al_invert_transform man page

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:

·
trans - Transformation to invert

See Also

al_check_inverse(3)

Referenced By

al_check_inverse(3).

Allegro reference manual