fix(Core/Spells): Implement spell_jump_distance (#25023)

Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>

data/sql/updates/pending_db_world/rev_1772885471981.sql

@@ -0,0 +1,11 @@
+--
+CREATE TABLE IF NOT EXISTS `spell_jump_distance` (
+  `ID` int unsigned NOT NULL COMMENT 'spell id',
+  `JumpDistance` float NOT NULL DEFAULT '0' COMMENT 'max hop distance in yards',
+  PRIMARY KEY (`ID`)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci COMMENT='Per-spell chain jump distance override';
+
+DELETE FROM `spell_jump_distance` WHERE `ID` IN (62131, 64390);
+INSERT INTO `spell_jump_distance` (`ID`, `JumpDistance`) VALUES
+(62131, 5.0),
+(64390, 5.0);

src/server/game/Spells/Spell.cpp

@@ -2126,6 +2126,10 @@ void Spell::SearchChainTargets(std::list<WorldObject*>& targets, uint32 chainTar
             break;
     }
 
+    // per-spell override from spell_jump_distance table
+    if (m_spellInfo->JumpDistance > 0.0f)
+        jumpRadius = m_spellInfo->JumpDistance;
+
     // chain lightning/heal spells and similar - allow to jump at larger distance and go out of los
     bool isBouncingFar = (m_spellInfo->HasAttribute(SPELL_ATTR4_BOUNCY_CHAIN_MISSILES)
                           || m_spellInfo->DmgClass == SPELL_DAMAGE_CLASS_NONE

src/server/game/Spells/SpellInfo.cpp

@@ -861,6 +861,7 @@ SpellInfo::SpellInfo(SpellEntry const* spellEntry)
     _isSpellValid = true;
     _isCritCapable = false;
     _requireCooldownInfo = false;
+    JumpDistance = 0.0f;
 }
 
 SpellInfo::~SpellInfo()

src/server/game/Spells/SpellInfo.h

@@ -401,6 +401,7 @@ public:
     bool _isSpellValid;
     bool _isCritCapable;
     bool _requireCooldownInfo;
+    float JumpDistance;
 
     SpellInfo(SpellEntry const* spellEntry);
     ~SpellInfo();

src/server/game/Spells/SpellMgr.cpp

@@ -2957,6 +2957,42 @@ void SpellMgr::LoadSpellSpecificAndAuraState()
     LOG_INFO("server.loading", " ");
 }
 
+void SpellMgr::LoadSpellJumpDistances()
+{
+    uint32 oldMSTime = getMSTime();
+
+    QueryResult result = WorldDatabase.Query("SELECT ID, JumpDistance FROM spell_jump_distance");
+
+    if (!result)
+    {
+        LOG_WARN("server.loading", ">> Loaded 0 spell jump distances. DB table `spell_jump_distance` is empty.");
+        LOG_INFO("server.loading", " ");
+        return;
+    }
+
+    uint32 count = 0;
+    do
+    {
+        Field const* fields = result->Fetch();
+
+        uint32 const spellId = fields[0].Get<uint32>();
+        float const jumpDistance = fields[1].Get<float>();
+
+        SpellInfo* spellInfo = _GetSpellInfo(spellId);
+        if (!spellInfo)
+        {
+            LOG_ERROR("sql.sql", "Table `spell_jump_distance` has wrong spell (spell_id: {}), ignored.", spellId);
+            continue;
+        }
+
+        spellInfo->JumpDistance = jumpDistance;
+        ++count;
+    } while (result->NextRow());
+
+    LOG_INFO("server.loading", ">> Loaded {} spell jump distances in {} ms", count, GetMSTimeDiffToNow(oldMSTime));
+    LOG_INFO("server.loading", " ");
+}
+
 void SpellMgr::LoadSpellInfoCustomAttributes()
 {
     uint32 const oldMSTime = getMSTime();

src/server/game/Spells/SpellMgr.h

@@ -778,6 +778,7 @@ public:
     void LoadSpellInfoCustomAttributes();
     void LoadSpellInfoCorrections();
     void LoadSpellSpecificAndAuraState();
+    void LoadSpellJumpDistances();
 
 private:
     SpellDifficultySearcherMap mSpellDifficultySearcherMap;

src/server/game/World/World.cpp

@@ -433,6 +433,9 @@ void World::SetInitialWorldSettings()
     LOG_INFO("server.loading", "Loading SpellInfo Custom Attributes...");
     sSpellMgr->LoadSpellInfoCustomAttributes();
 
+    LOG_INFO("server.loading", "Loading Spell Jump Distances...");
+    sSpellMgr->LoadSpellJumpDistances();
+
     LOG_INFO("server.loading", "Loading Player Totem models...");
     sObjectMgr->LoadPlayerTotemModels();