/**
* Creatures can cast spells, shoot missiles, and breathe.
*
* Returns "true" if a spell (or whatever) was (successfully) cast.
*
* XXX XXX XXX This function could use some work, but remember to
* keep it as optimized as possible, while retaining generic code.
*
* Verify the various "blind-ness" checks in the code.
*
* XXX XXX XXX Note that several effects should really not be "seen"
* if the player is blind.
*
* Perhaps monsters should breathe at locations *near* the player,
* since this would allow them to inflict "partial" damage.
*
* Perhaps smart monsters should decline to use "bolt" spells if
* there is a monster in the way, unless they wish to kill it.
*
* It will not be possible to "correctly" handle the case in which a
* monster attempts to attack a location which is thought to contain
* the player, but which in fact is nowhere near the player, since this
* might induce all sorts of messages about the attack itself, and about
* the effects of the attack, which the player might or might not be in
* a position to observe. Thus, for simplicity, it is probably best to
* only allow "faulty" attacks by a monster if one of the important grids
* (probably the initial or final grid) is in fact in view of the player.
* It may be necessary to actually prevent spell attacks except when the
* monster actually has line of sight to the player. Note that a monster
* could be left in a bizarre situation after the player ducked behind a
* pillar and then teleported away, for example.
*
* Note that this function attempts to optimize the use of spells for the
* cases in which the monster has no spells, or has spells but cannot use
* them, or has spells but they will have no "useful" effect. Note that
* this function has been an efficiency bottleneck in the past.
*
* Note the special "MFLAG_NICE" flag, which prevents a monster from using
* any spell attacks until the player has had a single chance to move.
*/
bool make_attack_spell(struct monster *mon)
{
int chance, thrown_spell, rlev, failrate;
bitflag f[RSF_SIZE];
struct monster_lore *lore = get_lore(mon->race);
char m_name[80], m_poss[80], ddesc[80];
/* Player position */
int px = player->px;
int py = player->py;
/* Extract the blind-ness */
bool blind = (player->timed[TMD_BLIND] ? true : false);
/* Extract the "see-able-ness" */
bool seen = (!blind && mflag_has(mon->mflag, MFLAG_VISIBLE));
/* Assume "normal" target */
bool normal = true;
/* Cannot cast spells when confused */
if (mon->m_timed[MON_TMD_CONF]) return (false);
/* Cannot cast spells when nice */
if (mflag_has(mon->mflag, MFLAG_NICE)) return false;
/* Hack -- Extract the spell probability */
chance = (mon->race->freq_innate + mon->race->freq_spell) / 2;
/* Not allowed to cast spells */
if (!chance) return false;
/* Only do spells occasionally */
if (randint0(100) >= chance) return false;
/* Hack -- require projectable player */
if (normal) {
/* Check range */
if (mon->cdis > z_info->max_range)
return false;
/* Check path */
if (!projectable(cave, mon->fy, mon->fx, py, px, PROJECT_NONE))
return false;
}
/* Extract the monster level */
rlev = ((mon->race->level >= 1) ? mon->race->level : 1);
/* Extract the racial spell flags */
rsf_copy(f, mon->race->spell_flags);
/* Allow "desperate" spells */
if (rf_has(mon->race->flags, RF_SMART) &&
mon->hp < mon->maxhp / 10 &&
randint0(100) < 50)
/* Require intelligent spells */
ignore_spells(f, RST_BOLT | RST_BALL | RST_BREATH | RST_ATTACK | RST_INNATE);
/* Remove the "ineffective" spells */
remove_bad_spells(mon, f);
/* Check whether summons and bolts are worth it. */
if (!rf_has(mon->race->flags, RF_STUPID)) {
/* Check for a clean bolt shot */
if (test_spells(f, RST_BOLT) &&
!projectable(cave, mon->fy, mon->fx, py, px, PROJECT_STOP))
/* Remove spells that will only hurt friends */
ignore_spells(f, RST_BOLT);
/* Check for a possible summon */
if (!(summon_possible(mon->fy, mon->fx)))
/* Remove summoning spells */
ignore_spells(f, RST_SUMMON);
}
/* No spells left */
if (rsf_is_empty(f)) return false;
/* Get the monster name (or "it") */
monster_desc(m_name, sizeof(m_name), mon, MDESC_STANDARD);
/* Get the monster possessive ("his"/"her"/"its") */
monster_desc(m_poss, sizeof(m_poss), mon, MDESC_PRO_VIS | MDESC_POSS);
/* Get the "died from" name */
monster_desc(ddesc, sizeof(ddesc), mon, MDESC_DIED_FROM);
/* Choose a spell to cast */
thrown_spell = choose_attack_spell(f);
/* Abort if no spell was chosen */
if (!thrown_spell) return false;
/* If we see an unaware monster try to cast a spell, become aware of it */
if (mflag_has(mon->mflag, MFLAG_UNAWARE))
become_aware(mon);
/* Calculate spell failure rate */
failrate = 25 - (rlev + 3) / 4;
if (mon->m_timed[MON_TMD_FEAR])
failrate += 20;
/* Stupid monsters will never fail (for jellies and such) */
if (rf_has(mon->race->flags, RF_STUPID))
failrate = 0;
/* Check for spell failure (innate attacks never fail) */
if (!mon_spell_is_innate(thrown_spell) && (randint0(100) < failrate)) {
/* Message */
msg("%s tries to cast a spell, but fails.", m_name);
return true;
}
/* Cast the spell. */
disturb(player, 1);
do_mon_spell(thrown_spell, mon, seen);
/* Remember what the monster did to us */
if (seen) {
rsf_on(lore->spell_flags, thrown_spell);
/* Innate spell */
if (mon_spell_is_innate(thrown_spell)) {
if (lore->cast_innate < UCHAR_MAX)
lore->cast_innate++;
} else {
/* Bolt or Ball, or Special spell */
if (lore->cast_spell < UCHAR_MAX)
lore->cast_spell++;
}
}
/* Always take note of monsters that kill you */
if (player->is_dead && (lore->deaths < SHRT_MAX)) {
lore->deaths++;
}
/* Record any new info */
lore_update(mon->race, lore);
/* A spell was cast */
return true;
}
/*!
* @brief モンスターが敵モンスターに特殊能力を使う処理のメインルーチン /
* Monster tries to 'cast a spell' (or breath, etc) at another monster.
* @param m_idx 術者のモンスターID
* @return 実際に特殊能力を使った場合TRUEを返す
* @details
* The player is only disturbed if able to be affected by the spell.
*/
bool monst_spell_monst(int m_idx)
{
int y = 0, x = 0;
int i, k, t_idx = 0;
int thrown_spell;
int dam = 0;
int start;
int plus = 1;
byte spell[96], num = 0;
char m_name[160];
char t_name[160];
#ifndef JP
char m_poss[160];
#endif
monster_type *m_ptr = &m_list[m_idx];
monster_type *t_ptr = NULL;
monster_race *r_ptr = &r_info[m_ptr->r_idx];
monster_race *tr_ptr = NULL;
u32b f4, f5, f6;
bool see_m = is_seen(m_ptr);
bool maneable = player_has_los_bold(m_ptr->fy, m_ptr->fx);
bool see_t;
bool see_either;
bool pet = is_pet(m_ptr);
bool in_no_magic_dungeon = (d_info[dungeon_type].flags1 & DF1_NO_MAGIC) && dun_level
&& (!p_ptr->inside_quest || is_fixed_quest_idx(p_ptr->inside_quest));
bool can_use_lite_area = FALSE;
bool can_remember;
/* Cannot cast spells when confused */
if (MON_CONFUSED(m_ptr)) return (FALSE);
/* Extract the racial spell flags */
f4 = r_ptr->flags4;
f5 = r_ptr->a_ability_flags1;
f6 = r_ptr->a_ability_flags2;
/* Target is given for pet? */
if (pet_t_m_idx && pet)
{
t_idx = pet_t_m_idx;
t_ptr = &m_list[t_idx];
/* Cancel if not projectable (for now) */
if ((m_idx == t_idx) || !projectable(m_ptr->fy, m_ptr->fx, t_ptr->fy, t_ptr->fx))
{
t_idx = 0;
}
}
/* Is there counter attack target? */
if (!t_idx && m_ptr->target_y)
{
t_idx = cave[m_ptr->target_y][m_ptr->target_x].m_idx;
if (t_idx)
{
t_ptr = &m_list[t_idx];
/* Cancel if neither enemy nor a given target */
if ((m_idx == t_idx) ||
((t_idx != pet_t_m_idx) && !are_enemies(m_ptr, t_ptr)))
{
t_idx = 0;
}
/* Allow only summoning etc.. if not projectable */
else if (!projectable(m_ptr->fy, m_ptr->fx, t_ptr->fy, t_ptr->fx))
{
f4 &= (RF4_INDIRECT_MASK);
f5 &= (RF5_INDIRECT_MASK);
f6 &= (RF6_INDIRECT_MASK);
}
}
}
/* Look for enemies normally */
if (!t_idx)
{
bool success = FALSE;
if (p_ptr->inside_battle)
{
start = randint1(m_max-1) + m_max;
if (randint0(2)) plus = -1;
}
else start = m_max + 1;
/* Scan thru all monsters */
for (i = start; ((i < start + m_max) && (i > start - m_max)); i += plus)
{
int dummy = (i % m_max);
if (!dummy) continue;
t_idx = dummy;
t_ptr = &m_list[t_idx];
/* Skip dead monsters */
if (!t_ptr->r_idx) continue;
/* Monster must be 'an enemy' */
if ((m_idx == t_idx) || !are_enemies(m_ptr, t_ptr)) continue;
/* Monster must be projectable */
if (!projectable(m_ptr->fy, m_ptr->fx, t_ptr->fy, t_ptr->fx)) continue;
/* Get it */
success = TRUE;
break;
}
/* No enemy found */
if (!success) return FALSE;
}
/* OK -- we've got a target */
y = t_ptr->fy;
x = t_ptr->fx;
tr_ptr = &r_info[t_ptr->r_idx];
/* Forget old counter attack target */
reset_target(m_ptr);
/* Remove unimplemented spells */
f6 &= ~(RF6_WORLD | RF6_TRAPS | RF6_FORGET);
if (f4 & RF4_BR_LITE)
{
if (!los(m_ptr->fy, m_ptr->fx, t_ptr->fy, t_ptr->fx))
f4 &= ~(RF4_BR_LITE);
}
/* Remove unimplemented special moves */
if (f6 & RF6_SPECIAL)
{
if ((m_ptr->r_idx != MON_ROLENTO) && (r_ptr->d_char != 'B'))
f6 &= ~(RF6_SPECIAL);
}
if (f6 & RF6_DARKNESS)
{
bool vs_ninja = (p_ptr->pclass == CLASS_NINJA) && !is_hostile(t_ptr);
if (vs_ninja &&
!(r_ptr->flags3 & (RF3_UNDEAD | RF3_HURT_LITE)) &&
!(r_ptr->flags7 & RF7_DARK_MASK))
can_use_lite_area = TRUE;
if (!(r_ptr->flags2 & RF2_STUPID))
{
if (d_info[dungeon_type].flags1 & DF1_DARKNESS) f6 &= ~(RF6_DARKNESS);
else if (vs_ninja && !can_use_lite_area) f6 &= ~(RF6_DARKNESS);
}
}
if (in_no_magic_dungeon && !(r_ptr->flags2 & RF2_STUPID))
{
f4 &= (RF4_NOMAGIC_MASK);
f5 &= (RF5_NOMAGIC_MASK);
f6 &= (RF6_NOMAGIC_MASK);
}
if (p_ptr->inside_arena || p_ptr->inside_battle)
{
f4 &= ~(RF4_SUMMON_MASK);
f5 &= ~(RF5_SUMMON_MASK);
f6 &= ~(RF6_SUMMON_MASK | RF6_TELE_LEVEL);
if (m_ptr->r_idx == MON_ROLENTO) f6 &= ~(RF6_SPECIAL);
}
if (p_ptr->inside_battle && !one_in_(3))
{
f6 &= ~(RF6_HEAL);
}
if (m_idx == p_ptr->riding)
{
f4 &= ~(RF4_RIDING_MASK);
f5 &= ~(RF5_RIDING_MASK);
f6 &= ~(RF6_RIDING_MASK);
}
if (pet)
{
f4 &= ~(RF4_SHRIEK);
f6 &= ~(RF6_DARKNESS | RF6_TRAPS);
if (!(p_ptr->pet_extra_flags & PF_TELEPORT))
{
f6 &= ~(RF6_BLINK | RF6_TPORT | RF6_TELE_TO | RF6_TELE_AWAY | RF6_TELE_LEVEL);
}
if (!(p_ptr->pet_extra_flags & PF_ATTACK_SPELL))
{
f4 &= ~(RF4_ATTACK_MASK);
f5 &= ~(RF5_ATTACK_MASK);
f6 &= ~(RF6_ATTACK_MASK);
}
if (!(p_ptr->pet_extra_flags & PF_SUMMON_SPELL))
{
f4 &= ~(RF4_SUMMON_MASK);
f5 &= ~(RF5_SUMMON_MASK);
f6 &= ~(RF6_SUMMON_MASK);
}
/* Prevent collateral damage */
if (!(p_ptr->pet_extra_flags & PF_BALL_SPELL) && (m_idx != p_ptr->riding))
{
if ((f4 & (RF4_BALL_MASK & ~(RF4_ROCKET))) ||
(f5 & RF5_BALL_MASK) ||
(f6 & RF6_BALL_MASK))
{
int real_y = y;
int real_x = x;
get_project_point(m_ptr->fy, m_ptr->fx, &real_y, &real_x, 0L);
if (projectable(real_y, real_x, p_ptr->y, p_ptr->x))
{
int dist = distance(real_y, real_x, p_ptr->y, p_ptr->x);
if (dist <= 2)
{
f4 &= ~(RF4_BALL_MASK & ~(RF4_ROCKET));
f5 &= ~(RF5_BALL_MASK);
f6 &= ~(RF6_BALL_MASK);
}
else if (dist <= 4)
{
f4 &= ~(RF4_BIG_BALL_MASK);
f5 &= ~(RF5_BIG_BALL_MASK);
f6 &= ~(RF6_BIG_BALL_MASK);
}
}
else if (f5 & RF5_BA_LITE)
{
if ((distance(real_y, real_x, p_ptr->y, p_ptr->x) <= 4) && los(real_y, real_x, p_ptr->y, p_ptr->x))
f5 &= ~(RF5_BA_LITE);
}
}
if (f4 & RF4_ROCKET)
{
int real_y = y;
int real_x = x;
get_project_point(m_ptr->fy, m_ptr->fx, &real_y, &real_x, PROJECT_STOP);
if (projectable(real_y, real_x, p_ptr->y, p_ptr->x) && (distance(real_y, real_x, p_ptr->y, p_ptr->x) <= 2))
f4 &= ~(RF4_ROCKET);
}
if (((f4 & RF4_BEAM_MASK) ||
(f5 & RF5_BEAM_MASK) ||
(f6 & RF6_BEAM_MASK)) &&
!direct_beam(m_ptr->fy, m_ptr->fx, t_ptr->fy, t_ptr->fx, m_ptr))
{
f4 &= ~(RF4_BEAM_MASK);
f5 &= ~(RF5_BEAM_MASK);
f6 &= ~(RF6_BEAM_MASK);
}
if ((f4 & RF4_BREATH_MASK) ||
(f5 & RF5_BREATH_MASK) ||
(f6 & RF6_BREATH_MASK))
{
/* Expected breath radius */
int rad = (r_ptr->flags2 & RF2_POWERFUL) ? 3 : 2;
if (!breath_direct(m_ptr->fy, m_ptr->fx, t_ptr->fy, t_ptr->fx, rad, 0, TRUE))
{
f4 &= ~(RF4_BREATH_MASK);
f5 &= ~(RF5_BREATH_MASK);
f6 &= ~(RF6_BREATH_MASK);
}
else if ((f4 & RF4_BR_LITE) &&
!breath_direct(m_ptr->fy, m_ptr->fx, t_ptr->fy, t_ptr->fx, rad, GF_LITE, TRUE))
{
f4 &= ~(RF4_BR_LITE);
}
else if ((f4 & RF4_BR_DISI) &&
!breath_direct(m_ptr->fy, m_ptr->fx, t_ptr->fy, t_ptr->fx, rad, GF_DISINTEGRATE, TRUE))
{
f4 &= ~(RF4_BR_DISI);
}
}
}
/* Special moves restriction */
if (f6 & RF6_SPECIAL)
{
if (m_ptr->r_idx == MON_ROLENTO)
{
if ((p_ptr->pet_extra_flags & (PF_ATTACK_SPELL | PF_SUMMON_SPELL)) != (PF_ATTACK_SPELL | PF_SUMMON_SPELL))
f6 &= ~(RF6_SPECIAL);
}
else if (r_ptr->d_char == 'B')
{
if ((p_ptr->pet_extra_flags & (PF_ATTACK_SPELL | PF_TELEPORT)) != (PF_ATTACK_SPELL | PF_TELEPORT))
f6 &= ~(RF6_SPECIAL);
}
else f6 &= ~(RF6_SPECIAL);
}
}
/* Remove some spells if necessary */
if (!(r_ptr->flags2 & RF2_STUPID))
{
/* Check for a clean bolt shot */
if (((f4 & RF4_BOLT_MASK) ||
(f5 & RF5_BOLT_MASK) ||
(f6 & RF6_BOLT_MASK)) &&
!clean_shot(m_ptr->fy, m_ptr->fx, t_ptr->fy, t_ptr->fx, pet))
{
f4 &= ~(RF4_BOLT_MASK);
f5 &= ~(RF5_BOLT_MASK);
f6 &= ~(RF6_BOLT_MASK);
}
/* Check for a possible summon */
if (((f4 & RF4_SUMMON_MASK) ||
(f5 & RF5_SUMMON_MASK) ||
(f6 & RF6_SUMMON_MASK)) &&
!(summon_possible(t_ptr->fy, t_ptr->fx)))
{
/* Remove summoning spells */
f4 &= ~(RF4_SUMMON_MASK);
f5 &= ~(RF5_SUMMON_MASK);
f6 &= ~(RF6_SUMMON_MASK);
}
/* Dispel magic */
if ((f4 & RF4_DISPEL) && !dispel_check_monster(m_idx, t_idx))
{
/* Remove dispel spell */
f4 &= ~(RF4_DISPEL);
}
/* Check for a possible raise dead */
if ((f6 & RF6_RAISE_DEAD) && !raise_possible(m_ptr))
{
/* Remove raise dead spell */
f6 &= ~(RF6_RAISE_DEAD);
}
/* Special moves restriction */
if (f6 & RF6_SPECIAL)
{
if ((m_ptr->r_idx == MON_ROLENTO) && !summon_possible(t_ptr->fy, t_ptr->fx))
{
f6 &= ~(RF6_SPECIAL);
}
}
}
if (r_ptr->flags2 & RF2_SMART)
{
/* Hack -- allow "desperate" spells */
if ((m_ptr->hp < m_ptr->maxhp / 10) &&
(randint0(100) < 50))
{
/* Require intelligent spells */
f4 &= (RF4_INT_MASK);
f5 &= (RF5_INT_MASK);
f6 &= (RF6_INT_MASK);
}
/* Hack -- decline "teleport level" in some case */
if ((f6 & RF6_TELE_LEVEL) && TELE_LEVEL_IS_INEFF((t_idx == p_ptr->riding) ? 0 : t_idx))
{
f6 &= ~(RF6_TELE_LEVEL);
}
}
/* No spells left */
if (!f4 && !f5 && !f6) return FALSE;
/* Extract the "inate" spells */
for (k = 0; k < 32; k++)
{
if (f4 & (1L << k)) spell[num++] = k + RF4_SPELL_START;
}
/* Extract the "normal" spells */
for (k = 0; k < 32; k++)
{
if (f5 & (1L << k)) spell[num++] = k + RF5_SPELL_START;
}
/* Extract the "bizarre" spells */
for (k = 0; k < 32; k++)
{
if (f6 & (1L << k)) spell[num++] = k + RF6_SPELL_START;
}
/* No spells left */
if (!num) return (FALSE);
/* Stop if player is dead or gone */
if (!p_ptr->playing || p_ptr->is_dead) return (FALSE);
/* Handle "leaving" */
if (p_ptr->leaving) return (FALSE);
/* Get the monster name (or "it") */
monster_desc(m_name, m_ptr, 0x00);
#ifndef JP
/* Get the monster possessive ("his"/"her"/"its") */
monster_desc(m_poss, m_ptr, MD_PRON_VISIBLE | MD_POSSESSIVE);
#endif
/* Get the target's name (or "it") */
monster_desc(t_name, t_ptr, 0x00);
/* Choose a spell to cast */
thrown_spell = spell[randint0(num)];
see_t = is_seen(t_ptr);
see_either = (see_m || see_t);
if (p_ptr->riding && (m_idx == p_ptr->riding)) disturb(1, 1);
/* Check for spell failure (inate attacks never fail) */
if (!spell_is_inate(thrown_spell) && (in_no_magic_dungeon || (MON_STUNNED(m_ptr) && one_in_(2))))
{
disturb(1, 1);
/* Message */
if (see_m) msg_format(_("%^sは呪文を唱えようとしたが失敗した。",
"%^s tries to cast a spell, but fails."), m_name);
return (TRUE);
}
/* Hex: Anti Magic Barrier */
if (!spell_is_inate(thrown_spell) && magic_barrier(m_idx))
{
if (see_m) msg_format(_("反魔法バリアが%^sの呪文をかき消した。",
"Anti magic barrier cancels the spell which %^s casts."), m_name);
return (TRUE);
}
can_remember = is_original_ap_and_seen(m_ptr);
dam = monspell_to_monster(thrown_spell, y, x, m_idx, t_idx);
if (dam < 0)return FALSE;
if (m_ptr->ml && maneable && !world_monster && !p_ptr->blind && (p_ptr->pclass == CLASS_IMITATOR))
{
if (thrown_spell != 167) /* Not RF6_SPECIAL */
{
if (p_ptr->mane_num == MAX_MANE)
{
p_ptr->mane_num--;
for (i = 0; i < p_ptr->mane_num - 1; i++)
{
p_ptr->mane_spell[i] = p_ptr->mane_spell[i+1];
p_ptr->mane_dam[i] = p_ptr->mane_dam[i+1];
}
}
p_ptr->mane_spell[p_ptr->mane_num] = thrown_spell - RF4_SPELL_START;
p_ptr->mane_dam[p_ptr->mane_num] = dam;
p_ptr->mane_num++;
new_mane = TRUE;
p_ptr->redraw |= (PR_IMITATION);
}
}
/* Remember what the monster did, if we saw it */
if (can_remember)
{
/* Inate spell */
if (thrown_spell < RF4_SPELL_START + RF4_SPELL_SIZE)
{
r_ptr->r_flags4 |= (1L << (thrown_spell - RF4_SPELL_START));
if (r_ptr->r_cast_spell < MAX_UCHAR) r_ptr->r_cast_spell++;
}
/* Bolt or Ball */
else if (thrown_spell < RF5_SPELL_START + RF5_SPELL_SIZE)
{
r_ptr->r_flags5 |= (1L << (thrown_spell - RF5_SPELL_START));
if (r_ptr->r_cast_spell < MAX_UCHAR) r_ptr->r_cast_spell++;
}
/* Special spell */
else if (thrown_spell < RF6_SPELL_START + RF6_SPELL_SIZE)
{
r_ptr->r_flags6 |= (1L << (thrown_spell - RF6_SPELL_START));
if (r_ptr->r_cast_spell < MAX_UCHAR) r_ptr->r_cast_spell++;
}
}
/* Always take note of monsters that kill you */
if (p_ptr->is_dead && (r_ptr->r_deaths < MAX_SHORT) && !p_ptr->inside_arena)
{
r_ptr->r_deaths++; /* Ignore appearance difference */
}
/* A spell was cast */
return TRUE;
}