debian man page for get_z_rotate_quat

get_x_rotate_quat(3alleg4)					  Allegro manual					get_x_rotate_quat(3alleg4)

NAME
       get_x_rotate_quat, get_y_rotate_quat, get_z_rotate_quat - Construct axis rotation quaternions. Allegro game programming library.

SYNOPSIS
       #include <allegro.h>

       void get_x_rotate_quat(QUAT *q, float r);

       void get_y_rotate_quat(QUAT *q, float r);

       void get_z_rotate_quat(QUAT *q, float r);

DESCRIPTION
       Construct  axis	rotation quaternions, storing them in q. When applied to a point, these quaternions will rotate it about the relevant axis
       by the specified angle (given in binary, 256 degrees to a circle format).

Allegro 							   version 4.4.2					get_x_rotate_quat(3alleg4)