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| 区间三角Bézier曲面的降阶逼近 |
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杨勤民1,2, 杨勋年1,2, 汪国昭1,2
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1.浙江大学,计算机图像图形研究所,浙江,杭州,310027;2.浙江大学,数学系,浙江,杭州,310027
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| 摘要: |
| 给出了高次区间B-B(Bernstein-Bézier)曲面的降阶逼近算法.这里主要采用了线性规划方法,对降一阶情况还给出了分析求解方法.降阶逼近的结果可用于满足不同CAD系统之间数据转换的需要,也可用于节省一些几何操作的计算时间. |
| 关键词: 计算机辅助几何设计 区间三角B-B(Bernstein-Bézier)曲面 降阶逼近 |
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| 基金项目:国家自然科学基金资助项目(60073023);国家重点基础研究发展规划973资助项目(G1998030600) |
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| Approximate Degree Reduction of Interval Triangular Bézier Surfaces |
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YANG Qin-min,YANG Xun-nianx,WANG Guo-zhao
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| Abstract: |
| An efficient algorithm of bounding interval triangular B-B (Bernstein-Béier) surfaces with lower degree interval triangular B-B surfaces is presented. The algorithm is based on linear programming techniques. An analytical method is also given for degree reduction of one order. The result of degree reduction approximation can be used for the purpose of data transmission among various CAD systems, as well as for the saving of computation time for some geometric operations. |
| Key words: computer aided geometric design interval triangular B-B (Bernstein-Béier) surface approximate degree reduction |