al_fixtan(3)

NAME
al_fixtan - Allegro 5 API

SYNOPSIS

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

DESCRIPTION
This function finds the tangent of a value using a lookup table. The input value must be a fixed point binary angle.

Example:

        al_fixed angle, res_a, res_b;
        float dif;
        angle = al_itofix(37);
        /* Prove that tan(angle) == sin(angle) / cos(angle). */
        res_a = al_fixdiv(al_fixsin(angle), al_fixcos(angle));
        res_b = al_fixtan(angle);
        dif = al_fixtof(al_fixsub(res_a, res_b));
        printf("Precision error: %f\n", dif);

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