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 #include "melee.h"
  19
  20 /*!
  21  * @brief 警告を放つアイテムを選択する /
  22  * Choose one of items that have warning flag
  23  * Calculate spell damages
  24  * @return 警告を行う
  25  */
  26 object_type *choose_warning_item(void)
  27 {
  28         int i;
  29         int choices[INVEN_TOTAL - INVEN_RARM];
  30         int number = 0;
  31
  32         /* Paranoia -- Player has no warning ability */
  33         if (!p_ptr->warning) return NULL;
  34
  35         /* Search Inventory */
  36         for (i = INVEN_RARM; i < INVEN_TOTAL; i++)
  37         {
  38                 BIT_FLAGS flgs[TR_FLAG_SIZE];
  39                 object_type *o_ptr = &p_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 ? &p_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(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 (p_ptr->immune_elec)
  73                 {
  74                         dam = 0;
  75                         ignore_wraith_form = TRUE;
  76                 }
  77                 else
  78                 {
  79                         if (p_ptr->muta3 & MUT3_VULN_ELEM) dam *= 2;
  80                         if (p_ptr->special_defense & KATA_KOUKIJIN) dam += dam / 3;
  81                         if (prace_is_(RACE_ANDROID)) dam += dam / 3;
  82                         if (p_ptr->resist_elec) dam = (dam + 2) / 3;
  83                         if (IS_OPPOSE_ELEC())
  84                                 dam = (dam + 2) / 3;
  85                 }
  86                 break;
  87
  88         case GF_POIS:
  89                 if (p_ptr->resist_pois) dam = (dam + 2) / 3;
  90                 if (IS_OPPOSE_POIS()) dam = (dam + 2) / 3;
  91                 break;
  92
  93         case GF_ACID:
  94                 if (p_ptr->immune_acid)
  95                 {
  96                         dam = 0;
  97                         ignore_wraith_form = TRUE;
  98                 }
  99                 else
 100                 {
 101                         if (p_ptr->muta3 & MUT3_VULN_ELEM) dam *= 2;
 102                         if (p_ptr->special_defense & KATA_KOUKIJIN) dam += dam / 3;
 103                         if (p_ptr->resist_acid) dam = (dam + 2) / 3;
 104                         if (IS_OPPOSE_ACID()) dam = (dam + 2) / 3;
 105                 }
 106                 break;
 107
 108         case GF_COLD:
 109         case GF_ICE:
 110                 if (p_ptr->immune_cold)
 111                 {
 112                         dam = 0;
 113                         ignore_wraith_form = TRUE;
 114                 }
 115                 else
 116                 {
 117                         if (p_ptr->muta3 & MUT3_VULN_ELEM) dam *= 2;
 118                         if (p_ptr->special_defense & KATA_KOUKIJIN) dam += dam / 3;
 119                         if (p_ptr->resist_cold) dam = (dam + 2) / 3;
 120                         if (IS_OPPOSE_COLD()) dam = (dam + 2) / 3;
 121                 }
 122                 break;
 123
 124         case GF_FIRE:
 125                 if (p_ptr->immune_fire)
 126                 {
 127                         dam = 0;
 128                         ignore_wraith_form = TRUE;
 129                 }
 130                 else
 131                 {
 132                         if (p_ptr->muta3 & MUT3_VULN_ELEM) dam *= 2;
 133                         if (prace_is_(RACE_ENT)) dam += dam / 3;
 134                         if (p_ptr->special_defense & KATA_KOUKIJIN) dam += dam / 3;
 135                         if (p_ptr->resist_fire) dam = (dam + 2) / 3;
 136                         if (IS_OPPOSE_FIRE()) dam = (dam + 2) / 3;
 137                 }
 138                 break;
 139
 140         case GF_PSY_SPEAR:
 141                 ignore_wraith_form = TRUE;
 142                 break;
 143
 144         case GF_ARROW:
 145                 if (!p_ptr->blind &&
 146                         ((p_ptr->inventory_list[INVEN_RARM].k_idx && (p_ptr->inventory_list[INVEN_RARM].name1 == ART_ZANTETSU)) ||
 147                         (p_ptr->inventory_list[INVEN_LARM].k_idx && (p_ptr->inventory_list[INVEN_LARM].name1 == ART_ZANTETSU))))
 148                 {
 149                         dam = 0;
 150                         ignore_wraith_form = TRUE;
 151                 }
 152                 break;
 153
 154         case GF_LITE:
 155                 if (p_ptr->resist_lite) dam /= 2; /* Worst case of 4 / (d4 + 7) */
 156                 if (prace_is_(RACE_VAMPIRE) || (p_ptr->mimic_form == MIMIC_VAMPIRE)) dam *= 2;
 157                 else if (prace_is_(RACE_S_FAIRY)) dam = dam * 4 / 3;
 158
 159                 /*
 160                  * Cannot use "ignore_wraith_form" strictly (for "random one damage")
 161                  * "dam *= 2;" for later "dam /= 2"
 162                  */
 163                 if (p_ptr->wraith_form) dam *= 2;
 164                 break;
 165
 166         case GF_DARK:
 167                 if (prace_is_(RACE_VAMPIRE) || (p_ptr->mimic_form == MIMIC_VAMPIRE) || p_ptr->wraith_form)
 168                 {
 169                         dam = 0;
 170                         ignore_wraith_form = TRUE;
 171                 }
 172                 else if (p_ptr->resist_dark) dam /= 2; /* Worst case of 4 / (d4 + 7) */
 173                 break;
 174
 175         case GF_SHARDS:
 176                 if (p_ptr->resist_shard) dam = dam * 3 / 4; /* Worst case of 6 / (d4 + 7) */
 177                 break;
 178
 179         case GF_SOUND:
 180                 if (p_ptr->resist_sound) dam = dam * 5 / 8; /* Worst case of 5 / (d4 + 7) */
 181                 break;
 182
 183         case GF_CONFUSION:
 184                 if (p_ptr->resist_conf) dam = dam * 5 / 8; /* Worst case of 5 / (d4 + 7) */
 185                 break;
 186
 187         case GF_CHAOS:
 188                 if (p_ptr->resist_chaos) dam = dam * 3 / 4; /* Worst case of 6 / (d4 + 7) */
 189                 break;
 190
 191         case GF_NETHER:
 192                 if (prace_is_(RACE_SPECTRE))
 193                 {
 194                         dam = 0;
 195                         ignore_wraith_form = TRUE;
 196                 }
 197                 else if (p_ptr->resist_neth) dam = dam * 3 / 4; /* Worst case of 6 / (d4 + 7) */
 198                 break;
 199
 200         case GF_DISENCHANT:
 201                 if (p_ptr->resist_disen) dam = dam * 3 / 4; /* Worst case of 6 / (d4 + 7) */
 202                 break;
 203
 204         case GF_NEXUS:
 205                 if (p_ptr->resist_nexus) dam = dam * 3 / 4; /* Worst case of 6 / (d4 + 7) */
 206                 break;
 207
 208         case GF_TIME:
 209                 if (p_ptr->resist_time) dam /= 2; /* Worst case of 4 / (d4 + 7) */
 210                 break;
 211
 212         case GF_GRAVITY:
 213                 if (p_ptr->levitation) dam = (dam * 2) / 3;
 214                 break;
 215
 216         case GF_ROCKET:
 217                 if (p_ptr->resist_shard) dam /= 2;
 218                 break;
 219
 220         case GF_NUKE:
 221                 if (p_ptr->resist_pois) dam = (2 * dam + 2) / 5;
 222                 if (IS_OPPOSE_POIS()) dam = (2 * dam + 2) / 5;
 223                 break;
 224
 225         case GF_DEATH_RAY:
 226                 if (p_ptr->mimic_form)
 227                 {
 228                         if (mimic_info[p_ptr->mimic_form].MIMIC_FLAGS & MIMIC_IS_NONLIVING)
 229                         {
 230                                 dam = 0;
 231                                 ignore_wraith_form = TRUE;
 232                         }
 233                 }
 234                 else
 235                 {
 236                         switch (p_ptr->prace)
 237                         {
 238                         case RACE_GOLEM:
 239                         case RACE_SKELETON:
 240                         case RACE_ZOMBIE:
 241                         case RACE_VAMPIRE:
 242                         case RACE_DEMON:
 243                         case RACE_SPECTRE:
 244                                 dam = 0;
 245                                 ignore_wraith_form = TRUE;
 246                                 break;
 247                         }
 248                 }
 249                 break;
 250
 251         case GF_HOLY_FIRE:
 252                 if (p_ptr->align > 10) dam /= 2;
 253                 else if (p_ptr->align < -10) dam *= 2;
 254                 break;
 255
 256         case GF_HELL_FIRE:
 257                 if (p_ptr->align > 10) dam *= 2;
 258                 break;
 259
 260         case GF_MIND_BLAST:
 261         case GF_BRAIN_SMASH:
 262                 if (100 + rlev / 2 <= MAX(5, p_ptr->skill_sav))
 263                 {
 264                         dam = 0;
 265                         ignore_wraith_form = TRUE;
 266                 }
 267                 break;
 268
 269         case GF_CAUSE_1:
 270         case GF_CAUSE_2:
 271         case GF_CAUSE_3:
 272         case GF_HAND_DOOM:
 273                 if (100 + rlev / 2 <= p_ptr->skill_sav)
 274                 {
 275                         dam = 0;
 276                         ignore_wraith_form = TRUE;
 277                 }
 278                 break;
 279
 280         case GF_CAUSE_4:
 281                 if ((100 + rlev / 2 <= p_ptr->skill_sav) && (m_ptr->r_idx != MON_KENSHIROU))
 282                 {
 283                         dam = 0;
 284                         ignore_wraith_form = TRUE;
 285                 }
 286                 break;
 287         }
 288
 289         if (p_ptr->wraith_form && !ignore_wraith_form)
 290         {
 291                 dam /= 2;
 292                 if (!dam) dam = 1;
 293         }
 294
 295         if (dam > *max) *max = dam;
 296 }
 297
 298 /*!
 299 * @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。 /
 300 * Calculate spell damages
 301 * @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
 302 * @param typ 効果属性のID
 303 * @param m_idx 魔法を行使するモンスターのID
 304 * @param max 算出した最大ダメージを返すポインタ
 305 * @return なし
 306 */
 307 void spell_damcalc_by_spellnum(int spell_num, EFFECT_ID typ, MONSTER_IDX m_idx, int *max)
 308 {
 309         monster_type *m_ptr = &current_floor_ptr->m_list[m_idx];
 310         HIT_POINT dam = monspell_damage((spell_num), m_idx, DAM_MAX);
 311         spell_damcalc(m_ptr, typ, dam, max);
 312 }
 313
 314 /*!
 315  * @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 /
 316  * Calculate blow damages
 317  * @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
 318  * @param blow_ptr モンスターの打撃能力の構造体参照ポインタ
 319  * @return 算出された最大ダメージを返す。
 320  */
 321 static int blow_damcalc(monster_type *m_ptr, monster_blow *blow_ptr)
 322 {
 323         int  dam = blow_ptr->d_dice * blow_ptr->d_side;
 324         int  dummy_max = 0;
 325         bool check_wraith_form = TRUE;
 326
 327         if (blow_ptr->method != RBM_EXPLODE)
 328         {
 329                 ARMOUR_CLASS ac = p_ptr->ac + p_ptr->to_a;
 330
 331                 switch (blow_ptr->effect)
 332                 {
 333                 case RBE_SUPERHURT:
 334                 {
 335                         int tmp_dam = dam - (dam * ((ac < 150) ? ac : 150) / 250);
 336                         dam = MAX(dam, tmp_dam * 2);
 337                         break;
 338                 }
 339
 340                 case RBE_HURT:
 341                 case RBE_SHATTER:
 342                         dam -= (dam * ((ac < 150) ? ac : 150) / 250);
 343                         break;
 344
 345                 case RBE_ACID:
 346                         spell_damcalc(m_ptr, GF_ACID, dam, &dummy_max);
 347                         dam = dummy_max;
 348                         check_wraith_form = FALSE;
 349                         break;
 350
 351                 case RBE_ELEC:
 352                         spell_damcalc(m_ptr, GF_ELEC, dam, &dummy_max);
 353                         dam = dummy_max;
 354                         check_wraith_form = FALSE;
 355                         break;
 356
 357                 case RBE_FIRE:
 358                         spell_damcalc(m_ptr, GF_FIRE, dam, &dummy_max);
 359                         dam = dummy_max;
 360                         check_wraith_form = FALSE;
 361                         break;
 362
 363                 case RBE_COLD:
 364                         spell_damcalc(m_ptr, GF_COLD, dam, &dummy_max);
 365                         dam = dummy_max;
 366                         check_wraith_form = FALSE;
 367                         break;
 368
 369                 case RBE_DR_MANA:
 370                         dam = 0;
 371                         check_wraith_form = FALSE;
 372                         break;
 373                 }
 374
 375                 if (check_wraith_form && p_ptr->wraith_form)
 376                 {
 377                         dam /= 2;
 378                         if (!dam) dam = 1;
 379                 }
 380         }
 381         else
 382         {
 383                 dam = (dam + 1) / 2;
 384                 spell_damcalc(m_ptr, mbe_info[blow_ptr->effect].explode_type, dam, &dummy_max);
 385                 dam = dummy_max;
 386         }
 387
 388         return dam;
 389 }
 390
 391 /*!
 392  * @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 /
 393  * Examine the grid (xx,yy) and warn the player if there are any danger
 394  * @param xx 危険性を調査するマスのX座標
 395  * @param yy 危険性を調査するマスのY座標
 396  * @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。
 397  */
 398 bool process_warning(POSITION xx, POSITION yy)
 399 {
 400         POSITION mx, my;
 401         grid_type *g_ptr;
 402         GAME_TEXT o_name[MAX_NLEN];
 403
 404 #define WARNING_AWARE_RANGE 12
 405         int dam_max = 0;
 406         static int old_damage = 0;
 407
 408         for (mx = xx - WARNING_AWARE_RANGE; mx < xx + WARNING_AWARE_RANGE + 1; mx++)
 409         {
 410                 for (my = yy - WARNING_AWARE_RANGE; my < yy + WARNING_AWARE_RANGE + 1; my++)
 411                 {
 412                         int dam_max0 = 0;
 413                         monster_type *m_ptr;
 414                         monster_race *r_ptr;
 415
 416                         if (!in_bounds(my, mx) || (distance(my, mx, yy, xx) > WARNING_AWARE_RANGE)) continue;
 417
 418                         g_ptr = &current_floor_ptr->grid_array[my][mx];
 419
 420                         if (!g_ptr->m_idx) continue;
 421
 422                         m_ptr = &current_floor_ptr->m_list[g_ptr->m_idx];
 423
 424                         if (MON_CSLEEP(m_ptr)) continue;
 425                         if (!is_hostile(m_ptr)) continue;
 426
 427                         r_ptr = &r_info[m_ptr->r_idx];
 428
 429                         /* Monster spells (only powerful ones)*/
 430                         if (projectable(my, mx, yy, xx))
 431                         {
 432                                 BIT_FLAGS f4 = r_ptr->flags4;
 433                                 BIT_FLAGS f5 = r_ptr->a_ability_flags1;
 434                                 BIT_FLAGS f6 = r_ptr->a_ability_flags2;
 435
 436                                 if (!(d_info[p_ptr->dungeon_idx].flags1 & DF1_NO_MAGIC))
 437                                 {
 438                                         if (f4 & RF4_BA_CHAO) spell_damcalc_by_spellnum(MS_BALL_CHAOS, GF_CHAOS, g_ptr->m_idx, &dam_max0);
 439                                         if (f5 & RF5_BA_MANA) spell_damcalc_by_spellnum(MS_BALL_MANA, GF_MANA, g_ptr->m_idx, &dam_max0);
 440                                         if (f5 & RF5_BA_DARK) spell_damcalc_by_spellnum(MS_BALL_DARK, GF_DARK, g_ptr->m_idx, &dam_max0);
 441                                         if (f5 & RF5_BA_LITE) spell_damcalc_by_spellnum(MS_STARBURST, GF_LITE, g_ptr->m_idx, &dam_max0);
 442                                         if (f6 & RF6_HAND_DOOM) spell_damcalc_by_spellnum(MS_HAND_DOOM, GF_HAND_DOOM, g_ptr->m_idx, &dam_max0);
 443                                         if (f6 & RF6_PSY_SPEAR) spell_damcalc_by_spellnum(MS_PSY_SPEAR, GF_PSY_SPEAR, g_ptr->m_idx, &dam_max0);
 444                                 }
 445                                 if (f4 & RF4_ROCKET) spell_damcalc_by_spellnum(MS_ROCKET, GF_ROCKET, g_ptr->m_idx, &dam_max0);
 446                                 if (f4 & RF4_BR_ACID) spell_damcalc_by_spellnum(MS_BR_ACID, GF_ACID, g_ptr->m_idx, &dam_max0);
 447                                 if (f4 & RF4_BR_ELEC) spell_damcalc_by_spellnum(MS_BR_ELEC, GF_ELEC, g_ptr->m_idx, &dam_max0);
 448                                 if (f4 & RF4_BR_FIRE) spell_damcalc_by_spellnum(MS_BR_FIRE, GF_FIRE, g_ptr->m_idx, &dam_max0);
 449                                 if (f4 & RF4_BR_COLD) spell_damcalc_by_spellnum(MS_BR_COLD, GF_COLD, g_ptr->m_idx, &dam_max0);
 450                                 if (f4 & RF4_BR_POIS) spell_damcalc_by_spellnum(MS_BR_POIS, GF_POIS, g_ptr->m_idx, &dam_max0);
 451                                 if (f4 & RF4_BR_NETH) spell_damcalc_by_spellnum(MS_BR_NETHER, GF_NETHER, g_ptr->m_idx, &dam_max0);
 452                                 if (f4 & RF4_BR_LITE) spell_damcalc_by_spellnum(MS_BR_LITE, GF_LITE, g_ptr->m_idx, &dam_max0);
 453                                 if (f4 & RF4_BR_DARK) spell_damcalc_by_spellnum(MS_BR_DARK, GF_DARK, g_ptr->m_idx, &dam_max0);
 454                                 if (f4 & RF4_BR_CONF) spell_damcalc_by_spellnum(MS_BR_CONF, GF_CONFUSION, g_ptr->m_idx, &dam_max0);
 455                                 if (f4 & RF4_BR_SOUN) spell_damcalc_by_spellnum(MS_BR_SOUND, GF_SOUND, g_ptr->m_idx, &dam_max0);
 456                                 if (f4 & RF4_BR_CHAO) spell_damcalc_by_spellnum(MS_BR_CHAOS, GF_CHAOS, g_ptr->m_idx, &dam_max0);
 457                                 if (f4 & RF4_BR_DISE) spell_damcalc_by_spellnum(MS_BR_DISEN, GF_DISENCHANT, g_ptr->m_idx, &dam_max0);
 458                                 if (f4 & RF4_BR_NEXU) spell_damcalc_by_spellnum(MS_BR_NEXUS, GF_NEXUS, g_ptr->m_idx, &dam_max0);
 459                                 if (f4 & RF4_BR_TIME) spell_damcalc_by_spellnum(MS_BR_TIME, GF_TIME, g_ptr->m_idx, &dam_max0);
 460                                 if (f4 & RF4_BR_INER) spell_damcalc_by_spellnum(MS_BR_INERTIA, GF_INERTIAL, g_ptr->m_idx, &dam_max0);
 461                                 if (f4 & RF4_BR_GRAV) spell_damcalc_by_spellnum(MS_BR_GRAVITY, GF_GRAVITY, g_ptr->m_idx, &dam_max0);
 462                                 if (f4 & RF4_BR_SHAR) spell_damcalc_by_spellnum(MS_BR_SHARDS, GF_SHARDS, g_ptr->m_idx, &dam_max0);
 463                                 if (f4 & RF4_BR_PLAS) spell_damcalc_by_spellnum(MS_BR_PLASMA, GF_PLASMA, g_ptr->m_idx, &dam_max0);
 464                                 if (f4 & RF4_BR_WALL) spell_damcalc_by_spellnum(MS_BR_FORCE, GF_FORCE, g_ptr->m_idx, &dam_max0);
 465                                 if (f4 & RF4_BR_MANA) spell_damcalc_by_spellnum(MS_BR_MANA, GF_MANA, g_ptr->m_idx, &dam_max0);
 466                                 if (f4 & RF4_BR_NUKE) spell_damcalc_by_spellnum(MS_BR_NUKE, GF_NUKE, g_ptr->m_idx, &dam_max0);
 467                                 if (f4 & RF4_BR_DISI) spell_damcalc_by_spellnum(MS_BR_DISI, GF_DISINTEGRATE, g_ptr->m_idx, &dam_max0);
 468                         }
 469
 470                         /* Monster melee attacks */
 471                         if (!(r_ptr->flags1 & RF1_NEVER_BLOW) && !(d_info[p_ptr->dungeon_idx].flags1 & DF1_NO_MELEE))
 472                         {
 473                                 if (mx <= xx + 1 && mx >= xx - 1 && my <= yy + 1 && my >= yy - 1)
 474                                 {
 475                                         int m;
 476                                         int dam_melee = 0;
 477                                         for (m = 0; m < 4; m++)
 478                                         {
 479                                                 /* Skip non-attacks */
 480                                                 if (!r_ptr->blow[m].method || (r_ptr->blow[m].method == RBM_SHOOT)) continue;
 481
 482                                                 /* Extract the attack info */
 483                                                 dam_melee += blow_damcalc(m_ptr, &r_ptr->blow[m]);
 484                                                 if (r_ptr->blow[m].method == RBM_EXPLODE) break;
 485                                         }
 486                                         if (dam_melee > dam_max0) dam_max0 = dam_melee;
 487                                 }
 488                         }
 489
 490                         /* Contribution from this monster */
 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 > p_ptr->chp / 2)
 501                 {
 502                         object_type *o_ptr = choose_warning_item();
 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(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 = &current_floor_ptr->grid_array[yy][xx];
 517         if (((!easy_disarm && is_trap(g_ptr->feat))
 518                 || (g_ptr->mimic && is_trap(g_ptr->feat))) && !one_in_(13))
 519         {
 520                 object_type *o_ptr = choose_warning_item();
 521
 522                 if (o_ptr)
 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(FALSE, TRUE);
 528                 return get_check(_("本当にこのまま進むか？", "Really want to go ahead? "));
 529         }
 530
 531         return TRUE;
 532 }
 533