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+/*
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+ * DamageCalculator.cpp, part of VCMI engine
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+ *
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+ * Authors: listed in file AUTHORS in main folder
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+ *
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+ * License: GNU General Public License v2.0 or later
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+ * Full text of license available in license.txt file, in main folder
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+ *
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+ */
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+
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+#include "StdInc.h"
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+#include "DamageCalculator.h"
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+#include "CBattleInfoCallback.h"
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+#include "Unit.h"
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+
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+#include "../HeroBonus.h"
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+#include "../mapObjects/CGTownInstance.h"
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+#include "../spells/CSpellHandler.h"
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+#include "../CModHandler.h"
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+
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+namespace SiegeStuffThatShouldBeMovedToHandlers // <=== TODO
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+{
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+
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+static void retrieveTurretDamageRange(const CGTownInstance * town, const battle::Unit * turret, double & outMinDmg, double & outMaxDmg)
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+{
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+ // http://heroes.thelazy.net/wiki/Arrow_tower
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+ assert(turret->creatureIndex() == CreatureID::ARROW_TOWERS);
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+ assert(town);
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+ assert(turret->getPosition() >= -4 && turret->getPosition() <= -2);
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+
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+ // base damage, irregardless of town level
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+ static const int baseDamageKeep = 10;
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+ static const int baseDamageTower = 6;
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+
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+ // extra damage, for each building in town
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+ static const int extraDamage = 2;
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+
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+ const int townLevel = town->getTownLevel();
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+
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+ int minDamage;
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+
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+ if (turret->getPosition() == BattleHex::CASTLE_CENTRAL_TOWER)
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+ minDamage = baseDamageKeep + townLevel * extraDamage;
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+ else
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+ minDamage = baseDamageTower + townLevel / 2 * extraDamage;
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+
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+ outMinDmg = minDamage;
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+ outMaxDmg = minDamage * 2;
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+}
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+
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+}
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+
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+TDmgRange DamageCalculator::getBaseDamageSingle() const
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+{
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+ double minDmg = 0.0;
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+ double maxDmg = 0.0;
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+
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+ minDmg = info.attacker->getMinDamage(info.shooting);
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+ maxDmg = info.attacker->getMaxDamage(info.shooting);
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+
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+ if(info.attacker->creatureIndex() == CreatureID::ARROW_TOWERS)
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+ SiegeStuffThatShouldBeMovedToHandlers::retrieveTurretDamageRange(callback.battleGetDefendedTown(), info.attacker, minDmg, maxDmg);
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+
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+ const std::string cachingStrSiedgeWeapon = "type_SIEGE_WEAPON";
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+ static const auto selectorSiedgeWeapon = Selector::type()(Bonus::SIEGE_WEAPON);
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+
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+ if(info.attacker->hasBonus(selectorSiedgeWeapon, cachingStrSiedgeWeapon) && info.attacker->creatureIndex() != CreatureID::ARROW_TOWERS) //any siege weapon, but only ballista can attack (second condition - not arrow turret)
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+ { //minDmg and maxDmg are multiplied by hero attack + 1
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+ auto retrieveHeroPrimSkill = [&](int skill) -> int
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+ {
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+ std::shared_ptr<const Bonus> b = info.attacker->getBonus(Selector::sourceTypeSel(Bonus::HERO_BASE_SKILL).And(Selector::typeSubtype(Bonus::PRIMARY_SKILL, skill)));
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+ return b ? b->val : 0; //if there is no hero or no info on his primary skill, return 0
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+ };
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+
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+ minDmg *= retrieveHeroPrimSkill(PrimarySkill::ATTACK) + 1;
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+ maxDmg *= retrieveHeroPrimSkill(PrimarySkill::ATTACK) + 1;
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+ }
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+ return { minDmg, maxDmg };
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+}
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+
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+TDmgRange DamageCalculator::getBaseDamageBlessCurse() const
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+{
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+ const std::string cachingStrForcedMinDamage = "type_ALWAYS_MINIMUM_DAMAGE";
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+ static const auto selectorForcedMinDamage = Selector::type()(Bonus::ALWAYS_MINIMUM_DAMAGE);
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+
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+ const std::string cachingStrForcedMaxDamage = "type_ALWAYS_MAXIMUM_DAMAGE";
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+ static const auto selectorForcedMaxDamage = Selector::type()(Bonus::ALWAYS_MAXIMUM_DAMAGE);
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+
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+ TConstBonusListPtr curseEffects = info.attacker->getBonuses(selectorForcedMinDamage, cachingStrForcedMinDamage);
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+ TConstBonusListPtr blessEffects = info.attacker->getBonuses(selectorForcedMaxDamage, cachingStrForcedMaxDamage);
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+
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+ int curseBlessAdditiveModifier = blessEffects->totalValue() - curseEffects->totalValue();
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+
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+ TDmgRange baseDamage = getBaseDamageSingle();
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+ TDmgRange modifiedDamage = {
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+ std::max( int64_t(1), baseDamage.first + curseBlessAdditiveModifier),
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+ std::max( int64_t(1), baseDamage.second + curseBlessAdditiveModifier)
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+ };
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+
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+ if ( curseEffects->size() && blessEffects->size() )
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+ {
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+ logGlobal->warn("Stack has both curse and bless! Effects will negate each other!");
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+ return modifiedDamage;
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+ }
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+
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+ if(curseEffects->size())
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+ {
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+ return {
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+ modifiedDamage.first,
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+ modifiedDamage.first
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+ };
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+ }
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+
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+ if(blessEffects->size())
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+ {
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+ return {
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+ modifiedDamage.second,
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+ modifiedDamage.second
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+ };
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+ }
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+
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+ return modifiedDamage;
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+}
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+
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+TDmgRange DamageCalculator::getBaseDamageStack() const
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+{
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+ auto stackSize = info.attacker->getCount();
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+ auto baseDamage = getBaseDamageBlessCurse();
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+ return {
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+ baseDamage.first * stackSize,
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+ baseDamage.second * stackSize
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+ };
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+}
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+
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+int DamageCalculator::getActorAttackBase() const
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+{
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+ return info.attacker->getAttack(info.shooting);
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+}
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+
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+int DamageCalculator::getActorAttackEffective() const
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+{
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+ return getActorAttackBase() + getActorAttackSlayer();
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+}
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+
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+int DamageCalculator::getActorAttackSlayer() const
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+{
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+ const std::string cachingStrSlayer = "type_SLAYER";
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+ static const auto selectorSlayer = Selector::type()(Bonus::SLAYER);
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+
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+ auto slayerEffects = info.attacker->getBonuses(selectorSlayer, cachingStrSlayer);
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+
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+ if(std::shared_ptr<const Bonus> slayerEffect = slayerEffects->getFirst(Selector::all))
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+ {
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+ std::vector<int32_t> affectedIds;
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+ const auto spLevel = slayerEffect->val;
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+ const CCreature * defenderType = info.defender->unitType();
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+ bool isAffected = false;
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+
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+ for(const auto & b : defenderType->getBonusList())
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+ {
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+ if((b->type == Bonus::KING3 && spLevel >= 3) || //expert
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+ (b->type == Bonus::KING2 && spLevel >= 2) || //adv +
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+ (b->type == Bonus::KING1 && spLevel >= 0)) //none or basic +
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+ {
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+ isAffected = true;
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+ break;
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+ }
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+ }
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+
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+ if(isAffected)
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+ {
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+ int attackBonus = SpellID(SpellID::SLAYER).toSpell()->getLevelPower(spLevel);
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+ if(info.attacker->hasBonusOfType(Bonus::SPECIAL_PECULIAR_ENCHANT, SpellID::SLAYER))
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+ {
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+ ui8 attackerTier = info.attacker->unitType()->level;
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+ ui8 specialtyBonus = std::max(5 - attackerTier, 0);
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+ attackBonus += specialtyBonus;
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+ }
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+ return attackBonus;
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+ }
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+ }
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+ return 0;
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+}
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+
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+int DamageCalculator::getTargetDefenseBase() const
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+{
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+ return info.defender->getDefense(info.shooting);
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+}
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+
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+int DamageCalculator::getTargetDefenseEffective() const
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+{
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+ return getTargetDefenseBase() + getTargetDefenseIgnored();
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+}
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+
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+int DamageCalculator::getTargetDefenseIgnored() const
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+{
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+ double multDefenceReduction = battleBonusValue(info.attacker, Selector::type()(Bonus::ENEMY_DEFENCE_REDUCTION)) / 100.0;
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+
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+ if(multDefenceReduction > 0)
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+ {
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+ int reduction = std::floor(multDefenceReduction * getTargetDefenseBase()) + 1;
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+ return -std::min(reduction,getTargetDefenseBase());
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+ }
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+
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+ return 0;
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+}
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+
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+double DamageCalculator::getAttackSkillFactor() const
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+{
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+ int attackAdvantage = getActorAttackEffective() - getTargetDefenseEffective();
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+
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+ if (attackAdvantage > 0)
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+ {
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+ const double attackMultiplier = VLC->modh->settings.ATTACK_POINT_DMG_MULTIPLIER;
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+ const double attackMultiplierCap = VLC->modh->settings.ATTACK_POINTS_DMG_MULTIPLIER_CAP;
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+ const double attackFactor = std::min(attackMultiplier * attackAdvantage, attackMultiplierCap);
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+
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+ return attackFactor;
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+ }
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+ return 0.f;
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+}
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+
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+double DamageCalculator::getAttackBlessFactor() const
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+{
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+ const std::string cachingStrDamage = "type_GENERAL_DAMAGE_PREMY";
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+ static const auto selectorDamage = Selector::type()(Bonus::GENERAL_DAMAGE_PREMY);
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+ return info.attacker->valOfBonuses(selectorDamage, cachingStrDamage) / 100.0;
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+}
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+
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+double DamageCalculator::getAttackOffenseArcheryFactor() const
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+{
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+ if(info.shooting)
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+ {
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+ const std::string cachingStrArchery = "type_SECONDARY_SKILL_PREMYs_ARCHERY";
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+ static const auto selectorArchery = Selector::typeSubtype(Bonus::SECONDARY_SKILL_PREMY, SecondarySkill::ARCHERY);
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+ return info.attacker->valOfBonuses(selectorArchery, cachingStrArchery) / 100.0;
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+ }
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+ else
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+ {
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+ const std::string cachingStrOffence = "type_SECONDARY_SKILL_PREMYs_OFFENCE";
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+ static const auto selectorOffence = Selector::typeSubtype(Bonus::SECONDARY_SKILL_PREMY, SecondarySkill::OFFENCE);
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+ return info.attacker->valOfBonuses(selectorOffence, cachingStrOffence) / 100.0;
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+ }
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+}
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+
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+double DamageCalculator::getAttackLuckFactor() const
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+{
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+ if (info.luckyStrike)
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+ return 1.0;
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+ return 0.0;
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+}
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+
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+double DamageCalculator::getAttackDeathBlowFactor() const
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+{
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+ if (info.deathBlow)
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+ return 1.0;
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+ return 0.0;
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+}
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+
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+double DamageCalculator::getAttackDoubleDamageFactor() const
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+{
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+ if (info.doubleDamage)
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+ return 1.0;
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+ return 0.0;
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+}
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+
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+double DamageCalculator::getAttackJoustingFactor() const
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+{
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+ const std::string cachingStrJousting = "type_JOUSTING";
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+ static const auto selectorJousting = Selector::type()(Bonus::JOUSTING);
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+
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+ const std::string cachingStrChargeImmunity = "type_CHARGE_IMMUNITY";
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+ static const auto selectorChargeImmunity = Selector::type()(Bonus::CHARGE_IMMUNITY);
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+
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+ //applying jousting bonus
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+ if(info.chargeDistance > 0 && info.attacker->hasBonus(selectorJousting, cachingStrJousting) && !info.defender->hasBonus(selectorChargeImmunity, cachingStrChargeImmunity))
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+ return info.chargeDistance * 0.05;
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+ return 0.0;
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+}
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+
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+double DamageCalculator::getAttackHateFactor() const
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+{
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+ //assume that unit have only few HATE features and cache them all
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+ const std::string cachingStrHate = "type_HATE";
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+ static const auto selectorHate = Selector::type()(Bonus::HATE);
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+
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+ auto allHateEffects = info.attacker->getBonuses(selectorHate, cachingStrHate);
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+
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+ return allHateEffects->valOfBonuses(Selector::subtype()(info.defender->creatureIndex())) / 100.0;
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+}
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+
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+double DamageCalculator::getDefenseSkillFactor() const
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+{
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+ int defenseAdvantage = getTargetDefenseEffective() - getActorAttackEffective();
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+
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+ //bonus from attack/defense skills
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+ if(defenseAdvantage > 0) //decreasing dmg
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+ {
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+ const double defenseMultiplier = VLC->modh->settings.DEFENSE_POINT_DMG_MULTIPLIER;
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+ const double defenseMultiplierCap = VLC->modh->settings.DEFENSE_POINTS_DMG_MULTIPLIER_CAP;
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+
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+ const double dec = std::min(defenseMultiplier * defenseAdvantage, defenseMultiplierCap);
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+ return dec;
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+ }
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+ return 0.0;
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+}
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+
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+double DamageCalculator::getDefenseArmorerFactor() const
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+{
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+ const std::string cachingStrArmorer = "type_SECONDARY_SKILL_PREMYs_ARMORER";
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+ static const auto selectorArmorer = Selector::typeSubtype(Bonus::SECONDARY_SKILL_PREMY, SecondarySkill::ARMORER);
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+ return info.defender->valOfBonuses(selectorArmorer, cachingStrArmorer) / 100.0;
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+
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+}
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+
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+double DamageCalculator::getDefenseMagicShieldFactor() const
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+{
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+ const std::string cachingStrMeleeReduction = "type_GENERAL_DAMAGE_REDUCTIONs_0";
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+ static const auto selectorMeleeReduction = Selector::typeSubtype(Bonus::GENERAL_DAMAGE_REDUCTION, 0);
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+
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+ const std::string cachingStrRangedReduction = "type_GENERAL_DAMAGE_REDUCTIONs_1";
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+ static const auto selectorRangedReduction = Selector::typeSubtype(Bonus::GENERAL_DAMAGE_REDUCTION, 1);
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+
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+ //handling spell effects - shield and air shield
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+ if(info.shooting)
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+ return info.defender->valOfBonuses(selectorRangedReduction, cachingStrRangedReduction) / 100.0;
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+ else
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+ return info.defender->valOfBonuses(selectorMeleeReduction, cachingStrMeleeReduction) / 100.0;
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+}
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+
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+double DamageCalculator::getDefenseRangePenaltiesFactor() const
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+{
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+ if(info.shooting)
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+ {
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+ BattleHex attackerPos = info.attackerPos.isValid() ? info.attackerPos : info.attacker->getPosition();
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+ BattleHex defenderPos = info.defenderPos.isValid() ? info.defenderPos : info.defender->getPosition();
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+
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+ const std::string cachingStrAdvAirShield = "isAdvancedAirShield";
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+ auto isAdvancedAirShield = [](const Bonus* bonus)
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+ {
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+ return bonus->source == Bonus::SPELL_EFFECT
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+ && bonus->sid == SpellID::AIR_SHIELD
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+ && bonus->val >= SecSkillLevel::ADVANCED;
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+ };
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+
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+ const bool distPenalty = callback.battleHasDistancePenalty(info.attacker, attackerPos, defenderPos);
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+
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+ if(distPenalty || info.defender->hasBonus(isAdvancedAirShield, cachingStrAdvAirShield))
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+ return 0.5;
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+
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+ }
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+ else
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+ {
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+ const std::string cachingStrNoMeleePenalty = "type_NO_MELEE_PENALTY";
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+ static const auto selectorNoMeleePenalty = Selector::type()(Bonus::NO_MELEE_PENALTY);
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+
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+ if(info.attacker->isShooter() && !info.attacker->hasBonus(selectorNoMeleePenalty, cachingStrNoMeleePenalty))
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+ return 0.5;
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+ }
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+ return 0.0;
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+}
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+
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+double DamageCalculator::getDefenseObstacleFactor() const
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+{
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+ if(info.shooting)
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+ {
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+ BattleHex attackerPos = info.attackerPos.isValid() ? info.attackerPos : info.attacker->getPosition();
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+ BattleHex defenderPos = info.defenderPos.isValid() ? info.defenderPos : info.defender->getPosition();
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+
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+ const bool obstaclePenalty = callback.battleHasWallPenalty(info.attacker, attackerPos, defenderPos);
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+ if(obstaclePenalty)
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+ return 0.5;
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+ }
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+ return 0.0;
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+}
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+
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+double DamageCalculator::getDefenseUnluckyFactor() const
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+{
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+ if (info.unluckyStrike)
|
|
|
+ return 0.5;
|
|
|
+ return 0.0;
|
|
|
+}
|
|
|
+
|
|
|
+double DamageCalculator::getDefenseBlindParalysisFactor() const
|
|
|
+{
|
|
|
+
|
|
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+ double multAttackReduction = battleBonusValue(info.attacker, Selector::type()(Bonus::GENERAL_ATTACK_REDUCTION)) / 100.0;
|
|
|
+
|
|
|
+ return multAttackReduction;
|
|
|
+}
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|
|
+
|
|
|
+double DamageCalculator::getDefenseForgetfulnessFactor() const
|
|
|
+{
|
|
|
+ if(info.shooting)
|
|
|
+ {
|
|
|
+ //todo: set actual percentage in spell bonus configuration instead of just level; requires non trivial backward compatibility handling
|
|
|
+ //get list first, total value of 0 also counts
|
|
|
+ TConstBonusListPtr forgetfulList = info.attacker->getBonuses(Selector::type()(Bonus::FORGETFULL),"type_FORGETFULL");
|
|
|
+
|
|
|
+ if(!forgetfulList->empty())
|
|
|
+ {
|
|
|
+ int forgetful = forgetfulList->valOfBonuses(Selector::all);
|
|
|
+
|
|
|
+ //none of basic level
|
|
|
+ if(forgetful == 0 || forgetful == 1)
|
|
|
+ return 0.5;
|
|
|
+ else
|
|
|
+ logGlobal->warn("Attempt to calculate shooting damage with adv+ FORGETFULL effect");
|
|
|
+ }
|
|
|
+ }
|
|
|
+ return 0.0;
|
|
|
+}
|
|
|
+
|
|
|
+double DamageCalculator::getDefensePetrificationFactor() const
|
|
|
+{
|
|
|
+ // Creatures that are petrified by a Basilisk's Petrifying attack or a Medusa's Stone gaze take 50% damage (R8 = 0.50) from ranged and melee attacks. Taking damage also deactivates the effect.
|
|
|
+ const std::string cachingStrAllReduction = "type_GENERAL_DAMAGE_REDUCTIONs_N1";
|
|
|
+ static const auto selectorAllReduction = Selector::typeSubtype(Bonus::GENERAL_DAMAGE_REDUCTION, -1);
|
|
|
+
|
|
|
+ return info.defender->valOfBonuses(selectorAllReduction, cachingStrAllReduction) / 100.0;
|
|
|
+}
|
|
|
+
|
|
|
+double DamageCalculator::getDefenseMagicFactor() const
|
|
|
+{
|
|
|
+ // Magic Elementals deal half damage (R8 = 0.50) against Magic Elementals and Black Dragons. This is not affected by the Orb of Vulnerability, Anti-Magic, or Magic Resistance.
|
|
|
+ if(info.attacker->creatureIndex() == CreatureID::MAGIC_ELEMENTAL)
|
|
|
+ {
|
|
|
+ const std::string cachingStrMagicImmunity = "type_LEVEL_SPELL_IMMUNITY";
|
|
|
+ static const auto selectorMagicImmunity = Selector::type()(Bonus::LEVEL_SPELL_IMMUNITY);
|
|
|
+
|
|
|
+ if(info.defender->valOfBonuses(selectorMagicImmunity, cachingStrMagicImmunity) >= 5)
|
|
|
+ return 0.5;
|
|
|
+ }
|
|
|
+ return 0.0;
|
|
|
+}
|
|
|
+
|
|
|
+double DamageCalculator::getDefenseMindFactor() const
|
|
|
+{
|
|
|
+ // Psychic Elementals deal half damage (R8 = 0.50) against creatures that are immune to Mind spells, such as Giants and Undead. This is not affected by the Orb of Vulnerability.
|
|
|
+ if(info.attacker->creatureIndex() == CreatureID::PSYCHIC_ELEMENTAL)
|
|
|
+ {
|
|
|
+ const std::string cachingStrMindImmunity = "type_MIND_IMMUNITY";
|
|
|
+ static const auto selectorMindImmunity = Selector::type()(Bonus::MIND_IMMUNITY);
|
|
|
+
|
|
|
+ if(info.defender->hasBonus(selectorMindImmunity, cachingStrMindImmunity))
|
|
|
+ return 0.5;
|
|
|
+ }
|
|
|
+ return 0.0;
|
|
|
+}
|
|
|
+
|
|
|
+std::vector<double> DamageCalculator::getAttackFactors() const
|
|
|
+{
|
|
|
+ return {
|
|
|
+ getAttackSkillFactor(),
|
|
|
+ getAttackOffenseArcheryFactor(),
|
|
|
+ getAttackBlessFactor(),
|
|
|
+ getAttackLuckFactor(),
|
|
|
+ getAttackJoustingFactor(),
|
|
|
+ getAttackDeathBlowFactor(),
|
|
|
+ getAttackDoubleDamageFactor(),
|
|
|
+ getAttackHateFactor()
|
|
|
+ };
|
|
|
+}
|
|
|
+
|
|
|
+std::vector<double> DamageCalculator::getDefenseFactors() const
|
|
|
+{
|
|
|
+ return {
|
|
|
+ getDefenseSkillFactor(),
|
|
|
+ getDefenseArmorerFactor(),
|
|
|
+ getDefenseMagicShieldFactor(),
|
|
|
+ getDefenseRangePenaltiesFactor(),
|
|
|
+ getDefenseObstacleFactor(),
|
|
|
+ getDefenseBlindParalysisFactor(),
|
|
|
+ getDefenseUnluckyFactor(),
|
|
|
+ getDefenseForgetfulnessFactor(),
|
|
|
+ getDefensePetrificationFactor(),
|
|
|
+ getDefenseMagicFactor(),
|
|
|
+ getDefenseMindFactor()
|
|
|
+ };
|
|
|
+}
|
|
|
+
|
|
|
+int DamageCalculator::battleBonusValue(const IBonusBearer * bearer, const CSelector & selector) const
|
|
|
+{
|
|
|
+ auto noLimit = Selector::effectRange()(Bonus::NO_LIMIT);
|
|
|
+ auto limitMatches = info.shooting
|
|
|
+ ? Selector::effectRange()(Bonus::ONLY_DISTANCE_FIGHT)
|
|
|
+ : Selector::effectRange()(Bonus::ONLY_MELEE_FIGHT);
|
|
|
+
|
|
|
+ //any regular bonuses or just ones for melee/ranged
|
|
|
+ return bearer->getBonuses(selector, noLimit.Or(limitMatches))->totalValue();
|
|
|
+};
|
|
|
+
|
|
|
+TDmgRange DamageCalculator::calculateDmgRange() const
|
|
|
+{
|
|
|
+ TDmgRange result = getBaseDamageStack();
|
|
|
+
|
|
|
+ auto attackFactors = getAttackFactors();
|
|
|
+ auto defenseFactors = getDefenseFactors();
|
|
|
+
|
|
|
+ double attackFactorTotal = 1.0;
|
|
|
+ double defenseFactorTotal = 1.0;
|
|
|
+
|
|
|
+ for (auto & factor : attackFactors)
|
|
|
+ {
|
|
|
+ assert(factor >= 0.0);
|
|
|
+ attackFactorTotal += factor;
|
|
|
+ }
|
|
|
+
|
|
|
+ for (auto & factor : defenseFactors)
|
|
|
+ {
|
|
|
+ assert(factor >= 0.0);
|
|
|
+ defenseFactorTotal *= ( 1 - std::min(1.0, factor));
|
|
|
+ }
|
|
|
+
|
|
|
+ double resultingFactor = std::min(8.0, attackFactorTotal) * std::max( 0.01, defenseFactorTotal);
|
|
|
+
|
|
|
+ return {
|
|
|
+ std::max( 1.0, std::floor(result.first * resultingFactor)),
|
|
|
+ std::max( 1.0, std::floor(result.second * resultingFactor))
|
|
|
+ };
|
|
|
+}
|
Ivan Savenko