Core/AreaTriggers: Fix triggering of client areatriggers for some shapes

(cherry picked from commit b070e63fa867f7f25e73e9ef3aafbe18902a50e9)

# Conflicts:
#	sql/updates/auth/cata_classic/2024_05_27_00_hotfixes.sql

1 files changed, 21 insertions, 0 deletions

diff --git a/src/server/game/Globals/ObjectMgr.cpp b/src/server/game/Globals/ObjectMgr.cpp
index d7cb4e739bd..0ceb461def9 100644
--- a/src/server/game/Globals/ObjectMgr.cpp
+++ b/src/server/game/Globals/ObjectMgr.cpp
@@ -6772,6 +6772,27 @@ Quest const* ObjectMgr::GetQuestTemplate(uint32 quest_id) const
     return itr != _questTemplates.end() ? itr->second.get() : nullptr;
 }
 
+std::vector<Position> ObjectMgr::GetVerticesForAreaTrigger(AreaTriggerEntry const* areaTrigger) const
+{
+    std::vector<Position> vertices;
+    if (areaTrigger && areaTrigger->ShapeType == 3 /* Polygon */)
+    {
+        if (std::vector<DBCPosition3D> const* pathNodes = sDB2Manager.GetNodesForPath(areaTrigger->ShapeID))
+        {
+            vertices.resize(pathNodes->size());
+            std::transform(pathNodes->cbegin(), pathNodes->cend(), vertices.begin(), [](DBCPosition3D dbcPosition)
+            {
+                return Position(dbcPosition.X, dbcPosition.Y, dbcPosition.Z);
+            });
+        }
+
+        // Drop first node (areatrigger position)
+        vertices.erase(vertices.begin());
+    }
+
+    return vertices;
+}
+
 void ObjectMgr::LoadGraveyardZones()
 {
     uint32 oldMSTime = getMSTime();