很有参考价值的OPENGL代码，根据二次曲面函数画出其波形，实现的波形的旋转，移动，缩放，光线，材料，背景，填充等设置，包括了OPENGL基本编程的大部分操作。-OPENGL valuable code, according to quadric function draw its waveform, the waveform to achieve the rotation, move, zoom, lighting, materials, background, fill and other