From d2edbdeeccb4edf8dcf1cd87dc13e8b7d4376ef6 Mon Sep 17 00:00:00 2001
From: hondacrx <prelude_20032002@yahoo.com>
Date: Thu, 1 Feb 2024 11:34:50 -0500
Subject: [PATCH] Core/MMaps: Implemented a way to enable/disable certain
 terrain types for movement on the entire map

Port From (https://github.com/TrinityCore/TrinityCore/commit/da0ba86694010fcb1adb5ed88cbc212dd4a33ab5)
---
 Source/Game/Maps/Map.cs                       | 21 +++++++++++++++----
 .../Game/Movement/Generators/PathGenerator.cs |  3 +++
 2 files changed, 20 insertions(+), 4 deletions(-)

diff --git a/Source/Game/Maps/Map.cs b/Source/Game/Maps/Map.cs
index 9ff32fbb3..84b6a487b 100644
--- a/Source/Game/Maps/Map.cs
+++ b/Source/Game/Maps/Map.cs
@@ -3211,6 +3211,17 @@ namespace Game.Maps
 
         public TerrainInfo GetTerrain() { return m_terrain; }
 
+        // custom PathGenerator include and exclude filter flags
+        // these modify what kind of terrain types are available in current instance
+        // for example this can be used to mark offmesh connections as enabled/disabled
+        public ushort GetForceEnabledNavMeshFilterFlags() { return m_forceEnabledNavMeshFilterFlags; }
+        public void SetForceEnabledNavMeshFilterFlag(ushort flag) { m_forceEnabledNavMeshFilterFlags |= flag; }
+        public void RemoveForceEnabledNavMeshFilterFlag(ushort flag) { m_forceEnabledNavMeshFilterFlags &= (ushort)~flag; }
+
+        public ushort GetForceDisabledNavMeshFilterFlags() { return m_forceDisabledNavMeshFilterFlags; }
+        public void SetForceDisabledNavMeshFilterFlag(ushort flag) { m_forceDisabledNavMeshFilterFlags |= flag; }
+        public void RemoveForceDisabledNavMeshFilterFlag(ushort flag) { m_forceDisabledNavMeshFilterFlags &= (ushort)~flag; }
+
         public uint GetInstanceId()
         {
             return i_InstanceId;
@@ -4672,6 +4683,8 @@ namespace Game.Maps
         protected List<WorldObject> m_activeNonPlayers = new();
         protected List<Player> m_activePlayers = new();
         TerrainInfo m_terrain;
+        ushort m_forceEnabledNavMeshFilterFlags;
+        ushort m_forceDisabledNavMeshFilterFlags;
 
         SortedMultiMap<long, ScriptAction> m_scriptSchedule = new();
 
@@ -4900,7 +4913,7 @@ namespace Game.Maps
         }
 
         public Group GetOwningGroup() { return i_owningGroupRef.GetTarget(); }
-        
+
         public void TrySetOwningGroup(Group group)
         {
             if (!i_owningGroupRef.IsValid())
@@ -4981,7 +4994,7 @@ namespace Game.Maps
                 SQLTransaction trans = new();
 
                 if (entries.IsInstanceIdBound())
-                    Global.InstanceLockMgr.UpdateSharedInstanceLock(trans, new InstanceLockUpdateEvent(GetInstanceId(), i_data.GetSaveData(), 
+                    Global.InstanceLockMgr.UpdateSharedInstanceLock(trans, new InstanceLockUpdateEvent(GetInstanceId(), i_data.GetSaveData(),
                         instanceCompletedEncounters, updateSaveDataEvent.DungeonEncounter, i_data.GetEntranceLocationForCompletedEncounters(instanceCompletedEncounters)));
 
                 foreach (var player in GetPlayers())
@@ -5017,7 +5030,7 @@ namespace Game.Maps
                 DB.Characters.CommitTransaction(trans);
             }
         }
-        
+
         public void UpdateInstanceLock(UpdateAdditionalSaveDataEvent updateSaveDataEvent)
         {
             if (i_instanceLock != null)
@@ -5208,7 +5221,7 @@ namespace Game.Maps
             MapDifficultyXConditionId = mapDifficultyXConditionId;
         }
     }
-    
+
     public struct ScriptAction
     {
         public ObjectGuid ownerGUID;
diff --git a/Source/Game/Movement/Generators/PathGenerator.cs b/Source/Game/Movement/Generators/PathGenerator.cs
index ef1c84188..7ad8587cf 100644
--- a/Source/Game/Movement/Generators/PathGenerator.cs
+++ b/Source/Game/Movement/Generators/PathGenerator.cs
@@ -868,6 +868,9 @@ namespace Game.Movement
 
         void UpdateFilter()
         {
+            _filter.setIncludeFlags((ushort)(_filter.getIncludeFlags() | _source.GetMap().GetForceEnabledNavMeshFilterFlags()));
+            _filter.setExcludeFlags((ushort)(_filter.getExcludeFlags() | _source.GetMap().GetForceDisabledNavMeshFilterFlags()));
+
             // allow creatures to cheat and use different movement types if they are moved
             // forcefully into terrain they can't normally move in
             Unit _sourceUnit = _source.ToUnit();