基于图形对象的一致性维护问题的研究

针对实时协同图形编辑系统中一致性维护关键问题,提出了一种基于图形对象的并发控制算法。该算法扩展了面向文本编辑的分布式操作转换dOPT算法,满足图形对象属性级上数据一致性维护,同时通过预定义图形对象间的关联关系和位置属性约束规则,进行操作语义维护管理,使得实时协同图形编辑系统的一致性维护更为有效和完备。

RESEARCH ON CONSISTENCY MAINTENANCE BASED ON GRAPHIC OBJECT

A concurrent control algorithm based on graphic object is proposed in this paper for the key problem of consistency maintenance in real-time collaborative graphics editing system.It expands the text editor-oriented distributed operations transform algorithm,dOPT,and satisfies the data consistency maintenance on graphic object attribute level.At the same time,it carries out operational semantic maintenance management through predefining the relationship and position attribute-constraints rules between graphic objects,which makes the consistency maintenance of real-time collaborative graphics editing system more effective and complete.