中文说明：采用matlab编写B样条绘制程序，可以选择四种节点矢量，采用Deboor算法，详细参看计算机辅助几何设计的书籍(CAGD)
English Description：
Using MATLAB to write B-spline drawing program, four kinds of node vectors can be selected, deboor algorithm can be used, see the book of computer aided geometric design (CAGD) for details