OpenGL绘制的B样条、贝塞尔曲线和贝塞尔曲面，可以鼠标选取关键点绘制曲线，可以鼠标对关键点进行拖拽，实现平移，旋转操作-OpenGL rendering B-spline, Bezier curves and Bezier surfaces, you can draw the curve of the mouse select the key points, you can drag the mouse right key points to achieve translation, rotation operation