class Compare
{
    public:
        Compare( bool theVert, bool theDesc )
           : vert( theVert ),
             desc( theDesc )
        {
        }

        bool operator () ( Object* a, Object* b )
        {
            float n1 = a->x;
            float n2 = b->x;

            if ( theVert )
            {
                n1 = a->y;
                n2 = b->y;
            }

            return ( desc ) ? ( n1 < n2 ) : ( n2 >= n1 );
        }

    private:
        const bool vert;
        const bool desc;
};