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 /* $DragonFly: src/games/hack/hack.dog.c,v 1.4 2006/08/21 19:45:32 pavalos Exp $ */
   5
   6 #include        "hack.h"
   7 #include        "hack.mfndpos.h"
   8 #include "def.edog.h"
   9
  10 struct permonst li_dog =
  11         { "little dog", 'd',2,18,6,1,6,sizeof(struct edog) };
  12 struct permonst dog =
  13         { "dog", 'd',4,16,5,1,6,sizeof(struct edog) };
  14 struct permonst la_dog =
  15         { "large dog", 'd',6,15,4,2,4,sizeof(struct edog) };
  16
  17 static void     initedog(struct monst *);
  18 static xchar    dogfood(struct obj *);
  19
  20 void
  21 makedog(void)
  22 {
  23 struct monst *mtmp = makemon(&li_dog,u.ux,u.uy);
  24         if(!mtmp) return; /* dogs were genocided */
  25         initedog(mtmp);
  26 }
  27
  28 static void
  29 initedog(struct monst *mtmp)
  30 {
  31         mtmp->mtame = mtmp->mpeaceful = 1;
  32         EDOG(mtmp)->hungrytime = 1000 + moves;
  33         EDOG(mtmp)->eattime = 0;
  34         EDOG(mtmp)->droptime = 0;
  35         EDOG(mtmp)->dropdist = 10000;
  36         EDOG(mtmp)->apport = 10;
  37         EDOG(mtmp)->whistletime = 0;
  38 }
  39
  40 /* attach the monsters that went down (or up) together with @ */
  41 struct monst *mydogs = 0;
  42 struct monst *fallen_down = 0;  /* monsters that fell through a trapdoor */
  43         /* they will appear on the next level @ goes to, even if he goes up! */
  44
  45 void
  46 losedogs(void)
  47 {
  48 struct monst *mtmp;
  49         while((mtmp = mydogs)){
  50                 mydogs = mtmp->nmon;
  51                 mtmp->nmon = fmon;
  52                 fmon = mtmp;
  53                 mnexto(mtmp);
  54         }
  55         while((mtmp = fallen_down)){
  56                 fallen_down = mtmp->nmon;
  57                 mtmp->nmon = fmon;
  58                 fmon = mtmp;
  59                 rloc(mtmp);
  60         }
  61 }
  62
  63 void
  64 keepdogs(void)
  65 {
  66 struct monst *mtmp;
  67         for(mtmp = fmon; mtmp; mtmp = mtmp->nmon)
  68             if(dist(mtmp->mx,mtmp->my) < 3 && follower(mtmp)
  69                 && !mtmp->msleep && !mtmp->mfroz) {
  70                 relmon(mtmp);
  71                 mtmp->nmon = mydogs;
  72                 mydogs = mtmp;
  73                 unpmon(mtmp);
  74                 keepdogs();     /* we destroyed the link, so use recursion */
  75                 return;         /* (admittedly somewhat primitive) */
  76         }
  77 }
  78
  79 void
  80 fall_down(struct monst *mtmp)
  81 {
  82         relmon(mtmp);
  83         mtmp->nmon = fallen_down;
  84         fallen_down = mtmp;
  85         unpmon(mtmp);
  86         mtmp->mtame = 0;
  87 }
  88
  89 /* return quality of food; the lower the better */
  90 #define DOGFOOD 0
  91 #define CADAVER 1
  92 #define ACCFOOD 2
  93 #define MANFOOD 3
  94 #define APPORT  4
  95 #define POISON  5
  96 #define UNDEF   6
  97 static xchar
  98 dogfood(struct obj *obj)
  99 {
 100         switch(obj->olet) {
 101         case FOOD_SYM:
 102             return(
 103                 (obj->otyp == TRIPE_RATION) ? DOGFOOD :
 104                 (obj->otyp < CARROT) ? ACCFOOD :
 105                 (obj->otyp < CORPSE) ? MANFOOD :
 106                 (poisonous(obj) || obj->age + 50 <= moves ||
 107                     obj->otyp == DEAD_COCKATRICE)
 108                         ? POISON : CADAVER
 109             );
 110         default:
 111             if(!obj->cursed) return(APPORT);
 112             /* fall into next case */
 113         case BALL_SYM:
 114         case CHAIN_SYM:
 115         case ROCK_SYM:
 116             return(UNDEF);
 117         }
 118 }
 119
 120 /* return 0 (no move), 1 (move) or 2 (dead) */
 121 int
 122 dog_move(struct monst *mtmp, int after)
 123 {
 124 int nx,ny,omx,omy,appr,nearer,j;
 125 int udist,chi = 0,i,whappr;
 126 struct monst *mtmp2;
 127 struct permonst *mdat = mtmp->data;
 128 struct edog *edog = EDOG(mtmp);
 129 struct obj *obj;
 130 struct trap *trap;
 131 xchar cnt,chcnt,nix,niy;
 132 schar dogroom,uroom;
 133 xchar gx,gy,gtyp,otyp;  /* current goal */
 134 coord poss[9];
 135 int info[9];
 136 #define GDIST(x,y) ((x-gx)*(x-gx) + (y-gy)*(y-gy))
 137 #define DDIST(x,y) ((x-omx)*(x-omx) + (y-omy)*(y-omy))
 138
 139         if(moves <= edog->eattime) return(0);   /* dog is still eating */
 140         omx = mtmp->mx;
 141         omy = mtmp->my;
 142         whappr = (moves - EDOG(mtmp)->whistletime < 5);
 143         if(moves > edog->hungrytime + 500 && !mtmp->mconf){
 144                 mtmp->mconf = 1;
 145                 mtmp->mhpmax /= 3;
 146                 if(mtmp->mhp > mtmp->mhpmax)
 147                         mtmp->mhp = mtmp->mhpmax;
 148                 if(cansee(omx,omy))
 149                         pline("%s is confused from hunger.", Monnam(mtmp));
 150                 else    pline("You feel worried about %s.", monnam(mtmp));
 151         } else
 152         if(moves > edog->hungrytime + 750 || mtmp->mhp < 1){
 153                 if(cansee(omx,omy))
 154                         pline("%s dies from hunger.", Monnam(mtmp));
 155                 else
 156                 pline("You have a sad feeling for a moment, then it passes.");
 157                 mondied(mtmp);
 158                 return(2);
 159         }
 160         dogroom = inroom(omx,omy);
 161         uroom = inroom(u.ux,u.uy);
 162         udist = dist(omx,omy);
 163
 164         /* maybe we tamed him while being swallowed --jgm */
 165         if(!udist) return(0);
 166
 167         /* if we are carrying sth then we drop it (perhaps near @) */
 168         /* Note: if apport == 1 then our behaviour is independent of udist */
 169         if(mtmp->minvent){
 170                 if(!rn2(udist) || !rn2((int) edog->apport))
 171                 if(rn2(10) < (int)edog->apport){
 172                         relobj(mtmp, (int) mtmp->minvis);
 173                         if(edog->apport > 1) edog->apport--;
 174                         edog->dropdist = udist;         /* hpscdi!jon */
 175                         edog->droptime = moves;
 176                 }
 177         } else {
 178                 if((obj = o_at(omx,omy))) if(!index("0_", obj->olet)){
 179                     if((otyp = dogfood(obj)) <= CADAVER){
 180                         nix = omx;
 181                         niy = omy;
 182                         goto eatobj;
 183                     }
 184                     if(obj->owt < 10*mtmp->data->mlevel)
 185                     if(rn2(20) < (int)edog->apport+3)
 186                     if(rn2(udist) || !rn2((int) edog->apport)){
 187                         freeobj(obj);
 188                         unpobj(obj);
 189                         /* if(levl[omx][omy].scrsym == obj->olet)
 190                                 newsym(omx,omy); */
 191                         mpickobj(mtmp,obj);
 192                     }
 193                 }
 194         }
 195
 196         /* first we look for food */
 197         gtyp = UNDEF;   /* no goal as yet */
 198         gx = gy = 0;    /* suppress 'used before set' message */
 199         for(obj = fobj; obj; obj = obj->nobj) {
 200                 otyp = dogfood(obj);
 201                 if(otyp > gtyp || otyp == UNDEF) continue;
 202                 if(inroom(obj->ox,obj->oy) != dogroom) continue;
 203                 if(otyp < MANFOOD &&
 204                  (dogroom >= 0 || DDIST(obj->ox,obj->oy) < 10)) {
 205                         if(otyp < gtyp || (otyp == gtyp &&
 206                                 DDIST(obj->ox,obj->oy) < DDIST(gx,gy))){
 207                                 gx = obj->ox;
 208                                 gy = obj->oy;
 209                                 gtyp = otyp;
 210                         }
 211                 } else
 212                 if(gtyp == UNDEF && dogroom >= 0 &&
 213                    uroom == dogroom &&
 214                    !mtmp->minvent && (int)edog->apport > rn2(8)){
 215                         gx = obj->ox;
 216                         gy = obj->oy;
 217                         gtyp = APPORT;
 218                 }
 219         }
 220         if(gtyp == UNDEF ||
 221           (gtyp != DOGFOOD && gtyp != APPORT && moves < edog->hungrytime)){
 222                 if(dogroom < 0 || dogroom == uroom){
 223                         gx = u.ux;
 224                         gy = u.uy;
 225 #ifndef QUEST
 226                 } else {
 227                         int tmp = rooms[dogroom].fdoor;
 228                             cnt = rooms[dogroom].doorct;
 229
 230                         gx = gy = FAR;  /* random, far away */
 231                         while(cnt--){
 232                             if(dist(gx,gy) >
 233                                 dist(doors[tmp].x, doors[tmp].y)){
 234                                         gx = doors[tmp].x;
 235                                         gy = doors[tmp].y;
 236                                 }
 237                                 tmp++;
 238                         }
 239                         /* here gx == FAR e.g. when dog is in a vault */
 240                         if(gx == FAR || (gx == omx && gy == omy)){
 241                                 gx = u.ux;
 242                                 gy = u.uy;
 243                         }
 244 #endif /* QUEST */
 245                 }
 246                 appr = (udist >= 9) ? 1 : (mtmp->mflee) ? -1 : 0;
 247                 if(after && udist <= 4 && gx == u.ux && gy == u.uy)
 248                         return(0);
 249                 if(udist > 1){
 250                         if(!IS_ROOM(levl[u.ux][u.uy].typ) || !rn2(4) ||
 251                            whappr ||
 252                            (mtmp->minvent && rn2((int) edog->apport)))
 253                                 appr = 1;
 254                 }
 255                 /* if you have dog food he'll follow you more closely */
 256                 if(appr == 0){
 257                         obj = invent;
 258                         while(obj){
 259                                 if(obj->otyp == TRIPE_RATION){
 260                                         appr = 1;
 261                                         break;
 262                                 }
 263                                 obj = obj->nobj;
 264                         }
 265                 }
 266         } else  appr = 1;       /* gtyp != UNDEF */
 267         if(mtmp->mconf) appr = 0;
 268
 269         if(gx == u.ux && gy == u.uy && (dogroom != uroom || dogroom < 0)){
 270         coord *cp;
 271                 cp = gettrack(omx,omy);
 272                 if(cp){
 273                         gx = cp->x;
 274                         gy = cp->y;
 275                 }
 276         }
 277
 278         nix = omx;
 279         niy = omy;
 280         cnt = mfndpos(mtmp,poss,info,ALLOW_M | ALLOW_TRAPS);
 281         chcnt = 0;
 282         chi = -1;
 283         for(i=0; i<cnt; i++){
 284                 nx = poss[i].x;
 285                 ny = poss[i].y;
 286                 if(info[i] & ALLOW_M){
 287                         mtmp2 = m_at(nx,ny);
 288                         if(mtmp2->data->mlevel >= mdat->mlevel+2 ||
 289                           mtmp2->data->mlet == 'c')
 290                                 continue;
 291                         if(after) return(0); /* hit only once each move */
 292
 293                         if(hitmm(mtmp, mtmp2) == 1 && rn2(4) &&
 294                           mtmp2->mlstmv != moves &&
 295                           hitmm(mtmp2,mtmp) == 2) return(2);
 296                         return(0);
 297                 }
 298
 299                 /* dog avoids traps */
 300                 /* but perhaps we have to pass a trap in order to follow @ */
 301                 if((info[i] & ALLOW_TRAPS) && (trap = t_at(nx,ny))){
 302                         if(!trap->tseen && rn2(40)) continue;
 303                         if(rn2(10)) continue;
 304                 }
 305
 306                 /* dog eschewes cursed objects */
 307                 /* but likes dog food */
 308                 obj = fobj;
 309                 while(obj){
 310                     if(obj->ox != nx || obj->oy != ny)
 311                         goto nextobj;
 312                     if(obj->cursed) goto nxti;
 313                     if(obj->olet == FOOD_SYM &&
 314                         (otyp = dogfood(obj)) < MANFOOD &&
 315                         (otyp < ACCFOOD || edog->hungrytime <= moves)){
 316                         /* Note: our dog likes the food so much that he
 317                         might eat it even when it conceals a cursed object */
 318                         nix = nx;
 319                         niy = ny;
 320                         chi = i;
 321                      eatobj:
 322                         edog->eattime =
 323                             moves + obj->quan * objects[obj->otyp].oc_delay;
 324                         if(edog->hungrytime < moves)
 325                             edog->hungrytime = moves;
 326                         edog->hungrytime +=
 327                             5*obj->quan * objects[obj->otyp].nutrition;
 328                         mtmp->mconf = 0;
 329                         if(cansee(nix,niy))
 330                             pline("%s ate %s.", Monnam(mtmp), doname(obj));
 331                         /* perhaps this was a reward */
 332                         if(otyp != CADAVER)
 333                         edog->apport += 200/(edog->dropdist+moves-edog->droptime);
 334                         delobj(obj);
 335                         goto newdogpos;
 336                     }
 337                 nextobj:
 338                     obj = obj->nobj;
 339                 }
 340
 341                 for(j=0; j<MTSZ && j<cnt-1; j++)
 342                         if(nx == mtmp->mtrack[j].x && ny == mtmp->mtrack[j].y)
 343                                 if(rn2(4*(cnt-j))) goto nxti;
 344
 345 /* Some stupid C compilers cannot compute the whole expression at once. */
 346                 nearer = GDIST(nx,ny);
 347                 nearer -= GDIST(nix,niy);
 348                 nearer *= appr;
 349                 if((nearer == 0 && !rn2(++chcnt)) || nearer<0 ||
 350                         (nearer > 0 && !whappr &&
 351                                 ((omx == nix && omy == niy && !rn2(3))
 352                                 || !rn2(12))
 353                         )){
 354                         nix = nx;
 355                         niy = ny;
 356                         if(nearer < 0) chcnt = 0;
 357                         chi = i;
 358                 }
 359         nxti:   ;
 360         }
 361 newdogpos:
 362         if(nix != omx || niy != omy){
 363                 if(info[chi] & ALLOW_U){
 364                         hitu(mtmp, d(mdat->damn, mdat->damd)+1);
 365                         return(0);
 366                 }
 367                 mtmp->mx = nix;
 368                 mtmp->my = niy;
 369                 for(j=MTSZ-1; j>0; j--) mtmp->mtrack[j] = mtmp->mtrack[j-1];
 370                 mtmp->mtrack[0].x = omx;
 371                 mtmp->mtrack[0].y = omy;
 372         }
 373         if(mintrap(mtmp) == 2)  /* he died */
 374                 return(2);
 375         pmon(mtmp);
 376         return(1);
 377 }
 378
 379 /* return roomnumber or -1 */
 380 int
 381 inroom(xchar x, xchar y)
 382 {
 383 #ifndef QUEST
 384         struct mkroom *croom = &rooms[0];
 385         while(croom->hx >= 0){
 386                 if(croom->hx >= x-1 && croom->lx <= x+1 &&
 387                    croom->hy >= y-1 && croom->ly <= y+1)
 388                         return(croom - rooms);
 389                 croom++;
 390         }
 391 #endif /* QUEST */
 392         return(-1);     /* not in room or on door */
 393 }
 394
 395 bool
 396 tamedog(struct monst *mtmp, struct obj *obj)
 397 {
 398         struct monst *mtmp2;
 399
 400         if(flags.moonphase == FULL_MOON && night() && rn2(6))
 401                 return(0);
 402
 403         /* If we cannot tame him, at least he's no longer afraid. */
 404         mtmp->mflee = 0;
 405         mtmp->mfleetim = 0;
 406         if(mtmp->mtame || mtmp->mfroz ||
 407 #ifndef NOWORM
 408                 mtmp->wormno ||
 409 #endif /* NOWORM */
 410                 mtmp->isshk || mtmp->isgd || index(" &@12", mtmp->data->mlet))
 411                 return(0); /* no tame long worms? */
 412         if(obj) {
 413                 if(dogfood(obj) >= MANFOOD) return(0);
 414                 if(cansee(mtmp->mx,mtmp->my)){
 415                         pline("%s devours the %s.", Monnam(mtmp),
 416                                 objects[obj->otyp].oc_name);
 417                 }
 418                 obfree(obj, (struct obj *) 0);
 419         }
 420         mtmp2 = newmonst(sizeof(struct edog) + mtmp->mnamelth);
 421         *mtmp2 = *mtmp;
 422         mtmp2->mxlth = sizeof(struct edog);
 423         if(mtmp->mnamelth) strcpy(NAME(mtmp2), NAME(mtmp));
 424         initedog(mtmp2);
 425         replmon(mtmp,mtmp2);
 426         return(1);
 427 }