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al_invert_transform(3)                                  al_invert_transform(3)

NAME
       al_invert_transform - Allegro 5 API

SYNOPSIS

              #include <allegro5/allegro.h>

              void al_invert_transform(ALLEGRO_TRANSFORM *trans)

DESCRIPTION
       Inverts the passed transformation.  If the transformation is nearly
       singular (close to not having an inverse) then the returned
       transformation may be invalid.  Use al_check_inverse(3) to ascertain if
       the transformation has an inverse before inverting it if you are in
       doubt.

       Parameters:

       o trans - Transformation to invert

SEE ALSO
       al_check_inverse(3)

Allegro reference manual                                al_invert_transform(3)