Fix multiple track types not working simultaneously

Bug was caused by the drives_on table of every train and advtrains.all_tracktypes
sharing the same reference, which caused advtrains.all_tracktypes to become the
intersection of all train drives_on's in the world.
However, this did become empty, causing nothing to work anymore.

1 files changed, 9 insertions, 1 deletions

diff --git a/advtrains/tracks.lua b/advtrains/tracks.lua
index bfa95fe..1cbbc0b 100644
--- a/advtrains/tracks.lua
+++ b/advtrains/tracks.lua
@@ -408,11 +408,19 @@ end
 

 

 function advtrains.is_track_and_drives_on(nodename, drives_on_p)

+	local drives_on = drives_on_p

+	if not drives_on then drives_on = advtrains.all_tracktypes end

+	local hasentry = false

+	for _,_ in pairs(drives_on) do

+		hasentry=true

+	end

+	if not hasentry then drives_on = advtrains.all_tracktypes end

+	

 	if not minetest.registered_nodes[nodename] then

 		return false

 	end

 	local nodedef=minetest.registered_nodes[nodename]

-	for k,v in pairs(drives_on_p) do

+	for k,v in pairs(drives_on) do

 		if nodedef.groups["advtrains_track_"..k] then

 			return true

 		end