Alias for wagon typesrelease-2.4.6

1 files changed, 18 insertions, 1 deletions

diff --git a/advtrains/wagons.lua b/advtrains/wagons.lua
index 14bb58a..536c8d4 100644
--- a/advtrains/wagons.lua
+++ b/advtrains/wagons.lua
@@ -13,7 +13,20 @@ local GETOFF_TP_DELAY = 0.5
 local IGNORE_WORLD = advtrains.IGNORE_WORLD
 
 advtrains.wagons = {}
-advtrains.wagon_prototypes = {}
+advtrains.wagon_alias = {}
+advtrains.wagon_prototypes = setmetatable({}, {
+	__index = function(t, k)
+		local rtn_val = rawget(t, k)
+		if rtn_val ~= nil then
+			return rtn_val
+		end
+		local alias = advtrains.wagon_alias[k]
+		if alias then
+			return rawget(t, alias)
+		end
+		return nil
+	end
+})
 advtrains.wagon_objects = {}
 
 local unload_wgn_range = advtrains.wagon_load_range + 32
@@ -1326,6 +1339,10 @@ function advtrains.get_wagon_prototype(data)
 	return wt, advtrains.wagon_prototypes[wt]
 end
 
+function advtrains.register_wagon_alias(src, dst)
+	advtrains.wagon_alias[src] = dst
+end
+
 function advtrains.standard_inventory_formspec(self, pname, invname)
 	--[[minetest.chat_send_player(pname, string.format("self=%s, pname=%s, invname=%s", self, pname, invname))
 	for k,v in pairs(self) do