src/warning.c

   1
   2 #include "angband.h"
   3 #include "util.h"
   4
   5 #include "artifact.h"
   6 #include "player-move.h"
   7 #include "feature.h"
   8 #include "floor.h"
   9 #include "warning.h"
  10 #include "player-status.h"
  11 #include "monster.h"
  12 #include "monster-spell.h"
  13 #include "spells.h"
  14 #include "object-flavor.h"
  15 #include "dungeon.h"
  16 #include "player-race.h"
  17 #include "player-class.h"
  18 #include "melee.h"
  19 #include "realm-song.h"
  20
  21 /*!
  22  * @brief 警告を放つアイテムを選択する /
  23  * Choose one of items that have warning flag
  24  * Calculate spell damages
  25  * @return 警告を行う
  26  */
  27 object_type *choose_warning_item(player_type *creature_ptr)
  28 {
  29         int choices[INVEN_TOTAL - INVEN_RARM];
  30
  31         /* Paranoia -- Player has no warning ability */
  32         if (!creature_ptr->warning) return NULL;
  33
  34         /* Search Inventory */
  35         int number = 0;
  36         for (int i = INVEN_RARM; i < INVEN_TOTAL; i++)
  37         {
  38                 BIT_FLAGS flgs[TR_FLAG_SIZE];
  39                 object_type *o_ptr = &creature_ptr->inventory_list[i];
  40
  41                 object_flags(o_ptr, flgs);
  42                 if (have_flag(flgs, TR_WARNING))
  43                 {
  44                         choices[number] = i;
  45                         number++;
  46                 }
  47         }
  48
  49         /* Choice one of them */
  50         return number ? &creature_ptr->inventory_list[choices[randint0(number)]] : NULL;
  51 }
  52
  53 /*!
  54  * @brief 警告基準を定めるために魔法の効果属性に基づいて最大魔法ダメージを計算する /
  55  * Calculate spell damages
  56  * @param m_ptr 魔法を行使するモンスターの構造体参照ポインタ
  57  * @param typ 効果属性のID
  58  * @param dam 基本ダメージ
  59  * @param max 算出した最大ダメージを返すポインタ
  60  * @return なし
  61  */
  62 static void spell_damcalc(player_type *target_ptr, monster_type *m_ptr, EFFECT_ID typ, HIT_POINT dam, int *max)
  63 {
  64         monster_race *r_ptr = &r_info[m_ptr->r_idx];
  65         int rlev = r_ptr->level;
  66         bool ignore_wraith_form = FALSE;
  67
  68         /* Vulnerability, resistance and immunity */
  69         switch (typ)
  70         {
  71         case GF_ELEC:
  72                 if (target_ptr->immune_elec)
  73                 {
  74                         dam = 0;
  75                         ignore_wraith_form = TRUE;
  76                         break;
  77                 }
  78
  79                 if (target_ptr->muta3 & MUT3_VULN_ELEM) dam *= 2;
  80                 if (target_ptr->special_defense & KATA_KOUKIJIN) dam += dam / 3;
  81                 if (PRACE_IS_(target_ptr, RACE_ANDROID)) dam += dam / 3;
  82                 if (target_ptr->resist_elec) dam = (dam + 2) / 3;
  83                 if (is_oppose_elec(target_ptr)) dam = (dam + 2) / 3;
  84                 break;
  85
  86         case GF_POIS:
  87                 if (target_ptr->resist_pois) dam = (dam + 2) / 3;
  88                 if (is_oppose_pois(target_ptr)) dam = (dam + 2) / 3;
  89                 break;
  90
  91         case GF_ACID:
  92                 if (target_ptr->immune_acid)
  93                 {
  94                         dam = 0;
  95                         ignore_wraith_form = TRUE;
  96                         break;
  97                 }
  98
  99                 if (target_ptr->muta3 & MUT3_VULN_ELEM) dam *= 2;
 100                 if (target_ptr->special_defense & KATA_KOUKIJIN) dam += dam / 3;
 101                 if (target_ptr->resist_acid) dam = (dam + 2) / 3;
 102                 if (is_oppose_acid(target_ptr)) dam = (dam + 2) / 3;
 103                 break;
 104
 105         case GF_COLD:
 106         case GF_ICE:
 107                 if (target_ptr->immune_cold)
 108                 {
 109                         dam = 0;
 110                         ignore_wraith_form = TRUE;
 111                         break;
 112                 }
 113
 114                 if (target_ptr->muta3 & MUT3_VULN_ELEM) dam *= 2;
 115                 if (target_ptr->special_defense & KATA_KOUKIJIN) dam += dam / 3;
 116                 if (target_ptr->resist_cold) dam = (dam + 2) / 3;
 117                 if (is_oppose_cold(target_ptr)) dam = (dam + 2) / 3;
 118                 break;
 119
 120         case GF_FIRE:
 121                 if (target_ptr->immune_fire)
 122                 {
 123                         dam = 0;
 124                         ignore_wraith_form = TRUE;
 125                         break;
 126                 }
 127
 128                 if (target_ptr->muta3 & MUT3_VULN_ELEM) dam *= 2;
 129                 if (PRACE_IS_(target_ptr, RACE_ENT)) dam += dam / 3;
 130                 if (target_ptr->special_defense & KATA_KOUKIJIN) dam += dam / 3;
 131                 if (target_ptr->resist_fire) dam = (dam + 2) / 3;
 132                 if (is_oppose_fire(target_ptr)) dam = (dam + 2) / 3;
 133                 break;
 134
 135         case GF_PSY_SPEAR:
 136                 ignore_wraith_form = TRUE;
 137                 break;
 138
 139         case GF_ARROW:
 140                 if (!target_ptr->blind &&
 141                         ((target_ptr->inventory_list[INVEN_RARM].k_idx && (target_ptr->inventory_list[INVEN_RARM].name1 == ART_ZANTETSU)) ||
 142                         (target_ptr->inventory_list[INVEN_LARM].k_idx && (target_ptr->inventory_list[INVEN_LARM].name1 == ART_ZANTETSU))))
 143                 {
 144                         dam = 0;
 145                         ignore_wraith_form = TRUE;
 146                 }
 147
 148                 break;
 149
 150         case GF_LITE:
 151                 if (target_ptr->resist_lite) dam /= 2; /* Worst case of 4 / (d4 + 7) */
 152                 if (PRACE_IS_(target_ptr, RACE_VAMPIRE) || (target_ptr->mimic_form == MIMIC_VAMPIRE)) dam *= 2;
 153                 else if (PRACE_IS_(target_ptr, RACE_S_FAIRY)) dam = dam * 4 / 3;
 154
 155                 if (target_ptr->wraith_form) dam *= 2;
 156                 break;
 157
 158         case GF_DARK:
 159                 if (PRACE_IS_(target_ptr, RACE_VAMPIRE) || (target_ptr->mimic_form == MIMIC_VAMPIRE) || target_ptr->wraith_form)
 160                 {
 161                         dam = 0;
 162                         ignore_wraith_form = TRUE;
 163                 }
 164                 else if (target_ptr->resist_dark) dam /= 2; /* Worst case of 4 / (d4 + 7) */
 165                 break;
 166
 167         case GF_SHARDS:
 168                 if (target_ptr->resist_shard) dam = dam * 3 / 4; /* Worst case of 6 / (d4 + 7) */
 169                 break;
 170
 171         case GF_SOUND:
 172                 if (target_ptr->resist_sound) dam = dam * 5 / 8; /* Worst case of 5 / (d4 + 7) */
 173                 break;
 174
 175         case GF_CONFUSION:
 176                 if (target_ptr->resist_conf) dam = dam * 5 / 8; /* Worst case of 5 / (d4 + 7) */
 177                 break;
 178
 179         case GF_CHAOS:
 180                 if (target_ptr->resist_chaos) dam = dam * 3 / 4; /* Worst case of 6 / (d4 + 7) */
 181                 break;
 182
 183         case GF_NETHER:
 184                 if (PRACE_IS_(target_ptr, RACE_SPECTRE))
 185                 {
 186                         dam = 0;
 187                         ignore_wraith_form = TRUE;
 188                 }
 189                 else if (target_ptr->resist_neth) dam = dam * 3 / 4; /* Worst case of 6 / (d4 + 7) */
 190                 break;
 191
 192         case GF_DISENCHANT:
 193                 if (target_ptr->resist_disen) dam = dam * 3 / 4; /* Worst case of 6 / (d4 + 7) */
 194                 break;
 195
 196         case GF_NEXUS:
 197                 if (target_ptr->resist_nexus) dam = dam * 3 / 4; /* Worst case of 6 / (d4 + 7) */
 198                 break;
 199
 200         case GF_TIME:
 201                 if (target_ptr->resist_time) dam /= 2; /* Worst case of 4 / (d4 + 7) */
 202                 break;
 203
 204         case GF_GRAVITY:
 205                 if (target_ptr->levitation) dam = (dam * 2) / 3;
 206                 break;
 207
 208         case GF_ROCKET:
 209                 if (target_ptr->resist_shard) dam /= 2;
 210                 break;
 211
 212         case GF_NUKE:
 213                 if (target_ptr->resist_pois) dam = (2 * dam + 2) / 5;
 214                 if (is_oppose_pois(target_ptr)) dam = (2 * dam + 2) / 5;
 215                 break;
 216
 217         case GF_DEATH_RAY:
 218                 if (target_ptr->mimic_form)
 219                 {
 220                         if (mimic_info[target_ptr->mimic_form].MIMIC_FLAGS & MIMIC_IS_NONLIVING)
 221                         {
 222                                 dam = 0;
 223                                 ignore_wraith_form = TRUE;
 224                         }
 225
 226                         break;
 227                 }
 228
 229                 switch (target_ptr->prace)
 230                 {
 231                 case RACE_GOLEM:
 232                 case RACE_SKELETON:
 233                 case RACE_ZOMBIE:
 234                 case RACE_VAMPIRE:
 235                 case RACE_DEMON:
 236                 case RACE_SPECTRE:
 237                         dam = 0;
 238                         ignore_wraith_form = TRUE;
 239                         break;
 240                 }
 241
 242                 break;
 243
 244         case GF_HOLY_FIRE:
 245                 if (target_ptr->align > 10) dam /= 2;
 246                 else if (target_ptr->align < -10) dam *= 2;
 247                 break;
 248
 249         case GF_HELL_FIRE:
 250                 if (target_ptr->align > 10) dam *= 2;
 251                 break;
 252
 253         case GF_MIND_BLAST:
 254         case GF_BRAIN_SMASH:
 255                 if (100 + rlev / 2 <= MAX(5, target_ptr->skill_sav))
 256                 {
 257                         dam = 0;
 258                         ignore_wraith_form = TRUE;
 259                 }
 260
 261                 break;
 262
 263         case GF_CAUSE_1:
 264         case GF_CAUSE_2:
 265         case GF_CAUSE_3:
 266         case GF_HAND_DOOM:
 267                 if (100 + rlev / 2 <= target_ptr->skill_sav)
 268                 {
 269                         dam = 0;
 270                         ignore_wraith_form = TRUE;
 271                 }
 272
 273                 break;
 274
 275         case GF_CAUSE_4:
 276                 if ((100 + rlev / 2 <= target_ptr->skill_sav) && (m_ptr->r_idx != MON_KENSHIROU))
 277                 {
 278                         dam = 0;
 279                         ignore_wraith_form = TRUE;
 280                 }
 281
 282                 break;
 283         }
 284
 285         if (target_ptr->wraith_form && !ignore_wraith_form)
 286         {
 287                 dam /= 2;
 288                 if (!dam) dam = 1;
 289         }
 290
 291         if (dam > *max) *max = dam;
 292 }
 293
 294 /*!
 295 * @brief 警告基準を定めるために魔法の効果属性に基づいて最大魔法ダメージを計算する。 /
 296 * Calculate spell damages
 297 * @param spell_num RF4ならRF4_SPELL_STARTのように32区切りのベースとなる数値
 298 * @param typ 効果属性のID
 299 * @param m_idx 魔法を行使するモンスターのID
 300 * @param max 算出した最大ダメージを返すポインタ
 301 * @return なし
 302 */
 303 void spell_damcalc_by_spellnum(player_type *creature_ptr, int spell_num, EFFECT_ID typ, MONSTER_IDX m_idx, int *max)
 304 {
 305         monster_type *m_ptr = &creature_ptr->current_floor_ptr->m_list[m_idx];
 306         HIT_POINT dam = monspell_damage(creature_ptr, spell_num, m_idx, DAM_MAX);
 307         spell_damcalc(creature_ptr, m_ptr, typ, dam, max);
 308 }
 309
 310 /*!
 311  * @brief 警告基準を定めるためにモンスターの打撃最大ダメージを算出する /
 312  * Calculate blow damages
 313  * @param m_ptr 打撃を行使するモンスターの構造体参照ポインタ
 314  * @param blow_ptr モンスターの打撃能力の構造体参照ポインタ
 315  * @return 算出された最大ダメージを返す。
 316  */
 317 static int blow_damcalc(monster_type *m_ptr, player_type *target_ptr, monster_blow *blow_ptr)
 318 {
 319         int dam = blow_ptr->d_dice * blow_ptr->d_side;
 320         int dummy_max = 0;
 321
 322         if (blow_ptr->method == RBM_EXPLODE)
 323         {
 324                 dam = (dam + 1) / 2;
 325                 spell_damcalc(target_ptr, m_ptr, mbe_info[blow_ptr->effect].explode_type, dam, &dummy_max);
 326                 dam = dummy_max;
 327                 return dam;
 328         }
 329
 330         ARMOUR_CLASS ac = target_ptr->ac + target_ptr->to_a;
 331         bool check_wraith_form = TRUE;
 332         switch (blow_ptr->effect)
 333         {
 334         case RBE_SUPERHURT:
 335         {
 336                 int tmp_dam = dam - (dam * ((ac < 150) ? ac : 150) / 250);
 337                 dam = MAX(dam, tmp_dam * 2);
 338                 break;
 339         }
 340
 341         case RBE_HURT:
 342         case RBE_SHATTER:
 343                 dam -= (dam * ((ac < 150) ? ac : 150) / 250);
 344                 break;
 345
 346         case RBE_ACID:
 347                 spell_damcalc(target_ptr, m_ptr, GF_ACID, dam, &dummy_max);
 348                 dam = dummy_max;
 349                 check_wraith_form = FALSE;
 350                 break;
 351
 352         case RBE_ELEC:
 353                 spell_damcalc(target_ptr, m_ptr, GF_ELEC, dam, &dummy_max);
 354                 dam = dummy_max;
 355                 check_wraith_form = FALSE;
 356                 break;
 357
 358         case RBE_FIRE:
 359                 spell_damcalc(target_ptr, m_ptr, GF_FIRE, dam, &dummy_max);
 360                 dam = dummy_max;
 361                 check_wraith_form = FALSE;
 362                 break;
 363
 364         case RBE_COLD:
 365                 spell_damcalc(target_ptr, m_ptr, GF_COLD, dam, &dummy_max);
 366                 dam = dummy_max;
 367                 check_wraith_form = FALSE;
 368                 break;
 369
 370         case RBE_DR_MANA:
 371                 dam = 0;
 372                 check_wraith_form = FALSE;
 373                 break;
 374         }
 375
 376         if (check_wraith_form && target_ptr->wraith_form)
 377         {
 378                 dam /= 2;
 379                 if (!dam) dam = 1;
 380         }
 381
 382         return dam;
 383 }
 384
 385
 386 /*!
 387  * @brief プレイヤーが特定地点へ移動した場合に警告を発する処理 /
 388  * Examine the grid (xx,yy) and warn the player if there are any danger
 389  * @param xx 危険性を調査するマスのX座標
 390  * @param yy 危険性を調査するマスのY座標
 391  * @return 警告を無視して進むことを選択するかか問題が無ければTRUE、警告に従ったならFALSEを返す。
 392  */
 393 bool process_warning(player_type *creature_ptr, POSITION xx, POSITION yy)
 394 {
 395         POSITION mx, my;
 396         grid_type *g_ptr;
 397         GAME_TEXT o_name[MAX_NLEN];
 398
 399 #define WARNING_AWARE_RANGE 12
 400         int dam_max = 0;
 401         static int old_damage = 0;
 402
 403         for (mx = xx - WARNING_AWARE_RANGE; mx < xx + WARNING_AWARE_RANGE + 1; mx++)
 404         {
 405                 for (my = yy - WARNING_AWARE_RANGE; my < yy + WARNING_AWARE_RANGE + 1; my++)
 406                 {
 407                         int dam_max0 = 0;
 408                         monster_type *m_ptr;
 409                         monster_race *r_ptr;
 410
 411                         if (!in_bounds(creature_ptr->current_floor_ptr, my, mx) || (distance(my, mx, yy, xx) > WARNING_AWARE_RANGE)) continue;
 412
 413                         g_ptr = &creature_ptr->current_floor_ptr->grid_array[my][mx];
 414
 415                         if (!g_ptr->m_idx) continue;
 416
 417                         m_ptr = &creature_ptr->current_floor_ptr->m_list[g_ptr->m_idx];
 418
 419                         if (MON_CSLEEP(m_ptr)) continue;
 420                         if (!is_hostile(m_ptr)) continue;
 421
 422                         r_ptr = &r_info[m_ptr->r_idx];
 423
 424                         /* Monster spells (only powerful ones)*/
 425                         if (projectable(creature_ptr, my, mx, yy, xx))
 426                         {
 427                                 BIT_FLAGS f4 = r_ptr->flags4;
 428                                 BIT_FLAGS f5 = r_ptr->a_ability_flags1;
 429                                 BIT_FLAGS f6 = r_ptr->a_ability_flags2;
 430
 431                                 if (!(d_info[creature_ptr->dungeon_idx].flags1 & DF1_NO_MAGIC))
 432                                 {
 433                                         if (f4 & RF4_BA_CHAO) spell_damcalc_by_spellnum(creature_ptr, MS_BALL_CHAOS, GF_CHAOS, g_ptr->m_idx, &dam_max0);
 434                                         if (f5 & RF5_BA_MANA) spell_damcalc_by_spellnum(creature_ptr, MS_BALL_MANA, GF_MANA, g_ptr->m_idx, &dam_max0);
 435                                         if (f5 & RF5_BA_DARK) spell_damcalc_by_spellnum(creature_ptr, MS_BALL_DARK, GF_DARK, g_ptr->m_idx, &dam_max0);
 436                                         if (f5 & RF5_BA_LITE) spell_damcalc_by_spellnum(creature_ptr, MS_STARBURST, GF_LITE, g_ptr->m_idx, &dam_max0);
 437                                         if (f6 & RF6_HAND_DOOM) spell_damcalc_by_spellnum(creature_ptr, MS_HAND_DOOM, GF_HAND_DOOM, g_ptr->m_idx, &dam_max0);
 438                                         if (f6 & RF6_PSY_SPEAR) spell_damcalc_by_spellnum(creature_ptr, MS_PSY_SPEAR, GF_PSY_SPEAR, g_ptr->m_idx, &dam_max0);
 439                                 }
 440
 441                                 if (f4 & RF4_ROCKET) spell_damcalc_by_spellnum(creature_ptr, MS_ROCKET, GF_ROCKET, g_ptr->m_idx, &dam_max0);
 442                                 if (f4 & RF4_BR_ACID) spell_damcalc_by_spellnum(creature_ptr, MS_BR_ACID, GF_ACID, g_ptr->m_idx, &dam_max0);
 443                                 if (f4 & RF4_BR_ELEC) spell_damcalc_by_spellnum(creature_ptr, MS_BR_ELEC, GF_ELEC, g_ptr->m_idx, &dam_max0);
 444                                 if (f4 & RF4_BR_FIRE) spell_damcalc_by_spellnum(creature_ptr, MS_BR_FIRE, GF_FIRE, g_ptr->m_idx, &dam_max0);
 445                                 if (f4 & RF4_BR_COLD) spell_damcalc_by_spellnum(creature_ptr, MS_BR_COLD, GF_COLD, g_ptr->m_idx, &dam_max0);
 446                                 if (f4 & RF4_BR_POIS) spell_damcalc_by_spellnum(creature_ptr, MS_BR_POIS, GF_POIS, g_ptr->m_idx, &dam_max0);
 447                                 if (f4 & RF4_BR_NETH) spell_damcalc_by_spellnum(creature_ptr, MS_BR_NETHER, GF_NETHER, g_ptr->m_idx, &dam_max0);
 448                                 if (f4 & RF4_BR_LITE) spell_damcalc_by_spellnum(creature_ptr, MS_BR_LITE, GF_LITE, g_ptr->m_idx, &dam_max0);
 449                                 if (f4 & RF4_BR_DARK) spell_damcalc_by_spellnum(creature_ptr, MS_BR_DARK, GF_DARK, g_ptr->m_idx, &dam_max0);
 450                                 if (f4 & RF4_BR_CONF) spell_damcalc_by_spellnum(creature_ptr, MS_BR_CONF, GF_CONFUSION, g_ptr->m_idx, &dam_max0);
 451                                 if (f4 & RF4_BR_SOUN) spell_damcalc_by_spellnum(creature_ptr, MS_BR_SOUND, GF_SOUND, g_ptr->m_idx, &dam_max0);
 452                                 if (f4 & RF4_BR_CHAO) spell_damcalc_by_spellnum(creature_ptr, MS_BR_CHAOS, GF_CHAOS, g_ptr->m_idx, &dam_max0);
 453                                 if (f4 & RF4_BR_DISE) spell_damcalc_by_spellnum(creature_ptr, MS_BR_DISEN, GF_DISENCHANT, g_ptr->m_idx, &dam_max0);
 454                                 if (f4 & RF4_BR_NEXU) spell_damcalc_by_spellnum(creature_ptr, MS_BR_NEXUS, GF_NEXUS, g_ptr->m_idx, &dam_max0);
 455                                 if (f4 & RF4_BR_TIME) spell_damcalc_by_spellnum(creature_ptr, MS_BR_TIME, GF_TIME, g_ptr->m_idx, &dam_max0);
 456                                 if (f4 & RF4_BR_INER) spell_damcalc_by_spellnum(creature_ptr, MS_BR_INERTIA, GF_INERTIAL, g_ptr->m_idx, &dam_max0);
 457                                 if (f4 & RF4_BR_GRAV) spell_damcalc_by_spellnum(creature_ptr, MS_BR_GRAVITY, GF_GRAVITY, g_ptr->m_idx, &dam_max0);
 458                                 if (f4 & RF4_BR_SHAR) spell_damcalc_by_spellnum(creature_ptr, MS_BR_SHARDS, GF_SHARDS, g_ptr->m_idx, &dam_max0);
 459                                 if (f4 & RF4_BR_PLAS) spell_damcalc_by_spellnum(creature_ptr, MS_BR_PLASMA, GF_PLASMA, g_ptr->m_idx, &dam_max0);
 460                                 if (f4 & RF4_BR_WALL) spell_damcalc_by_spellnum(creature_ptr, MS_BR_FORCE, GF_FORCE, g_ptr->m_idx, &dam_max0);
 461                                 if (f4 & RF4_BR_MANA) spell_damcalc_by_spellnum(creature_ptr, MS_BR_MANA, GF_MANA, g_ptr->m_idx, &dam_max0);
 462                                 if (f4 & RF4_BR_NUKE) spell_damcalc_by_spellnum(creature_ptr, MS_BR_NUKE, GF_NUKE, g_ptr->m_idx, &dam_max0);
 463                                 if (f4 & RF4_BR_DISI) spell_damcalc_by_spellnum(creature_ptr, MS_BR_DISI, GF_DISINTEGRATE, g_ptr->m_idx, &dam_max0);
 464                         }
 465
 466                         /* Monster melee attacks */
 467                         if ((r_ptr->flags1 & RF1_NEVER_BLOW) || (d_info[creature_ptr->dungeon_idx].flags1 & DF1_NO_MELEE))
 468                         {
 469                                 dam_max += dam_max0;
 470                                 continue;
 471                         }
 472
 473                         if (!(mx <= xx + 1 && mx >= xx - 1 && my <= yy + 1 && my >= yy - 1))
 474                         {
 475                                 dam_max += dam_max0;
 476                                 continue;
 477                         }
 478
 479                         int dam_melee = 0;
 480                         for (int m = 0; m < 4; m++)
 481                         {
 482                                 /* Skip non-attacks */
 483                                 if (!r_ptr->blow[m].method || (r_ptr->blow[m].method == RBM_SHOOT)) continue;
 484
 485                                 /* Extract the attack info */
 486                                 dam_melee += blow_damcalc(m_ptr, creature_ptr, &r_ptr->blow[m]);
 487                                 if (r_ptr->blow[m].method == RBM_EXPLODE) break;
 488                         }
 489
 490                         if (dam_melee > dam_max0) dam_max0 = dam_melee;
 491                         dam_max += dam_max0;
 492                 }
 493         }
 494
 495         /* Prevent excessive warning */
 496         if (dam_max > old_damage)
 497         {
 498                 old_damage = dam_max * 3 / 2;
 499
 500                 if (dam_max > creature_ptr->chp / 2)
 501                 {
 502                         object_type *o_ptr = choose_warning_item(creature_ptr);
 503
 504                         if (o_ptr)
 505                                 object_desc(o_name, o_ptr, (OD_OMIT_PREFIX | OD_NAME_ONLY));
 506                         else
 507                                 strcpy(o_name, _("体", "body")); /* Warning ability without item */
 508                         msg_format(_("%sが鋭く震えた！", "Your %s pulsates sharply!"), o_name);
 509
 510                         disturb(creature_ptr, FALSE, TRUE);
 511                         return get_check(_("本当にこのまま進むか？", "Really want to go ahead? "));
 512                 }
 513         }
 514         else old_damage = old_damage / 2;
 515
 516         g_ptr = &creature_ptr->current_floor_ptr->grid_array[yy][xx];
 517         bool is_warning = (!easy_disarm && is_trap(creature_ptr, g_ptr->feat)) || (g_ptr->mimic && is_trap(creature_ptr, g_ptr->feat));
 518         is_warning = !one_in_(13);
 519         if (!is_warning) return TRUE;
 520
 521         object_type *o_ptr = choose_warning_item(creature_ptr);
 522         if (o_ptr != NULL)
 523                 object_desc(o_name, o_ptr, (OD_OMIT_PREFIX | OD_NAME_ONLY));
 524         else
 525                 strcpy(o_name, _("体", "body")); /* Warning ability without item */
 526         msg_format(_("%sが鋭く震えた！", "Your %s pulsates sharply!"), o_name);
 527         disturb(creature_ptr, FALSE, TRUE);
 528         return get_check(_("本当にこのまま進むか？", "Really want to go ahead? "));
 529 }