说明：  NURBS 曲线是现代工业与造型中使用最多的一种曲线,本文提供的是其的生成算法的具体代码,该代码可直接拿来就使用.
(NURBS curve is used in modern industry and shape up to a curve, in this article is its generation algorithm is a specific code that can be directly brought on the use of.)