fix(Scripts/TempleOfAhnQiraj): Correct Dark Glare's radius (#13350)

data/sql/updates/pending_db_world/rev_1665274040139039300.sql

@@ -0,0 +1,4 @@
+--
+DELETE FROM `spell_script_names` WHERE `ScriptName` = 'spell_cthun_dark_glare';
+INSERT INTO `spell_script_names` (`spell_id`, `ScriptName`) VALUES
+(26029, 'spell_cthun_dark_glare');

src/server/scripts/Kalimdor/TempleOfAhnQiraj/boss_cthun.cpp

@@ -25,6 +25,7 @@ EndScriptData */
 #include "Player.h"
 #include "ScriptMgr.h"
 #include "ScriptedCreature.h"
+#include "SpellScript.h"
 #include "TaskScheduler.h"
 #include "temple_of_ahnqiraj.h"
 
@@ -273,6 +274,9 @@ struct boss_eye_of_cthun : public BossAI
                 me->InterruptNonMeleeSpells(false);
                 me->SetTarget(ObjectGuid::Empty);
 
+                //Freeze animation
+                DoCast(me, SPELL_FREEZE_ANIM, true);
+
                 _scheduler.Schedule(1s, [this](TaskContext /*task*/)
                 {
                     //Select random target for dark beam to start on
@@ -283,14 +287,9 @@ struct boss_eye_of_cthun : public BossAI
                         DarkGlareTick = 0;
                         ClockWise = RAND(true, false);
 
-                        me->SetTarget(target->GetGUID());
-
                         //Add red coloration to C'thun
                         DoCast(me, SPELL_RED_COLORATION, true);
 
-                        //Freeze animation
-                        DoCast(me, SPELL_FREEZE_ANIM, true);
-
                         me->StopMoving();
                         me->SetFacingToObject(target);
                         me->SetOrientation(DarkGlareAngle);
@@ -927,6 +926,22 @@ private:
     ObjectGuid _portalGUID;
 };
 
+class spell_cthun_dark_glare : public SpellScript
+{
+    PrepareSpellScript(spell_cthun_dark_glare);
+
+    void FilterTargets(std::list<WorldObject*>& targets)
+    {
+        Unit* caster = GetCaster();
+        targets.remove_if([caster](WorldObject const* target) { return !caster->HasInLine(target, 5.0f); });
+    }
+
+    void Register() override
+    {
+        OnObjectAreaTargetSelect += SpellObjectAreaTargetSelectFn(spell_cthun_dark_glare::FilterTargets, EFFECT_ALL, TARGET_UNIT_CONE_ENEMY_24);
+    }
+};
+
 // 4033 - At C'thun's stomach
 class at_cthun_stomach_exit : public AreaTriggerScript
 {
@@ -997,6 +1012,7 @@ void AddSC_boss_cthun()
     RegisterTempleOfAhnQirajCreatureAI(npc_claw_tentacle);
     RegisterTempleOfAhnQirajCreatureAI(npc_giant_claw_tentacle);
     RegisterTempleOfAhnQirajCreatureAI(npc_giant_eye_tentacle);
+    RegisterSpellScript(spell_cthun_dark_glare);
     new at_cthun_stomach_exit();
     new at_cthun_center();
 }