Merge branch 'absorb47' into 'openmw-47'

Absorb spells per effect

See merge request OpenMW/openmw!1274

apps/openmw/mwmechanics/spellabsorption.cpp

@@ -44,14 +44,14 @@ namespace MWMechanics
         }
     };
 
-    bool absorbSpell (const std::string& spellId, const MWWorld::Ptr& caster, const MWWorld::Ptr& target)
+    int getAbsorbChance(const MWWorld::Ptr& caster, const MWWorld::Ptr& target)
     {
-        if (spellId.empty() || target.isEmpty() || caster == target || !target.getClass().isActor())
-            return false;
+        if(target.isEmpty() || caster == target || !target.getClass().isActor())
+            return 0;
 
         CreatureStats& stats = target.getClass().getCreatureStats(target);
         if (stats.getMagicEffects().get(ESM::MagicEffect::SpellAbsorption).getMagnitude() <= 0.f)
-            return false;
+            return 0;
 
         GetAbsorptionProbability check;
         stats.getActiveSpells().visitEffectSources(check);
@@ -59,9 +59,12 @@ namespace MWMechanics
         if (target.getClass().hasInventoryStore(target))
             target.getClass().getInventoryStore(target).visitEffectSources(check);
 
-        int chance = check.mProbability * 100;
-        if (Misc::Rng::roll0to99() >= chance)
-            return false;
+        return check.mProbability * 100;
+    }
+
+    void absorbSpell (const std::string& spellId, const MWWorld::Ptr& caster, const MWWorld::Ptr& target)
+    {
+        CreatureStats& stats = target.getClass().getCreatureStats(target);
 
         const auto& esmStore = MWBase::Environment::get().getWorld()->getStore();
         const ESM::Static* absorbStatic = esmStore.get<ESM::Static>().find("VFX_Absorb");
@@ -85,7 +88,6 @@ namespace MWMechanics
         DynamicStat<float> magicka = stats.getMagicka();
         magicka.setCurrent(magicka.getCurrent() + spellCost);
         stats.setMagicka(magicka);
-        return true;
     }
 
 }

apps/openmw/mwmechanics/spellabsorption.hpp

@@ -10,8 +10,9 @@ namespace MWWorld
 
 namespace MWMechanics
 {
-    // Try to absorb a spell based on the magnitude of every Spell Absorption effect source on the target.
-    bool absorbSpell(const std::string& spellId, const MWWorld::Ptr& caster, const MWWorld::Ptr& target);
+    void absorbSpell(const std::string& spellId, const MWWorld::Ptr& caster, const MWWorld::Ptr& target);
+    // Calculate the chance to absorb a spell based on the magnitude of every Spell Absorption effect source on the target.
+    int getAbsorbChance(const MWWorld::Ptr& caster, const MWWorld::Ptr& target);
 }
 
 #endif

apps/openmw/mwmechanics/spellcasting.cpp

@@ -119,8 +119,7 @@ namespace MWMechanics
                                          // throughout the iteration of this spell's 
                                          // effects, we display a "can't re-cast" message
 
-        // Try absorbing the spell. Some handling must still happen for absorbed effects.
-        bool absorbed = absorbSpell(mId, caster, target);
+        int absorbChance = getAbsorbChance(caster, target);
 
         int currentEffectIndex = 0;
         for (std::vector<ESM::ENAMstruct>::const_iterator effectIt (effects.mList.begin());
@@ -142,6 +141,13 @@ namespace MWMechanics
             }
             canCastAnEffect = true;
 
+            // Try absorbing the effect
+            if(absorbChance && Misc::Rng::roll0to99() < absorbChance)
+            {
+                absorbSpell(mId, caster, target);
+                continue;
+            }
+
             if (!checkEffectTarget(effectIt->mEffectID, target, caster, castByPlayer))
                 continue;
 
@@ -155,10 +161,6 @@ namespace MWMechanics
             if (target.getClass().isActor() && target != caster && !caster.isEmpty() && isHarmful)
                 target.getClass().onHit(target, 0.0f, true, MWWorld::Ptr(), caster, osg::Vec3f(), true);
 
-            // Avoid proceeding further for absorbed spells.
-            if (absorbed)
-                continue;
-
             // Reflect harmful effects
             if (!reflected && reflectEffect(*effectIt, magicEffect, caster, target, reflectedEffects))
                 continue;