hack/hack.dog.c

   1 /*
   2  * Copyright (c) Stichting Mathematisch Centrum, Amsterdam, 1985.
   3  */
   4
   5 #ifndef lint
   6 static char rcsid[] = "$NetBSD: hack.dog.c,v 1.3 1995/03/23 08:29:59 cgd Exp $";
   7 #endif /* not lint */
   8
   9 #include        "hack.h"
  10 #include        "hack.mfndpos.h"
  11 extern struct monst *makemon();
  12 #include "def.edog.h"
  13 #include "def.mkroom.h"
  14
  15 struct permonst li_dog =
  16         { "little dog", 'd',2,18,6,1,6,sizeof(struct edog) };
  17 struct permonst dog =
  18         { "dog", 'd',4,16,5,1,6,sizeof(struct edog) };
  19 struct permonst la_dog =
  20         { "large dog", 'd',6,15,4,2,4,sizeof(struct edog) };
  21
  22
  23 makedog(){
  24 register struct monst *mtmp = makemon(&li_dog,u.ux,u.uy);
  25         if(!mtmp) return; /* dogs were genocided */
  26         initedog(mtmp);
  27 }
  28
  29 initedog(mtmp) register struct monst *mtmp; {
  30         mtmp->mtame = mtmp->mpeaceful = 1;
  31         EDOG(mtmp)->hungrytime = 1000 + moves;
  32         EDOG(mtmp)->eattime = 0;
  33         EDOG(mtmp)->droptime = 0;
  34         EDOG(mtmp)->dropdist = 10000;
  35         EDOG(mtmp)->apport = 10;
  36         EDOG(mtmp)->whistletime = 0;
  37 }
  38
  39 /* attach the monsters that went down (or up) together with @ */
  40 struct monst *mydogs = 0;
  41 struct monst *fallen_down = 0;  /* monsters that fell through a trapdoor */
  42         /* they will appear on the next level @ goes to, even if he goes up! */
  43
  44 losedogs(){
  45 register struct monst *mtmp;
  46         while(mtmp = mydogs){
  47                 mydogs = mtmp->nmon;
  48                 mtmp->nmon = fmon;
  49                 fmon = mtmp;
  50                 mnexto(mtmp);
  51         }
  52         while(mtmp = fallen_down){
  53                 fallen_down = mtmp->nmon;
  54                 mtmp->nmon = fmon;
  55                 fmon = mtmp;
  56                 rloc(mtmp);
  57         }
  58 }
  59
  60 keepdogs(){
  61 register struct monst *mtmp;
  62         for(mtmp = fmon; mtmp; mtmp = mtmp->nmon)
  63             if(dist(mtmp->mx,mtmp->my) < 3 && follower(mtmp)
  64                 && !mtmp->msleep && !mtmp->mfroz) {
  65                 relmon(mtmp);
  66                 mtmp->nmon = mydogs;
  67                 mydogs = mtmp;
  68                 unpmon(mtmp);
  69                 keepdogs();     /* we destroyed the link, so use recursion */
  70                 return;         /* (admittedly somewhat primitive) */
  71         }
  72 }
  73
  74 fall_down(mtmp) register struct monst *mtmp; {
  75         relmon(mtmp);
  76         mtmp->nmon = fallen_down;
  77         fallen_down = mtmp;
  78         unpmon(mtmp);
  79         mtmp->mtame = 0;
  80 }
  81
  82 /* return quality of food; the lower the better */
  83 #define DOGFOOD 0
  84 #define CADAVER 1
  85 #define ACCFOOD 2
  86 #define MANFOOD 3
  87 #define APPORT  4
  88 #define POISON  5
  89 #define UNDEF   6
  90 dogfood(obj) register struct obj *obj; {
  91         switch(obj->olet) {
  92         case FOOD_SYM:
  93             return(
  94                 (obj->otyp == TRIPE_RATION) ? DOGFOOD :
  95                 (obj->otyp < CARROT) ? ACCFOOD :
  96                 (obj->otyp < CORPSE) ? MANFOOD :
  97                 (poisonous(obj) || obj->age + 50 <= moves ||
  98                     obj->otyp == DEAD_COCKATRICE)
  99                         ? POISON : CADAVER
 100             );
 101         default:
 102             if(!obj->cursed) return(APPORT);
 103             /* fall into next case */
 104         case BALL_SYM:
 105         case CHAIN_SYM:
 106         case ROCK_SYM:
 107             return(UNDEF);
 108         }
 109 }
 110
 111 /* return 0 (no move), 1 (move) or 2 (dead) */
 112 dog_move(mtmp, after) register struct monst *mtmp; {
 113 register int nx,ny,omx,omy,appr,nearer,j;
 114 int udist,chi,i,whappr;
 115 register struct monst *mtmp2;
 116 register struct permonst *mdat = mtmp->data;
 117 register struct edog *edog = EDOG(mtmp);
 118 struct obj *obj;
 119 struct trap *trap;
 120 xchar cnt,chcnt,nix,niy;
 121 schar dogroom,uroom;
 122 xchar gx,gy,gtyp,otyp;  /* current goal */
 123 coord poss[9];
 124 int info[9];
 125 #define GDIST(x,y) ((x-gx)*(x-gx) + (y-gy)*(y-gy))
 126 #define DDIST(x,y) ((x-omx)*(x-omx) + (y-omy)*(y-omy))
 127
 128         if(moves <= edog->eattime) return(0);   /* dog is still eating */
 129         omx = mtmp->mx;
 130         omy = mtmp->my;
 131         whappr = (moves - EDOG(mtmp)->whistletime < 5);
 132         if(moves > edog->hungrytime + 500 && !mtmp->mconf){
 133                 mtmp->mconf = 1;
 134                 mtmp->mhpmax /= 3;
 135                 if(mtmp->mhp > mtmp->mhpmax)
 136                         mtmp->mhp = mtmp->mhpmax;
 137                 if(cansee(omx,omy))
 138                         pline("%s is confused from hunger.", Monnam(mtmp));
 139                 else    pline("You feel worried about %s.", monnam(mtmp));
 140         } else
 141         if(moves > edog->hungrytime + 750 || mtmp->mhp < 1){
 142                 if(cansee(omx,omy))
 143                         pline("%s dies from hunger.", Monnam(mtmp));
 144                 else
 145                 pline("You have a sad feeling for a moment, then it passes.");
 146                 mondied(mtmp);
 147                 return(2);
 148         }
 149         dogroom = inroom(omx,omy);
 150         uroom = inroom(u.ux,u.uy);
 151         udist = dist(omx,omy);
 152
 153         /* maybe we tamed him while being swallowed --jgm */
 154         if(!udist) return(0);
 155
 156         /* if we are carrying sth then we drop it (perhaps near @) */
 157         /* Note: if apport == 1 then our behaviour is independent of udist */
 158         if(mtmp->minvent){
 159                 if(!rn2(udist) || !rn2((int) edog->apport))
 160                 if(rn2(10) < edog->apport){
 161                         relobj(mtmp, (int) mtmp->minvis);
 162                         if(edog->apport > 1) edog->apport--;
 163                         edog->dropdist = udist;         /* hpscdi!jon */
 164                         edog->droptime = moves;
 165                 }
 166         } else {
 167                 if(obj = o_at(omx,omy)) if(!index("0_", obj->olet)){
 168                     if((otyp = dogfood(obj)) <= CADAVER){
 169                         nix = omx;
 170                         niy = omy;
 171                         goto eatobj;
 172                     }
 173                     if(obj->owt < 10*mtmp->data->mlevel)
 174                     if(rn2(20) < edog->apport+3)
 175                     if(rn2(udist) || !rn2((int) edog->apport)){
 176                         freeobj(obj);
 177                         unpobj(obj);
 178                         /* if(levl[omx][omy].scrsym == obj->olet)
 179                                 newsym(omx,omy); */
 180                         mpickobj(mtmp,obj);
 181                     }
 182                 }
 183         }
 184
 185         /* first we look for food */
 186         gtyp = UNDEF;   /* no goal as yet */
 187 #ifdef LINT
 188         gx = gy = 0;    /* suppress 'used before set' message */
 189 #endif LINT
 190         for(obj = fobj; obj; obj = obj->nobj) {
 191                 otyp = dogfood(obj);
 192                 if(otyp > gtyp || otyp == UNDEF) continue;
 193                 if(inroom(obj->ox,obj->oy) != dogroom) continue;
 194                 if(otyp < MANFOOD &&
 195                  (dogroom >= 0 || DDIST(obj->ox,obj->oy) < 10)) {
 196                         if(otyp < gtyp || (otyp == gtyp &&
 197                                 DDIST(obj->ox,obj->oy) < DDIST(gx,gy))){
 198                                 gx = obj->ox;
 199                                 gy = obj->oy;
 200                                 gtyp = otyp;
 201                         }
 202                 } else
 203                 if(gtyp == UNDEF && dogroom >= 0 &&
 204                    uroom == dogroom &&
 205                    !mtmp->minvent && edog->apport > rn2(8)){
 206                         gx = obj->ox;
 207                         gy = obj->oy;
 208                         gtyp = APPORT;
 209                 }
 210         }
 211         if(gtyp == UNDEF ||
 212           (gtyp != DOGFOOD && gtyp != APPORT && moves < edog->hungrytime)){
 213                 if(dogroom < 0 || dogroom == uroom){
 214                         gx = u.ux;
 215                         gy = u.uy;
 216 #ifndef QUEST
 217                 } else {
 218                         int tmp = rooms[dogroom].fdoor;
 219                             cnt = rooms[dogroom].doorct;
 220
 221                         gx = gy = FAR;  /* random, far away */
 222                         while(cnt--){
 223                             if(dist(gx,gy) >
 224                                 dist(doors[tmp].x, doors[tmp].y)){
 225                                         gx = doors[tmp].x;
 226                                         gy = doors[tmp].y;
 227                                 }
 228                                 tmp++;
 229                         }
 230                         /* here gx == FAR e.g. when dog is in a vault */
 231                         if(gx == FAR || (gx == omx && gy == omy)){
 232                                 gx = u.ux;
 233                                 gy = u.uy;
 234                         }
 235 #endif QUEST
 236                 }
 237                 appr = (udist >= 9) ? 1 : (mtmp->mflee) ? -1 : 0;
 238                 if(after && udist <= 4 && gx == u.ux && gy == u.uy)
 239                         return(0);
 240                 if(udist > 1){
 241                         if(!IS_ROOM(levl[u.ux][u.uy].typ) || !rn2(4) ||
 242                            whappr ||
 243                            (mtmp->minvent && rn2((int) edog->apport)))
 244                                 appr = 1;
 245                 }
 246                 /* if you have dog food he'll follow you more closely */
 247                 if(appr == 0){
 248                         obj = invent;
 249                         while(obj){
 250                                 if(obj->otyp == TRIPE_RATION){
 251                                         appr = 1;
 252                                         break;
 253                                 }
 254                                 obj = obj->nobj;
 255                         }
 256                 }
 257         } else  appr = 1;       /* gtyp != UNDEF */
 258         if(mtmp->mconf) appr = 0;
 259
 260         if(gx == u.ux && gy == u.uy && (dogroom != uroom || dogroom < 0)){
 261         extern coord *gettrack();
 262         register coord *cp;
 263                 cp = gettrack(omx,omy);
 264                 if(cp){
 265                         gx = cp->x;
 266                         gy = cp->y;
 267                 }
 268         }
 269
 270         nix = omx;
 271         niy = omy;
 272         cnt = mfndpos(mtmp,poss,info,ALLOW_M | ALLOW_TRAPS);
 273         chcnt = 0;
 274         chi = -1;
 275         for(i=0; i<cnt; i++){
 276                 nx = poss[i].x;
 277                 ny = poss[i].y;
 278                 if(info[i] & ALLOW_M){
 279                         mtmp2 = m_at(nx,ny);
 280                         if(mtmp2->data->mlevel >= mdat->mlevel+2 ||
 281                           mtmp2->data->mlet == 'c')
 282                                 continue;
 283                         if(after) return(0); /* hit only once each move */
 284
 285                         if(hitmm(mtmp, mtmp2) == 1 && rn2(4) &&
 286                           mtmp2->mlstmv != moves &&
 287                           hitmm(mtmp2,mtmp) == 2) return(2);
 288                         return(0);
 289                 }
 290
 291                 /* dog avoids traps */
 292                 /* but perhaps we have to pass a trap in order to follow @ */
 293                 if((info[i] & ALLOW_TRAPS) && (trap = t_at(nx,ny))){
 294                         if(!trap->tseen && rn2(40)) continue;
 295                         if(rn2(10)) continue;
 296                 }
 297
 298                 /* dog eschewes cursed objects */
 299                 /* but likes dog food */
 300                 obj = fobj;
 301                 while(obj){
 302                     if(obj->ox != nx || obj->oy != ny)
 303                         goto nextobj;
 304                     if(obj->cursed) goto nxti;
 305                     if(obj->olet == FOOD_SYM &&
 306                         (otyp = dogfood(obj)) < MANFOOD &&
 307                         (otyp < ACCFOOD || edog->hungrytime <= moves)){
 308                         /* Note: our dog likes the food so much that he
 309                         might eat it even when it conceals a cursed object */
 310                         nix = nx;
 311                         niy = ny;
 312                         chi = i;
 313                      eatobj:
 314                         edog->eattime =
 315                             moves + obj->quan * objects[obj->otyp].oc_delay;
 316                         if(edog->hungrytime < moves)
 317                             edog->hungrytime = moves;
 318                         edog->hungrytime +=
 319                             5*obj->quan * objects[obj->otyp].nutrition;
 320                         mtmp->mconf = 0;
 321                         if(cansee(nix,niy))
 322                             pline("%s ate %s.", Monnam(mtmp), doname(obj));
 323                         /* perhaps this was a reward */
 324                         if(otyp != CADAVER)
 325                         edog->apport += 200/(edog->dropdist+moves-edog->droptime);
 326                         delobj(obj);
 327                         goto newdogpos;
 328                     }
 329                 nextobj:
 330                     obj = obj->nobj;
 331                 }
 332
 333                 for(j=0; j<MTSZ && j<cnt-1; j++)
 334                         if(nx == mtmp->mtrack[j].x && ny == mtmp->mtrack[j].y)
 335                                 if(rn2(4*(cnt-j))) goto nxti;
 336
 337 /* Some stupid C compilers cannot compute the whole expression at once. */
 338                 nearer = GDIST(nx,ny);
 339                 nearer -= GDIST(nix,niy);
 340                 nearer *= appr;
 341                 if((nearer == 0 && !rn2(++chcnt)) || nearer<0 ||
 342                         (nearer > 0 && !whappr &&
 343                                 ((omx == nix && omy == niy && !rn2(3))
 344                                 || !rn2(12))
 345                         )){
 346                         nix = nx;
 347                         niy = ny;
 348                         if(nearer < 0) chcnt = 0;
 349                         chi = i;
 350                 }
 351         nxti:   ;
 352         }
 353 newdogpos:
 354         if(nix != omx || niy != omy){
 355                 if(info[chi] & ALLOW_U){
 356                         (void) hitu(mtmp, d(mdat->damn, mdat->damd)+1);
 357                         return(0);
 358                 }
 359                 mtmp->mx = nix;
 360                 mtmp->my = niy;
 361                 for(j=MTSZ-1; j>0; j--) mtmp->mtrack[j] = mtmp->mtrack[j-1];
 362                 mtmp->mtrack[0].x = omx;
 363                 mtmp->mtrack[0].y = omy;
 364         }
 365         if(mintrap(mtmp) == 2)  /* he died */
 366                 return(2);
 367         pmon(mtmp);
 368         return(1);
 369 }
 370
 371 /* return roomnumber or -1 */
 372 inroom(x,y) xchar x,y; {
 373 #ifndef QUEST
 374         register struct mkroom *croom = &rooms[0];
 375         while(croom->hx >= 0){
 376                 if(croom->hx >= x-1 && croom->lx <= x+1 &&
 377                    croom->hy >= y-1 && croom->ly <= y+1)
 378                         return(croom - rooms);
 379                 croom++;
 380         }
 381 #endif QUEST
 382         return(-1);     /* not in room or on door */
 383 }
 384
 385 tamedog(mtmp, obj)
 386 register struct monst *mtmp;
 387 register struct obj *obj;
 388 {
 389         register struct monst *mtmp2;
 390
 391         if(flags.moonphase == FULL_MOON && night() && rn2(6))
 392                 return(0);
 393
 394         /* If we cannot tame him, at least he's no longer afraid. */
 395         mtmp->mflee = 0;
 396         mtmp->mfleetim = 0;
 397         if(mtmp->mtame || mtmp->mfroz ||
 398 #ifndef NOWORM
 399                 mtmp->wormno ||
 400 #endif NOWORM
 401                 mtmp->isshk || mtmp->isgd || index(" &@12", mtmp->data->mlet))
 402                 return(0); /* no tame long worms? */
 403         if(obj) {
 404                 if(dogfood(obj) >= MANFOOD) return(0);
 405                 if(cansee(mtmp->mx,mtmp->my)){
 406                         pline("%s devours the %s.", Monnam(mtmp),
 407                                 objects[obj->otyp].oc_name);
 408                 }
 409                 obfree(obj, (struct obj *) 0);
 410         }
 411         mtmp2 = newmonst(sizeof(struct edog) + mtmp->mnamelth);
 412         *mtmp2 = *mtmp;
 413         mtmp2->mxlth = sizeof(struct edog);
 414         if(mtmp->mnamelth) (void) strcpy(NAME(mtmp2), NAME(mtmp));
 415         initedog(mtmp2);
 416         replmon(mtmp,mtmp2);
 417         return(1);
 418 }