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. The return value will be in radians.