基于层次B样条的自由形状特征重用  

Freeform Feature Reuse Based on Hierarchical B-spline

作　　者：赵伟[1] 高曙明[1] 

机构地区：[1]浙江大学CAD & CG国家重点实验室,杭州310027

出　　处：《计算机辅助设计与图形学学报》2008年第1期6-12,共7页Journal of Computer-Aided Design & Computer Graphics

基　　金：国家自然科学基金(60736019)

摘　　要：借助层次B样条技术提出了一种自由形状特征的重用算法.首先利用低通滤波和泊松方程对源曲面上特征区域进行基面与细节特征的分离操作,求得基面与特征之间的偏移矢量场;然后利用平面参数化将偏移矢量场应用到目标曲面上完成特征重构;最后借助层次B样条技术优化重用结果.实验结果表明,该算法能够有效地完成自由形状特征的重用.This paper presents a freeform feature reuse method based on hierarchical B-spline technique. First, base surface is separated from geometric details by using the Poisson equation and a displacement vector field is obtained. Second, the displacement vector field is applied on the target surface via planar parameterization; Finally, hierarchical B-spline technique is used to refine the reused freeform feature. Experimental results are given to show the robustness and efficiency of the method.

关 键 词：层次B样条 自由形状特征 特征重用 CAD 

分 类 号：TP391.7[自动化与计算机技术—计算机应用技术]