Opengl绘制Bezier 曲线,并且可以控制一个小球在曲线上运动。-Draw Bezier Curve with Opengl

用图形学算法绘制Bezier曲线，可以用鼠标拖动Bezier曲线的控制顶点来动态地改变Bezier曲线的形状。-Graphics rendering algorithm using Bezier curves, you can use the mouse to drag Bezier curve control points to dynamically change the shape of Bezier curves.

4个控制点P0、P1、P2、P3连成的折线多边形称为特征多边形，Bezier曲线的形状是由这个多边形的各个顶点的位置确定的，特征多边形的形状改变，则曲线的形状也就随之改变。-Four control points P0, P1, P2, P3 even into the broken line polygon called the characteristics of polygons, Bezier curves is the shape of the polygon to determine