Feature #1119: Implement Resistance/Weakness to normal weapons magic effect. Handle fWereWolfSilverWeaponDamageMult.

apps/openmw/mwclass/creature.cpp

@@ -359,6 +359,9 @@ namespace MWClass
                 ptr.getRefData().getLocals().setVarByInt(script, "onpchitme", 1);
         }
 
+        if (damage > 0.0f && !object.isEmpty())
+            MWMechanics::resistNormalWeapon(ptr, attacker, object, damage);
+
         if (damage > 0.f)
         {
             // Check for knockdown

apps/openmw/mwclass/npc.cpp

@@ -652,6 +652,9 @@ namespace MWClass
         if (!attacker.isEmpty())
             MWMechanics::diseaseContact(ptr, attacker);
 
+        if (damage > 0.0f && !object.isEmpty())
+            MWMechanics::resistNormalWeapon(ptr, attacker, object, damage);
+
         if(damage > 0.0f)
         {
             // 'ptr' is losing health. Play a 'hit' voiced dialog entry if not already saying

apps/openmw/mwmechanics/combat.cpp

@@ -5,12 +5,14 @@
 #include "../mwbase/environment.hpp"
 #include "../mwbase/world.hpp"
 
-#include "../mwmechanics/creaturestats.hpp"
+#include "../mwmechanics/npcstats.hpp"
 #include "../mwmechanics/movement.hpp"
 
 #include "../mwworld/class.hpp"
 #include "../mwworld/inventorystore.hpp"
 
+#include "../mwbase/windowmanager.hpp"
+
 namespace
 {
 
@@ -108,4 +110,28 @@ namespace MWMechanics
         return false;
     }
 
+    void resistNormalWeapon(const MWWorld::Ptr &actor, const MWWorld::Ptr& attacker, const MWWorld::Ptr &weapon, float &damage)
+    {
+        MWMechanics::CreatureStats& stats = actor.getClass().getCreatureStats(actor);
+        float resistance = std::min(100.f, stats.getMagicEffects().get(ESM::MagicEffect::ResistNormalWeapons).mMagnitude
+                - stats.getMagicEffects().get(ESM::MagicEffect::WeaknessToNormalWeapons).mMagnitude);
+
+        float multiplier = 0;
+        if (resistance >= 0)
+            multiplier = 1 - resistance / 100.f;
+        else
+            multiplier = -(resistance-100) / 100.f;
+
+        if (!(weapon.get<ESM::Weapon>()->mBase->mData.mFlags & ESM::Weapon::Silver
+              || weapon.get<ESM::Weapon>()->mBase->mData.mFlags & ESM::Weapon::Magical))
+            damage *= multiplier;
+
+        if (weapon.get<ESM::Weapon>()->mBase->mData.mFlags & ESM::Weapon::Silver
+                & actor.getClass().isNpc() && actor.getClass().getNpcStats(actor).isWerewolf())
+            damage *= MWBase::Environment::get().getWorld()->getStore().get<ESM::GameSetting>().find("fWereWolfSilverWeaponDamageMult")->getFloat();
+
+        if (damage == 0 && attacker.getRefData().getHandle() == "player")
+            MWBase::Environment::get().getWindowManager()->messageBox("#{sMagicTargetResistsWeapons}");
+    }
+
 }

apps/openmw/mwmechanics/combat.hpp

@@ -9,6 +9,8 @@ namespace MWMechanics
 /// @return can we block the attack?
 bool blockMeleeAttack (const MWWorld::Ptr& attacker, const MWWorld::Ptr& blocker, const MWWorld::Ptr& weapon, float damage);
 
+void resistNormalWeapon (const MWWorld::Ptr& actor, const MWWorld::Ptr& attacker, const MWWorld::Ptr& weapon, float& damage);
+
 }
 
 #endif