src/warning.c

   1
   2
   3 #include "angband.h"
   4 #include "util.h"
   5
   6 #include "artifact.h"
   7 #include "player-move.h"
   8 #include "feature.h"
   9 #include "floor.h"
  10 #include "warning.h"
  11 #include "player-status.h"
  12 #include "monster.h"
  13 #include "monster-spell.h"
  14 #include "spells.h"
  15 #include "object-flavor.h"
  16 #include "dungeon.h"
  17 #include "player-race.h"
  18
  19 /*!
  20  * @brief 警告を放つアイテムを選択する /
  21  * Choose one of items that have warning flag
  22  * Calculate spell damages
  23  * @return 警告を行う
  24  */
  25 object_type *choose_warning_item(void)
  26 {
  27         int i;
  28         int choices[INVEN_TOTAL - INVEN_RARM];
  29         int number = 0;
  30
  31         /* Paranoia -- Player has no warning ability */
  32         if (!p_ptr->warning) return NULL;
  33
  34         /* Search Inventory */
  35         for (i = INVEN_RARM; i < INVEN_TOTAL; i++)
  36         {
  37                 BIT_FLAGS flgs[TR_FLAG_SIZE];
  38                 object_type *o_ptr = &p_ptr->inventory_list[i];
  39
  40                 object_flags(o_ptr, flgs);
  41                 if (have_flag(flgs, TR_WARNING))
  42                 {
  43                         choices[number] = i;
  44                         number++;
  45                 }
  46         }
  47
  48         /* Choice one of them */
  49         return number ? &p_ptr->inventory_list[choices[randint0(number)]] : NULL;
  50 }
  51
  52 /*!
  53  * @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 /
  54  * Calculate spell damages
  55  * @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
  56  * @param typ 効果属性のID
  57  * @param dam 基本ダメージ
  58  * @param max 算出した最大ダメージを返すポインタ
  59  * @return なし
  60  */
  61 static void spell_damcalc(monster_type *m_ptr, EFFECT_ID typ, HIT_POINT dam, int *max)
  62 {
  63         monster_race *r_ptr = &r_info[m_ptr->r_idx];
  64         int          rlev = r_ptr->level;
  65         bool         ignore_wraith_form = FALSE;
  66
  67         /* Vulnerability, resistance and immunity */
  68         switch (typ)
  69         {
  70         case GF_ELEC:
  71                 if (p_ptr->immune_elec)
  72                 {
  73                         dam = 0;
  74                         ignore_wraith_form = TRUE;
  75                 }
  76                 else
  77                 {
  78                         if (p_ptr->muta3 & MUT3_VULN_ELEM) dam *= 2;
  79                         if (p_ptr->special_defense & KATA_KOUKIJIN) dam += dam / 3;
  80                         if (prace_is_(RACE_ANDROID)) dam += dam / 3;
  81                         if (p_ptr->resist_elec) dam = (dam + 2) / 3;
  82                         if (IS_OPPOSE_ELEC())
  83                                 dam = (dam + 2) / 3;
  84                 }
  85                 break;
  86
  87         case GF_POIS:
  88                 if (p_ptr->resist_pois) dam = (dam + 2) / 3;
  89                 if (IS_OPPOSE_POIS()) dam = (dam + 2) / 3;
  90                 break;
  91
  92         case GF_ACID:
  93                 if (p_ptr->immune_acid)
  94                 {
  95                         dam = 0;
  96                         ignore_wraith_form = TRUE;
  97                 }
  98                 else
  99                 {
 100                         if (p_ptr->muta3 & MUT3_VULN_ELEM) dam *= 2;
 101                         if (p_ptr->special_defense & KATA_KOUKIJIN) dam += dam / 3;
 102                         if (p_ptr->resist_acid) dam = (dam + 2) / 3;
 103                         if (IS_OPPOSE_ACID()) dam = (dam + 2) / 3;
 104                 }
 105                 break;
 106
 107         case GF_COLD:
 108         case GF_ICE:
 109                 if (p_ptr->immune_cold)
 110                 {
 111                         dam = 0;
 112                         ignore_wraith_form = TRUE;
 113                 }
 114                 else
 115                 {
 116                         if (p_ptr->muta3 & MUT3_VULN_ELEM) dam *= 2;
 117                         if (p_ptr->special_defense & KATA_KOUKIJIN) dam += dam / 3;
 118                         if (p_ptr->resist_cold) dam = (dam + 2) / 3;
 119                         if (IS_OPPOSE_COLD()) dam = (dam + 2) / 3;
 120                 }
 121                 break;
 122
 123         case GF_FIRE:
 124                 if (p_ptr->immune_fire)
 125                 {
 126                         dam = 0;
 127                         ignore_wraith_form = TRUE;
 128                 }
 129                 else
 130                 {
 131                         if (p_ptr->muta3 & MUT3_VULN_ELEM) dam *= 2;
 132                         if (prace_is_(RACE_ENT)) dam += dam / 3;
 133                         if (p_ptr->special_defense & KATA_KOUKIJIN) dam += dam / 3;
 134                         if (p_ptr->resist_fire) dam = (dam + 2) / 3;
 135                         if (IS_OPPOSE_FIRE()) dam = (dam + 2) / 3;
 136                 }
 137                 break;
 138
 139         case GF_PSY_SPEAR:
 140                 ignore_wraith_form = TRUE;
 141                 break;
 142
 143         case GF_ARROW:
 144                 if (!p_ptr->blind &&
 145                         ((p_ptr->inventory_list[INVEN_RARM].k_idx && (p_ptr->inventory_list[INVEN_RARM].name1 == ART_ZANTETSU)) ||
 146                         (p_ptr->inventory_list[INVEN_LARM].k_idx && (p_ptr->inventory_list[INVEN_LARM].name1 == ART_ZANTETSU))))
 147                 {
 148                         dam = 0;
 149                         ignore_wraith_form = TRUE;
 150                 }
 151                 break;
 152
 153         case GF_LITE:
 154                 if (p_ptr->resist_lite) dam /= 2; /* Worst case of 4 / (d4 + 7) */
 155                 if (prace_is_(RACE_VAMPIRE) || (p_ptr->mimic_form == MIMIC_VAMPIRE)) dam *= 2;
 156                 else if (prace_is_(RACE_S_FAIRY)) dam = dam * 4 / 3;
 157
 158                 /*
 159                  * Cannot use "ignore_wraith_form" strictly (for "random one damage")
 160                  * "dam *= 2;" for later "dam /= 2"
 161                  */
 162                 if (p_ptr->wraith_form) dam *= 2;
 163                 break;
 164
 165         case GF_DARK:
 166                 if (prace_is_(RACE_VAMPIRE) || (p_ptr->mimic_form == MIMIC_VAMPIRE) || p_ptr->wraith_form)
 167                 {
 168                         dam = 0;
 169                         ignore_wraith_form = TRUE;
 170                 }
 171                 else if (p_ptr->resist_dark) dam /= 2; /* Worst case of 4 / (d4 + 7) */
 172                 break;
 173
 174         case GF_SHARDS:
 175                 if (p_ptr->resist_shard) dam = dam * 3 / 4; /* Worst case of 6 / (d4 + 7) */
 176                 break;
 177
 178         case GF_SOUND:
 179                 if (p_ptr->resist_sound) dam = dam * 5 / 8; /* Worst case of 5 / (d4 + 7) */
 180                 break;
 181
 182         case GF_CONFUSION:
 183                 if (p_ptr->resist_conf) dam = dam * 5 / 8; /* Worst case of 5 / (d4 + 7) */
 184                 break;
 185
 186         case GF_CHAOS:
 187                 if (p_ptr->resist_chaos) dam = dam * 3 / 4; /* Worst case of 6 / (d4 + 7) */
 188                 break;
 189
 190         case GF_NETHER:
 191                 if (prace_is_(RACE_SPECTRE))
 192                 {
 193                         dam = 0;
 194                         ignore_wraith_form = TRUE;
 195                 }
 196                 else if (p_ptr->resist_neth) dam = dam * 3 / 4; /* Worst case of 6 / (d4 + 7) */
 197                 break;
 198
 199         case GF_DISENCHANT:
 200                 if (p_ptr->resist_disen) dam = dam * 3 / 4; /* Worst case of 6 / (d4 + 7) */
 201                 break;
 202
 203         case GF_NEXUS:
 204                 if (p_ptr->resist_nexus) dam = dam * 3 / 4; /* Worst case of 6 / (d4 + 7) */
 205                 break;
 206
 207         case GF_TIME:
 208                 if (p_ptr->resist_time) dam /= 2; /* Worst case of 4 / (d4 + 7) */
 209                 break;
 210
 211         case GF_GRAVITY:
 212                 if (p_ptr->levitation) dam = (dam * 2) / 3;
 213                 break;
 214
 215         case GF_ROCKET:
 216                 if (p_ptr->resist_shard) dam /= 2;
 217                 break;
 218
 219         case GF_NUKE:
 220                 if (p_ptr->resist_pois) dam = (2 * dam + 2) / 5;
 221                 if (IS_OPPOSE_POIS()) dam = (2 * dam + 2) / 5;
 222                 break;
 223
 224         case GF_DEATH_RAY:
 225                 if (p_ptr->mimic_form)
 226                 {
 227                         if (mimic_info[p_ptr->mimic_form].MIMIC_FLAGS & MIMIC_IS_NONLIVING)
 228                         {
 229                                 dam = 0;
 230                                 ignore_wraith_form = TRUE;
 231                         }
 232                 }
 233                 else
 234                 {
 235                         switch (p_ptr->prace)
 236                         {
 237                         case RACE_GOLEM:
 238                         case RACE_SKELETON:
 239                         case RACE_ZOMBIE:
 240                         case RACE_VAMPIRE:
 241                         case RACE_DEMON:
 242                         case RACE_SPECTRE:
 243                                 dam = 0;
 244                                 ignore_wraith_form = TRUE;
 245                                 break;
 246                         }
 247                 }
 248                 break;
 249
 250         case GF_HOLY_FIRE:
 251                 if (p_ptr->align > 10) dam /= 2;
 252                 else if (p_ptr->align < -10) dam *= 2;
 253                 break;
 254
 255         case GF_HELL_FIRE:
 256                 if (p_ptr->align > 10) dam *= 2;
 257                 break;
 258
 259         case GF_MIND_BLAST:
 260         case GF_BRAIN_SMASH:
 261                 if (100 + rlev / 2 <= MAX(5, p_ptr->skill_sav))
 262                 {
 263                         dam = 0;
 264                         ignore_wraith_form = TRUE;
 265                 }
 266                 break;
 267
 268         case GF_CAUSE_1:
 269         case GF_CAUSE_2:
 270         case GF_CAUSE_3:
 271         case GF_HAND_DOOM:
 272                 if (100 + rlev / 2 <= p_ptr->skill_sav)
 273                 {
 274                         dam = 0;
 275                         ignore_wraith_form = TRUE;
 276                 }
 277                 break;
 278
 279         case GF_CAUSE_4:
 280                 if ((100 + rlev / 2 <= p_ptr->skill_sav) && (m_ptr->r_idx != MON_KENSHIROU))
 281                 {
 282                         dam = 0;
 283                         ignore_wraith_form = TRUE;
 284                 }
 285                 break;
 286         }
 287
 288         if (p_ptr->wraith_form && !ignore_wraith_form)
 289         {
 290                 dam /= 2;
 291                 if (!dam) dam = 1;
 292         }
 293
 294         if (dam > *max) *max = dam;
 295 }
 296
 297 /*!
 298 * @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。 /
 299 * Calculate spell damages
 300 * @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
 301 * @param typ 効果属性のID
 302 * @param m_idx 魔法を行使するモンスターのID
 303 * @param max 算出した最大ダメージを返すポインタ
 304 * @return なし
 305 */
 306 void spell_damcalc_by_spellnum(int spell_num, EFFECT_ID typ, MONSTER_IDX m_idx, int *max)
 307 {
 308         monster_type *m_ptr = &current_floor_ptr->m_list[m_idx];
 309         HIT_POINT dam = monspell_damage((spell_num), m_idx, DAM_MAX);
 310         spell_damcalc(m_ptr, typ, dam, max);
 311 }
 312
 313 /*!
 314  * @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 /
 315  * Calculate blow damages
 316  * @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
 317  * @param blow_ptr モンスターの打撃能力の構造体参照ポインタ
 318  * @return 算出された最大ダメージを返す。
 319  */
 320 static int blow_damcalc(monster_type *m_ptr, monster_blow *blow_ptr)
 321 {
 322         int  dam = blow_ptr->d_dice * blow_ptr->d_side;
 323         int  dummy_max = 0;
 324         bool check_wraith_form = TRUE;
 325
 326         if (blow_ptr->method != RBM_EXPLODE)
 327         {
 328                 ARMOUR_CLASS ac = p_ptr->ac + p_ptr->to_a;
 329
 330                 switch (blow_ptr->effect)
 331                 {
 332                 case RBE_SUPERHURT:
 333                 {
 334                         int tmp_dam = dam - (dam * ((ac < 150) ? ac : 150) / 250);
 335                         dam = MAX(dam, tmp_dam * 2);
 336                         break;
 337                 }
 338
 339                 case RBE_HURT:
 340                 case RBE_SHATTER:
 341                         dam -= (dam * ((ac < 150) ? ac : 150) / 250);
 342                         break;
 343
 344                 case RBE_ACID:
 345                         spell_damcalc(m_ptr, GF_ACID, dam, &dummy_max);
 346                         dam = dummy_max;
 347                         check_wraith_form = FALSE;
 348                         break;
 349
 350                 case RBE_ELEC:
 351                         spell_damcalc(m_ptr, GF_ELEC, dam, &dummy_max);
 352                         dam = dummy_max;
 353                         check_wraith_form = FALSE;
 354                         break;
 355
 356                 case RBE_FIRE:
 357                         spell_damcalc(m_ptr, GF_FIRE, dam, &dummy_max);
 358                         dam = dummy_max;
 359                         check_wraith_form = FALSE;
 360                         break;
 361
 362                 case RBE_COLD:
 363                         spell_damcalc(m_ptr, GF_COLD, dam, &dummy_max);
 364                         dam = dummy_max;
 365                         check_wraith_form = FALSE;
 366                         break;
 367
 368                 case RBE_DR_MANA:
 369                         dam = 0;
 370                         check_wraith_form = FALSE;
 371                         break;
 372                 }
 373
 374                 if (check_wraith_form && p_ptr->wraith_form)
 375                 {
 376                         dam /= 2;
 377                         if (!dam) dam = 1;
 378                 }
 379         }
 380         else
 381         {
 382                 dam = (dam + 1) / 2;
 383                 spell_damcalc(m_ptr, mbe_info[blow_ptr->effect].explode_type, dam, &dummy_max);
 384                 dam = dummy_max;
 385         }
 386
 387         return dam;
 388 }
 389
 390 /*!
 391  * @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 /
 392  * Examine the grid (xx,yy) and warn the player if there are any danger
 393  * @param xx 危険性を調査するマスのX座標
 394  * @param yy 危険性を調査するマスのY座標
 395  * @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。
 396  */
 397 bool process_warning(POSITION xx, POSITION yy)
 398 {
 399         POSITION mx, my;
 400         grid_type *g_ptr;
 401         GAME_TEXT o_name[MAX_NLEN];
 402
 403 #define WARNING_AWARE_RANGE 12
 404         int dam_max = 0;
 405         static int old_damage = 0;
 406
 407         for (mx = xx - WARNING_AWARE_RANGE; mx < xx + WARNING_AWARE_RANGE + 1; mx++)
 408         {
 409                 for (my = yy - WARNING_AWARE_RANGE; my < yy + WARNING_AWARE_RANGE + 1; my++)
 410                 {
 411                         int dam_max0 = 0;
 412                         monster_type *m_ptr;
 413                         monster_race *r_ptr;
 414
 415                         if (!in_bounds(my, mx) || (distance(my, mx, yy, xx) > WARNING_AWARE_RANGE)) continue;
 416
 417                         g_ptr = &current_floor_ptr->grid_array[my][mx];
 418
 419                         if (!g_ptr->m_idx) continue;
 420
 421                         m_ptr = &current_floor_ptr->m_list[g_ptr->m_idx];
 422
 423                         if (MON_CSLEEP(m_ptr)) continue;
 424                         if (!is_hostile(m_ptr)) continue;
 425
 426                         r_ptr = &r_info[m_ptr->r_idx];
 427
 428                         /* Monster spells (only powerful ones)*/
 429                         if (projectable(my, mx, yy, xx))
 430                         {
 431                                 BIT_FLAGS f4 = r_ptr->flags4;
 432                                 BIT_FLAGS f5 = r_ptr->a_ability_flags1;
 433                                 BIT_FLAGS f6 = r_ptr->a_ability_flags2;
 434
 435                                 if (!(d_info[p_ptr->dungeon_idx].flags1 & DF1_NO_MAGIC))
 436                                 {
 437                                         if (f4 & RF4_BA_CHAO) spell_damcalc_by_spellnum(MS_BALL_CHAOS, GF_CHAOS, g_ptr->m_idx, &dam_max0);
 438                                         if (f5 & RF5_BA_MANA) spell_damcalc_by_spellnum(MS_BALL_MANA, GF_MANA, g_ptr->m_idx, &dam_max0);
 439                                         if (f5 & RF5_BA_DARK) spell_damcalc_by_spellnum(MS_BALL_DARK, GF_DARK, g_ptr->m_idx, &dam_max0);
 440                                         if (f5 & RF5_BA_LITE) spell_damcalc_by_spellnum(MS_STARBURST, GF_LITE, g_ptr->m_idx, &dam_max0);
 441                                         if (f6 & RF6_HAND_DOOM) spell_damcalc_by_spellnum(MS_HAND_DOOM, GF_HAND_DOOM, g_ptr->m_idx, &dam_max0);
 442                                         if (f6 & RF6_PSY_SPEAR) spell_damcalc_by_spellnum(MS_PSY_SPEAR, GF_PSY_SPEAR, g_ptr->m_idx, &dam_max0);
 443                                 }
 444                                 if (f4 & RF4_ROCKET) spell_damcalc_by_spellnum(MS_ROCKET, GF_ROCKET, g_ptr->m_idx, &dam_max0);
 445                                 if (f4 & RF4_BR_ACID) spell_damcalc_by_spellnum(MS_BR_ACID, GF_ACID, g_ptr->m_idx, &dam_max0);
 446                                 if (f4 & RF4_BR_ELEC) spell_damcalc_by_spellnum(MS_BR_ELEC, GF_ELEC, g_ptr->m_idx, &dam_max0);
 447                                 if (f4 & RF4_BR_FIRE) spell_damcalc_by_spellnum(MS_BR_FIRE, GF_FIRE, g_ptr->m_idx, &dam_max0);
 448                                 if (f4 & RF4_BR_COLD) spell_damcalc_by_spellnum(MS_BR_COLD, GF_COLD, g_ptr->m_idx, &dam_max0);
 449                                 if (f4 & RF4_BR_POIS) spell_damcalc_by_spellnum(MS_BR_POIS, GF_POIS, g_ptr->m_idx, &dam_max0);
 450                                 if (f4 & RF4_BR_NETH) spell_damcalc_by_spellnum(MS_BR_NETHER, GF_NETHER, g_ptr->m_idx, &dam_max0);
 451                                 if (f4 & RF4_BR_LITE) spell_damcalc_by_spellnum(MS_BR_LITE, GF_LITE, g_ptr->m_idx, &dam_max0);
 452                                 if (f4 & RF4_BR_DARK) spell_damcalc_by_spellnum(MS_BR_DARK, GF_DARK, g_ptr->m_idx, &dam_max0);
 453                                 if (f4 & RF4_BR_CONF) spell_damcalc_by_spellnum(MS_BR_CONF, GF_CONFUSION, g_ptr->m_idx, &dam_max0);
 454                                 if (f4 & RF4_BR_SOUN) spell_damcalc_by_spellnum(MS_BR_SOUND, GF_SOUND, g_ptr->m_idx, &dam_max0);
 455                                 if (f4 & RF4_BR_CHAO) spell_damcalc_by_spellnum(MS_BR_CHAOS, GF_CHAOS, g_ptr->m_idx, &dam_max0);
 456                                 if (f4 & RF4_BR_DISE) spell_damcalc_by_spellnum(MS_BR_DISEN, GF_DISENCHANT, g_ptr->m_idx, &dam_max0);
 457                                 if (f4 & RF4_BR_NEXU) spell_damcalc_by_spellnum(MS_BR_NEXUS, GF_NEXUS, g_ptr->m_idx, &dam_max0);
 458                                 if (f4 & RF4_BR_TIME) spell_damcalc_by_spellnum(MS_BR_TIME, GF_TIME, g_ptr->m_idx, &dam_max0);
 459                                 if (f4 & RF4_BR_INER) spell_damcalc_by_spellnum(MS_BR_INERTIA, GF_INERTIAL, g_ptr->m_idx, &dam_max0);
 460                                 if (f4 & RF4_BR_GRAV) spell_damcalc_by_spellnum(MS_BR_GRAVITY, GF_GRAVITY, g_ptr->m_idx, &dam_max0);
 461                                 if (f4 & RF4_BR_SHAR) spell_damcalc_by_spellnum(MS_BR_SHARDS, GF_SHARDS, g_ptr->m_idx, &dam_max0);
 462                                 if (f4 & RF4_BR_PLAS) spell_damcalc_by_spellnum(MS_BR_PLASMA, GF_PLASMA, g_ptr->m_idx, &dam_max0);
 463                                 if (f4 & RF4_BR_WALL) spell_damcalc_by_spellnum(MS_BR_FORCE, GF_FORCE, g_ptr->m_idx, &dam_max0);
 464                                 if (f4 & RF4_BR_MANA) spell_damcalc_by_spellnum(MS_BR_MANA, GF_MANA, g_ptr->m_idx, &dam_max0);
 465                                 if (f4 & RF4_BR_NUKE) spell_damcalc_by_spellnum(MS_BR_NUKE, GF_NUKE, g_ptr->m_idx, &dam_max0);
 466                                 if (f4 & RF4_BR_DISI) spell_damcalc_by_spellnum(MS_BR_DISI, GF_DISINTEGRATE, g_ptr->m_idx, &dam_max0);
 467                         }
 468
 469                         /* Monster melee attacks */
 470                         if (!(r_ptr->flags1 & RF1_NEVER_BLOW) && !(d_info[p_ptr->dungeon_idx].flags1 & DF1_NO_MELEE))
 471                         {
 472                                 if (mx <= xx + 1 && mx >= xx - 1 && my <= yy + 1 && my >= yy - 1)
 473                                 {
 474                                         int m;
 475                                         int dam_melee = 0;
 476                                         for (m = 0; m < 4; m++)
 477                                         {
 478                                                 /* Skip non-attacks */
 479                                                 if (!r_ptr->blow[m].method || (r_ptr->blow[m].method == RBM_SHOOT)) continue;
 480
 481                                                 /* Extract the attack info */
 482                                                 dam_melee += blow_damcalc(m_ptr, &r_ptr->blow[m]);
 483                                                 if (r_ptr->blow[m].method == RBM_EXPLODE) break;
 484                                         }
 485                                         if (dam_melee > dam_max0) dam_max0 = dam_melee;
 486                                 }
 487                         }
 488
 489                         /* Contribution from this monster */
 490                         dam_max += dam_max0;
 491                 }
 492         }
 493
 494         /* Prevent excessive warning */
 495         if (dam_max > old_damage)
 496         {
 497                 old_damage = dam_max * 3 / 2;
 498
 499                 if (dam_max > p_ptr->chp / 2)
 500                 {
 501                         object_type *o_ptr = choose_warning_item();
 502
 503                         if (o_ptr)
 504                                 object_desc(o_name, o_ptr, (OD_OMIT_PREFIX | OD_NAME_ONLY));
 505                         else
 506                                 strcpy(o_name, _("体", "body")); /* Warning ability without item */
 507                         msg_format(_("%sが鋭く震えた！", "Your %s pulsates sharply!"), o_name);
 508
 509                         disturb(FALSE, TRUE);
 510                         return get_check(_("本当にこのまま進むか？", "Really want to go ahead? "));
 511                 }
 512         }
 513         else old_damage = old_damage / 2;
 514
 515         g_ptr = &current_floor_ptr->grid_array[yy][xx];
 516         if (((!easy_disarm && is_trap(g_ptr->feat))
 517                 || (g_ptr->mimic && is_trap(g_ptr->feat))) && !one_in_(13))
 518         {
 519                 object_type *o_ptr = choose_warning_item();
 520
 521                 if (o_ptr)
 522                         object_desc(o_name, o_ptr, (OD_OMIT_PREFIX | OD_NAME_ONLY));
 523                 else
 524                         strcpy(o_name, _("体", "body")); /* Warning ability without item */
 525                 msg_format(_("%sが鋭く震えた！", "Your %s pulsates sharply!"), o_name);
 526                 disturb(FALSE, TRUE);
 527                 return get_check(_("本当にこのまま進むか？", "Really want to go ahead? "));
 528         }
 529
 530         return TRUE;
 531 }
 532