hack/hack.trap.c

   1 /*      $NetBSD: hack.trap.c,v 1.8 2009/06/07 18:30:39 dholland Exp $   */
   2
   3 /*
   4  * Copyright (c) 1985, Stichting Centrum voor Wiskunde en Informatica,
   5  * Amsterdam
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions are
  10  * met:
  11  *
  12  * - Redistributions of source code must retain the above copyright notice,
  13  * this list of conditions and the following disclaimer.
  14  *
  15  * - Redistributions in binary form must reproduce the above copyright
  16  * notice, this list of conditions and the following disclaimer in the
  17  * documentation and/or other materials provided with the distribution.
  18  *
  19  * - Neither the name of the Stichting Centrum voor Wiskunde en
  20  * Informatica, nor the names of its contributors may be used to endorse or
  21  * promote products derived from this software without specific prior
  22  * written permission.
  23  *
  24  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
  25  * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  26  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
  27  * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
  28  * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  29  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  30  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  31  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  32  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  33  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  34  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  35  */
  36
  37 /*
  38  * Copyright (c) 1982 Jay Fenlason <hack@gnu.org>
  39  * All rights reserved.
  40  *
  41  * Redistribution and use in source and binary forms, with or without
  42  * modification, are permitted provided that the following conditions
  43  * are met:
  44  * 1. Redistributions of source code must retain the above copyright
  45  *    notice, this list of conditions and the following disclaimer.
  46  * 2. Redistributions in binary form must reproduce the above copyright
  47  *    notice, this list of conditions and the following disclaimer in the
  48  *    documentation and/or other materials provided with the distribution.
  49  * 3. The name of the author may not be used to endorse or promote products
  50  *    derived from this software without specific prior written permission.
  51  *
  52  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
  53  * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
  54  * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL
  55  * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  56  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  57  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
  58  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
  59  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
  60  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
  61  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  62  */
  63
  64 #include <sys/cdefs.h>
  65 #ifndef lint
  66 __RCSID("$NetBSD: hack.trap.c,v 1.8 2009/06/07 18:30:39 dholland Exp $");
  67 #endif                          /* not lint */
  68
  69 #include <stdlib.h>
  70 #include "hack.h"
  71 #include "extern.h"
  72 #include "def.mkroom.h"
  73
  74 const char            vowels[] = "aeiou";
  75
  76 const char           *const traps[] = {
  77         " bear trap",
  78         "n arrow trap",
  79         " dart trap",
  80         " trapdoor",
  81         " teleportation trap",
  82         " pit",
  83         " sleeping gas trap",
  84         " piercer",
  85         " mimic"
  86 };
  87
  88 struct trap    *
  89 maketrap(int x, int y, int typ)
  90 {
  91         struct trap    *ttmp;
  92
  93         ttmp = newtrap();
  94         ttmp->ttyp = typ;
  95         ttmp->tseen = 0;
  96         ttmp->once = 0;
  97         ttmp->tx = x;
  98         ttmp->ty = y;
  99         ttmp->ntrap = ftrap;
 100         ftrap = ttmp;
 101         return (ttmp);
 102 }
 103
 104 void
 105 dotrap(struct trap *trap)
 106 {
 107         int             ttype = trap->ttyp;
 108
 109         nomul(0);
 110         if (trap->tseen && !rn2(5) && ttype != PIT)
 111                 pline("You escape a%s.", traps[ttype]);
 112         else {
 113                 trap->tseen = 1;
 114                 switch (ttype) {
 115                 case SLP_GAS_TRAP:
 116                         pline("A cloud of gas puts you to sleep!");
 117                         nomul(-rnd(25));
 118                         break;
 119                 case BEAR_TRAP:
 120                         if (Levitation) {
 121                                 pline("You float over a bear trap.");
 122                                 break;
 123                         }
 124                         u.utrap = 4 + rn2(4);
 125                         u.utraptype = TT_BEARTRAP;
 126                         pline("A bear trap closes on your foot!");
 127                         break;
 128                 case PIERC:
 129                         deltrap(trap);
 130                         if (makemon(PM_PIERCER, u.ux, u.uy)) {
 131                                 pline("A piercer suddenly drops from the ceiling!");
 132                                 if (uarmh)
 133                                         pline("Its blow glances off your helmet.");
 134                                 else
 135                                         (void) thitu(3, d(4, 6), "falling piercer");
 136                         }
 137                         break;
 138                 case ARROW_TRAP:
 139                         pline("An arrow shoots out at you!");
 140                         if (!thitu(8, rnd(6), "arrow")) {
 141                                 mksobj_at(ARROW, u.ux, u.uy);
 142                                 fobj->quan = 1;
 143                         }
 144                         break;
 145                 case TRAPDOOR:
 146                         if (!xdnstair) {
 147                                 pline("A trap door in the ceiling opens and a rock falls on your head!");
 148                                 if (uarmh)
 149                                         pline("Fortunately, you are wearing a helmet!");
 150                                 losehp(uarmh ? 2 : d(2, 10), "falling rock");
 151                                 mksobj_at(ROCK, u.ux, u.uy);
 152                                 fobj->quan = 1;
 153                                 stackobj(fobj);
 154                                 if (Invisible)
 155                                         newsym(u.ux, u.uy);
 156                         } else {
 157                                 int             newlevel = dlevel + 1;
 158                                 while (!rn2(4) && newlevel < 29)
 159                                         newlevel++;
 160                                 pline("A trap door opens up under you!");
 161                                 if (Levitation || u.ustuck) {
 162                                         pline("For some reason you don't fall in.");
 163                                         break;
 164                                 }
 165                                 goto_level(newlevel, FALSE);
 166                         }
 167                         break;
 168                 case DART_TRAP:
 169                         pline("A little dart shoots out at you!");
 170                         if (thitu(7, rnd(3), "little dart")) {
 171                                 if (!rn2(6))
 172                                         poisoned("dart", "poison dart");
 173                         } else {
 174                                 mksobj_at(DART, u.ux, u.uy);
 175                                 fobj->quan = 1;
 176                         }
 177                         break;
 178                 case TELEP_TRAP:
 179                         if (trap->once) {
 180                                 deltrap(trap);
 181                                 newsym(u.ux, u.uy);
 182                                 vtele();
 183                         } else {
 184                                 newsym(u.ux, u.uy);
 185                                 tele();
 186                         }
 187                         break;
 188                 case PIT:
 189                         if (Levitation) {
 190                                 pline("A pit opens up under you!");
 191                                 pline("You don't fall in!");
 192                                 break;
 193                         }
 194                         pline("You fall into a pit!");
 195                         u.utrap = rn1(6, 2);
 196                         u.utraptype = TT_PIT;
 197                         losehp(rnd(6), "fall into a pit");
 198                         selftouch("Falling, you");
 199                         break;
 200                 default:
 201                         impossible("You hit a trap of type %u", trap->ttyp);
 202                 }
 203         }
 204 }
 205
 206 int
 207 mintrap(struct monst *mtmp)
 208 {
 209         struct trap    *trap = t_at(mtmp->mx, mtmp->my);
 210         int             wasintrap = mtmp->mtrapped;
 211
 212         if (!trap) {
 213                 mtmp->mtrapped = 0;     /* perhaps teleported? */
 214         } else if (wasintrap) {
 215                 if (!rn2(40))
 216                         mtmp->mtrapped = 0;
 217         } else {
 218                 int             tt = trap->ttyp;
 219                 int             in_sight = cansee(mtmp->mx, mtmp->my);
 220
 221                 if (mtmp->mtrapseen & (1 << tt)) {
 222                         /* he has been in such a trap - perhaps he escapes */
 223                         if (rn2(4))
 224                                 return (0);
 225                 }
 226                 mtmp->mtrapseen |= (1 << tt);
 227                 switch (tt) {
 228                 case BEAR_TRAP:
 229                         if (strchr(mlarge, mtmp->data->mlet)) {
 230                                 if (in_sight)
 231                                         pline("%s is caught in a bear trap!",
 232                                               Monnam(mtmp));
 233                                 else if (mtmp->data->mlet == 'o')
 234                                         pline("You hear the roaring of an angry bear!");
 235                                 mtmp->mtrapped = 1;
 236                         }
 237                         break;
 238                 case PIT:
 239                         /* there should be a mtmp/data -> floating */
 240                         if (!strchr("EywBfk'& ", mtmp->data->mlet)) {   /* ab */
 241                                 mtmp->mtrapped = 1;
 242                                 if (in_sight)
 243                                         pline("%s falls in a pit!", Monnam(mtmp));
 244                         }
 245                         break;
 246                 case SLP_GAS_TRAP:
 247                         if (!mtmp->msleep && !mtmp->mfroz) {
 248                                 mtmp->msleep = 1;
 249                                 if (in_sight)
 250                                         pline("%s suddenly falls asleep!",
 251                                               Monnam(mtmp));
 252                         }
 253                         break;
 254                 case TELEP_TRAP:
 255                         rloc(mtmp);
 256                         if (in_sight && !cansee(mtmp->mx, mtmp->my))
 257                                 pline("%s suddenly disappears!",
 258                                       Monnam(mtmp));
 259                         break;
 260                 case ARROW_TRAP:
 261                         if (in_sight) {
 262                                 pline("%s is hit by an arrow!",
 263                                       Monnam(mtmp));
 264                         }
 265                         mtmp->mhp -= 3;
 266                         break;
 267                 case DART_TRAP:
 268                         if (in_sight) {
 269                                 pline("%s is hit by a dart!",
 270                                       Monnam(mtmp));
 271                         }
 272                         mtmp->mhp -= 2;
 273                         /* not mondied here !! */
 274                         break;
 275                 case TRAPDOOR:
 276                         if (!xdnstair) {
 277                                 mtmp->mhp -= 10;
 278                                 if (in_sight)
 279                                         pline("A trap door in the ceiling opens and a rock hits %s!", monnam(mtmp));
 280                                 break;
 281                         }
 282                         if (mtmp->data->mlet != 'w') {
 283                                 fall_down(mtmp);
 284                                 if (in_sight)
 285                                         pline("Suddenly, %s disappears out of sight.", monnam(mtmp));
 286                                 return (2);     /* no longer on this level */
 287                         }
 288                         break;
 289                 case PIERC:
 290                         break;
 291                 default:
 292                         impossible("Some monster encountered a strange trap.");
 293                 }
 294         }
 295         return (mtmp->mtrapped);
 296 }
 297
 298 void
 299 selftouch(const char *arg)
 300 {
 301         if (uwep && uwep->otyp == DEAD_COCKATRICE) {
 302                 pline("%s touch the dead cockatrice.", arg);
 303                 pline("You turn to stone.");
 304                 killer = objects[uwep->otyp].oc_name;
 305                 done("died");
 306         }
 307 }
 308
 309 void
 310 float_up(void)
 311 {
 312         if (u.utrap) {
 313                 if (u.utraptype == TT_PIT) {
 314                         u.utrap = 0;
 315                         pline("You float up, out of the pit!");
 316                 } else {
 317                         pline("You float up, only your leg is still stuck.");
 318                 }
 319         } else
 320                 pline("You start to float in the air!");
 321 }
 322
 323 void
 324 float_down(void)
 325 {
 326         struct trap    *trap;
 327         pline("You float gently to the ground.");
 328         if ((trap = t_at(u.ux, u.uy)) != NULL)
 329                 switch (trap->ttyp) {
 330                 case PIERC:
 331                         break;
 332                 case TRAPDOOR:
 333                         if (!xdnstair || u.ustuck)
 334                                 break;
 335                         /* fall into next case */
 336                 default:
 337                         dotrap(trap);
 338                 }
 339         pickup(1);
 340 }
 341
 342 void
 343 vtele(void)
 344 {
 345         struct mkroom  *croom;
 346         for (croom = &rooms[0]; croom->hx >= 0; croom++)
 347                 if (croom->rtype == VAULT) {
 348                         int x, y;
 349
 350                         x = rn2(2) ? croom->lx : croom->hx;
 351                         y = rn2(2) ? croom->ly : croom->hy;
 352                         if (teleok(x, y)) {
 353                                 teleds(x, y);
 354                                 return;
 355                         }
 356                 }
 357         tele();
 358 }
 359
 360 void
 361 tele(void)
 362 {
 363         coord           cc;
 364         int             nux, nuy;
 365
 366         if (Teleport_control) {
 367                 pline("To what position do you want to be teleported?");
 368                 cc = getpos(1, "the desired position"); /* 1: force valid */
 369                 /*
 370                  * possible extensions: introduce a small error if magic
 371                  * power is low; allow transfer to solid rock
 372                  */
 373                 if (teleok(cc.x, cc.y)) {
 374                         teleds(cc.x, cc.y);
 375                         return;
 376                 }
 377                 pline("Sorry ...");
 378         }
 379         do {
 380                 nux = rnd(COLNO - 1);
 381                 nuy = rn2(ROWNO);
 382         } while (!teleok(nux, nuy));
 383         teleds(nux, nuy);
 384 }
 385
 386 void
 387 teleds(int nux, int nuy)
 388 {
 389         if (Punished)
 390                 unplacebc();
 391         unsee();
 392         u.utrap = 0;
 393         u.ustuck = 0;
 394         u.ux = nux;
 395         u.uy = nuy;
 396         setsee();
 397         if (Punished)
 398                 placebc(1);
 399         if (u.uswallow) {
 400                 u.uswldtim = u.uswallow = 0;
 401                 docrt();
 402         }
 403         nomul(0);
 404         if (levl[nux][nuy].typ == POOL && !Levitation)
 405                 drown();
 406         (void) inshop();
 407         pickup(1);
 408         if (!Blind)
 409                 read_engr_at(u.ux, u.uy);
 410 }
 411
 412 int
 413 teleok(int x, int y)
 414 {                               /* might throw him into a POOL */
 415         return (isok(x, y) && !IS_ROCK(levl[x][y].typ) && !m_at(x, y) &&
 416                 !sobj_at(ENORMOUS_ROCK, x, y) && !t_at(x, y)
 417                 );
 418         /* Note: gold is permitted (because of vaults) */
 419 }
 420
 421 int
 422 dotele(void)
 423 {
 424         if (
 425 #ifdef WIZARD
 426             !wizard &&
 427 #endif  /* WIZARD */
 428             (!Teleportation || u.ulevel < 6 ||
 429              (pl_character[0] != 'W' && u.ulevel < 10))) {
 430                 pline("You are not able to teleport at will.");
 431                 return (0);
 432         }
 433         if (u.uhunger <= 100 || u.ustr < 6) {
 434                 pline("You miss the strength for a teleport spell.");
 435                 return (1);
 436         }
 437         tele();
 438         morehungry(100);
 439         return (1);
 440 }
 441
 442 void
 443 placebc(int attach)
 444 {
 445         if (!uchain || !uball) {
 446                 impossible("Where are your chain and ball??");
 447                 return;
 448         }
 449         uball->ox = uchain->ox = u.ux;
 450         uball->oy = uchain->oy = u.uy;
 451         if (attach) {
 452                 uchain->nobj = fobj;
 453                 fobj = uchain;
 454                 if (!carried(uball)) {
 455                         uball->nobj = fobj;
 456                         fobj = uball;
 457                 }
 458         }
 459 }
 460
 461 void
 462 unplacebc(void)
 463 {
 464         if (!carried(uball)) {
 465                 freeobj(uball);
 466                 unpobj(uball);
 467         }
 468         freeobj(uchain);
 469         unpobj(uchain);
 470 }
 471
 472 void
 473 level_tele(void)
 474 {
 475         int             newlevel;
 476         if (Teleport_control) {
 477                 char            buf[BUFSZ];
 478
 479                 do {
 480                         pline("To what level do you want to teleport? [type a number] ");
 481                         getlin(buf);
 482                 } while (!digit(buf[0]) && (buf[0] != '-' || !digit(buf[1])));
 483                 newlevel = atoi(buf);
 484         } else {
 485                 newlevel = 5 + rn2(20); /* 5 - 24 */
 486                 if (dlevel == newlevel) {
 487                         if (!xdnstair)
 488                                 newlevel--;
 489                         else
 490                                 newlevel++;
 491                 }
 492         }
 493         if (newlevel >= 30) {
 494                 if (newlevel > MAXLEVEL)
 495                         newlevel = MAXLEVEL;
 496                 pline("You arrive at the center of the earth ...");
 497                 pline("Unfortunately it is here that hell is located.");
 498                 if (Fire_resistance) {
 499                         pline("But the fire doesn't seem to harm you.");
 500                 } else {
 501                         pline("You burn to a crisp.");
 502                         dlevel = maxdlevel = newlevel;
 503                         killer = "visit to the hell";
 504                         done("burned");
 505                 }
 506         }
 507         if (newlevel < 0) {
 508                 newlevel = 0;
 509                 pline("You are now high above the clouds ...");
 510                 if (Levitation) {
 511                         pline("You float gently down to earth.");
 512                         done("escaped");
 513                 }
 514                 pline("Unfortunately, you don't know how to fly.");
 515                 pline("You fall down a few thousand feet and break your neck.");
 516                 dlevel = 0;
 517                 killer = "fall";
 518                 done("died");
 519         }
 520         goto_level(newlevel, FALSE);    /* calls done("escaped") if
 521                                          * newlevel==0 */
 522 }
 523
 524 void
 525 drown(void)
 526 {
 527         pline("You fall into a pool!");
 528         pline("You can't swim!");
 529         if (rn2(3) < u.uluck + 2) {
 530                 /* most scrolls become unreadable */
 531                 struct obj     *obj;
 532
 533                 for (obj = invent; obj; obj = obj->nobj)
 534                         if (obj->olet == SCROLL_SYM && rn2(12) > u.uluck)
 535                                 obj->otyp = SCR_BLANK_PAPER;
 536                 /* we should perhaps merge these scrolls ? */
 537
 538                 pline("You attempt a teleport spell."); /* utcsri!carroll */
 539                 (void) dotele();
 540                 if (levl[u.ux][u.uy].typ != POOL)
 541                         return;
 542         }
 543         pline("You drown ...");
 544         killer = "pool of water";
 545         done("drowned");
 546 }