Provided by: allegro5-doc_5.2.10.1+dfsg-1build1_all 

NAME
al_rotate_transform_3d - Allegro 5 API
SYNOPSIS
#include <allegro5/allegro.h>
void al_rotate_transform_3d(ALLEGRO_TRANSFORM *trans,
float x, float y, float z, float angle)
DESCRIPTION
Combines the given transformation with a transformation which rotates coordinates around the given vector
by the given angle in radians.
Note: The vector is assumed to be of unit length (otherwise it will also incur a scale).
SINCE
5.1.3
Allegro reference manual al_rotate_transform_3d(3alleg5)