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/* SCCS Id: @(#)dogmove.c 3.4 2002/09/10 */
/* Copyright (c) Stichting Mathematisch Centrum, Amsterdam, 1985. */
/* NetHack may be freely redistributed. See license for details. */
#include "hack.h"
#include "mfndpos.h"
#include "edog.h"
extern boolean notonhead;
#ifdef OVL0
STATIC_DCL boolean FDECL(dog_hunger,(struct monst *,struct edog *));
STATIC_DCL int FDECL(dog_invent,(struct monst *,struct edog *,int));
STATIC_DCL int FDECL(dog_goal,(struct monst *,struct edog *,int,int,int));
STATIC_DCL struct obj *FDECL(DROPPABLES, (struct monst *));
STATIC_DCL boolean FDECL(can_reach_location,(struct monst *,XCHAR_P,XCHAR_P,
XCHAR_P,XCHAR_P));
STATIC_DCL boolean FDECL(could_reach_item,(struct monst *, XCHAR_P,XCHAR_P));
STATIC_OVL struct obj *
DROPPABLES(mon)
register struct monst *mon;
{
register struct obj *obj;
struct obj *wep = MON_WEP(mon);
boolean item1 = FALSE, item2 = FALSE;
if (is_animal(mon->data) || mindless(mon->data))
item1 = item2 = TRUE;
if (!tunnels(mon->data) || !needspick(mon->data))
item1 = TRUE;
for(obj = mon->minvent; obj; obj = obj->nobj) {
if (!item1 && is_pick(obj) && (obj->otyp != DWARVISH_MATTOCK
|| !which_armor(mon, W_ARMS))) {
item1 = TRUE;
continue;
}
if (!item2 && obj->otyp == UNICORN_HORN && !obj->cursed) {
item2 = TRUE;
continue;
}
if (!obj->owornmask && obj != wep) return obj;
}
return (struct obj *)0;
}
static NEARDATA const char nofetch[] = { BALL_CLASS, CHAIN_CLASS, ROCK_CLASS, 0 };
#endif /* OVL0 */
STATIC_OVL boolean FDECL(cursed_object_at, (int, int));
STATIC_VAR xchar gtyp, gx, gy; /* type and position of dog's current goal */
STATIC_PTR void FDECL(wantdoor, (int, int, genericptr_t));
#ifdef OVLB
STATIC_OVL boolean
cursed_object_at(x, y)
int x, y;
{
struct obj *otmp;
for(otmp = level.objects[x][y]; otmp; otmp = otmp->nexthere)
if (otmp->cursed) return TRUE;
return FALSE;
}
int
dog_nutrition(mtmp, obj)
struct monst *mtmp;
struct obj *obj;
{
int nutrit;
/*
* It is arbitrary that the pet takes the same length of time to eat
* as a human, but gets more nutritional value.
*/
if (obj->oclass == FOOD_CLASS) {
if(obj->otyp == CORPSE) {
mtmp->meating = 3 + (mons[obj->corpsenm].cwt >> 6);
nutrit = mons[obj->corpsenm].cnutrit;
} else {
mtmp->meating = objects[obj->otyp].oc_delay;
nutrit = objects[obj->otyp].oc_nutrition;
}
switch(mtmp->data->msize) {
case MZ_TINY: nutrit *= 8; break;
case MZ_SMALL: nutrit *= 6; break;
default:
case MZ_MEDIUM: nutrit *= 5; break;
case MZ_LARGE: nutrit *= 4; break;
case MZ_HUGE: nutrit *= 3; break;
case MZ_GIGANTIC: nutrit *= 2; break;
}
if(obj->oeaten) {
mtmp->meating = eaten_stat(mtmp->meating, obj);
nutrit = eaten_stat(nutrit, obj);
}
} else if (obj->oclass == COIN_CLASS) {
mtmp->meating = (int)(obj->quan/2000) + 1;
if (mtmp->meating < 0) mtmp->meating = 1;
nutrit = (int)(obj->quan/20);
if (nutrit < 0) nutrit = 0;
} else {
/* Unusual pet such as gelatinous cube eating odd stuff.
* meating made consistent with wild monsters in mon.c.
* nutrit made consistent with polymorphed player nutrit in
* eat.c. (This also applies to pets eating gold.)
*/
mtmp->meating = obj->owt/20 + 1;
nutrit = 5*objects[obj->otyp].oc_nutrition;
}
return nutrit;
}
/* returns 2 if pet dies, otherwise 1 */
int
dog_eat(mtmp, obj, x, y, devour)
register struct monst *mtmp;
register struct obj * obj;
int x, y;
boolean devour;
{
register struct edog *edog = EDOG(mtmp);
boolean poly = FALSE, grow = FALSE, heal = FALSE;
int nutrit;
if(edog->hungrytime < monstermoves)
edog->hungrytime = monstermoves;
nutrit = dog_nutrition(mtmp, obj);
poly = polyfodder(obj);
grow = mlevelgain(obj);
heal = mhealup(obj);
if (devour) {
if (mtmp->meating > 1) mtmp->meating /= 2;
if (nutrit > 1) nutrit = (nutrit * 3) / 4;
}
edog->hungrytime += nutrit;
mtmp->mconf = 0;
if (edog->mhpmax_penalty) {
/* no longer starving */
mtmp->mhpmax += edog->mhpmax_penalty;
edog->mhpmax_penalty = 0;
}
if (mtmp->mflee && mtmp->mfleetim > 1) mtmp->mfleetim /= 2;
if (mtmp->mtame < 20) mtmp->mtame++;
if (x != mtmp->mx || y != mtmp->my) { /* moved & ate on same turn */
newsym(x, y);
newsym(mtmp->mx, mtmp->my);
}
if (is_pool(x, y) && !Underwater) {
/* Don't print obj */
/* TODO: Reveal presence of sea monster (especially sharks) */
} else
/* hack: observe the action if either new or old location is in view */
/* However, invisible monsters should still be "it" even though out of
sight locations should not. */
if (cansee(x, y) || cansee(mtmp->mx, mtmp->my))
pline("%s %s %s.", mon_visible(mtmp) ? noit_Monnam(mtmp) : "It",
devour ? "devours" : "eats",
(obj->oclass == FOOD_CLASS) ?
singular(obj, doname) : doname(obj));
/* It's a reward if it's DOGFOOD and the player dropped/threw it. */
/* We know the player had it if invlet is set -dlc */
if(dogfood(mtmp,obj) == DOGFOOD && obj->invlet)
#ifdef LINT
edog->apport = 0;
#else
edog->apport += (int)(200L/
((long)edog->dropdist + monstermoves - edog->droptime));
#endif
if (mtmp->data == &mons[PM_RUST_MONSTER] && obj->oerodeproof) {
/* The object's rustproofing is gone now */
obj->oerodeproof = 0;
mtmp->mstun = 1;
if (canseemon(mtmp) && flags.verbose) {
pline("%s spits %s out in disgust!",
Monnam(mtmp), distant_name(obj,doname));
}
} else if (obj == uball) {
unpunish();
delobj(obj);
} else if (obj == uchain)
unpunish();
else if (obj->quan > 1L && obj->oclass == FOOD_CLASS) {
obj->quan--;
obj->owt = weight(obj);
} else
delobj(obj);
if (poly) {
(void) newcham(mtmp, (struct permonst *)0, FALSE,
cansee(mtmp->mx, mtmp->my));
}
/* limit "instant" growth to prevent potential abuse */
if (grow && (int) mtmp->m_lev < (int)mtmp->data->mlevel + 15) {
if (!grow_up(mtmp, (struct monst *)0)) return 2;
}
if (heal) mtmp->mhp = mtmp->mhpmax;
return 1;
}
#endif /* OVLB */
#ifdef OVL0
/* hunger effects -- returns TRUE on starvation */
STATIC_OVL boolean
dog_hunger(mtmp, edog)
register struct monst *mtmp;
register struct edog *edog;
{
if (monstermoves > edog->hungrytime + 500) {
if (!carnivorous(mtmp->data) && !herbivorous(mtmp->data)) {
edog->hungrytime = monstermoves + 500;
/* but not too high; it might polymorph */
} else if (!edog->mhpmax_penalty) {
/* starving pets are limited in healing */
int newmhpmax = mtmp->mhpmax / 3;
mtmp->mconf = 1;
edog->mhpmax_penalty = mtmp->mhpmax - newmhpmax;
mtmp->mhpmax = newmhpmax;
if (mtmp->mhp > mtmp->mhpmax)
mtmp->mhp = mtmp->mhpmax;
if (mtmp->mhp < 1) goto dog_died;
if (cansee(mtmp->mx, mtmp->my))
pline("%s is confused from hunger.", Monnam(mtmp));
else if (couldsee(mtmp->mx, mtmp->my))
beg(mtmp);
else
You_feel("worried about %s.", y_monnam(mtmp));
stop_occupation();
} else if (monstermoves > edog->hungrytime + 750 || mtmp->mhp < 1) {
dog_died:
if (mtmp->mleashed
#ifdef STEED
&& mtmp != u.usteed
#endif
)
Your("leash goes slack.");
else if (cansee(mtmp->mx, mtmp->my))
pline("%s starves.", Monnam(mtmp));
else
You_feel("%s for a moment.",
Hallucination ? "bummed" : "sad");
mondied(mtmp);
return(TRUE);
}
}
return(FALSE);
}
/* do something with object (drop, pick up, eat) at current position
* returns 1 if object eaten (since that counts as dog's move), 2 if died
*/
STATIC_OVL int
dog_invent(mtmp, edog, udist)
register struct monst *mtmp;
register struct edog *edog;
int udist;
{
register int omx, omy;
struct obj *obj;
if (mtmp->msleeping || !mtmp->mcanmove) return(0);
omx = mtmp->mx;
omy = mtmp->my;
/* if we are carrying sth then we drop it (perhaps near @) */
/* Note: if apport == 1 then our behaviour is independent of udist */
/* Use udist+1 so steed won't cause divide by zero */
#ifndef GOLDOBJ
if(DROPPABLES(mtmp) || mtmp->mgold) {
#else
if(DROPPABLES(mtmp)) {
#endif
if (!rn2(udist+1) || !rn2(edog->apport))
if(rn2(10) < edog->apport){
relobj(mtmp, (int)mtmp->minvis, TRUE);
if(edog->apport > 1) edog->apport--;
edog->dropdist = udist; /* hpscdi!jon */
edog->droptime = monstermoves;
}
} else {
if((obj=level.objects[omx][omy]) && !index(nofetch,obj->oclass)
#ifdef MAIL
&& obj->otyp != SCR_MAIL
#endif
){
int edible = dogfood(mtmp, obj);
if ((edible <= CADAVER ||
/* starving pet is more aggressive about eating */
(edog->mhpmax_penalty && edible == ACCFOOD)) &&
could_reach_item(mtmp, obj->ox, obj->oy))
return dog_eat(mtmp, obj, omx, omy, FALSE);
if(can_carry(mtmp, obj) && !obj->cursed &&
could_reach_item(mtmp, obj->ox, obj->oy)) {
if(rn2(20) < edog->apport+3) {
if (rn2(udist) || !rn2(edog->apport)) {
if (cansee(omx, omy) && flags.verbose)
pline("%s picks up %s.", Monnam(mtmp),
distant_name(obj, doname));
obj_extract_self(obj);
newsym(omx,omy);
(void) mpickobj(mtmp,obj);
if (attacktype(mtmp->data, AT_WEAP) &&
mtmp->weapon_check == NEED_WEAPON) {
mtmp->weapon_check = NEED_HTH_WEAPON;
(void) mon_wield_item(mtmp);
}
m_dowear(mtmp, FALSE);
}
}
}
}
}
return 0;
}
/* set dog's goal -- gtyp, gx, gy
* returns -1/0/1 (dog's desire to approach player) or -2 (abort move)
*/
STATIC_OVL int
dog_goal(mtmp, edog, after, udist, whappr)
register struct monst *mtmp;
struct edog *edog;
int after, udist, whappr;
{
register int omx, omy;
boolean in_masters_sight, dog_has_minvent;
register struct obj *obj;
xchar otyp;
int appr;
#ifdef STEED
/* Steeds don't move on their own will */
if (mtmp == u.usteed)
return (-2);
#endif
omx = mtmp->mx;
omy = mtmp->my;
in_masters_sight = couldsee(omx, omy);
dog_has_minvent = (DROPPABLES(mtmp) != 0);
if (!edog || mtmp->mleashed) { /* he's not going anywhere... */
gtyp = APPORT;
gx = u.ux;
gy = u.uy;
} else {
#define DDIST(x,y) (dist2(x,y,omx,omy))
#define SQSRCHRADIUS 5
int min_x, max_x, min_y, max_y;
register int nx, ny;
gtyp = UNDEF; /* no goal as yet */
gx = gy = 0; /* suppress 'used before set' message */
if ((min_x = omx - SQSRCHRADIUS) < 1) min_x = 1;
if ((max_x = omx + SQSRCHRADIUS) >= COLNO) max_x = COLNO - 1;
if ((min_y = omy - SQSRCHRADIUS) < 0) min_y = 0;
if ((max_y = omy + SQSRCHRADIUS) >= ROWNO) max_y = ROWNO - 1;
/* nearby food is the first choice, then other objects */
for (obj = fobj; obj; obj = obj->nobj) {
nx = obj->ox;
ny = obj->oy;
if (nx >= min_x && nx <= max_x && ny >= min_y && ny <= max_y) {
otyp = dogfood(mtmp, obj);
/* skip inferior goals */
if (otyp > gtyp || otyp == UNDEF)
continue;
/* avoid cursed items unless starving */
if (cursed_object_at(nx, ny) &&
!(edog->mhpmax_penalty && otyp < MANFOOD))
continue;
/* skip completely unreacheable goals */
if (!could_reach_item(mtmp, nx, ny) ||
!can_reach_location(mtmp, mtmp->mx, mtmp->my, nx, ny))
continue;
if (otyp < MANFOOD) {
if (otyp < gtyp || DDIST(nx,ny) < DDIST(gx,gy)) {
gx = nx;
gy = ny;
gtyp = otyp;
}
} else if(gtyp == UNDEF && in_masters_sight &&
!dog_has_minvent &&
(!levl[omx][omy].lit || levl[u.ux][u.uy].lit) &&
(otyp == MANFOOD || m_cansee(mtmp, nx, ny)) &&
edog->apport > rn2(8) &&
can_carry(mtmp,obj)) {
gx = nx;
gy = ny;
gtyp = APPORT;
}
}
}
}
/* follow player if appropriate */
if (gtyp == UNDEF ||
(gtyp != DOGFOOD && gtyp != APPORT && monstermoves < edog->hungrytime)) {
gx = u.ux;
gy = u.uy;
if (after && udist <= 4 && gx == u.ux && gy == u.uy)
return(-2);
appr = (udist >= 9) ? 1 : (mtmp->mflee) ? -1 : 0;
if (udist > 1) {
if (!IS_ROOM(levl[u.ux][u.uy].typ) || !rn2(4) ||
whappr ||
(dog_has_minvent && rn2(edog->apport)))
appr = 1;
}
/* if you have dog food it'll follow you more closely */
if (appr == 0) {
obj = invent;
while (obj) {
if(dogfood(mtmp, obj) == DOGFOOD) {
appr = 1;
break;
}
obj = obj->nobj;
}
}
} else
appr = 1; /* gtyp != UNDEF */
if(mtmp->mconf)
appr = 0;
#define FARAWAY (COLNO + 2) /* position outside screen */
if (gx == u.ux && gy == u.uy && !in_masters_sight) {
register coord *cp;
cp = gettrack(omx,omy);
if (cp) {
gx = cp->x;
gy = cp->y;
if(edog) edog->ogoal.x = 0;
} else {
/* assume master hasn't moved far, and reuse previous goal */
if(edog && edog->ogoal.x &&
((edog->ogoal.x != omx) || (edog->ogoal.y != omy))) {
gx = edog->ogoal.x;
gy = edog->ogoal.y;
edog->ogoal.x = 0;
} else {
int fardist = FARAWAY * FARAWAY;
gx = gy = FARAWAY; /* random */
do_clear_area(omx, omy, 9, wantdoor,
(genericptr_t)&fardist);
/* here gx == FARAWAY e.g. when dog is in a vault */
if (gx == FARAWAY || (gx == omx && gy == omy)) {
gx = u.ux;
gy = u.uy;
} else if(edog) {
edog->ogoal.x = gx;
edog->ogoal.y = gy;
}
}
}
} else if(edog) {
edog->ogoal.x = 0;
}
return appr;
}
/* return 0 (no move), 1 (move) or 2 (dead) */
int
dog_move(mtmp, after)
register struct monst *mtmp;
register int after; /* this is extra fast monster movement */
{
int omx, omy; /* original mtmp position */
int appr, whappr, udist;
int i, j, k;
register struct edog *edog = EDOG(mtmp);
struct obj *obj = (struct obj *) 0;
xchar otyp;
boolean has_edog, cursemsg[9], do_eat = FALSE;
xchar nix, niy; /* position mtmp is (considering) moving to */
register int nx, ny; /* temporary coordinates */
xchar cnt, uncursedcnt, chcnt;
int chi = -1, nidist, ndist;
coord poss[9];
long info[9], allowflags;
#define GDIST(x,y) (dist2(x,y,gx,gy))
/*
* Tame Angels have isminion set and an ispriest structure instead of
* an edog structure. Fortunately, guardian Angels need not worry
* about mundane things like eating and fetching objects, and can
* spend all their energy defending the player. (They are the only
* monsters with other structures that can be tame.)
*/
has_edog = !mtmp->isminion;
omx = mtmp->mx;
omy = mtmp->my;
if (has_edog && dog_hunger(mtmp, edog)) return(2); /* starved */
udist = distu(omx,omy);
#ifdef STEED
/* Let steeds eat and maybe throw rider during Conflict */
if (mtmp == u.usteed) {
if (Conflict && !resist(mtmp, RING_CLASS, 0, 0)) {
dismount_steed(DISMOUNT_THROWN);
return (1);
}
udist = 1;
} else
#endif
/* maybe we tamed him while being swallowed --jgm */
if (!udist) return(0);
nix = omx; /* set before newdogpos */
niy = omy;
cursemsg[0] = FALSE; /* lint suppression */
info[0] = 0; /* ditto */
if (has_edog) {
j = dog_invent(mtmp, edog, udist);
if (j == 2) return 2; /* died */
else if (j == 1) goto newdogpos; /* eating something */
whappr = (monstermoves - edog->whistletime < 5);
} else
whappr = 0;
appr = dog_goal(mtmp, has_edog ? edog : (struct edog *)0,
after, udist, whappr);
if (appr == -2) return(0);
allowflags = ALLOW_M | ALLOW_TRAPS | ALLOW_SSM | ALLOW_SANCT;
if (passes_walls(mtmp->data)) allowflags |= (ALLOW_ROCK | ALLOW_WALL);
if (passes_bars(mtmp->data)) allowflags |= ALLOW_BARS;
if (throws_rocks(mtmp->data)) allowflags |= ALLOW_ROCK;
if (Conflict && !resist(mtmp, RING_CLASS, 0, 0)) {
allowflags |= ALLOW_U;
if (!has_edog) {
coord mm;
/* Guardian angel refuses to be conflicted; rather,
* it disappears, angrily, and sends in some nasties
*/
if (canspotmon(mtmp)) {
pline("%s rebukes you, saying:", Monnam(mtmp));
verbalize("Since you desire conflict, have some more!");
}
mongone(mtmp);
i = rnd(4);
while(i--) {
mm.x = u.ux;
mm.y = u.uy;
if(enexto(&mm, mm.x, mm.y, &mons[PM_ANGEL]))
(void) mk_roamer(&mons[PM_ANGEL], u.ualign.type,
mm.x, mm.y, FALSE);
}
return(2);
}
}
if (!Conflict && !mtmp->mconf &&
mtmp == u.ustuck && !sticks(youmonst.data)) {
unstuck(mtmp); /* swallowed case handled above */
You("get released!");
}
if (!nohands(mtmp->data) && !verysmall(mtmp->data)) {
allowflags |= OPENDOOR;
if (m_carrying(mtmp, SKELETON_KEY)) allowflags |= BUSTDOOR;
}
if (is_giant(mtmp->data)) allowflags |= BUSTDOOR;
if (tunnels(mtmp->data)) allowflags |= ALLOW_DIG;
cnt = mfndpos(mtmp, poss, info, allowflags);
/* Normally dogs don't step on cursed items, but if they have no
* other choice they will. This requires checking ahead of time
* to see how many uncursed item squares are around.
*/
uncursedcnt = 0;
for (i = 0; i < cnt; i++) {
nx = poss[i].x; ny = poss[i].y;
if (MON_AT(nx,ny) && !(info[i] & ALLOW_M)) continue;
if (cursed_object_at(nx, ny)) continue;
uncursedcnt++;
}
chcnt = 0;
chi = -1;
nidist = GDIST(nix,niy);
for (i = 0; i < cnt; i++) {
nx = poss[i].x;
ny = poss[i].y;
cursemsg[i] = FALSE;
/* if leashed, we drag him along. */
if (mtmp->mleashed && distu(nx, ny) > 4) continue;
/* if a guardian, try to stay close by choice */
if (!has_edog &&
(j = distu(nx, ny)) > 16 && j >= udist) continue;
if ((info[i] & ALLOW_M) && MON_AT(nx, ny)) {
int mstatus;
register struct monst *mtmp2 = m_at(nx,ny);
if ((int)mtmp2->m_lev >= (int)mtmp->m_lev+2 ||
(mtmp2->data == &mons[PM_FLOATING_EYE] && rn2(10) &&
mtmp->mcansee && haseyes(mtmp->data) && mtmp2->mcansee
&& (perceives(mtmp->data) || !mtmp2->minvis)) ||
(mtmp2->data==&mons[PM_GELATINOUS_CUBE] && rn2(10)) ||
(max_passive_dmg(mtmp2, mtmp) >= mtmp->mhp) ||
((mtmp->mhp*4 < mtmp->mhpmax
|| mtmp2->data->msound == MS_GUARDIAN
|| mtmp2->data->msound == MS_LEADER) &&
mtmp2->mpeaceful && !Conflict) ||
(touch_petrifies(mtmp2->data) &&
!resists_ston(mtmp)))
continue;
if (after) return(0); /* hit only once each move */
notonhead = 0;
mstatus = mattackm(mtmp, mtmp2);
/* aggressor (pet) died */
if (mstatus & MM_AGR_DIED) return 2;
if ((mstatus & MM_HIT) && !(mstatus & MM_DEF_DIED) &&
rn2(4) && mtmp2->mlstmv != monstermoves &&
!onscary(mtmp->mx, mtmp->my, mtmp2) &&
/* monnear check needed: long worms hit on tail */
monnear(mtmp2, mtmp->mx, mtmp->my)) {
mstatus = mattackm(mtmp2, mtmp); /* return attack */
if (mstatus & MM_DEF_DIED) return 2;
}
return 0;
}
{ /* Dog avoids harmful traps, but perhaps it has to pass one
* in order to follow player. (Non-harmful traps do not
* have ALLOW_TRAPS in info[].) The dog only avoids the
* trap if you've seen it, unlike enemies who avoid traps
* if they've seen some trap of that type sometime in the
* past. (Neither behavior is really realistic.)
*/
struct trap *trap;
if ((info[i] & ALLOW_TRAPS) && (trap = t_at(nx,ny))) {
if (mtmp->mleashed) {
if (flags.soundok) whimper(mtmp);
} else
/* 1/40 chance of stepping on it anyway, in case
* it has to pass one to follow the player...
*/
if (trap->tseen && rn2(40)) continue;
}
}
/* dog eschews cursed objects, but likes dog food */
/* (minion isn't interested; `cursemsg' stays FALSE) */
if (has_edog)
for (obj = level.objects[nx][ny]; obj; obj = obj->nexthere) {
if (obj->cursed) cursemsg[i] = TRUE;
else if ((otyp = dogfood(mtmp, obj)) < MANFOOD &&
(otyp < ACCFOOD || edog->hungrytime <= monstermoves)) {
/* Note: our dog likes the food so much that he
* might eat it even when it conceals a cursed object */
nix = nx;
niy = ny;
chi = i;
do_eat = TRUE;
cursemsg[i] = FALSE; /* not reluctant */
goto newdogpos;
}
}
/* didn't find something to eat; if we saw a cursed item and
aren't being forced to walk on it, usually keep looking */
if (cursemsg[i] && !mtmp->mleashed && uncursedcnt > 0 &&
rn2(13 * uncursedcnt)) continue;
/* lessen the chance of backtracking to previous position(s) */
k = has_edog ? uncursedcnt : cnt;
for (j = 0; j < MTSZ && j < k - 1; j++)
if (nx == mtmp->mtrack[j].x && ny == mtmp->mtrack[j].y)
if (rn2(MTSZ * (k - j))) goto nxti;
j = ((ndist = GDIST(nx,ny)) - nidist) * appr;
if ((j == 0 && !rn2(++chcnt)) || j < 0 ||
(j > 0 && !whappr &&
((omx == nix && omy == niy && !rn2(3))
|| !rn2(12))
)) {
nix = nx;
niy = ny;
nidist = ndist;
if(j < 0) chcnt = 0;
chi = i;
}
nxti: ;
}
newdogpos:
if (nix != omx || niy != omy) {
struct obj *mw_tmp;
if (info[chi] & ALLOW_U) {
if (mtmp->mleashed) { /* play it safe */
pline("%s breaks loose of %s leash!",
Monnam(mtmp), mhis(mtmp));
m_unleash(mtmp, FALSE);
}
(void) mattacku(mtmp);
return(0);
}
if (!m_in_out_region(mtmp, nix, niy))
return 1;
if (((IS_ROCK(levl[nix][niy].typ) && may_dig(nix,niy)) ||
closed_door(nix, niy)) &&
mtmp->weapon_check != NO_WEAPON_WANTED &&
tunnels(mtmp->data) && needspick(mtmp->data)) {
if (closed_door(nix, niy)) {
if (!(mw_tmp = MON_WEP(mtmp)) ||
!is_pick(mw_tmp) || !is_axe(mw_tmp))
mtmp->weapon_check = NEED_PICK_OR_AXE;
} else if (IS_TREE(levl[nix][niy].typ)) {
if (!(mw_tmp = MON_WEP(mtmp)) || !is_axe(mw_tmp))
mtmp->weapon_check = NEED_AXE;
} else if (!(mw_tmp = MON_WEP(mtmp)) || !is_pick(mw_tmp)) {
mtmp->weapon_check = NEED_PICK_AXE;
}
if (mtmp->weapon_check >= NEED_PICK_AXE &&
mon_wield_item(mtmp))
return 0;
}
/* insert a worm_move() if worms ever begin to eat things */
remove_monster(omx, omy);
place_monster(mtmp, nix, niy);
if (cursemsg[chi] && (cansee(omx,omy) || cansee(nix,niy)))
pline("%s moves only reluctantly.", Monnam(mtmp));
for (j=MTSZ-1; j>0; j--) mtmp->mtrack[j] = mtmp->mtrack[j-1];
mtmp->mtrack[0].x = omx;
mtmp->mtrack[0].y = omy;
/* We have to know if the pet's gonna do a combined eat and
* move before moving it, but it can't eat until after being
* moved. Thus the do_eat flag.
*/
if (do_eat) {
if (dog_eat(mtmp, obj, omx, omy, FALSE) == 2) return 2;
}
} else if (mtmp->mleashed && distu(omx, omy) > 4) {
/* an incredible kludge, but the only way to keep pooch near
* after it spends time eating or in a trap, etc.
*/
coord cc;
nx = sgn(omx - u.ux);
ny = sgn(omy - u.uy);
cc.x = u.ux + nx;
cc.y = u.uy + ny;
if (goodpos(cc.x, cc.y, mtmp, 0)) goto dognext;
i = xytod(nx, ny);
for (j = (i + 7)%8; j < (i + 1)%8; j++) {
dtoxy(&cc, j);
if (goodpos(cc.x, cc.y, mtmp, 0)) goto dognext;
}
for (j = (i + 6)%8; j < (i + 2)%8; j++) {
dtoxy(&cc, j);
if (goodpos(cc.x, cc.y, mtmp, 0)) goto dognext;
}
cc.x = mtmp->mx;
cc.y = mtmp->my;
dognext:
if (!m_in_out_region(mtmp, nix, niy))
return 1;
remove_monster(mtmp->mx, mtmp->my);
place_monster(mtmp, cc.x, cc.y);
newsym(cc.x,cc.y);
set_apparxy(mtmp);
}
return(1);
}
/* check if a monster could pick up objects from a location */
STATIC_OVL boolean
could_reach_item(mon, nx, ny)
struct monst *mon;
xchar nx, ny;
{
if ((!is_pool(nx,ny) || is_swimmer(mon->data)) &&
(!is_lava(nx,ny) || likes_lava(mon->data)) &&
(!sobj_at(BOULDER,nx,ny) || throws_rocks(mon->data)))
return TRUE;
return FALSE;
}
/* Hack to prevent a dog from being endlessly stuck near an object that
* it can't reach, such as caught in a teleport scroll niche. It recursively
* checks to see if the squares in between are good. The checking could be a
* little smarter; a full check would probably be useful in m_move() too.
* Since the maximum food distance is 5, this should never be more than 5 calls
* deep.
*/
STATIC_OVL boolean
can_reach_location(mon, mx, my, fx, fy)
struct monst *mon;
xchar mx, my, fx, fy;
{
int i, j;
int dist;
if (mx == fx && my == fy) return TRUE;
if (!isok(mx, my)) return FALSE; /* should not happen */
dist = dist2(mx, my, fx, fy);
for(i=mx-1; i<=mx+1; i++) {
for(j=my-1; j<=my+1; j++) {
if (!isok(i, j))
continue;
if (dist2(i, j, fx, fy) >= dist)
continue;
if (IS_ROCK(levl[i][j].typ) && !passes_walls(mon->data) &&
(!may_dig(i,j) || !tunnels(mon->data)))
continue;
if (IS_DOOR(levl[i][j].typ) &&
(levl[i][j].doormask & (D_CLOSED | D_LOCKED)))
continue;
if (!could_reach_item(mon, i, j))
continue;
if (can_reach_location(mon, i, j, fx, fy))
return TRUE;
}
}
return FALSE;
}
#endif /* OVL0 */
#ifdef OVLB
/*ARGSUSED*/ /* do_clear_area client */
STATIC_PTR void
wantdoor(x, y, distance)
int x, y;
genericptr_t distance;
{
int ndist;
if (*(int*)distance > (ndist = distu(x, y))) {
gx = x;
gy = y;
*(int*)distance = ndist;
}
}
#endif /* OVLB */
/*dogmove.c*/