运行后显示两个立方体，一个大的，一个小的，其中一个是4维的，一个是三维的，没有面，只有边。我不知道怎么处理边和面的遮挡。 按键盘上的1234数字键中的两个，使整体朝某个角度旋转（4维空间旋转有6个方向）。如果同时按着shift就反向旋转。
After running, two cubes are displayed, one large and one small, one of which is 4-dimensional and one is three-dimensional, with no faces, only edges. I don't know how to deal with edge and face occlusion.
Press two of the 1234 numeric keys on the keyboard to rotate the whole to a certain angle (there are 6 directions for rotation in 4-dimensional space). If you hold down shift at the same time, the rotation will reverse.
press shift 、 1 、2、3、4 、arrow keys to see how it work
