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浙江大学学报(理学版)  2023, Vol. 50 Issue (1): 63-68    DOI: 10.3785/j.issn.1008-9497.2023.01.010
数学与计算机科学     
空间参数曲线的双目标能量极小化方法及其应用
李军成(),刘成志,罗志军,龙志文
湖南人文科技学院 数学与金融学院,湖南 娄底 417000
Bi-objective energy minimization of spatial parametric curves and its applications
Juncheng LI(),Chengzhi LIU,Zhijun LUO,Zhiwen LONG
College of Mathematics and Finance,Hunan University of Humanities,Science and Technology,Loudi 417000,Hunan Province,China
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摘要:

能量极小化方法已广泛用于平面曲线的构造,而在空间曲线构造方面的应用尚少。首先介绍了空间参数曲线的弯曲能和扭曲能,然后提出了一种以弯曲能和扭曲能同时极小为目标的空间参数曲线构造方法,最后以空间三次Bézier曲线为例,探讨了该方法在曲线的构造、延拓、平滑等问题中的应用。所提出的方法更符合空间参数曲线既需考虑弯曲又需考虑扭曲的特点。

关键词: 空间参数曲线能量极小化弯曲能扭曲能双目标优化Bézier曲线    
Abstract:

Although approach of energy minimizations has been widely applied in the construction of planar curves, it is seldom used in the construction of spatial curves. In this paper, we first introduce the bending energy and twisting energy of spatial parametric curves. A method of constructing spatial parametric curves aiming at minimizing the bending energy and twisting energy simultaneously is then proposed. Finally, the applications of the proposed method in the construction, extension, and smoothing of the cubic Bézier curve are discussed. The proposed method conforms with the fact that both bending and twisting are important shape features of spatial parametric curves.

Key words: spatial parametric curve    energy minimization    bending energy    twisting energy    bi-objective optimization    Bézier curve
收稿日期: 2021-09-10 出版日期: 2023-01-13
CLC:  TP 391.72  
基金资助: 湖南省自然科学基金资助项目(2021JJ30373);国家自然科学基金资助项目(12101225)
作者简介: 李军成(1982—),ORCID:https://orcid.org/0000-0002-1904-4068,男,博士,教授,主要从事计算机辅助几何设计及其应用研究,E-mail:lijuncheng82@126.com.
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引用本文:

李军成,刘成志,罗志军,龙志文. 空间参数曲线的双目标能量极小化方法及其应用[J]. 浙江大学学报(理学版), 2023, 50(1): 63-68.

Juncheng LI,Chengzhi LIU,Zhijun LUO,Zhiwen LONG. Bi-objective energy minimization of spatial parametric curves and its applications. Journal of Zhejiang University (Science Edition), 2023, 50(1): 63-68.

链接本文:

https://www.zjujournals.com/sci/CN/10.3785/j.issn.1008-9497.2023.01.010        https://www.zjujournals.com/sci/CN/Y2023/V50/I1/63

图1  3种能量极小化方法构造的空间三次Bézier曲线
能量极小化方法弯曲能扭曲能
弯曲能极小51.000 0171.000 0
扭曲能极小76.000 00
双目标能量极小75.534 90.025 4
表1  3种能量极小化方法的弯曲能和扭曲能
图2  空间三次Bézier曲线的延拓
图3  空间链接曲线的平滑
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