al_transpose_transform - Allegro 5 API

       Transposes  the matrix of the given transform.  This can be used for inversing a rotation transform.  For
       example:

              al_build_camera_transform(camera, 0, 0, 0, x, y, z, xu, yu, zu)
              al_copy_transform(inverse, camera)
              al_transpose_transform(camera)
              // Now "inverse" will be a transformation rotating in the opposite
              // direction from "camera". Note that this only works if the camera
              // position is 0/0/0 as in the example.

       al_transpose_transform - Allegro 5 API

       5.2.5

Allegro reference manual                                                         al_transpose_transform(3alleg5)

              #include <allegro5/allegro.h>

              void al_transpose_transform(ALLEGRO_TRANSFORM *trans)