void migrate_to_level(
struct monst *mtmp,
xchar tolev, /* destination level */
xchar xyloc, /* MIGR_xxx destination xy location: */
coord *cc) /* optional destination coordinates */
{
struct obj *obj;
d_level new_lev;
xchar xyflags;
int num_segs = 0; /* count of worm segments */
if (mtmp->isshk)
set_residency(mtmp, TRUE);
if (mtmp->wormno) {
int cnt;
/* **** NOTE: worm is truncated to # segs = max wormno size **** */
cnt = count_wsegs(mtmp);
num_segs = min(cnt, MAX_NUM_WORMS - 1);
wormgone(mtmp);
}
/* set minvent's obj->no_charge to 0 */
for (obj = mtmp->minvent; obj; obj = obj->nobj) {
if (Has_contents(obj))
picked_container(obj); /* does the right thing */
obj->no_charge = 0;
}
if (mtmp->mleashed) {
mtmp->mtame--;
m_unleash(mtmp, TRUE);
}
relmon(mtmp);
mtmp->nmon = migrating_mons;
migrating_mons = mtmp;
newsym(mtmp->mx,mtmp->my);
new_lev.dnum = ledger_to_dnum((xchar)tolev);
new_lev.dlevel = ledger_to_dlev((xchar)tolev);
/* overload mtmp->[mx,my], mtmp->[mux,muy], and mtmp->mtrack[] as */
/* destination codes (setup flag bits before altering mx or my) */
xyflags = (depth(&new_lev) < depth(&u.uz)); /* 1 => up */
if (In_W_tower(mtmp->mx, mtmp->my, &u.uz)) xyflags |= 2;
mtmp->wormno = num_segs;
mtmp->mlstmv = moves;
mtmp->mtrack[1].x = cc ? cc->x : mtmp->mx;
mtmp->mtrack[1].y = cc ? cc->y : mtmp->my;
mtmp->mtrack[0].x = xyloc;
mtmp->mtrack[0].y = xyflags;
mtmp->mux = new_lev.dnum;
mtmp->muy = new_lev.dlevel;
mtmp->mx = mtmp->my = 0; /* this implies migration */
}
void
migrate_to_level(struct monst *mtmp, xchar tolev, /* destination level */
xchar xyloc, /* MIGR_xxx destination xy location: */
coord * cc)
{ /* optional destination coordinates */
struct obj *obj;
d_level new_lev;
xchar xyflags;
int num_segs = 0; /* count of worm segments */
if (mtmp->isshk)
set_residency(mtmp, TRUE);
if (mtmp->wormno) {
int cnt;
/* **** NOTE: worm is truncated to # segs = max wormno size **** */
cnt = count_wsegs(mtmp);
num_segs = min(cnt, MAX_NUM_WORMS - 1);
wormgone(mtmp);
}
/* set minvent's obj->no_charge to 0 */
for (obj = mtmp->minvent; obj; obj = obj->nobj) {
if (Has_contents(obj))
picked_container(obj); /* does the right thing */
obj->no_charge = 0;
}
if (mtmp->mleashed) {
mtmp->mtame--;
m_unleash(mtmp, TRUE);
}
relmon(mtmp);
mtmp->nmon = migrating_mons;
migrating_mons = mtmp;
if (mtmp->dlevel == level)
newsym(mtmp->mx, mtmp->my);
/* The dlevel pointer is meaningless for a migrating monster. Set it to NULL
so that any uses of it are detected quickly via the resulting
segfault. */
mtmp->dlevel = NULL;
new_lev.dnum = ledger_to_dnum((xchar) tolev);
new_lev.dlevel = ledger_to_dlev((xchar) tolev);
/* set migration data */
xyflags = (depth(&new_lev) < depth(&u.uz)); /* 1 => up */
if (In_W_tower(mtmp->mx, mtmp->my, &u.uz))
xyflags |= 2;
mtmp->wormno = num_segs;
mtmp->mlstmv = moves;
mtmp->xlocale = cc ? cc->x : mtmp->mx;
mtmp->ylocale = cc ? cc->y : mtmp->my;
mtmp->xyloc = xyloc;
mtmp->xyflags = xyflags;
mtmp->mux = new_lev.dnum;
mtmp->muy = new_lev.dlevel;
mtmp->mx = COLNO;
mtmp->my = ROWNO; /* this implies migration */
}
/* called when you move to another level
* pets_only: true for ascension or final escape */
void
keepdogs(boolean pets_only)
{
struct monst *mtmp, *mtmp2;
struct obj *obj;
int num_segs;
boolean stay_behind;
for (mtmp = level->monlist; mtmp; mtmp = mtmp2) {
mtmp2 = mtmp->nmon;
if (DEADMONSTER(mtmp))
continue;
if (pets_only && !mtmp->mtame)
continue;
if (((monnear(mtmp, u.ux, u.uy) && levl_follower(mtmp)) ||
(mtmp == u.usteed) ||
/* the wiz will level t-port from anywhere to chase the amulet; if
you don't have it, will chase you only if in range. -3. */
(Uhave_amulet && mtmp->iswiz))
&& ((!mtmp->msleeping && mtmp->mcanmove)
/* eg if level teleport or new trap, steed has no control to
avoid following */
|| (mtmp == u.usteed))
/* monster won't follow if it hasn't noticed you yet */
&& !(mtmp->mstrategy & STRAT_WAITFORU)) {
stay_behind = FALSE;
if (!pets_only && mtmp->mtame && mtmp->meating) {
if (canseemon(mtmp))
pline("%s is still eating.", Monnam(mtmp));
stay_behind = TRUE;
} else if (mon_has_amulet(mtmp)) {
if (canseemon(mtmp))
pline("%s seems very disoriented for a moment.",
Monnam(mtmp));
stay_behind = TRUE;
} else if (!pets_only && mtmp->mtame && mtmp->mtrapped) {
if (canseemon(mtmp))
pline("%s is still trapped.", Monnam(mtmp));
stay_behind = TRUE;
}
if (mtmp == u.usteed)
stay_behind = FALSE;
if (stay_behind) {
if (mtmp->mleashed) {
pline("%s leash suddenly comes loose.", humanoid(mtmp->data)
? (mtmp->female ? "Her" : "His")
: "Its");
m_unleash(mtmp, FALSE);
}
continue;
}
if (mtmp->isshk)
set_residency(mtmp, TRUE);
if (mtmp->wormno) {
int cnt;
/* NOTE: worm is truncated to # segs = max wormno size */
cnt = count_wsegs(mtmp);
num_segs = min(cnt, MAX_NUM_WORMS - 1);
wormgone(mtmp);
} else
num_segs = 0;
/* set minvent's obj->no_charge to 0 */
for (obj = mtmp->minvent; obj; obj = obj->nobj) {
if (Has_contents(obj))
picked_container(obj); /* does the right thing */
obj->no_charge = 0;
}
relmon(mtmp);
newsym(mtmp->mx, mtmp->my);
mtmp->mx = COLNO; /* avoid mnexto()/MON_AT() problem */
mtmp->my = ROWNO;
mtmp->wormno = num_segs;
mtmp->mlstmv = moves;
mtmp->nmon = turnstate.migrating_pets;
turnstate.migrating_pets = mtmp;
} else if (mtmp->iswiz) {
/* we want to be able to find him when his next resurrection chance
comes up, but have him resume his present location if player
returns to this level before that time */
migrate_to_level(mtmp, ledger_no(&u.uz), MIGR_EXACT_XY, NULL);
} else if (mtmp->mleashed) {
/* this can happen if your quest leader ejects you from the "home"
level while a leashed pet isn't next to you */
pline("%s leash goes slack.", s_suffix(Monnam(mtmp)));
m_unleash(mtmp, FALSE);
}
}
}
/* called from resurrect() in addition to losedogs() */
void
mon_arrive(struct monst *mtmp, boolean with_you)
{
struct trap *t;
struct obj *otmp;
xchar xlocale, ylocale, xyloc, xyflags, wander;
int num_segs;
mtmp->dlevel = level;
mtmp->nmon = level->monlist;
level->monlist = mtmp;
if (mtmp->isshk)
set_residency(mtmp, FALSE);
num_segs = mtmp->wormno;
/* baby long worms have no tail so don't use is_longworm() */
if ((mtmp->data == &mons[PM_LONG_WORM]) &&
(mtmp->wormno = get_wormno(mtmp->dlevel)) != 0) {
initworm(mtmp, num_segs);
/* tail segs are not yet initialized or displayed */
} else
mtmp->wormno = 0;
/* some monsters might need to do something special upon arrival _after_
the current level has been fully set up; see dochug() */
mtmp->mstrategy |= STRAT_ARRIVE;
xyloc = mtmp->xyloc;
xyflags = mtmp->xyflags;
xlocale = mtmp->xlocale;
ylocale = mtmp->ylocale;
for (otmp = mtmp->minvent; otmp; otmp = otmp->nobj)
set_obj_level(mtmp->dlevel, otmp);
if (mtmp == u.usteed)
return; /* don't place steed on the map */
if (with_you) {
/* When a monster accompanies you, sometimes it will arrive at your
intended destination and you'll end up next to that spot. This code
doesn't control the final outcome; goto_level(do.c) decides who ends
up at your target spot when there is a monster there too. */
if (!MON_AT(level, u.ux, u.uy) &&
!rn2(mtmp->mtame ? 10 : mtmp->mpeaceful ? 5 : 2))
rloc_to(mtmp, u.ux, u.uy);
else
mnexto(mtmp);
return;
}
/*
* The monster arrived on this level independently of the player.
* Its coordinate fields were overloaded for use as flags that
* specify its final destination.
*/
if (mtmp->mlstmv < moves - 1L) {
/* heal monster for time spent in limbo */
long nmv = moves - 1L - mtmp->mlstmv;
mon_catchup_elapsed_time(mtmp, nmv);
mtmp->mlstmv = moves - 1L;
/* let monster move a bit on new level (see placement code below) */
wander = (xchar) min(nmv, 8);
} else
wander = 0;
switch (xyloc) {
case MIGR_APPROX_XY: /* {x,y}locale set above */
break;
case MIGR_EXACT_XY:
wander = 0;
break;
case MIGR_NEAR_PLAYER:
xlocale = u.ux, ylocale = u.uy;
break;
case MIGR_STAIRS_UP:
xlocale = level->upstair.sx, ylocale = level->upstair.sy;
break;
case MIGR_STAIRS_DOWN:
xlocale = level->dnstair.sx, ylocale = level->dnstair.sy;
break;
case MIGR_LADDER_UP:
xlocale = level->upladder.sx, ylocale = level->upladder.sy;
break;
case MIGR_LADDER_DOWN:
xlocale = level->dnladder.sx, ylocale = level->dnladder.sy;
break;
case MIGR_SSTAIRS:
xlocale = level->sstairs.sx, ylocale = level->sstairs.sy;
break;
case MIGR_PORTAL:
if (In_endgame(&u.uz)) {
/* there is no arrival portal for endgame levels */
/* BUG[?]: for simplicity, this code relies on the fact that we
know that the current endgame levels always build upwards and
never have any exclusion subregion inside their TELEPORT_REGION
settings. */
xlocale =
rn1(level->updest.hx - level->updest.lx + 1, level->updest.lx);
ylocale =
rn1(level->updest.hy - level->updest.ly + 1, level->updest.ly);
break;
}
/* find the arrival portal */
for (t = level->lev_traps; t; t = t->ntrap)
if (t->ttyp == MAGIC_PORTAL)
break;
if (t) {
xlocale = t->tx, ylocale = t->ty;
break;
} else {
impossible("mon_arrive: no corresponding portal?");
}
/*FALLTHRU*/ default:
case MIGR_RANDOM:
xlocale = COLNO;
ylocale = ROWNO;
break;
}
if ((xlocale != COLNO) && wander) {
/* monster moved a bit; pick a nearby location */
/* mnearto() deals w/stone, et al */
char *r = in_rooms(level, xlocale, ylocale, 0);
if (r && *r) {
coord c;
/* somexy() handles irregular level->rooms */
if (somexy(level, &level->rooms[*r - ROOMOFFSET], &c, rng_main))
xlocale = c.x, ylocale = c.y;
else {
xlocale = COLNO;
ylocale = ROWNO;
}
} else { /* not in a room */
int i, j;
i = max(0, xlocale - wander);
j = min(COLNO - 1, xlocale + wander);
xlocale = rn1(j - i, i);
i = max(0, ylocale - wander);
j = min(ROWNO - 1, ylocale + wander);
ylocale = rn1(j - i, i);
}
}
/* moved a bit */
mtmp->mx = COLNO; /* (already is 0) */
mtmp->my = xyflags;
if (xlocale != COLNO)
mnearto(mtmp, xlocale, ylocale, FALSE);
else {
if (!rloc(mtmp, TRUE)) {
/* Failed to place migrating monster, probably because the level is
full. Dump the monster's cargo and leave the monster dead. */
struct obj *obj;
while ((obj = mtmp->minvent) != 0) {
obj_extract_self(obj);
obj_no_longer_held(obj);
if (obj->owornmask & W_MASK(os_wep))
setmnotwielded(mtmp, obj);
obj->owornmask = 0L;
if (xlocale != COLNO && ylocale != ROWNO)
place_object(obj, level, xlocale, ylocale);
else {
rloco(obj);
get_obj_location(obj, &xlocale, &ylocale, 0);
}
}
mkcorpstat(CORPSE, NULL, mtmp->data, level, xlocale, ylocale,
FALSE, rng_main);
mongone(mtmp);
}
}
mtmp->mux = COLNO;
mtmp->muy = ROWNO;
}