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Bézier曲面的精确自由变形

Accurate Free-Form Deformation of Bézier Surfaces
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摘要 将一个Bézier曲面嵌入一个四面体中进行自由变形,变形后的曲面是张量积Bézier曲面和四面体Bézier体的复合,利用移位算子和广义de Casteljau算法可以得到复合后控制顶点的表示.给出了矩形网格的2次和3次Bézier体自由变形的计算公式. To process with free-form deformation, a Bézier surface is embedded into a tetrahedron. The new surface is the composition of a tensor product Bézier surface and a tetrahedral Bézier volume. The composted surface is a Bézier surface whose control points can be got using shifting operators and de Casteljau algorithm. Finally, the formula to calculate the order 2 and 3 free-form deformation of the rectangle mesh are given.
出处 《计算机辅助设计与图形学学报》 EI CSCD 北大核心 2006年第8期1160-1164,共5页 Journal of Computer-Aided Design & Computer Graphics
基金 国家自然科学基金(60473130) 国家重点基础研究发展规划项目(2004CB318000)
关键词 函数复合 自由变形 BÉZIER曲面 移位算子 functional composition free-form deformation Bézier surfaces shifting operators
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