Directly apply On Target 'When Strikes' enchantments instead of launching a projectile (Fixes #3212)

apps/openmw/mwclass/creature.cpp

@@ -306,18 +306,7 @@ namespace MWClass
             }
 
             // Apply "On hit" enchanted weapons
-            std::string enchantmentName = !weapon.isEmpty() ? weapon.getClass().getEnchantment(weapon) : "";
-            if (!enchantmentName.empty())
-            {
-                const ESM::Enchantment* enchantment = MWBase::Environment::get().getWorld()->getStore().get<ESM::Enchantment>().find(
-                            enchantmentName);
-                if (enchantment->mData.mType == ESM::Enchantment::WhenStrikes)
-                {
-                    MWMechanics::CastSpell cast(ptr, victim);
-                    cast.mHitPosition = hitPosition;
-                    cast.cast(weapon);
-                }
-            }
+            MWMechanics::applyOnStrikeEnchantment(ptr, victim, weapon, hitPosition);
         }
         else if (isBipedal(ptr))
         {

apps/openmw/mwclass/npc.cpp

@@ -637,18 +637,7 @@ namespace MWClass
             damage *= store.find("fCombatKODamageMult")->getFloat();
 
         // Apply "On hit" enchanted weapons
-        std::string enchantmentName = !weapon.isEmpty() ? weapon.getClass().getEnchantment(weapon) : "";
-        if (!enchantmentName.empty())
-        {
-            const ESM::Enchantment* enchantment = MWBase::Environment::get().getWorld()->getStore().get<ESM::Enchantment>().find(
-                        enchantmentName);
-            if (enchantment->mData.mType == ESM::Enchantment::WhenStrikes)
-            {
-                MWMechanics::CastSpell cast(ptr, victim);
-                cast.mHitPosition = hitPosition;
-                cast.cast(weapon);
-            }
-        }
+        MWMechanics::applyOnStrikeEnchantment(ptr, victim, weapon, hitPosition);
 
         MWMechanics::applyElementalShields(ptr, victim);
 

apps/openmw/mwmechanics/combat.cpp

@@ -29,7 +29,12 @@ float signedAngleRadians (const osg::Vec3f& v1, const osg::Vec3f& v2, const osg:
     return std::atan2((normal * (v1 ^ v2)), (v1 * v2));
 }
 
-bool applyEnchantment (const MWWorld::Ptr& attacker, const MWWorld::Ptr& victim, const MWWorld::Ptr& object, const osg::Vec3f& hitPosition)
+}
+
+namespace MWMechanics
+{
+
+    bool applyOnStrikeEnchantment (const MWWorld::Ptr& attacker, const MWWorld::Ptr& victim, const MWWorld::Ptr& object, const osg::Vec3f& hitPosition)
     {
         std::string enchantmentName = !object.isEmpty() ? object.getClass().getEnchantment(object) : "";
         if (!enchantmentName.empty())
@@ -40,18 +45,13 @@ bool applyEnchantment (const MWWorld::Ptr& attacker, const MWWorld::Ptr& victim,
             {
                 MWMechanics::CastSpell cast(attacker, victim);
                 cast.mHitPosition = hitPosition;
-            cast.cast(object);
+                cast.cast(object, false);
                 return true;
             }
         }
         return false;
     }
 
-}
-
-namespace MWMechanics
-{
-
     bool blockMeleeAttack(const MWWorld::Ptr &attacker, const MWWorld::Ptr &blocker, const MWWorld::Ptr &weapon, float damage, float attackStrength)
     {
         if (!blocker.getClass().hasInventoryStore(blocker))
@@ -215,9 +215,9 @@ namespace MWMechanics
             damage *= gmst.find("fCombatKODamageMult")->getFloat();
 
         // Apply "On hit" effect of the weapon
-        bool appliedEnchantment = applyEnchantment(attacker, victim, weapon, hitPosition);
+        bool appliedEnchantment = applyOnStrikeEnchantment(attacker, victim, weapon, hitPosition);
         if (weapon != projectile)
-            appliedEnchantment = applyEnchantment(attacker, victim, projectile, hitPosition);
+            appliedEnchantment = applyOnStrikeEnchantment(attacker, victim, projectile, hitPosition);
 
         if (damage > 0)
             MWBase::Environment::get().getWorld()->spawnBloodEffect(victim, hitPosition);

apps/openmw/mwmechanics/combat.hpp

@@ -6,6 +6,8 @@
 namespace MWMechanics
 {
 
+bool applyOnStrikeEnchantment(const MWWorld::Ptr& attacker, const MWWorld::Ptr& victim, const MWWorld::Ptr& object, const osg::Vec3f& hitPosition);
+
 /// @return can we block the attack?
 bool blockMeleeAttack (const MWWorld::Ptr& attacker, const MWWorld::Ptr& blocker, const MWWorld::Ptr& weapon, float damage, float attackStrength);
 

apps/openmw/mwmechanics/spellcasting.cpp

@@ -687,7 +687,7 @@ namespace MWMechanics
         throw std::runtime_error("ID type cannot be casted");
     }
 
-    bool CastSpell::cast(const MWWorld::Ptr &item)
+    bool CastSpell::cast(const MWWorld::Ptr &item, bool launchProjectile)
     {
         std::string enchantmentName = item.getClass().getEnchantment(item);
         if (enchantmentName.empty())
@@ -754,6 +754,8 @@ namespace MWMechanics
             inflict(mTarget, mCaster, enchantment->mEffects, ESM::RT_Touch);
         }
 
+        if (launchProjectile)
+        {
             std::string projectileModel;
             std::string sound;
             float speed = 0;
@@ -763,6 +765,9 @@ namespace MWMechanics
                                                                    false, enchantment->mEffects, mCaster, mSourceName,
                                                                        // Not needed, enchantments can only be cast by actors
                                                                        osg::Vec3f(1,0,0));
+        }
+        else if (!mTarget.isEmpty())
+            inflict(mTarget, mCaster, enchantment->mEffects, ESM::RT_Target);
 
         return true;
     }

apps/openmw/mwmechanics/spellcasting.hpp

@@ -81,7 +81,8 @@ namespace MWMechanics
         bool cast (const ESM::Spell* spell);
 
         /// @note mCaster must be an actor
-        bool cast (const MWWorld::Ptr& item);
+        /// @param launchProjectile If set to false, "on target" effects are directly applied instead of being launched as projectile originating from the caster.
+        bool cast (const MWWorld::Ptr& item, bool launchProjectile=true);
 
         /// @note mCaster must be an NPC
         bool cast (const ESM::Ingredient* ingredient);