src/warning.c

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