al_fixatan(3)

NAME
al_fixatan - Allegro 5 API

SYNOPSIS

        #include <allegro5/allegro.h>
        al_fixed al_fixatan(al_fixed x)

DESCRIPTION
This function finds the inverse tangent of a value using a lookup table. The input must be a fixed point value. The inverse tangent is the value whose tangent is x.

Example:

        al_fixed result;
        /* Sets result to binary angle 13. */
        result = al_fixatan(al_ftofix(0.326));

RETURN VALUE
Returns the inverse tangent of a fixed point value, measured as a fixed point binary format angle.