
    public int vStartState;
    public int vLostState;
        // Use this for initialization
        void Start () {
        vStartState = AI_Idle;
        vLostState = AI_Null;
        srcPoint = new Vector2(transform.position.x,transform.position.z);
        player = GameObject.Find("Viking");
        }
        
        // Update is called once per frame
        void Update () {
        switch (vStartState)
        { 
            case AI_Idle:
                if (vStartState != vLostState)
                {
                    animation.CrossFade("Idle");
                    vLostState = vStartState;
                    Debug.Log("1");
                }
                fGetPatrolPosition();
                vStartState = AI_Patrol;
                break;
            case AI_Patrol:
                if (vStartState != vLostState)
                {
                    animation.CrossFade("Walk");
                    vLostState = vStartState;
                    Debug.Log("2");
                }
                fPatrovRect();
                if(Vector2.Distance(Dis,new Vector2(transform.position.x,transform.position.z))<0.4f)
                {
                    //Debug.Log("没进来？");
                   
                    vStartState = AI_Idle;
                }
                if (Vector3.Distance(transform.position, player.transform.position) < followUpDistance)
                {
                    vStartState = AI_Pursuit;
                }
                
                break;
            case AI_Pursuit:
                if (vStartState != vLostState)
                {
                    animation.CrossFade("Run");
                    vLostState = vStartState;
                    Debug.Log("3");
                }
                fPursuitHero();
                if (Vector3.Distance(new Vector3(srcPoint.x, transform.position.y, srcPoint.y), transform.position) > maxFollow && Vector3.Distance(transform.position, player.transform.position) > followUpDistance)
                {
                    vStartState = AIA_BackPoint;
                }
                if (Vector3.Distance(transform.position, player.transform.position) < attackDistance)
                {
                    vStartState = AI_Attack;
                }
                break;
            case AI_Attack:
                if (vStartState != vLostState)
                {
                    vLostState = vStartState;
                    Debug.Log("4");
                }
                fAttackHero();
                if (Time.time - backUptime >= 0.2f)
                {
                    backUptime = Time.time;
                    vStartState = AI_Attack_Idle;
                }
                break;
            case AI_Attack_Idle:
                if (vStartState != vLostState)
                {
                    animation.CrossFade("Idle");
                    vLostState = vStartState;
                }
                vStartState = AI_Pursuit;
                break;
            case AIA_BackPoint:
                if (vStartState != vLostState)
                {
                    animation.CrossFade("Run");
                    vLostState = vStartState;
                }
                fBackPoint();
                if (Vector2.Distance(srcPoint,new Vector2( transform.position.x, transform.position.z) )< 1)
                {
                    vStartState = AI_Idle;
                }                
                break;
        }
        
        }

    private void fBackPoint()
    {
        transform.LookAt(new Vector3(srcPoint.x, transform.position.y, srcPoint.y));
        transform.Translate(Vector3.forward*vEscapeSpeed*Time.deltaTime);
    }
    public float backUptime;
    private void fAttackHero()
    {
        //Debug.Log("我攻击到你了！！！");
    }

    private void fPursuitHero()
    {
        transform.LookAt(player.transform.position);
        transform.Translate(Vector3.forward * runSpeed * Time.deltaTime);
        //transform.Translate(Vector3.forward * vEscapeSpeed * Time.deltaTime);
    }

    private void fPatrovRect()
    {
        transform.LookAt(new Vector3(Dis.x,transform.position.y,Dis.y));
        transform.Translate(Vector3.forward * speed * Time.deltaTime);
    }

    private void fGetPatrolPosition()
    {
        Vector2 vCur;
        do
        {
            float minX = srcPoint.x - vRect.width / 2;
            float minY = srcPoint.y - vRect.height / 2;
            float maxX = srcPoint.x + vRect.width / 2;
            float maxY = srcPoint.y + vRect.height / 2;
            float disX = Random.Range(minX, maxX);
            float disY = Random.Range(minY, maxY);
            Dis = new Vector2(disX, disY);
            vCur = new Vector2(transform.position.x,transform.position.z);
        }
        while (Vector2.Distance(Dis,vCur) < 5);
    }
}[/hide]