天空盒的绘制，里面只要替换图片就可以换成一个新的天空盒-Drawing the sky boxes, which as long as the picture can be replaced by the replacement of a new sky box

经典的游戏编程书籍，能帮助你轻松的掌握很多技巧，不过需要一定的E文功底-Game Programming classic books can help you a lot of relaxed master skills, but must necessary foundation text of E