So necessary to design a piece of developing platforms that has basic graphic elements already . we can utilize the encapsulation nature and the reusable nature of basic graphic elements to drag and draw basic graphic elements and produce the three - dimensional figure and three - dimensional scene 所以有必要设计一个开发平台，平台上提供可视化的基本图元，利用基本图元的封装性、可重用性，在平台界面上拖拽基本图形元素，生成三维图形和三维场景。
