unity无限地图

 public Transform player;
    public LayerMask mapLayer;

    [Tooltip("新地图")]
    public GameObject newMap;

    [Tooltip("新地图出现在该父组件下")]
    public Transform parent;

    [Tooltip("玩家距离边缘多远开始生成新地图")]
    public float distance;

    void Start()
    {
      
    }

    // Update is called once per frame
    void Update()
    {
        //该脚本挂载在新地图出现的点
        if (Vector2.Distance(player.position, transform.position) < distance )
        {
            if (!Physics2D.OverlapCircle(transform.position, 0.1f, mapLayer))//如果地图出现点没有地图
            {
                var creat=Instantiate(newMap);//创造地图
                creat.gameObject.transform.position = this.transform.position;//将生成的新地图位置变为出现点位置
                creat.transform.SetParent(parent);
                Destroy(this.gameObject);
            }        
        }
    }
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