Core/PvP: Gameobject rotation in BGs and Wintergrasp.

- Add a workaround in BattleGround correcting for bad rotations in BG scripts
- Calculate rotation from rotation in Wintergrasp, this function hasn't a rotation parameter and should be added in the future.
- Also removed an ugly hardcode in Battlefield::SpawnGameObject

Closes #17711

src/server/game/Battlefield/Battlefield.cpp

@@ -795,18 +795,21 @@ Creature* Battlefield::SpawnCreature(uint32 entry, float x, float y, float z, fl
 GameObject* Battlefield::SpawnGameObject(uint32 entry, float x, float y, float z, float o)
 {
     // Get map object
-    Map* map = sMapMgr->CreateBaseMap(571); // *vomits*
+    Map* map = sMapMgr->CreateBaseMap(m_MapId);
     if (!map)
         return 0;
 
+    // Calculate rotation
+    G3D::Quat rot = G3D::Matrix3::fromEulerAnglesZYX(o, 0.f, 0.f);
+
     // Create gameobject
     GameObject* go = new GameObject;
-    if (!go->Create(map->GenerateLowGuid<HighGuid::GameObject>(), entry, map, PHASEMASK_NORMAL, Position(x, y, z, o), G3D::Quat(), 255, GO_STATE_READY))
+    if (!go->Create(map->GenerateLowGuid<HighGuid::GameObject>(), entry, map, PHASEMASK_NORMAL, Position(x, y, z, o), rot, 255, GO_STATE_READY))
     {
         TC_LOG_ERROR("bg.battlefield", "Battlefield::SpawnGameObject: Gameobject template %u could not be found in the database! Battlefield has not been created!", entry);
         TC_LOG_ERROR("bg.battlefield", "Battlefield::SpawnGameObject: Could not create gameobject template %u! Battlefield has not been created!", entry);
         delete go;
-        return NULL;
+        return nullptr;
     }
 
     // Add to world

src/server/game/Battlegrounds/Battleground.cpp

@@ -1442,12 +1442,22 @@ bool Battleground::AddObject(uint32 type, uint32 entry, float x, float y, float
     Map* map = FindBgMap();
     if (!map)
         return false;
+
+    G3D::Quat rot(rotation0, rotation1, rotation2, rotation3);
+    // Temporally add safety check for bad spawns and send log (object rotations need to be rechecked in sniff)
+    if (!rotation0 && !rotation1 && !rotation2 && !rotation3)
+    {
+        TC_LOG_DEBUG("bg.battleground", "Battleground::AddObject: gameoobject [entry: %u, object type: %u] for BG (map: %u) has zeroed rotation fields, "
+            "orientation used temporally, but please fix the spawn", entry, type, m_MapId);
+
+        rot = G3D::Matrix3::fromEulerAnglesZYX(o, 0.f, 0.f);
+    }
+
     // Must be created this way, adding to godatamap would add it to the base map of the instance
     // and when loading it (in go::LoadFromDB()), a new guid would be assigned to the object, and a new object would be created
     // So we must create it specific for this instance
     GameObject* go = new GameObject;
-    if (!go->Create(GetBgMap()->GenerateLowGuid<HighGuid::GameObject>(), entry, GetBgMap(),
+    if (!go->Create(GetBgMap()->GenerateLowGuid<HighGuid::GameObject>(), entry, GetBgMap(), PHASEMASK_NORMAL, Position(x, y, z, o), rot, 255, goState))
-        PHASEMASK_NORMAL, Position(x, y, z, o), G3D::Quat(rotation0, rotation1, rotation2, rotation3), 255, goState))
     {
         TC_LOG_ERROR("bg.battleground", "Battleground::AddObject: cannot create gameobject (entry: %u) for BG (map: %u, instance id: %u)!",
                 entry, m_MapId, m_InstanceID);