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449 lines
21 KiB
C++
449 lines
21 KiB
C++
#include "combat.hpp"
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#include <components/misc/rng.hpp>
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#include <components/settings/settings.hpp>
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#include <components/sceneutil/positionattitudetransform.hpp>
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#include "../mwbase/environment.hpp"
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#include "../mwbase/world.hpp"
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#include "../mwbase/mechanicsmanager.hpp"
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#include "../mwbase/soundmanager.hpp"
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#include "../mwbase/windowmanager.hpp"
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#include "../mwworld/class.hpp"
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#include "../mwworld/inventorystore.hpp"
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#include "../mwworld/esmstore.hpp"
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#include "npcstats.hpp"
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#include "movement.hpp"
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#include "spellcasting.hpp"
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#include "difficultyscaling.hpp"
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#include "actorutil.hpp"
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namespace
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{
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float signedAngleRadians (const osg::Vec3f& v1, const osg::Vec3f& v2, const osg::Vec3f& normal)
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{
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return std::atan2((normal * (v1 ^ v2)), (v1 * v2));
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}
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}
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namespace MWMechanics
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{
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bool applyOnStrikeEnchantment(const MWWorld::Ptr& attacker, const MWWorld::Ptr& victim, const MWWorld::Ptr& object, const osg::Vec3f& hitPosition, const bool fromProjectile)
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{
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std::string enchantmentName = !object.isEmpty() ? object.getClass().getEnchantment(object) : "";
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if (!enchantmentName.empty())
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{
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const ESM::Enchantment* enchantment = MWBase::Environment::get().getWorld()->getStore().get<ESM::Enchantment>().find(
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enchantmentName);
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if (enchantment->mData.mType == ESM::Enchantment::WhenStrikes)
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{
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MWMechanics::CastSpell cast(attacker, victim, fromProjectile);
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cast.mHitPosition = hitPosition;
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cast.cast(object, false);
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return true;
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}
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}
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return false;
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}
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bool blockMeleeAttack(const MWWorld::Ptr &attacker, const MWWorld::Ptr &blocker, const MWWorld::Ptr &weapon, float damage, float attackStrength)
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{
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if (!blocker.getClass().hasInventoryStore(blocker))
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return false;
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MWMechanics::CreatureStats& blockerStats = blocker.getClass().getCreatureStats(blocker);
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if (blockerStats.getKnockedDown() // Used for both knockout or knockdown
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|| blockerStats.getHitRecovery()
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|| blockerStats.isParalyzed())
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return false;
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if (!MWBase::Environment::get().getMechanicsManager()->isReadyToBlock(blocker))
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return false;
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MWWorld::InventoryStore& inv = blocker.getClass().getInventoryStore(blocker);
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MWWorld::ContainerStoreIterator shield = inv.getSlot(MWWorld::InventoryStore::Slot_CarriedLeft);
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if (shield == inv.end() || shield->getTypeName() != typeid(ESM::Armor).name())
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return false;
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if (!blocker.getRefData().getBaseNode())
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return false; // shouldn't happen
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float angleDegrees = osg::RadiansToDegrees(
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signedAngleRadians (
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(attacker.getRefData().getPosition().asVec3() - blocker.getRefData().getPosition().asVec3()),
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blocker.getRefData().getBaseNode()->getAttitude() * osg::Vec3f(0,1,0),
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osg::Vec3f(0,0,1)));
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const MWWorld::Store<ESM::GameSetting>& gmst = MWBase::Environment::get().getWorld()->getStore().get<ESM::GameSetting>();
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if (angleDegrees < gmst.find("fCombatBlockLeftAngle")->getFloat())
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return false;
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if (angleDegrees > gmst.find("fCombatBlockRightAngle")->getFloat())
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return false;
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MWMechanics::CreatureStats& attackerStats = attacker.getClass().getCreatureStats(attacker);
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float blockTerm = blocker.getClass().getSkill(blocker, ESM::Skill::Block) + 0.2f * blockerStats.getAttribute(ESM::Attribute::Agility).getModified()
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+ 0.1f * blockerStats.getAttribute(ESM::Attribute::Luck).getModified();
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float enemySwing = attackStrength;
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float swingTerm = enemySwing * gmst.find("fSwingBlockMult")->getFloat() + gmst.find("fSwingBlockBase")->getFloat();
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float blockerTerm = blockTerm * swingTerm;
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if (blocker.getClass().getMovementSettings(blocker).mPosition[1] <= 0)
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blockerTerm *= gmst.find("fBlockStillBonus")->getFloat();
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blockerTerm *= blockerStats.getFatigueTerm();
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int attackerSkill = 0;
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if (weapon.isEmpty())
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attackerSkill = attacker.getClass().getSkill(attacker, ESM::Skill::HandToHand);
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else
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attackerSkill = attacker.getClass().getSkill(attacker, weapon.getClass().getEquipmentSkill(weapon));
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float attackerTerm = attackerSkill + 0.2f * attackerStats.getAttribute(ESM::Attribute::Agility).getModified()
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+ 0.1f * attackerStats.getAttribute(ESM::Attribute::Luck).getModified();
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attackerTerm *= attackerStats.getFatigueTerm();
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int x = int(blockerTerm - attackerTerm);
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int iBlockMaxChance = gmst.find("iBlockMaxChance")->getInt();
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int iBlockMinChance = gmst.find("iBlockMinChance")->getInt();
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x = std::min(iBlockMaxChance, std::max(iBlockMinChance, x));
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if (Misc::Rng::roll0to99() < x)
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{
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if (!(weapon.isEmpty() && !attacker.getClass().isNpc())) // Unarmed creature attacks don't affect armor condition
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{
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// Reduce shield durability by incoming damage
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int shieldhealth = shield->getClass().getItemHealth(*shield);
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shieldhealth -= std::min(shieldhealth, int(damage));
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shield->getCellRef().setCharge(shieldhealth);
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if (shieldhealth == 0)
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inv.unequipItem(*shield, blocker);
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}
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// Reduce blocker fatigue
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const float fFatigueBlockBase = gmst.find("fFatigueBlockBase")->getFloat();
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const float fFatigueBlockMult = gmst.find("fFatigueBlockMult")->getFloat();
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const float fWeaponFatigueBlockMult = gmst.find("fWeaponFatigueBlockMult")->getFloat();
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MWMechanics::DynamicStat<float> fatigue = blockerStats.getFatigue();
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float normalizedEncumbrance = blocker.getClass().getNormalizedEncumbrance(blocker);
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normalizedEncumbrance = std::min(1.f, normalizedEncumbrance);
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float fatigueLoss = fFatigueBlockBase + normalizedEncumbrance * fFatigueBlockMult;
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if (!weapon.isEmpty())
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fatigueLoss += weapon.getClass().getWeight(weapon) * attackStrength * fWeaponFatigueBlockMult;
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fatigue.setCurrent(fatigue.getCurrent() - fatigueLoss);
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blockerStats.setFatigue(fatigue);
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blockerStats.setBlock(true);
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if (blocker == getPlayer())
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blocker.getClass().skillUsageSucceeded(blocker, ESM::Skill::Block, 0);
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return true;
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}
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return false;
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}
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void resistNormalWeapon(const MWWorld::Ptr &actor, const MWWorld::Ptr& attacker, const MWWorld::Ptr &weapon, float &damage)
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{
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const MWMechanics::MagicEffects& effects = actor.getClass().getCreatureStats(actor).getMagicEffects();
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float resistance = std::min(100.f, effects.get(ESM::MagicEffect::ResistNormalWeapons).getMagnitude()
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- effects.get(ESM::MagicEffect::WeaknessToNormalWeapons).getMagnitude());
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float multiplier = 1.f - resistance / 100.f;
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if (!(weapon.get<ESM::Weapon>()->mBase->mData.mFlags & ESM::Weapon::Silver
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|| weapon.get<ESM::Weapon>()->mBase->mData.mFlags & ESM::Weapon::Magical))
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{
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if (weapon.getClass().getEnchantment(weapon).empty()
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|| !Settings::Manager::getBool("enchanted weapons are magical", "Game"))
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damage *= multiplier;
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}
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if ((weapon.get<ESM::Weapon>()->mBase->mData.mFlags & ESM::Weapon::Silver)
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&& actor.getClass().isNpc() && actor.getClass().getNpcStats(actor).isWerewolf())
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damage *= MWBase::Environment::get().getWorld()->getStore().get<ESM::GameSetting>().find("fWereWolfSilverWeaponDamageMult")->getFloat();
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if (damage == 0 && attacker == getPlayer())
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MWBase::Environment::get().getWindowManager()->messageBox("#{sMagicTargetResistsWeapons}");
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}
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void projectileHit(const MWWorld::Ptr& attacker, const MWWorld::Ptr& victim, MWWorld::Ptr weapon, const MWWorld::Ptr& projectile,
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const osg::Vec3f& hitPosition, float attackStrength)
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{
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MWBase::World *world = MWBase::Environment::get().getWorld();
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const MWWorld::Store<ESM::GameSetting> &gmst = world->getStore().get<ESM::GameSetting>();
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bool validVictim = !victim.isEmpty() && victim.getClass().isActor();
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float damage = 0.f;
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if (validVictim)
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{
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if (attacker == getPlayer())
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MWBase::Environment::get().getWindowManager()->setEnemy(victim);
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int weaponSkill = ESM::Skill::Marksman;
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if (!weapon.isEmpty())
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weaponSkill = weapon.getClass().getEquipmentSkill(weapon);
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int skillValue = attacker.getClass().getSkill(attacker, weapon.getClass().getEquipmentSkill(weapon));
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if (Misc::Rng::roll0to99() >= getHitChance(attacker, victim, skillValue))
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{
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victim.getClass().onHit(victim, damage, false, projectile, attacker, osg::Vec3f(), false);
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MWMechanics::reduceWeaponCondition(damage, false, weapon, attacker);
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return;
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}
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const unsigned char* attack = weapon.get<ESM::Weapon>()->mBase->mData.mChop;
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damage = attack[0] + ((attack[1] - attack[0]) * attackStrength); // Bow/crossbow damage
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// Arrow/bolt damage
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// NB in case of thrown weapons, we are applying the damage twice since projectile == weapon
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attack = projectile.get<ESM::Weapon>()->mBase->mData.mChop;
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damage += attack[0] + ((attack[1] - attack[0]) * attackStrength);
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adjustWeaponDamage(damage, weapon, attacker);
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if(attacker == getPlayer())
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attacker.getClass().skillUsageSucceeded(attacker, weaponSkill, 0);
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if (victim.getClass().getCreatureStats(victim).getKnockedDown())
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damage *= gmst.find("fCombatKODamageMult")->getFloat();
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}
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reduceWeaponCondition(damage, validVictim, weapon, attacker);
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// Apply "On hit" effect of the weapon & projectile
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bool appliedEnchantment = applyOnStrikeEnchantment(attacker, victim, weapon, hitPosition, true);
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if (weapon != projectile)
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appliedEnchantment = applyOnStrikeEnchantment(attacker, victim, projectile, hitPosition, true);
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if (validVictim)
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{
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// Non-enchanted arrows shot at enemies have a chance to turn up in their inventory
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if (victim != getPlayer() && !appliedEnchantment)
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{
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float fProjectileThrownStoreChance = gmst.find("fProjectileThrownStoreChance")->getFloat();
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if (Misc::Rng::rollProbability() < fProjectileThrownStoreChance / 100.f)
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victim.getClass().getContainerStore(victim).add(projectile, 1, victim);
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}
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victim.getClass().onHit(victim, damage, true, projectile, attacker, hitPosition, true);
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}
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}
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float getHitChance(const MWWorld::Ptr &attacker, const MWWorld::Ptr &victim, int skillValue)
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{
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MWMechanics::CreatureStats &stats = attacker.getClass().getCreatureStats(attacker);
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const MWMechanics::MagicEffects &mageffects = stats.getMagicEffects();
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MWBase::World *world = MWBase::Environment::get().getWorld();
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const MWWorld::Store<ESM::GameSetting> &gmst = world->getStore().get<ESM::GameSetting>();
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float defenseTerm = 0;
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MWMechanics::CreatureStats& victimStats = victim.getClass().getCreatureStats(victim);
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if (victimStats.getFatigue().getCurrent() >= 0)
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{
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// Maybe we should keep an aware state for actors updated every so often instead of testing every time
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bool unaware = (!victimStats.getAiSequence().isInCombat())
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&& (attacker == getPlayer())
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&& (!MWBase::Environment::get().getMechanicsManager()->awarenessCheck(attacker, victim));
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if (!(victimStats.getKnockedDown() ||
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victimStats.isParalyzed()
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|| unaware ))
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{
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defenseTerm = victimStats.getEvasion();
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}
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defenseTerm += std::min(100.f,
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gmst.find("fCombatInvisoMult")->getFloat() *
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victimStats.getMagicEffects().get(ESM::MagicEffect::Chameleon).getMagnitude());
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defenseTerm += std::min(100.f,
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gmst.find("fCombatInvisoMult")->getFloat() *
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victimStats.getMagicEffects().get(ESM::MagicEffect::Invisibility).getMagnitude());
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}
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float attackTerm = skillValue +
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(stats.getAttribute(ESM::Attribute::Agility).getModified() / 5.0f) +
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(stats.getAttribute(ESM::Attribute::Luck).getModified() / 10.0f);
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attackTerm *= stats.getFatigueTerm();
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attackTerm += mageffects.get(ESM::MagicEffect::FortifyAttack).getMagnitude() -
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mageffects.get(ESM::MagicEffect::Blind).getMagnitude();
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return round(attackTerm - defenseTerm);
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}
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void applyElementalShields(const MWWorld::Ptr &attacker, const MWWorld::Ptr &victim)
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{
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for (int i=0; i<3; ++i)
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{
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float magnitude = victim.getClass().getCreatureStats(victim).getMagicEffects().get(ESM::MagicEffect::FireShield+i).getMagnitude();
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if (!magnitude)
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continue;
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CreatureStats& attackerStats = attacker.getClass().getCreatureStats(attacker);
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float saveTerm = attacker.getClass().getSkill(attacker, ESM::Skill::Destruction)
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+ 0.2f * attackerStats.getAttribute(ESM::Attribute::Willpower).getModified()
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+ 0.1f * attackerStats.getAttribute(ESM::Attribute::Luck).getModified();
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float fatigueMax = attackerStats.getFatigue().getModified();
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float fatigueCurrent = attackerStats.getFatigue().getCurrent();
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float normalisedFatigue = floor(fatigueMax)==0 ? 1 : std::max (0.0f, (fatigueCurrent/fatigueMax));
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saveTerm *= 1.25f * normalisedFatigue;
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float x = std::max(0.f, saveTerm - Misc::Rng::roll0to99());
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int element = ESM::MagicEffect::FireDamage;
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if (i == 1)
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element = ESM::MagicEffect::ShockDamage;
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if (i == 2)
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element = ESM::MagicEffect::FrostDamage;
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float elementResistance = MWMechanics::getEffectResistanceAttribute(element, &attackerStats.getMagicEffects());
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x = std::min(100.f, x + elementResistance);
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static const float fElementalShieldMult = MWBase::Environment::get().getWorld()->getStore().get<ESM::GameSetting>().find("fElementalShieldMult")->getFloat();
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x = fElementalShieldMult * magnitude * (1.f - 0.01f * x);
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// Note swapped victim and attacker, since the attacker takes the damage here.
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x = scaleDamage(x, victim, attacker);
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MWMechanics::DynamicStat<float> health = attackerStats.getHealth();
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health.setCurrent(health.getCurrent() - x);
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attackerStats.setHealth(health);
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}
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}
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void reduceWeaponCondition(float damage, bool hit, MWWorld::Ptr &weapon, const MWWorld::Ptr &attacker)
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{
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if (weapon.isEmpty())
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return;
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if (!hit)
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damage = 0.f;
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const bool weaphashealth = weapon.getClass().hasItemHealth(weapon);
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if(weaphashealth)
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{
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int weaphealth = weapon.getClass().getItemHealth(weapon);
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bool godmode = attacker == MWMechanics::getPlayer() && MWBase::Environment::get().getWorld()->getGodModeState();
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// weapon condition does not degrade when godmode is on
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if (!godmode)
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{
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const float fWeaponDamageMult = MWBase::Environment::get().getWorld()->getStore().get<ESM::GameSetting>().find("fWeaponDamageMult")->getFloat();
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float x = std::max(1.f, fWeaponDamageMult * damage);
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weaphealth -= std::min(int(x), weaphealth);
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weapon.getCellRef().setCharge(weaphealth);
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}
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// Weapon broken? unequip it
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if (weaphealth == 0)
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weapon = *attacker.getClass().getInventoryStore(attacker).unequipItem(weapon, attacker);
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}
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}
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void adjustWeaponDamage(float &damage, const MWWorld::Ptr &weapon, const MWWorld::Ptr& attacker)
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{
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if (weapon.isEmpty())
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return;
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const bool weaphashealth = weapon.getClass().hasItemHealth(weapon);
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if(weaphashealth)
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{
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int weaphealth = weapon.getClass().getItemHealth(weapon);
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int weapmaxhealth = weapon.getClass().getItemMaxHealth(weapon);
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damage *= (float(weaphealth) / weapmaxhealth);
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}
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static const float fDamageStrengthBase = MWBase::Environment::get().getWorld()->getStore().get<ESM::GameSetting>()
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.find("fDamageStrengthBase")->getFloat();
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static const float fDamageStrengthMult = MWBase::Environment::get().getWorld()->getStore().get<ESM::GameSetting>()
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.find("fDamageStrengthMult")->getFloat();
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damage *= fDamageStrengthBase +
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(attacker.getClass().getCreatureStats(attacker).getAttribute(ESM::Attribute::Strength).getModified() * fDamageStrengthMult * 0.1f);
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}
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void getHandToHandDamage(const MWWorld::Ptr &attacker, const MWWorld::Ptr &victim, float &damage, bool &healthdmg, float attackStrength)
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{
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// Note: MCP contains an option to include Strength in hand-to-hand damage
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// calculations. Some mods recommend using it, so we may want to include an
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// option for it.
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const MWWorld::ESMStore& store = MWBase::Environment::get().getWorld()->getStore();
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float minstrike = store.get<ESM::GameSetting>().find("fMinHandToHandMult")->getFloat();
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float maxstrike = store.get<ESM::GameSetting>().find("fMaxHandToHandMult")->getFloat();
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damage = static_cast<float>(attacker.getClass().getSkill(attacker, ESM::Skill::HandToHand));
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damage *= minstrike + ((maxstrike-minstrike)*attackStrength);
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MWMechanics::CreatureStats& otherstats = victim.getClass().getCreatureStats(victim);
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healthdmg = otherstats.isParalyzed()
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|| otherstats.getKnockedDown();
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bool isWerewolf = (attacker.getClass().isNpc() && attacker.getClass().getNpcStats(attacker).isWerewolf());
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if(isWerewolf)
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{
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healthdmg = true;
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// GLOB instead of GMST because it gets updated during a quest
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damage *= MWBase::Environment::get().getWorld()->getGlobalFloat("werewolfclawmult");
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}
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if(healthdmg)
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damage *= store.get<ESM::GameSetting>().find("fHandtoHandHealthPer")->getFloat();
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MWBase::SoundManager *sndMgr = MWBase::Environment::get().getSoundManager();
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if(isWerewolf)
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{
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const ESM::Sound *sound = store.get<ESM::Sound>().searchRandom("WolfHit");
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if(sound)
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sndMgr->playSound3D(victim, sound->mId, 1.0f, 1.0f);
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}
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else
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sndMgr->playSound3D(victim, "Hand To Hand Hit", 1.0f, 1.0f);
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}
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void applyFatigueLoss(const MWWorld::Ptr &attacker, const MWWorld::Ptr &weapon, float attackStrength)
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{
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// somewhat of a guess, but using the weapon weight makes sense
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const MWWorld::Store<ESM::GameSetting>& store = MWBase::Environment::get().getWorld()->getStore().get<ESM::GameSetting>();
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const float fFatigueAttackBase = store.find("fFatigueAttackBase")->getFloat();
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const float fFatigueAttackMult = store.find("fFatigueAttackMult")->getFloat();
|
|
const float fWeaponFatigueMult = store.find("fWeaponFatigueMult")->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 = (pos1 - pos2).length();
|
|
|
|
static const int iFightDistanceBase = MWBase::Environment::get().getWorld()->getStore().get<ESM::GameSetting>().find(
|
|
"iFightDistanceBase")->getInt();
|
|
static const float fFightDistanceMultiplier = MWBase::Environment::get().getWorld()->getStore().get<ESM::GameSetting>().find(
|
|
"fFightDistanceMultiplier")->getFloat();
|
|
|
|
return (iFightDistanceBase - fFightDistanceMultiplier * d);
|
|
}
|
|
}
|