Fixed entity IDs occasionally getting messed up due to the gaps and hulls created by docking ports. Clients would simply use the existing hulls and gaps when a network event for an already docked port is received, even though they may have been removed and replaced with ones with different IDs.

Barotrauma/BarotraumaShared/Source/Items/Components/DockingPort.cs

@@ -27,7 +27,7 @@ namespace Barotrauma.Items.Components
 
         private Joint joint;
 
-        private Hull[] hulls;
+        private readonly Hull[] hulls = new Hull[2];
         private ushort?[] hullIds;
 
         private Door door;
@@ -238,7 +238,7 @@ namespace Barotrauma.Items.Components
         {
             if (GameMain.Client != null && !isNetworkMessage) return;
 
-            if (dockingTarget==null)
+            if (dockingTarget == null)
             {
                 DebugConsole.ThrowError("Error - attempted to lock a docking port that's not connected to anything");
                 return;
@@ -267,6 +267,9 @@ namespace Barotrauma.Items.Components
                 item.CreateServerEvent(this);
             }
 
+            List<MapEntity> removedEntities = item.linkedTo.Where(e => e.Removed).ToList();
+            foreach (MapEntity removed in removedEntities) item.linkedTo.Remove(removed);
+            
             if (!item.linkedTo.Any(e => e is Hull) && !dockingTarget.item.linkedTo.Any(e => e is Hull))
             {
                 CreateHull();
@@ -377,7 +380,6 @@ namespace Barotrauma.Items.Components
             var hullRects = new Rectangle[] { item.WorldRect, dockingTarget.item.WorldRect };
             var subs = new Submarine[] { item.Submarine, dockingTarget.item.Submarine };
 
-            hulls = new Hull[2];
             bodies = new Body[4];
 
             if (dockingTarget.door != null)
@@ -406,6 +408,7 @@ namespace Barotrauma.Items.Components
                     hullRects[i].Location -= MathUtils.ToPoint((subs[i].WorldPosition - subs[i].HiddenSubPosition));
                     hulls[i] = new Hull(MapEntityPrefab.Find("Hull"), hullRects[i], subs[i]);
                     hulls[i].AddToGrid(subs[i]);
+                    if (hullIds[i] != null) hulls[i].ID = (ushort)hullIds[i];
 
                     for (int j = 0; j < 2; j++)
                     {
@@ -436,7 +439,6 @@ namespace Barotrauma.Items.Components
                     hullRects[i].Location -= MathUtils.ToPoint((subs[i].WorldPosition - subs[i].HiddenSubPosition));
                     hulls[i] = new Hull(MapEntityPrefab.Find("Hull"), hullRects[i], subs[i]);
                     hulls[i].AddToGrid(subs[i]);
-
                     if (hullIds[i] != null) hulls[i].ID = (ushort)hullIds[i];
                 }
 
@@ -560,13 +562,9 @@ namespace Barotrauma.Items.Components
                 GameMain.World.RemoveJoint(joint);
                 joint = null;
             }
-
+            
-            if (hulls != null)
+            hulls[0]?.Remove(); hulls[0] = null;
-            {
+            hulls[1]?.Remove(); hulls[1] = null;
-                hulls[0].Remove();
-                hulls[1].Remove();
-                hulls = null;
-            }
 
             if (gap != null)
             {
@@ -576,10 +574,9 @@ namespace Barotrauma.Items.Components
 
             hullIds[0] = null;
             hullIds[1] = null;
-
             gapId = null;
-            
+
-            if (bodies!=null)
+            if (bodies != null)
             {
                 foreach (Body body in bodies)
                 {
@@ -749,6 +746,21 @@ namespace Barotrauma.Items.Components
         {
             bool isDocked = msg.ReadBoolean();
 
+            for (int i = 0; i < 2; i++)
+            {
+                if (hulls[i] == null) continue;
+                item.linkedTo.Remove(hulls[i]);
+                hulls[i].Remove();
+                hulls[i] = null;
+            }
+
+            if (gap != null)
+            {
+                item.linkedTo.Remove(gap);
+                gap.Remove();
+                gap = null;
+            }
+
             if (isDocked)
             {
                 ushort dockingTargetID = msg.ReadUInt16();