复杂曲线的绘图程序，可以绘制参数样条曲线，贝齐埃曲线 ，B样条曲线，实现绘制，修改，删除等多种功能并显示基函数。CAGD专业非常经典的程序-Complex curve drawing program, you can map parameters spline curve, Pui Maiziere curve, B-spline curve, realize mapping, modify, delete and display a variety of functions, such as