摘要
本文研究了一种全新的尺寸标注机理，设计了通用、完整、较高层次的尺寸标注模型，在两个方面取得较大进展，其一，在交互标注过程中，借助于知识表达，自动得到尺寸标注类型，使尺寸菜单减少到一层，实现了智能化的尺寸标注；其二，当图形发生拓扑不变的变化时，尺寸标注自动生成，实现了参数化的尺寸标注．尺寸标注的各种修改均在尺寸标注模型的支持之下，并可随时进行．实现了尺寸数字对图线的自动裁剪，图样符合国家标准的规定．
A completely new dimensioning system is presented in this paper.First, with the help of the knowledge,the dimension type is judged automatically and intelligent dimensioning is realized. Second,the results of the user's interactive drafting is parameterized, dimensions are updated automatically with the variational geometry of the drawing. Also the various modifications of dimension are implemented. The clipping of the drawings by the dimension text is also implemented according to the national standards.
出处
《计算机学报》
EI
CSCD
北大核心
1996年第4期270-276,共7页
Chinese Journal of Computers
基金
国家杰出青年科学基金
关键词
尺寸标注
知识表达
参数化
CAD
Dimension marking, dimension model, knowledge, parameterization.
