VertexLayer vertexLayer; /// 点层

        #endregion Fields

        #region Constructors

        /// <summary>
        /// 构造函数
        /// </summary>
        /// <param name="mainWindow"></param>
        private CloverController(MainWindow mainWindow)
        {
            this.mainWindow = mainWindow;
            renderController = RenderController.GetInstance();
        }
 public static RenderController GetInstance()
 {
     if (instance == null)
     {
         instance = new RenderController();
     }
     return instance;
 }