Core/Spells: Fixed spell effect value truncation when value is a large integer

3 files changed, 7 insertions, 3 deletions

diff --git a/src/server/game/Entities/Object/Object.cpp b/src/server/game/Entities/Object/Object.cpp
index cca7c5fe890..e833ae78f2c 100644
--- a/src/server/game/Entities/Object/Object.cpp
+++ b/src/server/game/Entities/Object/Object.cpp
@@ -2272,7 +2272,7 @@ float WorldObject::GetSpellMinRangeForTarget(Unit const* target, SpellInfo const
     return spellInfo->GetMinRange(!IsHostileTo(target));
 }
 
-float WorldObject::ApplyEffectModifiers(SpellInfo const* spellInfo, uint8 effIndex, float value) const
+double WorldObject::ApplyEffectModifiers(SpellInfo const* spellInfo, uint8 effIndex, double value) const
 {
     if (Player* modOwner = GetSpellModOwner())
     {
@@ -2294,6 +2294,8 @@ float WorldObject::ApplyEffectModifiers(SpellInfo const* spellInfo, uint8 effInd
             case EFFECT_4:
                 modOwner->ApplySpellMod(spellInfo, SpellModOp::PointsIndex4, value);
                 break;
+            default:
+                break;
         }
     }
     return value;
diff --git a/src/server/game/Entities/Object/Object.h b/src/server/game/Entities/Object/Object.h
index f409b13c626..6269bc1b975 100644
--- a/src/server/game/Entities/Object/Object.h
+++ b/src/server/game/Entities/Object/Object.h
@@ -599,7 +599,7 @@ class TC_GAME_API WorldObject : public Object, public WorldLocation
         float GetSpellMaxRangeForTarget(Unit const* target, SpellInfo const* spellInfo) const;
         float GetSpellMinRangeForTarget(Unit const* target, SpellInfo const* spellInfo) const;
 
-        float ApplyEffectModifiers(SpellInfo const* spellInfo, uint8 effIndex, float value) const;
+        double ApplyEffectModifiers(SpellInfo const* spellInfo, uint8 effIndex, double value) const;
         int32 CalcSpellDuration(SpellInfo const* spellInfo) const;
         int32 ModSpellDuration(SpellInfo const* spellInfo, WorldObject const* target, int32 duration, bool positive, uint32 effectMask) const;
         void ModSpellCastTime(SpellInfo const* spellInfo, int32& castTime, Spell* spell = nullptr) const;
diff --git a/src/server/game/Entities/Player/Player.cpp b/src/server/game/Entities/Player/Player.cpp
index e2cdadfb468..c49dc685bc0 100644
--- a/src/server/game/Entities/Player/Player.cpp
+++ b/src/server/game/Entities/Player/Player.cpp
@@ -21455,6 +21455,7 @@ void Player::GetSpellModValues(SpellInfo const* spellInfo, SpellModOp op, Spell*
 template TC_GAME_API void Player::GetSpellModValues(SpellInfo const* spellInfo, SpellModOp op, Spell* spell, int32 base, int32* flat, float* pct) const;
 template TC_GAME_API void Player::GetSpellModValues(SpellInfo const* spellInfo, SpellModOp op, Spell* spell, uint32 base, int32* flat, float* pct) const;
 template TC_GAME_API void Player::GetSpellModValues(SpellInfo const* spellInfo, SpellModOp op, Spell* spell, float base, int32* flat, float* pct) const;
+template TC_GAME_API void Player::GetSpellModValues(SpellInfo const* spellInfo, SpellModOp op, Spell* spell, double base, int32* flat, float* pct) const;
 
 template <class T>
 void Player::ApplySpellMod(SpellInfo const* spellInfo, SpellModOp op, T& basevalue, Spell* spell /*= nullptr*/) const
@@ -21464,12 +21465,13 @@ void Player::ApplySpellMod(SpellInfo const* spellInfo, SpellModOp op, T& baseval
 
     GetSpellModValues(spellInfo, op, spell, basevalue, &totalflat, &totalmul);
 
-    basevalue = T(float(basevalue + totalflat) * totalmul);
+    basevalue = T(double(basevalue + totalflat) * totalmul);
 }
 
 template TC_GAME_API void Player::ApplySpellMod(SpellInfo const* spellInfo, SpellModOp op, int32& basevalue, Spell* spell) const;
 template TC_GAME_API void Player::ApplySpellMod(SpellInfo const* spellInfo, SpellModOp op, uint32& basevalue, Spell* spell) const;
 template TC_GAME_API void Player::ApplySpellMod(SpellInfo const* spellInfo, SpellModOp op, float& basevalue, Spell* spell) const;
+template TC_GAME_API void Player::ApplySpellMod(SpellInfo const* spellInfo, SpellModOp op, double& basevalue, Spell* spell) const;
 
 void Player::AddSpellMod(SpellModifier* mod, bool apply)
 {