al_fixatan - Man Page

#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.

Example:

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.