1al_invert_transform(3)     Library Functions Manual     al_invert_transform(3)
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NAME

6       al_invert_transform
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SYNOPSIS

9              #include <allegro5/allegro.h>
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11              void al_invert_transform(ALLEGRO_TRANSFORM *trans)
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DESCRIPTION

14       Inverts  the  passed  transformation.   If the transformation is nearly
15       singular (close to not having an inverse) then the returned transforma‐
16       tion  may  be  invalid.   Use  al_check_inverse(3)  to ascertain if the
17       transformation has an inverse before inverting it if you are in doubt.
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19       Parameters:
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21       · trans - Transformation to invert
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SEE ALSO

24       al_check_inverse(3)
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28Allegro reference manual                                al_invert_transform(3)