WayPoint寻路

WayPoint寻路

寻路在游戏开发中的重要性，不用多说了。

从大型ARPG游戏到小规模体验游戏，都会不同程度的用到寻路功能。

塔防类游戏，战棋类游戏经常用到waypoint(路径)寻路。

下面我们来介绍一下waypoint寻路。

1.Path(路径)的设计。

图中每一个蓝色的Cube表示一个路径点（WayPoint）,由7个waypoint构成path;

       

Path.cs代码如下：

using UnityEngine;

using System.Collections;

public class Path : MonoBehaviour {

    public WayPoint[] wayPoints;

    public ArrayList points;   //存储wayPoints的transform.position属性

    // Use this for initialization

      void Awake()

    {

        //print("path");

        points = new ArrayList();

        for (int i = ; i < wayPoints.Length; i++)

        {

            points.Add(wayPoints[i].transform.position);

        }

    }

    //判断是否有下一个路径点

    public bool HasNextPoint()

    {

        //points实例化过，并且存在N个路径点

        if (points!=null && points.Count>)

        {

            return true;

        }

        return false;

    }

    public Vector3 GetNextPoint()

    {

        if (points!=null && points.Count>)

        {

            Vector3 p=(Vector3)points[];

            points.RemoveAt();

            return p;

        }

        return Vector3.zero;

    }

}

为需要移动的物体或者人物创建WayPointAI

WayPointAI代码如下

using UnityEngine;

using System.Collections;

public class WayPointAI : MonoBehaviour

{

    public Path path;

    private Vector3 pos;

    private float rotateSpeed = 10f;

    private float moveSpeed = 5f;

    // Use this for initialization

    void Start()

    {

        if (path!=null && path.HasNextPoint())

        {

            pos = path.GetNextPoint();

        }

    }

    // Update is called once per frame

    void Update()

    {

        bool reached = MoveToTarget(pos);

        if (reached==true && path!=null && path.HasNextPoint())

        {

            pos = path.GetNextPoint();

        }

    }

    bool MoveToTarget(Vector3 point)

    {

        //只在XZ平面上移动，消除鼠标点击对Y轴的偏移,保持transform.y

        Vector3 pointR = new Vector3(point.x, transform.position.y, point.z);

        //Quaternion插值 物体朝向目标点平缓转向

        Quaternion wantedRot = Quaternion.LookRotation(pointR - transform.position);

        transform.rotation = Quaternion.Lerp(transform.rotation, wantedRot, rotateSpeed * Time.deltaTime);

        //使用插值当物体到达目标点以后，会有抖动现象，在point处消除抖动

        float distance = Vector3.Distance(pointR, transform.position);

        if (distance < 0.05f)

        {

            return true;    //到达point

        }

        //向目标点移动

        Vector3 direction = (pointR - transform.position).normalized;

        transform.Translate(direction * moveSpeed * Time.deltaTime, Space.World);

        return false;

    }

}