绘制n次Bezier曲线时，应可以输入控制点个数及控制点x,y坐标，输入数据可以放到文本文件中，以便调试。对于三次Bezier曲线，用多个曲线段拼接而成，并且要求曲线一阶导数连续。绘制Bezier曲面时，应可以输入控制多面体的顶点坐标与曲线的间距。-Bezier curve drawing n times, should be able to enter the number of control points and control points x, y coordinates, the input data can be placed in a text file, so that

Debugging. For the cubic Bezier curve, the curve segments with multiple splicing, and requires continuous first derivative curve. Drawing Bezier surface

Should enter the control polyhedron vertices and curve pitch.