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.