BTMS_HASZ
sc->sc_flags |= BTMS_HASZ;
if (sc->sc_flags & BTMS_HASZ)
sc->sc_flags |= BTMS_HASZ;
sc->sc_flags & BTMS_HASZ ? " and Z dir" : "",
if (sc->sc_flags & BTMS_HASZ) {
sc->sc_flags = BTMS_HASZ | BTMS_REVZ;