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