In this paper,a method of approach to curve &Surface modelling based on triangle function is proposed,which has the principal merits of B-Spline and achieres aC3 curve.

• 本文提出了一种基于三角函数的拟合方法,它具有B样条的主要优点,并达到C3级连续,因此,这一方法适用于自由曲线曲面的设计。