#include "combat.hpp"
#include <components/misc/rng.hpp>
#include <components/settings/values.hpp>
#include <components/sceneutil/positionattitudetransform.hpp>
#include <components/esm3/loadench.hpp>
#include <components/esm3/loadmgef.hpp>
#include <components/esm3/loadsoun.hpp>
#include "../mwbase/dialoguemanager.hpp"
#include "../mwbase/environment.hpp"
#include "../mwbase/mechanicsmanager.hpp"
#include "../mwbase/soundmanager.hpp"
#include "../mwbase/windowmanager.hpp"
#include "../mwbase/world.hpp"
#include "../mwworld/class.hpp"
#include "../mwworld/esmstore.hpp"
#include "../mwworld/globals.hpp"
#include "../mwworld/inventorystore.hpp"
#include "actorutil.hpp"
#include "difficultyscaling.hpp"
#include "movement.hpp"
#include "npcstats.hpp"
#include "pathfinding.hpp"
#include "spellcasting.hpp"
#include "spellresistance.hpp"
namespace
{
float signedAngleRadians(const osg::Vec3f& v1, const osg::Vec3f& v2, const osg::Vec3f& normal)
{
return std::atan2((normal * (v1 ^ v2)), (v1 * v2));
}
}
namespace MWMechanics
{
bool applyOnStrikeEnchantment(const MWWorld::Ptr& attacker, const MWWorld::Ptr& victim, const MWWorld::Ptr& object,
const osg::Vec3f& hitPosition, const bool fromProjectile)
{
const ESM::RefId enchantmentName = !object.isEmpty() ? object.getClass().getEnchantment(object) : ESM::RefId();
if (!enchantmentName.empty())
{
const ESM::Enchantment* enchantment
= MWBase::Environment::get().getESMStore()->get<ESM::Enchantment>().find(enchantmentName);
if (enchantment->mData.mType == ESM::Enchantment::WhenStrikes)
{
MWMechanics::CastSpell cast(attacker, victim, fromProjectile);
cast.mHitPosition = hitPosition;
cast.cast(object, false);
// Apply magic effects directly instead of waiting a frame to allow soul trap to work on one-hit kills
if (!victim.isEmpty() && victim.getClass().isActor())
MWBase::Environment::get().getMechanicsManager()->updateMagicEffects(victim);
return true;
}
}
return false;
}
bool blockMeleeAttack(const MWWorld::Ptr& attacker, const MWWorld::Ptr& blocker, const MWWorld::Ptr& weapon,
float damage, float attackStrength)
{
if (!blocker.getClass().hasInventoryStore(blocker))
return false;
MWMechanics::CreatureStats& blockerStats = blocker.getClass().getCreatureStats(blocker);
if (blockerStats.getKnockedDown() // Used for both knockout or knockdown
|| blockerStats.getHitRecovery() || blockerStats.isParalyzed())
return false;
if (!MWBase::Environment::get().getMechanicsManager()->isReadyToBlock(blocker))
return false;
MWWorld::InventoryStore& inv = blocker.getClass().getInventoryStore(blocker);
MWWorld::ContainerStoreIterator shield = inv.getSlot(MWWorld::InventoryStore::Slot_CarriedLeft);
if (shield == inv.end() || shield->getType() != ESM::Armor::sRecordId)
return false;
if (!blocker.getRefData().getBaseNode())
return false; // shouldn't happen
float angleDegrees = osg::RadiansToDegrees(signedAngleRadians(
(attacker.getRefData().getPosition().asVec3() - blocker.getRefData().getPosition().asVec3()),
blocker.getRefData().getBaseNode()->getAttitude() * osg::Vec3f(0, 1, 0), osg::Vec3f(0, 0, 1)));
const MWWorld::Store<ESM::GameSetting>& gmst
= MWBase::Environment::get().getESMStore()->get<ESM::GameSetting>();
static const float fCombatBlockLeftAngle = gmst.find("fCombatBlockLeftAngle")->mValue.getFloat();
if (angleDegrees < fCombatBlockLeftAngle)
return false;
static const float fCombatBlockRightAngle = gmst.find("fCombatBlockRightAngle")->mValue.getFloat();
if (angleDegrees > fCombatBlockRightAngle)
return false;
MWMechanics::CreatureStats& attackerStats = attacker.getClass().getCreatureStats(attacker);
float blockTerm = blocker.getClass().getSkill(blocker, ESM::Skill::Block)
+ 0.2f * blockerStats.getAttribute(ESM::Attribute::Agility).getModified()
+ 0.1f * blockerStats.getAttribute(ESM::Attribute::Luck).getModified();
float enemySwing = attackStrength;
static const float fSwingBlockMult = gmst.find("fSwingBlockMult")->mValue.getFloat();
static const float fSwingBlockBase = gmst.find("fSwingBlockBase")->mValue.getFloat();
float swingTerm = enemySwing * fSwingBlockMult + fSwingBlockBase;
float blockerTerm = blockTerm * swingTerm;
if (blocker.getClass().getMovementSettings(blocker).mPosition[1] <= 0)
{
static const float fBlockStillBonus = gmst.find("fBlockStillBonus")->mValue.getFloat();
blockerTerm *= fBlockStillBonus;
}
blockerTerm *= blockerStats.getFatigueTerm();
float attackerSkill = 0;
if (weapon.isEmpty())
attackerSkill = attacker.getClass().getSkill(attacker, ESM::Skill::HandToHand);
else
attackerSkill = attacker.getClass().getSkill(attacker, weapon.getClass().getEquipmentSkill(weapon));
float attackerTerm = attackerSkill + 0.2f * attackerStats.getAttribute(ESM::Attribute::Agility).getModified()
+ 0.1f * attackerStats.getAttribute(ESM::Attribute::Luck).getModified();
attackerTerm *= attackerStats.getFatigueTerm();
static const int iBlockMaxChance = gmst.find("iBlockMaxChance")->mValue.getInteger();
static const int iBlockMinChance = gmst.find("iBlockMinChance")->mValue.getInteger();
int x = std::clamp<int>(blockerTerm - attackerTerm, iBlockMinChance, iBlockMaxChance);
auto& prng = MWBase::Environment::get().getWorld()->getPrng();
if (Misc::Rng::roll0to99(prng) < x)
{
MWBase::SoundManager* sndMgr = MWBase::Environment::get().getSoundManager();
const ESM::RefId skill = shield->getClass().getEquipmentSkill(*shield);
if (skill == ESM::Skill::LightArmor)
sndMgr->playSound3D(blocker, ESM::RefId::stringRefId("Light Armor Hit"), 1.0f, 1.0f);
else if (skill == ESM::Skill::MediumArmor)
sndMgr->playSound3D(blocker, ESM::RefId::stringRefId("Medium Armor Hit"), 1.0f, 1.0f);
else if (skill == ESM::Skill::HeavyArmor)
sndMgr->playSound3D(blocker, ESM::RefId::stringRefId("Heavy Armor Hit"), 1.0f, 1.0f);
// Reduce shield durability by incoming damage
int shieldhealth = shield->getClass().getItemHealth(*shield);
shieldhealth -= std::min(shieldhealth, int(damage));
shield->getCellRef().setCharge(shieldhealth);
if (shieldhealth == 0)
inv.unequipItem(*shield);
// Reduce blocker fatigue
static const float fFatigueBlockBase = gmst.find("fFatigueBlockBase")->mValue.getFloat();
static const float fFatigueBlockMult = gmst.find("fFatigueBlockMult")->mValue.getFloat();
static const float fWeaponFatigueBlockMult = gmst.find("fWeaponFatigueBlockMult")->mValue.getFloat();
MWMechanics::DynamicStat<float> fatigue = blockerStats.getFatigue();
float normalizedEncumbrance = blocker.getClass().getNormalizedEncumbrance(blocker);
normalizedEncumbrance = std::min(1.f, normalizedEncumbrance);
float fatigueLoss = fFatigueBlockBase + normalizedEncumbrance * fFatigueBlockMult;
if (!weapon.isEmpty())
fatigueLoss += weapon.getClass().getWeight(weapon) * attackStrength * fWeaponFatigueBlockMult;
fatigue.setCurrent(fatigue.getCurrent() - fatigueLoss);
blockerStats.setFatigue(fatigue);
blockerStats.setBlock(true);
if (blocker == getPlayer())
blocker.getClass().skillUsageSucceeded(blocker, ESM::Skill::Block, ESM::Skill::Block_Success);
return true;
}
return false;
}
bool isNormalWeapon(const MWWorld::Ptr& weapon)
{
if (weapon.isEmpty())
return false;
const int flags = weapon.get<ESM::Weapon>()->mBase->mData.mFlags;
bool isSilver = flags & ESM::Weapon::Silver;
bool isMagical = flags & ESM::Weapon::Magical;
bool isEnchanted = !weapon.getClass().getEnchantment(weapon).empty();
return !isSilver && !isMagical && (!isEnchanted || !Settings::game().mEnchantedWeaponsAreMagical);
}
void resistNormalWeapon(
const MWWorld::Ptr& actor, const MWWorld::Ptr& attacker, const MWWorld::Ptr& weapon, float& damage)
{
if (weapon.isEmpty() || !isNormalWeapon(weapon))
return;
const MWMechanics::MagicEffects& effects = actor.getClass().getCreatureStats(actor).getMagicEffects();
const float resistance = effects.getOrDefault(ESM::MagicEffect::ResistNormalWeapons).getMagnitude() / 100.f;
const float weakness = effects.getOrDefault(ESM::MagicEffect::WeaknessToNormalWeapons).getMagnitude() / 100.f;
damage *= 1.f - std::min(1.f, resistance - weakness);
if (resistance - weakness >= 1.f && attacker == getPlayer())
MWBase::Environment::get().getWindowManager()->messageBox("#{sMagicTargetResistsWeapons}");
}
void applyWerewolfDamageMult(const MWWorld::Ptr& actor, const MWWorld::Ptr& weapon, float& damage)
{
if (damage == 0 || weapon.isEmpty() || !actor.getClass().isNpc())
return;
const int flags = weapon.get<ESM::Weapon>()->mBase->mData.mFlags;
bool isSilver = flags & ESM::Weapon::Silver;
if (isSilver && actor.getClass().getNpcStats(actor).isWerewolf())
{
const MWWorld::ESMStore& store = *MWBase::Environment::get().getESMStore();
damage *= store.get<ESM::GameSetting>().find("fWereWolfSilverWeaponDamageMult")->mValue.getFloat();
}
}
void projectileHit(const MWWorld::Ptr& attacker, const MWWorld::Ptr& victim, MWWorld::Ptr weapon,
const MWWorld::Ptr& projectile, const osg::Vec3f& hitPosition, float attackStrength)
{
MWBase::World* world = MWBase::Environment::get().getWorld();
const MWWorld::Store<ESM::GameSetting>& gmst = world->getStore().get<ESM::GameSetting>();
bool validVictim = !victim.isEmpty() && victim.getClass().isActor();
ESM::RefId weaponSkill = ESM::Skill::Marksman;
if (!weapon.isEmpty())
weaponSkill = weapon.getClass().getEquipmentSkill(weapon);
float damage = 0.f;
if (validVictim)
{
if (attacker == getPlayer())
MWBase::Environment::get().getWindowManager()->setEnemy(victim);
int skillValue = attacker.getClass().getSkill(attacker, weaponSkill);
if (Misc::Rng::roll0to99(world->getPrng()) >= getHitChance(attacker, victim, skillValue))
{
victim.getClass().onHit(victim, damage, false, projectile, attacker, osg::Vec3f(), false,
MWMechanics::DamageSourceType::Ranged);
MWMechanics::reduceWeaponCondition(damage, false, weapon, attacker);
return;
}
{
const auto& attack = weapon.get<ESM::Weapon>()->mBase->mData.mChop;
damage = attack[0] + ((attack[1] - attack[0]) * attackStrength); // Bow/crossbow damage
}
{
// Arrow/bolt damage
// NB in case of thrown weapons, we are applying the damage twice since projectile == weapon
const auto& attack = projectile.get<ESM::Weapon>()->mBase->mData.mChop;
damage += attack[0] + ((attack[1] - attack[0]) * attackStrength);
}
adjustWeaponDamage(damage, weapon, attacker);
}
reduceWeaponCondition(damage, validVictim, weapon, attacker);
if (validVictim)
{
if (weapon == projectile || Settings::game().mOnlyAppropriateAmmunitionBypassesResistance
|| isNormalWeapon(weapon))
resistNormalWeapon(victim, attacker, projectile, damage);
applyWerewolfDamageMult(victim, projectile, damage);
if (attacker == getPlayer())
attacker.getClass().skillUsageSucceeded(attacker, weaponSkill, ESM::Skill::Weapon_SuccessfulHit);
const MWMechanics::AiSequence& sequence = victim.getClass().getCreatureStats(victim).getAiSequence();
bool unaware = attacker == getPlayer() && !sequence.isInCombat()
&& !MWBase::Environment::get().getMechanicsManager()->awarenessCheck(attacker, victim);
bool knockedDown = victim.getClass().getCreatureStats(victim).getKnockedDown();
if (knockedDown || unaware)
{
static const float fCombatKODamageMult = gmst.find("fCombatKODamageMult")->mValue.getFloat();
damage *= fCombatKODamageMult;
if (!knockedDown)
MWBase::Environment::get().getSoundManager()->playSound3D(
victim, ESM::RefId::stringRefId("critical damage"), 1.0f, 1.0f);
}
}
// Apply "On hit" effect of the projectile
bool appliedEnchantment = applyOnStrikeEnchantment(attacker, victim, projectile, hitPosition, true);
if (validVictim)
{
// Non-enchanted arrows shot at enemies have a chance to turn up in their inventory
if (victim != getPlayer() && !appliedEnchantment)
{
static const float fProjectileThrownStoreChance
= gmst.find("fProjectileThrownStoreChance")->mValue.getFloat();
if (Misc::Rng::rollProbability(world->getPrng()) < fProjectileThrownStoreChance / 100.f)
victim.getClass().getContainerStore(victim).add(projectile, 1);
}
victim.getClass().onHit(
victim, damage, true, projectile, attacker, hitPosition, true, MWMechanics::DamageSourceType::Ranged);
}
}
float getHitChance(const MWWorld::Ptr& attacker, const MWWorld::Ptr& victim, int skillValue)
{
MWMechanics::CreatureStats& stats = attacker.getClass().getCreatureStats(attacker);
const MWMechanics::MagicEffects& mageffects = stats.getMagicEffects();
MWBase::World* world = MWBase::Environment::get().getWorld();
const MWWorld::Store<ESM::GameSetting>& gmst = world->getStore().get<ESM::GameSetting>();
float defenseTerm = 0;
MWMechanics::CreatureStats& victimStats = victim.getClass().getCreatureStats(victim);
if (victimStats.getFatigue().getCurrent() >= 0)
{
// Maybe we should keep an aware state for actors updated every so often instead of testing every time
bool unaware = (!victimStats.getAiSequence().isInCombat()) && (attacker == getPlayer())
&& (!MWBase::Environment::get().getMechanicsManager()->awarenessCheck(attacker, victim));
if (!(victimStats.getKnockedDown() || victimStats.isParalyzed() || unaware))
{
defenseTerm = victimStats.getEvasion();
}
static const float fCombatInvisoMult = gmst.find("fCombatInvisoMult")->mValue.getFloat();
defenseTerm += std::min(100.f,
fCombatInvisoMult
* victimStats.getMagicEffects().getOrDefault(ESM::MagicEffect::Chameleon).getMagnitude());
defenseTerm += std::min(100.f,
fCombatInvisoMult
* victimStats.getMagicEffects().getOrDefault(ESM::MagicEffect::Invisibility).getMagnitude());
}
float attackTerm = skillValue + (stats.getAttribute(ESM::Attribute::Agility).getModified() / 5.0f)
+ (stats.getAttribute(ESM::Attribute::Luck).getModified() / 10.0f);
attackTerm *= stats.getFatigueTerm();
attackTerm += mageffects.getOrDefault(ESM::MagicEffect::FortifyAttack).getMagnitude()
- mageffects.getOrDefault(ESM::MagicEffect::Blind).getMagnitude();
return round(attackTerm - defenseTerm);
}
void applyElementalShields(const MWWorld::Ptr& attacker, const MWWorld::Ptr& victim)
{
// Don't let elemental shields harm the player in god mode.
bool godmode = attacker == getPlayer() && MWBase::Environment::get().getWorld()->getGodModeState();
if (godmode)
return;
auto& prng = MWBase::Environment::get().getWorld()->getPrng();
for (int i = 0; i < 3; ++i)
{
float magnitude = victim.getClass()
.getCreatureStats(victim)
.getMagicEffects()
.getOrDefault(ESM::MagicEffect::FireShield + i)
.getMagnitude();
if (!magnitude)
continue;
CreatureStats& attackerStats = attacker.getClass().getCreatureStats(attacker);
float saveTerm = attacker.getClass().getSkill(attacker, ESM::Skill::Destruction)
+ 0.2f * attackerStats.getAttribute(ESM::Attribute::Willpower).getModified()
+ 0.1f * attackerStats.getAttribute(ESM::Attribute::Luck).getModified();
float fatigueMax = attackerStats.getFatigue().getModified();
float fatigueCurrent = attackerStats.getFatigue().getCurrent();
float normalisedFatigue = floor(fatigueMax) == 0 ? 1 : std::max(0.0f, (fatigueCurrent / fatigueMax));
saveTerm *= 1.25f * normalisedFatigue;
float x = std::max(0.f, saveTerm - Misc::Rng::roll0to99(prng));
int element = ESM::MagicEffect::FireDamage;
if (i == 1)
element = ESM::MagicEffect::ShockDamage;
if (i == 2)
element = ESM::MagicEffect::FrostDamage;
float elementResistance
= MWMechanics::getEffectResistanceAttribute(element, &attackerStats.getMagicEffects());
x = std::min(100.f, x + elementResistance);
static const float fElementalShieldMult = MWBase::Environment::get()
.getESMStore()
->get<ESM::GameSetting>()
.find("fElementalShieldMult")
->mValue.getFloat();
x = fElementalShieldMult * magnitude * (1.f - 0.01f * x);
// Note swapped victim and attacker, since the attacker takes the damage here.
x = scaleDamage(x, victim, attacker);
MWMechanics::DynamicStat<float> health = attackerStats.getHealth();
health.setCurrent(health.getCurrent() - x);
attackerStats.setHealth(health);
MWBase::Environment::get().getSoundManager()->playSound3D(
attacker, ESM::RefId::stringRefId("Health Damage"), 1.0f, 1.0f);
}
}
void reduceWeaponCondition(float damage, bool hit, MWWorld::Ptr& weapon, const MWWorld::Ptr& attacker)
{
if (weapon.isEmpty())
return;
if (!hit)
damage = 0.f;
const bool weaphashealth = weapon.getClass().hasItemHealth(weapon);
if (weaphashealth)
{
int weaphealth = weapon.getClass().getItemHealth(weapon);
bool godmode
= attacker == MWMechanics::getPlayer() && MWBase::Environment::get().getWorld()->getGodModeState();
// weapon condition does not degrade when godmode is on
if (!godmode)
{
const float fWeaponDamageMult = MWBase::Environment::get()
.getESMStore()
->get<ESM::GameSetting>()
.find("fWeaponDamageMult")
->mValue.getFloat();
float x = std::max(1.f, fWeaponDamageMult * damage);
weaphealth -= std::min(int(x), weaphealth);
weapon.getCellRef().setCharge(weaphealth);
}
// Weapon broken? unequip it
if (weaphealth == 0)
weapon = *attacker.getClass().getInventoryStore(attacker).unequipItem(weapon);
}
}
void adjustWeaponDamage(float& damage, const MWWorld::Ptr& weapon, const MWWorld::Ptr& attacker)
{
if (weapon.isEmpty())
return;
const bool weaphashealth = weapon.getClass().hasItemHealth(weapon);
if (weaphashealth)
{
damage *= weapon.getClass().getItemNormalizedHealth(weapon);
}
static const float fDamageStrengthBase = MWBase::Environment::get()
.getESMStore()
->get<ESM::GameSetting>()
.find("fDamageStrengthBase")
->mValue.getFloat();
static const float fDamageStrengthMult = MWBase::Environment::get()
.getESMStore()
->get<ESM::GameSetting>()
.find("fDamageStrengthMult")
->mValue.getFloat();
damage *= fDamageStrengthBase
+ (attacker.getClass().getCreatureStats(attacker).getAttribute(ESM::Attribute::Strength).getModified()
* fDamageStrengthMult * 0.1f);
}
void getHandToHandDamage(
const MWWorld::Ptr& attacker, const MWWorld::Ptr& victim, float& damage, bool& healthdmg, float attackStrength)
{
const MWWorld::ESMStore& store = *MWBase::Environment::get().getESMStore();
static const float minstrike = store.get<ESM::GameSetting>().find("fMinHandToHandMult")->mValue.getFloat();
static const float maxstrike = store.get<ESM::GameSetting>().find("fMaxHandToHandMult")->mValue.getFloat();
damage = static_cast<float>(attacker.getClass().getSkill(attacker, ESM::Skill::HandToHand));
damage *= minstrike + ((maxstrike - minstrike) * attackStrength);
MWMechanics::CreatureStats& otherstats = victim.getClass().getCreatureStats(victim);
healthdmg = otherstats.isParalyzed() || otherstats.getKnockedDown();
bool isWerewolf = (attacker.getClass().isNpc() && attacker.getClass().getNpcStats(attacker).isWerewolf());
// Options in the launcher's combo box: unarmedFactorsStrengthComboBox
// 0 = Do not factor strength into hand-to-hand combat.
// 1 = Factor into werewolf hand-to-hand combat.
// 2 = Ignore werewolves.
const int factorStrength = Settings::game().mStrengthInfluencesHandToHand;
if (factorStrength == 1 || (factorStrength == 2 && !isWerewolf))
{
damage
*= attacker.getClass().getCreatureStats(attacker).getAttribute(ESM::Attribute::Strength).getModified()
/ 40.0f;
}
if (isWerewolf)
{
healthdmg = true;
// GLOB instead of GMST because it gets updated during a quest
damage *= MWBase::Environment::get().getWorld()->getGlobalFloat(MWWorld::Globals::sWerewolfClawMult);
}
if (healthdmg)
{
static const float fHandtoHandHealthPer
= store.get<ESM::GameSetting>().find("fHandtoHandHealthPer")->mValue.getFloat();
damage *= fHandtoHandHealthPer;
}
MWBase::SoundManager* sndMgr = MWBase::Environment::get().getSoundManager();
if (isWerewolf)
{
auto& prng = MWBase::Environment::get().getWorld()->getPrng();
const ESM::Sound* sound = store.get<ESM::Sound>().searchRandom("WolfHit", prng);
if (sound)
sndMgr->playSound3D(victim, sound->mId, 1.0f, 1.0f);
}
else if (!healthdmg)
sndMgr->playSound3D(victim, ESM::RefId::stringRefId("Hand To Hand Hit"), 1.0f, 1.0f);
}
void applyFatigueLoss(const MWWorld::Ptr& attacker, const MWWorld::Ptr& weapon, float attackStrength)
{
// somewhat of a guess, but using the weapon weight makes sense
const MWWorld::Store<ESM::GameSetting>& store
= MWBase::Environment::get().getESMStore()->get<ESM::GameSetting>();
static const float fFatigueAttackBase = store.find("fFatigueAttackBase")->mValue.getFloat();
static const float fFatigueAttackMult = store.find("fFatigueAttackMult")->mValue.getFloat();
static const float fWeaponFatigueMult = store.find("fWeaponFatigueMult")->mValue.getFloat();
CreatureStats& stats = attacker.getClass().getCreatureStats(attacker);
MWMechanics::DynamicStat<float> fatigue = stats.getFatigue();
const float normalizedEncumbrance = attacker.getClass().getNormalizedEncumbrance(attacker);
bool godmode = attacker == MWMechanics::getPlayer() && MWBase::Environment::get().getWorld()->getGodModeState();
if (!godmode)
{
float fatigueLoss = fFatigueAttackBase + normalizedEncumbrance * fFatigueAttackMult;
if (!weapon.isEmpty())
fatigueLoss += weapon.getClass().getWeight(weapon) * attackStrength * fWeaponFatigueMult;
fatigue.setCurrent(fatigue.getCurrent() - fatigueLoss);
stats.setFatigue(fatigue);
}
}
float getFightDistanceBias(const MWWorld::Ptr& actor1, const MWWorld::Ptr& actor2)
{
osg::Vec3f pos1(actor1.getRefData().getPosition().asVec3());
osg::Vec3f pos2(actor2.getRefData().getPosition().asVec3());
float d = getAggroDistance(actor1, pos1, pos2);
static const int iFightDistanceBase = MWBase::Environment::get()
.getESMStore()
->get<ESM::GameSetting>()
.find("iFightDistanceBase")
->mValue.getInteger();
static const float fFightDistanceMultiplier = MWBase::Environment::get()
.getESMStore()
->get<ESM::GameSetting>()
.find("fFightDistanceMultiplier")
->mValue.getFloat();
return (iFightDistanceBase - fFightDistanceMultiplier * d);
}
float getAggroDistance(const MWWorld::Ptr& actor, const osg::Vec3f& lhs, const osg::Vec3f& rhs)
{
if (canActorMoveByZAxis(actor))
return distanceIgnoreZ(lhs, rhs);
return distance(lhs, rhs);
}
float getDistanceToBounds(const MWWorld::Ptr& actor, const MWWorld::Ptr& target)
{
osg::Vec3f actorPos(actor.getRefData().getPosition().asVec3());
osg::Vec3f targetPos(target.getRefData().getPosition().asVec3());
MWBase::World* world = MWBase::Environment::get().getWorld();
float dist = (targetPos - actorPos).length();
dist -= world->getHalfExtents(actor).y();
dist -= world->getHalfExtents(target).y();
return dist;
}
std::pair<MWWorld::Ptr, osg::Vec3f> getHitContact(const MWWorld::Ptr& actor, float reach)
{
// Lasciate ogne speranza, voi ch'entrate
MWWorld::Ptr result;
osg::Vec3f hitPos;
float minDist = std::numeric_limits<float>::max();
MWBase::World* world = MWBase::Environment::get().getWorld();
const MWWorld::Store<ESM::GameSetting>& store = world->getStore().get<ESM::GameSetting>();
// These GMSTs are not in degrees. They're tolerance angle sines multiplied by 90.
// With the default values of 60, the actual tolerance angles are roughly 41.8 degrees.
// Don't think too hard about it. In this place, thinking can cause permanent damage to your mental health.
const float fCombatAngleXY = store.find("fCombatAngleXY")->mValue.getFloat() / 90.f;
const float fCombatAngleZ = store.find("fCombatAngleZ")->mValue.getFloat() / 90.f;
const ESM::Position& posdata = actor.getRefData().getPosition();
const osg::Vec3f actorPos(posdata.asVec3());
const osg::Vec3f actorDirXY = osg::Quat(posdata.rot[2], osg::Vec3(0, 0, -1)) * osg::Vec3f(0, 1, 0);
// Only the player can look up, apparently.
const float actorVerticalAngle = actor == getPlayer() ? -std::sin(posdata.rot[0]) : 0.f;
const float actorEyeLevel = world->getHalfExtents(actor, true).z() * 2.f * 0.85f;
const osg::Vec3f actorEyePos{ actorPos.x(), actorPos.y(), actorPos.z() + actorEyeLevel };
const bool canMoveByZ = canActorMoveByZAxis(actor);
// The player can target any active actor, non-playable actors only target their targets
std::vector<MWWorld::Ptr> targets;
if (actor != getPlayer())
actor.getClass().getCreatureStats(actor).getAiSequence().getCombatTargets(targets);
else
MWBase::Environment::get().getMechanicsManager()->getActorsInRange(
actorPos, Settings::game().mActorsProcessingRange, targets);
for (MWWorld::Ptr& target : targets)
{
if (actor == target || target.getClass().getCreatureStats(target).isDead())
continue;
const float dist = getDistanceToBounds(actor, target);
const osg::Vec3f targetPos(target.getRefData().getPosition().asVec3());
if (dist >= reach || dist >= minDist || std::abs(targetPos.z() - actorPos.z()) >= reach)
continue;
// Horizontal angle checks.
osg::Vec2f actorToTargetXY{ targetPos.x() - actorPos.x(), targetPos.y() - actorPos.y() };
actorToTargetXY.normalize();
// Use dot product to check if the target is behind first...
if (actorToTargetXY.x() * actorDirXY.x() + actorToTargetXY.y() * actorDirXY.y() <= 0.f)
continue;
// And then perp dot product to calculate the hit angle sine.
// This gives us a horizontal hit range of [-asin(fCombatAngleXY / 90); asin(fCombatAngleXY / 90)]
if (std::abs(actorToTargetXY.x() * actorDirXY.y() - actorToTargetXY.y() * actorDirXY.x()) > fCombatAngleXY)
continue;
// Vertical angle checks. Nice cliff racer hack, Todd.
if (!canMoveByZ)
{
// The idea is that the body should always be possible to hit.
// fCombatAngleZ is the tolerance for hitting the target's feet or head.
osg::Vec3f actorToTargetFeet = targetPos - actorEyePos;
osg::Vec3f actorToTargetHead = actorToTargetFeet;
actorToTargetFeet.normalize();
actorToTargetHead.z() += world->getHalfExtents(target, true).z() * 2.f;
actorToTargetHead.normalize();
if (actorVerticalAngle - actorToTargetHead.z() > fCombatAngleZ
|| actorVerticalAngle - actorToTargetFeet.z() < -fCombatAngleZ)
continue;
}
// Gotta use physics somehow!
if (!world->getLOS(actor, target))
continue;
minDist = dist;
result = target;
}
// This hit position is currently used for spawning the blood effect.
// Morrowind does this elsewhere, but roughly at the same time
// and it would be hard to track the original hit results outside of this function
// without code duplication
// The idea is to use a random point on a plane in front of the target
// that is defined by its width and height
if (!result.isEmpty())
{
osg::Vec3f resultPos(result.getRefData().getPosition().asVec3());
osg::Vec3f dirToActor = actorPos - resultPos;
dirToActor.normalize();
hitPos = resultPos + dirToActor * world->getHalfExtents(result).y();
// -25% to 25% of width
float xOffset = Misc::Rng::deviate(0.f, 0.25f, world->getPrng());
// 20% to 100% of height
float zOffset = Misc::Rng::deviate(0.6f, 0.4f, world->getPrng());
hitPos.x() += world->getHalfExtents(result).x() * 2.f * xOffset;
hitPos.z() += world->getHalfExtents(result).z() * 2.f * zOffset;
}
return std::make_pair(result, hitPos);
}
bool friendlyHit(const MWWorld::Ptr& attacker, const MWWorld::Ptr& target, bool complain)
{
const MWWorld::Ptr& player = getPlayer();
if (attacker != player)
return false;
std::set<MWWorld::Ptr> followersAttacker;
MWBase::Environment::get().getMechanicsManager()->getActorsSidingWith(attacker, followersAttacker);
if (followersAttacker.find(target) == followersAttacker.end())
return false;
MWMechanics::CreatureStats& statsTarget = target.getClass().getCreatureStats(target);
if (statsTarget.getAiSequence().isInCombat())
return true;
statsTarget.friendlyHit();
if (statsTarget.getFriendlyHits() >= 4)
return false;
if (complain)
MWBase::Environment::get().getDialogueManager()->say(target, ESM::RefId::stringRefId("hit"));
return true;
}
}