曲线曲面立体阴影作图
- 格式:pptx
- 大小:3.16 MB
- 文档页数:35
2006年 工 程 图 学 学 报2006第2期 JOURNAL OF ENGINEERING GRAPHICS No.2曲面立体完整画隐线图的标记薛天跃1,董黎君2(1. 太原科技大学,山西太原 030024;2. 太原理工大学机械工程学院,山西太原 030024)摘要:提出了三面顶点“流形”曲面立体完整画隐线图的标记理论和方法。
在三面顶点曲面立体完整画隐线图中合法的节点型式共有69种,其中Y型节点有8种,W型节点有16种,S型节点有11种,V型节点有34种。
对曲面立体完整画隐线图进行标记,能够判断其是否可能为“流形”曲面立体的投影,区分正确与不正确画隐线图。
提出的完整画隐线图标记方法也适用于平面立体画隐线图。
算例证明曲面立体完整画隐线图标记方法是正确、可行和有效的。
关键词:计算机应用;线图标记;画隐线图;曲面立体中图分类号:TP 391.41文献标识码:A 文章编号:1003-0158(2006)02-0064-08Labeling Line Drawings with Hidden-Part-Draw forCurved Surface ObjectsXUE Tian-yue1, DONG Li-jun2(1. Taiyuan University of Science and Technology, Taiyuan Shanxi 030024, China;2. Taiyuan University of Technology, Taiyuan Shanxi 030024, China)Abstract: A new labeling theory and method are proposed for the line drawings with hidden-part-draw for the three-dimensional manifold curved surface objects with trihedral vertices. Some rules for labeling are established. There are 69 kinds of possible junctions for line drawings, including 8 kinds of junctions for Y type, 16 for W, 11 for S, and 34 for V. By labeling line drawings for curved surface objects, two things can be judged: one is whether the projection of curved surface objects is manifold; another is whether the line drawings with hidden-part-draw is correct or incorrect. This labeling method can also be used for planar objects. The given sample shows that this proposed labeling method is correct.Key words: computer application; line drawing labeling; line drawings with hidden-part-draw;curved surface object收稿日期:2005-10-17基金项目:陕西省自然科学基金资助项目(2002E224)线图一直是人们之间以及人与计算机之间交换三维物体(或场景)信息的一种重要媒介。