Function dryup

src/fountain.c:200–239

}

void
dryup(coordxy x, coordxy y, boolean isyou)
{
    if (IS_FOUNTAIN(levl[x][y].typ)
        && (!rn2(3) || FOUNTAIN_IS_WARNED(x, y))) {
        if (isyou && in_town(x, y) && !FOUNTAIN_IS_WARNED(x, y)) {
            struct monst *mtmp;

            SET_FOUNTAIN_WARNED(x, y);
            /* Warn about future fountain use. */
            mtmp = get_iter_mons(watchman_warn_fountain);
            /* You can see or hear this effect */
            if (!mtmp)
                pline_The("flow reduces to a trickle.");
            return;
        }
        if (isyou && wizard) {
            if (y_n("Dry up fountain?") == 'n')
                return;
        }
        /* FIXME: sight-blocking clouds should use block_point() when
           being created and unblock_point() when going away, then this
           glyph hackery wouldn't be necessary */
        if (cansee(x, y)) {
            int glyph = glyph_at(x, y);

            if (!glyph_is_cmap(glyph) || glyph_to_cmap(glyph) != S_cloud)
                pline_The("fountain dries up!");
        }
        /* replace the fountain with ordinary floor */
        set_levltyp(x, y, ROOM); /* updates level.flags.nfountains */
        levl[x][y].flags = 0;
        levl[x][y].blessedftn = 0;
        /* The location is seen if the hero/monster is invisible
           or felt if the hero is blind. */
        newsym(x, y);
        if (isyou && in_town(x, y))
            (void) angry_guards(FALSE);
    }
}

/* quaff from a fountain when standing on its location */
void