基于弦长参数的NURBS曲面设计

NURBS Patch Design by String Parameter

采用里森费尔德方法计算型值点间的弦长值 ,以此作为主要参数构造节点矢量 ,实现了用 NU RBS工具精确建模和自由曲面设计的目标 .在此基础上 ,利用 VC+ +开发自由曲面造型模块 ,根据输入的控制点自动生成NURBS曲面 ,并能实现曲面形状交互式修改 .

The distance of model node can be calculated by Riesenfeld method and the string is the main parameter to build node vector . we can use NURBS to build model and free design patch. The free model can be developed through VC ++ , according to control points. NURBS can be built automatically in the algorithm, and its shape and attribute can also be modified easily by interactive mode.