基于几何约束的图形输入系统开发的新探索

New Attempts in the Development of Graphic Input System Based on Geometric Constraint

本文运用几何约束的方法，开发了一种实用、新颖的图形输入系统．文中介绍了该系统的图形模型，对基本几何图素、工程中常用的几何形体以及它们的运算、操作作了描述．该系统可自动查找约束条件数，实现系列化图形的快速生成．

Based on the theories of geometric constraint, a new practical system of graphic input is researched. The paper introduces the graphics models. The basic graphic elements and the geometric shapes in engineering drawing, as well as its operation, are built up. The system can automaticly seek the number of constraint conditions, and a series of drawings can be generated rapidly.