这个是在结合opengl中写的一个光线跟踪的程序，可以自己改变观察的视点位置，然后进行渲染图片，我花了很久才写完的 哦-This is in conjunction with opengl wrote a ray-tracing procedure, can change the location of observation point of view, and then proceed to play up the picture, I have spent a long time befo