Optimization: FindHull spatial hashing, itemcomponent sounds in a dictionary, got rid of Item.Updated, rendering fixes, disposing shadow vertex buffers

Subsurface/Source/Map/Hull.cs

@@ -14,6 +14,7 @@ namespace Barotrauma
     class Hull : MapEntity
     {
         public static List<Hull> hullList = new List<Hull>();
+        private static EntityGrid entityGrid;
 
         public static bool EditWater, EditFire;
 
@@ -165,9 +166,21 @@ namespace Barotrauma
 
             Volume = 0.0f;
 
+
             InsertToList();
         }
 
+        public override void OnMapLoaded()
+        {
+
+            if (entityGrid == null)
+            {
+                entityGrid = new EntityGrid(Submarine.Borders, 200.0f);
+            }
+
+            entityGrid.InsertEntity(this);
+        }
+
         public override bool Contains(Vector2 position)
         {
             return (Submarine.RectContains(WorldRect, position) &&
@@ -210,6 +223,8 @@ namespace Barotrauma
 
             //renderer.Dispose();
 
+            entityGrid.RemoveEntity(this);
+
             hullList.Remove(this);
         }
 
@@ -481,10 +496,30 @@ namespace Barotrauma
         //returns the water block which contains the point (or null if it isn't inside any)
         public static Hull FindHull(Vector2 position, Hull guess = null, bool useWorldCoordinates = true)
         {
-            return FindHull(position, hullList, guess, useWorldCoordinates);
+            if (entityGrid == null) return null;
+
+            if (guess != null)
+            {
+                if (Submarine.RectContains(useWorldCoordinates ? guess.WorldRect : guess.rect, position)) return guess;
+            }
+
+            var entities = entityGrid.GetEntities(useWorldCoordinates ? position-Submarine.Loaded.Position : position);
+
+            foreach (Hull hull in entities)
+            {
+                if (Submarine.RectContains(useWorldCoordinates ? hull.WorldRect : hull.rect, position)) return hull;
+            }
+
+            return null;
         }
 
-        public static Hull FindHull(Vector2 position, List<Hull> hulls, Hull guess = null, bool useWorldCoordinates = true)
+        //returns the water block which contains the point (or null if it isn't inside any)
+        public static Hull FindHullOld(Vector2 position, Hull guess = null, bool useWorldCoordinates = true)
+        {
+            return FindHullOld(position, hullList, guess, useWorldCoordinates);
+        }
+
+        public static Hull FindHullOld(Vector2 position, List<Hull> hulls, Hull guess = null, bool useWorldCoordinates = true)
         {
             if (guess != null && hulls.Contains(guess))
             {