games/rogue/spec_hit.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  * @(#)spec_hit.c       8.1 (Berkeley) 5/31/93
  37  * $FreeBSD: src/games/rogue/spec_hit.c,v 1.4 1999/11/30 03:49:28 billf Exp $
  38  * $DragonFly: src/games/rogue/spec_hit.c,v 1.2 2003/06/17 04:25:25 dillon Exp $
  39  */
  40
  41 /*
  42  * special_hit.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 less_hp = 0;
  56 boolean being_held;
  57
  58 extern short cur_level, max_level, blind, levitate, ring_exp;
  59 extern long level_points[];
  60 extern boolean detect_monster, mon_disappeared;
  61 extern boolean sustain_strength, maintain_armor;
  62 extern char *you_can_move_again;
  63
  64 special_hit(monster)
  65 object *monster;
  66 {
  67         if ((monster->m_flags & CONFUSED) && rand_percent(66)) {
  68                 return;
  69         }
  70         if (monster->m_flags & RUSTS) {
  71                 rust(monster);
  72         }
  73         if ((monster->m_flags & HOLDS) && !levitate) {
  74                 being_held = 1;
  75         }
  76         if (monster->m_flags & FREEZES) {
  77                 freeze(monster);
  78         }
  79         if (monster->m_flags & STINGS) {
  80                 sting(monster);
  81         }
  82         if (monster->m_flags & DRAINS_LIFE) {
  83                 drain_life();
  84         }
  85         if (monster->m_flags & DROPS_LEVEL) {
  86                 drop_level();
  87         }
  88         if (monster->m_flags & STEALS_GOLD) {
  89                 steal_gold(monster);
  90         } else if (monster->m_flags & STEALS_ITEM) {
  91                 steal_item(monster);
  92         }
  93 }
  94
  95 rust(monster)
  96 object *monster;
  97 {
  98         if ((!rogue.armor) || (get_armor_class(rogue.armor) <= 1) ||
  99                 (rogue.armor->which_kind == LEATHER)) {
 100                 return;
 101         }
 102         if ((rogue.armor->is_protected) || maintain_armor) {
 103                 if (monster && (!(monster->m_flags & RUST_VANISHED))) {
 104                         message("the rust vanishes instantly", 0);
 105                         monster->m_flags |= RUST_VANISHED;
 106                 }
 107         } else {
 108                 rogue.armor->d_enchant--;
 109                 message("your armor weakens", 0);
 110                 print_stats(STAT_ARMOR);
 111         }
 112 }
 113
 114 freeze(monster)
 115 object *monster;
 116 {
 117         short freeze_percent = 99;
 118         short i, n;
 119
 120         if (rand_percent(12)) {
 121                 return;
 122         }
 123         freeze_percent -= (rogue.str_current+(rogue.str_current / 2));
 124         freeze_percent -= ((rogue.exp + ring_exp) * 4);
 125         freeze_percent -= (get_armor_class(rogue.armor) * 5);
 126         freeze_percent -= (rogue.hp_max / 3);
 127
 128         if (freeze_percent > 10) {
 129                 monster->m_flags |= FREEZING_ROGUE;
 130                 message("you are frozen", 1);
 131
 132                 n = get_rand(4, 8);
 133                 for (i = 0; i < n; i++) {
 134                         mv_mons();
 135                 }
 136                 if (rand_percent(freeze_percent)) {
 137                         for (i = 0; i < 50; i++) {
 138                                 mv_mons();
 139                         }
 140                         killed_by((object *)0, HYPOTHERMIA);
 141                 }
 142                 message(you_can_move_again, 1);
 143                 monster->m_flags &= (~FREEZING_ROGUE);
 144         }
 145 }
 146
 147 steal_gold(monster)
 148 object *monster;
 149 {
 150         int amount;
 151
 152         if ((rogue.gold <= 0) || rand_percent(10)) {
 153                 return;
 154         }
 155
 156         amount = get_rand((cur_level * 10), (cur_level * 30));
 157
 158         if (amount > rogue.gold) {
 159                 amount = rogue.gold;
 160         }
 161         rogue.gold -= amount;
 162         message("your purse feels lighter", 0);
 163         print_stats(STAT_GOLD);
 164         disappear(monster);
 165 }
 166
 167 steal_item(monster)
 168 object *monster;
 169 {
 170         object *obj;
 171         short i, n, t;
 172         char desc[80];
 173         boolean has_something = 0;
 174
 175         if (rand_percent(15)) {
 176                 return;
 177         }
 178         obj = rogue.pack.next_object;
 179
 180         if (!obj) {
 181                 goto DSPR;
 182         }
 183         while (obj) {
 184                 if (!(obj->in_use_flags & BEING_USED)) {
 185                         has_something = 1;
 186                         break;
 187                 }
 188                 obj = obj->next_object;
 189         }
 190         if (!has_something) {
 191                 goto DSPR;
 192         }
 193         n = get_rand(0, MAX_PACK_COUNT);
 194         obj = rogue.pack.next_object;
 195
 196         for (i = 0; i <= n; i++) {
 197                 obj = obj->next_object;
 198                 while ((!obj) || (obj->in_use_flags & BEING_USED)) {
 199                         if (!obj) {
 200                                 obj = rogue.pack.next_object;
 201                         } else {
 202                                 obj = obj->next_object;
 203                         }
 204                 }
 205         }
 206         (void) strcpy(desc, "she stole ");
 207         if (obj->what_is != WEAPON) {
 208                 t = obj->quantity;
 209                 obj->quantity = 1;
 210         }
 211         get_desc(obj, desc+10);
 212         message(desc, 0);
 213
 214         obj->quantity = ((obj->what_is != WEAPON) ? t : 1);
 215
 216         vanish(obj, 0, &rogue.pack);
 217 DSPR:
 218         disappear(monster);
 219 }
 220
 221 disappear(monster)
 222 object *monster;
 223 {
 224         short row, col;
 225
 226         row = monster->row;
 227         col = monster->col;
 228
 229         dungeon[row][col] &= ~MONSTER;
 230         if (rogue_can_see(row, col)) {
 231                 mvaddch(row, col, get_dungeon_char(row, col));
 232         }
 233         take_from_pack(monster, &level_monsters);
 234         free_object(monster);
 235         mon_disappeared = 1;
 236 }
 237
 238 cough_up(monster)
 239 object *monster;
 240 {
 241         object *obj;
 242         short row, col, i, n;
 243
 244         if (cur_level < max_level) {
 245                 return;
 246         }
 247
 248         if (monster->m_flags & STEALS_GOLD) {
 249                 obj = alloc_object();
 250                 obj->what_is = GOLD;
 251                 obj->quantity = get_rand((cur_level * 15), (cur_level * 30));
 252         } else {
 253                 if (!rand_percent((int) monster->drop_percent)) {
 254                         return;
 255                 }
 256                 obj = gr_object();
 257         }
 258         row = monster->row;
 259         col = monster->col;
 260
 261         for (n = 0; n <= 5; n++) {
 262                 for (i = -n; i <= n; i++) {
 263                         if (try_to_cough(row+n, col+i, obj)) {
 264                                 return;
 265                         }
 266                         if (try_to_cough(row-n, col+i, obj)) {
 267                                 return;
 268                         }
 269                 }
 270                 for (i = -n; i <= n; i++) {
 271                         if (try_to_cough(row+i, col-n, obj)) {
 272                                 return;
 273                         }
 274                         if (try_to_cough(row+i, col+n, obj)) {
 275                                 return;
 276                         }
 277                 }
 278         }
 279         free_object(obj);
 280 }
 281
 282 try_to_cough(row, col, obj)
 283 short row, col;
 284 object *obj;
 285 {
 286         if ((row < MIN_ROW) || (row > (DROWS-2)) || (col < 0) || (col>(DCOLS-1))) {
 287                 return(0);
 288         }
 289         if ((!(dungeon[row][col] & (OBJECT | STAIRS | TRAP))) &&
 290                 (dungeon[row][col] & (TUNNEL | FLOOR | DOOR))) {
 291                 place_at(obj, row, col);
 292                 if (((row != rogue.row) || (col != rogue.col)) &&
 293                         (!(dungeon[row][col] & MONSTER))) {
 294                         mvaddch(row, col, get_dungeon_char(row, col));
 295                 }
 296                 return(1);
 297         }
 298         return(0);
 299 }
 300
 301 seek_gold(monster)
 302 object *monster;
 303 {
 304         short i, j, rn, s;
 305
 306         if ((rn = get_room_number(monster->row, monster->col)) < 0) {
 307                 return(0);
 308         }
 309         for (i = rooms[rn].top_row+1; i < rooms[rn].bottom_row; i++) {
 310                 for (j = rooms[rn].left_col+1; j < rooms[rn].right_col; j++) {
 311                         if ((gold_at(i, j)) && !(dungeon[i][j] & MONSTER)) {
 312                                 monster->m_flags |= CAN_FLIT;
 313                                 s = mon_can_go(monster, i, j);
 314                                 monster->m_flags &= (~CAN_FLIT);
 315                                 if (s) {
 316                                         move_mon_to(monster, i, j);
 317                                         monster->m_flags |= ASLEEP;
 318                                         monster->m_flags &= (~(WAKENS | SEEKS_GOLD));
 319                                         return(1);
 320                                 }
 321                                 monster->m_flags &= (~SEEKS_GOLD);
 322                                 monster->m_flags |= CAN_FLIT;
 323                                 mv_1_monster(monster, i, j);
 324                                 monster->m_flags &= (~CAN_FLIT);
 325                                 monster->m_flags |= SEEKS_GOLD;
 326                                 return(1);
 327                         }
 328                 }
 329         }
 330         return(0);
 331 }
 332
 333 gold_at(row, col)
 334 short row, col;
 335 {
 336         if (dungeon[row][col] & OBJECT) {
 337                 object *obj;
 338
 339                 if ((obj = object_at(&level_objects, row, col)) &&
 340                                 (obj->what_is == GOLD)) {
 341                         return(1);
 342                 }
 343         }
 344         return(0);
 345 }
 346
 347 check_gold_seeker(monster)
 348 object *monster;
 349 {
 350         monster->m_flags &= (~SEEKS_GOLD);
 351 }
 352
 353 check_imitator(monster)
 354 object *monster;
 355 {
 356         char msg[80];
 357
 358         if (monster->m_flags & IMITATES) {
 359                 wake_up(monster);
 360                 if (!blind) {
 361                         mvaddch(monster->row, monster->col,
 362                                         get_dungeon_char(monster->row, monster->col));
 363                         check_message();
 364                         sprintf(msg, "wait, that's a %s!", mon_name(monster));
 365                         message(msg, 1);
 366                 }
 367                 return(1);
 368         }
 369         return(0);
 370 }
 371
 372 imitating(row, col)
 373 short row, col;
 374 {
 375         if (dungeon[row][col] & MONSTER) {
 376                 object *object_at(), *monster;
 377
 378                 if (monster = object_at(&level_monsters, row, col)) {
 379                         if (monster->m_flags & IMITATES) {
 380                                 return(1);
 381                         }
 382                 }
 383         }
 384         return(0);
 385 }
 386
 387 sting(monster)
 388 object *monster;
 389 {
 390         short sting_chance = 35;
 391         char msg[80];
 392
 393         if ((rogue.str_current <= 3) || sustain_strength) {
 394                 return;
 395         }
 396         sting_chance += (6 * (6 - get_armor_class(rogue.armor)));
 397
 398         if ((rogue.exp + ring_exp) > 8) {
 399                 sting_chance -= (6 * ((rogue.exp + ring_exp) - 8));
 400         }
 401         if (rand_percent(sting_chance)) {
 402                 sprintf(msg, "the %s's bite has weakened you",
 403                 mon_name(monster));
 404                 message(msg, 0);
 405                 rogue.str_current--;
 406                 print_stats(STAT_STRENGTH);
 407         }
 408 }
 409
 410 drop_level()
 411 {
 412         int hp;
 413
 414         if (rand_percent(80) || (rogue.exp <= 5)) {
 415                 return;
 416         }
 417         rogue.exp_points = level_points[rogue.exp-2] - get_rand(9, 29);
 418         rogue.exp -= 2;
 419         hp = hp_raise();
 420         if ((rogue.hp_current -= hp) <= 0) {
 421                 rogue.hp_current = 1;
 422         }
 423         if ((rogue.hp_max -= hp) <= 0) {
 424                 rogue.hp_max = 1;
 425         }
 426         add_exp(1, 0);
 427 }
 428
 429 drain_life()
 430 {
 431         short n;
 432
 433         if (rand_percent(60) || (rogue.hp_max <= 30) || (rogue.hp_current < 10)) {
 434                 return;
 435         }
 436         n = get_rand(1, 3);             /* 1 Hp, 2 Str, 3 both */
 437
 438         if ((n != 2) || (!sustain_strength)) {
 439                 message("you feel weaker", 0);
 440         }
 441         if (n != 2) {
 442                 rogue.hp_max--;
 443                 rogue.hp_current--;
 444                 less_hp++;
 445         }
 446         if (n != 1) {
 447                 if ((rogue.str_current > 3) && (!sustain_strength)) {
 448                         rogue.str_current--;
 449                         if (coin_toss()) {
 450                                 rogue.str_max--;
 451                         }
 452                 }
 453         }
 454         print_stats((STAT_STRENGTH | STAT_HP));
 455 }
 456
 457 m_confuse(monster)
 458 object *monster;
 459 {
 460         char msg[80];
 461
 462         if (!rogue_can_see(monster->row, monster->col)) {
 463                 return(0);
 464         }
 465         if (rand_percent(45)) {
 466                 monster->m_flags &= (~CONFUSES);        /* will not confuse the rogue */
 467                 return(0);
 468         }
 469         if (rand_percent(55)) {
 470                 monster->m_flags &= (~CONFUSES);
 471                 sprintf(msg, "the gaze of the %s has confused you", mon_name(monster));
 472                 message(msg, 1);
 473                 cnfs();
 474                 return(1);
 475         }
 476         return(0);
 477 }
 478
 479 flame_broil(monster)
 480 object *monster;
 481 {
 482         short row, col, dir;
 483
 484         if ((!mon_sees(monster, rogue.row, rogue.col)) || coin_toss()) {
 485                 return(0);
 486         }
 487         row = rogue.row - monster->row;
 488         col = rogue.col - monster->col;
 489         if (row < 0) {
 490                 row = -row;
 491         }
 492         if (col < 0) {
 493                 col = -col;
 494         }
 495         if (((row != 0) && (col != 0) && (row != col)) ||
 496                 ((row > 7) || (col > 7))) {
 497                 return(0);
 498         }
 499         dir = get_dir(monster->row, monster->col, row, col);
 500         bounce(FIRE, dir, monster->row, monster->col, 0);
 501
 502         return(1);
 503 }
 504
 505 get_dir(srow, scol, drow, dcol)
 506 short srow, scol, drow, dcol;
 507 {
 508         if (srow == drow) {
 509                 if (scol < dcol) {
 510                         return(RIGHT);
 511                 } else {
 512                         return(LEFT);
 513                 }
 514         }
 515         if (scol == dcol) {
 516                 if (srow < drow) {
 517                         return(DOWN);
 518                 } else {
 519                         return(UPWARD);
 520                 }
 521         }
 522         if ((srow > drow) && (scol > dcol)) {
 523                 return(UPLEFT);
 524         }
 525         if ((srow < drow) && (scol < dcol)) {
 526                 return(DOWNRIGHT);
 527         }
 528         if ((srow < drow) && (scol > dcol)) {
 529                 return(DOWNLEFT);
 530         }
 531         /*if ((srow > drow) && (scol < dcol)) {*/
 532                 return(UPRIGHT);
 533         /*}*/
 534 }