games/rogue/spec_hit.c

   1 /*      $NetBSD: spec_hit.c,v 1.7 2008/01/14 00:23:53 dholland Exp $    */
   2
   3 /*
   4  * Copyright (c) 1988, 1993
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * This code is derived from software contributed to Berkeley by
   8  * Timothy C. Stoehr.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. 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  * 3. Neither the name of the University nor the names of its contributors
  19  *    may be used to endorse or promote products derived from this software
  20  *    without specific prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  32  * SUCH DAMAGE.
  33  */
  34
  35 #include <sys/cdefs.h>
  36 #ifndef lint
  37 #if 0
  38 static char sccsid[] = "@(#)spec_hit.c  8.1 (Berkeley) 5/31/93";
  39 #else
  40 __RCSID("$NetBSD: spec_hit.c,v 1.7 2008/01/14 00:23:53 dholland Exp $");
  41 #endif
  42 #endif /* not lint */
  43
  44 /*
  45  * special_hit.c
  46  *
  47  * This source herein may be modified and/or distributed by anybody who
  48  * so desires, with the following restrictions:
  49  *    1.)  No portion of this notice shall be removed.
  50  *    2.)  Credit shall not be taken for the creation of this source.
  51  *    3.)  This code is not to be traded, sold, or used for personal
  52  *         gain or profit.
  53  *
  54  */
  55
  56 #include "rogue.h"
  57
  58 static void     disappear(object *);
  59 static void     drain_life(void);
  60 static void     drop_level(void);
  61 static void     freeze(object *);
  62 static int      get_dir(short, short, short, short);
  63 static boolean  gold_at(short, short);
  64 static void     steal_gold(object *);
  65 static void     steal_item(object *);
  66 static void     sting(object *);
  67 static boolean  try_to_cough(short, short, object *);
  68
  69 short less_hp = 0;
  70 boolean being_held;
  71
  72 void
  73 special_hit(object *monster)
  74 {
  75         if ((monster->m_flags & CONFUSED) && rand_percent(66)) {
  76                 return;
  77         }
  78         if (monster->m_flags & RUSTS) {
  79                 rust(monster);
  80         }
  81         if ((monster->m_flags & HOLDS) && !levitate) {
  82                 being_held = 1;
  83         }
  84         if (monster->m_flags & FREEZES) {
  85                 freeze(monster);
  86         }
  87         if (monster->m_flags & STINGS) {
  88                 sting(monster);
  89         }
  90         if (monster->m_flags & DRAINS_LIFE) {
  91                 drain_life();
  92         }
  93         if (monster->m_flags & DROPS_LEVEL) {
  94                 drop_level();
  95         }
  96         if (monster->m_flags & STEALS_GOLD) {
  97                 steal_gold(monster);
  98         } else if (monster->m_flags & STEALS_ITEM) {
  99                 steal_item(monster);
 100         }
 101 }
 102
 103 void
 104 rust(object *monster)
 105 {
 106         if ((!rogue.armor) || (get_armor_class(rogue.armor) <= 1) ||
 107                 (rogue.armor->which_kind == LEATHER)) {
 108                 return;
 109         }
 110         if ((rogue.armor->is_protected) || maintain_armor) {
 111                 if (monster && (!(monster->m_flags & RUST_VANISHED))) {
 112                         messagef(0, "the rust vanishes instantly");
 113                         monster->m_flags |= RUST_VANISHED;
 114                 }
 115         } else {
 116                 rogue.armor->d_enchant--;
 117                 messagef(0, "your armor weakens");
 118                 print_stats(STAT_ARMOR);
 119         }
 120 }
 121
 122 void
 123 freeze(object *monster)
 124 {
 125         short freeze_percent = 99;
 126         short i, n;
 127
 128         if (rand_percent(12)) {
 129                 return;
 130         }
 131         freeze_percent -= (rogue.str_current+(rogue.str_current / 2));
 132         freeze_percent -= ((rogue.exp + ring_exp) * 4);
 133         freeze_percent -= (get_armor_class(rogue.armor) * 5);
 134         freeze_percent -= (rogue.hp_max / 3);
 135
 136         if (freeze_percent > 10) {
 137                 monster->m_flags |= FREEZING_ROGUE;
 138                 messagef(1, "you are frozen");
 139
 140                 n = get_rand(4, 8);
 141                 for (i = 0; i < n; i++) {
 142                         mv_mons();
 143                 }
 144                 if (rand_percent(freeze_percent)) {
 145                         for (i = 0; i < 50; i++) {
 146                                 mv_mons();
 147                         }
 148                         killed_by(NULL, HYPOTHERMIA);
 149                 }
 150                 messagef(1, you_can_move_again);
 151                 monster->m_flags &= (~FREEZING_ROGUE);
 152         }
 153 }
 154
 155 void
 156 steal_gold(object *monster)
 157 {
 158         int amount;
 159
 160         if ((rogue.gold <= 0) || rand_percent(10)) {
 161                 return;
 162         }
 163
 164         amount = get_rand((cur_level * 10), (cur_level * 30));
 165
 166         if (amount > rogue.gold) {
 167                 amount = rogue.gold;
 168         }
 169         rogue.gold -= amount;
 170         messagef(0, "your purse feels lighter");
 171         print_stats(STAT_GOLD);
 172         disappear(monster);
 173 }
 174
 175 void
 176 steal_item(object *monster)
 177 {
 178         object *obj;
 179         short i, n, t = 0;
 180         char desc[80];
 181         boolean has_something = 0;
 182
 183         if (rand_percent(15)) {
 184                 return;
 185         }
 186         obj = rogue.pack.next_object;
 187
 188         if (!obj) {
 189                 goto DSPR;
 190         }
 191         while (obj) {
 192                 if (!(obj->in_use_flags & BEING_USED)) {
 193                         has_something = 1;
 194                         break;
 195                 }
 196                 obj = obj->next_object;
 197         }
 198         if (!has_something) {
 199                 goto DSPR;
 200         }
 201         n = get_rand(0, MAX_PACK_COUNT);
 202         obj = rogue.pack.next_object;
 203
 204         for (i = 0; i <= n; i++) {
 205                 obj = obj->next_object;
 206                 while ((!obj) || (obj->in_use_flags & BEING_USED)) {
 207                         if (!obj) {
 208                                 obj = rogue.pack.next_object;
 209                         } else {
 210                                 obj = obj->next_object;
 211                         }
 212                 }
 213         }
 214         if (obj->what_is != WEAPON) {
 215                 t = obj->quantity;
 216                 obj->quantity = 1;
 217         }
 218         get_desc(obj, desc, sizeof(desc));
 219         messagef(0, "she stole %s", desc);
 220
 221         obj->quantity = ((obj->what_is != WEAPON) ? t : 1);
 222
 223         vanish(obj, 0, &rogue.pack);
 224 DSPR:
 225         disappear(monster);
 226 }
 227
 228 static void
 229 disappear(object *monster)
 230 {
 231         short row, col;
 232
 233         row = monster->row;
 234         col = monster->col;
 235
 236         dungeon[row][col] &= ~MONSTER;
 237         if (rogue_can_see(row, col)) {
 238                 mvaddch(row, col, get_dungeon_char(row, col));
 239         }
 240         take_from_pack(monster, &level_monsters);
 241         free_object(monster);
 242         mon_disappeared = 1;
 243 }
 244
 245 void
 246 cough_up(object *monster)
 247 {
 248         object *obj;
 249         short row, col, i, n;
 250
 251         if (cur_level < max_level) {
 252                 return;
 253         }
 254
 255         if (monster->m_flags & STEALS_GOLD) {
 256                 obj = alloc_object();
 257                 obj->what_is = GOLD;
 258                 obj->quantity = get_rand((cur_level * 15), (cur_level * 30));
 259         } else {
 260                 if (!rand_percent((int)monster->drop_percent)) {
 261                         return;
 262                 }
 263                 obj = gr_object();
 264         }
 265         row = monster->row;
 266         col = monster->col;
 267
 268         for (n = 0; n <= 5; n++) {
 269                 for (i = -n; i <= n; i++) {
 270                         if (try_to_cough(row+n, col+i, obj)) {
 271                                 return;
 272                         }
 273                         if (try_to_cough(row-n, col+i, obj)) {
 274                                 return;
 275                         }
 276                 }
 277                 for (i = -n; i <= n; i++) {
 278                         if (try_to_cough(row+i, col-n, obj)) {
 279                                 return;
 280                         }
 281                         if (try_to_cough(row+i, col+n, obj)) {
 282                                 return;
 283                         }
 284                 }
 285         }
 286         free_object(obj);
 287 }
 288
 289 static boolean
 290 try_to_cough(short row, short col, object *obj)
 291 {
 292         if ((row < MIN_ROW) ||
 293             (row > (DROWS-2)) || (col < 0) || (col>(DCOLS-1))) {
 294                 return(0);
 295         }
 296         if ((!(dungeon[row][col] & (OBJECT | STAIRS | TRAP))) &&
 297                 (dungeon[row][col] & (TUNNEL | FLOOR | DOOR))) {
 298                 place_at(obj, row, col);
 299                 if (((row != rogue.row) || (col != rogue.col)) &&
 300                         (!(dungeon[row][col] & MONSTER))) {
 301                         mvaddch(row, col, get_dungeon_char(row, col));
 302                 }
 303                 return(1);
 304         }
 305         return(0);
 306 }
 307
 308 boolean
 309 seek_gold(object *monster)
 310 {
 311         short i, j, rn, s;
 312
 313         if ((rn = get_room_number(monster->row, monster->col)) < 0) {
 314                 return(0);
 315         }
 316         for (i = rooms[rn].top_row+1; i < rooms[rn].bottom_row; i++) {
 317                 for (j = rooms[rn].left_col+1; j < rooms[rn].right_col; j++) {
 318                         if ((gold_at(i, j)) && !(dungeon[i][j] & MONSTER)) {
 319                                 monster->m_flags |= CAN_FLIT;
 320                                 s = mon_can_go(monster, i, j);
 321                                 monster->m_flags &= (~CAN_FLIT);
 322                                 if (s) {
 323                                         move_mon_to(monster, i, j);
 324                                         monster->m_flags |= ASLEEP;
 325                                         monster->m_flags &= (~(WAKENS | SEEKS_GOLD));
 326                                         return(1);
 327                                 }
 328                                 monster->m_flags &= (~SEEKS_GOLD);
 329                                 monster->m_flags |= CAN_FLIT;
 330                                 mv_1_monster(monster, i, j);
 331                                 monster->m_flags &= (~CAN_FLIT);
 332                                 monster->m_flags |= SEEKS_GOLD;
 333                                 return(1);
 334                         }
 335                 }
 336         }
 337         return(0);
 338 }
 339
 340 static boolean
 341 gold_at(short row, short col)
 342 {
 343         if (dungeon[row][col] & OBJECT) {
 344                 object *obj;
 345
 346                 if ((obj = object_at(&level_objects, row, col)) &&
 347                                 (obj->what_is == GOLD)) {
 348                         return(1);
 349                 }
 350         }
 351         return(0);
 352 }
 353
 354 void
 355 check_gold_seeker(object *monster)
 356 {
 357         monster->m_flags &= (~SEEKS_GOLD);
 358 }
 359
 360 boolean
 361 check_imitator(object *monster)
 362 {
 363         if (monster->m_flags & IMITATES) {
 364                 wake_up(monster);
 365                 if (!blind) {
 366                         mvaddch(monster->row, monster->col,
 367                                         get_dungeon_char(monster->row, monster->col));
 368                         check_message();
 369                         messagef(1, "wait, that's a %s!", mon_name(monster));
 370                 }
 371                 return(1);
 372         }
 373         return(0);
 374 }
 375
 376 boolean
 377 imitating(short row, short col)
 378 {
 379         if (dungeon[row][col] & MONSTER) {
 380                 object *monster;
 381
 382                 if ((monster = object_at(&level_monsters, row, col)) != NULL) {
 383                         if (monster->m_flags & IMITATES) {
 384                                 return(1);
 385                         }
 386                 }
 387         }
 388         return(0);
 389 }
 390
 391 static void
 392 sting(object *monster)
 393 {
 394         short sting_chance = 35;
 395
 396         if ((rogue.str_current <= 3) || sustain_strength) {
 397                 return;
 398         }
 399         sting_chance += (6 * (6 - get_armor_class(rogue.armor)));
 400
 401         if ((rogue.exp + ring_exp) > 8) {
 402                 sting_chance -= (6 * ((rogue.exp + ring_exp) - 8));
 403         }
 404         if (rand_percent(sting_chance)) {
 405                 messagef(0, "the %s's bite has weakened you",
 406                         mon_name(monster));
 407                 rogue.str_current--;
 408                 print_stats(STAT_STRENGTH);
 409         }
 410 }
 411
 412 static void
 413 drop_level(void)
 414 {
 415         int hp;
 416
 417         if (rand_percent(80) || (rogue.exp <= 5)) {
 418                 return;
 419         }
 420         rogue.exp_points = level_points[rogue.exp-2] - get_rand(9, 29);
 421         rogue.exp -= 2;
 422         hp = hp_raise();
 423         if ((rogue.hp_current -= hp) <= 0) {
 424                 rogue.hp_current = 1;
 425         }
 426         if ((rogue.hp_max -= hp) <= 0) {
 427                 rogue.hp_max = 1;
 428         }
 429         add_exp(1, 0);
 430 }
 431
 432 void
 433 drain_life(void)
 434 {
 435         short n;
 436
 437         if (rand_percent(60) || (rogue.hp_max <= 30) || (rogue.hp_current < 10)) {
 438                 return;
 439         }
 440         n = get_rand(1, 3);             /* 1 Hp, 2 Str, 3 both */
 441
 442         if ((n != 2) || (!sustain_strength)) {
 443                 messagef(0, "you feel weaker");
 444         }
 445         if (n != 2) {
 446                 rogue.hp_max--;
 447                 rogue.hp_current--;
 448                 less_hp++;
 449         }
 450         if (n != 1) {
 451                 if ((rogue.str_current > 3) && (!sustain_strength)) {
 452                         rogue.str_current--;
 453                         if (coin_toss()) {
 454                                 rogue.str_max--;
 455                         }
 456                 }
 457         }
 458         print_stats((STAT_STRENGTH | STAT_HP));
 459 }
 460
 461 boolean
 462 m_confuse(object *monster)
 463 {
 464         if (!rogue_can_see(monster->row, monster->col)) {
 465                 return(0);
 466         }
 467         if (rand_percent(45)) {
 468                 monster->m_flags &= (~CONFUSES);        /* will not confuse the rogue */
 469                 return(0);
 470         }
 471         if (rand_percent(55)) {
 472                 monster->m_flags &= (~CONFUSES);
 473                 messagef(1, "the gaze of the %s has confused you",
 474                         mon_name(monster));
 475                 cnfs();
 476                 return(1);
 477         }
 478         return(0);
 479 }
 480
 481 boolean
 482 flame_broil(object *monster)
 483 {
 484         short row, col, dir;
 485
 486         if ((!mon_sees(monster, rogue.row, rogue.col)) || coin_toss()) {
 487                 return(0);
 488         }
 489         row = rogue.row - monster->row;
 490         col = rogue.col - monster->col;
 491         if (row < 0) {
 492                 row = -row;
 493         }
 494         if (col < 0) {
 495                 col = -col;
 496         }
 497         if (((row != 0) && (col != 0) && (row != col)) ||
 498                 ((row > 7) || (col > 7))) {
 499                 return(0);
 500         }
 501         dir = get_dir(monster->row, monster->col, row, col);
 502         bounce(FIRE, dir, monster->row, monster->col, 0);
 503
 504         return(1);
 505 }
 506
 507 static int
 508 get_dir(short srow, short scol, short drow, short dcol)
 509 {
 510         if (srow == drow) {
 511                 if (scol < dcol) {
 512                         return(RIGHT);
 513                 } else {
 514                         return(LEFT);
 515                 }
 516         }
 517         if (scol == dcol) {
 518                 if (srow < drow) {
 519                         return(DOWN);
 520                 } else {
 521                         return(UPWARD);
 522                 }
 523         }
 524         if ((srow > drow) && (scol > dcol)) {
 525                 return(UPLEFT);
 526         }
 527         if ((srow < drow) && (scol < dcol)) {
 528                 return(DOWNRIGHT);
 529         }
 530         if ((srow < drow) && (scol > dcol)) {
 531                 return(DOWNLEFT);
 532         }
 533         /*if ((srow > drow) && (scol < dcol)) {*/
 534                 return(UPRIGHT);
 535         /*}*/
 536 }