Function conjoined_pits

src/trap.c:6551–6577

}

boolean
conjoined_pits(
    struct trap *trap2,
    struct trap *trap1,
    boolean u_entering_trap2)
{
    coordxy dx, dy;
    int diridx, adjidx;

    if (!trap1 || !trap2)
        return FALSE;
    if (!isok(trap2->tx, trap2->ty) || !isok(trap1->tx, trap1->ty)
        || !is_pit(trap2->ttyp)
        || !is_pit(trap1->ttyp)
        || (u_entering_trap2 && !(u.utrap && u.utraptype == TT_PIT)))
        return FALSE;
    dx = sgn(trap2->tx - trap1->tx);
    dy = sgn(trap2->ty - trap1->ty);
    diridx = xytodir(dx, dy);
    if (diridx != DIR_ERR) {
        adjidx = DIR_180(diridx);
        if ((trap1->conjoined & (1 << diridx))
            && (trap2->conjoined & (1 << adjidx)))
            return TRUE;
    }
    return FALSE;
}

staticfn void
clear_conjoined_pits(struct trap *trap)