Local shape control for free-form solids in exact CSG representation

被引：1

作者：

Guo, BN ^{[1
]}

Menon, J ^{[1
]}

机构：

[1] IBM CORP,THOMAS J WATSON RES CTR,YORKTOWN HTS,NY 10598

来源：

COMPUTER-AIDED DESIGN | 1996年 / 28卷 / 6-7期

关键词：

geometric modelling; constructive solid geometry; shape control;

D O I：

10.1016/0010-4485(95)00062-3

中图分类号：

TP31 [计算机软件];

学科分类号：

081202 ; 0835 ;

摘要：

We present a shape control scheme for free-form solids represented in CSG as Boolean combinations of low-degree algebraic halfspaces. In this scheme, we can create manifold solids of arbitrary topology through polyhedral smoothing, and the resulting shapes may be modified by changing control points and/or control weights, with each control point and weight having a local effect. As a solid changes shape, incremental B-rep-CSG conversions are used for fast updates of the corresponding CSG representation. A key ingredient of our scheme, and a main contribution of this paper, is an algorithm that uses Kuhn-Tucker conditions to efficiently compute valid control points. Published by Elsevier Science Ltd

引用

页码：483 / 493

页数：11