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双三次NURBS曲面矩阵块表示及在曲面设计中的应用
Expression of block matrixes of cubic NURBS surface and its application in surface design
【摘要】 研究了NURBS三次与二次曲面的矩阵块表示及在曲面设计中的应用。给出了NURBS三次与二次基函数系数矩阵表示和NURBS三次曲面矩阵块表示。从矩阵块表示中可很清楚地看出参数区间、曲面片与控制顶点对应关系,这点对NURBS曲面自由变形与求解都很重要。通过在Java2.0与Java3D环境下检验证明该算法高效可靠。
【Abstract】 The expression of block matrixes of cubicand square NURBS surfaces and itsapplication insurface design is mainly discussed. The coefficient matrixes of cubic and square NURBS base functions and the expression of block matrixes of cubic NURBS surface are given. From this expression, the relationship among parametric zone, patch, and control points can be easily understood. This is very important to the free form deformation and its solutions. It is proved to be high efficient and reliable under Java2.0 and Java3D environment.
【关键词】 基函数系数矩阵表示;
NURBS三次曲面的矩阵块表示;
NURBS曲面自由变形与求解;
【Key words】 coefficient matrixes of NURBS base functions; expression of block matrixes of cubic NURBS surface; free form deformation and its solutions;
【Key words】 coefficient matrixes of NURBS base functions; expression of block matrixes of cubic NURBS surface; free form deformation and its solutions;
【基金】 航空科学基金项目(99H53111)
- 【文献出处】 计算机工程与设计 ,Computer Engineering and Design , 编辑部邮箱 ,2005年04期
- 【分类号】TP391.72
- 【被引频次】11
- 【下载频次】258