三维立体造型中的一般扫描操作及其应用  

3D SOLID MODELING OF GENERAL SWEEP OPERATION AND ITS APPLICATION

作　　者：应道宁[1] 程刚[1] 张振强[1] 

机构地区：[1]浙江大学

出　　处：《图学学报》1990年第2期63-68,共6页Journal of Graphics

摘　　要：本文对三维立体造型中的一般扫描技术进行了研究,并在PLAN-SMITH的基础上,研制了一个采用一般扫描技术构造三维扫描体素的GSP系统,用以丰富立体造型系统的形体构造器,扩大形体的几何覆盖域和造型功能。该系统的主要功能有:等截面扫描、变截面扫描、平滑过渡扫描及多控制面扫描,可在一给定的三维轴线上对一个、二个或多个二维廓线进行扫描操作。该系统生成的一般扫描体素可参与PLAN-I中的布尔运算、真实感显示、物性计算、有限元分析及NC轨迹自动生成等后续处理。另外,本文还对一般扫描技术在多面体棱角倒圆及二维曲面相贯线间的圆角平滑问题上的应用作了一些初步的探讨。In this paper,a general sweep technique in 3D solid modeling is presented.According to this tech-nique,a general sweep primitive generator system,GSP system,is built on the basis of PLAN-SMITH,in order to improve the constructor of solid modeling system and extend the range and ability ofmodeling.This system allows sweeps with one,tow,or several closed 2D contour along a 3D trajecto-ry,thus produces a complex 3D primitive solid.An interface with PLAN- I system is designed,so thesweep primitives can do post-processes like Boolean operation,shading,mass properties calculations,FEanalysis,etc.in PLAN- I.In addition,the application of general sweep technique on polyhedron cornerrounding,and intersection line smoothing between two quadratic surfaces,is preliminarily studied inthis paper.

关 键 词：立体造型 真实感显示 布尔运算 体素 系统生成 曲面体 廓线 覆盖域 相贯线 圆角 

分 类 号：TB23-55[一般工业技术—工程设计测绘]