一类C^2连续可调控的交错B样条曲面

A Class of C^2 Modifiable Alternate B-Spline Surfaces

提出一类C2连续可调控的带参数ε的交错B样条曲面的生成方法，这种曲面具 有普通3次B样条曲面的主要性质。在控制点固定时，改变参数的值能调控曲面的位置，当ε →时曲面整体地逼近于控制多面体网。

This paper presents a method for generating a class of C 2 modifiable alternate B-spline surface with a parameterε. The surface has main properties o f ordinary B-splone sruface and can modify globally its position even approximat e to the control nets as the parameterεtends to zero.