plenty of new things

Barotrauma/BarotraumaShared/SharedSource/Map/Gap.cs

@@ -5,6 +5,7 @@ using Microsoft.Xna.Framework;
 using System;
 using System.Collections.Generic;
 using System.Xml.Linq;
+using MoonSharp.Interpreter;
 
 namespace Barotrauma
 {
@@ -648,6 +649,13 @@ namespace Barotrauma
                 if (Math.Max(hull1.WorldSurface + hull1.WaveY[hull1.WaveY.Length - 1], hull2.WorldSurface + hull2.WaveY[0]) > WorldRect.Y) { return; }
             }
 
+#if SERVER
+            var should = GameMain.Lua.hook.Call("gapOxygenUpdate", new DynValue[] { UserData.Create(this), UserData.Create(hull1), UserData.Create(hull2) });
+
+            if (should != null && should.CastToBool())
+                return;
+#endif
+
             float totalOxygen = hull1.Oxygen + hull2.Oxygen;
             float totalVolume = (hull1.Volume + hull2.Volume);