Modeling of Free-Form Complex Curves Using SG-Bézier Curves with Constraints of Geometric Continuities

Modeling of Free-Form Complex Curves Using SG-Bézier Curves with Constraints of Geometric Continuities
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使用具有几何连续性约束的 SG-Bézier 曲线对自由形式复杂曲线进行建模

DOI:
10.3390/sym10110545
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发表时间:
2018-10
期刊:
Symmetry
影响因子:
--
通讯作者:
Guo Wei
Guo Wei
中科院分区:
其他
文献类型:
--
作者:
Fei Hou;Gang Hu;Cuicui Bo;Junli Wu;Guo Wei

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自由曲面工程复杂曲线造型是产品造型、图形学和计算机辅助设计/计算机辅助制造(CAD/CAM)中的一个重要课题。本文提出了一种基于形状可调的广义Bézier(简称SG-Bézier)曲线构造自由复杂曲线的新方法。为了克服工程中大多数组合曲线往往不能只用一条曲线构造的困难,提出了两条相邻SG-Bézier曲线G1和G2连续的充要条件.研究了两条SG-Bézier曲线光滑连续的具体步骤,以及形状参数对复合曲线的影响规律。我们还给出了SG-Bézier曲线的一些重要应用。建模实例表明,本文的方法是非常有效的,可以很容易地执行,并提供了一个替代的强大的策略,为复杂曲线的设计。
The modeling of free-form engineering complex curves is an important subject in product modeling, graphics, and computer aided design/computer aided manufacturing (CAD/CAM). In this paper, we propose a novel method to construct free-form complex curves using shape-adjustable generalized Bézier (or SG-Bézier, for short) curves with constraints of geometric continuities. In order to overcome the difficulty that most of the composite curves in engineering cannot often be constructed by using only a single curve, we propose the necessary and sufficient conditions for G1 and G2 continuity between two adjacent SG-Bézier curves. Furthermore, the detailed steps of smooth continuity for two SG-Bézier curves, and the influence rules of shape parameters on the composite curves, are studied. We also give some important applications of SG-Bézier curves. The modeling examples show that our methods in this paper are very effective, can easily be performed, and can provide an alternative powerful strategy for the design of complex curves.
DOI: 10.1016/j.advengsoft.2018.03.003
发表时间: 2018-07
期刊: Adv. Eng. Softw.
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