android的3D屏幕翻转中X axis 的含义？？
先给个链接：
http://www.cnblogs.com/hanyonglu/archive/2012/02/12/2347636.html
/**
* Applies a rotation transform around the X axis.
*
* @param deg The angle of rotation around the X axis, in degrees
*
* @see #rotateY(float)
* @see #rotateZ(float)
* @see #rotate(float, float, float)
*/
public native void rotateX(float deg);
