Constructing Subdivision Curves on Manifolds with Conformal Mapping ZHU Wen-ming, DENG Jian-song, CHEN Fa-lai

نویسندگان

  • ZHU Wen - ming
  • DENG Jian - song
  • CHEN Fa - lai
چکیده

Curve design on manifolds is very important in many applications. We propose a curve subdivision approach based on conformal mapping of manifolds. It is proved by experiments that the resulting curves in some sense have nice smoothness and inherite some properties of subdivision curves in 3 R space, such as the curves might interpolate or approximate the initial points. Some examples are provided to illustrate the efficiency. Keyword: curve subdivision, conformal mapping, manifold. 1 本工作得到“973”项目(2004CB318000),国家杰出青年基金(60225002),国家自然科学基金(No. 60533060 和 60473132),教育部高校青 年教师奖励计划,教育部留学回国人员科研启动基金的资助。 1 引 言 流形上的曲线设计在机器人刚体动作设计 ,制造几何学 以及计算机动画等领域 有着广泛的应用,是最近十几年来研究的热点问题 之一。比如在动画设计中,要求摄像机沿着物体表 面从一点移动到另外一点,这就需要给摄像机安排 一条好的光滑路径曲线,并且要求这条曲线能紧贴 着物体表面。 对于一般欧氏空间里的自由曲线设计方法有很 多种,比如样条曲线、细分曲线等等,这里不再赘 述。我们关注的是给定曲面上的一些点,如何通过 细分的方法设计一条这个曲面上比较光滑的路径, 使得它插值或者逼近这些点。目前这方面的研究还 主要使用的是变分方法。Hofer通过扩展三次 B 样

برای دانلود رایگان متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Conformal mappings preserving the Einstein tensor of Weyl manifolds

In this paper, we obtain a necessary and sufficient condition for a conformal mapping between two Weyl manifolds to preserve Einstein tensor. Then we prove that some basic curvature tensors of $W_n$ are preserved by such a conformal mapping if and only if the covector field of the mapping is locally a gradient. Also, we obtained the relation between the scalar curvatures of the Weyl manifolds r...

متن کامل

New Proof of Dimension Formula of Spline Spaces over T-meshes via Smoothing Cofactors

A T-mesh is basically a rectangular grid that allows T-junctions. Recently, Deng etal introduced splines over T-meshes, which are generalizations of T-splines invented by Sederberg etal, and proposed a dimension formula based on the B-net method. In this paper, we derive an equivalent dimension formula in a different form with the smoothing cofactor method. Mathematics subject classification:

متن کامل

"Perfect" designer chromosome V and behavior of a ring derivative.

Perfect matching of an assembled physical sequence to a specified designed sequence is crucial to verify design principles in genome synthesis. We designed and de novo synthesized 536,024-base pair chromosome synV in the "Build-A-Genome China" course. We corrected an initial isolate of synV to perfectly match the designed sequence using integrative cotransformation and clustered regularly inter...

متن کامل

The Dendrobium catenatum Lindl. genome sequence provides insights into polysaccharide synthase, floral development and adaptive evolution.

Orchids make up about 10% of all seed plant species, have great economical value, and are of specific scientific interest because of their renowned flowers and ecological adaptations. Here, we report the first draft genome sequence of a lithophytic orchid, Dendrobium catenatum. We predict 28,910 protein-coding genes, and find evidence of a whole genome duplication shared with Phalaenopsis. We o...

متن کامل

A consensus on liquid biopsy from the 2016 Chinese Lung Cancer Summit expert panel

The diagnosis and treatment of lung cancer have evolved into the era of precision medicine. Liquid biopsy, a minimally invasive approach, has emerged as a promising practice in genetic profiling and monitoring of lung cancer. Translating liquid biopsy from bench to bedside has encountered various challenges, including technique selection, protocol standardisation, data analysis and cost managem...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2007