矢量图形的面向对象建模及其在数据转换中的应用

Object-Oriented Model based on Vector Graph and the application in data exchange

面向对象建模技术具有抽象性和封装性,适宜统一各类图形标准的共同点;同时也有继承和多态性,适宜分别处理各类标准的不同点.本文对图形系统采用面向对象技术建模.将图形处理部分独立出来形成组件系统,并提供统一接口.这样既可支持编辑和显示,也可以以对象模型为中介,实现不同矢量图形数据标准间的转换.

The technology of Object - Oriented Model has property of abstraction and capsulation. It is suitable for generalizing dif- ferent standard of vector graph. And it＇s property of Inheritance and polymorphisrn, it is suitable for separating the different context in different standard. In this paper, the Object - Oriented Model is studied. With unified interface, the component system of graph is built, Its function is not only editing and appearing, but also exchange data between different standard by the Object- Oriented Model.