实现双三次B样条曲面，计算机图形学的内容，利用VC++6.0实现。- Realization of dual three B spline surface, the contents of the computer graphics, the use of VC++6.0 to achieve.

计算机图形学中的利用B样条曲线实现的三次B样条曲面。-In computer graphics, the use of B spline curves to achieve the three B spline surface.