games/rogue/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  * @(#)hit.c    8.1 (Berkeley) 5/31/93
  37  * $FreeBSD: src/games/rogue/hit.c,v 1.6 1999/11/30 03:49:22 billf Exp $
  38  * $DragonFly: src/games/rogue/hit.c,v 1.3 2006/09/02 19:31:07 pavalos Exp $
  39  */
  40
  41 /*
  42  * 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 object *fight_monster = 0;
  56 char hit_message[80] = "";
  57
  58 extern short halluc, blind, cur_level;
  59 extern short add_strength, ring_exp, r_rings;
  60 extern boolean being_held, interrupted, wizard, con_mon;
  61
  62 static int      get_w_damage(const object *);
  63 static int      to_hit(const object *);
  64 static short    damage_for_strength(void);
  65
  66 void
  67 mon_hit(object *monster)
  68 {
  69         short damage, hit_chance;
  70         const char *mn;
  71         float minus;
  72
  73         if (fight_monster && (monster != fight_monster)) {
  74                 fight_monster = 0;
  75         }
  76         monster->trow = NO_ROOM;
  77         if (cur_level >= (AMULET_LEVEL * 2)) {
  78                 hit_chance = 100;
  79         } else {
  80                 hit_chance = monster->m_hit_chance;
  81                 hit_chance -= (((2 * rogue.exp) + (2 * ring_exp)) - r_rings);
  82         }
  83         if (wizard) {
  84                 hit_chance /= 2;
  85         }
  86         if (!fight_monster) {
  87                 interrupted = 1;
  88         }
  89         mn = mon_name(monster);
  90
  91         if (!rand_percent(hit_chance)) {
  92                 if (!fight_monster) {
  93                         sprintf(hit_message + strlen(hit_message), "the %s misses", mn);
  94                         message(hit_message, 1);
  95                         hit_message[0] = 0;
  96                 }
  97                 return;
  98         }
  99         if (!fight_monster) {
 100                 sprintf(hit_message + strlen(hit_message), "the %s hit", mn);
 101                 message(hit_message, 1);
 102                 hit_message[0] = 0;
 103         }
 104         if (!(monster->m_flags & STATIONARY)) {
 105                 damage = get_damage(monster->m_damage, 1);
 106                 if (cur_level >= (AMULET_LEVEL * 2)) {
 107                         minus = (float) ((AMULET_LEVEL * 2) - cur_level);
 108                 } else {
 109                         minus = (float) get_armor_class(rogue.armor) * 3.00;
 110                         minus = minus/100.00 * (float) damage;
 111                 }
 112                 damage -= (short) minus;
 113         } else {
 114                 damage = monster->stationary_damage++;
 115         }
 116         if (wizard) {
 117                 damage /= 3;
 118         }
 119         if (damage > 0) {
 120                 rogue_damage(damage, monster, 0);
 121         }
 122         if (monster->m_flags & SPECIAL_HIT) {
 123                 special_hit(monster);
 124         }
 125 }
 126
 127 void
 128 rogue_hit(object *monster, boolean force_hit)
 129 {
 130         short damage, hit_chance;
 131
 132         if (monster) {
 133                 if (check_imitator(monster)) {
 134                         return;
 135                 }
 136                 hit_chance = force_hit ? 100 : get_hit_chance(rogue.weapon);
 137
 138                 if (wizard) {
 139                         hit_chance *= 2;
 140                 }
 141                 if (!rand_percent(hit_chance)) {
 142                         if (!fight_monster) {
 143                                 strcpy(hit_message, "you miss  ");
 144                         }
 145                         goto RET;
 146                 }
 147                 damage = get_weapon_damage(rogue.weapon);
 148                 if (wizard) {
 149                         damage *= 3;
 150                 }
 151                 if (con_mon) {
 152                         s_con_mon(monster);
 153                 }
 154                 if (mon_damage(monster, damage)) {      /* still alive? */
 155                         if (!fight_monster) {
 156                                 strcpy(hit_message, "you hit  ");
 157                         }
 158                 }
 159 RET:    check_gold_seeker(monster);
 160                 wake_up(monster);
 161         }
 162 }
 163
 164 void
 165 rogue_damage(short d, object *monster, short other)
 166 {
 167         if (d >= rogue.hp_current) {
 168                 rogue.hp_current = 0;
 169                 print_stats(STAT_HP);
 170                 killed_by(monster, other);
 171         }
 172         if (d > 0) {
 173                 rogue.hp_current -= d;
 174                 print_stats(STAT_HP);
 175         }
 176 }
 177
 178 int
 179 get_damage(const char *ds, boolean r)
 180 {
 181         int i = 0, j, n, d, total = 0;
 182
 183         while (ds[i]) {
 184                 n = get_number(ds+i);
 185                 while (ds[i++] != 'd') ;
 186                 d = get_number(ds+i);
 187                 while ((ds[i] != '/') && ds[i]) i++;
 188
 189                 for (j = 0; j < n; j++) {
 190                         if (r) {
 191                                 total += get_rand(1, d);
 192                         } else {
 193                                 total += d;
 194                         }
 195                 }
 196                 if (ds[i] == '/') {
 197                         i++;
 198                 }
 199         }
 200         return(total);
 201 }
 202
 203 static int
 204 get_w_damage(const object *obj)
 205 {
 206         char new_damage[12];
 207         int t_hit, damage;
 208         int i = 0;
 209
 210         if ((!obj) || (obj->what_is != WEAPON)) {
 211                 return(-1);
 212         }
 213         t_hit = get_number(obj->damage) + obj->hit_enchant;
 214         while (obj->damage[i++] != 'd') ;
 215         damage = get_number(obj->damage + i) + obj->d_enchant;
 216
 217         sprintf(new_damage, "%dd%d", t_hit, damage);
 218
 219         return(get_damage(new_damage, 1));
 220 }
 221
 222 int
 223 get_number(const char *s)
 224 {
 225         int i = 0;
 226         int total = 0;
 227
 228         while ((s[i] >= '0') && (s[i] <= '9')) {
 229                 total = (10 * total) + (s[i] - '0');
 230                 i++;
 231         }
 232         return(total);
 233 }
 234
 235 long
 236 lget_number(const char *s)
 237 {
 238         short i = 0;
 239         long total = 0;
 240
 241         while ((s[i] >= '0') && (s[i] <= '9')) {
 242                 total = (10 * total) + (s[i] - '0');
 243                 i++;
 244         }
 245         return(total);
 246 }
 247
 248 static int
 249 to_hit(const object *obj)
 250 {
 251         if (!obj) {
 252                 return(1);
 253         }
 254         return(get_number(obj->damage) + obj->hit_enchant);
 255 }
 256
 257 static short
 258 damage_for_strength(void)
 259 {
 260         short strength;
 261
 262         strength = rogue.str_current + add_strength;
 263
 264         if (strength <= 6) {
 265                 return(strength-5);
 266         }
 267         if (strength <= 14) {
 268                 return(1);
 269         }
 270         if (strength <= 17) {
 271                 return(3);
 272         }
 273         if (strength <= 18) {
 274                 return(4);
 275         }
 276         if (strength <= 20) {
 277                 return(5);
 278         }
 279         if (strength <= 21) {
 280                 return(6);
 281         }
 282         if (strength <= 30) {
 283                 return(7);
 284         }
 285         return(8);
 286 }
 287
 288 boolean
 289 mon_damage(object *monster, short damage)
 290 {
 291         const char *mn;
 292         short row, col;
 293
 294         monster->hp_to_kill -= damage;
 295
 296         if (monster->hp_to_kill <= 0) {
 297                 row = monster->row;
 298                 col = monster->col;
 299                 dungeon[row][col] &= ~MONSTER;
 300                 mvaddch(row, col, (int) get_dungeon_char(row, col));
 301
 302                 fight_monster = 0;
 303                 cough_up(monster);
 304                 mn = mon_name(monster);
 305                 sprintf(hit_message+strlen(hit_message), "defeated the %s", mn);
 306                 message(hit_message, 1);
 307                 hit_message[0] = 0;
 308                 add_exp(monster->kill_exp, 1);
 309                 take_from_pack(monster, &level_monsters);
 310
 311                 if (monster->m_flags & HOLDS) {
 312                         being_held = 0;
 313                 }
 314                 free_object(monster);
 315                 return(0);
 316         }
 317         return(1);
 318 }
 319
 320 void
 321 fight(boolean to_the_death)
 322 {
 323         short ch, c, d;
 324         short row, col;
 325         boolean first_miss = 1;
 326         short possible_damage;
 327         object *monster;
 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                 return;
 339         }
 340         row = rogue.row; col = rogue.col;
 341         get_dir_rc(d, &row, &col, 0);
 342
 343         c = mvinch(row, col);
 344         if (((c < 'A') || (c > 'Z')) ||
 345                 (!can_move(rogue.row, rogue.col, row, col))) {
 346                 message("I see no monster there", 0);
 347                 return;
 348         }
 349         if (!(fight_monster = object_at(&level_monsters, row, col))) {
 350                 return;
 351         }
 352         if (!(fight_monster->m_flags & STATIONARY)) {
 353                 possible_damage = ((get_damage(fight_monster->m_damage, 0) * 2) / 3);
 354         } else {
 355                 possible_damage = fight_monster->stationary_damage - 1;
 356         }
 357         while (fight_monster) {
 358                 one_move_rogue(ch, 0);
 359                 if (((!to_the_death) && (rogue.hp_current <= possible_damage)) ||
 360                         interrupted || (!(dungeon[row][col] & MONSTER))) {
 361                         fight_monster = 0;
 362                 } else {
 363                         monster = object_at(&level_monsters, row, col);
 364                         if (monster != fight_monster) {
 365                                 fight_monster = 0;
 366                         }
 367                 }
 368         }
 369 }
 370
 371 void
 372 get_dir_rc(short dir, short *row, short *col, short allow_off_screen)
 373 {
 374         switch(dir) {
 375         case LEFT:
 376                 if (allow_off_screen || (*col > 0)) {
 377                         (*col)--;
 378                 }
 379                 break;
 380         case DOWN:
 381                 if (allow_off_screen || (*row < (DROWS-2))) {
 382                         (*row)++;
 383                 }
 384                 break;
 385         case UPWARD:
 386                 if (allow_off_screen || (*row > MIN_ROW)) {
 387                         (*row)--;
 388                 }
 389                 break;
 390         case RIGHT:
 391                 if (allow_off_screen || (*col < (DCOLS-1))) {
 392                         (*col)++;
 393                 }
 394                 break;
 395         case UPLEFT:
 396                 if (allow_off_screen || ((*row > MIN_ROW) && (*col > 0))) {
 397                         (*row)--;
 398                         (*col)--;
 399                 }
 400                 break;
 401         case UPRIGHT:
 402                 if (allow_off_screen || ((*row > MIN_ROW) && (*col < (DCOLS-1)))) {
 403                         (*row)--;
 404                         (*col)++;
 405                 }
 406                 break;
 407         case DOWNRIGHT:
 408                 if (allow_off_screen || ((*row < (DROWS-2)) && (*col < (DCOLS-1)))) {
 409                         (*row)++;
 410                         (*col)++;
 411                 }
 412                 break;
 413         case DOWNLEFT:
 414                 if (allow_off_screen || ((*row < (DROWS-2)) && (*col > 0))) {
 415                         (*row)++;
 416                         (*col)--;
 417                 }
 418                 break;
 419         }
 420 }
 421
 422 short
 423 get_hit_chance(const object *weapon)
 424 {
 425         short hit_chance;
 426
 427         hit_chance = 40;
 428         hit_chance += 3 * to_hit(weapon);
 429         hit_chance += (((2 * rogue.exp) + (2 * ring_exp)) - r_rings);
 430         return(hit_chance);
 431 }
 432
 433 short
 434 get_weapon_damage(const object *weapon)
 435 {
 436         short damage;
 437
 438         damage = get_w_damage(weapon);
 439         damage += damage_for_strength();
 440         damage += ((((rogue.exp + ring_exp) - r_rings) + 1) / 2);
 441         return(damage);
 442 }
 443
 444 void
 445 s_con_mon(object *monster)
 446 {
 447         if (con_mon) {
 448                 monster->m_flags |= CONFUSED;
 449                 monster->moves_confused += get_rand(12, 22);
 450                 message("the monster appears confused", 0);
 451                 con_mon = 0;
 452         }
 453 }