games/hack/hack.dog.c

   1 /* Copyright (c) Stichting Mathematisch Centrum, Amsterdam, 1985. */
   2 /* hack.dog.c - version 1.0.3 */
   3 /* $FreeBSD: src/games/hack/hack.dog.c,v 1.3 1999/11/16 02:57:03 billf Exp $ */
   4
   5 #include "hack.h"
   6 #include "hack.mfndpos.h"
   7 #include "def.edog.h"
   8
   9 struct permonst li_dog =
  10         { "little dog", 'd', 2, 18, 6, 1, 6, sizeof(struct edog) };
  11 struct permonst dog =
  12         { "dog", 'd', 4, 16, 5, 1, 6, sizeof(struct edog) };
  13 struct permonst la_dog =
  14         { "large dog", 'd', 6, 15, 4, 2, 4, sizeof(struct edog) };
  15
  16 static void initedog(struct monst *);
  17 static xchar dogfood(struct obj *);
  18
  19 void
  20 makedog(void)
  21 {
  22         struct monst *mtmp = makemon(&li_dog, u.ux, u.uy);
  23
  24         if (!mtmp)
  25                 return;         /* dogs were genocided */
  26         initedog(mtmp);
  27 }
  28
  29 static void
  30 initedog(struct monst *mtmp)
  31 {
  32         mtmp->mtame = mtmp->mpeaceful = 1;
  33         EDOG(mtmp)->hungrytime = 1000 + moves;
  34         EDOG(mtmp)->eattime = 0;
  35         EDOG(mtmp)->droptime = 0;
  36         EDOG(mtmp)->dropdist = 10000;
  37         EDOG(mtmp)->apport = 10;
  38         EDOG(mtmp)->whistletime = 0;
  39 }
  40
  41 /* attach the monsters that went down (or up) together with @ */
  42 struct monst *mydogs = NULL;
  43 struct monst *fallen_down = NULL;       /* monsters that fell through a trapdoor */
  44 /* they will appear on the next level @ goes to, even if he goes up! */
  45
  46 void
  47 losedogs(void)
  48 {
  49         struct monst *mtmp;
  50
  51         while ((mtmp = mydogs)) {
  52                 mydogs = mtmp->nmon;
  53                 mtmp->nmon = fmon;
  54                 fmon = mtmp;
  55                 mnexto(mtmp);
  56         }
  57         while ((mtmp = fallen_down)) {
  58                 fallen_down = mtmp->nmon;
  59                 mtmp->nmon = fmon;
  60                 fmon = mtmp;
  61                 rloc(mtmp);
  62         }
  63 }
  64
  65 void
  66 keepdogs(void)
  67 {
  68         struct monst *mtmp;
  69
  70         for (mtmp = fmon; mtmp; mtmp = mtmp->nmon)
  71                 if (dist(mtmp->mx, mtmp->my) < 3 && follower(mtmp)
  72                     && !mtmp->msleep && !mtmp->mfroz) {
  73                         relmon(mtmp);
  74                         mtmp->nmon = mydogs;
  75                         mydogs = mtmp;
  76                         unpmon(mtmp);
  77                         keepdogs();     /* we destroyed the link, so use recursion */
  78                         return;         /* (admittedly somewhat primitive) */
  79                 }
  80 }
  81
  82 void
  83 fall_down(struct monst *mtmp)
  84 {
  85         relmon(mtmp);
  86         mtmp->nmon = fallen_down;
  87         fallen_down = mtmp;
  88         unpmon(mtmp);
  89         mtmp->mtame = 0;
  90 }
  91
  92 /* return quality of food; the lower the better */
  93 #define DOGFOOD 0
  94 #define CADAVER 1
  95 #define ACCFOOD 2
  96 #define MANFOOD 3
  97 #define APPORT  4
  98 #define POISON  5
  99 #define UNDEF   6
 100
 101 static xchar
 102 dogfood(struct obj *obj)
 103 {
 104         switch (obj->olet) {
 105         case FOOD_SYM:
 106                 return (
 107                     (obj->otyp == TRIPE_RATION) ? DOGFOOD :
 108                     (obj->otyp < CARROT) ? ACCFOOD :
 109                     (obj->otyp < CORPSE) ? MANFOOD :
 110                     (poisonous(obj) || obj->age + 50 <= moves ||
 111                         obj->otyp == DEAD_COCKATRICE)
 112                     ? POISON : CADAVER
 113                     );
 114         default:
 115                 if (!obj->cursed)
 116                         return (APPORT);
 117         /* fall into next case */
 118         case BALL_SYM:
 119         case CHAIN_SYM:
 120         case ROCK_SYM:
 121                 return (UNDEF);
 122         }
 123 }
 124
 125 /* return 0 (no move), 1 (move) or 2 (dead) */
 126 int
 127 dog_move(struct monst *mtmp, int after)
 128 {
 129         int nx, ny, omx, omy, appr, nearer, j;
 130         int udist, chi = 0, i, whappr;
 131         struct monst *mtmp2;
 132         struct permonst *mdat = mtmp->data;
 133         struct edog *edog = EDOG(mtmp);
 134         struct obj *obj;
 135         struct trap *trap;
 136         xchar cnt, chcnt, nix, niy;
 137         schar dogroom, uroom;
 138         xchar gx, gy, gtyp, otyp;       /* current goal */
 139         coord poss[9];
 140         int info[9];
 141 #define GDIST(x, y) ((x - gx) * (x - gx) + (y - gy) * (y - gy))
 142 #define DDIST(x, y) ((x - omx) * (x - omx) + (y - omy) * (y - omy))
 143
 144         if (moves <= edog->eattime)     /* dog is still eating */
 145                 return (0);
 146         omx = mtmp->mx;
 147         omy = mtmp->my;
 148         whappr = (moves - EDOG(mtmp)->whistletime < 5);
 149         if (moves > edog->hungrytime + 500 && !mtmp->mconf) {
 150                 mtmp->mconf = 1;
 151                 mtmp->mhpmax /= 3;
 152                 if (mtmp->mhp > mtmp->mhpmax)
 153                         mtmp->mhp = mtmp->mhpmax;
 154                 if (cansee(omx, omy))
 155                         pline("%s is confused from hunger.", Monnam(mtmp));
 156                 else
 157                         pline("You feel worried about %s.", monnam(mtmp));
 158         } else if (moves > edog->hungrytime + 750 || mtmp->mhp < 1) {
 159                 if (cansee(omx, omy))
 160                         pline("%s dies from hunger.", Monnam(mtmp));
 161                 else
 162                         pline("You have a sad feeling for a moment, then it passes.");
 163                 mondied(mtmp);
 164                 return (2);
 165         }
 166         dogroom = inroom(omx, omy);
 167         uroom = inroom(u.ux, u.uy);
 168         udist = dist(omx, omy);
 169
 170         /* maybe we tamed him while being swallowed --jgm */
 171         if (!udist)
 172                 return (0);
 173
 174         /* if we are carrying sth then we drop it (perhaps near @) */
 175         /* Note: if apport == 1 then our behaviour is independent of udist */
 176         if (mtmp->minvent) {
 177                 if (!rn2(udist) || !rn2((int)edog->apport))
 178                         if (rn2(10) < (int)edog->apport) {
 179                                 relobj(mtmp, (int)mtmp->minvis);
 180                                 if (edog->apport > 1)
 181                                         edog->apport--;
 182                                 edog->dropdist = udist; /* hpscdi!jon */
 183                                 edog->droptime = moves;
 184                         }
 185         } else if ((obj = o_at(omx, omy))) {
 186                 if (!strchr("0_", obj->olet)) {
 187                         if ((otyp = dogfood(obj)) <= CADAVER) {
 188                                 nix = omx;
 189                                 niy = omy;
 190                                 goto eatobj;
 191                         }
 192                         if (obj->owt < 10 * mtmp->data->mlevel) {
 193                                 if (rn2(20) < (int)edog->apport + 3) {
 194                                         if (rn2(udist) ||
 195                                             !rn2((int)edog->apport)) {
 196                                                 freeobj(obj);
 197                                                 unpobj(obj);
 198                                                 /* if (levl[omx][omy].scrsym == obj->olet)
 199                                                  *      newsym(omx, omy); */
 200                                                 mpickobj(mtmp, obj);
 201                                         }
 202                                 }
 203                         }
 204                 }
 205         }
 206
 207         /* first we look for food */
 208         gtyp = UNDEF;           /* no goal as yet */
 209         gx = gy = 0;            /* suppress 'used before set' message */
 210         for (obj = fobj; obj; obj = obj->nobj) {
 211                 otyp = dogfood(obj);
 212                 if (otyp > gtyp || otyp == UNDEF)
 213                         continue;
 214                 if (inroom(obj->ox, obj->oy) != dogroom)
 215                         continue;
 216                 if (otyp < MANFOOD &&
 217                     (dogroom >= 0 || DDIST(obj->ox, obj->oy) < 10)) {
 218                         if (otyp < gtyp || (otyp == gtyp &&
 219                             DDIST(obj->ox, obj->oy) < DDIST(gx, gy))) {
 220                                 gx = obj->ox;
 221                                 gy = obj->oy;
 222                                 gtyp = otyp;
 223                         }
 224                 } else if (gtyp == UNDEF && dogroom >= 0 &&
 225                     uroom == dogroom &&
 226                     !mtmp->minvent && (int)edog->apport > rn2(8)) {
 227                         gx = obj->ox;
 228                         gy = obj->oy;
 229                         gtyp = APPORT;
 230                 }
 231         }
 232         if (gtyp == UNDEF ||
 233             (gtyp != DOGFOOD && gtyp != APPORT && moves < edog->hungrytime)) {
 234                 if (dogroom < 0 || dogroom == uroom) {
 235                         gx = u.ux;
 236                         gy = u.uy;
 237 #ifndef QUEST
 238                 } else {
 239                         int tmp = rooms[dogroom].fdoor;
 240                         cnt = rooms[dogroom].doorct;
 241
 242                         gx = gy = FAR;  /* random, far away */
 243                         while (cnt--) {
 244                                 if (dist(gx, gy) >
 245                                     dist(doors[tmp].x, doors[tmp].y)) {
 246                                         gx = doors[tmp].x;
 247                                         gy = doors[tmp].y;
 248                                 }
 249                                 tmp++;
 250                         }
 251                         /* here gx == FAR e.g. when dog is in a vault */
 252                         if (gx == FAR || (gx == omx && gy == omy)) {
 253                                 gx = u.ux;
 254                                 gy = u.uy;
 255                         }
 256 #endif /* QUEST */
 257                 }
 258                 appr = (udist >= 9) ? 1 : (mtmp->mflee) ? -1 : 0;
 259                 if (after && udist <= 4 && gx == u.ux && gy == u.uy)
 260                         return (0);
 261                 if (udist > 1) {
 262                         if (!IS_ROOM(levl[u.ux][u.uy].typ) || !rn2(4) ||
 263                             whappr ||
 264                             (mtmp->minvent && rn2((int)edog->apport)))
 265                                 appr = 1;
 266                 }
 267                 /* if you have dog food he'll follow you more closely */
 268                 if (appr == 0) {
 269                         obj = invent;
 270                         while (obj) {
 271                                 if (obj->otyp == TRIPE_RATION) {
 272                                         appr = 1;
 273                                         break;
 274                                 }
 275                                 obj = obj->nobj;
 276                         }
 277                 }
 278         } else          /* gtyp != UNDEF */
 279                 appr = 1;
 280         if (mtmp->mconf)
 281                 appr = 0;
 282
 283         if (gx == u.ux && gy == u.uy && (dogroom != uroom || dogroom < 0)) {
 284                 coord *cp;
 285                 cp = gettrack(omx, omy);
 286                 if (cp) {
 287                         gx = cp->x;
 288                         gy = cp->y;
 289                 }
 290         }
 291
 292         nix = omx;
 293         niy = omy;
 294         cnt = mfndpos(mtmp, poss, info, ALLOW_M | ALLOW_TRAPS);
 295         chcnt = 0;
 296         chi = -1;
 297         for (i = 0; i < cnt; i++) {
 298                 nx = poss[i].x;
 299                 ny = poss[i].y;
 300                 if (info[i] & ALLOW_M) {
 301                         mtmp2 = m_at(nx, ny);
 302                         if (mtmp2->data->mlevel >= mdat->mlevel + 2 ||
 303                             mtmp2->data->mlet == 'c')
 304                                 continue;
 305                         if (after)              /* hit only once each move */
 306                                 return (0);
 307
 308                         if (hitmm(mtmp, mtmp2) == 1 && rn2(4) &&
 309                             mtmp2->mlstmv != moves &&
 310                             hitmm(mtmp2, mtmp) == 2)
 311                                 return (2);
 312                         return (0);
 313                 }
 314
 315                 /* dog avoids traps */
 316                 /* but perhaps we have to pass a trap in order to follow @ */
 317                 if ((info[i] & ALLOW_TRAPS) && (trap = t_at(nx, ny))) {
 318                         if (!trap->tseen && rn2(40))
 319                                 continue;
 320                         if (rn2(10))
 321                                 continue;
 322                 }
 323
 324                 /* dog eschewes cursed objects */
 325                 /* but likes dog food */
 326                 obj = fobj;
 327                 while (obj) {
 328                         if (obj->ox != nx || obj->oy != ny)
 329                                 goto nextobj;
 330                         if (obj->cursed)
 331                                 goto nxti;
 332                         if (obj->olet == FOOD_SYM &&
 333                             (otyp = dogfood(obj)) < MANFOOD &&
 334                             (otyp < ACCFOOD || edog->hungrytime <= moves)) {
 335                                 /*
 336                                  * Note: our dog likes the food so much that
 337                                  * he might eat it even when it conceals a
 338                                  * cursed object
 339                                  */
 340                                 nix = nx;
 341                                 niy = ny;
 342                                 chi = i;
 343 eatobj:
 344                                 edog->eattime =
 345                                         moves + obj->quan *
 346                                         objects[obj->otyp].oc_delay;
 347                                 if (edog->hungrytime < moves)
 348                                         edog->hungrytime = moves;
 349                                 edog->hungrytime +=
 350                                         5 * obj->quan *
 351                                         objects[obj->otyp].nutrition;
 352                                 mtmp->mconf = 0;
 353                                 if (cansee(nix, niy))
 354                                         pline("%s ate %s.", Monnam(
 355                                                       mtmp), doname(obj));
 356                                 /* perhaps this was a reward */
 357                                 if (otyp != CADAVER)
 358                                         edog->apport += 200 /
 359                                                         (edog->dropdist +
 360                                                          moves - edog->droptime);
 361                                 delobj(obj);
 362                                 goto newdogpos;
 363                         }
 364 nextobj:
 365                         obj = obj->nobj;
 366                 }
 367
 368                 for (j = 0; j < MTSZ && j < cnt - 1; j++)
 369                         if (nx == mtmp->mtrack[j].x && ny == mtmp->mtrack[j].y)
 370                                 if (rn2(4 * (cnt - j)))
 371                                         goto nxti;
 372
 373 /* Some stupid C compilers cannot compute the whole expression at once. */
 374                 nearer = GDIST(nx, ny);
 375                 nearer -= GDIST(nix, niy);
 376                 nearer *= appr;
 377                 if ((nearer == 0 && !rn2(++chcnt)) || nearer < 0 ||
 378                     (nearer > 0 && !whappr &&
 379                      ((omx == nix && omy == niy && !rn2(3))
 380                       || !rn2(12))
 381                     )) {
 382                         nix = nx;
 383                         niy = ny;
 384                         if (nearer < 0)
 385                                 chcnt = 0;
 386                         chi = i;
 387                 }
 388 nxti:;
 389         }
 390 newdogpos:
 391         if (nix != omx || niy != omy) {
 392                 if (info[chi] & ALLOW_U) {
 393                         hitu(mtmp, d(mdat->damn, mdat->damd) + 1);
 394                         return (0);
 395                 }
 396                 mtmp->mx = nix;
 397                 mtmp->my = niy;
 398                 for (j = MTSZ - 1; j > 0; j--)
 399                         mtmp->mtrack[j] = mtmp->mtrack[j - 1];
 400                 mtmp->mtrack[0].x = omx;
 401                 mtmp->mtrack[0].y = omy;
 402         }
 403         if (mintrap(mtmp) == 2) /* he died */
 404                 return (2);
 405         pmon(mtmp);
 406         return (1);
 407 }
 408
 409 /* return roomnumber or -1 */
 410 int
 411 inroom(xchar x, xchar y)
 412 {
 413 #ifndef QUEST
 414         struct mkroom *croom = &rooms[0];
 415
 416         while (croom->hx >= 0) {
 417                 if (croom->hx >= x - 1 && croom->lx <= x + 1 &&
 418                     croom->hy >= y - 1 && croom->ly <= y + 1)
 419                         return (croom - rooms);
 420                 croom++;
 421         }
 422 #endif /* QUEST */
 423         return (-1);            /* not in room or on door */
 424 }
 425
 426 bool
 427 tamedog(struct monst *mtmp, struct obj *obj)
 428 {
 429         struct monst *mtmp2;
 430
 431         if (flags.moonphase == FULL_MOON && night() && rn2(6))
 432                 return (0);
 433
 434         /* If we cannot tame him, at least he's no longer afraid. */
 435         mtmp->mflee = 0;
 436         mtmp->mfleetim = 0;
 437         if (mtmp->mtame || mtmp->mfroz ||
 438 #ifndef NOWORM
 439             mtmp->wormno ||
 440 #endif /* NOWORM */
 441             mtmp->isshk || mtmp->isgd || strchr(" &@12", mtmp->data->mlet))
 442                 return (0);     /* no tame long worms? */
 443         if (obj) {
 444                 if (dogfood(obj) >= MANFOOD)
 445                         return (0);
 446                 if (cansee(mtmp->mx, mtmp->my))
 447                         pline("%s devours the %s.", Monnam(mtmp),
 448                               objects[obj->otyp].oc_name);
 449                 obfree(obj, NULL);
 450         }
 451         mtmp2 = newmonst(sizeof(struct edog) + mtmp->mnamelth);
 452         *mtmp2 = *mtmp;
 453         mtmp2->mxlth = sizeof(struct edog);
 454         if (mtmp->mnamelth)
 455                 strcpy(NAME(mtmp2), NAME(mtmp));
 456         initedog(mtmp2);
 457         replmon(mtmp, mtmp2);
 458         return (1);
 459 }