Add Map.GetNamedActor for map actor lookup

OpenRA.Mods.RA/Scripting/LuaScriptInterface.cs

@@ -10,6 +10,7 @@
 
 using System;
 using System.Collections;
+using System.Collections.Generic;
 using System.Linq;
 using NLua;
 using OpenRA.Effects;
@@ -34,6 +35,7 @@ namespace OpenRA.Mods.RA.Scripting
 	public class LuaScriptInterface : IWorldLoaded, ITick
 	{
 		World world;
+		Dictionary<string, Actor> mapActors;
 		readonly LuaScriptContext context = new LuaScriptContext();
 		readonly LuaScriptInterfaceInfo info;
 
@@ -45,6 +47,7 @@ namespace OpenRA.Mods.RA.Scripting
 		public void WorldLoaded(World w, WorldRenderer wr)
 		{
 			world = w;
+			mapActors = world.WorldActor.Trait<SpawnMapActors>().Actors;
 
 			context.Lua["World"] = w;
 			context.Lua["WorldRenderer"] = wr;
@@ -72,7 +75,7 @@ namespace OpenRA.Mods.RA.Scripting
 
 		void AddMapActorGlobals()
 		{
-			foreach (var kv in world.WorldActor.Trait<SpawnMapActors>().Actors)
+			foreach (var kv in mapActors)
 			{
 				if (context.Lua[kv.Key] != null)
 					context.ShowErrorMessage("{0}: The global name '{1}' is reserved and may not be used by map actor {2}".F(GetType().Name, kv.Key, kv.Value), null);
@@ -315,5 +318,11 @@ namespace OpenRA.Mods.RA.Scripting
 		{
 			return world.ChooseRandomEdgeCell();
 		}
+
+		[LuaGlobal]
+		public Actor GetNamedActor(string actorName)
+		{
+			return mapActors[actorName];
+		}
 	}
 }

mods/common/lua/map.lua

@@ -12,6 +12,10 @@ Map.GetRandomEdgeCell = function()
 	return Internal.GetRandomEdgeCell()
 end
 
+Map.GetNamedActor = function(actorName)
+	return Internal.GetNamedActor(actorName)
+end
+
 CPos.New = function(x, y)
 	return OpenRA.New("CPos", { { x, "Int32" }, { y, "Int32" } })
 end

mods/ra/maps/allies-01-classic/mission.lua

@@ -72,7 +72,7 @@ end
 SendCruisers = function()
 	for i, cruiser in ipairs(Cruisers) do
 		local ca = Actor.Create(cruiser, { Owner = england, Location = SouthReinforcementsPoint.Location })
-		Actor.Move(ca, _G["CruiserPoint" .. i].Location)
+		Actor.Move(ca, Map.GetNamedActor("CruiserPoint" .. i).Location)
 	end
 end