摘要
消隐可增强三维图的立体感和直观性,使图形所表达的物体形状唯一被确定。利用投影图可保留三维模型拓扑关系的特性,针对线框模型提出利用图形在投影变换后线段深度的差值来进行隐藏线的判断,使问题得以简化。通过线段在投影过程中的深度比较,可区分可见线段和不可见线段,利用邻边几何关系补充部分可见线段,结合LISP语言和VB软件生成人机交互系统,使计算机能够实现对立体图的消隐。
Technique of hidden surface can enhance the stereoscopic effects and intuitive effects,and make the drawing express the definite shape.The projection drawing can keep the characteristics of three-dimensional（model′s） topological relationships.By the way of comparing the intersection depths of projection transformation,a method of removing hidden line aimed at wireframe projection drawing is proposed.By comparing the depths of intersection,the unvisible lines can be distinguished from the visible lines.Parts of visible lines can be redrawn with the neighbor geometry relationship.Furthermore combined with human-computer interaction system which is made with VisualLISP language embedded in AutoCAD software and VB software,the hiding of the unvisible lines is realized.
出处
《华东理工大学学报（自然科学版）》
CAS
CSCD
北大核心
2011年第2期250-253,共4页
Journal of East China University of Science and Technology
关键词
计算机应用
消隐
投影变换
线框模型
LISP
computer application
blanking
projection transformation
wireframe model
LISP
