From 855b8d6487128672f26d55349a9cb121e8c76696 Mon Sep 17 00:00:00 2001
From: cosmonaut <evan@moonside.games>
Date: Thu, 12 Oct 2023 12:46:25 -0700
Subject: [PATCH] PrepareTransferTo method to speed up transfers

---
 src/World.cs | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/src/World.cs b/src/World.cs
index a26f243..9c14ad4 100644
--- a/src/World.cs
+++ b/src/World.cs
@@ -145,6 +145,14 @@ namespace MoonTools.ECS
 
 		private Dictionary<int, int> WorldToTransferID = new Dictionary<int, int>();
 
+		/// <summary>
+		/// If you are using the World Transfer feature, call this once after your systems/filters have all been initialized.
+		/// </summary>
+		public void PrepareTransferTo(World other)
+		{
+			other.FilterStorage.CreateMissingStorages(FilterStorage);
+		}
+
 		// FIXME: there's probably a better way to handle Filters so they are not world-bound
 		public unsafe void Transfer(World other, Filter filter, Filter otherFilter)
 		{
@@ -152,10 +160,6 @@ namespace MoonTools.ECS
 			other.ComponentDepot.CreateMissingStorages(ComponentDepot);
 			other.RelationDepot.CreateMissingStorages(RelationDepot);
 
-			// FIXME: we could just do this once on startup
-			// Could have a PrepareTransfer method or something
-			other.FilterStorage.CreateMissingStorages(FilterStorage);
-
 			// destroy all entities matching the filter
 			foreach (var entity in otherFilter.Entities)
 			{