新增的第一行是#include <stdio.h> 。它允许我们对文件进行操作，为了在后面的代码中使用fopen()，我们增加了这一行。然后我们增加了三个新的浮点变量...xrot、 yrot、zrot。这些变量用来使立方体绕X、Y、Z轴旋转。最后一行GLuint texture[1]为一个纹理分配存储空间。如果您需要不止一个的纹理，应该将数字1改成您所需要的数字。

-The first line is the new# include <stdio.h>. It allows us to manipulate files, in order to use the code behind fopen (), we added this line. Then we added three new floating-point variables ... xrot, yrot, zrot. These variables are used to rotate the cube X, Y, Z axis. The last line GLuint texture [1] as a texture memory allocation. If you need more than one texture, number 1 should be changed to the number you need.