al_fixatan(3) al_fixatan(3)

al_fixatan - Allegro 5 API

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

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.


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

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

Allegro reference manual