Core/Movement: Refresh collision height on shapeshifting

src/server/game/Entities/Player/Player.cpp

@@ -1657,7 +1657,7 @@ void Player::SetObjectScale(float scale)
     SetBoundingRadius(scale * DEFAULT_PLAYER_BOUNDING_RADIUS);
     SetCombatReach(scale * DEFAULT_PLAYER_COMBAT_REACH);
     if (IsInWorld())
-        SendMovementSetCollisionHeight(scale * GetCollisionHeight(IsMounted()));
+        SendMovementSetCollisionHeight(scale * GetCollisionHeight(IsMounted()), WorldPackets::Movement::UpdateCollisionHeightReason::Scale);
 }
 
 bool Player::IsImmunedToSpellEffect(SpellInfo const* spellInfo, uint32 index, Unit* caster) const
@@ -28194,7 +28194,7 @@ void Player::DeleteGarrison()
     }
 }
 
-void Player::SendMovementSetCollisionHeight(float height)
+void Player::SendMovementSetCollisionHeight(float height, WorldPackets::Movement::UpdateCollisionHeightReason reason)
 {
     WorldPackets::Movement::MoveSetCollisionHeight setCollisionHeight;
     setCollisionHeight.MoverGUID = GetGUID();
@@ -28203,7 +28203,7 @@ void Player::SendMovementSetCollisionHeight(float height)
     setCollisionHeight.Scale = GetObjectScale();
     setCollisionHeight.MountDisplayID = GetMountDisplayId();
     setCollisionHeight.ScaleDuration = m_unitData->ScaleDuration;
-    setCollisionHeight.Reason = WorldPackets::Movement::UPDATE_COLLISION_HEIGHT_MOUNT;
+    setCollisionHeight.Reason = reason;
     SendDirectMessage(setCollisionHeight.Write());
 
     WorldPackets::Movement::MoveUpdateCollisionHeight updateCollisionHeight;

src/server/game/Entities/Player/Player.h

@@ -104,6 +104,11 @@ namespace WorldPackets
     {
         struct CharacterCreateInfo;
     }
+
+    namespace Movement
+    {
+        enum class UpdateCollisionHeightReason : uint8;
+    }
 }
 
 typedef std::deque<Mail*> PlayerMails;
@@ -2387,7 +2392,7 @@ class TC_GAME_API Player : public Unit, public GridObject<Player>
 
         void ValidateMovementInfo(MovementInfo* mi);
 
-        void SendMovementSetCollisionHeight(float height);
+        void SendMovementSetCollisionHeight(float height, WorldPackets::Movement::UpdateCollisionHeightReason reason);
 
         bool CanFly() const override { return m_movementInfo.HasMovementFlag(MOVEMENTFLAG_CAN_FLY); }
 

src/server/game/Entities/Unit/Unit.cpp

@@ -7848,7 +7848,7 @@ void Unit::Mount(uint32 mount, uint32 VehicleId, uint32 creatureEntry)
             if (charm->GetTypeId() == TYPEID_UNIT)
                 charm->AddUnitFlag(UNIT_FLAG_STUNNED);
 
-        player->SendMovementSetCollisionHeight(player->GetCollisionHeight(true));
+        player->SendMovementSetCollisionHeight(player->GetCollisionHeight(true), WorldPackets::Movement::UpdateCollisionHeightReason::Mount);
     }
 
     RemoveAurasWithInterruptFlags(AURA_INTERRUPT_FLAG_MOUNT);
@@ -7863,7 +7863,7 @@ void Unit::Dismount()
     RemoveUnitFlag(UNIT_FLAG_MOUNT);
 
     if (Player* thisPlayer = ToPlayer())
-        thisPlayer->SendMovementSetCollisionHeight(thisPlayer->GetCollisionHeight(false));
+        thisPlayer->SendMovementSetCollisionHeight(thisPlayer->GetCollisionHeight(false), WorldPackets::Movement::UpdateCollisionHeightReason::Mount);
 
     // dismount as a vehicle
     if (GetTypeId() == TYPEID_PLAYER && GetVehicleKit())

src/server/game/Server/Packets/MovementPackets.h

@@ -487,11 +487,11 @@ namespace WorldPackets
             Optional<MoveKnockBackSpeeds> Speeds;
         };
 
-        enum UpdateCollisionHeightReason : uint8
+        enum class UpdateCollisionHeightReason : uint8
         {
-            UPDATE_COLLISION_HEIGHT_SCALE = 0,
-            UPDATE_COLLISION_HEIGHT_MOUNT = 1,
-            UPDATE_COLLISION_HEIGHT_FORCE = 2
+            Scale   = 0,
+            Mount   = 1,
+            Force   = 2
         };
 
         class MoveSetCollisionHeight final : public ServerPacket
@@ -504,7 +504,7 @@ namespace WorldPackets
             float Scale = 1.0f;
             ObjectGuid MoverGUID;
             uint32 MountDisplayID = 0;
-            UpdateCollisionHeightReason Reason = UPDATE_COLLISION_HEIGHT_MOUNT;
+            UpdateCollisionHeightReason Reason = UpdateCollisionHeightReason::Scale;
             uint32 SequenceIndex = 0;
             int32 ScaleDuration = 0;
             float Height = 1.0f;
@@ -530,7 +530,7 @@ namespace WorldPackets
             void Read() override;
 
             MovementAck Data;
-            UpdateCollisionHeightReason Reason = UPDATE_COLLISION_HEIGHT_MOUNT;
+            UpdateCollisionHeightReason Reason = UpdateCollisionHeightReason::Scale;
             uint32 MountDisplayID = 0;
             float Height = 1.0f;
         };
@@ -638,7 +638,7 @@ namespace WorldPackets
             {
                 float Height = 0.0f;
                 float Scale = 0.0f;
-                UpdateCollisionHeightReason Reason = UPDATE_COLLISION_HEIGHT_MOUNT;
+                UpdateCollisionHeightReason Reason = UpdateCollisionHeightReason::Scale;
             };
 
             struct KnockBackInfo

src/server/game/Spells/Auras/SpellAuraEffects.cpp

@@ -29,6 +29,7 @@
 #include "LootMgr.h"
 #include "MiscPackets.h"
 #include "MotionMaster.h"
+#include "MovementPackets.h"
 #include "ObjectAccessor.h"
 #include "ObjectMgr.h"
 #include "Opcodes.h"
@@ -1821,8 +1822,11 @@ void AuraEffect::HandleAuraModShapeshift(AuraApplication const* aurApp, uint8 mo
         HandleShapeshiftBoosts(target, false);
     }
 
-    if (target->GetTypeId() == TYPEID_PLAYER)
-        target->ToPlayer()->InitDataForForm();
+    if (Player* playerTarget = target->ToPlayer())
+    {
+        playerTarget->SendMovementSetCollisionHeight(playerTarget->GetCollisionHeight(false), WorldPackets::Movement::UpdateCollisionHeightReason::Force);
+        playerTarget->InitDataForForm();
+    }
     else
         target->UpdateDisplayPower();