games/hack/hack.trap.c

   1 /* Copyright (c) Stichting Mathematisch Centrum, Amsterdam, 1985. */
   2 /* hack.trap.c - version 1.0.3 */
   3 /* $FreeBSD: src/games/hack/hack.trap.c,v 1.5 1999/11/16 10:26:38 marcel Exp $ */
   4 /* $DragonFly: src/games/hack/hack.trap.c,v 1.5 2006/08/21 19:45:32 pavalos Exp $ */
   5
   6 #include        "hack.h"
   7
   8 char vowels[] = "aeiou";
   9
  10 const char *traps[] = {
  11         " bear trap",
  12         "n arrow trap",
  13         " dart trap",
  14         " trapdoor",
  15         " teleportation trap",
  16         " pit",
  17         " sleeping gas trap",
  18         " piercer",
  19         " mimic"
  20 };
  21
  22 static void     vtele(void);
  23 static void     teleds(int, int);
  24 static bool     teleok(int, int);
  25
  26 struct trap *
  27 maketrap(int x, int y, int typ)
  28 {
  29         struct trap *ttmp;
  30
  31         ttmp = newtrap();
  32         ttmp->ttyp = typ;
  33         ttmp->tseen = 0;
  34         ttmp->once = 0;
  35         ttmp->tx = x;
  36         ttmp->ty = y;
  37         ttmp->ntrap = ftrap;
  38         ftrap = ttmp;
  39         return(ttmp);
  40 }
  41
  42 void
  43 dotrap(struct trap *trap)
  44 {
  45         int ttype = trap->ttyp;
  46
  47         nomul(0);
  48         if(trap->tseen && !rn2(5) && ttype != PIT)
  49                 pline("You escape a%s.", traps[ttype]);
  50         else {
  51                 trap->tseen = 1;
  52                 switch(ttype) {
  53                 case SLP_GAS_TRAP:
  54                         pline("A cloud of gas puts you to sleep!");
  55                         nomul(-rnd(25));
  56                         break;
  57                 case BEAR_TRAP:
  58                         if(Levitation) {
  59                                 pline("You float over a bear trap.");
  60                                 break;
  61                         }
  62                         u.utrap = 4 + rn2(4);
  63                         u.utraptype = TT_BEARTRAP;
  64                         pline("A bear trap closes on your foot!");
  65                         break;
  66                 case PIERC:
  67                         deltrap(trap);
  68                         if(makemon(PM_PIERCER,u.ux,u.uy)) {
  69                           pline("A piercer suddenly drops from the ceiling!");
  70                           if(uarmh)
  71                                 pline("Its blow glances off your helmet.");
  72                           else
  73                                 thitu(3,d(4,6),"falling piercer");
  74                         }
  75                         break;
  76                 case ARROW_TRAP:
  77                         pline("An arrow shoots out at you!");
  78                         if(!thitu(8,rnd(6),"arrow")){
  79                                 mksobj_at(ARROW, u.ux, u.uy);
  80                                 fobj->quan = 1;
  81                         }
  82                         break;
  83                 case TRAPDOOR:
  84                         if(!xdnstair) {
  85 pline("A trap door in the ceiling opens and a rock falls on your head!");
  86 if(uarmh) pline("Fortunately, you are wearing a helmet!");
  87                             losehp(uarmh ? 2 : d(2,10),"falling rock");
  88                             mksobj_at(ROCK, u.ux, u.uy);
  89                             fobj->quan = 1;
  90                             stackobj(fobj);
  91                             if(Invisible) newsym(u.ux, u.uy);
  92                         } else {
  93                             int newlevel = dlevel + 1;
  94                                 while(!rn2(4) && newlevel < 29)
  95                                         newlevel++;
  96                                 pline("A trap door opens up under you!");
  97                                 if(Levitation || u.ustuck) {
  98                                 pline("For some reason you don't fall in.");
  99                                         break;
 100                                 }
 101
 102                                 goto_level(newlevel, FALSE);
 103                         }
 104                         break;
 105                 case DART_TRAP:
 106                         pline("A little dart shoots out at you!");
 107                         if(thitu(7,rnd(3),"little dart")) {
 108                             if(!rn2(6))
 109                                 poisoned("dart","poison dart");
 110                         } else {
 111                                 mksobj_at(DART, u.ux, u.uy);
 112                                 fobj->quan = 1;
 113                         }
 114                         break;
 115                 case TELEP_TRAP:
 116                         if(trap->once) {
 117                                 deltrap(trap);
 118                                 newsym(u.ux,u.uy);
 119                                 vtele();
 120                         } else {
 121                                 newsym(u.ux,u.uy);
 122                                 tele();
 123                         }
 124                         break;
 125                 case PIT:
 126                         if(Levitation) {
 127                                 pline("A pit opens up under you!");
 128                                 pline("You don't fall in!");
 129                                 break;
 130                         }
 131                         pline("You fall into a pit!");
 132                         u.utrap = rn1(6,2);
 133                         u.utraptype = TT_PIT;
 134                         losehp(rnd(6),"fall into a pit");
 135                         selftouch("Falling, you");
 136                         break;
 137                 default:
 138                         impossible("You hit a trap of type %u", trap->ttyp);
 139                 }
 140         }
 141 }
 142
 143 int
 144 mintrap(struct monst *mtmp)
 145 {
 146         struct trap *trap = t_at(mtmp->mx, mtmp->my);
 147         int wasintrap = mtmp->mtrapped;
 148
 149         if(!trap) {
 150                 mtmp->mtrapped = 0;     /* perhaps teleported? */
 151         } else if(wasintrap) {
 152                 if(!rn2(40)) mtmp->mtrapped = 0;
 153         } else {
 154             int tt = trap->ttyp;
 155             int in_sight = cansee(mtmp->mx,mtmp->my);
 156
 157             if(mtmp->mtrapseen & (1 << tt)) {
 158                 /* he has been in such a trap - perhaps he escapes */
 159                 if(rn2(4)) return(0);
 160             }
 161             mtmp->mtrapseen |= (1 << tt);
 162             switch (tt) {
 163                 case BEAR_TRAP:
 164                         if(index(mlarge, mtmp->data->mlet)) {
 165                                 if(in_sight)
 166                                   pline("%s is caught in a bear trap!",
 167                                         Monnam(mtmp));
 168                                 else
 169                                   if(mtmp->data->mlet == 'o')
 170                             pline("You hear the roaring of an angry bear!");
 171                                 mtmp->mtrapped = 1;
 172                         }
 173                         break;
 174                 case PIT:
 175                         /* there should be a mtmp/data -> floating */
 176                         if(!index("EywBfk'& ", mtmp->data->mlet)) { /* ab */
 177                                 mtmp->mtrapped = 1;
 178                                 if(in_sight)
 179                                   pline("%s falls in a pit!", Monnam(mtmp));
 180                         }
 181                         break;
 182                 case SLP_GAS_TRAP:
 183                         if(!mtmp->msleep && !mtmp->mfroz) {
 184                                 mtmp->msleep = 1;
 185                                 if(in_sight)
 186                                   pline("%s suddenly falls asleep!",
 187                                         Monnam(mtmp));
 188                         }
 189                         break;
 190                 case TELEP_TRAP:
 191                         rloc(mtmp);
 192                         if(in_sight && !cansee(mtmp->mx,mtmp->my))
 193                                 pline("%s suddenly disappears!",
 194                                         Monnam(mtmp));
 195                         break;
 196                 case ARROW_TRAP:
 197                         if(in_sight) {
 198                                 pline("%s is hit by an arrow!",
 199                                         Monnam(mtmp));
 200                         }
 201                         mtmp->mhp -= 3;
 202                         break;
 203                 case DART_TRAP:
 204                         if(in_sight) {
 205                                 pline("%s is hit by a dart!",
 206                                         Monnam(mtmp));
 207                         }
 208                         mtmp->mhp -= 2;
 209                         /* not mondied here !! */
 210                         break;
 211                 case TRAPDOOR:
 212                         if(!xdnstair) {
 213                                 mtmp->mhp -= 10;
 214                                 if(in_sight)
 215 pline("A trap door in the ceiling opens and a rock hits %s!", monnam(mtmp));
 216                                 break;
 217                         }
 218                         if(mtmp->data->mlet != 'w'){
 219                                 fall_down(mtmp);
 220                                 if(in_sight)
 221                 pline("Suddenly, %s disappears out of sight.", monnam(mtmp));
 222                                 return(2);      /* no longer on this level */
 223                         }
 224                         break;
 225                 case PIERC:
 226                         break;
 227                 default:
 228                         impossible("Some monster encountered a strange trap.");
 229             }
 230         }
 231         return(mtmp->mtrapped);
 232 }
 233
 234 void
 235 selftouch(const char *arg)
 236 {
 237         if(uwep && uwep->otyp == DEAD_COCKATRICE){
 238                 pline("%s touch the dead cockatrice.", arg);
 239                 pline("You turn to stone.");
 240                 killer = objects[uwep->otyp].oc_name;
 241                 done("died");
 242         }
 243 }
 244
 245 void
 246 float_up(void)
 247 {
 248         if(u.utrap) {
 249                 if(u.utraptype == TT_PIT) {
 250                         u.utrap = 0;
 251                         pline("You float up, out of the pit!");
 252                 } else {
 253                         pline("You float up, only your leg is still stuck.");
 254                 }
 255         } else
 256                 pline("You start to float in the air!");
 257 }
 258
 259 void
 260 float_down(void)
 261 {
 262         struct trap *trap;
 263         pline("You float gently to the ground.");
 264         if((trap = t_at(u.ux,u.uy)))
 265                 switch(trap->ttyp) {
 266                 case PIERC:
 267                         break;
 268                 case TRAPDOOR:
 269                         if(!xdnstair || u.ustuck) break;
 270                         /* fall into next case */
 271                 default:
 272                         dotrap(trap);
 273         }
 274         pickup(1);
 275 }
 276
 277 static void
 278 vtele(void)
 279 {
 280         struct mkroom *croom;
 281         for(croom = &rooms[0]; croom->hx >= 0; croom++)
 282             if(croom->rtype == VAULT) {
 283                 int x,y;
 284
 285                 x = rn2(2) ? croom->lx : croom->hx;
 286                 y = rn2(2) ? croom->ly : croom->hy;
 287                 if(teleok(x,y)) {
 288                     teleds(x,y);
 289                     return;
 290                 }
 291             }
 292         tele();
 293 }
 294
 295 void
 296 tele(void)
 297 {
 298         coord cc;
 299         int nux,nuy;
 300
 301         if(Teleport_control) {
 302                 pline("To what position do you want to be teleported?");
 303                 cc = getpos(1, "the desired position"); /* 1: force valid */
 304                 /* possible extensions: introduce a small error if
 305                    magic power is low; allow transfer to solid rock */
 306                 if(teleok(cc.x, cc.y)){
 307                         teleds(cc.x, cc.y);
 308                         return;
 309                 }
 310                 pline("Sorry ...");
 311         }
 312         do {
 313                 nux = rnd(COLNO-1);
 314                 nuy = rn2(ROWNO);
 315         } while(!teleok(nux, nuy));
 316         teleds(nux, nuy);
 317 }
 318
 319 static void
 320 teleds(int nux, int nuy)
 321 {
 322         if(Punished) unplacebc();
 323         unsee();
 324         u.utrap = 0;
 325         u.ustuck = 0;
 326         u.ux = nux;
 327         u.uy = nuy;
 328         setsee();
 329         if(Punished) placebc(1);
 330         if(u.uswallow){
 331                 u.uswldtim = u.uswallow = 0;
 332                 docrt();
 333         }
 334         nomul(0);
 335         if(levl[nux][nuy].typ == POOL && !Levitation)
 336                 drown();
 337         inshop();
 338         pickup(1);
 339         if(!Blind) read_engr_at(u.ux,u.uy);
 340 }
 341
 342 static bool
 343 teleok(int x, int y)    /* might throw him into a POOL */
 344 {
 345         return( isok(x,y) && !IS_ROCK(levl[x][y].typ) && !m_at(x,y) &&
 346                 !sobj_at(ENORMOUS_ROCK,x,y) && !t_at(x,y)
 347         );
 348         /* Note: gold is permitted (because of vaults) */
 349 }
 350
 351 int
 352 dotele(void)
 353 {
 354         if(
 355 #ifdef WIZARD
 356            !wizard &&
 357 #endif /* WIZARD */
 358                       (!Teleportation || u.ulevel < 6 ||
 359                         (pl_character[0] != 'W' && u.ulevel < 10))) {
 360                 pline("You are not able to teleport at will.");
 361                 return(0);
 362         }
 363         if(u.uhunger <= 100 || u.ustr < 6) {
 364                 pline("You miss the strength for a teleport spell.");
 365                 return(1);
 366         }
 367         tele();
 368         morehungry(100);
 369         return(1);
 370 }
 371
 372 void
 373 placebc(int attach)
 374 {
 375         if(!uchain || !uball){
 376                 impossible("Where are your chain and ball??");
 377                 return;
 378         }
 379         uball->ox = uchain->ox = u.ux;
 380         uball->oy = uchain->oy = u.uy;
 381         if(attach){
 382                 uchain->nobj = fobj;
 383                 fobj = uchain;
 384                 if(!carried(uball)){
 385                         uball->nobj = fobj;
 386                         fobj = uball;
 387                 }
 388         }
 389 }
 390
 391 void
 392 unplacebc(void)
 393 {
 394         if(!carried(uball)){
 395                 freeobj(uball);
 396                 unpobj(uball);
 397         }
 398         freeobj(uchain);
 399         unpobj(uchain);
 400 }
 401
 402 void
 403 level_tele(void)
 404 {
 405 int newlevel;
 406         if(Teleport_control) {
 407             char buf[BUFSZ];
 408
 409             do {
 410               pline("To what level do you want to teleport? [type a number] ");
 411               getlin(buf);
 412             } while(!digit(buf[0]) && (buf[0] != '-' || !digit(buf[1])));
 413             newlevel = atoi(buf);
 414         } else {
 415             newlevel  = 5 + rn2(20);    /* 5 - 24 */
 416             if(dlevel == newlevel) {
 417                 if(!xdnstair) newlevel--; else newlevel++;
 418             }
 419         }
 420         if(newlevel >= 30) {
 421             if(newlevel > MAXLEVEL) newlevel = MAXLEVEL;
 422             pline("You arrive at the center of the earth ...");
 423             pline("Unfortunately it is here that hell is located.");
 424             if(Fire_resistance) {
 425                 pline("But the fire doesn't seem to harm you.");
 426             } else {
 427                 pline("You burn to a crisp.");
 428                 dlevel = maxdlevel = newlevel;
 429                 killer = "visit to the hell";
 430                 done("burned");
 431             }
 432         }
 433         if(newlevel < 0) {
 434             newlevel = 0;
 435             pline("You are now high above the clouds ...");
 436             if(Levitation) {
 437                 pline("You float gently down to earth.");
 438                 done("escaped");
 439             }
 440             pline("Unfortunately, you don't know how to fly.");
 441             pline("You fall down a few thousand feet and break your neck.");
 442             dlevel = 0;
 443             killer = "fall";
 444             done("died");
 445         }
 446
 447         goto_level(newlevel, FALSE); /* calls done("escaped") if newlevel==0 */
 448 }
 449
 450 void
 451 drown(void)
 452 {
 453         pline("You fall into a pool!");
 454         pline("You can't swim!");
 455         if(rn2(3) < u.uluck+2) {
 456                 /* most scrolls become unreadable */
 457                 struct obj *obj;
 458
 459                 for(obj = invent; obj; obj = obj->nobj)
 460                         if(obj->olet == SCROLL_SYM && rn2(12) > u.uluck)
 461                                 obj->otyp = SCR_BLANK_PAPER;
 462                 /* we should perhaps merge these scrolls ? */
 463
 464                 pline("You attempt a teleport spell."); /* utcsri!carroll */
 465                 dotele();
 466                 if(levl[u.ux][u.uy].typ != POOL) return;
 467         }
 468         pline("You drown ...");
 469         killer = "pool of water";
 470         done("drowned");
 471 }