 			_s.juggler.add(camera);
 		}
 
+		/**
+		 * @private
+		 *
+		 */
 		private static function onIsDebugModeChange():void
 		{
 			if (config.isDebugMode)

			}
		}

		private static function updateViewport(width:Number, height:Number):void
		{
			const viewport:Rectangle = new Rectangle(paddingLeft, paddingTop, width - paddingLeft - paddingRight, height - paddingTop - paddingBottom);


		private static var _onStart:Signal;

		/**
		 * 启动时广播
		 * @return
		 *
		 */
		public static function get onStart():Signal
		{
			return _onStart ||= new Signal();
