al_invert_transform3
Allegro 5 api
Usage
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#include <allegro5/allegro.h> void al_invert_transform(ALLEGRO_TRANSFORM *trans)
Overview
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:
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trans - Transformation to invert
Note: Allegro’s transformation inversion functions work correctly only with 2D transformations.