Function unmap_object

src/display.c:408–438

* unmap_object() * * Remove something from the map when the hero realizes it's not there * anymore. Replace it with background or known trap, but not with * any other remembered object. If this is used for detection, a full * screen update is imminent anyway; if this is used to get rid of an * invisible monster notation, we might have to call newsym(). */

 * invisible monster notation, we might have to call newsym().
 */
void
unmap_object(coordxy x, coordxy y)
{
    struct trap *trap;
    struct engr *ep;

    if (!svl.level.flags.hero_memory)
        return;

    if ((trap = t_at(x, y)) != 0 && trap->tseen && !covers_traps(x, y)) {
        map_trap(trap, 0);
    } else if (levl[x][y].seenv) {
        struct rm *lev = &levl[x][y];

        if (spot_shows_engravings(x, y)
            && (ep = engr_at(x, y)) != 0 && !covers_traps(x, y)) {
            if (cansee(x, y))
                ep->erevealed = 1;
            map_engraving(ep, 0);
        } else {
            map_background(x, y, 0);
        }

        /* turn remembered dark room squares dark */
        if (!lev->waslit && lev->glyph == cmap_to_glyph(S_room)
            && lev->typ == ROOM)
            lev->glyph = cmap_to_glyph(S_stone);
    } else {
        levl[x][y].glyph = cmap_to_glyph(S_stone); /* default val */
    }
}

/*
 * map_location()