al_fixcos(3)

NAME
al_fixcos - Allegro 5 API

SYNOPSIS

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

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

Example:

        al_fixed angle;
        float result;
        /* Set the binary angle to 45 degrees. */
        angle = al_itofix(32);
        /* The cosine of 45 degrees is about 0.7071. */
        result = al_fixtof(al_fixcos(angle));
        assert(result > 0.7 && result < 0.71);

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