Unity中對於尋路導航演算法進行了封裝，支援提交將地圖進行導航烘焙

如果想在兩個不連續的平面之間加一個吊橋，在橋放平時可以使物體通過吊橋，而橋擡起時物體在橋邊等待。

1. 給橋的加一個旋轉中心如圖中藍色球體，將橋和地面分開，設定兩個地面的Navigation值如圖，勾選Navigation Static和Generate OffMeshLinks，Navigation Area的值設為Walkable

2. 設定橋體的Navigation值如圖，同樣勾選Navigation Static和Generate OffMeshLinks，如圖在Areas新增標籤bridge，並將Navigation Area的值設為bridge

 private Transform Sphere;
    private bool isOver;
    private GameObject src;
    // Use this for initialization
    void Start ()
    {
        isOver = false;
        Sphere = GameObject.Find("Sphere").transform;
        transform.RotateAround(Sphere.position, Vector3.left, 45
 
);
        src = GameObject.Find("src");
    }

    // Update is called once per frame
    void Update ()
    {
        if(!isOver&&Time.realtimeSinceStartup > 5)
        {
            transform.RotateAround(Sphere.position, Vector3.left, -45);
            isOver = true;
            src.SendMessage("SendMask"
 
, -1);
        }

    }

5.給物體1新增指令碼

public Transform dest;
    private NavMeshAgent agent;

    // Use this for initialization
    void Start ()
    {
        agent = GetComponent<NavMeshAgent>();
        agent.SetDestination(dest.position);
        agent.areaMask = -1 ^ 1 <<6;//第六個標籤   
    }
    void SendMask(int mask)
    {
        agent.areaMask = mask;
    }