这是图形学中三次参数样条曲线算法，用户可从中了解到三次参数样条曲线实现。-This is the graphics cubic parametric spline curve algorithm, which users can learn to achieve cubic parametric spline curve.

B样条函数插值，可以利用它对一些曲线进行光滑的插值-B-spline interpolation, we can use it to some smooth curve interpolation