games/rogue/move.c

   1 /*
   2  * Copyright (c) 1988, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * This code is derived from software contributed to Berkeley by
   6  * Timothy C. Stoehr.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 3. All advertising materials mentioning features or use of this software
  17  *    must display the following acknowledgement:
  18  *      This product includes software developed by the University of
  19  *      California, Berkeley and its contributors.
  20  * 4. Neither the name of the University nor the names of its contributors
  21  *    may be used to endorse or promote products derived from this software
  22  *    without specific prior written permission.
  23  *
  24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  34  * SUCH DAMAGE.
  35  *
  36  * @(#)move.c   8.1 (Berkeley) 5/31/93
  37  * $FreeBSD: src/games/rogue/move.c,v 1.7 1999/11/30 03:49:24 billf Exp $
  38  * $DragonFly: src/games/rogue/move.c,v 1.4 2006/09/02 19:31:07 pavalos Exp $
  39  */
  40
  41 /*
  42  * move.c
  43  *
  44  * This source herein may be modified and/or distributed by anybody who
  45  * so desires, with the following restrictions:
  46  *    1.)  No portion of this notice shall be removed.
  47  *    2.)  Credit shall not be taken for the creation of this source.
  48  *    3.)  This code is not to be traded, sold, or used for personal
  49  *         gain or profit.
  50  *
  51  */
  52
  53 #include "rogue.h"
  54
  55 short m_moves = 0;
  56 boolean jump = 0;
  57 const char *you_can_move_again = "you can move again";
  58
  59 extern short cur_room, halluc, blind, levitate;
  60 extern short cur_level, max_level;
  61 extern short bear_trap, haste_self, confused;
  62 extern short e_rings, regeneration, auto_search;
  63 extern boolean being_held, interrupted, r_teleport, passgo;
  64
  65 static boolean  next_to_something(int, int);
  66 static boolean  check_hunger(boolean);
  67 static short    gr_dir(void);
  68 static void     heal(void);
  69 static boolean  can_turn(short, short);
  70 static void     turn_passage(short, boolean);
  71
  72 short
  73 one_move_rogue(short dirch, short pickup)
  74 {
  75         short row, col;
  76         object *obj;
  77         char desc[DCOLS];
  78         short n, status, d;
  79
  80         row = rogue.row;
  81         col = rogue.col;
  82
  83         if (confused) {
  84                 dirch = gr_dir();
  85         }
  86         is_direction(dirch, &d);
  87         get_dir_rc(d, &row, &col, 1);
  88
  89         if (!can_move(rogue.row, rogue.col, row, col)) {
  90                 return(MOVE_FAILED);
  91         }
  92         if (being_held || bear_trap) {
  93                 if (!(dungeon[row][col] & MONSTER)) {
  94                         if (being_held) {
  95                                 message("you are being held", 1);
  96                         } else {
  97                                 message("you are still stuck in the bear trap", 0);
  98                                 reg_move();
  99                         }
 100                         return(MOVE_FAILED);
 101                 }
 102         }
 103         if (r_teleport) {
 104                 if (rand_percent(R_TELE_PERCENT)) {
 105                         tele();
 106                         return(STOPPED_ON_SOMETHING);
 107                 }
 108         }
 109         if (dungeon[row][col] & MONSTER) {
 110                 rogue_hit(object_at(&level_monsters, row, col), 0);
 111                 reg_move();
 112                 return(MOVE_FAILED);
 113         }
 114         if (dungeon[row][col] & DOOR) {
 115                 if (cur_room == PASSAGE) {
 116                         cur_room = get_room_number(row, col);
 117                         light_up_room(cur_room);
 118                         wake_room(cur_room, 1, row, col);
 119                 } else {
 120                         light_passage(row, col);
 121                 }
 122         } else if ((dungeon[rogue.row][rogue.col] & DOOR) &&
 123                    (dungeon[row][col] & TUNNEL)) {
 124                 light_passage(row, col);
 125                 wake_room(cur_room, 0, rogue.row, rogue.col);
 126                 darken_room(cur_room);
 127                 cur_room = PASSAGE;
 128         } else if (dungeon[row][col] & TUNNEL) {
 129                         light_passage(row, col);
 130         }
 131         mvaddch(rogue.row, rogue.col, get_dungeon_char(rogue.row, rogue.col));
 132         mvaddch(row, col, rogue.fchar);
 133
 134         if (!jump) {
 135                 refresh();
 136         }
 137         rogue.row = row;
 138         rogue.col = col;
 139         if (dungeon[row][col] & OBJECT) {
 140                 if (levitate && pickup) {
 141                         return(STOPPED_ON_SOMETHING);
 142                 }
 143                 if (pickup && !levitate) {
 144                         if ((obj = pick_up(row, col, &status))) {
 145                                 get_desc(obj, desc);
 146                                 if (obj->what_is == GOLD) {
 147                                         free_object(obj);
 148                                         goto NOT_IN_PACK;
 149                                 }
 150                         } else if (!status) {
 151                                 goto MVED;
 152                         } else {
 153                                 goto MOVE_ON;
 154                         }
 155                 } else {
 156 MOVE_ON:
 157                         obj = object_at(&level_objects, row, col);
 158                         strcpy(desc, "moved onto ");
 159                         get_desc(obj, desc+11);
 160                         goto NOT_IN_PACK;
 161                 }
 162                 n = strlen(desc);
 163                 desc[n] = '(';
 164                 desc[n+1] = obj->ichar;
 165                 desc[n+2] = ')';
 166                 desc[n+3] = 0;
 167 NOT_IN_PACK:
 168                 message(desc, 1);
 169                 reg_move();
 170                 return(STOPPED_ON_SOMETHING);
 171         }
 172         if (dungeon[row][col] & (DOOR | STAIRS | TRAP)) {
 173                 if ((!levitate) && (dungeon[row][col] & TRAP)) {
 174                         trap_player(row, col);
 175                 }
 176                 reg_move();
 177                 return(STOPPED_ON_SOMETHING);
 178         }
 179 MVED:   if (reg_move()) {                       /* fainted from hunger */
 180                         return(STOPPED_ON_SOMETHING);
 181         }
 182         return((confused ? STOPPED_ON_SOMETHING : MOVED));
 183 }
 184
 185 void
 186 multiple_move_rogue(short dirch)
 187 {
 188         short row, col;
 189         short m;
 190
 191         switch(dirch) {
 192         case '\010':
 193         case '\012':
 194         case '\013':
 195         case '\014':
 196         case '\031':
 197         case '\025':
 198         case '\016':
 199         case '\002':
 200                 do {
 201                         row = rogue.row;
 202                         col = rogue.col;
 203                         if (((m = one_move_rogue((dirch + 96), 1)) == MOVE_FAILED) ||
 204                                 (m == STOPPED_ON_SOMETHING) ||
 205                                 interrupted) {
 206                                 break;
 207                         }
 208                 } while (!next_to_something(row, col));
 209                 if (    (!interrupted) && passgo && (m == MOVE_FAILED) &&
 210                                 (dungeon[rogue.row][rogue.col] & TUNNEL)) {
 211                         turn_passage(dirch + 96, 0);
 212                 }
 213                 break;
 214         case 'H':
 215         case 'J':
 216         case 'K':
 217         case 'L':
 218         case 'B':
 219         case 'Y':
 220         case 'U':
 221         case 'N':
 222                 while ((!interrupted) && (one_move_rogue((dirch + 32), 1) == MOVED)) ;
 223
 224                 if (    (!interrupted) && passgo &&
 225                                 (dungeon[rogue.row][rogue.col] & TUNNEL)) {
 226                         turn_passage(dirch + 32, 1);
 227                 }
 228                 break;
 229         }
 230 }
 231
 232 boolean
 233 is_passable(int row, int col)
 234 {
 235         if ((row < MIN_ROW) || (row > (DROWS - 2)) || (col < 0) ||
 236                 (col > (DCOLS-1))) {
 237                 return(0);
 238         }
 239         if (dungeon[row][col] & HIDDEN) {
 240                 return((dungeon[row][col] & TRAP) ? 1 : 0);
 241         }
 242         return(dungeon[row][col] & (FLOOR | TUNNEL | DOOR | STAIRS | TRAP));
 243 }
 244
 245 static boolean
 246 next_to_something(int drow, int dcol)
 247 {
 248         short i, j, i_end, j_end, row, col;
 249         short pass_count = 0;
 250         unsigned short s;
 251
 252         if (confused) {
 253                 return(1);
 254         }
 255         if (blind) {
 256                 return(0);
 257         }
 258         i_end = (rogue.row < (DROWS-2)) ? 1 : 0;
 259         j_end = (rogue.col < (DCOLS-1)) ? 1 : 0;
 260
 261         for (i = ((rogue.row > MIN_ROW) ? -1 : 0); i <= i_end; i++) {
 262                 for (j = ((rogue.col > 0) ? -1 : 0); j <= j_end; j++) {
 263                         if ((i == 0) && (j == 0)) {
 264                                 continue;
 265                         }
 266                         if (((rogue.row+i) == drow) && ((rogue.col+j) == dcol)) {
 267                                 continue;
 268                         }
 269                         row = rogue.row + i;
 270                         col = rogue.col + j;
 271                         s = dungeon[row][col];
 272                         if (s & HIDDEN) {
 273                                 continue;
 274                         }
 275                         /* If the rogue used to be right, up, left, down, or right of
 276                          * row,col, and now isn't, then don't stop */
 277                         if (s & (MONSTER | OBJECT | STAIRS)) {
 278                                 if (((row == drow) || (col == dcol)) &&
 279                                         (!((row == rogue.row) || (col == rogue.col)))) {
 280                                         continue;
 281                                 }
 282                                 return(1);
 283                         }
 284                         if (s & TRAP) {
 285                                 if (!(s & HIDDEN)) {
 286                                         if (((row == drow) || (col == dcol)) &&
 287                                                 (!((row == rogue.row) || (col == rogue.col)))) {
 288                                                 continue;
 289                                         }
 290                                         return(1);
 291                                 }
 292                         }
 293                         if ((((i - j) == 1) || ((i - j) == -1)) && (s & TUNNEL)) {
 294                                 if (++pass_count > 1) {
 295                                         return(1);
 296                                 }
 297                         }
 298                         if ((s & DOOR) && ((i == 0) || (j == 0))) {
 299                                         return(1);
 300                         }
 301                 }
 302         }
 303         return(0);
 304 }
 305
 306 boolean
 307 can_move(short row1, short col1, short row2, short col2)
 308 {
 309         if (!is_passable(row2, col2)) {
 310                 return(0);
 311         }
 312         if ((row1 != row2) && (col1 != col2)) {
 313                 if ((dungeon[row1][col1] & DOOR) || (dungeon[row2][col2] & DOOR)) {
 314                         return(0);
 315                 }
 316                 if ((!dungeon[row1][col2]) || (!dungeon[row2][col1])) {
 317                         return(0);
 318                 }
 319         }
 320         return(1);
 321 }
 322
 323 void
 324 move_onto(void)
 325 {
 326         short ch, d;
 327         boolean first_miss = 1;
 328
 329         while (!is_direction(ch = rgetchar(), &d)) {
 330                 sound_bell();
 331                 if (first_miss) {
 332                         message("direction? ", 0);
 333                         first_miss = 0;
 334                 }
 335         }
 336         check_message();
 337         if (ch != CANCEL) {
 338                 one_move_rogue(ch, 0);
 339         }
 340 }
 341
 342 boolean
 343 is_direction(short c, short *d)
 344 {
 345         switch(c) {
 346         case 'h':
 347                 *d = LEFT;
 348                 break;
 349         case 'j':
 350                 *d = DOWN;
 351                 break;
 352         case 'k':
 353                 *d = UPWARD;
 354                 break;
 355         case 'l':
 356                 *d = RIGHT;
 357                 break;
 358         case 'b':
 359                 *d = DOWNLEFT;
 360                 break;
 361         case 'y':
 362                 *d = UPLEFT;
 363                 break;
 364         case 'u':
 365                 *d = UPRIGHT;
 366                 break;
 367         case 'n':
 368                 *d = DOWNRIGHT;
 369                 break;
 370         case CANCEL:
 371                 break;
 372         default:
 373                 return(0);
 374         }
 375         return(1);
 376 }
 377
 378 static boolean
 379 check_hunger(boolean msg_only)
 380 {
 381         short i, n;
 382         boolean fainted = 0;
 383
 384         if (rogue.moves_left == HUNGRY) {
 385                 strcpy(hunger_str, "hungry");
 386                 message(hunger_str, 0);
 387                 print_stats(STAT_HUNGER);
 388         }
 389         if (rogue.moves_left == WEAK) {
 390                 strcpy(hunger_str, "weak");
 391                 message(hunger_str, 1);
 392                 print_stats(STAT_HUNGER);
 393         }
 394         if (rogue.moves_left <= FAINT) {
 395                 if (rogue.moves_left == FAINT) {
 396                         strcpy(hunger_str, "faint");
 397                         message(hunger_str, 1);
 398                         print_stats(STAT_HUNGER);
 399                 }
 400                 n = get_rand(0, (FAINT - rogue.moves_left));
 401                 if (n > 0) {
 402                         fainted = 1;
 403                         if (rand_percent(40)) {
 404                                 rogue.moves_left++;
 405                         }
 406                         message("you faint", 1);
 407                         for (i = 0; i < n; i++) {
 408                                 if (coin_toss()) {
 409                                         mv_mons();
 410                                 }
 411                         }
 412                         message(you_can_move_again, 1);
 413                 }
 414         }
 415         if (msg_only) {
 416                 return(fainted);
 417         }
 418         if (rogue.moves_left <= STARVE) {
 419                 killed_by(NULL, STARVATION);
 420         }
 421
 422         switch(e_rings) {
 423         case -1:
 424                 rogue.moves_left -= (rogue.moves_left % 2);
 425                 break;
 426         case 0:
 427                 rogue.moves_left--;
 428                 break;
 429         case 1:
 430                 rogue.moves_left--;
 431                 check_hunger(1);
 432                 rogue.moves_left -= (rogue.moves_left % 2);
 433                 break;
 434         case 2:
 435                 rogue.moves_left--;
 436                 check_hunger(1);
 437                 rogue.moves_left--;
 438                 break;
 439         }
 440         return(fainted);
 441 }
 442
 443 boolean
 444 reg_move(void)
 445 {
 446         boolean fainted;
 447
 448         if ((rogue.moves_left <= HUNGRY) || (cur_level >= max_level)) {
 449                 fainted = check_hunger(0);
 450         } else {
 451                 fainted = 0;
 452         }
 453
 454         mv_mons();
 455
 456         if (++m_moves >= 120) {
 457                 m_moves = 0;
 458                 wanderer();
 459         }
 460         if (halluc) {
 461                 if (!(--halluc)) {
 462                         unhallucinate();
 463                 } else {
 464                         hallucinate();
 465                 }
 466         }
 467         if (blind) {
 468                 if (!(--blind)) {
 469                         unblind();
 470                 }
 471         }
 472         if (confused) {
 473                 if (!(--confused)) {
 474                         unconfuse();
 475                 }
 476         }
 477         if (bear_trap) {
 478                 bear_trap--;
 479         }
 480         if (levitate) {
 481                 if (!(--levitate)) {
 482                         message("you float gently to the ground", 1);
 483                         if (dungeon[rogue.row][rogue.col] & TRAP) {
 484                                 trap_player(rogue.row, rogue.col);
 485                         }
 486                 }
 487         }
 488         if (haste_self) {
 489                 if (!(--haste_self)) {
 490                         message("you feel yourself slowing down", 0);
 491                 }
 492         }
 493         heal();
 494         if (auto_search > 0) {
 495                 search(auto_search, auto_search);
 496         }
 497         return(fainted);
 498 }
 499
 500 void
 501 rest(int count)
 502 {
 503         int i;
 504
 505         interrupted = 0;
 506
 507         for (i = 0; i < count; i++) {
 508                 if (interrupted) {
 509                         break;
 510                 }
 511                 reg_move();
 512         }
 513 }
 514
 515 static short
 516 gr_dir(void)
 517 {
 518         short d;
 519
 520         d = get_rand(1, 8);
 521
 522         switch(d) {
 523                 case 1:
 524                         d = 'j';
 525                         break;
 526                 case 2:
 527                         d = 'k';
 528                         break;
 529                 case 3:
 530                         d = 'l';
 531                         break;
 532                 case 4:
 533                         d = 'h';
 534                         break;
 535                 case 5:
 536                         d = 'y';
 537                         break;
 538                 case 6:
 539                         d = 'u';
 540                         break;
 541                 case 7:
 542                         d = 'b';
 543                         break;
 544                 case 8:
 545                         d = 'n';
 546                         break;
 547         }
 548         return(d);
 549 }
 550
 551 static void
 552 heal(void)
 553 {
 554         static short heal_exp = -1, n, c = 0;
 555         static boolean alt;
 556
 557         if (rogue.hp_current == rogue.hp_max) {
 558                 c = 0;
 559                 return;
 560         }
 561         if (rogue.exp != heal_exp) {
 562                 heal_exp = rogue.exp;
 563
 564                 switch(heal_exp) {
 565                 case 1:
 566                         n = 20;
 567                         break;
 568                 case 2:
 569                         n = 18;
 570                         break;
 571                 case 3:
 572                         n = 17;
 573                         break;
 574                 case 4:
 575                         n = 14;
 576                         break;
 577                 case 5:
 578                         n = 13;
 579                         break;
 580                 case 6:
 581                         n = 10;
 582                         break;
 583                 case 7:
 584                         n = 9;
 585                         break;
 586                 case 8:
 587                         n = 8;
 588                         break;
 589                 case 9:
 590                         n = 7;
 591                         break;
 592                 case 10:
 593                         n = 4;
 594                         break;
 595                 case 11:
 596                         n = 3;
 597                         break;
 598                 case 12:
 599                 default:
 600                         n = 2;
 601                 }
 602         }
 603         if (++c >= n) {
 604                 c = 0;
 605                 rogue.hp_current++;
 606                 if ((alt = !alt)) {
 607                         rogue.hp_current++;
 608                 }
 609                 if ((rogue.hp_current += regeneration) > rogue.hp_max) {
 610                         rogue.hp_current = rogue.hp_max;
 611                 }
 612                 print_stats(STAT_HP);
 613         }
 614 }
 615
 616 static boolean
 617 can_turn(short nrow, short ncol)
 618 {
 619         if ((dungeon[nrow][ncol] & TUNNEL) && is_passable(nrow, ncol)) {
 620                 return(1);
 621         }
 622         return(0);
 623 }
 624
 625 static void
 626 turn_passage(short dir, boolean fast)
 627 {
 628         short crow = rogue.row, ccol = rogue.col, turns = 0;
 629         short ndir = 0;
 630
 631         if ((dir != 'h') && can_turn(crow, ccol + 1)) {
 632                 turns++;
 633                 ndir = 'l';
 634         }
 635         if ((dir != 'l') && can_turn(crow, ccol - 1)) {
 636                 turns++;
 637                 ndir = 'h';
 638         }
 639         if ((dir != 'k') && can_turn(crow + 1, ccol)) {
 640                 turns++;
 641                 ndir = 'j';
 642         }
 643         if ((dir != 'j') && can_turn(crow - 1, ccol)) {
 644                 turns++;
 645                 ndir = 'k';
 646         }
 647         if (turns == 1) {
 648                 multiple_move_rogue(ndir - (fast ? 32 : 96));
 649         }
 650 }