nquad.c

int point2d_nquad_of_rectangled_old(Point2D point, RectangleD rect) {
    int i;
    for (i = 0; i < 4; i++) {
        if (point2d_is_in_rectangled(point, rectangled_nquad(rect, i))) {
            return i;
        }
    }
    return -1;
}

GS_INLINE int point2d_nquad_of_rectangled_new(Point2D p, RectangleD r) { //added middle to RectangleD
    return ((p.y >= r.middle.y) << 1) | (p.x >= r.middle.x);
}