-
Notifications
You must be signed in to change notification settings - Fork 0
/
dogmove.c
867 lines (788 loc) · 24.4 KB
/
dogmove.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
/* 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*/