[3.3.5] Get zone/area IDs from vmap data in the liquid update (#19840)

* Add new method Map::getFullVMapDataForPosition to get area info and liquid info in a single vmap lookup
* Use this lookup in Map:: relocation methods to update m_areaId and m_zoneId fields on WorldObject
* Adjust GetZoneId/GetAreaId on WorldObject to always return these cached fields
* Clean up liquid state handling on Unit and Player
* Hand floor's Z coord up through GetFullTerrainStatusForPosition, use it to update a new field in WorldObject, and use that to feed a new GetFloorZ call on WorldObject.

Closes #16489

1 files changed, 31 insertions, 0 deletions

diff --git a/src/common/Collision/Management/VMapManager2.cpp b/src/common/Collision/Management/VMapManager2.cpp
index 9981f722456..33bf7338616 100644
--- a/src/common/Collision/Management/VMapManager2.cpp
+++ b/src/common/Collision/Management/VMapManager2.cpp
@@ -279,6 +279,37 @@ namespace VMAP
         return false;
     }
 
+    void VMapManager2::getAreaAndLiquidData(unsigned int mapId, float x, float y, float z, uint8 reqLiquidType, AreaAndLiquidData& data) const
+    {
+        if (IsVMAPDisabledForPtr(mapId, VMAP_DISABLE_LIQUIDSTATUS))
+        {
+            data.floorZ = z;
+            int32 adtId, rootId, groupId;
+            uint32 flags;
+            if (getAreaInfo(mapId, x, y, data.floorZ, flags, adtId, rootId, groupId))
+                data.areaInfo = boost::in_place(adtId, rootId, groupId, flags);
+            return;
+        }
+        InstanceTreeMap::const_iterator instanceTree = GetMapTree(mapId);
+        if (instanceTree != iInstanceMapTrees.end())
+        {
+            LocationInfo info;
+            Vector3 pos = convertPositionToInternalRep(x, y, z);
+            if (instanceTree->second->GetLocationInfo(pos, info))
+            {
+                data.floorZ = info.ground_Z;
+                uint32 liquidType = info.hitModel->GetLiquidType();
+                float liquidLevel;
+                if (!reqLiquidType || (GetLiquidFlagsPtr(liquidType) & reqLiquidType))
+                    if (info.hitInstance->GetLiquidLevel(pos, info, liquidLevel))
+                        data.liquidInfo = boost::in_place(liquidType, liquidLevel);
+                
+                if (!IsVMAPDisabledForPtr(mapId, VMAP_DISABLE_AREAFLAG))
+                    data.areaInfo = boost::in_place(info.hitInstance->adtId, info.rootId, info.hitModel->GetWmoID(), info.hitModel->GetMogpFlags());
+            }
+        }
+    }
+
     WorldModel* VMapManager2::acquireModelInstance(const std::string& basepath, const std::string& filename, uint32 flags/* Only used when creating the model */)
     {
         //! Critical section, thread safe access to iLoadedModelFiles