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SpellCaster.cpp
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SpellCaster.cpp
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/*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "SpellCaster.h"
#include "DynamicObject.h"
#include "GameObject.h"
#include "Totem.h"
#include "CreatureAI.h"
#include "Chat.h"
#include "Spell.h"
#include "SpellAuras.h"
#include "World.h"
#include "WorldPacket.h"
#include "Opcodes.h"
Unit* SpellCaster::SelectMagnetTarget(Unit* victim, Spell* spell, SpellEffectIndex eff)
{
if (!victim)
return nullptr;
SpellEntry const* pProto = spell->m_spellInfo;
if (!pProto) return nullptr;
// Example spell: Cause Insanity (Hakkar)
if (pProto->AttributesEx & SPELL_ATTR_EX_NO_REDIRECTION)
return victim;
// Magic case
if (pProto->AttributesEx3 & SPELL_ATTR_EX3_SUPPRESS_TARGET_PROCS)
return victim;
if ((pProto->DmgClass == SPELL_DAMAGE_CLASS_MAGIC || pProto->SpellVisual == 7250) && pProto->Dispel != DISPEL_POISON && !(pProto->Attributes & SPELL_ATTR_IS_ABILITY))
{
Unit::AuraList const& magnetAuras = victim->GetAurasByType(SPELL_AURA_SPELL_MAGNET);
for (const auto magnetAura : magnetAuras)
{
if (Unit* magnet = magnetAura->GetCaster())
{
if (magnet->IsAlive() && magnet->IsInMap(this) && spell->CheckTarget(magnet, eff))
{
if (SpellAuraHolder* holder = magnetAura->GetHolder())
if (holder->DropAuraCharge())
{
magnet->RemoveAurasDueToSpell(holder->GetId()); // Remove from grounding totem also
victim->RemoveSpellAuraHolder(holder);
}
return magnet;
}
}
}
}
return victim;
}
uint32 SpellCaster::GetLevelForTarget(SpellCaster const* target) const
{
// Bosses are 3 levels higher than players.
if (Creature const* pCreature = ToCreature())
{
if (!pCreature->IsWorldBoss() || !target || !target->IsUnit())
return pCreature->GetLevel();
uint32 level = static_cast<Unit const*>(target)->GetLevel() + sWorld.getConfig(CONFIG_UINT32_WORLD_BOSS_LEVEL_DIFF);
if (level < 1)
return 1;
if (level > 255)
return 255;
return level;
}
if (Unit const* pUnit = ToUnit())
return pUnit->GetLevel();
if (GameObject const* pGo = ToGameObject())
{
uint32 level = 0;
switch (pGo->GetGOInfo()->type)
{
case GAMEOBJECT_TYPE_CHEST:
level = pGo->GetGOInfo()->chest.level;
break;
case GAMEOBJECT_TYPE_TRAP:
level = pGo->GetGOInfo()->trap.level;
break;
}
if (!level)
level = pGo->GetUInt32Value(GAMEOBJECT_LEVEL);
if (level)
return level;
}
if (Unit const* pUnit = ::ToUnit(target))
return pUnit->GetLevel();
return PLAYER_MAX_LEVEL;
}
uint32 SpellCaster::GetWeaponSkillValue(WeaponAttackType attType, SpellCaster const* target) const
{
if (Player const* pPlayer = ToPlayer())
{
Item* item = pPlayer->GetWeaponForAttack(attType, true, true);
// feral or unarmed skill only for base attack
if (attType != BASE_ATTACK && !item)
return 0;
if (pPlayer->IsNoWeaponShapeShift())
return GetSkillMaxForLevel(); // always maximized SKILL_FERAL_COMBAT in fact
// weapon skill or (unarmed for base attack)
uint32 skill = item ? item->GetProto()->GetProficiencySkill() : SKILL_UNARMED;
// Daemon: pas en preBC !
// // in PvP use full skill instead current skill value
// value = (target && target->GetTypeId() == TYPEID_PLAYER)
// ? ((Player*)this)->GetSkillMax(skill)
// : ((Player*)this)->GetSkillValue(skill);
return pPlayer->GetSkillValue(skill);
}
return GetUnitMeleeSkill(target);
}
uint32 SpellCaster::GetDefenseSkillValue(SpellCaster const* target) const
{
if (Player const* pPlayer = ToPlayer())
{
// in PvP use full skill instead current skill value
uint32 value = (target && target->IsPlayer())
? pPlayer->GetSkillMax(SKILL_DEFENSE)
: pPlayer->GetSkillValue(SKILL_DEFENSE);
return value;
}
return GetUnitMeleeSkill(target);
}
// Calculate spell hit result can be:
// Every spell can: Evade/Immune/Reflect/Sucesful hit
// For melee based spells:
// Miss
// Dodge
// Parry
// For spells
// Resist
SpellMissInfo SpellCaster::SpellHitResult(Unit* pVictim, SpellEntry const* spell, SpellEffectIndex effIndex, bool CanReflect, Spell* spellPtr)
{
// Return evade for units in evade mode
if (pVictim->GetTypeId() == TYPEID_UNIT && ((Creature*)pVictim)->IsInEvadeMode())
return SPELL_MISS_EVADE;
// Check for immune (use charges)
if (pVictim != this && !spell->HasAttribute(SPELL_ATTR_NO_IMMUNITIES) &&
pVictim->IsImmuneToSpell(spell, pVictim == this))
return SPELL_MISS_IMMUNE;
// All positive spells can`t miss
// TODO: client not show miss log for this spells - so need find info for this in dbc and use it!
if (spell->IsPositiveSpell(this, pVictim) || spell->IsPositiveEffect(effIndex, this, pVictim))
return SPELL_MISS_NONE;
// Check for immune (use charges)
SpellSchoolMask schoolMask;
if (spellPtr)
schoolMask = spellPtr->m_spellSchoolMask;
else
schoolMask = spell->GetSpellSchoolMask();
if (pVictim != this && pVictim->IsImmuneToDamage(schoolMask, spell))
return SPELL_MISS_IMMUNE;
// Try victim reflect spell
if (CanReflect)
{
int32 reflectchance = pVictim->GetTotalAuraModifier(SPELL_AURA_REFLECT_SPELLS);
Unit::AuraList const& mReflectSpellsSchool = pVictim->GetAurasByType(SPELL_AURA_REFLECT_SPELLS_SCHOOL);
for (const auto i : mReflectSpellsSchool)
if (i->GetModifier()->m_miscvalue & spell->GetSpellSchoolMask())
reflectchance += i->GetModifier()->m_amount;
if (reflectchance > 0 && roll_chance_i(reflectchance))
{
// Start triggers for remove charges if need (trigger only for victim, and mark as active spell)
ProcDamageAndSpell(ProcSystemArguments(pVictim, PROC_FLAG_NONE, PROC_FLAG_TAKE_HARMFUL_SPELL, PROC_EX_REFLECT, 1, BASE_ATTACK, spell));
return SPELL_MISS_REFLECT;
}
}
switch (spell->DmgClass)
{
case SPELL_DAMAGE_CLASS_NONE:
return SPELL_MISS_NONE;
case SPELL_DAMAGE_CLASS_MAGIC:
return MagicSpellHitResult(pVictim, spell, spellPtr);
case SPELL_DAMAGE_CLASS_MELEE:
case SPELL_DAMAGE_CLASS_RANGED:
return MeleeSpellHitResult(pVictim, spell, spellPtr);
}
return SPELL_MISS_NONE;
}
ProcSystemArguments::ProcSystemArguments(Unit* pVictim_, uint32 procFlagsAttacker_, uint32 procFlagsVictim_, uint32 procExtra_, uint32 amount_, WeaponAttackType attType_,
SpellEntry const* procSpell_, Spell const* spell)
: pVictim(pVictim_), procFlagsAttacker(procFlagsAttacker_), procFlagsVictim(procFlagsVictim_), procExtra(procExtra_), amount(amount_),
attType(attType_), procSpell(procSpell_), isSpellTriggeredByAuraOrItem(spell && (spell->IsTriggeredByAura() || spell->IsTriggered() && spell->IsCastByItem())), procTime(sWorld.GetGameTime())
{
if (spell)
appliedSpellModifiers = spell->m_appliedMods;
if (pVictim_)
victimGuid = pVictim_->GetObjectGuid();
}
void SpellCaster::UpdatePendingProcs(uint32 diff)
{
if (sWorld.getConfig(CONFIG_UINT32_SPELL_PROC_DELAY) && IsInWorld())
{
if (m_procsUpdateTimer < diff)
{
m_procsUpdateTimer = sWorld.getConfig(CONFIG_UINT32_SPELL_PROC_DELAY);
if (!m_pendingProcChecks.empty())
{
std::vector<ProcSystemArguments> procData = std::move(m_pendingProcChecks);
m_pendingProcChecks.clear();
for (auto& proc : procData)
ProcDamageAndSpell_delayed(proc);
}
}
else
m_procsUpdateTimer -= diff;
}
}
void SpellCaster::ProcDamageAndSpell(ProcSystemArguments&& data)
{
if ((data.pVictim && !IsInMap(data.pVictim)) || !IsInWorld())
return;
if (!(data.procExtra & PROC_EX_CAST_END))
{
if (data.procFlagsAttacker)
if (Unit* pUnit = ToUnit())
pUnit->ProcSkillsAndReactives(false, data.pVictim, data.procFlagsAttacker, data.procExtra, data.attType, data.procSpell);
if (data.procFlagsVictim && data.pVictim && data.pVictim->IsAlive())
data.pVictim->ProcSkillsAndReactives(true, IsUnit() ? static_cast<Unit*>(this) : data.pVictim, data.procFlagsVictim, data.procExtra, data.attType, data.procSpell);
}
// Always execute On Kill procs instantly. Fixes Improved Drain Soul talent.
if (!sWorld.getConfig(CONFIG_UINT32_SPELL_PROC_DELAY) || (data.procFlagsAttacker & PROC_FLAG_KILL))
ProcDamageAndSpell_real(data, PROC_PROCESS_ALL);
else
{
ProcDamageAndSpell_real(data, PROC_PROCESS_INSTANT);
m_pendingProcChecks.emplace_back(std::move(data));
}
}
void SpellCaster::ProcDamageAndSpell_delayed(ProcSystemArguments& data)
{
if (data.pVictim)
{
data.pVictim = GetMap()->GetUnit(data.victimGuid);
if (!data.pVictim)
return;
}
ProcDamageAndSpell_real(data, PROC_PROCESS_DELAYED);
}
void SpellCaster::ProcDamageAndSpell_real(ProcSystemArguments& data, ProcessProcsAuraType processAurasType)
{
ProcTriggeredList procTriggered;
// Not much to do if no flags are set.
if (data.procFlagsAttacker)
if (Unit* pUnit = ToUnit())
pUnit->ProcDamageAndSpellFor(false, data.pVictim, data, procTriggered, processAurasType);
// There are no auras with the SPELL_ATTR_EX3_INSTANT_TARGET_PROCS for victims
if (processAurasType != PROC_PROCESS_INSTANT &&
// Now go on with a victim's events'n'auras
// Not much to do if no flags are set or there is no victim
data.pVictim && data.pVictim->IsAlive() && data.procFlagsVictim)
{
data.pVictim->ProcDamageAndSpellFor(true, IsUnit() ? static_cast<Unit*>(this) : data.pVictim, data, procTriggered, processAurasType);
// Standing up on damage taken must happen after proc checks.
if (Player* pVictimPlayer = data.pVictim->ToPlayer())
if (pVictimPlayer->IsStandUpScheduled())
pVictimPlayer->SetStandState(UNIT_STAND_STATE_STAND);
}
if (Unit* pUnit = ToUnit())
pUnit->HandleTriggers(data.pVictim, data.procExtra, data.amount, data.procSpell, procTriggered);
}
// Melee based spells can be miss, parry or dodge on this step
// Crit or block - determined on damage calculation phase! (and can be both in some time)
float SpellCaster::MeleeSpellMissChance(Unit* pVictim, WeaponAttackType attType, int32 skillDiff, SpellEntry const* spell, Spell* spellPtr)
{
if (!pVictim || !pVictim->IsStandingUp())
return 0.0f;
// Calculate hit chance (more correct for chance mod)
float hitChance = 0.0f;
float missChance = 0.0f;
// PvP - PvE melee chances
if (pVictim->GetTypeId() == TYPEID_PLAYER)
missChance = 5.0f - skillDiff * 0.04f;
else if (skillDiff < -10)
missChance = 5.0f - skillDiff * 0.2f;
else
missChance = 5.0f - skillDiff * 0.1f;
// Low level reduction
if (!pVictim->IsPlayer() && pVictim->GetLevel() < 10)
missChance *= pVictim->GetLevel() / 10.0f;
if (Unit* pUnit = ToUnit())
{
// Spellmod from SPELLMOD_RESIST_MISS_CHANCE
if (Player* modOwner = pUnit->GetSpellModOwner())
modOwner->ApplySpellMod(spell->Id, SPELLMOD_RESIST_MISS_CHANCE, hitChance, spellPtr);
// Bonuses from attacker aura and ratings
if (attType == RANGED_ATTACK)
hitChance += pUnit->m_modRangedHitChance;
else
hitChance += pUnit->m_modMeleeHitChance;
}
// There is some code in 1.12 that explicitly adds a modifier that causes the first 1% of +hit gained from
// talents or gear to be ignored against monsters with more than 10 Defense Skill above the attacking players Weapon Skill.
// https://us.forums.blizzard.com/en/wow/t/bug-hit-tables/185675/33
if (skillDiff < -10 && hitChance > 0)
hitChance -= 1.0f;
// Hit chance depends from victim auras
if (attType == RANGED_ATTACK)
hitChance += pVictim->GetTotalAuraModifier(SPELL_AURA_MOD_ATTACKER_RANGED_HIT_CHANCE);
else
hitChance += pVictim->GetTotalAuraModifier(SPELL_AURA_MOD_ATTACKER_MELEE_HIT_CHANCE);
missChance -= hitChance;
// Limit miss chance from 0 to 60%
if (missChance < 0.0f)
return 0.0f;
if (missChance > 60.0f)
return 60.0f;
return missChance;
}
// Melee based spells hit result calculations
SpellMissInfo SpellCaster::MeleeSpellHitResult(Unit* pVictim, SpellEntry const* spell, Spell* spellPtr)
{
WeaponAttackType attType = spell->DmgClass == SPELL_DAMAGE_CLASS_RANGED ? RANGED_ATTACK : BASE_ATTACK;
// Warrior spell Execute (5308) should never dodge, miss, resist ... Only the trigger can (20647)
if (spell->IsFitToFamily<SPELLFAMILY_WARRIOR, CF_WARRIOR_EXECUTE>() && spell->Id != 20647)
return SPELL_MISS_NONE;
// Hammer of Wrath should not use weapon skill, but Bloodthirst should.
// bonus from skills is 0.04% per skill Diff
int32 attackerWeaponSkill = (spell->rangeIndex == SPELL_RANGE_IDX_COMBAT || spell->EquippedItemClass == ITEM_CLASS_WEAPON) ?
int32(GetWeaponSkillValue(attType, pVictim)) : GetSkillMaxForLevel();
int32 skillDiff = attackerWeaponSkill - int32(pVictim->GetSkillMaxForLevel(this));
int32 fullSkillDiff = attackerWeaponSkill - int32(pVictim->GetDefenseSkillValue(this));
int32 minWeaponSkill = GetSkillMaxForLevel(pVictim) < attackerWeaponSkill ? GetSkillMaxForLevel(pVictim) : attackerWeaponSkill;
int32 cappedSkillDiff = minWeaponSkill - pVictim->GetSkillMaxForLevel(this);
uint32 roll = urand(0, 9999);
uint32 missChance = uint32(MeleeSpellMissChance(pVictim, attType, fullSkillDiff, spell, spellPtr) * 100.0f);
// Roll miss
uint32 tmp = spell->AttributesEx3 & SPELL_ATTR_EX3_ALWAYS_HIT ? 0 : missChance;
if (roll < tmp)
return SPELL_MISS_MISS;
// Chance resist mechanic for spell (effect resistance handled later)
int32 resist_mech = 0;
if (spell->Mechanic)
resist_mech = pVictim->GetTotalAuraModifierByMiscValue(SPELL_AURA_MOD_MECHANIC_RESISTANCE, spell->Mechanic) * 100;
// Roll chance
tmp += resist_mech;
if (roll < tmp)
return SPELL_MISS_RESIST;
bool canDodge = true;
bool canParry = true;
bool canBlock = spell->HasAttribute(SPELL_ATTR_EX3_COMPLETELY_BLOCKED);
// Same spells cannot be parry/dodge
if (spell->Attributes & SPELL_ATTR_NO_ACTIVE_DEFENSE)
return SPELL_MISS_NONE;
// Ranged attack cannot be parry/dodge
if (attType == RANGED_ATTACK)
return SPELL_MISS_NONE;
bool from_behind = !pVictim->HasInArc(this, M_PI_F);
// Check for attack from behind
if (from_behind)
{
// Can`t dodge from behind in PvP (but its possible in PvE)
if (GetTypeId() == TYPEID_PLAYER && pVictim->GetTypeId() == TYPEID_PLAYER)
canDodge = false;
// Can`t parry or block
canParry = false;
canBlock = false;
}
// Check creatures flags_extra for disable parry
if (Creature* pCreatureVictim = pVictim->ToCreature())
{
if (pCreatureVictim->HasExtraFlag(CREATURE_FLAG_EXTRA_NO_PARRY))
canParry = false;
if (pCreatureVictim->HasExtraFlag(CREATURE_FLAG_EXTRA_NO_BLOCK))
canBlock = false;
}
// Check if the player can parry
else
{
if (!((Player*)pVictim)->CanParry())
canParry = false;
if (!((Player*)pVictim)->CanBlock())
canBlock = false;
}
if (canDodge)
{
// Roll dodge
int32 dodgeModifier = pVictim->IsPlayer() ? skillDiff * 4 : skillDiff * 10;
int32 dodgeChance = int32(pVictim->GetUnitDodgeChance() * 100.0f) - dodgeModifier;
if (dodgeChance < 0)
dodgeChance = 0;
// Low level reduction
if (!pVictim->IsPlayer() && pVictim->GetLevel() < 10)
dodgeChance *= pVictim->GetLevel() / 10.0f;
tmp += dodgeChance;
if (roll < tmp)
return SPELL_MISS_DODGE;
}
if (canParry)
{
// Roll parry
int32 parryModifier = pVictim->IsPlayer() ? skillDiff * 4 : cappedSkillDiff < -10 ? 60 * cappedSkillDiff : 20 * cappedSkillDiff;
int32 parryChance = int32(pVictim->GetUnitParryChance() * 100.0f) - parryModifier;
// Can`t parry from behind
if (parryChance < 0)
parryChance = 0;
// Low level reduction
if (!pVictim->IsPlayer() && pVictim->GetLevel() < 10)
parryChance *= pVictim->GetLevel() / 10.0f;
tmp += parryChance;
if (roll < tmp)
return SPELL_MISS_PARRY;
}
// There are 2 types of ability blocks: partial and full
// Fully blockable spells have a specific attribute, which generates a miss instead of a partial block
// Spells with an attribute must be rolled for block once on spell hit die
// Spells without an attribute must be rolled for partial block only inside damage calculation
if (canBlock && pVictim->RollSpellBlockChanceOutcome(this, attType))
return SPELL_MISS_BLOCK;
return SPELL_MISS_NONE;
}
SpellMissInfo SpellCaster::MagicSpellHitResult(Unit* pVictim, SpellEntry const* spell, Spell* spellPtr)
{
// Can`t miss on dead target (on skinning for example)
if (!pVictim->IsAlive())
return SPELL_MISS_NONE;
// Spell cannot be resisted (not exist on dbc, custom flag)
if (spell->AttributesEx4 & SPELL_ATTR_EX4_IGNORE_RESISTANCES)
return SPELL_MISS_NONE;
int32 hitChance = MagicSpellHitChance(pVictim, spell, spellPtr);
int32 missChance = 10000 - hitChance;
int32 rand = irand(0, 10000);
if (rand < missChance)
return SPELL_MISS_RESIST;
return SPELL_MISS_NONE;
}
int32 SpellCaster::MagicSpellHitChance(Unit* pVictim, SpellEntry const* spell, Spell* spellPtr)
{
if (spell->AttributesEx3 & SPELL_ATTR_EX3_ALWAYS_HIT)
return 10000;
SpellSchoolMask schoolMask = spell->GetSpellSchoolMask();
// PvP - PvE spell misschances per leveldif > 2
int32 lchance = pVictim->GetTypeId() == TYPEID_PLAYER ? 7 : 11;
int32 leveldif = int32(pVictim->GetLevelForTarget(this)) - int32(GetLevelForTarget(pVictim));
// Base hit chance from attacker and victim levels
float modHitChance;
if (leveldif < 3)
modHitChance = 96 - leveldif;
else
modHitChance = 94 - (leveldif - 2) * lchance;
// Spellmod from SPELLMOD_RESIST_MISS_CHANCE
if (Unit* pUnit = ToUnit())
{
if (Player* modOwner = pUnit->GetSpellModOwner())
{
modOwner->ApplySpellMod(spell->Id, SPELLMOD_RESIST_MISS_CHANCE, modHitChance, spellPtr);
}
}
// Chance hit from victim SPELL_AURA_MOD_ATTACKER_SPELL_HIT_CHANCE auras
modHitChance += pVictim->GetTotalAuraModifierByMiscMask(SPELL_AURA_MOD_ATTACKER_SPELL_HIT_CHANCE, schoolMask);
// Reduce spell hit chance for Area of effect spells from victim SPELL_AURA_MOD_AOE_AVOIDANCE aura
if (spell->IsAreaOfEffectSpell())
{
modHitChance -= pVictim->GetTotalAuraModifier(SPELL_AURA_MOD_AOE_AVOIDANCE);
}
// Chance resist mechanic for spell (effect resistance handled later)
int32 resist_mech = 0;
if (spell->Mechanic)
resist_mech = pVictim->GetTotalAuraModifierByMiscValue(SPELL_AURA_MOD_MECHANIC_RESISTANCE, spell->Mechanic);
// Apply mod
modHitChance -= resist_mech;
// Chance resist debuff
modHitChance -= pVictim->GetTotalAuraModifierByMiscValue(SPELL_AURA_MOD_DEBUFF_RESISTANCE, int32(spell->Dispel));
// Increase hit chance from attacker SPELL_AURA_MOD_SPELL_HIT_CHANCE and attacker ratings
if (Unit* pUnit = ToUnit())
modHitChance += int32(pUnit->m_modSpellHitChance);
// Nostalrius: sorts binaires.
if (spell->IsBinary())
{
// Get base victim resistance for school
float resistModHitChance = GetSpellResistChance(pVictim, schoolMask, false);
modHitChance *= (1 - resistModHitChance);
}
int32 HitChance = modHitChance * 100;
if (HitChance < 100) HitChance = 100;
if (HitChance > 9900) HitChance = 9900;
return HitChance;
}
float SpellCaster::GetSpellResistChance(Unit const* victim, uint32 schoolMask, bool innateResists) const
{
Unit const* pUnit = ToUnit();
// Get base victim resistance for school
float const baseResistance = victim->GetResistance(GetFirstSchoolInMask(SpellSchoolMask(schoolMask)));
// Get attacker spell penetration from SPELL_AURA_MOD_TARGET_RESISTANCE aura
float const selfResistance = pUnit ? pUnit->GetTotalAuraModifierByMiscMask(SPELL_AURA_MOD_TARGET_RESISTANCE, schoolMask) : 0;
float resistModHitChance = baseResistance + selfResistance;
#if SUPPORTED_CLIENT_BUILD > CLIENT_BUILD_1_8_4
if ((resistModHitChance < 0.0f) && (baseResistance >= 0.0f))
resistModHitChance = 0.0f;
#endif
// Magic vulnerability calculation
if (resistModHitChance < 0.0f)
{
// Victim's level based skill, penalize when calculating for low levels (< 20):
float const skill = std::max(GetSkillMaxForLevel(victim), uint16(100));
// Convert resistance value to vulnerability percentage through comparision with skill
resistModHitChance = (float(resistModHitChance) / skill);
if (resistModHitChance < -0.75f)
resistModHitChance = -0.75f;
return resistModHitChance;
}
uint32 const uiLevel = GetLevel();
// Computing innate resists, resistance bonus when attacking a creature higher level. Not affected by modifiers.
if (innateResists && victim->GetTypeId() == TYPEID_UNIT)
{
int32 leveldiff = int32(victim->GetLevelForTarget(this)) - int32(GetLevelForTarget(victim));
resistModHitChance += int32((8.0f * leveldiff) * uiLevel / 63.0f);
}
resistModHitChance *= (float)(0.15f / uiLevel);
if (resistModHitChance < 0.0f)
resistModHitChance = 0.0f;
if (resistModHitChance > 0.75f)
resistModHitChance = 0.75f;
return resistModHitChance;
}
void SpellCaster::SendSpellMiss(Unit* target, uint32 spellId, SpellMissInfo missInfo) const
{
WorldPacket data(SMSG_SPELLLOGMISS, (4 + 8 + 1 + 4 + 8 + 1));
data << uint32(spellId);
data << GetObjectGuid();
data << uint8(0); // unk8
data << uint32(1); // target count
// for(i = 0; i < target count; ++i)
data << target->GetObjectGuid(); // target GUID
data << uint8(missInfo);
// Nostalrius: + 2 * float if unk8=1
// end loop
SendObjectMessageToSet(&data, true);
}
void SpellCaster::SendSpellDamageResist(Unit* target, uint32 spellId) const
{
WorldPacket data(SMSG_PROCRESIST, 8 + 8 + 4 + 1);
data << GetObjectGuid();
data << target->GetObjectGuid();
data << uint32(spellId);
data << uint8(0); // bool - log format: 0-default, 1-debug
SendMessageToSet(&data, true);
}
void SpellCaster::SendSpellOrDamageImmune(Unit* target, uint32 spellId) const
{
WorldPacket data(SMSG_SPELLORDAMAGE_IMMUNE, (8 + 8 + 4 + 1));
data << GetObjectGuid();
data << target->GetObjectGuid();
data << uint32(spellId);
data << uint8(0);
SendMessageToSet(&data, true);
}
uint32 SpellCaster::SpellCriticalDamageBonus(SpellEntry const* spellProto, uint32 damage, Unit* pVictim, Spell* spell)
{
// Calculate critical bonus
int32 crit_bonus;
switch (spellProto->DmgClass)
{
case SPELL_DAMAGE_CLASS_MELEE: // for melee based spells is 100%
case SPELL_DAMAGE_CLASS_RANGED:
crit_bonus = damage;
break;
default:
crit_bonus = damage / 2; // for spells is 50%
break;
}
Unit const* pUnit = ToUnit();
// adds additional damage to crit_bonus (from talents)
if (pUnit)
{
if (Player* modOwner = pUnit->GetSpellModOwner())
modOwner->ApplySpellMod(spellProto->Id, SPELLMOD_CRIT_DAMAGE_BONUS, crit_bonus, spell);
}
if (!pVictim)
return damage += crit_bonus;
uint32 creatureTypeMask = pVictim->GetCreatureTypeMask();
float critPctDamageMod = pUnit ? pUnit->GetTotalAuraMultiplierByMiscMask(SPELL_AURA_MOD_CRIT_PERCENT_VERSUS, creatureTypeMask) : 1;
damage = (damage + crit_bonus) * critPctDamageMod;
return damage;
}
float SpellCaster::SpellCriticalHealingBonus(SpellEntry const* spellProto, uint32 damage, Unit const* pVictim) const
{
// Calculate critical bonus
float crit_bonus;
switch (spellProto->DmgClass)
{
case SPELL_DAMAGE_CLASS_MELEE: // for melee based spells is 100%
case SPELL_DAMAGE_CLASS_RANGED:
// TODO: write here full calculation for melee/ranged spells
crit_bonus = damage;
break;
default:
crit_bonus = damage / 2; // for spells is 50%
break;
}
if (pVictim)
{
if (Unit const* pUnit = ToUnit())
{
uint32 creatureTypeMask = pVictim->GetCreatureTypeMask();
crit_bonus = crit_bonus * pUnit->GetTotalAuraMultiplierByMiscMask(SPELL_AURA_MOD_CRIT_PERCENT_VERSUS, creatureTypeMask);
}
}
if (crit_bonus > 0)
damage += crit_bonus;
return damage;
}
int32 SpellCaster::DealHeal(Unit* pVictim, uint32 addhealth, SpellEntry const* spellProto, bool critical)
{
Unit* pUnit = ToUnit();
// Script Event HealedBy
if (pVictim->AI() && pUnit)
pVictim->AI()->HealedBy(pUnit, addhealth);
int32 gain = pVictim->ModifyHealth(int32(addhealth));
SpellCaster* pHealer = this;
if (IsCreature() && ((Creature*)this)->IsTotem() && ((Totem*)this)->GetTotemType() != TOTEM_STATUE)
pHealer = pUnit->GetOwner();
if (IsPlayer() || pVictim->IsPlayer())
pHealer->SendHealSpellLog(pVictim, spellProto->Id, addhealth, critical);
return gain;
}
void SpellCaster::SendHealSpellLog(Unit const* pVictim, uint32 SpellID, uint32 Damage, bool critical) const
{
#if SUPPORTED_CLIENT_BUILD > CLIENT_BUILD_1_9_4
// we guess size
WorldPacket data(SMSG_SPELLHEALLOG, (8 + 8 + 4 + 4 + 1));
data << pVictim->GetPackGUID();
data << GetPackGUID();
data << uint32(SpellID);
data << uint32(Damage);
data << uint8(critical ? 1 : 0);
// data << uint8(0); // [-ZERO]
SendMessageToSet(&data, true);
#endif
}
void SpellCaster::EnergizeBySpell(Unit* pVictim, uint32 SpellID, uint32 Damage, Powers powertype)
{
SendEnergizeSpellLog(pVictim, SpellID, Damage, powertype);
// needs to be called after sending spell log
pVictim->ModifyPower(powertype, Damage);
}
void SpellCaster::SendEnergizeSpellLog(Unit const* pVictim, uint32 SpellID, uint32 Damage, Powers powertype) const
{
#if SUPPORTED_CLIENT_BUILD > CLIENT_BUILD_1_9_4
WorldPacket data(SMSG_SPELLENERGIZELOG, (8 + 8 + 4 + 4 + 4 + 1));
data << pVictim->GetPackGUID();
data << GetPackGUID();
data << uint32(SpellID);
data << uint32(powertype);
data << uint32(Damage);
SendMessageToSet(&data, true);
#endif
}
void SpellCaster::SendSpellNonMeleeDamageLog(SpellNonMeleeDamage* log) const
{
WorldPacket data(SMSG_SPELLNONMELEEDAMAGELOG, (16 + 4 + 4 + 1 + 4 + 4 + 1 + 1 + 4 + 4 + 1)); // we guess size
#if SUPPORTED_CLIENT_BUILD > CLIENT_BUILD_1_8_4
data << log->target->GetPackGUID();
data << log->attacker->GetPackGUID();
#else
data << log->target->GetGUID();
data << log->attacker->GetGUID();
#endif
data << uint32(log->SpellID);
data << uint32(log->damage); // damage amount
data << uint8(log->school); // damage school
data << uint32(log->absorb); // AbsorbedDamage
data << int32(log->resist); // resist
data << uint8(log->periodicLog); // if 1, then client show spell name (example: %s's ranged shot hit %s for %u school or %s suffers %u school damage from %s's spell_name
data << uint8(log->unused); // unused
data << uint32(log->blocked); // blocked
data << uint32(log->HitInfo);
data << uint8(0); // flag to use extend data
SendMessageToSet(&data, true);
}
void SpellCaster::SendSpellNonMeleeDamageLog(Unit* target, uint32 spellId, uint32 damage, SpellSchoolMask damageSchoolMask, uint32 absorbedDamage, int32 resist, bool isPeriodic, uint32 blocked, bool criticalHit, bool split)
{
SpellNonMeleeDamage log(this, target, spellId, GetFirstSchoolInMask(damageSchoolMask));
log.damage = damage;
log.damage += (resist < 0 ? uint32(std::abs(resist)) : 0);
log.damage -= (absorbedDamage + (resist > 0 ? uint32(resist) : 0) + blocked);
log.absorb = absorbedDamage;
log.resist = resist;
log.periodicLog = isPeriodic;
log.blocked = blocked;
log.HitInfo = 0;
if (criticalHit)
log.HitInfo |= SPELL_HIT_TYPE_CRIT;
if (split)
log.HitInfo |= SPELL_HIT_TYPE_SPLIT;
SendSpellNonMeleeDamageLog(&log);
}
SpellSchoolMask SpellCaster::GetMeleeDamageSchoolMask() const
{
return SPELL_SCHOOL_MASK_NORMAL;
}
float SpellCaster::CalcArmorReducedDamage(Unit* pVictim, uint32 const damage) const
{
uint32 newdamage = 0;
float armor = (float)pVictim->GetArmor();
Unit const* pUnit = ToUnit();
// Ignore enemy armor by SPELL_AURA_MOD_TARGET_RESISTANCE aura
if (pUnit)
armor += pUnit->GetTotalAuraModifierByMiscMask(SPELL_AURA_MOD_TARGET_RESISTANCE, SPELL_SCHOOL_MASK_NORMAL);
if (armor < 0.0f)
armor = 0.0f;
float tmpvalue = 0.1f * armor / (8.5f * float(GetLevel()) + 40.0f);
tmpvalue = tmpvalue / (1.0f + tmpvalue);
if (tmpvalue < 0.0f)
tmpvalue = 0.0f;
if (tmpvalue > 0.75f)
tmpvalue = 0.75f;
newdamage = damage - (damage * tmpvalue);
return (newdamage > 1) ? newdamage : 1;
}
float SpellCaster::CalculateSpellEffectValue(Unit const* target, SpellEntry const* spellProto, SpellEffectIndex effect_index, int32 const* effBasePoints, Spell* spell) const
{
Unit const* pUnit = ToUnit();
Player const* pPlayer = ToPlayer();
uint8 comboPoints = pPlayer ? pPlayer->GetComboPoints() : 0;
int32 level = GetLevel();
if (level > (int32)spellProto->maxLevel && spellProto->maxLevel > 0)
level = (int32)spellProto->maxLevel;
else if (level < (int32)spellProto->baseLevel)
level = (int32)spellProto->baseLevel;
level -= (int32)spellProto->spellLevel;
int32 baseDice = int32(spellProto->EffectBaseDice[effect_index]);
float basePointsPerLevel = spellProto->EffectRealPointsPerLevel[effect_index];
float randomPointsPerLevel = spellProto->EffectDicePerLevel[effect_index];
float value = effBasePoints
? *effBasePoints - baseDice
: spellProto->EffectBasePoints[effect_index];
value += level * basePointsPerLevel;
int32 randomPoints = int32(spellProto->EffectDieSides[effect_index] + level * randomPointsPerLevel);
float comboDamage = spellProto->EffectPointsPerComboPoint[effect_index];
switch (randomPoints)
{
case 0:
case 1:
value += baseDice;
break; // range 1..1
default:
{
// range can have positive (1..rand) and negative (rand..1) values, so order its for irand
int32 randvalue = baseDice >= randomPoints
? irand(randomPoints, baseDice)
: irand(baseDice, randomPoints);
value += randvalue;
break;
}
}
// random damage
if (comboDamage != 0 && pPlayer && target && (target->GetObjectGuid() == pPlayer->GetComboTargetGuid()))
value += comboDamage * comboPoints;
if (pUnit)
{
if (Player* modOwner = pUnit->GetSpellModOwner())
modOwner->ApplySpellMod(spellProto->Id, SPELLMOD_ALL_EFFECTS, value, spell);
}
if (spellProto->HasAttribute(SPELL_ATTR_SCALES_WITH_CREATURE_LEVEL) && spellProto->spellLevel &&
spellProto->Effect[effect_index] != SPELL_EFFECT_WEAPON_PERCENT_DAMAGE &&
spellProto->Effect[effect_index] != SPELL_EFFECT_KNOCK_BACK &&
(spellProto->Effect[effect_index] != SPELL_EFFECT_APPLY_AURA || spellProto->EffectApplyAuraName[effect_index] != SPELL_AURA_MOD_DECREASE_SPEED))
{
CreatureClassLevelStats const* pCLS = sObjectMgr.GetCreatureClassLevelStats(1, GetLevel());
float CLSPowerCreature = pCLS->melee_damage;
CreatureClassLevelStats const* spellCLS = sObjectMgr.GetCreatureClassLevelStats(1, spellProto->spellLevel);
float CLSPowerSpell = spellCLS->melee_damage;
value = value * (CLSPowerCreature / CLSPowerSpell);
}
return value;
}
void SpellCaster::CalculateSpellDamage(SpellNonMeleeDamage* damageInfo, float damage, SpellEntry const* spellInfo, SpellEffectIndex effectIndex, WeaponAttackType attackType, Spell* spell, bool crit)
{
SpellSchoolMask damageSchoolMask = GetSchoolMask(damageInfo->school);
Unit* pVictim = damageInfo->target;
if (!pVictim)
return;
if (damage < 0)
return;
if (!pVictim->IsAlive())
return;
// damage bonus (per damage class)
switch (spellInfo->DmgClass)
{
// Melee and Ranged Spells
case SPELL_DAMAGE_CLASS_RANGED:
case SPELL_DAMAGE_CLASS_MELEE:
{
//Calculate damage bonus
damage = MeleeDamageBonusDone(pVictim, damage, attackType, spellInfo, effectIndex, SPELL_DIRECT_DAMAGE, 1, spell);
damage = pVictim->MeleeDamageBonusTaken(this, damage, attackType, spellInfo, effectIndex, SPELL_DIRECT_DAMAGE, 1, spell);
// if crit add critical bonus
if (crit && !spellInfo->HasAttribute(SPELL_ATTR_EX3_IGNORE_CASTER_MODIFIERS))
{
damageInfo->HitInfo |= SPELL_HIT_TYPE_CRIT;
damage = SpellCriticalDamageBonus(spellInfo, damage, pVictim, spell);
}
break;
}
// Magical Attacks
case SPELL_DAMAGE_CLASS_NONE:
case SPELL_DAMAGE_CLASS_MAGIC:
{
// Calculate damage bonus
damage = SpellDamageBonusDone(pVictim, spellInfo, effectIndex, damage, SPELL_DIRECT_DAMAGE, 1, spell);
damage = pVictim->SpellDamageBonusTaken(this, spellInfo, effectIndex, damage, SPELL_DIRECT_DAMAGE, 1, spell);
// If crit add critical bonus
if (crit && !spellInfo->HasAttribute(SPELL_ATTR_EX3_IGNORE_CASTER_MODIFIERS))
{
damageInfo->HitInfo |= SPELL_HIT_TYPE_CRIT;
damage = SpellCriticalDamageBonus(spellInfo, damage, pVictim, spell);
}
break;
}
}
// damage mitigation
if (damage > 0)
{
// physical damage => armor
if (damageSchoolMask & SPELL_SCHOOL_MASK_NORMAL && !(spellInfo->Custom & SPELL_CUSTOM_IGNORE_ARMOR))
damage = CalcArmorReducedDamage(pVictim, damage);
}
else
damage = 0;
damageInfo->damage = ditheru(damage);
}
/**
* Calculates caster part of melee damage bonuses,
* also includes different bonuses dependent from target auras
*/
float SpellCaster::MeleeDamageBonusDone(Unit* pVictim, float pdamage, WeaponAttackType attType, SpellEntry const* spellProto, SpellEffectIndex effectIndex, DamageEffectType damagetype, uint32 stack, Spell* spell, bool flat)
{
if (!pVictim || pdamage == 0)
return pdamage;
// Some spells don't benefit from done mods
if (spellProto && spellProto->HasAttribute(SPELL_ATTR_EX3_IGNORE_CASTER_MODIFIERS))
return pdamage;
// differentiate for weapon damage based spells
bool isWeaponDamageBasedSpell = !(spellProto && (damagetype == DOT || spellProto->HasEffect(SPELL_EFFECT_SCHOOL_DAMAGE)));
Item* pWeapon = GetTypeId() == TYPEID_PLAYER ? ((Player*)this)->GetWeaponForAttack(attType, true, false) : nullptr;