相機控制：採用鍵盤上下左右控制鏡頭的運動，首先要將玩家的鍵入轉化為signal：

    public string keyJRight;
    public string keyJLeft;
    public string keyJUp;
    public string keyJDown;

    public float Jup;//相機控制
    public float Jright;

void Update()
    {
        //相機轉signal
        Jup = (Input.GetKey(keyJUp) ? 1.0f : 0) - (Input.GetKey(keyJDown) ? 1.0F : 0);
        //print(Jup);
        Jright = (Input.GetKey(keyJRight) ? 1.0f : 0) - (Input.GetKey(keyJLeft) ? 1.0F : 0);
        }