交互式CAD的协同绘图系统(英文)

Cooperative Drawing System for Interactive CAD

描述了一个同步式协同设计系统———协同绘图系统 ,给出了系统共享信息的存储结构和并发控制机制 .在共享信息存储结构中提出了图形信息的复制对象和文字、命令信息的集中对象的数据结构 .为了使多用户可以协同一致地工作 ,采用了三种并发控制机制结合的并发控制方案 .另外 。

This paper describes a synchronous cooperative system-the Cooperative Drawing (Co_Drawing) system. In our system, the sharing information storage architecture and the concurrency control mechanisms are presented. Replicated objects for graphics and centralized objects for text and command are used simultaneously as the sharing information storage architecture. The combination of three mechanisms for the concurrency control is adopted so as to enable multi_user to work coordinately and consistently. Finally, the paper presents a prototype implementation of the Co_Drawing system that has examined the approach of a synchronous cooperative design environment.