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371 lines
17 KiB
C++
371 lines
17 KiB
C++
#include "combat.hpp"
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#include <OgreSceneNode.h>
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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 "../mwmechanics/npcstats.hpp"
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#include "../mwmechanics/movement.hpp"
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#include "../mwmechanics/spellcasting.hpp"
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#include "../mwmechanics/difficultyscaling.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 "../mwbase/windowmanager.hpp"
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namespace
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{
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Ogre::Radian signedAngle(Ogre::Vector3 v1, Ogre::Vector3 v2, Ogre::Vector3 normal)
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{
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return Ogre::Math::ATan2(
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normal.dotProduct( v1.crossProduct(v2) ),
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v1.dotProduct(v2)
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);
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}
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void applyEnchantment (const MWWorld::Ptr& attacker, const MWWorld::Ptr& victim, const MWWorld::Ptr& object, const Ogre::Vector3& hitPosition)
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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);
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cast.mHitPosition = hitPosition;
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cast.cast(object);
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}
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}
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}
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}
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namespace MWMechanics
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{
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bool blockMeleeAttack(const MWWorld::Ptr &attacker, const MWWorld::Ptr &blocker, const MWWorld::Ptr &weapon, float damage)
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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.getMagicEffects().get(ESM::MagicEffect::Paralyze).getMagnitude() > 0)
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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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Ogre::Degree angle = signedAngle (Ogre::Vector3(attacker.getRefData().getPosition().pos) - Ogre::Vector3(blocker.getRefData().getPosition().pos),
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blocker.getRefData().getBaseNode()->getOrientation().yAxis(), Ogre::Vector3(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 (angle.valueDegrees() < gmst.find("fCombatBlockLeftAngle")->getFloat())
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return false;
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if (angle.valueDegrees() > 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) + 0.2 * blockerStats.getAttribute(ESM::Attribute::Agility).getModified()
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+ 0.1 * blockerStats.getAttribute(ESM::Attribute::Luck).getModified();
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float enemySwing = attackerStats.getAttackStrength();
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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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float attackerSkill = 0.f;
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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 + 0.2 * attackerStats.getAttribute(ESM::Attribute::Agility).getModified()
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+ 0.1 * 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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int roll = std::rand()/ (static_cast<double> (RAND_MAX) + 1) * 100; // [0, 99]
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if (roll < x)
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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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// 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) * attackerStats.getAttackStrength() * 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.getCellRef().getRefId() == "player")
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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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MWMechanics::CreatureStats& stats = actor.getClass().getCreatureStats(actor);
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float resistance = std::min(100.f, stats.getMagicEffects().get(ESM::MagicEffect::ResistNormalWeapons).getMagnitude()
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- stats.getMagicEffects().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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damage *= multiplier;
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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.getRefData().getHandle() == "player")
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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 Ogre::Vector3& hitPosition)
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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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MWMechanics::CreatureStats& attackerStats = attacker.getClass().getCreatureStats(attacker);
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if(victim.isEmpty() || !victim.getClass().isActor() || victim.getClass().getCreatureStats(victim).isDead())
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// Can't hit non-actors or dead actors
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{
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reduceWeaponCondition(0.f, false, weapon, attacker);
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return;
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}
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if(attacker.getRefData().getHandle() == "player")
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MWBase::Environment::get().getWindowManager()->setEnemy(victim);
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int weapskill = ESM::Skill::Marksman;
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if(!weapon.isEmpty())
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weapskill = weapon.getClass().getEquipmentSkill(weapon);
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float skillValue = attacker.getClass().getSkill(attacker,
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weapon.getClass().getEquipmentSkill(weapon));
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if((::rand()/(RAND_MAX+1.0)) > getHitChance(attacker, victim, skillValue)/100.0f)
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{
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victim.getClass().onHit(victim, 0.0f, false, projectile, attacker, false);
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MWMechanics::reduceWeaponCondition(0.f, false, weapon, attacker);
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return;
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}
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float fDamageStrengthBase = gmst.find("fDamageStrengthBase")->getFloat();
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float fDamageStrengthMult = gmst.find("fDamageStrengthMult")->getFloat();
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const unsigned char* attack = weapon.get<ESM::Weapon>()->mBase->mData.mChop;
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float damage = attack[0] + ((attack[1]-attack[0])*attackerStats.getAttackStrength()); // Bow/crossbow damage
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if (weapon != projectile)
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{
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// Arrow/bolt damage
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attack = projectile.get<ESM::Weapon>()->mBase->mData.mChop;
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damage += attack[0] + ((attack[1]-attack[0])*attackerStats.getAttackStrength());
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}
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damage *= fDamageStrengthBase +
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(attackerStats.getAttribute(ESM::Attribute::Strength).getModified() * fDamageStrengthMult * 0.1);
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adjustWeaponDamage(damage, weapon);
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reduceWeaponCondition(damage, true, weapon, attacker);
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if(attacker.getRefData().getHandle() == "player")
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attacker.getClass().skillUsageSucceeded(attacker, weapskill, 0);
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if (victim.getClass().getCreatureStats(victim).getKnockedDown())
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damage *= gmst.find("fCombatKODamageMult")->getFloat();
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// Apply "On hit" effect of the weapon
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applyEnchantment(attacker, victim, weapon, hitPosition);
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if (weapon != projectile)
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applyEnchantment(attacker, victim, projectile, hitPosition);
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if (damage > 0)
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MWBase::Environment::get().getWorld()->spawnBloodEffect(victim, hitPosition);
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// Arrows shot at enemies have a chance to turn up in their inventory
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if (victim != MWBase::Environment::get().getWorld()->getPlayerPtr())
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{
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float fProjectileThrownStoreChance = gmst.find("fProjectileThrownStoreChance")->getFloat();
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if ((::rand()/(RAND_MAX+1.0)) < 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, true);
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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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float hitchance = 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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hitchance *= stats.getFatigueTerm();
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hitchance += mageffects.get(ESM::MagicEffect::FortifyAttack).getMagnitude() -
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mageffects.get(ESM::MagicEffect::Blind).getMagnitude();
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hitchance -= victim.getClass().getCreatureStats(victim).getEvasion();
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return hitchance;
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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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int fatigueMax = attackerStats.getFatigue().getModified();
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int fatigueCurrent = attackerStats.getFatigue().getCurrent();
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float normalisedFatigue = fatigueMax==0 ? 1 : std::max (0.0f, static_cast<float> (fatigueCurrent)/fatigueMax);
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saveTerm *= 1.25f * normalisedFatigue;
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float roll = std::rand()/ (static_cast<double> (RAND_MAX) + 1) * 100; // [0, 99]
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float x = std::max(0.f, saveTerm - roll);
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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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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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// 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)
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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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}
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void getHandToHandDamage(const MWWorld::Ptr &attacker, const MWWorld::Ptr &victim, float &damage, bool &healthdmg)
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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 = attacker.getClass().getSkill(attacker, ESM::Skill::HandToHand);
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damage *= minstrike + ((maxstrike-minstrike)*attacker.getClass().getCreatureStats(attacker).getAttackStrength());
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MWMechanics::CreatureStats& otherstats = victim.getClass().getCreatureStats(victim);
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healthdmg = (otherstats.getMagicEffects().get(ESM::MagicEffect::Paralyze).getMagnitude() > 0)
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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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}
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