A kind of mesh deformation method driven by curve was put forward and it was applied to shoe last design system. Based on topological neighborhood information of triangular mesh model,cross-section contour curve was extracted rapidly;feature point set was extracted by extreme value method of principal curvature,moving least-squares method was used to thin the point set and made it ordered and sparse to fit B-Spline curve. Through such as editing cross-section contour curve or feature curve interactively to make shoe last redesigned come true. Finally,it showed how the method apply to shoe last CAD system.

提出了一种曲线驱动的网格变形方法并把其应用于鞋楦的设计系统。基于三角网格模型的拓扑邻接信息,快速提取截面轮廓曲线;由主曲率极值法提取模型特征点集,利用移动最小二乘法细化该点集并对其进行排序、稀疏,然后将细化后的点集拟合为B样条曲线。计算曲线上采样点与模型上的对应点,从而使曲线与模型相关联,通过交互编辑截面轮廓曲线或特征曲线等来实现鞋楦的再设计。最后给出了该方法在鞋楦CAD系统中的功能实现。

鞋楦, 定制CAD, 拉普拉斯网格变形, 特征线