282 files changed, 1798 insertions, 912 deletions
diff --git a/Makefile b/Makefile
index 7300426..3f6193d 100644
--- a/Makefile
+++ b/Makefile
@@ -1,5 +1,4 @@
 tarball: clean
-#	tar czf advtrains.tar.gz textures/*.png models/*.b3d *.lua *.txt 
-	which zip && zip advtrains.zip textures/*.png models/*.b3d *.lua *.txt 
+	which zip && zip -r advtrains.zip advtrains
 clean:
-	rm -f advtrains.zip advtrains.tar.gz
+	rm -f advtrains.zip
diff --git a/advtrains.zip b/advtrains.zip
index a3dab82..3eafd1a 100644
--- a/advtrains.zip
+++ b/advtrains.zip
diff --git a/advtrains/advtrains.zip b/advtrains/advtrains.zip
new file mode 100644
index 0000000..a3dab82
--- /dev/null
+++ b/advtrains/advtrains.zip
diff --git a/advtrains/advtrains/api_doc.txt b/advtrains/advtrains/api_doc.txt
new file mode 100644
index 0000000..6b1aa2e
--- /dev/null
+++ b/advtrains/advtrains/api_doc.txt
@@ -0,0 +1,114 @@
+Advanced Trains [advtrains] API documentation
+--------
+To use the API, mods must depend on 'advtrains'.
+All boolean values in definition tables default to 'false' and can be omitted.
+### Wagons
+Wagons are registered using the function
+
+advtrains.register_wagon(name, prototype, description, inventory_image)
+- 'name' is the internal name of the wagon. It is registered inside the 'advtrains:' namespace.
+	Example: A wagon with name="engine_tgv" will be registered as "advtrains:engine_tgv".
+- 'prototype' is the lua entity prototype. The regular definition keys for luaentites apply. Additional required and optional properties see below. DO NOT define 'on_step', 'on_activate', 'on_punch', 'on_rightclick' and 'get_staticdata' since these will be overridden. Use 'custom_*' instead.
+- 'description' is the description of the inventory item that is used to place the wagon.
+- 'inventory_image' is the inventory image of said item.
+
+# Wagon prototype properties
+{
+	... all regular luaentity properties (mesh, textures, collisionbox a.s.o)...
+	drives_on = {default=true},
+	^- used to define the tracktypes (see below) that wagon can drive on. The tracktype identifiers are given as keys, similar to privileges)
+	max_speed = 10,
+	^- optional, default 10: defines the maximum speed this wagon can drive. The maximum speed of a train is determined by the wagon with the lowest max_speed value.
+	seats = {
+		{
+			name="Left front window",
+			^- display name of this seat
+			attach_offset={x=0, y=10, z=0},
+			^- this value is passed to 'set_attach'
+			view_offset={x=0, y=6, z=0},
+			^- player:set_eye_offset is called with this parameter.
+			driving_ctrl_access=false,
+			^- If the seat is a driver stand, and players sitting here should get access to the train's driving control.
+
+		},
+	},
+	^- contains zero or more seat definitions. A seat is a place where a player can be attached when getting on a wagon.
+	wagon_span=2,
+	^- How far this wagon extends from its base position. Is the half of the wagon length.
+	^- Used to determine in which distance the other wagons have to be positioned. Will require tweaking.
+	drops = {"default:steelblock 3"}
+	^- List of itemstrings what to drop when the wagon is destroyed
+	
+	has_inventory = false
+	^- If this wagon has an inventory. The inventory is saved with the wagon.
+	^- the following settings are ignored if not.
+	inventory_list_sizes = {
+		box=8*6,
+	},
+	^- List of assignments of type list_name=size.
+	^- For every entry, an inventory list is created with the specified size.
+	get_inventory_formspec = function(self, player_name)
+		return "<a formspec>"
+	end,
+	^- Function that should return the formspec to be displayed when <player> requests to open the wagon's inventory
+	^- Use "list[detached:advtrains_wgn_"..self.unique_id..";<list_name>;<X>,<Y>;<W>,<H>;<Start>]" to display a wagon's inventory list.
+
+	custom_on_step = function(self, dtime) end
+	^- optional: Execute custom code on every step
+	custom_on_activate = function(self, dtime_s) end
+	^- optional: Execute custom code on activate. Staticdata does not need to be saved and restored since all properties written in 'self' are preserved over unloads.
+	update_animation = function(self, velocity) end
+	^- optional: Function that is called whenever the train's velocity changes or every 2 seconds. Used to call 'self.object:update_animation()' if needed. 
+
+}
+
+# Notes on wagons
+
+- Every wagon has the field 'unique_id' which assigns each wagon a random id.
+- All properties written in the lua entity (self) are saved and restored automatically. Minetest's internal staticdata is only used to save the unique_id of the wagon, which serves as a key in an externally saved table.
+- Assuming Z Axis as the axis parallel to the tracks and Y Axis as the one pointing into the sky, wagon models should be dimensioned in a way that:
+	- their origin is centered in X and Z direction
+	- their origin lies 0.5 units above the bottom of the model
+	- the overall extent in X and Y direction is <=3 units
+- wagon_span is then the distance between the model origin and the Z axis extent.
+
+### Tracks
+Most modders will be satisfied with the built-in tracks. If cog railways, maglev trains and mine trains are added, it is necessary to understand the definition of tracks. Although the tracks API is there, explaining it would require more effort than me creating the wanted definitions myself. Contact me if you need to register your own rails using my registration functions.
+
+However, it is still possible to register single rails by understanding the node properties of rails.
+minetest.register_node(nodename, {
+	... usual node definition ...
+	groups = {
+		advtrains_track_<tracktype>=1
+		^- this group tells that the node is a track
+		not_blocking_trains=1,
+		^- this group tells that the node should not block trains although it's walkable.
+	},
+	connect1 = 0,
+	connect2 = 8,
+	^- These values tell the direction (horizontal) the rail ends are pointing to. 0 means +Z, then rotation values increase clockwise. For a translation of directions to positions see helpers.lua.
+	rely1=0,
+	rely2=0,
+	^- the Y height of the rail end 1/2. A value of >=1 means that the rail end points to the next y layer at rely-1 
+	railheight=0,
+	^- the height value of this rail that is saved in the path. usually the median of rely1 and rely2.
+
+	can_dig=function(pos)
+		return not advtrains.is_train_at_pos(pos)
+	end,
+	after_dig_node=function(pos)
+		advtrains.invalidate_all_paths()
+		advtrains.reset_trackdb_position(pos)
+	end,
+	after_place_node=function(pos)
+		advtrains.reset_trackdb_position(pos)
+	end,
+	^- the code in these 3 default minetest API functions is required for advtrains to work, however you can add your own code
+	
+	advtrains = {
+		on_train_enter=function(pos, train_id) end
+		^- called when a train enters the rail
+		on_train_leave=function(pos, train_id) end
+		^- called when a train leaves the rail
+	}
+})
+\ No newline at end of file
diff --git a/advtrains/advtrains/atc.lua b/advtrains/advtrains/atc.lua
new file mode 100644
index 0000000..2a4d226
--- /dev/null
+++ b/advtrains/advtrains/atc.lua
@@ -0,0 +1,274 @@
+--atc.lua
+--registers and controls the ATC system
+
+local atc={}
+-- ATC persistence table. advtrains.atc is created by init.lua when it loads the save file.
+atc.controllers = {}
+function atc.load_data(data)
+	atc.controllers = data and data.controllers or {}
+end
+function atc.save_data()
+	return atc.controllers
+end
+--contents: {command="...", arrowconn=0-15 where arrow points}
+
+--call from advtrains.detector subprogram
+
+function atc.trigger_controller_train_enter(pos, train_id)
+	atc.send_command(pos)
+end
+
+--general
+
+function atc.send_command(pos)
+	local pts=minetest.pos_to_string(pos)
+	if atc.controllers[pts] then
+		--atprint("Called send_command at "..pts)
+		local train_id = advtrains.detector.on_node[pts]
+		if train_id then
+			if advtrains.trains[train_id] then
+				--atprint("send_command inside if: "..sid(train_id))
+				atc.train_reset_command(train_id)
+				local arrowconn=atc.controllers[pts].arrowconn
+				local train=advtrains.trains[train_id]
+				for index, ppos in pairs(train.path) do
+					if vector.equals(advtrains.round_vector_floor_y(ppos), pos) then
+						advtrains.trains[train_id].atc_arrow =
+								vector.equals(
+										advtrains.dirCoordSet(pos, arrowconn),
+										advtrains.round_vector_floor_y(train.path[index+train.movedir])
+								)
+						advtrains.trains[train_id].atc_command=atc.controllers[pts].command
+						atprint("Sending ATC Command: "..atc.controllers[pts].command)
+					end
+				end
+			end
+		end
+	end
+	return false
+end
+
+function atc.train_reset_command(train_id)
+	advtrains.trains[train_id].atc_command=nil
+	advtrains.trains[train_id].atc_delay=0
+	advtrains.trains[train_id].atc_brake_target=nil
+	advtrains.trains[train_id].atc_wait_finish=nil
+	advtrains.trains[train_id].atc_arrow=nil
+end
+
+--nodes
+local idxtrans={static=1, mesecon=2, digiline=3}
+local apn_func=function(pos, node)
+	advtrains.ndb.update(pos, node)
+	local meta=minetest.get_meta(pos)
+	if meta then
+		meta:set_string("infotext", "ATC controller, unconfigured.")
+		meta:set_string("formspec", atc.get_atc_controller_formspec(pos, meta))
+	end
+end
+
+advtrains.register_tracks("default", {
+	nodename_prefix="advtrains:dtrack_atc",
+	texture_prefix="advtrains_dtrack_atc",
+	models_prefix="advtrains_dtrack_detector",
+	models_suffix=".b3d",
+	shared_texture="advtrains_dtrack_rail_atc.png",
+	description="ATC controller",
+	formats={},
+	get_additional_definiton = function(def, preset, suffix, rotation)
+		return {
+			after_place_node=apn_func,
+			after_dig_node=function(pos)
+				advtrains.invalidate_all_paths()
+				advtrains.ndb.clear(pos)
+				local pts=minetest.pos_to_string(pos)
+				atc.controllers[pts]=nil
+			end,
+			on_receive_fields = function(pos, formname, fields, player)
+				if minetest.is_protected(pos, player:get_player_name()) then
+					minetest.chat_send_player(player:get_player_name(), "This position is protected!")
+					return
+				end
+				local meta=minetest.get_meta(pos)
+				if meta then
+					if not fields.save then 
+						--maybe only the dropdown changed
+						if fields.mode then
+							meta:set_string("mode", idxtrans[fields.mode])
+							meta:set_string("infotext", "ATC controller, mode "..fields.mode.."\n"..( fields.mode=="digiline" and "Channel: "..meta:get_string("channel") or "Command: "..meta:get_string("command") ) )
+							meta:set_string("formspec", atc.get_atc_controller_formspec(pos, meta))
+						end
+						return
+					end
+					meta:set_string("mode", idxtrans[fields.mode])
+					meta:set_string("command", fields.command)
+					meta:set_string("command_on", fields.command_on)
+					meta:set_string("channel", fields.channel)
+					meta:set_string("infotext", "ATC controller, mode "..fields.mode.."\n"..( fields.mode=="digiline" and "Channel: "..meta:get_string("channel") or "Command: "..meta:get_string("command") ) )
+					meta:set_string("formspec", atc.get_atc_controller_formspec(pos, meta))
+					
+					local pts=minetest.pos_to_string(pos)
+					local _, conn1=advtrains.get_rail_info_at(pos, advtrains.all_tracktypes)
+					atc.controllers[pts]={command=fields.command, arrowconn=conn1}
+					atc.send_command(pos)
+				end
+			end,
+		}
+	end
+}, advtrains.trackpresets.t_30deg_straightonly)
+
+
+function atc.get_atc_controller_formspec(pos, meta)
+	local mode=tonumber(meta:get_string("mode")) or 1
+	local command=meta:get_string("command")
+	local command_on=meta:get_string("command_on")
+	local channel=meta:get_string("channel")
+	local formspec="size[8,6]"..
+		"dropdown[0,0;3;mode;static,mesecon,digiline;"..mode.."]"
+	if mode<3 then
+		formspec=formspec.."field[0.5,1.5;7,1;command;Command;"..minetest.formspec_escape(command).."]"
+		if tonumber(mode)==2 then
+			formspec=formspec.."field[0.5,3;7,1;command_on;Command (on);"..minetest.formspec_escape(command_on).."]"
+		end
+	else
+		formspec=formspec.."field[0.5,1.5;7,1;channel;Digiline channel;"..minetest.formspec_escape(channel).."]"
+	end
+	return formspec.."button_exit[0.5,4.5;7,1;save;Save]"
+end
+
+--from trainlogic.lua train step
+local matchptn={
+	["SM"]=function(id, train)
+		train.tarvelocity=train.max_speed
+		return 2
+	end,
+	["S([0-9]+)"]=function(id, train, match)
+		train.tarvelocity=tonumber(match)
+		return #match+1
+	end,
+	["B([0-9]+)"]=function(id, train, match)
+		if train.velocity>tonumber(match) then
+			train.atc_brake_target=tonumber(match)
+			if train.tarvelocity>train.atc_brake_target then
+				train.tarvelocity=train.atc_brake_target
+			end
+		end
+		return #match+1
+	end,
+	["W"]=function(id, train)
+		train.atc_wait_finish=true
+		return 1
+	end,
+	["D([0-9]+)"]=function(id, train, match)
+		train.atc_delay=tonumber(match)
+		return #match+1
+	end,
+	["R"]=function(id, train)
+		if train.velocity<=0 then
+			train.movedir=train.movedir*-1
+			train.atc_arrow = not train.atc_arrow
+		else
+			minetest.chat_send_all("ATC Reverse command warning: didn't reverse train!")
+		end
+		return 1
+	end,
+}
+
+function atc.execute_atc_command(id, train)
+	--strip whitespaces
+	local command=string.match(train.atc_command, "^%s*(.*)$")
+	
+	
+	if string.match(command, "^%s*$") then
+		train.atc_command=nil
+		return
+	end
+	--conditional statement?
+	local is_cond, cond_applies
+	local cond, rest=string.match(command, "^I([%+%-])(.+)$")
+	if cond then
+		is_cond=true
+		if cond=="+" then
+			cond_applies=train.atc_arrow
+		end
+		if cond=="-" then
+			cond_applies=not train.atc_arrow
+		end
+	else 
+		cond, compare, rest=string.match(command, "^I([<>]=?)([0-9]+)(.+)$")
+		if cond and compare then
+			is_cond=true
+			if cond=="<" then
+				cond_applies=train.velocity<tonumber(compare)
+			end
+			if cond==">" then
+				cond_applies=train.velocity>tonumber(compare)
+			end
+			if cond=="<=" then
+				cond_applies=train.velocity<=tonumber(compare)
+			end
+			if cond==">=" then
+				cond_applies=train.velocity>=tonumber(compare)
+			end
+		end
+	end	
+	if is_cond then
+		atprint("Evaluating if statement: "..command)
+		atprint("Cond: "..(cond or "nil"))
+		atprint("Applies: "..(cond_applies and "true" or "false"))
+		atprint("Rest: "..rest)
+		--find end of conditional statement
+		local nest, pos, elsepos=0, 1
+		while nest>=0 do
+			if pos>#rest then
+				minetest.chat_send_all("ATC command syntax error: I statement not closed: "..command)
+				atc.train_reset_command(id)
+				return
+			end
+			local char=string.sub(rest, pos, pos)
+			if char=="I" then
+				nest=nest+1
+			end
+			if char==";" then
+				nest=nest-1
+			end
+			if nest==0 and char=="E" then
+				elsepos=pos+0
+			end
+			pos=pos+1
+		end
+		if not elsepos then elsepos=pos-1 end
+		if cond_applies then
+			command=string.sub(rest, 1, elsepos-1)..string.sub(rest, pos)
+		else
+			command=string.sub(rest, elsepos+1, pos-2)..string.sub(rest, pos)
+		end
+		atprint("Result: "..command)
+		train.atc_command=command
+		atc.execute_atc_command(id, train)
+		return
+	else
+		for pattern, func in pairs(matchptn) do
+			local match=string.match(command, "^"..pattern)
+			if match then
+				local patlen=func(id, train, match)
+				
+				atprint("Executing: "..string.sub(command, 1, patlen))
+				
+				train.atc_command=string.sub(command, patlen+1)
+				if train.atc_delay<=0 and not train.atc_wait_finish then
+					--continue (recursive, cmds shouldn't get too long, and it's a end-recursion.)
+					atc.execute_atc_command(id, train)
+				end
+				return
+			end
+		end
+	end
+	minetest.chat_send_all("ATC command parse error: "..command)
+	atc.train_reset_command(id)
+end
+
+
+
+--move table to desired place
+advtrains.atc=atc
diff --git a/couple.lua b/advtrains/advtrains/couple.lua
index a846c8b..c0dea84 100644
--- a/couple.lua
+++ b/advtrains/advtrains/couple.lua
@@ -9,7 +9,6 @@ wagon
 
 wagons keep their couple entity minetest-internal id inside the field discouple_id. if it refers to nowhere, they will spawn a new one if player is near
 ]]
-local print=function(t, ...) minetest.log("action", table.concat({t, ...}, " ")) minetest.chat_send_all(table.concat({t, ...}, " ")) end
 
 
 minetest.register_entity("advtrains:discouple", {
@@ -32,7 +31,7 @@ minetest.register_entity("advtrains:discouple", {
 	on_punch=function(self, player)
 		--only if player owns at least one wagon next to this
 		local own=player:get_player_name()
-		if self.wagon.owner and self.wagon.owner~=own then
+		if self.wagon.owner and self.wagon.owner==own then
 			local train=advtrains.trains[self.wagon.train_id]
 			local nextwgn_id=train.trainparts[self.wagon.pos_in_trainparts-1]
 			for aoi, le in pairs(minetest.luaentities) do
@@ -45,8 +44,11 @@ minetest.register_entity("advtrains:discouple", {
 					end
 				end
 			end
+			advtrains.split_train_at_wagon(self.wagon)--found in trainlogic.lua
+			self.object:remove()
+		else
+			minetest.chat_send_player(own, "You need to own at least one neighboring wagon to destroy this couple.")
 		end
-		advtrains.split_train_at_wagon(self.wagon)--found in trainlogic.lua
 	end,
 	on_step=function(self, dtime)
 		local t=os.clock()
@@ -67,7 +69,7 @@ minetest.register_entity("advtrains:discouple", {
 			self.object:setvelocity(velocityvec)
 			self.updatepct_timer=2
 		end
-		printbm("discouple_step", t)
+		atprintbm("discouple_step", t)
 	end,
 })
 
@@ -120,7 +122,7 @@ minetest.register_entity("advtrains:couple", {
 	end,
 	on_step=function(self, dtime)
 		local t=os.clock()
-		if not self.train_id_1 or not self.train_id_2 then print("wtf no train ids?")return end
+		if not self.train_id_1 or not self.train_id_2 then atprint("wtf no train ids?")return end
 		local train1=advtrains.trains[self.train_id_1]
 		local train2=advtrains.trains[self.train_id_2]
 		if not train1 or not train2 or not train1.path or not train2.path or not train1.index or not train2.index then
@@ -140,7 +142,7 @@ minetest.register_entity("advtrains:couple", {
 		else
 			tp2=advtrains.get_real_index_position(train2.path, advtrains.get_train_end_index(train2))
 		end
-		if not tp1 or not tp2 or not (vector.distance(tp1,tp2)<0.5) then
+		if not tp1 or not tp2 or not (vector.distance(tp1,tp2)<1.5) then
 			self.object:remove()
 			return
 		else
@@ -149,6 +151,6 @@ minetest.register_entity("advtrains:couple", {
 				self.object:setpos(pos_median)
 			end
 		end
-		printbm("couple step", t)
+		atprintbm("couple step", t)
 	end,
 }) 
diff --git a/crafting.lua b/advtrains/advtrains/crafting.lua
index dd43512..5ba12ce 100644
--- a/crafting.lua
+++ b/advtrains/advtrains/crafting.lua
@@ -65,39 +65,7 @@ minetest.register_craft({
 	},
 })
 
---wagons
-minetest.register_craft({
-	output = 'advtrains:newlocomotive',
-	recipe = {
-		{'default:steelblock', 'default:steelblock', 'default:steelblock'},
-		{'default:steelblock', 'dye:black', 'default:steelblock'},
-		{'default:steelblock', 'default:steelblock', 'default:steelblock'},
-	},
-})
-minetest.register_craft({
-	output = 'advtrains:wagon_default',
-	recipe = {
-		{'default:steelblock', 'default:steelblock', 'default:steelblock'},
-		{'default:steelblock', 'dye:dark_green', 'default:steelblock'},
-		{'default:steelblock', 'default:steelblock', 'default:steelblock'},
-	},
-})
-minetest.register_craft({
-	output = 'advtrains:wagon_box',
-	recipe = {
-		{'default:steelblock', 'default:steelblock', 'default:steelblock'},
-		{'default:steelblock', 'default:junglewood', 'default:steelblock'},
-		{'default:steelblock', 'default:steelblock', 'default:steelblock'},
-	},
-})
-minetest.register_craft({
-	output = 'advtrains:subway_wagon',
-	recipe = {
-		{'default:steelblock', 'default:steelblock', 'default:steelblock'},
-		{'default:steelblock', 'dye:yellow', 'default:steelblock'},
-		{'default:steelblock', 'default:steelblock', 'default:steelblock'},
-	},
-})
+
 
 --misc_nodes
 --crafts for platforms see misc_nodes.lua
diff --git a/damage.lua b/advtrains/advtrains/damage.lua
index b39fe67..b39fe67 100644
--- a/damage.lua
+++ b/advtrains/advtrains/damage.lua
diff --git a/debugitems.lua b/advtrains/advtrains/debugitems.lua
index b3164ff..dcc95d9 100644
--- a/debugitems.lua
+++ b/advtrains/advtrains/debugitems.lua
@@ -24,13 +24,5 @@ minetest.register_tool("advtrains:tunnelborer",
 			end
 		end
 	end,
---[[
-^  default: nil
-^ Function must return either nil if no item shall be removed from
-inventory, or an itemstack to replace the original itemstack.
-e.g. itemstack:take_item(); return itemstack
-^ Otherwise, the function is free to do what it wants.
-^ The default functions handle regular use cases.
-]]
 }
-) 
+)
diff --git a/depends.txt b/advtrains/advtrains/depends.txt
index 20aa884..20aa884 100644
--- a/depends.txt
+++ b/advtrains/advtrains/depends.txt
diff --git a/description.txt b/advtrains/advtrains/description.txt
index ecc5d58..ecc5d58 100644
--- a/description.txt
+++ b/advtrains/advtrains/description.txt
diff --git a/helpers.lua b/advtrains/advtrains/helpers.lua
index 6a8175f..cc7deb8 100644
--- a/helpers.lua
+++ b/advtrains/advtrains/helpers.lua
@@ -1,5 +1,4 @@
 --advtrains by orwell96, see readme.txt
-local print=function(t) minetest.log("action", t) minetest.chat_send_all(t) end
 
 advtrains.dir_trans_tbl={
 	[0]={x=0, z=1},
@@ -55,34 +54,29 @@ rely1, rely2 tell to which height the connections are pointed to. 1 means it wil
 
 ]]
 
-function advtrains.conway(midreal, prev, traintype)--in order prev,mid,return
+function advtrains.conway(midreal, prev, drives_on)--in order prev,mid,return
 	local mid=advtrains.round_vector_floor_y(midreal)
-	local drives_on=advtrains.all_traintypes[traintype].drives_on
 	
-	if not advtrains.get_rail_info_at(advtrains.round_vector_floor_y(prev), traintype) then
-		return nil
-	end
-	
-	local midnode_ok, middir1, middir2, midrely1, midrely2=advtrains.get_rail_info_at(advtrains.round_vector_floor_y(mid), traintype)
+	local midnode_ok, middir1, middir2, midrely1, midrely2=advtrains.get_rail_info_at(mid, drives_on)
 	if not midnode_ok then
 		return nil 
 	end
 	
 	local next, chkdir, chkrely, y_offset
 	y_offset=0
-	--print("[advtrains] in order mid1,mid2",middir1,middir2)
+	--atprint(" in order mid1,mid2",middir1,middir2)
 	--try if it is dir1
 	local cor1=advtrains.dirCoordSet(mid, middir2)--<<<<
-	if math.floor(cor1.x+0.5)==math.floor(prev.x+0.5) and math.floor(cor1.z+0.5)==math.floor(prev.z+0.5) then--this was previous
+	if cor1.x==prev.x and cor1.z==prev.z then--this was previous
 		next=advtrains.dirCoordSet(mid, middir1)
 		if midrely1>=1 then
 			next.y=next.y+1
-			--print("[advtrains]found midrely1 to be >=1: next is now "..(next and minetest.pos_to_string(next) or "nil"))
+			--atprint("found midrely1 to be >=1: next is now "..(next and minetest.pos_to_string(next) or "nil"))
 			y_offset=1
 		end
 		chkdir=middir1
 		chkrely=midrely1
-		--print("[advtrains]dir2 applied next pos:",minetest.pos_to_string(next),"(chkdir is ",chkdir,")")
+		--atprint("dir2 applied next pos:",minetest.pos_to_string(next),"(chkdir is ",chkdir,")")
 	end
 	--dir2???
 	local cor2=advtrains.dirCoordSet(mid, middir1)--<<<<
@@ -90,54 +84,54 @@ function advtrains.conway(midreal, prev, traintype)--in order prev,mid,return
 		next=advtrains.dirCoordSet(mid, middir2)--dir2 wird �berpr�ft, alles gut.
 		if midrely2>=1 then
 			next.y=next.y+1
-			--print("[advtrains]found midrely2 to be >=1: next is now "..(next and minetest.pos_to_string(next) or "nil"))
+			--atprint("found midrely2 to be >=1: next is now "..(next and minetest.pos_to_string(next) or "nil"))
 			y_offset=1
 		end
 		chkdir=middir2
 		chkrely=midrely2
-		--print("[advtrains] dir2 applied next pos:",minetest.pos_to_string(next),"(chkdir is ",chkdir,")")
+		--atprint(" dir2 applied next pos:",minetest.pos_to_string(next),"(chkdir is ",chkdir,")")
 	end
-	--print("[advtrains]dir applied next pos: "..(next and minetest.pos_to_string(next) or "nil").."(chkdir is "..(chkdir or "nil")..", y-offset "..y_offset..")")
+	--atprint("dir applied next pos: "..(next and minetest.pos_to_string(next) or "nil").."(chkdir is "..(chkdir or "nil")..", y-offset "..y_offset..")")
 	--is there a next
 	if not next then
-		--print("[advtrains]in conway: no next rail(nil), returning!")
+		atprint("in conway: no next rail(nil), returning!")
 		return nil
 	end
 	
-	local nextnode_ok, nextdir1, nextdir2, nextrely1, nextrely2, nextrailheight=advtrains.get_rail_info_at(advtrains.round_vector_floor_y(next), traintype)
+	local nextnode_ok, nextdir1, nextdir2, nextrely1, nextrely2, nextrailheight=advtrains.get_rail_info_at(advtrains.round_vector_floor_y(next), drives_on)
 	
 	--is it a rail?
 	if(not nextnode_ok) then
-		--print("[advtrains]in conway: next "..minetest.pos_to_string(next).." not a rail, trying one node below!")
+		atprint("in conway: next "..minetest.pos_to_string(next).." not a rail, trying one node below!")
 		next.y=next.y-1
 		y_offset=y_offset-1
 		
-		nextnode_ok, nextdir1, nextdir2, nextrely1, nextrely2, nextrailheight=advtrains.get_rail_info_at(advtrains.round_vector_floor_y(next), traintype)
+		nextnode_ok, nextdir1, nextdir2, nextrely1, nextrely2, nextrailheight=advtrains.get_rail_info_at(advtrains.round_vector_floor_y(next), drives_on)
 		if(not nextnode_ok) then
-			--print("[advtrains]in conway: one below "..minetest.pos_to_string(next).." is not a rail either, returning!")
+			atprint("in conway: one below "..minetest.pos_to_string(next).." is not a rail either, returning!")
 			return nil
 		end
 	end
 	
 	--is this next rail connecting to the mid?
 	if not ( (((nextdir1+8)%16)==chkdir and nextrely1==chkrely-y_offset) or (((nextdir2+8)%16)==chkdir and nextrely2==chkrely-y_offset) ) then
-		--print("[advtrains]in conway: next "..minetest.pos_to_string(next).." not connecting, trying one node below!")
+		atprint("in conway: next "..minetest.pos_to_string(next).." not connecting, trying one node below!")
 		next.y=next.y-1
 		y_offset=y_offset-1
 		
-		nextnode_ok, nextdir1, nextdir2, nextrely1, nextrely2, nextrailheight=advtrains.get_rail_info_at(advtrains.round_vector_floor_y(next), traintype)
+		nextnode_ok, nextdir1, nextdir2, nextrely1, nextrely2, nextrailheight=advtrains.get_rail_info_at(advtrains.round_vector_floor_y(next), drives_on)
 		if(not nextnode_ok) then
-			--print("[advtrains]in conway: (at connecting if check again) one below "..minetest.pos_to_string(next).." is not a rail either, returning!")
+			atprint("in conway: (at connecting if check again) one below "..minetest.pos_to_string(next).." is not a rail either, returning!")
 			return nil
 		end
 		if not ( (((nextdir1+8)%16)==chkdir and nextrely1==chkrely) or (((nextdir2+8)%16)==chkdir and nextrely2==chkrely) ) then
-			--print("[advtrains]in conway: one below "..minetest.pos_to_string(next).." rail not connecting, returning!")
-			--print("[advtrains] in order mid1,2,next1,2,chkdir "..middir1.." "..middir2.." "..nextdir1.." "..nextdir2.." "..chkdir)
+			atprint("in conway: one below "..minetest.pos_to_string(next).." rail not connecting, returning!")
+			atprint(" in order mid1,2,next1,2,chkdir "..middir1.." "..middir2.." "..nextdir1.." "..nextdir2.." "..chkdir)
 			return nil
 		end
 	end
 	
-	--print("[advtrains]conway found rail.")
+	--atprint("conway found rail.")
 	return vector.add(advtrains.round_vector_floor_y(next), {x=0, y=nextrailheight, z=0}), chkdir
 end
 --TODO use this
@@ -177,10 +171,10 @@ function advtrains.minAngleDiffRad(r1, r2)
 	end
 end
 function advtrains.dumppath(path)
-	if not path then print("dumppath: no path(nil)") return end
+	if not path then atprint("dumppath: no path(nil)") return end
 	local min=advtrains.minN(path)
 	local max=advtrains.maxN(path)
-	for i=min, max do print("["..i.."] "..(path[i] and minetest.pos_to_string(path[i]) or "nil")) end
+	for i=min, max do atprint("["..i.."] "..(path[i] and minetest.pos_to_string(path[i]) or "nil")) end
 end
 
 function advtrains.merge_tables(a, ...)
@@ -192,18 +186,18 @@ function advtrains.merge_tables(a, ...)
 end
 function advtrains.yaw_from_3_positions(prev, curr, next)
 	local pts=minetest.pos_to_string
-	--print("p3 "..pts(prev)..pts(curr)..pts(next))
+	--atprint("p3 "..pts(prev)..pts(curr)..pts(next))
 	local prev2curr=math.atan2((curr.x-prev.x), (prev.z-curr.z))
 	local curr2next=math.atan2((next.x-curr.x), (curr.z-next.z))
-	--print("y3 "..(prev2curr*360/(2*math.pi)).." "..(curr2next*360/(2*math.pi)))
+	--atprint("y3 "..(prev2curr*360/(2*math.pi)).." "..(curr2next*360/(2*math.pi)))
 	return prev2curr+(advtrains.minAngleDiffRad(prev2curr, curr2next)/2)
 end
 function advtrains.get_wagon_yaw(front, first, second, back, pct)
 	local pts=minetest.pos_to_string
-	--print("p "..pts(front)..pts(first)..pts(second)..pts(back))
+	--atprint("p "..pts(front)..pts(first)..pts(second)..pts(back))
 	local y2=advtrains.yaw_from_3_positions(second, first, front)
 	local y1=advtrains.yaw_from_3_positions(back, second, first)
-	--print("y "..(y1*360/(2*math.pi)).." "..(y2*360/(2*math.pi)))
+	--atprint("y "..(y1*360/(2*math.pi)).." "..(y2*360/(2*math.pi)))
 	return y1+advtrains.minAngleDiffRad(y1, y2)*pct
 end
 function advtrains.get_real_index_position(path, index)
@@ -247,3 +241,4 @@ function advtrains.deserialize_inventory(sers, inv)
 	end
 	return false
 end
+
diff --git a/advtrains/advtrains/init.lua b/advtrains/advtrains/init.lua
new file mode 100644
index 0000000..c8c4b56
--- /dev/null
+++ b/advtrains/advtrains/init.lua
@@ -0,0 +1,180 @@
+--advtrains
+
+advtrains = {trains={}, wagon_save={}}
+
+advtrains.modpath = minetest.get_modpath("advtrains")
+
+local function print_concat_table(a)
+	local str=""
+	local stra=""
+	for i=1,50 do
+		t=a[i]
+		if t==nil then
+			stra=stra.."nil "
+		else
+			str=str..stra
+			stra=""
+			if type(t)=="table" then
+				if t.x and t.y and t.z then
+					str=str..minetest.pos_to_string(t)
+				else
+					str=str..dump(t)
+				end
+			elseif type(t)=="boolean" then
+				if t then
+					str=str.."true"
+				else
+					str=str.."false"
+				end
+			else
+				str=str..t
+			end
+			str=str.." "
+		end
+	end
+	return str
+end
+--atprint=function() end
+atprint=function(t, ...) minetest.log("action", "[advtrains]"..print_concat_table({t, ...})) minetest.chat_send_all("[advtrains]"..print_concat_table({t, ...})) end
+sid=function(id) return string.sub(id, -4) end
+
+dofile(advtrains.modpath.."/helpers.lua");
+dofile(advtrains.modpath.."/debugitems.lua");
+
+advtrains.meseconrules = 
+{{x=0,  y=0,  z=-1},
+ {x=1,  y=0,  z=0},
+ {x=-1, y=0,  z=0},
+ {x=0,  y=0,  z=1},
+ {x=1,  y=1,  z=0},
+ {x=1,  y=-1, z=0},
+ {x=-1, y=1,  z=0},
+ {x=-1, y=-1, z=0},
+ {x=0,  y=1,  z=1},
+ {x=0,  y=-1, z=1},
+ {x=0,  y=1,  z=-1},
+ {x=0,  y=-1, z=-1},
+ {x=0, y=-2, z=0}}
+ 
+dofile(advtrains.modpath.."/trainlogic.lua")
+dofile(advtrains.modpath.."/trainhud.lua")
+dofile(advtrains.modpath.."/trackplacer.lua")
+dofile(advtrains.modpath.."/tracks.lua")
+dofile(advtrains.modpath.."/atc.lua")
+dofile(advtrains.modpath.."/wagons.lua")
+
+dofile(advtrains.modpath.."/trackdb_legacy.lua")
+dofile(advtrains.modpath.."/nodedb.lua")
+dofile(advtrains.modpath.."/couple.lua")
+dofile(advtrains.modpath.."/damage.lua")
+
+dofile(advtrains.modpath.."/signals.lua")
+dofile(advtrains.modpath.."/misc_nodes.lua")
+dofile(advtrains.modpath.."/crafting.lua")
+
+--load/save
+
+advtrains.fpath=minetest.get_worldpath().."/advtrains"
+local file, err = io.open(advtrains.fpath, "r")
+if not file then
+	minetest.log("error", " Failed to read advtrains save data from file "..advtrains.fpath..": "..(err or "Unknown Error"))
+else
+	local tbl = minetest.deserialize(file:read("*a"))
+	if type(tbl) == "table" then
+		if tbl.version then
+			--congrats, we have the new save format.
+			advtrains.trains = tbl.trains
+			advtrains.wagon_save = tbl.wagon_save
+			advtrains.ndb.load_data(tbl.ndb)
+			advtrains.atc.load_data(tbl.atc)
+			--advtrains.latc.load_data(tbl.latc)
+		else
+			--oh no, its the old one...
+			advtrains.trains=tbl
+			--load ATC
+			advtrains.fpath_atc=minetest.get_worldpath().."/advtrains_atc"
+			local file, err = io.open(advtrains.fpath_atc, "r")
+			if not file then
+				local er=err or "Unknown Error"
+				atprint("Failed loading advtrains atc save file "..er)
+			else
+				local tbl = minetest.deserialize(file:read("*a"))
+				if type(tbl) == "table" then
+					advtrains.atc.controllers=tbl.controllers
+				end
+				file:close()
+			end
+			--load wagon saves
+			advtrains.fpath_ws=minetest.get_worldpath().."/advtrains_wagon_save"
+			local file, err = io.open(advtrains.fpath_ws, "r")
+			if not file then
+				local er=err or "Unknown Error"
+				atprint("Failed loading advtrains save file "..er)
+			else
+				local tbl = minetest.deserialize(file:read("*a"))
+				if type(tbl) == "table" then
+					advtrains.wagon_save=tbl
+				end
+				file:close()
+			end
+		end
+	else
+		minetest.log("error", " Failed to deserialize advtrains save data: Not a table!")
+	end
+	file:close()
+end
+
+advtrains.save = function()
+	--atprint("saving")
+	advtrains.invalidate_all_paths()
+	
+	-- update wagon saves
+	for _,wagon in pairs(minetest.luaentities) do
+		if wagon.is_wagon and wagon.initialized then
+			wagon:get_staticdata()
+		end
+	end
+	--cross out userdata
+	for w_id, data in pairs(advtrains.wagon_save) do
+		data.name=nil
+		data.object=nil
+		if data.driver then
+			data.driver_name=data.driver:get_player_name()
+			data.driver=nil
+		else
+			data.driver_name=nil
+		end
+		if data.discouple then
+			data.discouple.object:remove()
+			data.discouple=nil
+		end
+	end
+	
+	--versions:
+	-- 1 - Initial new save format.
+	local save_tbl={
+		trains = advtrains.trains,
+		wagon_save = advtrains.wagon_save,
+		atc = advtrains.atc.save_data(),
+		--latc = advtrains.latc.save_data(),
+		ndb = advtrains.ndb.save_data(),
+		version = 1,
+	}
+	local datastr = minetest.serialize(save_tbl)
+	if not datastr then
+		minetest.log("error", " Failed to serialize advtrains save data!")
+		return
+	end
+	local file, err = io.open(advtrains.fpath, "w")
+	if err then
+		minetest.log("error", " Failed to write advtrains save data to file "..advtrains.fpath..": "..(err or "Unknown Error"))
+		return
+	end
+	file:write(datastr)
+	file:close()
+end
+minetest.register_on_shutdown(advtrains.save)
+
+
+
+
diff --git a/advtrains/advtrains/lua_atc.lua b/advtrains/advtrains/lua_atc.lua
new file mode 100644
index 0000000..313d70d
--- /dev/null
+++ b/advtrains/advtrains/lua_atc.lua
@@ -0,0 +1,166 @@
+-------------
+--LUA ATC controllers
+
+local latc={}
+
+function latc.load_data(data)
+end
+function latc.save_data()
+	return stuff
+end
+
+latc.data
+latc.env_cdata
+latc.init_code=""
+latc.step_code=""
+
+advtrains.fpath_latc=minetest.get_worldpath().."/advtrains_latc"
+local file, err = io.open(advtrains.fpath_atc, "r")
+if not file then
+	local er=err or "Unknown Error"
+	atprint("Failed loading advtrains latc save file "..er)
+else
+	local tbl = minetest.deserialize(file:read("*a"))
+	if type(tbl) == "table" then
+		atc.controllers=tbl.controllers
+	end
+	file:close()
+end
+function latc.save()
+	
+	local datastr = minetest.serialize({controllers = atc.controllers})
+	if not datastr then
+		minetest.log("error", " Failed to serialize latc data!")
+		return
+	end
+	local file, err = io.open(advtrains.fpath_atc, "w")
+	if err then
+		return err
+	end
+	file:write(datastr)
+	file:close()
+end
+
+--Privilege
+--Only trusted players should be enabled to build stuff which can break the server.
+--If I later decide to have multiple environments ('data' tables), I better store an owner for every controller for future reference.
+
+minetest.register_privilege("advtrains_lua_atc", { description = "Player can place and modify LUA ATC components. Grant with care! Allows to execute bad LUA code.", give_to_singleplayer = false, default= false })
+
+--Environment
+--Code from mesecons_luacontroller (credit goes to Jeija and mesecons contributors)
+
+local safe_globals = {
+	"assert", "error", "ipairs", "next", "pairs", "select",
+	"tonumber", "tostring", "type", "unpack", "_VERSION"
+}
+local function safe_print(param)
+	print(dump(param))
+end
+
+local function safe_date()
+	return(os.date("*t",os.time()))
+end
+
+-- string.rep(str, n) with a high value for n can be used to DoS
+-- the server. Therefore, limit max. length of generated string.
+local function safe_string_rep(str, n)
+	if #str * n > mesecon.setting("luacontroller_string_rep_max", 64000) then
+		debug.sethook() -- Clear hook
+		error("string.rep: string length overflow", 2)
+	end
+
+	return string.rep(str, n)
+end
+
+-- string.find with a pattern can be used to DoS the server.
+-- Therefore, limit string.find to patternless matching.
+local function safe_string_find(...)
+	if (select(4, ...)) ~= true then
+		debug.sethook() -- Clear hook
+		error("string.find: 'plain' (fourth parameter) must always be true in a LuaController")
+	end
+
+	return string.find(...)
+end
+
+latc.static_env = {
+	print = safe_print,
+	string = {
+		byte = string.byte,
+		char = string.char,
+		format = string.format,
+		len = string.len,
+		lower = string.lower,
+		upper = string.upper,
+		rep = safe_string_rep,
+		reverse = string.reverse,
+		sub = string.sub,
+		find = safe_string_find,
+	},
+	math = {
+		abs = math.abs,
+		acos = math.acos,
+		asin = math.asin,
+		atan = math.atan,
+		atan2 = math.atan2,
+		ceil = math.ceil,
+		cos = math.cos,
+		cosh = math.cosh,
+		deg = math.deg,
+		exp = math.exp,
+		floor = math.floor,
+		fmod = math.fmod,
+		frexp = math.frexp,
+		huge = math.huge,
+		ldexp = math.ldexp,
+		log = math.log,
+		log10 = math.log10,
+		max = math.max,
+		min = math.min,
+		modf = math.modf,
+		pi = math.pi,
+		pow = math.pow,
+		rad = math.rad,
+		random = math.random,
+		sin = math.sin,
+		sinh = math.sinh,
+		sqrt = math.sqrt,
+		tan = math.tan,
+		tanh = math.tanh,
+	},
+	table = {
+		concat = table.concat,
+		insert = table.insert,
+		maxn = table.maxn,
+		remove = table.remove,
+		sort = table.sort,
+	},
+	os = {
+		clock = os.clock,
+		difftime = os.difftime,
+		time = os.time,
+		datetable = safe_date,
+	},
+}
+latc.static_env._G = env
+
+for _, name in pairs(safe_globals) do
+	latc.static_env[name] = _G[name]
+end
+
+
+--The environment all code calls get is a proxy table with a metatable.
+--When an index is read:
+-- Look in static_env
+-- Look in volatile_env (user_written functions and userdata)
+-- Look in saved_env (everything that's not a function or userdata)
+--when an index is written:
+-- If in static_env, do not allow
+-- if function or userdata, volatile_env
+-- if table, see below
+-- else, save in saved_env
+
+
+
+advtrains.latc=latc
diff --git a/misc_nodes.lua b/advtrains/advtrains/misc_nodes.lua
index 93829f0..70b18fb 100644
--- a/misc_nodes.lua
+++ b/advtrains/advtrains/misc_nodes.lua
@@ -3,7 +3,7 @@
 function advtrains.register_platform(preset)
 	local ndef=minetest.registered_nodes[preset]
 	if not ndef then 
-		minetest.log("warning", "[advtrains] register_platform couldn't find preset node "..preset)
+		minetest.log("warning", " register_platform couldn't find preset node "..preset)
 		return
 	end
 	local btex=ndef.tiles
diff --git a/models/advtrains_dtrack_bumper_st.b3d b/advtrains/advtrains/models/advtrains_dtrack_bumper_st.b3d
index a6d9745..a6d9745 100644
--- a/models/advtrains_dtrack_bumper_st.b3d
+++ b/advtrains/advtrains/models/advtrains_dtrack_bumper_st.b3d
diff --git a/models/advtrains_dtrack_bumper_st_30.b3d b/advtrains/advtrains/models/advtrains_dtrack_bumper_st_30.b3d
index 5f5b3f4..5f5b3f4 100644
--- a/models/advtrains_dtrack_bumper_st_30.b3d
+++ b/advtrains/advtrains/models/advtrains_dtrack_bumper_st_30.b3d
diff --git a/models/advtrains_dtrack_bumper_st_45.b3d b/advtrains/advtrains/models/advtrains_dtrack_bumper_st_45.b3d
index f13ae75..f13ae75 100644
--- a/models/advtrains_dtrack_bumper_st_45.b3d
+++ b/advtrains/advtrains/models/advtrains_dtrack_bumper_st_45.b3d
diff --git a/models/advtrains_dtrack_bumper_st_60.b3d b/advtrains/advtrains/models/advtrains_dtrack_bumper_st_60.b3d
index 59a2285..59a2285 100644
--- a/models/advtrains_dtrack_bumper_st_60.b3d
+++ b/advtrains/advtrains/models/advtrains_dtrack_bumper_st_60.b3d
diff --git a/models/advtrains_dtrack_cr.b3d b/advtrains/advtrains/models/advtrains_dtrack_cr.b3d
index 159717e..159717e 100644
--- a/models/advtrains_dtrack_cr.b3d
+++ b/advtrains/advtrains/models/advtrains_dtrack_cr.b3d
diff --git a/models/advtrains_dtrack_cr_30.b3d b/advtrains/advtrains/models/advtrains_dtrack_cr_30.b3d
index 09cdb1f..09cdb1f 100644
--- a/models/advtrains_dtrack_cr_30.b3d
+++ b/advtrains/advtrains/models/advtrains_dtrack_cr_30.b3d
diff --git a/models/advtrains_dtrack_cr_45.b3d b/advtrains/advtrains/models/advtrains_dtrack_cr_45.b3d
index 176da81..176da81 100644
--- a/models/advtrains_dtrack_cr_45.b3d
+++ b/advtrains/advtrains/models/advtrains_dtrack_cr_45.b3d
diff --git a/models/advtrains_dtrack_cr_60.b3d b/advtrains/advtrains/models/advtrains_dtrack_cr_60.b3d
index 00313c8..00313c8 100644
--- a/models/advtrains_dtrack_cr_60.b3d
+++ b/advtrains/advtrains/models/advtrains_dtrack_cr_60.b3d
diff --git a/models/advtrains_dtrack_detector_st.b3d b/advtrains/advtrains/models/advtrains_dtrack_detector_st.b3d
index 893c8cd..6762bc3 100644
--- a/models/advtrains_dtrack_detector_st.b3d
+++ b/advtrains/advtrains/models/advtrains_dtrack_detector_st.b3d
diff --git a/models/advtrains_dtrack_detector_st_30.b3d b/advtrains/advtrains/models/advtrains_dtrack_detector_st_30.b3d
index 2e59e93..f2d5991 100644
--- a/models/advtrains_dtrack_detector_st_30.b3d
+++ b/advtrains/advtrains/models/advtrains_dtrack_detector_st_30.b3d
diff --git a/models/advtrains_dtrack_detector_st_45.b3d b/advtrains/advtrains/models/advtrains_dtrack_detector_st_45.b3d
index c73166f..9ecb4a6 100644
--- a/models/advtrains_dtrack_detector_st_45.b3d
+++ b/advtrains/advtrains/models/advtrains_dtrack_detector_st_45.b3d
diff --git a/models/advtrains_dtrack_detector_st_60.b3d b/advtrains/advtrains/models/advtrains_dtrack_detector_st_60.b3d
index b6bc9af..bd102cb 100644
--- a/models/advtrains_dtrack_detector_st_60.b3d
+++ b/advtrains/advtrains/models/advtrains_dtrack_detector_st_60.b3d
diff --git a/models/advtrains_dtrack_st.b3d b/advtrains/advtrains/models/advtrains_dtrack_st.b3d
index f3e2753..f3e2753 100644
--- a/models/advtrains_dtrack_st.b3d
+++ b/advtrains/advtrains/models/advtrains_dtrack_st.b3d
diff --git a/models/advtrains_dtrack_st_30.b3d b/advtrains/advtrains/models/advtrains_dtrack_st_30.b3d
index 7a35c8d..7a35c8d 100644
--- a/models/advtrains_dtrack_st_30.b3d
+++ b/advtrains/advtrains/models/advtrains_dtrack_st_30.b3d
diff --git a/models/advtrains_dtrack_st_45.b3d b/advtrains/advtrains/models/advtrains_dtrack_st_45.b3d
index b2a1702..b2a1702 100644
--- a/models/advtrains_dtrack_st_45.b3d
+++ b/advtrains/advtrains/models/advtrains_dtrack_st_45.b3d
diff --git a/models/advtrains_dtrack_st_60.b3d b/advtrains/advtrains/models/advtrains_dtrack_st_60.b3d
index 0a59f77..0a59f77 100644
--- a/models/advtrains_dtrack_st_60.b3d
+++ b/advtrains/advtrains/models/advtrains_dtrack_st_60.b3d
diff --git a/models/advtrains_dtrack_swlcr.b3d b/advtrains/advtrains/models/advtrains_dtrack_swlcr.b3d
index 1adc23f..1adc23f 100644
--- a/models/advtrains_dtrack_swlcr.b3d
+++ b/advtrains/advtrains/models/advtrains_dtrack_swlcr.b3d
diff --git a/models/advtrains_dtrack_swlcr_30.b3d b/advtrains/advtrains/models/advtrains_dtrack_swlcr_30.b3d
index 7d8373b..7d8373b 100644
--- a/models/advtrains_dtrack_swlcr_30.b3d
+++ b/advtrains/advtrains/models/advtrains_dtrack_swlcr_30.b3d
diff --git a/models/advtrains_dtrack_swlcr_45.b3d b/advtrains/advtrains/models/advtrains_dtrack_swlcr_45.b3d
index 9679b9e..9679b9e 100644
--- a/models/advtrains_dtrack_swlcr_45.b3d
+++ b/advtrains/advtrains/models/advtrains_dtrack_swlcr_45.b3d
diff --git a/models/advtrains_dtrack_swlcr_60.b3d b/advtrains/advtrains/models/advtrains_dtrack_swlcr_60.b3d
index 3efc924..3efc924 100644
--- a/models/advtrains_dtrack_swlcr_60.b3d
+++ b/advtrains/advtrains/models/advtrains_dtrack_swlcr_60.b3d
diff --git a/models/advtrains_dtrack_swlst.b3d b/advtrains/advtrains/models/advtrains_dtrack_swlst.b3d
index 93841a4..93841a4 100644
--- a/models/advtrains_dtrack_swlst.b3d
+++ b/advtrains/advtrains/models/advtrains_dtrack_swlst.b3d
diff --git a/models/advtrains_dtrack_swlst_30.b3d b/advtrains/advtrains/models/advtrains_dtrack_swlst_30.b3d
index e9a90c7..e9a90c7 100644
--- a/models/advtrains_dtrack_swlst_30.b3d
+++ b/advtrains/advtrains/models/advtrains_dtrack_swlst_30.b3d
diff --git a/models/advtrains_dtrack_swlst_45.b3d b/advtrains/advtrains/models/advtrains_dtrack_swlst_45.b3d
index 49c707c..49c707c 100644
--- a/models/advtrains_dtrack_swlst_45.b3d
+++ b/advtrains/advtrains/models/advtrains_dtrack_swlst_45.b3d
diff --git a/models/advtrains_dtrack_swlst_60.b3d b/advtrains/advtrains/models/advtrains_dtrack_swlst_60.b3d
index c9a6ffe..c9a6ffe 100644
--- a/models/advtrains_dtrack_swlst_60.b3d
+++ b/advtrains/advtrains/models/advtrains_dtrack_swlst_60.b3d
diff --git a/models/advtrains_dtrack_swrcr.b3d b/advtrains/advtrains/models/advtrains_dtrack_swrcr.b3d
index ee29b62..ee29b62 100644
--- a/models/advtrains_dtrack_swrcr.b3d
+++ b/advtrains/advtrains/models/advtrains_dtrack_swrcr.b3d
diff --git a/models/advtrains_dtrack_swrcr_30.b3d b/advtrains/advtrains/models/advtrains_dtrack_swrcr_30.b3d
index ba065e1..ba065e1 100644
--- a/models/advtrains_dtrack_swrcr_30.b3d
+++ b/advtrains/advtrains/models/advtrains_dtrack_swrcr_30.b3d
diff --git a/models/advtrains_dtrack_swrcr_45.b3d b/advtrains/advtrains/models/advtrains_dtrack_swrcr_45.b3d
index 7f9dc43..7f9dc43 100644
--- a/models/advtrains_dtrack_swrcr_45.b3d
+++ b/advtrains/advtrains/models/advtrains_dtrack_swrcr_45.b3d
diff --git a/models/advtrains_dtrack_swrcr_60.b3d b/advtrains/advtrains/models/advtrains_dtrack_swrcr_60.b3d
index b8ffa61..b8ffa61 100644
--- a/models/advtrains_dtrack_swrcr_60.b3d
+++ b/advtrains/advtrains/models/advtrains_dtrack_swrcr_60.b3d
diff --git a/models/advtrains_dtrack_swrst.b3d b/advtrains/advtrains/models/advtrains_dtrack_swrst.b3d
index 0b3e7ad..0b3e7ad 100644
--- a/models/advtrains_dtrack_swrst.b3d
+++ b/advtrains/advtrains/models/advtrains_dtrack_swrst.b3d
diff --git a/models/advtrains_dtrack_swrst_30.b3d b/advtrains/advtrains/models/advtrains_dtrack_swrst_30.b3d
index 4aea19b..4aea19b 100644
--- a/models/advtrains_dtrack_swrst_30.b3d
+++ b/advtrains/advtrains/models/advtrains_dtrack_swrst_30.b3d
diff --git a/models/advtrains_dtrack_swrst_45.b3d b/advtrains/advtrains/models/advtrains_dtrack_swrst_45.b3d
index 4182fe5..4182fe5 100644
--- a/models/advtrains_dtrack_swrst_45.b3d
+++ b/advtrains/advtrains/models/advtrains_dtrack_swrst_45.b3d
diff --git a/models/advtrains_dtrack_swrst_60.b3d b/advtrains/advtrains/models/advtrains_dtrack_swrst_60.b3d
index 6d2c891..6d2c891 100644
--- a/models/advtrains_dtrack_swrst_60.b3d
+++ b/advtrains/advtrains/models/advtrains_dtrack_swrst_60.b3d
diff --git a/models/advtrains_dtrack_vst1.b3d b/advtrains/advtrains/models/advtrains_dtrack_vst1.b3d
index c9d7427..c9d7427 100644
--- a/models/advtrains_dtrack_vst1.b3d
+++ b/advtrains/advtrains/models/advtrains_dtrack_vst1.b3d
diff --git a/models/advtrains_dtrack_vst1_45.b3d b/advtrains/advtrains/models/advtrains_dtrack_vst1_45.b3d
index 14d438c..14d438c 100644
--- a/models/advtrains_dtrack_vst1_45.b3d
+++ b/advtrains/advtrains/models/advtrains_dtrack_vst1_45.b3d
diff --git a/models/advtrains_dtrack_vst2.b3d b/advtrains/advtrains/models/advtrains_dtrack_vst2.b3d
index c128650..c128650 100644
--- a/models/advtrains_dtrack_vst2.b3d
+++ b/advtrains/advtrains/models/advtrains_dtrack_vst2.b3d
diff --git a/models/advtrains_dtrack_vst2_45.b3d b/advtrains/advtrains/models/advtrains_dtrack_vst2_45.b3d
index 263276d..263276d 100644
--- a/models/advtrains_dtrack_vst2_45.b3d
+++ b/advtrains/advtrains/models/advtrains_dtrack_vst2_45.b3d
diff --git a/models/advtrains_dtrack_vst31.b3d b/advtrains/advtrains/models/advtrains_dtrack_vst31.b3d
index df0f383..df0f383 100644
--- a/models/advtrains_dtrack_vst31.b3d
+++ b/advtrains/advtrains/models/advtrains_dtrack_vst31.b3d
diff --git a/models/advtrains_dtrack_vst32.b3d b/advtrains/advtrains/models/advtrains_dtrack_vst32.b3d
index 01d2978..01d2978 100644
--- a/models/advtrains_dtrack_vst32.b3d
+++ b/advtrains/advtrains/models/advtrains_dtrack_vst32.b3d
diff --git a/models/advtrains_dtrack_vst33.b3d b/advtrains/advtrains/models/advtrains_dtrack_vst33.b3d
index 7fe418d..7fe418d 100644
--- a/models/advtrains_dtrack_vst33.b3d
+++ b/advtrains/advtrains/models/advtrains_dtrack_vst33.b3d
diff --git a/models/advtrains_modernwagon.b3d b/advtrains/advtrains/models/advtrains_modernwagon.b3d
index aacddca..aacddca 100644
--- a/models/advtrains_modernwagon.b3d
+++ b/advtrains/advtrains/models/advtrains_modernwagon.b3d
diff --git a/models/advtrains_retrosignal_off.b3d b/advtrains/advtrains/models/advtrains_retrosignal_off.b3d
index 3d231dd..3d231dd 100644
--- a/models/advtrains_retrosignal_off.b3d
+++ b/advtrains/advtrains/models/advtrains_retrosignal_off.b3d
diff --git a/models/advtrains_retrosignal_off_30.b3d b/advtrains/advtrains/models/advtrains_retrosignal_off_30.b3d
index da258e1..da258e1 100644
--- a/models/advtrains_retrosignal_off_30.b3d
+++ b/advtrains/advtrains/models/advtrains_retrosignal_off_30.b3d
diff --git a/models/advtrains_retrosignal_off_45.b3d b/advtrains/advtrains/models/advtrains_retrosignal_off_45.b3d
index 338224a..338224a 100644
--- a/models/advtrains_retrosignal_off_45.b3d
+++ b/advtrains/advtrains/models/advtrains_retrosignal_off_45.b3d
diff --git a/models/advtrains_retrosignal_off_60.b3d b/advtrains/advtrains/models/advtrains_retrosignal_off_60.b3d
index c560ca1..c560ca1 100644
--- a/models/advtrains_retrosignal_off_60.b3d
+++ b/advtrains/advtrains/models/advtrains_retrosignal_off_60.b3d
diff --git a/models/advtrains_retrosignal_on.b3d b/advtrains/advtrains/models/advtrains_retrosignal_on.b3d
index 3d19439..3d19439 100644
--- a/models/advtrains_retrosignal_on.b3d
+++ b/advtrains/advtrains/models/advtrains_retrosignal_on.b3d
diff --git a/models/advtrains_retrosignal_on_30.b3d b/advtrains/advtrains/models/advtrains_retrosignal_on_30.b3d
index 98f8a92..98f8a92 100644
--- a/models/advtrains_retrosignal_on_30.b3d
+++ b/advtrains/advtrains/models/advtrains_retrosignal_on_30.b3d
diff --git a/models/advtrains_retrosignal_on_45.b3d b/advtrains/advtrains/models/advtrains_retrosignal_on_45.b3d
index 414e121..414e121 100644
--- a/models/advtrains_retrosignal_on_45.b3d
+++ b/advtrains/advtrains/models/advtrains_retrosignal_on_45.b3d
diff --git a/models/advtrains_retrosignal_on_60.b3d b/advtrains/advtrains/models/advtrains_retrosignal_on_60.b3d
index a51529a..a51529a 100644
--- a/models/advtrains_retrosignal_on_60.b3d
+++ b/advtrains/advtrains/models/advtrains_retrosignal_on_60.b3d
diff --git a/models/advtrains_signal.b3d b/advtrains/advtrains/models/advtrains_signal.b3d
index 7f69560..7f69560 100644
--- a/models/advtrains_signal.b3d
+++ b/advtrains/advtrains/models/advtrains_signal.b3d
diff --git a/models/advtrains_signal_30.b3d b/advtrains/advtrains/models/advtrains_signal_30.b3d
index 0b949a7..0b949a7 100644
--- a/models/advtrains_signal_30.b3d
+++ b/advtrains/advtrains/models/advtrains_signal_30.b3d
diff --git a/models/advtrains_signal_45.b3d b/advtrains/advtrains/models/advtrains_signal_45.b3d
index ccaebf4..ccaebf4 100644
--- a/models/advtrains_signal_45.b3d
+++ b/advtrains/advtrains/models/advtrains_signal_45.b3d
diff --git a/models/advtrains_signal_60.b3d b/advtrains/advtrains/models/advtrains_signal_60.b3d
index cf41e6d..cf41e6d 100644
--- a/models/advtrains_signal_60.b3d
+++ b/advtrains/advtrains/models/advtrains_signal_60.b3d
diff --git a/models/advtrains_track_cr.b3d b/advtrains/advtrains/models/advtrains_track_cr.b3d
index b0f5e4b..b0f5e4b 100644
--- a/models/advtrains_track_cr.b3d
+++ b/advtrains/advtrains/models/advtrains_track_cr.b3d
diff --git a/models/advtrains_track_st.b3d b/advtrains/advtrains/models/advtrains_track_st.b3d
index 10b5d90..10b5d90 100644
--- a/models/advtrains_track_st.b3d
+++ b/advtrains/advtrains/models/advtrains_track_st.b3d
diff --git a/models/advtrains_track_st_45.b3d b/advtrains/advtrains/models/advtrains_track_st_45.b3d
index 32505a1..32505a1 100644
--- a/models/advtrains_track_st_45.b3d
+++ b/advtrains/advtrains/models/advtrains_track_st_45.b3d
diff --git a/models/trackplane.b3d b/advtrains/advtrains/models/trackplane.b3d
index b4728c3..b4728c3 100644
--- a/models/trackplane.b3d
+++ b/advtrains/advtrains/models/trackplane.b3d
diff --git a/advtrains/advtrains/nodedb.lua b/advtrains/advtrains/nodedb.lua
new file mode 100644
index 0000000..0e1d836
--- /dev/null
+++ b/advtrains/advtrains/nodedb.lua
@@ -0,0 +1,232 @@
+--nodedb.lua
+--database of all nodes that have 'save_in_nodedb' field set to true in node definition
+
+
+
+--serialization format:
+--(6byte poshash) (2byte contentid)
+--contentid := (14bit nodeid, 2bit param2)
+
+local function hash_to_bytes(x)
+	local aH = math.floor(x / 1099511627776) % 256;
+	local aL = math.floor(x /    4294967296) % 256;
+	local bH = math.floor(x /      16777216) % 256;
+	local bL = math.floor(x /         65536) % 256;
+	local cH = math.floor(x /           256) % 256;
+	local cL = math.floor(x                ) % 256;
+	return(string.char(aH, aL, bH, bL, cH, cL));
+end
+local function cid_to_bytes(x)
+	local cH = math.floor(x /           256) % 256;
+	local cL = math.floor(x                ) % 256;
+	return(string.char(cH, cL));
+end
+local function bytes_to_hash(bytes)
+	local t={string.byte(bytes,1,-1)}
+	local n = 
+		t[1] * 1099511627776 +
+		t[2] *    4294967296 +
+		t[3] *      16777216 +
+		t[4] *         65536 +
+		t[5] *           256 +
+		t[6]
+    return n
+end
+local function bytes_to_cid(bytes)
+	local t={string.byte(bytes,1,-1)}
+	local n = 
+		t[1] *           256 +
+		t[2]
+    return n
+end
+local function l2b(x)
+	return x%4
+end
+local function u14b(x)
+	return math.floor(x/4)
+end
+local ndb={}
+
+--local variables for performance
+local ndb_nodeids={}
+local ndb_nodes={}
+
+--load
+--nodeids get loaded by advtrains init.lua and passed here
+function ndb.load_data(data)
+	ndb_nodeids = data and data.nodeids or {}
+end
+
+local path=minetest.get_worldpath().."/advtrains_ndb"
+
+local file, err = io.open(path, "r")
+if not file then
+	atprint("load ndb failed: ", err or "Unknown Error")
+else
+	local cnt=0
+	local hst=file:read(6)
+	local cid=file:read(2)
+	while hst and #hst==6 and cid and #cid==2 do
+		ndb_nodes[bytes_to_hash(hst)]=bytes_to_cid(cid)
+		cnt=cnt+1
+		hst=file:read(6)
+		cid=file:read(2)
+	end
+	atprint("nodedb: read", cnt, "nodes.")
+	file:close()
+end
+
+--save
+function ndb.save_data()
+	local file, err = io.open(path, "w")
+	if not file then
+		atprint("load ndb failed: ", err or "Unknown Error")
+	else
+		for hash, cid in pairs(ndb_nodes) do
+			file:write(hash_to_bytes(hash))
+			file:write(cid_to_bytes(cid))
+		end
+		file:close()
+	end
+	return {nodeids = ndb_nodeids}
+end
+
+--function to get node. track database is not helpful here.
+function ndb.get_node_or_nil(pos)
+	local node=minetest.get_node_or_nil(pos)
+	if node then
+		return node
+	else
+		--maybe we have the node in the database...
+		local cid=ndb_nodes[minetest.hash_node_position(pos)]
+		if cid then
+			local nodeid = ndb_nodeids[u14b(cid)]
+			if nodeid then
+				--atprint("ndb.get_node_or_nil",pos,"found node",nodeid,"cid",cid,"par2",l2b(cid))
+				return {name=nodeid, param2 = l2b(cid)}
+			end
+		end
+	end
+	atprint("ndb.get_node_or_nil",pos,"not found")
+end
+function ndb.get_node(pos)
+	local n=ndb.get_node_or_nil(pos)
+	if not n then
+		return {name="ignore", param2=0}
+	end
+	return n
+end
+
+function ndb.swap_node(pos, node)
+	minetest.swap_node(pos, node)
+	ndb.update(pos, node)
+end
+
+function ndb.update(pos, pnode)
+	local node = pnode or minetest.get_node_or_nil(pos)
+	if not node or node.name=="ignore" then return end
+	if minetest.registered_nodes[node.name] and minetest.registered_nodes[node.name].groups.save_in_nodedb then
+		local nid
+		for tnid, nname in pairs(ndb_nodeids) do
+			if nname==node.name then
+				nid=tnid
+			end
+		end
+		if not nid then
+			nid=#ndb_nodeids+1
+			ndb_nodeids[nid]=node.name
+		end
+		local hash = minetest.hash_node_position(pos)
+		ndb_nodes[hash] = (nid * 4) + (l2b(node.param2 or 0))
+		--atprint("nodedb: updating node", pos, "stored nid",nid,"assigned",ndb_nodeids[nid],"resulting cid",ndb_nodes[hash])
+	else
+		--at this position there is no longer a node that needs to be tracked.
+		local hash = minetest.hash_node_position(pos)
+		ndb_nodes[hash] = nil
+	end
+end
+
+function ndb.clear(pos)
+	local hash = minetest.hash_node_position(pos)
+	ndb_nodes[hash] = nil
+end
+
+
+--get_node with pseudoload. now we only need track data, so we can use the trackdb as second fallback
+--nothing new will be saved inside the trackdb.
+--returns:
+--true, conn1, conn2, rely1, rely2, railheight   in case everything's right.
+--false  if it's not a rail or the train does not drive on this rail, but it is loaded or
+--nil    if the node is neither loaded nor in trackdb
+--the distraction between false and nil will be needed only in special cases.(train initpos)
+function advtrains.get_rail_info_at(pos, drives_on)
+	local rdp=advtrains.round_vector_floor_y(pos)
+	
+	local node=ndb.get_node_or_nil(rdp)
+	
+	--still no node?
+	--advtrains.trackdb is nil when there's no data available.
+	if not node then
+		if advtrains.trackdb then
+			--try raildb (see trackdb_legacy.lua)
+			local dbe=(advtrains.trackdb[rdp.y] and advtrains.trackdb[rdp.y][rdp.x] and advtrains.trackdb[rdp.y][rdp.x][rdp.z])
+			if dbe then
+				for tt,_ in pairs(drives_on) do
+					if not dbe.tracktype or tt==dbe.tracktype then
+						return true, dbe.conn1, dbe.conn2, dbe.rely1 or 0, dbe.rely2 or 0, dbe.railheight or 0
+					end
+				end
+			end
+		end
+		return nil
+	end
+	local nodename=node.name
+	if(not advtrains.is_track_and_drives_on(nodename, drives_on)) then
+		return false
+	end
+	local conn1, conn2, rely1, rely2, railheight, tracktype=advtrains.get_track_connections(node.name, node.param2)
+	
+	return true, conn1, conn2, rely1, rely2, railheight
+end
+
+
+minetest.register_abm({
+        name = "advtrains:nodedb_on_load_update",
+        nodenames = {"group:save_in_nodedb"},
+        run_at_every_load = true,
+        action = function(pos, node)
+			local cid=ndb_nodes[minetest.hash_node_position(pos)]
+			if cid then
+				--if in database, detect changes and apply.
+				local nodeid = ndb_nodeids[u14b(cid)]
+				local param2 = l2b(cid)
+				if not nodeid then
+					--something went wrong
+					atprint("nodedb: lbm nid not found", pos, "with nid", u14b(cid), "param2", param2, "cid is", cid)
+					ndb.update(pos, node)
+				else
+					if (nodeid~=node.name or param2~=node.param2) then
+						atprint("nodedb: lbm replaced", pos, "with nodeid", nodeid, "param2", param2, "cid is", cid)
+						minetest.swap_node(pos, {name=nodeid, param2 = param2})
+					end
+				end
+			else
+				--if not in database, take it.
+				atprint("nodedb: ", pos, "not in database")
+				ndb.update(pos, node)
+			end
+        end,
+        interval=10,
+        chance=1,
+    })
+    
+minetest.register_on_dignode(function(pos, oldnode, digger)
+	ndb.clear(pos)
+end)
+
+function ndb.t()
+	return ndb_nodes[141061759008906]
+end
+
+advtrains.ndb=ndb
+
diff --git a/signals.lua b/advtrains/advtrains/signals.lua
index 8be65e0..59c5af1 100644
--- a/signals.lua
+++ b/advtrains/advtrains/signals.lua
@@ -29,14 +29,15 @@ for r,f in pairs({on="off", off="on"}) do
 				choppy=3,
 				not_blocking_trains=1,
 				not_in_creative_inventory=crea,
+				save_in_nodedb=1,
 			},
 			mesecons = {effector = {
 				["action_"..f] = function (pos, node)
-					minetest.swap_node(pos, {name = "advtrains:retrosignal_"..f..rotation, param2 = node.param2})
+					advtrains.np.swap_node(pos, {name = "advtrains:retrosignal_"..f..rotation, param2 = node.param2})
 				end
 			}},
 			on_rightclick=function(pos, node, clicker)
-				minetest.swap_node(pos, {name = "advtrains:retrosignal_"..f..rotation, param2 = node.param2})
+				advtrains.np.swap_node(pos, {name = "advtrains:retrosignal_"..f..rotation, param2 = node.param2})
 			end,
 		})
 		advtrains.trackplacer.add_worked("advtrains:retrosignal", r, rotation, nil)
@@ -59,6 +60,7 @@ for r,f in pairs({on="off", off="on"}) do
 				choppy=3,
 				not_blocking_trains=1,
 				not_in_creative_inventory=crea,
+				save_in_nodedb=1,
 			},
 			light_source = 1,
 			sunlight_propagates=true,
diff --git a/textures/advtrains_couple.png b/advtrains/advtrains/textures/advtrains_couple.png
index 9e997e4..9e997e4 100644
--- a/textures/advtrains_couple.png
+++ b/advtrains/advtrains/textures/advtrains_couple.png
diff --git a/textures/advtrains_discouple.png b/advtrains/advtrains/textures/advtrains_discouple.png
index b27c4fb..b27c4fb 100644
--- a/textures/advtrains_discouple.png
+++ b/advtrains/advtrains/textures/advtrains_discouple.png
diff --git a/advtrains/advtrains/textures/advtrains_dtrack_atc_placer.png b/advtrains/advtrains/textures/advtrains_dtrack_atc_placer.png
new file mode 100644
index 0000000..31c2b30
--- /dev/null
+++ b/advtrains/advtrains/textures/advtrains_dtrack_atc_placer.png
diff --git a/textures/advtrains_dtrack_bumper_placer.png b/advtrains/advtrains/textures/advtrains_dtrack_bumper_placer.png
index 27191fe..27191fe 100644
--- a/textures/advtrains_dtrack_bumper_placer.png
+++ b/advtrains/advtrains/textures/advtrains_dtrack_bumper_placer.png
diff --git a/textures/advtrains_dtrack_detector_placer.png b/advtrains/advtrains/textures/advtrains_dtrack_detector_placer.png
index e6c6ad6..e6c6ad6 100644
--- a/textures/advtrains_dtrack_detector_placer.png
+++ b/advtrains/advtrains/textures/advtrains_dtrack_detector_placer.png
diff --git a/advtrains/advtrains/textures/advtrains_dtrack_placer.png b/advtrains/advtrains/textures/advtrains_dtrack_placer.png
new file mode 100644
index 0000000..7bef8a9
--- /dev/null
+++ b/advtrains/advtrains/textures/advtrains_dtrack_placer.png
diff --git a/advtrains/advtrains/textures/advtrains_dtrack_rail.png b/advtrains/advtrains/textures/advtrains_dtrack_rail.png
new file mode 100644
index 0000000..1cf7f83
--- /dev/null
+++ b/advtrains/advtrains/textures/advtrains_dtrack_rail.png
diff --git a/advtrains/advtrains/textures/advtrains_dtrack_rail_atc.png b/advtrains/advtrains/textures/advtrains_dtrack_rail_atc.png
new file mode 100644
index 0000000..d171985
--- /dev/null
+++ b/advtrains/advtrains/textures/advtrains_dtrack_rail_atc.png
diff --git a/advtrains/advtrains/textures/advtrains_dtrack_rail_detector_on.png b/advtrains/advtrains/textures/advtrains_dtrack_rail_detector_on.png
new file mode 100644
index 0000000..4f09b35
--- /dev/null
+++ b/advtrains/advtrains/textures/advtrains_dtrack_rail_detector_on.png
diff --git a/textures/advtrains_dtrack_slopeplacer.png b/advtrains/advtrains/textures/advtrains_dtrack_slopeplacer.png
index 1d456b0..1d456b0 100644
--- a/textures/advtrains_dtrack_slopeplacer.png
+++ b/advtrains/advtrains/textures/advtrains_dtrack_slopeplacer.png
diff --git a/textures/advtrains_platform.png b/advtrains/advtrains/textures/advtrains_platform.png
index 5ba9663..5ba9663 100644
--- a/textures/advtrains_platform.png
+++ b/advtrains/advtrains/textures/advtrains_platform.png
diff --git a/textures/advtrains_retrosignal.png b/advtrains/advtrains/textures/advtrains_retrosignal.png
index 141198d..141198d 100644
--- a/textures/advtrains_retrosignal.png
+++ b/advtrains/advtrains/textures/advtrains_retrosignal.png
diff --git a/textures/advtrains_retrosignal_inv.png b/advtrains/advtrains/textures/advtrains_retrosignal_inv.png
index 1036594..1036594 100644
--- a/textures/advtrains_retrosignal_inv.png
+++ b/advtrains/advtrains/textures/advtrains_retrosignal_inv.png
diff --git a/textures/advtrains_signal_inv.png b/advtrains/advtrains/textures/advtrains_signal_inv.png
index ed64ed9..ed64ed9 100644
--- a/textures/advtrains_signal_inv.png
+++ b/advtrains/advtrains/textures/advtrains_signal_inv.png
diff --git a/textures/advtrains_signal_off.png b/advtrains/advtrains/textures/advtrains_signal_off.png
index 8046e52..8046e52 100644
--- a/textures/advtrains_signal_off.png
+++ b/advtrains/advtrains/textures/advtrains_signal_off.png
diff --git a/textures/advtrains_signal_on.png b/advtrains/advtrains/textures/advtrains_signal_on.png
index 5228bb3..5228bb3 100644
--- a/textures/advtrains_signal_on.png
+++ b/advtrains/advtrains/textures/advtrains_signal_on.png
diff --git a/textures/advtrains_track_cr.png b/advtrains/advtrains/textures/advtrains_track_cr.png
index 40f0cc5..40f0cc5 100644
--- a/textures/advtrains_track_cr.png
+++ b/advtrains/advtrains/textures/advtrains_track_cr.png
diff --git a/textures/advtrains_track_cr_45.png b/advtrains/advtrains/textures/advtrains_track_cr_45.png
index 54966b3..54966b3 100644
--- a/textures/advtrains_track_cr_45.png
+++ b/advtrains/advtrains/textures/advtrains_track_cr_45.png
diff --git a/textures/advtrains_track_placer.png b/advtrains/advtrains/textures/advtrains_track_placer.png
index 03e17ed..03e17ed 100644
--- a/textures/advtrains_track_placer.png
+++ b/advtrains/advtrains/textures/advtrains_track_placer.png
diff --git a/textures/advtrains_track_st.png b/advtrains/advtrains/textures/advtrains_track_st.png
index 5ad7e4f..5ad7e4f 100644
--- a/textures/advtrains_track_st.png
+++ b/advtrains/advtrains/textures/advtrains_track_st.png
diff --git a/textures/advtrains_track_st_45.png b/advtrains/advtrains/textures/advtrains_track_st_45.png
index 63b4c96..63b4c96 100644
--- a/textures/advtrains_track_st_45.png
+++ b/advtrains/advtrains/textures/advtrains_track_st_45.png
diff --git a/textures/advtrains_track_swlcr.png b/advtrains/advtrains/textures/advtrains_track_swlcr.png
index d9b5c0b..d9b5c0b 100644
--- a/textures/advtrains_track_swlcr.png
+++ b/advtrains/advtrains/textures/advtrains_track_swlcr.png
diff --git a/textures/advtrains_track_swlcr_45.png b/advtrains/advtrains/textures/advtrains_track_swlcr_45.png
index f098fc9..f098fc9 100644
--- a/textures/advtrains_track_swlcr_45.png
+++ b/advtrains/advtrains/textures/advtrains_track_swlcr_45.png
diff --git a/textures/advtrains_track_swlst.png b/advtrains/advtrains/textures/advtrains_track_swlst.png
index 314bd2d..314bd2d 100644
--- a/textures/advtrains_track_swlst.png
+++ b/advtrains/advtrains/textures/advtrains_track_swlst.png
diff --git a/textures/advtrains_track_swlst_45.png b/advtrains/advtrains/textures/advtrains_track_swlst_45.png
index 765d0ec..765d0ec 100644
--- a/textures/advtrains_track_swlst_45.png
+++ b/advtrains/advtrains/textures/advtrains_track_swlst_45.png
diff --git a/textures/advtrains_track_swrcr.png b/advtrains/advtrains/textures/advtrains_track_swrcr.png
index f74e1bc..f74e1bc 100644
--- a/textures/advtrains_track_swrcr.png
+++ b/advtrains/advtrains/textures/advtrains_track_swrcr.png
diff --git a/textures/advtrains_track_swrcr_45.png b/advtrains/advtrains/textures/advtrains_track_swrcr_45.png
index fa432aa..fa432aa 100644
--- a/textures/advtrains_track_swrcr_45.png
+++ b/advtrains/advtrains/textures/advtrains_track_swrcr_45.png
diff --git a/textures/advtrains_track_swrst.png b/advtrains/advtrains/textures/advtrains_track_swrst.png
index 06ea29e..06ea29e 100644
--- a/textures/advtrains_track_swrst.png
+++ b/advtrains/advtrains/textures/advtrains_track_swrst.png
diff --git a/textures/advtrains_track_swrst_45.png b/advtrains/advtrains/textures/advtrains_track_swrst_45.png
index be477b7..be477b7 100644
--- a/textures/advtrains_track_swrst_45.png
+++ b/advtrains/advtrains/textures/advtrains_track_swrst_45.png
diff --git a/textures/advtrains_trackworker.png b/advtrains/advtrains/textures/advtrains_trackworker.png
index b50bcae..b50bcae 100644
--- a/textures/advtrains_trackworker.png
+++ b/advtrains/advtrains/textures/advtrains_trackworker.png
diff --git a/textures/drwho_screwdriver.png b/advtrains/advtrains/textures/drwho_screwdriver.png
index b50bcae..b50bcae 100644
--- a/textures/drwho_screwdriver.png
+++ b/advtrains/advtrains/textures/drwho_screwdriver.png
diff --git a/advtrains/advtrains/trackdb_legacy.lua b/advtrains/advtrains/trackdb_legacy.lua
new file mode 100644
index 0000000..99349e8
--- /dev/null
+++ b/advtrains/advtrains/trackdb_legacy.lua
@@ -0,0 +1,27 @@
+--trackdb_legacy.lua
+--loads the (old) track database. the only use for this is to provide data for rails that haven't been written into the ndb database.
+--nothing will be saved.
+--if the user thinks that he has loaded every track in his world at least once, he can delete the track database.
+
+--trackdb[[y][x][z]={conn1, conn2, rely1, rely2, railheight}
+
+
+--trackdb keeps its own save file.
+advtrains.fpath_tdb=minetest.get_worldpath().."/advtrains_trackdb2"
+local file, err = io.open(advtrains.fpath_tdb, "r")
+if not file then
+	atprint("Not loading a trackdb file.")
+else
+	local tbl = minetest.deserialize(file:read("*a"))
+	if type(tbl) == "table" then
+		advtrains.trackdb=tbl
+		atprint("Loaded trackdb file.")
+	end
+	file:close()
+end
+	
+
+
+
+
+
diff --git a/trackplacer.lua b/advtrains/advtrains/trackplacer.lua
index eebf2ae..1cb7680 100644
--- a/trackplacer.lua
+++ b/advtrains/advtrains/trackplacer.lua
@@ -117,19 +117,19 @@ function tp.bend_rail(originpos, conn, nnpref)
 		return false--dont destroy existing track
 	elseif adj1 and not adj2 then
 		if tr.double_conn[adj1.."_"..newdir] then
-			minetest.set_node(pos, tr.double_conn[adj1.."_"..newdir])
+			advtrains.ndb.swap_node(pos, tr.double_conn[adj1.."_"..newdir])
 			return true--if exists, connect new rail and old end
 		end
 		return false
 	else
 		if tr.single_conn[newdir] then--just rotate old rail to right orientation
-			minetest.set_node(pos, tr.single_conn[newdir])
+			advtrains.ndb.swap_node(pos, tr.single_conn[newdir])
 			return true
 		end
 		return false
 	end
 end
-function tp.placetrack(pos, nnpref)
+function tp.placetrack(pos, nnpref, placer, itemstack, pointed_thing)
 	--1. find all rails that are likely to be connected
 	local tr=tp.tracks[nnpref]
 	local p_rails={}
@@ -140,9 +140,16 @@ function tp.placetrack(pos, nnpref)
 	end
 	if #p_rails==0 then
 		minetest.set_node(pos, {name=nnpref.."_"..tr.default})
+		if minetest.registered_nodes[nnpref.."_"..tr.default] and minetest.registered_nodes[nnpref.."_"..tr.default].after_place_node then
+			minetest.registered_nodes[nnpref.."_"..tr.default].after_place_node(pos, placer, itemstack, pointed_thing)
+		end
 	elseif #p_rails==1 then
 		tp.bend_rail(pos, p_rails[1], nnpref)
-		minetest.set_node(pos, tr.single_conn[p_rails[1]])
+		advtrains.ndb.swap_node(pos, tr.single_conn[p_rails[1]])
+		local nname=tr.single_conn[p_rails[1]].name
+		if minetest.registered_nodes[nname] and minetest.registered_nodes[nname].after_place_node then
+			minetest.registered_nodes[nname].after_place_node(pos, placer, itemstack, pointed_thing)
+		end
 	else
 		--iterate subsets
 		for k1, conn1 in ipairs(p_rails) do
@@ -151,7 +158,11 @@ function tp.placetrack(pos, nnpref)
 					if (tr.double_conn[conn1.."_"..conn2]) then
 						tp.bend_rail(pos, conn1, nnpref)
 						tp.bend_rail(pos, conn2, nnpref)
-						minetest.set_node(pos, tr.double_conn[conn1.."_"..conn2])
+						advtrains.ndb.swap_node(pos, tr.double_conn[conn1.."_"..conn2])
+						local nname=tr.double_conn[conn1.."_"..conn2].name
+						if minetest.registered_nodes[nname] and minetest.registered_nodes[nname].after_place_node then
+							minetest.registered_nodes[nname].after_place_node(pos, placer, itemstack, pointed_thing)
+						end
 						return
 					end
 				end
@@ -159,7 +170,11 @@ function tp.placetrack(pos, nnpref)
 		end
 		--not found
 		tp.bend_rail(pos, p_rails[1], nnpref)
-		minetest.set_node(pos, tr.single_conn[p_rails[1]])
+		advtrains.ndb.swap_node(pos, tr.single_conn[p_rails[1]])
+		local nname=tr.single_conn[p_rails[1]].name
+		if minetest.registered_nodes[nname] and minetest.registered_nodes[nname].after_place_node then
+			minetest.registered_nodes[nname].after_place_node(pos, placer, itemstack, pointed_thing)
+		end
 	end
 end
 
@@ -183,7 +198,7 @@ function tp.register_track_placer(nnprefix, imgprefix, dispname)
 				end
 				if minetest.registered_nodes[minetest.get_node(pos).name] and minetest.registered_nodes[minetest.get_node(pos).name].buildable_to
 					and minetest.registered_nodes[minetest.get_node(upos).name] and minetest.registered_nodes[minetest.get_node(upos).name].walkable then
-					tp.placetrack(pos, nnprefix)
+					tp.placetrack(pos, nnprefix, placer, itemstack, pointed_thing)
 					if not minetest.setting_getbool("creative_mode") then
 						itemstack:take_item()
 					end
@@ -218,7 +233,7 @@ minetest.register_craftitem("advtrains:trackworker",{
 			if advtrains.is_train_at_pos(pos) then return end
 
 			local nnprefix, suffix, rotation=string.match(node.name, "^(.+)_([^_]+)(_[^_]+)$")
-			--print(node.name.."\npattern recognizes:"..nodeprefix.." / "..railtype.." / "..rotation)
+			--atprint(node.name.."\npattern recognizes:"..nodeprefix.." / "..railtype.." / "..rotation)
 			if not tp.tracks[nnprefix] or not tp.tracks[nnprefix].twrotate[suffix] then
 				nnprefix, suffix=string.match(node.name, "^(.+)_([^_]+)$")
 				rotation = ""
@@ -230,7 +245,7 @@ minetest.register_craftitem("advtrains:trackworker",{
 			local modext=tp.tracks[nnprefix].twrotate[suffix]
 
 			if rotation==modext[#modext] then --increase param2
-				minetest.set_node(pos, {name=nnprefix.."_"..suffix..modext[1], param2=(node.param2+1)%4})
+				advtrains.ndb.swap_node(pos, {name=nnprefix.."_"..suffix..modext[1], param2=(node.param2+1)%4})
 				return
 			else
 				local modpos
@@ -239,7 +254,7 @@ minetest.register_craftitem("advtrains:trackworker",{
 						minetest.chat_send_player(placer:get_player_name(), "This node can't be rotated using the trackworker!")
 					return
 				end
-				minetest.set_node(pos, {name=nnprefix.."_"..suffix..modext[modpos+1], param2=node.param2})
+				advtrains.ndb.swap_node(pos, {name=nnprefix.."_"..suffix..modext[modpos+1], param2=node.param2})
 			end
 			advtrains.invalidate_all_paths()
 		end
@@ -259,7 +274,7 @@ minetest.register_craftitem("advtrains:trackworker",{
 			--if not advtrains.is_track_and_drives_on(minetest.get_node(pos).name, advtrains.all_tracktypes) then return end
 			if advtrains.is_train_at_pos(pos) then return end
 			local nnprefix, suffix, rotation=string.match(node.name, "^(.+)_([^_]+)(_[^_]+)$")
-	        --print(node.name.."\npattern recognizes:"..nodeprefix.." / "..railtype.." / "..rotation)
+	        --atprint(node.name.."\npattern recognizes:"..nodeprefix.." / "..railtype.." / "..rotation)
 		    if not tp.tracks[nnprefix] or not tp.tracks[nnprefix].twcycle[suffix] then
 			  nnprefix, suffix=string.match(node.name, "^(.+)_([^_]+)$")
 			  rotation = ""
@@ -269,11 +284,11 @@ minetest.register_craftitem("advtrains:trackworker",{
 			  end
 		    end
 			local nextsuffix=tp.tracks[nnprefix].twcycle[suffix]
-			minetest.set_node(pos, {name=nnprefix.."_"..nextsuffix..rotation, param2=node.param2})
+			advtrains.ndb.swap_node(pos, {name=nnprefix.."_"..nextsuffix..rotation, param2=node.param2})
 			--invalidate trains
 			advtrains.invalidate_all_paths()
 		else
-			print(name, dump(tp.tracks))
+			atprint(name, dump(tp.tracks))
 		end
 	end,
 })
diff --git a/tracks.lua b/advtrains/advtrains/tracks.lua
index 99dbb27..1108a06 100644
--- a/tracks.lua
+++ b/advtrains/advtrains/tracks.lua
@@ -36,7 +36,8 @@ advtrains.all_tracktypes={}
 --definition preparation
 local function conns(c1, c2, r1, r2, rh, rots) return {conn1=c1, conn2=c2, rely1=r1, rely2=r2, railheight=rh} end
 
-local t_30deg={
+local ap={}
+ap.t_30deg={
 	regstep=1,
 	variant={
 		st=conns(0,8),
@@ -110,7 +111,7 @@ local t_30deg={
 	rotation={"", "_30", "_45", "_60"},
 	increativeinv={},
 }
-local t_30deg_straightonly={
+ap.t_30deg_straightonly={
 	regstep=1,
 	variant={
 		st=conns(0,8),
@@ -135,7 +136,7 @@ local t_30deg_straightonly={
 	rotation={"", "_30", "_45", "_60"},
 	increativeinv={st},
 }
-local t_30deg_straightonly_noplacer={
+ap.t_30deg_straightonly_noplacer={
 	regstep=1,
 	variant={
 		st=conns(0,8),
@@ -160,7 +161,7 @@ local t_30deg_straightonly_noplacer={
 	rotation={"", "_30", "_45", "_60"},
 	increativeinv={st},
 }
-local t_45deg={
+ap.t_45deg={
 	regstep=2,
 	variant={
 		st=conns(0,8),
@@ -215,6 +216,7 @@ local t_45deg={
 	rotation={"", "_45"},
 	increativeinv={vst1=true, vst2=true}
 }
+advtrains.trackpresets = ap
 
 --definition format: ([] optional)
 --[[{
@@ -233,10 +235,7 @@ local t_45deg={
 function advtrains.register_tracks(tracktype, def, preset)
 	local function make_switchfunc(suffix_target, mesecon_state)
 		local switchfunc=function(pos, node)
-			if advtrains.is_train_at_pos(pos) then return end
-			minetest.set_node(pos, {name=def.nodename_prefix.."_"..suffix_target, param2=node.param2})
-			advtrains.invalidate_all_paths()
-			advtrains.reset_trackdb_position(pos)
+			advtrains.ndb.swap_node(pos, {name=def.nodename_prefix.."_"..suffix_target, param2=node.param2})
 		end
 		return switchfunc, {effector = {
 			["action_"..mesecon_state] = switchfunc,
@@ -256,10 +255,12 @@ function advtrains.register_tracks(tracktype, def, preset)
 			rely1=conns.rely1 or 0,
 			rely2=conns.rely2 or 0,
 			railheight=conns.railheight or 0,
+			
 			on_rightclick=switchfunc,
 			groups = {
 				attached_node=1,
 				["advtrains_track_"..tracktype]=1,
+				save_in_nodedb=1,
 				dig_immediate=2,
 				not_in_creative_inventory=(not in_creative_inv and 1 or nil),
 				not_blocking_trains=1,
@@ -297,10 +298,10 @@ function advtrains.register_tracks(tracktype, def, preset)
 		end,
 		after_dig_node=function(pos)
 			advtrains.invalidate_all_paths()
-			advtrains.reset_trackdb_position(pos)
+			advtrains.ndb.update(pos)
 		end,
 		after_place_node=function(pos)
-			advtrains.reset_trackdb_position(pos)
+			advtrains.ndb.update(pos)
 		end,
 	}, def.common or {})
 	--make trackplacer base def
@@ -346,17 +347,17 @@ function advtrains.register_tracks(tracktype, def, preset)
 			end
 		end
 	end
-	table.insert(advtrains.all_tracktypes, tracktype)
+	advtrains.all_tracktypes[tracktype]=true
 end
 
 
-function advtrains.is_track_and_drives_on(nodename, drives_on)
+function advtrains.is_track_and_drives_on(nodename, drives_on_p)
 	if not minetest.registered_nodes[nodename] then
 		return false
 	end
 	local nodedef=minetest.registered_nodes[nodename]
-	for k,v in ipairs(drives_on) do
-		if nodedef.groups["advtrains_track_"..v] then
+	for k,v in pairs(drives_on_p) do
+		if nodedef.groups["advtrains_track_"..k] then
 			return true
 		end
 	end
@@ -365,12 +366,19 @@ end
 
 function advtrains.get_track_connections(name, param2)
 	local nodedef=minetest.registered_nodes[name]
-	if not nodedef then print("[advtrains] get_track_connections couldn't find nodedef for nodename "..(name or "nil")) return 0, 8, 0, 0, 0 end
+	if not nodedef then atprint(" get_track_connections couldn't find nodedef for nodename "..(name or "nil")) return 0, 8, 0, 0, 0 end
 	local noderot=param2
 	if not param2 then noderot=0 end
-	if noderot > 3 then print("[advtrains] get_track_connections: rail has invaild param2 of "..noderot) noderot=0 end
+	if noderot > 3 then atprint(" get_track_connections: rail has invaild param2 of "..noderot) noderot=0 end
 	
-	return (nodedef.connect1 + 4 * noderot)%16, (nodedef.connect2  + 4 * noderot)%16, nodedef.rely1 or 0, nodedef.rely2 or 0, nodedef.railheight or 0
+	local tracktype
+	for k,_ in pairs(nodedef.groups) do
+		local tt=string.match(k, "^advtrains_track_(.+)$")
+		if tt then
+			tracktype=tt
+		end
+	end
+	return (nodedef.connect1 + 4 * noderot)%16, (nodedef.connect2  + 4 * noderot)%16, nodedef.rely1 or 0, nodedef.rely2 or 0, nodedef.railheight or 0, tracktype
 end
 
 --detector code
@@ -386,50 +394,82 @@ advtrains.detector.clean_step_before = false
 --The entry already being contained in advtrains.detector.on_node_restore will not trigger an on_train_enter event on the node.  (when path is reset, this is saved).
 function advtrains.detector.enter_node(pos, train_id)
 	local pts = minetest.pos_to_string(advtrains.round_vector_floor_y(pos))
-	--print("enterNode "..pts.." "..train_id)
-	if not advtrains.detector.on_node[pts] then
-		advtrains.detector.on_node[pts]=train_id
-		if advtrains.detector.on_node_restore[pts] then
-			advtrains.detector.on_node_restore[pts]=nil
+	--atprint("enterNode "..pts.." "..sid(train_id))
+	if advtrains.detector.on_node[pts] then
+		if advtrains.trains[advtrains.detector.on_node[pts]] then
+			--atprint(""..pts.." already occupied")
+			return false
 		else
-			advtrains.detector.call_enter_callback(advtrains.round_vector_floor_y(pos), train_id)
+			advtrains.detector.leave_node(pos, advtrains.detector.on_node[pts])
 		end
 	end
+	advtrains.detector.on_node[pts]=train_id
+	if advtrains.detector.on_node_restore[pts]==train_id then
+		advtrains.detector.on_node_restore[pts]=nil
+	else
+		advtrains.detector.call_enter_callback(advtrains.round_vector_floor_y(pos), train_id)
+	end
+	return true
 end
 function advtrains.detector.leave_node(pos, train_id)
 	local pts = minetest.pos_to_string(advtrains.round_vector_floor_y(pos))
-	--print("leaveNode "..pts.." "..train_id)
-	if advtrains.detector.on_node[pts] then
+	--atprint("leaveNode "..pts.." "..sid(train_id))
+	if not advtrains.detector.on_node[pts] then
+		--atprint(""..pts.." leave: nothing here")
+		return false
+	end
+	if advtrains.detector.on_node[pts]==train_id then
 		advtrains.detector.call_leave_callback(advtrains.round_vector_floor_y(pos), train_id)
 		advtrains.detector.on_node[pts]=nil
+	else
+		if advtrains.trains[advtrains.detector.on_node[pts]] then
+			--atprint(""..pts.." occupied by another train")
+			return false
+		else
+			advtrains.detector.leave_node(pos, advtrains.detector.on_node[pts])
+			return false
+		end
 	end
+	return true
 end
 --called immediately before invalidating paths
 function advtrains.detector.setup_restore()
-	--print("setup_restore")
-	advtrains.detector.on_node_restore = advtrains.detector.on_node
+	--atprint("setup_restore")
+	-- don't execute if it already has been called. For some reason it gets called twice...
+	if advtrains.detector.clean_step_before then
+		return
+	end
+	advtrains.detector.on_node_restore={}
+	for k, v in pairs(advtrains.detector.on_node) do
+		advtrains.detector.on_node_restore[k]=v
+	end
 	advtrains.detector.on_node = {}
+	advtrains.detector.clean_step_before = true
 end
 --called one step after invalidating paths, when all trains have restored their path and called enter_node for their contents.
 function advtrains.detector.finalize_restore()
-	--print("finalize_restore")
+	--atprint("finalize_restore")
 	for pts, train_id in pairs(advtrains.detector.on_node_restore) do
-		--print("called leave callback "..pts.." "..train_id)
+		--atprint("called leave callback "..pts.." "..train_id)
 		advtrains.detector.call_leave_callback(minetest.string_to_pos(pts), train_id)
 	end
 	advtrains.detector.on_node_restore = {}
+	advtrains.detector.clean_step_before = false
 end
 function advtrains.detector.call_enter_callback(pos, train_id)
-	--print("instructed to call enter calback")
+	--atprint("instructed to call enter calback")
 
 	local node = minetest.get_node(pos) --this spares the check if node is nil, it has a name in any case
 	local mregnode=minetest.registered_nodes[node.name]
 	if mregnode and mregnode.advtrains and mregnode.advtrains.on_train_enter then
 		mregnode.advtrains.on_train_enter(pos, train_id)
-	end 
+	end
+	
+	--atc code wants to be notified too
+	advtrains.atc.trigger_controller_train_enter(pos, train_id)
 end
 function advtrains.detector.call_leave_callback(pos, train_id)
-	--print("instructed to call leave calback")
+	--atprint("instructed to call leave calback")
 
 	local node = minetest.get_node(pos) --this spares the check if node is nil, it has a name in any case
 	local mregnode=minetest.registered_nodes[node.name]
@@ -556,7 +596,7 @@ advtrains.register_tracks("regular", {
 	shared_model="trackplane.b3d",
 	description="Deprecated Track",
 	formats={vst1={}, vst2={}},
-}, t_45deg)
+}, ap.t_45deg)
 
 
 advtrains.register_tracks("default", {
@@ -567,7 +607,7 @@ advtrains.register_tracks("default", {
 	shared_texture="advtrains_dtrack_rail.png",
 	description="Track",
 	formats={vst1={true, false, true}, vst2={true, false, true}, vst31={true}, vst32={true}, vst33={true}},
-}, t_30deg)
+}, ap.t_30deg)
 
 --bumpers
 advtrains.register_tracks("default", {
@@ -578,7 +618,7 @@ advtrains.register_tracks("default", {
 	shared_texture="advtrains_dtrack_rail.png",
 	description="Bumper",
 	formats={},
-}, t_30deg_straightonly)
+}, ap.t_30deg_straightonly)
 --legacy bumpers
 for _,rot in ipairs({"", "_30", "_45", "_60"}) do
 	minetest.register_alias("advtrains:dtrack_bumper"..rot, "advtrains:dtrack_bumper_st"..rot)
@@ -609,7 +649,7 @@ if mesecon then
 				}
 			}
 		end
-	}, t_30deg_straightonly)
+	}, ap.t_30deg_straightonly)
 	advtrains.register_tracks("default", {
 		nodename_prefix="advtrains:dtrack_detector_on",
 		texture_prefix="advtrains_dtrack_detector",
@@ -634,7 +674,7 @@ if mesecon then
 				}
 			}
 		end
-	}, t_30deg_straightonly_noplacer)
+	}, ap.t_30deg_straightonly_noplacer)
 end
 --TODO legacy
 --I know lbms are better for this purpose
diff --git a/trainhud.lua b/advtrains/advtrains/trainhud.lua
index aead246..e69f04a 100644
--- a/trainhud.lua
+++ b/advtrains/advtrains/trainhud.lua
@@ -11,7 +11,7 @@ local mletter={[1]="F", [-1]="R", [0]="N"}
 function advtrains.on_control_change(pc, train, flip)
 	if pc.sneak then
 		if pc.up then
-			train.tarvelocity = advtrains.all_traintypes[train.traintype].max_speed or 10
+			train.tarvelocity = train.max_speed or 10
 		end
 		if pc.down then
 			train.tarvelocity = 0
@@ -94,14 +94,14 @@ function advtrains.set_trainhud(name, text)
 end
 function advtrains.hud_train_format(train, flip)
 	local fct=flip and -1 or 1
-	if not train or not train.traintype then return "" end
+	if not train then return "" end
 	
-	local max=advtrains.all_traintypes[train.traintype].max_speed or 10
+	local max=train.max_speed or 10
 	local vel=advtrains.abs_ceil(train.velocity)
 	local tvel=advtrains.abs_ceil(train.tarvelocity)
 	local topLine, firstLine, secondLine
 	
-	topLine=train.traintype.."  ["..mletter[fct*train.movedir].."]  "..(train.brake and "="..( train.brake_hold_state==2 and "^" or "" ).."B=" or "")
+	topLine="Train".."  ["..mletter[fct*train.movedir].."]  "..(train.brake and "="..( train.brake_hold_state==2 and "^" or "" ).."B=" or "")
 	firstLine="Speed: |"..string.rep("+", vel)..string.rep("_", max-vel)..">"
 	secondLine="Target: |"..string.rep("+", tvel)..string.rep("_", max-tvel)..">"
 	
diff --git a/trainlogic.lua b/advtrains/advtrains/trainlogic.lua
index 94dcb69..5bedfec 100644
--- a/trainlogic.lua
+++ b/advtrains/advtrains/trainlogic.lua
@@ -1,16 +1,13 @@
 --trainlogic.lua
 --controls train entities stuff about connecting/disconnecting/colliding trains and other things
 
---local print=function(t, ...) minetest.log("action", table.concat({t, ...}, " ")) minetest.chat_send_all(table.concat({t, ...}, " ")) end
-local print=function() end
 
 local benchmark=false
---printbm=function(str, t) print("[advtrains]"..str.." "..((os.clock()-t)*1000).."ms") end
 local bm={}
 local bmlt=0
 local bmsteps=0
 local bmstepint=200
-printbm=function(action, ta)
+atprintbm=function(action, ta)
 	if not benchmark then return end
 	local t=(os.clock()-ta)*1000
 	if not bm[action] then
@@ -34,123 +31,23 @@ function endstep()
 	end
 end
 
---TODO: these values need to be integrated when i remove traintypes.
 advtrains.train_accel_force=2--per second and divided by number of wagons
 advtrains.train_brake_force=3--per second, not divided by number of wagons
 advtrains.train_roll_force=0.5--per second, not divided by number of wagons, acceleration when rolling without brake
 advtrains.train_emerg_force=10--for emergency brakes(when going off track)
 
-advtrains.audit_interval=30
-
-advtrains.all_traintypes={}
-function advtrains.register_train_type(name, drives_on, max_speed)
-	advtrains.all_traintypes[name]={}
-	advtrains.all_traintypes[name].drives_on=drives_on
-	advtrains.all_traintypes[name].max_speed=max_speed or 10
-end
-
-
-advtrains.trains={}
-advtrains.wagon_save={}
-
---load initially
-advtrains.fpath=minetest.get_worldpath().."/advtrains"
-local file, err = io.open(advtrains.fpath, "r")
-if not file then
-	local er=err or "Unknown Error"
-	print("[advtrains]Failed loading advtrains save file "..er)
-else
-	local tbl = minetest.deserialize(file:read("*a"))
-	if type(tbl) == "table" then
-		advtrains.trains=tbl
-	end
-	file:close()
-end
-advtrains.fpath_ws=minetest.get_worldpath().."/advtrains_wagon_save"
-local file, err = io.open(advtrains.fpath_ws, "r")
-if not file then
-	local er=err or "Unknown Error"
-	print("[advtrains]Failed loading advtrains save file "..er)
-else
-	local tbl = minetest.deserialize(file:read("*a"))
-	if type(tbl) == "table" then
-		advtrains.wagon_save=tbl
-	end
-	file:close()
-end
+advtrains.audit_interval=10
 
 
-advtrains.save = function()
-	--print("[advtrains]saving")
-	advtrains.invalidate_all_paths()
-	local datastr = minetest.serialize(advtrains.trains)
-	if not datastr then
-		minetest.log("error", "[advtrains] Failed to serialize train data!")
-		return
-	end
-	local file, err = io.open(advtrains.fpath, "w")
-	if err then
-		return err
-	end
-	file:write(datastr)
-	file:close()
-	
-	-- update wagon saves
-	for _,wagon in pairs(minetest.luaentities) do
-		if wagon.is_wagon and wagon.initialized then
-			wagon:get_staticdata()
-		end
-	end
-	--cross out userdata
-	for w_id, data in pairs(advtrains.wagon_save) do
-		data.name=nil
-		data.object=nil
-		if data.driver then
-			data.driver_name=data.driver:get_player_name()
-			data.driver=nil
-		else
-			data.driver_name=nil
-		end
-		if data.discouple then
-			data.discouple.object:remove()
-			data.discouple=nil
-		end
-	end
-	--print(dump(advtrains.wagon_save))
-	datastr = minetest.serialize(advtrains.wagon_save)
-	if not datastr then
-		minetest.log("error", "[advtrains] Failed to serialize train data!")
-		return
-	end
-	file, err = io.open(advtrains.fpath_ws, "w")
-	if err then
-		return err
-	end
-	file:write(datastr)
-	file:close()
-	
-	advtrains.save_trackdb()
-end
-minetest.register_on_shutdown(advtrains.save)
-
 advtrains.save_and_audit_timer=advtrains.audit_interval
 minetest.register_globalstep(function(dtime)
 	advtrains.save_and_audit_timer=advtrains.save_and_audit_timer-dtime
 	if advtrains.save_and_audit_timer<=0 then
 		local t=os.clock()
-		--print("[advtrains] audit step")
-		--clean up orphaned trains
-		for k,v in pairs(advtrains.trains) do
-			--advtrains.update_trainpart_properties(k)
-			if #v.trainparts==0 then
-				print("[advtrains][train "..k.."] has empty trainparts, removing.")
-				advtrains.trains[k]=nil
-			end
-		end
 		--save
 		advtrains.save()
 		advtrains.save_and_audit_timer=advtrains.audit_interval
-		printbm("saving", t)
+		atprintbm("saving", t)
 	end
 	--regular train step
 	local t=os.clock()
@@ -163,12 +60,15 @@ minetest.register_globalstep(function(dtime)
 		advtrains.detector.finalize_restore()
 	end
 	
-	printbm("trainsteps", t)
+	atprintbm("trainsteps", t)
 	endstep()
 end)
 
 function advtrains.train_step(id, train, dtime)
-	
+	--Legacy: set drives_on and max_speed
+	if not train.drives_on or not train.max_speed then
+		advtrains.update_trainpart_properties(id)
+	end
 	--TODO check for all vars to be present
 	if not train.velocity then
 		train.velocity=0
@@ -186,7 +86,7 @@ function advtrains.train_step(id, train, dtime)
 	--if not train.last_pos then advtrains.trains[id]=nil return end
 	
 	if not advtrains.pathpredict(id, train) then 
-		print("pathpredict failed(returned false)")
+		atprint("pathpredict failed(returned false)")
 		train.velocity=0
 		train.tarvelocity=0
 		return
@@ -196,7 +96,7 @@ function advtrains.train_step(id, train, dtime)
 	if not path then
 		train.velocity=0
 		train.tarvelocity=0
-		print("train has no path for whatever reason")
+		atprint("train has no path for whatever reason")
 		return 
 	end
 	
@@ -249,26 +149,17 @@ function advtrains.train_step(id, train, dtime)
 	train.detector_old_index = math.floor(train.index)
 	train.detector_old_end_index = math.floor(train_end_index)
 	
+	--remove?
+	if #train.trainparts==0 then
+		atprint("[train "..sid(id).."] has empty trainparts, removing.")
+		advtrains.detector.leave_node(path[train.detector_old_index], id)
+		advtrains.trains[id]=nil
+		return
+	end
+	
 	if train_moves then
 		--check for collisions by finding objects
-		--front
-		local search_radius=4
 		
-		--coupling
-		local couple_outward=1
-		local posfront=advtrains.get_real_index_position(path, train.index+couple_outward)
-		local posback=advtrains.get_real_index_position(path, train_end_index-couple_outward)
-		for _,pos in ipairs({posfront, posback}) do
-			if pos then
-				local objrefs=minetest.get_objects_inside_radius(pos, search_radius)
-				for _,v in pairs(objrefs) do
-					local le=v:get_luaentity()
-					if le and le.is_wagon and le.initialized and le.train_id~=id then
-						advtrains.try_connect_trains(id, le.train_id)
-					end
-				end
-			end
-		end
 		--heh, new collision again.
 		--this time, based on NODES and the advtrains.detector.on_node table.
 		local collpos
@@ -282,61 +173,40 @@ function advtrains.train_step(id, train, dtime)
 			local rcollpos=advtrains.round_vector_floor_y(collpos)
 			for x=-1,1 do
 				for z=-1,1 do
-					local testpts=minetest.pos_to_string(vector.add(rcollpos, {x=x, y=0, z=z}))
+					local testpos=vector.add(rcollpos, {x=x, y=0, z=z})
+					local testpts=minetest.pos_to_string(testpos)
 					if advtrains.detector.on_node[testpts] and advtrains.detector.on_node[testpts]~=id then
-						--collides
-						train.recently_collided_with_env=true
-						train.velocity=0.5*train.velocity
-						train.movedir=train.movedir*-1
-						train.tarvelocity=0
+						if advtrains.trains[advtrains.detector.on_node[testpts]] then
+							--collides
+							advtrains.spawn_couple_on_collide(id, testpos, advtrains.detector.on_node[testpts], train.movedir==-1)
+							
+							train.recently_collided_with_env=true
+							train.velocity=0.5*train.velocity
+							train.movedir=train.movedir*-1
+							train.tarvelocity=0
+						else
+							--unexistant train left in this place
+							advtrains.detector.on_node[testpts]=nil
+						end
 					end
 				end
 			end
 		end
 	end
 	--check for any trainpart entities if they have been unloaded. do this only if train is near a player, to not spawn entities into unloaded areas
+	--todo function will be taken by update_trainpart_properties
 	train.check_trainpartload=(train.check_trainpartload or 0)-dtime
 	local node_range=(math.max((minetest.setting_get("active_block_range") or 0),1)*16)
 	if train.check_trainpartload<=0 then
 		local ori_pos=advtrains.get_real_index_position(path, train.index) --not much to calculate
-		print("[advtrains][train "..id.."] at "..minetest.pos_to_string(vector.round(ori_pos)))
+		--atprint("[train "..id.."] at "..minetest.pos_to_string(vector.round(ori_pos)))
 		
 		local should_check=false
 		for _,p in ipairs(minetest.get_connected_players()) do
 			should_check=should_check or ((vector.distance(ori_pos, p:getpos())<node_range))
 		end
 		if should_check then
-			--it is better to iterate luaentites only once
-			--print("check_trainpartload")
-			local found_uids={}
-			for _,wagon in pairs(minetest.luaentities) do
-				if wagon.is_wagon and wagon.initialized and wagon.train_id==id then
-					if found_uids[wagon.unique_id] then
-						--duplicate found, delete it
-						if wagon.object then wagon.object:remove() end
-					else
-						found_uids[wagon.unique_id]=true
-					end
-				end
-			end
-			--print("found_uids: "..dump(found_uids))
-			--now iterate trainparts and check. then cross them out to see if there are wagons over for any reason
-			for pit, w_id in ipairs(train.trainparts) do
-				if found_uids[w_id] then
-					--print(w_id.." still loaded")
-				elseif advtrains.wagon_save[w_id] then
-				   --print(w_id.." not loaded, but save available")
-				   --spawn a new and initialize it with the properties from wagon_save
-				   local le=minetest.add_entity(ori_pos, advtrains.wagon_save[w_id].entity_name):get_luaentity()
-				   if le then -- Don't crash if traintype has been removed
-				      le:init_from_wagon_save(w_id)
-				   end
-				else
-					print(w_id.." not loaded and no save available")
-					--what the hell...
-					table.remove(train.trainparts, pit)
-				end
-			end
+			advtrains.update_trainpart_properties(id)
 		end
 		train.check_trainpartload=2
 	end
@@ -352,6 +222,24 @@ function advtrains.train_step(id, train, dtime)
 	if train.locomotives_in_train==0 then
 		train.tarvelocity=0
 	end
+	
+	--interpret ATC command
+	if train.atc_brake_target and train.atc_brake_target>=train.velocity then
+		train.atc_brake_target=nil
+	end
+	if train.atc_wait_finish then
+		if not train.atc_brake_target and train.velocity==train.tarvelocity then
+			train.atc_wait_finish=nil
+		end
+	end
+	if train.atc_command then
+		if train.atc_delay<=0 and not train.atc_wait_finish then
+			advtrains.atc.execute_atc_command(id, train)
+		else
+			train.atc_delay=train.atc_delay-dtime
+		end
+	end
+	
 	--make brake adjust the tarvelocity if necessary
 	if train.brake and (math.ceil(train.velocity)-1)<train.tarvelocity then
 		train.tarvelocity=math.max((math.ceil(train.velocity)-1), 0)
@@ -362,24 +250,24 @@ function advtrains.train_step(id, train, dtime)
 		local mass=#train.trainparts
 		local diff=train.tarvelocity-train.velocity
 		if diff>0 then--accelerating, force will be brought on only by locomotives.
-			--print("accelerating with default force")
+			--atprint("accelerating with default force")
 			applydiff=(math.min((advtrains.train_accel_force*train.locomotives_in_train*dtime)/mass, math.abs(diff)))
 		else--decelerating
 			if front_off_track or back_off_track or train.recently_collided_with_env then --every wagon has a brake, so not divided by mass.
-				--print("braking with emergency force")
+				--atprint("braking with emergency force")
 				applydiff= -(math.min((advtrains.train_emerg_force*dtime), math.abs(diff)))
-			elseif train.brake then
-				--print("braking with default force")
+			elseif train.brake or (train.atc_brake_target and train.atc_brake_target<train.velocity) then
+				--atprint("braking with default force")
 				--no math.min, because it can grow beyond tarvelocity, see up there
 				--dont worry, it will never fall below zero.
 				applydiff= -((advtrains.train_brake_force*dtime))
 			else
-				--print("roll")
+				--atprint("roll")
 				applydiff= -(math.min((advtrains.train_roll_force*dtime), math.abs(diff)))
 			end
 		end
 		train.last_accel=(applydiff*train.movedir)
-		train.velocity=math.min(math.max( train.velocity+applydiff , 0), advtrains.all_traintypes[train.traintype].max_speed)
+		train.velocity=math.min(math.max( train.velocity+applydiff , 0), train.max_speed or 10)
 	else
 		train.last_accel=0
 	end
@@ -422,14 +310,13 @@ wagon_proto={
 ]]
 
 --returns new id
-function advtrains.create_new_train_at(pos, pos_prev, traintype)
+function advtrains.create_new_train_at(pos, pos_prev)
 	local newtrain_id=os.time()..os.clock()
 	while advtrains.trains[newtrain_id] do newtrain_id=os.time()..os.clock() end--ensure uniqueness(will be unneccessary)
 	
 	advtrains.trains[newtrain_id]={}
 	advtrains.trains[newtrain_id].last_pos=pos
 	advtrains.trains[newtrain_id].last_pos_prev=pos_prev
-	advtrains.trains[newtrain_id].traintype=traintype
 	advtrains.trains[newtrain_id].tarvelocity=0
 	advtrains.trains[newtrain_id].velocity=0
 	advtrains.trains[newtrain_id].trainparts={}
@@ -439,42 +326,44 @@ end
 --returns false on failure. handle this case!
 function advtrains.pathpredict(id, train)
 	
-	--print("pos ",x,y,z)
+	--atprint("pos ",x,y,z)
 	--::rerun::
 	if not train.index then train.index=0 end
 	if not train.path or #train.path<2 then
 		if not train.last_pos then
 			--no chance to recover
-			print("[advtrains]train hasn't saved last-pos, removing train.")
+			atprint("train hasn't saved last-pos, removing train.")
 			advtrains.train[id]=nil
 			return false
 		end
 		
-		local node_ok=advtrains.get_rail_info_at(advtrains.round_vector_floor_y(train.last_pos), train.traintype)
+		local node_ok=advtrains.get_rail_info_at(advtrains.round_vector_floor_y(train.last_pos), train.drives_on)
 		
 		if node_ok==nil then
 			--block not loaded, do nothing
+			atprint("last_pos not available")
 			return nil
 		elseif node_ok==false then
-			print("[advtrains]no track here, (fail) removing train.")
+			atprint("no track here, (fail) removing train.")
 			advtrains.trains[id]=nil
 			return false
 		end
 		
 		if not train.last_pos_prev then
 			--no chance to recover
-			print("[advtrains]train hasn't saved last-pos_prev, removing train.")
+			atprint("train hasn't saved last-pos_prev, removing train.")
 			advtrains.trains[id]=nil
 			return false
 		end
 		
-		local prevnode_ok=advtrains.get_rail_info_at(advtrains.round_vector_floor_y(train.last_pos_prev), train.traintype)
+		local prevnode_ok=advtrains.get_rail_info_at(advtrains.round_vector_floor_y(train.last_pos_prev), train.drives_on)
 		
 		if prevnode_ok==nil then
 			--block not loaded, do nothing
+			atprint("prev not available")
 			return nil
 		elseif prevnode_ok==false then
-			print("[advtrains]no track at prev, (fail) removing train.")
+			atprint("no track at prev, (fail) removing train.")
 			advtrains.trains[id]=nil
 			return false
 		end
@@ -500,34 +389,34 @@ function advtrains.pathpredict(id, train)
 	end
 	
 	
-	local maxn=advtrains.maxN(train.path)
+	local maxn=train.max_index_on_track or 0
 	while (maxn-train.index) < pregen_front do--pregenerate
-		--print("[advtrains]maxn conway for ",maxn,minetest.pos_to_string(path[maxn]),maxn-1,minetest.pos_to_string(path[maxn-1]))
-		local conway=advtrains.conway(train.path[maxn], train.path[maxn-1], train.traintype)
+		--atprint("maxn conway for ",maxn,minetest.pos_to_string(path[maxn]),maxn-1,minetest.pos_to_string(path[maxn-1]))
+		local conway=advtrains.conway(train.path[maxn], train.path[maxn-1], train.drives_on)
 		if conway then
 			train.path[maxn+1]=conway
 			train.max_index_on_track=maxn
 		else
 			--do as if nothing has happened and preceed with path
 			--but do not update max_index_on_track
-			--print("over-generating path max to index "..maxn+1)
+			atprint("over-generating path max to index "..(maxn+1).." (position "..minetest.pos_to_string(train.path[maxn]).." )")
 			train.path[maxn+1]=vector.add(train.path[maxn], vector.subtract(train.path[maxn], train.path[maxn-1]))
 		end
 		train.path_dist[maxn]=vector.distance(train.path[maxn+1], train.path[maxn])
 		maxn=advtrains.maxN(train.path)
 	end
 	
-	local minn=advtrains.minN(train.path)
+	local minn=train.min_index_on_track or 0
 	while (train.index-minn) < (train.trainlen or 0) + pregen_back do --post_generate. has to be at least trainlen. (we let go of the exact calculation here since this would be unuseful here)
-		--print("[advtrains]minn conway for ",minn,minetest.pos_to_string(path[minn]),minn+1,minetest.pos_to_string(path[minn+1]))
-		local conway=advtrains.conway(train.path[minn], train.path[minn+1], train.traintype)
+		--atprint("minn conway for ",minn,minetest.pos_to_string(path[minn]),minn+1,minetest.pos_to_string(path[minn+1]))
+		local conway=advtrains.conway(train.path[minn], train.path[minn+1], train.drives_on)
 		if conway then
 			train.path[minn-1]=conway
 			train.min_index_on_track=minn
 		else
 			--do as if nothing has happened and preceed with path
 			--but do not update min_index_on_track
-			--print("over-generating path min to index "..minn-1)
+			atprint("over-generating path min to index "..(minn-1).." (position "..minetest.pos_to_string(train.path[minn]).." )")
 			train.path[minn-1]=vector.add(train.path[minn], vector.subtract(train.path[minn], train.path[minn+1]))
 		end
 		train.path_dist[minn-1]=vector.distance(train.path[minn], train.path[minn-1])
@@ -541,12 +430,12 @@ function advtrains.pathpredict(id, train)
 		train.savedpos_off_track_index_offset=train.index-train.max_index_on_track
 		train.last_pos=train.path[train.max_index_on_track]
 		train.last_pos_prev=train.path[train.max_index_on_track-1]
-		--print("train is off-track (front), last positions kept at "..minetest.pos_to_string(train.last_pos).." / "..minetest.pos_to_string(train.last_pos_prev))
+		atprint("train is off-track (front), last positions kept at "..minetest.pos_to_string(train.last_pos).." / "..minetest.pos_to_string(train.last_pos_prev))
 	elseif train.min_index_on_track+1>train.index then --whoops, train went even more far. same behavior
 		train.savedpos_off_track_index_offset=train.index-train.min_index_on_track
 		train.last_pos=train.path[train.min_index_on_track+1]
 		train.last_pos_prev=train.path[train.min_index_on_track]
-		--print("train is off-track (back), last positions kept at "..minetest.pos_to_string(train.last_pos).." / "..minetest.pos_to_string(train.last_pos_prev))
+		atprint("train is off-track (back), last positions kept at "..minetest.pos_to_string(train.last_pos).." / "..minetest.pos_to_string(train.last_pos_prev))
 	else --regular case
 		train.savedpos_off_track_index_offset=nil
 		train.last_pos=train.path[math.floor(train.index+0.5)]
@@ -578,29 +467,61 @@ function advtrains.add_wagon_to_train(wagon, train_id, index)
 end
 function advtrains.update_trainpart_properties(train_id, invert_flipstate)
 	local train=advtrains.trains[train_id]
+	train.drives_on=advtrains.all_tracktypes
+	train.max_speed=20
 	local rel_pos=0
 	local count_l=0
 	for i, w_id in ipairs(train.trainparts) do
-		local any_loaded=false
-		for _,wagon in pairs(minetest.luaentities) do
-			if wagon.is_wagon and wagon.initialized and wagon.unique_id==w_id then
-				rel_pos=rel_pos+wagon.wagon_span
-				wagon.train_id=train_id
-				wagon.pos_in_train=rel_pos
-				wagon.pos_in_trainparts=i
-				wagon.old_velocity_vector=nil
-				if wagon.is_locomotive then
-					count_l=count_l+1
+		local wagon=nil
+		for aoid,iwagon in pairs(minetest.luaentities) do
+			if iwagon.is_wagon and iwagon.unique_id==w_id then
+				if wagon then
+					--duplicate
+					atprint("update_trainpart_properties: Removing duplicate wagon with id="..aoid)
+					iwagon.object:remove()
+				else
+					wagon=iwagon
 				end
-				if invert_flipstate then
-					wagon.wagon_flipped = not wagon.wagon_flipped
+			end
+		end
+		if not wagon then
+			if advtrains.wagon_save[w_id] then
+				--spawn a new and initialize it with the properties from wagon_save
+				wagon=minetest.env:add_entity(train.last_pos, advtrains.wagon_save[w_id].entity_name):get_luaentity()
+				if not wagon then
+					minetest.chat_send_all("[advtrains] Warning: Wagon "..advtrains.wagon_save[w_id].entity_name.." does not exist. Make sure all required modules are loaded!")
+				else
+					wagon:init_from_wagon_save(w_id)
 				end
-				rel_pos=rel_pos+wagon.wagon_span
-				any_loaded=true
 			end
 		end
-		if not any_loaded then
-			print("update_trainpart_properties wagon "..w_id.." not loaded, ignoring it.")
+		if wagon then
+			rel_pos=rel_pos+wagon.wagon_span
+			wagon.train_id=train_id
+			wagon.pos_in_train=rel_pos
+			wagon.pos_in_trainparts=i
+			wagon.old_velocity_vector=nil
+			if wagon.is_locomotive then
+				count_l=count_l+1
+			end
+			if invert_flipstate then
+				wagon.wagon_flipped = not wagon.wagon_flipped
+			end
+			rel_pos=rel_pos+wagon.wagon_span
+			any_loaded=true
+			
+			if wagon.drives_on then
+				for k,_ in pairs(train.drives_on) do
+					if not wagon.drives_on[k] then
+						train.drives_on[k]=nil
+					end
+				end
+			end
+			train.max_speed=math.min(train.max_speed, wagon.max_speed)
+		else
+			atprint(w_id.." not loaded and no save available")
+			--what the hell...
+			table.remove(train.trainparts, pit)
 		end
 	end
 	train.trainlen=rel_pos
@@ -616,28 +537,28 @@ function advtrains.split_train_at_wagon(wagon)
 	
 	--before doing anything, check if both are rails. else do not allow
 	if not pos_for_new_train then
-		print("split_train: pos_for_new_train not set")
+		atprint("split_train: pos_for_new_train not set")
 		return false
 	end
-	local node_ok=advtrains.get_rail_info_at(advtrains.round_vector_floor_y(pos_for_new_train), train.traintype)
+	local node_ok=advtrains.get_rail_info_at(advtrains.round_vector_floor_y(pos_for_new_train), train.drives_on)
 	if not node_ok then
-		print("split_train: pos_for_new_train "..minetest.pos_to_string(advtrains.round_vector_floor_y(pos_for_new_train_prev)).." not loaded or is not a rail")
+		atprint("split_train: pos_for_new_train "..minetest.pos_to_string(advtrains.round_vector_floor_y(pos_for_new_train_prev)).." not loaded or is not a rail")
 		return false
 	end
 	
 	if not train.last_pos_prev then
-		print("split_train: pos_for_new_train_prev not set")
+		atprint("split_train: pos_for_new_train_prev not set")
 		return false
 	end
 	
-	local prevnode_ok=advtrains.get_rail_info_at(advtrains.round_vector_floor_y(pos_for_new_train), train.traintype)
+	local prevnode_ok=advtrains.get_rail_info_at(advtrains.round_vector_floor_y(pos_for_new_train), train.drives_on)
 	if not prevnode_ok then
-		print("split_train: pos_for_new_train_prev "..minetest.pos_to_string(advtrains.round_vector_floor_y(pos_for_new_train_prev)).." not loaded or is not a rail")
+		atprint("split_train: pos_for_new_train_prev "..minetest.pos_to_string(advtrains.round_vector_floor_y(pos_for_new_train_prev)).." not loaded or is not a rail")
 		return false
 	end
 	
 	--create subtrain
-	local newtrain_id=advtrains.create_new_train_at(pos_for_new_train, pos_for_new_train_prev, train.traintype)
+	local newtrain_id=advtrains.create_new_train_at(pos_for_new_train, pos_for_new_train_prev)
 	local newtrain=advtrains.trains[newtrain_id]
 	--insert all wagons to new train
 	for k,v in ipairs(train.trainparts) do
@@ -661,38 +582,7 @@ end
 --->backpos's will match
 --4.   R<->F F<->R flip one of these trains and take it as new parent
 --->frontpos's will match
-function advtrains.try_connect_trains(id1, id2)
-	local train1=advtrains.trains[id1]
-	local train2=advtrains.trains[id2]
-	if not train1 or not train2 then return end
-	if not train1.path or not train2.path then return end
-	if #train1.trainparts==0 or #train2.trainparts==0 then return end
-	
-	local frontpos1=advtrains.get_real_index_position(train1.path, train1.index)
-	local backpos1=advtrains.get_real_index_position(train1.path, advtrains.get_train_end_index(train1))
-	--couple logic
-	if train1.traintype==train2.traintype then
-		local frontpos2=advtrains.get_real_index_position(train2.path, train2.index)
-		local backpos2=advtrains.get_real_index_position(train2.path, advtrains.get_train_end_index(train2))
-		
-		if not frontpos1 or not frontpos2 or not backpos1 or not backpos2 then return end
-		
-		local couple_spawnradius=0.7
-		--case 1 (first train is front)
-		if vector.distance(frontpos2, backpos1)<couple_spawnradius then
-			advtrains.spawn_couple_if_neccessary(backpos1, frontpos2, id1, id2, true, false)
-			--case 2 (second train is front)
-		elseif vector.distance(frontpos1, backpos2)<couple_spawnradius then
-			advtrains.spawn_couple_if_neccessary(backpos2, frontpos1, id2, id1, true, false)
-			--case 3 
-		elseif vector.distance(backpos2, backpos1)<couple_spawnradius then
-			advtrains.spawn_couple_if_neccessary(backpos1, backpos2, id1, id2, true, true)
-			--case 4 
-		elseif vector.distance(frontpos2, frontpos1)<couple_spawnradius then
-			advtrains.spawn_couple_if_neccessary(frontpos1, frontpos2, id1, id2, false, false)
-		end
-	end
-end
+
 --true when trains are facing each other. needed on colliding.
 -- check done by iterating paths and checking their direction
 --returns nil when not on the same track at all OR when required path items are not generated. this distinction may not always be needed.
@@ -710,72 +600,88 @@ function advtrains.trains_facing(train1, train2)
 	return nil
 end
 
---order of trains may be irrelevant in some cases. check opposite cases. TODO does this work?
---pos1 and pos2 are just needed to form a median.
-function advtrains.spawn_couple_if_neccessary(pos1, pos2, tid1, tid2, train1_is_backpos, train2_is_backpos)
-	--print("spawn_couple_if_neccessary..."..dump({pos1=pos1, pos2=pos2, train1_is_backpos=train1_is_backpos, train2_is_backpos=train2_is_backpos}))
-	local train1=advtrains.trains[tid1]
-	local train2=advtrains.trains[tid2]
+function advtrains.spawn_couple_on_collide(id1, pos, id2, t1_is_backpos)
+	atprint("COLLISION: "..sid(id1).." and "..sid(id2).." at "..minetest.pos_to_string(pos)..", t1_is_backpos="..(t1_is_backpos and "true" or "false"))
+	--TODO:
+	local train1=advtrains.trains[id1]
+	local train2=advtrains.trains[id2]
+	
+	if not train1 or not train2 then return end
+	
+	local found
+	for i=advtrains.minN(train1.path), advtrains.maxN(train1.path) do
+		if vector.equals(train1.path[i], pos) then
+			found=true
+		end
+	end
+	if not found then
+		atprint("Err: pos not in path")
+		return 
+	end
+	
+	local frontpos2=train2.path[math.floor(train2.detector_old_index)]
+	local backpos2=train2.path[math.floor(train2.detector_old_end_index)]
+	local t2_is_backpos
+	atprint("End positions: "..minetest.pos_to_string(frontpos2)..minetest.pos_to_string(backpos2))
+	
+	if vector.distance(frontpos2, pos)<2 then
+		t2_is_backpos=false
+	elseif vector.distance(backpos2, pos)<2 then
+		t2_is_backpos=true
+	else
+		atprint("Err: not a endpos")
+		return --the collision position is not the end position.
+	end
+	atprint("t2_is_backpos="..(t2_is_backpos and "true" or "false"))
+	
 	local t1_has_couple
-	if train1_is_backpos then
+	if t1_is_backpos then
 		t1_has_couple=train1.couple_eid_back
 	else
 		t1_has_couple=train1.couple_eid_front
 	end
 	local t2_has_couple
-	if train2_is_backpos then
+	if t2_is_backpos then
 		t2_has_couple=train2.couple_eid_back
 	else
 		t2_has_couple=train2.couple_eid_front
 	end
 	
-	if t1_has_couple and t2_has_couple then
-		if t1_has_couple~=t2_has_couple then--what the hell
-			if minetest.object_refs[t2_has_couple] then minetest.object_refs[t2_has_couple]:remove() end
-			if train2_is_backpos then
-				train2.couple_eid_back=t1_has_couple
+	if t1_has_couple then
+		if minetest.object_refs[t1_has_couple] then minetest.object_refs[t1_has_couple]:remove() end
+	end
+	if t2_has_couple then
+		if minetest.object_refs[t2_has_couple] then minetest.object_refs[t2_has_couple]:remove() end
+	end
+	local obj=minetest.add_entity(pos, "advtrains:couple")
+	if not obj then atprint("failed creating object") return end
+	local le=obj:get_luaentity()
+	le.train_id_1=id1
+	le.train_id_2=id2
+	le.train1_is_backpos=t1_is_backpos
+	le.train2_is_backpos=t2_is_backpos
+	--find in object_refs
+	for aoi, compare in pairs(minetest.object_refs) do
+		if compare==obj then
+			if t1_is_backpos then
+				train1.couple_eid_back=aoi
 			else
-				train2.couple_eid_front=t1_has_couple
+				train1.couple_eid_front=aoi
 			end
-		end
-	--[[elseif t1_has_couple and not t2_has_couple then
-		if train2_is_backpos then
-			train2.couple_eid_back=t1_has_couple
-		else
-			train2.couple_eid_front=t1_has_couple
-		end
-	elseif not t1_has_couple and t2_has_couple then
-		if train1_is_backpos then
-			train1.couple_eid_back=t2_has_couple
-		else
-			train1.couple_eid_front=t2_has_couple
-		end]]
-	else
-		local pos=advtrains.pos_median(pos1, pos2)
-		local obj=minetest.add_entity(pos, "advtrains:couple")
-		if not obj then print("failed creating object") return end
-		local le=obj:get_luaentity()
-		le.train_id_1=tid1
-		le.train_id_2=tid2
-		le.train1_is_backpos=train1_is_backpos
-		le.train2_is_backpos=train2_is_backpos
-		--find in object_refs
-		for aoi, compare in pairs(minetest.object_refs) do
-			if compare==obj then
-				if train1_is_backpos then
-					train1.couple_eid_back=aoi
-				else
-					train1.couple_eid_front=aoi
-				end
-				if train2_is_backpos then
-					train2.couple_eid_back=aoi
-				else
-					train2.couple_eid_front=aoi
-				end
+			if t2_is_backpos then
+				train2.couple_eid_back=aoi
+			else
+				train2.couple_eid_front=aoi
 			end
 		end
 	end
+	atprint("Couple entity:"..dump(le))
+	
+	--also TODO: integrate check_trainpartload into update_trainpart_properties. 
 end
+--order of trains may be irrelevant in some cases. check opposite cases. TODO does this work?
+--pos1 and pos2 are just needed to form a median.
+
 
 function advtrains.do_connect_trains(first_id, second_id)
 	local first_wagoncnt=#advtrains.trains[first_id].trainparts
@@ -812,20 +718,20 @@ function advtrains.invert_train(train_id)
 end
 
 function advtrains.is_train_at_pos(pos)
-	--print("istrainat: pos "..minetest.pos_to_string(pos))
+	--atprint("istrainat: pos "..minetest.pos_to_string(pos))
 	local checked_trains={}
 	local objrefs=minetest.get_objects_inside_radius(pos, 2)
 	for _,v in pairs(objrefs) do
 		local le=v:get_luaentity()
 		if le and le.is_wagon and le.initialized and le.train_id and not checked_trains[le.train_id] then
-			--print("istrainat: checking "..le.train_id)
+			--atprint("istrainat: checking "..le.train_id)
 			checked_trains[le.train_id]=true
 			local path=advtrains.get_or_create_path(le.train_id, le:train())
 			if path then
-				--print("has path")
+				--atprint("has path")
 				for i=math.floor(advtrains.get_train_end_index(le:train())+0.5),math.floor(le:train().index+0.5) do
 					if path[i] then
-						--print("has pathitem "..i.." "..minetest.pos_to_string(path[i]))
+						--atprint("has pathitem "..i.." "..minetest.pos_to_string(path[i]))
 						if vector.equals(advtrains.round_vector_floor_y(path[i]), pos) then
 							return true
 						end
@@ -837,7 +743,7 @@ function advtrains.is_train_at_pos(pos)
 	return false
 end
 function advtrains.invalidate_all_paths()
-	--print("invalidating all paths")
+	--atprint("invalidating all paths")
 	for k,v in pairs(advtrains.trains) do
 		if v.index then
 			v.restore_add_index=v.index-math.floor(v.index+0.5)
diff --git a/wagons.lua b/advtrains/advtrains/wagons.lua
index 8a96c39..029d2d1 100644
--- a/wagons.lua
+++ b/advtrains/advtrains/wagons.lua
@@ -1,6 +1,4 @@
 --atan2 counts angles clockwise, minetest does counterclockwise
---local print=function(t) minetest.log("action", t) minetest.chat_send_all(t) end
-local print=function() end
 
 minetest.register_privilege("train_place", {
 	description = "Player can place trains on tracks not owned by player",
@@ -58,7 +56,7 @@ end
 	wagon will save only uid in staticdata, no serialized table
 ]]
 function wagon:on_activate(sd_uid, dtime_s)
-	print("[advtrains][wagon "..((sd_uid and sd_uid~="" and sd_uid) or "no-id").."] activated")
+	atprint("[wagon "..((sd_uid and sd_uid~="" and sd_uid) or "no-id").."] activated")
 	self.object:set_armor_groups({immortal=1})
 	if sd_uid and sd_uid~="" then
 		--legacy
@@ -74,7 +72,7 @@ function wagon:on_activate(sd_uid, dtime_s)
 	--duplicates?
 	for ao_id,wagon in pairs(minetest.luaentities) do
 		if wagon.is_wagon and wagon.initialized and wagon.unique_id==self.unique_id and wagon~=self then--i am a duplicate!
-			print("[advtrains][wagon "..((sd_uid and sd_uid~="" and sd_uid) or "no-id").."] duplicate found(ao_id:"..ao_id.."), removing")
+			atprint("[wagon "..((sd_uid and sd_uid~="" and sd_uid) or "no-id").."] duplicate found(ao_id:"..ao_id.."), removing")
 			self.object:remove()
 			minetest.after(0.5, function() advtrains.update_trainpart_properties(self.train_id) end)
 			return
@@ -82,13 +80,13 @@ function wagon:on_activate(sd_uid, dtime_s)
 	end
 	
 	if self.custom_on_activate then
-		self:custom_on_activate(staticdata_table, dtime_s)
+		self:custom_on_activate(dtime_s)
 	end
 end
 
 function wagon:get_staticdata()
 	if not self:ensure_init() then return end
-	print("[advtrains][wagon "..((self.unique_id and self.unique_id~="" and self.unique_id) or "no-id").."]: saving to wagon_save")
+	atprint("[wagon "..((self.unique_id and self.unique_id~="" and self.unique_id) or "no-id").."]: saving to wagon_save")
 	--serialize inventory, if it has one
 	if self.has_inventory then
 		local inv=minetest.get_inventory({type="detached", name="advtrains_wgn_"..self.unique_id})
@@ -112,7 +110,7 @@ function wagon:init_new_instance(train_id, properties)
 	end
 	self:init_shared()
 	self.initialized=true
-	print("init_new_instance "..self.unique_id.." ("..self.train_id..")")
+	atprint("init_new_instance "..self.unique_id.." ("..self.train_id..")")
 	return self.unique_id
 end
 function wagon:init_from_wagon_save(uid)
@@ -133,7 +131,7 @@ function wagon:init_from_wagon_save(uid)
 	self:init_shared()
 	self.initialized=true
 	minetest.after(1, function() self:reattach_all() end)
-	print("init_from_wagon_save "..self.unique_id.." ("..self.train_id..")")
+	atprint("init_from_wagon_save "..self.unique_id.." ("..self.train_id..")")
 	advtrains.update_trainpart_properties(self.train_id)
 end
 function wagon:init_shared()
@@ -162,8 +160,17 @@ function wagon:init_shared()
 	end
 end
 function wagon:ensure_init()
-	if self.initialized then return true end
-	self.object:setvelocity({x=0,y=0,z=0})
+	if self.initialized then
+		if self.noninitticks then self.noninitticks=nil end
+		return true
+	end
+	if not self.noninitticks then self.noninitticks=0 end
+	self.noninitticks=self.noninitticks+1
+	if self.noninitticks>20 then
+		self.object:remove()
+	else
+		self.object:setvelocity({x=0,y=0,z=0})
+	end
 	return false
 end
 
@@ -220,7 +227,7 @@ function wagon:destroy()
 		self.custom_on_destroy(self, puncher, time_from_last_punch, tool_capabilities, direction)
 	end
 	
-	print("[advtrains][wagon "..((self.unique_id and self.unique_id~="" and self.unique_id) or "no-id").."]: destroying")
+	atprint("[wagon "..((self.unique_id and self.unique_id~="" and self.unique_id) or "no-id").."]: destroying")
 	
 	self.object:remove()
 
@@ -239,7 +246,7 @@ function wagon:on_step(dtime)
 	local pos = self.object:getpos()
 	
 	if not pos then
-		print("["..self.unique_id.."][fatal] missing position (object:getpos() returned nil)")
+		atprint("["..self.unique_id.."][fatal] missing position (object:getpos() returned nil)")
 		return
 	end
 
@@ -247,7 +254,7 @@ function wagon:on_step(dtime)
 	
 	--is my train still here
 	if not self.train_id or not self:train() then
-		print("[advtrains][wagon "..self.unique_id.."] missing train_id, destroying")
+		atprint("[wagon "..self.unique_id.."] missing train_id, destroying")
 		self.object:remove()
 		return
 	elseif not self.initialized then
@@ -301,7 +308,7 @@ function wagon:on_step(dtime)
 					--object:set_attach(self.object, "", {x=0, y=0, z=self.wagon_span*10}, {x=0, y=0, z=0})
 					self.discouple=le
 				else
-					print("Couldn't spawn DisCouple")
+					atprint("Couldn't spawn DisCouple")
 				end
 			end
 		else
@@ -322,13 +329,13 @@ function wagon:on_step(dtime)
 	end
 	
 	local index=advtrains.get_real_path_index(self:train(), self.pos_in_train)
-	--print("trainindex "..gp.index.." wagonindex "..index)
+	--atprint("trainindex "..gp.index.." wagonindex "..index)
 	
 	--position recalculation
 	local first_pos=gp.path[math.floor(index)]
 	local second_pos=gp.path[math.floor(index)+1]
 	if not first_pos or not second_pos then
-		--print("[advtrains] object "..self.unique_id.." path end reached!")
+		--atprint(" object "..self.unique_id.." path end reached!")
 		self.object:setvelocity({x=0,y=0,z=0})
 		return
 	end
@@ -396,7 +403,7 @@ function wagon:on_step(dtime)
 	self.old_velocity_vector=velocityvec
 	self.old_acceleration_vector=accelerationvec
 	self.old_yaw=yaw
-	printbm("wagon step", t)
+	atprintbm("wagon step", t)
 end
 
 function advtrains.get_real_path_index(train, pit)
@@ -469,7 +476,7 @@ function wagon:show_get_on_form(pname)
 	if not self.initialized then return end
 	if #self.seats==0 then
 		if self.has_inventory and self.get_inventory_formspec then
-			minetest.show_formspec(pname, "advtrains_inv_"..self.unique_id, self:get_inventory_formspec())
+			minetest.show_formspec(pname, "advtrains_inv_"..self.unique_id, self:get_inventory_formspec(pname))
 		end
 		return
 	end
@@ -496,11 +503,11 @@ minetest.register_on_player_receive_fields(function(player, formname, fields)
 			if wagon.is_wagon and wagon.initialized and wagon.unique_id==uid then
 				if fields.inv then
 					if wagon.has_inventory and wagon.get_inventory_formspec then
-						minetest.show_formspec(player:get_player_name(), "advtrains_inv_"..uid, wagon:get_inventory_formspec())
+						minetest.show_formspec(player:get_player_name(), "advtrains_inv_"..uid, wagon:get_inventory_formspec(player:get_player_name()))
 					end
 				elseif fields.seat then
 					local val=minetest.explode_textlist_event(fields.seat)
-					if val and val.type~="INV" then
+					if val and val.type~="INV" and not wagon.seatp[player:get_player_name()] then
 					--get on
 						wagon:get_on(player, val.index)
 						--will work with the new close_formspec functionality. close exactly this formspec.
@@ -528,11 +535,11 @@ minetest.register_on_joinplayer(function(player)
 	end
 end)
 
-function advtrains.register_wagon(sysname, traintype, prototype, desc, inv_img)
+function advtrains.register_wagon(sysname, prototype, desc, inv_img)
 	setmetatable(prototype, {__index=wagon})
-	minetest.register_entity("advtrains:"..sysname,prototype)
+	minetest.register_entity(":advtrains:"..sysname,prototype)
 	
-	minetest.register_craftitem("advtrains:"..sysname, {
+	minetest.register_craftitem(":advtrains:"..sysname, {
 		description = desc,
 		inventory_image = inv_img,
 		wield_image = inv_img,
@@ -543,19 +550,20 @@ function advtrains.register_wagon(sysname, traintype, prototype, desc, inv_img)
 				return
 			end
 			
+
 			local node=minetest.get_node_or_nil(pointed_thing.under)
-			if not node then print("[advtrains]Ignore at placer position") return itemstack end
+			if not node then atprint("[advtrains]Ignore at placer position") return itemstack end
 			local nodename=node.name
-			if(not advtrains.is_track_and_drives_on(nodename, advtrains.all_traintypes[traintype].drives_on)) then
-				print("[advtrains]no track here, not placing.")
+			if(not advtrains.is_track_and_drives_on(nodename, prototype.drives_on)) then
+				atprint("no track here, not placing.")
 				return itemstack
 			end
 			local conn1=advtrains.get_track_connections(node.name, node.param2)
-			local id=advtrains.create_new_train_at(pointed_thing.under, advtrains.dirCoordSet(pointed_thing.under, conn1), traintype)
+			local id=advtrains.create_new_train_at(pointed_thing.under, advtrains.dirCoordSet(pointed_thing.under, conn1))
 			
 			local ob=minetest.add_entity(pointed_thing.under, "advtrains:"..sysname)
 			if not ob then
-				print("[advtrains]couldn't add_entity, aborting")
+				atprint("couldn't add_entity, aborting")
 			end
 			local le=ob:get_luaentity()
 			
@@ -573,227 +581,10 @@ function advtrains.register_wagon(sysname, traintype, prototype, desc, inv_img)
 		end,
 	})
 end
-advtrains.register_train_type("steam", {"regular", "default"})
-
---[[advtrains.register_wagon("blackwagon", "steam",{textures = {"black.png"}})
-advtrains.register_wagon("bluewagon", "steam",{textures = {"blue.png"}})
-advtrains.register_wagon("greenwagon", "steam",{textures = {"green.png"}})
-advtrains.register_wagon("redwagon", "steam",{textures = {"red.png"}})
-advtrains.register_wagon("yellowwagon", "steam",{textures = {"yellow.png"}})
-]]
 
 --[[
 	wagons can define update_animation(self, velocity) if they have a speed-dependent animation
 	this function will be called when the velocity vector changes or every 2 seconds.
 ]]
-advtrains.register_wagon("newlocomotive", "steam",{
-	mesh="advtrains_engine_steam.b3d",
-	textures = {"advtrains_newlocomotive.png"},
-	is_locomotive=true,
-	seats = {
-		{
-			name="Driver Stand (left)",
-			attach_offset={x=-5, y=10, z=-10},
-			view_offset={x=0, y=6, z=0},
-			driving_ctrl_access=true,
-		},
-		{
-			name="Driver Stand (right)",
-			attach_offset={x=5, y=10, z=-10},
-			view_offset={x=0, y=6, z=0},
-			driving_ctrl_access=true,
-		},
-	},
-	visual_size = {x=1, y=1},
-	wagon_span=1.85,
-	collisionbox = {-1.0,-0.5,-1.0, 1.0,2.5,1.0},
-	update_animation=function(self, velocity)
-		--if self.old_anim_velocity~=advtrains.abs_ceil(velocity) then
-			self.object:set_animation({x=1,y=60}, 100)--math.floor(velocity))
-			--self.old_anim_velocity=advtrains.abs_ceil(velocity)
-		--end
-	end,
-	custom_on_activate = function(self, staticdata_table, dtime_s)
-		minetest.add_particlespawner({
-			amount = 10,
-			time = 0,
-		--  ^ If time is 0 has infinite lifespan and spawns the amount on a per-second base
-			minpos = {x=0, y=2, z=1.2},
-			maxpos = {x=0, y=2, z=1.2},
-			minvel = {x=-0.2, y=1.8, z=-0.2},
-			maxvel = {x=0.2, y=2, z=0.2},
-			minacc = {x=0, y=-0.1, z=0},
-			maxacc = {x=0, y=-0.3, z=0},
-			minexptime = 2,
-			maxexptime = 4,
-			minsize = 1,
-			maxsize = 5,
-		--  ^ The particle's properties are random values in between the bounds:
-		--  ^ minpos/maxpos, minvel/maxvel (velocity), minacc/maxacc (acceleration),
-		--  ^ minsize/maxsize, minexptime/maxexptime (expirationtime)
-			collisiondetection = true,
-		--  ^ collisiondetection: if true uses collision detection
-			vertical = false,
-		--  ^ vertical: if true faces player using y axis only
-			texture = "smoke_puff.png",
-		--  ^ Uses texture (string)
-			attached = self.object,
-		})
-	end,
-	drops={"default:steelblock 4"},
-}, "Steam Engine", "advtrains_newlocomotive_inv.png")
-advtrains.register_wagon("wagon_default", "steam",{
-	mesh="advtrains_wagon.b3d",
-	textures = {"advtrains_wagon.png"},
-	seats = {
-		{
-			name="Default Seat",
-			attach_offset={x=0, y=10, z=0},
-			view_offset={x=0, y=6, z=0},
-		},
-	},
-	visual_size = {x=1, y=1},
-	wagon_span=1.8,
-	collisionbox = {-1.0,-0.5,-1.0, 1.0,2.5,1.0},
-	drops={"default:steelblock 4"},
-}, "Passenger Wagon", "advtrains_wagon_inv.png")
-advtrains.register_wagon("wagon_box", "steam",{
-	mesh="advtrains_wagon.b3d",
-	textures = {"advtrains_wagon_box.png"},
-	seats = {},
-	visual_size = {x=1, y=1},
-	wagon_span=1.8,
-	collisionbox = {-1.0,-0.5,-1.0, 1.0,2.5,1.0},
-	drops={"default:steelblock 4"},
-	has_inventory = true,
-	get_inventory_formspec = function(self)
-		return "size[8,11]"..
-			"list[detached:advtrains_wgn_"..self.unique_id..";box;0,0;8,6;]"..
-			"list[current_player;main;0,7;8,4;]"..
-			"listring[]"
-	end,
-	inventory_list_sizes = {
-		box=8*6,
-	},
-}, "Box Wagon", "advtrains_wagon_box_inv.png")
-
-advtrains.register_train_type("electric", {"regular", "default"}, 20)
-
-advtrains.register_wagon("engine_japan", "electric",{
-	mesh="advtrains_engine_japan.b3d",
-	textures = {"advtrains_engine_japan.png"},
-	seats = {
-		{
-			name="Default Seat (driver stand)",
-			attach_offset={x=0, y=10, z=0},
-			view_offset={x=0, y=6, z=0},
-			driving_ctrl_access=true,
-		},
-	},
-	visual_size = {x=1, y=1},
-	wagon_span=2.5,
-	is_locomotive=true,
-	collisionbox = {-1.0,-0.5,-1.0, 1.0,2.5,1.0},
-	drops={"default:steelblock 4"},
-}, "Japanese Train Engine", "advtrains_engine_japan_inv.png")
-
-advtrains.register_wagon("wagon_japan", "electric",{
-	mesh="advtrains_wagon_japan.b3d",
-	textures = {"advtrains_wagon_japan.png"},
-	seats = {
-		{
-			name="Default Seat",
-			attach_offset={x=0, y=10, z=0},
-			view_offset={x=0, y=6, z=0},
-		},
-	},
-	visual_size = {x=1, y=1},
-	wagon_span=2.3,
-	collisionbox = {-1.0,-0.5,-1.0, 1.0,2.5,1.0},
-	drops={"default:steelblock 4"},
-}, "Japanese Train Wagon", "advtrains_wagon_japan_inv.png")
-
-advtrains.register_wagon("engine_industrial", "electric",{
-	mesh="advtrains_engine_industrial.b3d",
-	textures = {"advtrains_engine_industrial.png"},
-	seats = {
-		{
-			name="Driver Stand (left)",
-			attach_offset={x=-5, y=10, z=-10},
-			view_offset={x=0, y=10, z=0},
-			driving_ctrl_access=true,
-		},
-		{
-			name="Driver Stand (right)",
-			attach_offset={x=5, y=10, z=-10},
-			view_offset={x=0, y=10, z=0},
-			driving_ctrl_access=true,
-		},
-	},
-	visual_size = {x=1, y=1},
-	wagon_span=2.6,
-	is_locomotive=true,
-	collisionbox = {-1.0,-0.5,-1.0, 1.0,2.5,1.0},
-	drops={"default:steelblock 4"},
-}, "Industrial Train Engine", "advtrains_engine_industrial_inv.png")
-advtrains.register_wagon("wagon_tank", "electric",{
-	mesh="advtrains_wagon_tank.b3d",
-	textures = {"advtrains_wagon_tank.png"},
-	seats = {},
-	visual_size = {x=1, y=1},
-	wagon_span=2.2,
-	collisionbox = {-1.0,-0.5,-1.0, 1.0,2.5,1.0},
-	drops={"default:steelblock 4"},
-	has_inventory = true,
-	get_inventory_formspec = function(self)
-		return "size[8,11]"..
-			"list[detached:advtrains_wgn_"..self.unique_id..";box;0,0;8,6;]"..
-			"list[current_player;main;0,7;8,4;]"..
-			"listring[]"
-	end,
-	inventory_list_sizes = {
-		box=8*6,
-	},
-}, "Industrial tank wagon", "advtrains_wagon_tank_inv.png")
-advtrains.register_wagon("wagon_wood", "electric",{
-	mesh="advtrains_wagon_wood.b3d",
-	textures = {"advtrains_wagon_wood.png"},
-	seats = {},
-	visual_size = {x=1, y=1},
-	wagon_span=1.8,
-	collisionbox = {-1.0,-0.5,-1.0, 1.0,2.5,1.0},
-	drops={"default:steelblock 4"},
-	has_inventory = true,
-	get_inventory_formspec = function(self)
-		return "size[8,11]"..
-			"list[detached:advtrains_wgn_"..self.unique_id..";box;0,0;8,6;]"..
-			"list[current_player;main;0,7;8,4;]"..
-			"listring[]"
-	end,
-	inventory_list_sizes = {
-		box=8*6,
-	},
-}, "Industrial wood wagon", "advtrains_wagon_wood_inv.png")
-
-advtrains.register_train_type("subway", {"default"}, 15)
-
-advtrains.register_wagon("subway_wagon", "subway",{
-	mesh="advtrains_subway_train.b3d",
-	textures = {"advtrains_subway_train.png"},
-	seats = {
-		{
-			name="Default Seat (driver stand)",
-			attach_offset={x=0, y=10, z=0},
-			view_offset={x=0, y=6, z=0},
-			driving_ctrl_access=true,
-		},
-	},
-	visual_size = {x=1, y=1},
-	wagon_span=1.8,
-	collisionbox = {-1.0,-0.5,-1.0, 1.0,2.5,1.0},
-	is_locomotive=true,
-	drops={"default:steelblock 4"},
-}, "Subway Passenger Wagon", "advtrains_subway_train_inv.png")
-
 
 
diff --git a/advtrains/advtrains_train_industrial/depends.txt b/advtrains/advtrains_train_industrial/depends.txt
new file mode 100644
index 0000000..6f00bf6
--- /dev/null
+++ b/advtrains/advtrains_train_industrial/depends.txt
@@ -0,0 +1 @@
+advtrains
+\ No newline at end of file
diff --git a/advtrains/advtrains_train_industrial/init.lua b/advtrains/advtrains_train_industrial/init.lua
new file mode 100644
index 0000000..379832c
--- /dev/null
+++ b/advtrains/advtrains_train_industrial/init.lua
@@ -0,0 +1,67 @@
+advtrains.register_wagon("engine_industrial", {
+	mesh="advtrains_engine_industrial.b3d",
+	textures = {"advtrains_engine_industrial.png"},
+	drives_on={default=true},
+	max_speed=20,
+	seats = {
+		{
+			name="Driver Stand (left)",
+			attach_offset={x=-5, y=10, z=-10},
+			view_offset={x=0, y=10, z=0},
+			driving_ctrl_access=true,
+		},
+		{
+			name="Driver Stand (right)",
+			attach_offset={x=5, y=10, z=-10},
+			view_offset={x=0, y=10, z=0},
+			driving_ctrl_access=true,
+		},
+	},
+	visual_size = {x=1, y=1},
+	wagon_span=2.6,
+	is_locomotive=true,
+	collisionbox = {-1.0,-0.5,-1.0, 1.0,2.5,1.0},
+	drops={"default:steelblock 4"},
+}, "Industrial Train Engine", "advtrains_engine_industrial_inv.png")
+advtrains.register_wagon("wagon_tank", {
+	mesh="advtrains_wagon_tank.b3d",
+	textures = {"advtrains_wagon_tank.png"},
+	seats = {},
+	drives_on={default=true},
+	max_speed=20,
+	visual_size = {x=1, y=1},
+	wagon_span=2.2,
+	collisionbox = {-1.0,-0.5,-1.0, 1.0,2.5,1.0},
+	drops={"default:steelblock 4"},
+	has_inventory = true,
+	get_inventory_formspec = function(self)
+		return "size[8,11]"..
+			"list[detached:advtrains_wgn_"..self.unique_id..";box;0,0;8,6;]"..
+			"list[current_player;main;0,7;8,4;]"..
+			"listring[]"
+	end,
+	inventory_list_sizes = {
+		box=8*6,
+	},
+}, "Industrial tank wagon", "advtrains_wagon_tank_inv.png")
+advtrains.register_wagon("wagon_wood", {
+	mesh="advtrains_wagon_wood.b3d",
+	textures = {"advtrains_wagon_wood.png"},
+	seats = {},
+	drives_on={default=true},
+	max_speed=20,
+	visual_size = {x=1, y=1},
+	wagon_span=1.8,
+	collisionbox = {-1.0,-0.5,-1.0, 1.0,2.5,1.0},
+	drops={"default:steelblock 4"},
+	has_inventory = true,
+	get_inventory_formspec = function(self)
+		return "size[8,11]"..
+			"list[detached:advtrains_wgn_"..self.unique_id..";box;0,0;8,6;]"..
+			"list[current_player;main;0,7;8,4;]"..
+			"listring[]"
+	end,
+	inventory_list_sizes = {
+		box=8*6,
+	},
+}, "Industrial wood wagon", "advtrains_wagon_wood_inv.png")
diff --git a/models/advtrains_engine_industrial.b3d b/advtrains/advtrains_train_industrial/models/advtrains_engine_industrial.b3d
index f1ea485..f1ea485 100644
--- a/models/advtrains_engine_industrial.b3d
+++ b/advtrains/advtrains_train_industrial/models/advtrains_engine_industrial.b3d
diff --git a/models/advtrains_wagon_tank.b3d b/advtrains/advtrains_train_industrial/models/advtrains_wagon_tank.b3d
index af2604b..af2604b 100644
--- a/models/advtrains_wagon_tank.b3d
+++ b/advtrains/advtrains_train_industrial/models/advtrains_wagon_tank.b3d
diff --git a/models/advtrains_wagon_wood.b3d b/advtrains/advtrains_train_industrial/models/advtrains_wagon_wood.b3d
index 0e7fb4b..0e7fb4b 100644
--- a/models/advtrains_wagon_wood.b3d
+++ b/advtrains/advtrains_train_industrial/models/advtrains_wagon_wood.b3d
diff --git a/textures/advtrains_engine_industrial.png b/advtrains/advtrains_train_industrial/textures/advtrains_engine_industrial.png
index 38a872f..38a872f 100644
--- a/textures/advtrains_engine_industrial.png
+++ b/advtrains/advtrains_train_industrial/textures/advtrains_engine_industrial.png
diff --git a/textures/advtrains_engine_industrial_inv.png b/advtrains/advtrains_train_industrial/textures/advtrains_engine_industrial_inv.png
index be4e80f..be4e80f 100644
--- a/textures/advtrains_engine_industrial_inv.png
+++ b/advtrains/advtrains_train_industrial/textures/advtrains_engine_industrial_inv.png
diff --git a/textures/advtrains_wagon_tank.png b/advtrains/advtrains_train_industrial/textures/advtrains_wagon_tank.png
index 79b1316..79b1316 100644
--- a/textures/advtrains_wagon_tank.png
+++ b/advtrains/advtrains_train_industrial/textures/advtrains_wagon_tank.png
diff --git a/textures/advtrains_wagon_tank_inv.png b/advtrains/advtrains_train_industrial/textures/advtrains_wagon_tank_inv.png
index 03401be..03401be 100644
--- a/textures/advtrains_wagon_tank_inv.png
+++ b/advtrains/advtrains_train_industrial/textures/advtrains_wagon_tank_inv.png
diff --git a/textures/advtrains_wagon_wood.png b/advtrains/advtrains_train_industrial/textures/advtrains_wagon_wood.png
index acc6f72..acc6f72 100644
--- a/textures/advtrains_wagon_wood.png
+++ b/advtrains/advtrains_train_industrial/textures/advtrains_wagon_wood.png
diff --git a/textures/advtrains_wagon_wood_inv.png b/advtrains/advtrains_train_industrial/textures/advtrains_wagon_wood_inv.png
index 87109dd..87109dd 100644
--- a/textures/advtrains_wagon_wood_inv.png
+++ b/advtrains/advtrains_train_industrial/textures/advtrains_wagon_wood_inv.png
diff --git a/advtrains/advtrains_train_japan/depends.txt b/advtrains/advtrains_train_japan/depends.txt
new file mode 100644
index 0000000..6f00bf6
--- /dev/null
+++ b/advtrains/advtrains_train_japan/depends.txt
@@ -0,0 +1 @@
+advtrains
+\ No newline at end of file
diff --git a/advtrains/advtrains_train_japan/init.lua b/advtrains/advtrains_train_japan/init.lua
new file mode 100644
index 0000000..47f50cf
--- /dev/null
+++ b/advtrains/advtrains_train_japan/init.lua
@@ -0,0 +1,38 @@
+advtrains.register_wagon("engine_japan", {
+	mesh="advtrains_engine_japan.b3d",
+	textures = {"advtrains_engine_japan.png"},
+	drives_on={default=true},
+	max_speed=20,
+	seats = {
+		{
+			name="Default Seat (driver stand)",
+			attach_offset={x=0, y=10, z=0},
+			view_offset={x=0, y=6, z=0},
+			driving_ctrl_access=true,
+		},
+	},
+	visual_size = {x=1, y=1},
+	wagon_span=2.5,
+	is_locomotive=true,
+	collisionbox = {-1.0,-0.5,-1.0, 1.0,2.5,1.0},
+	drops={"default:steelblock 4"},
+}, "Japanese Train Engine", "advtrains_engine_japan_inv.png")
+
+advtrains.register_wagon("wagon_japan", {
+	mesh="advtrains_wagon_japan.b3d",
+	textures = {"advtrains_wagon_japan.png"},
+	drives_on={default=true},
+	max_speed=20,
+	seats = {
+		{
+			name="Default Seat",
+			attach_offset={x=0, y=10, z=0},
+			view_offset={x=0, y=6, z=0},
+		},
+	},
+	visual_size = {x=1, y=1},
+	wagon_span=2.3,
+	collisionbox = {-1.0,-0.5,-1.0, 1.0,2.5,1.0},
+	drops={"default:steelblock 4"},
+}, "Japanese Train Wagon", "advtrains_wagon_japan_inv.png")
+
diff --git a/models/advtrains_engine_japan.b3d b/advtrains/advtrains_train_japan/models/advtrains_engine_japan.b3d
index f82c33e..f82c33e 100644
--- a/models/advtrains_engine_japan.b3d
+++ b/advtrains/advtrains_train_japan/models/advtrains_engine_japan.b3d
diff --git a/models/advtrains_wagon_japan.b3d b/advtrains/advtrains_train_japan/models/advtrains_wagon_japan.b3d
index 7970438..7970438 100644
--- a/models/advtrains_wagon_japan.b3d
+++ b/advtrains/advtrains_train_japan/models/advtrains_wagon_japan.b3d
diff --git a/textures/advtrains_engine_japan.png b/advtrains/advtrains_train_japan/textures/advtrains_engine_japan.png
index b286b38..b286b38 100644
--- a/textures/advtrains_engine_japan.png
+++ b/advtrains/advtrains_train_japan/textures/advtrains_engine_japan.png
diff --git a/textures/advtrains_engine_japan_inv.png b/advtrains/advtrains_train_japan/textures/advtrains_engine_japan_inv.png
index 6af0636..6af0636 100644
--- a/textures/advtrains_engine_japan_inv.png
+++ b/advtrains/advtrains_train_japan/textures/advtrains_engine_japan_inv.png
diff --git a/textures/advtrains_wagon_japan.png b/advtrains/advtrains_train_japan/textures/advtrains_wagon_japan.png
index bee565e..bee565e 100644
--- a/textures/advtrains_wagon_japan.png
+++ b/advtrains/advtrains_train_japan/textures/advtrains_wagon_japan.png
diff --git a/textures/advtrains_wagon_japan_inv.png b/advtrains/advtrains_train_japan/textures/advtrains_wagon_japan_inv.png
index 3e6357c..3e6357c 100644
--- a/textures/advtrains_wagon_japan_inv.png
+++ b/advtrains/advtrains_train_japan/textures/advtrains_wagon_japan_inv.png
diff --git a/advtrains/advtrains_train_steam/depends.txt b/advtrains/advtrains_train_steam/depends.txt
new file mode 100644
index 0000000..6f00bf6
--- /dev/null
+++ b/advtrains/advtrains_train_steam/depends.txt
@@ -0,0 +1 @@
+advtrains
+\ No newline at end of file
diff --git a/advtrains/advtrains_train_steam/init.lua b/advtrains/advtrains_train_steam/init.lua
new file mode 100644
index 0000000..22f525f
--- /dev/null
+++ b/advtrains/advtrains_train_steam/init.lua
@@ -0,0 +1,196 @@
+advtrains.register_wagon("newlocomotive", {
+	mesh="advtrains_engine_steam.b3d",
+	textures = {"advtrains_engine_steam.png"},
+	is_locomotive=true,
+	drives_on={default=true},
+	max_speed=10,
+	seats = {
+		{
+			name="Driver Stand (left)",
+			attach_offset={x=-5, y=10, z=-10},
+			view_offset={x=0, y=6, z=0},
+			driving_ctrl_access=true,
+		},
+		{
+			name="Driver Stand (right)",
+			attach_offset={x=5, y=10, z=-10},
+			view_offset={x=0, y=6, z=0},
+			driving_ctrl_access=true,
+		},
+	},
+	visual_size = {x=1, y=1},
+	wagon_span=1.85,
+	collisionbox = {-1.0,-0.5,-1.0, 1.0,2.5,1.0},
+	update_animation=function(self, velocity)
+		if self.old_anim_velocity~=advtrains.abs_ceil(velocity) then
+			self.object:set_animation({x=1,y=80}, advtrains.abs_ceil(velocity)*15, 0, true)
+			self.old_anim_velocity=advtrains.abs_ceil(velocity)
+		end
+	end,
+	custom_on_activate = function(self, staticdata_table, dtime_s)
+		minetest.add_particlespawner({
+			amount = 10,
+			time = 0,
+		--  ^ If time is 0 has infinite lifespan and spawns the amount on a per-second base
+			minpos = {x=0, y=2, z=1.2},
+			maxpos = {x=0, y=2, z=1.2},
+			minvel = {x=-0.2, y=1.8, z=-0.2},
+			maxvel = {x=0.2, y=2, z=0.2},
+			minacc = {x=0, y=-0.1, z=0},
+			maxacc = {x=0, y=-0.3, z=0},
+			minexptime = 2,
+			maxexptime = 4,
+			minsize = 1,
+			maxsize = 5,
+		--  ^ The particle's properties are random values in between the bounds:
+		--  ^ minpos/maxpos, minvel/maxvel (velocity), minacc/maxacc (acceleration),
+		--  ^ minsize/maxsize, minexptime/maxexptime (expirationtime)
+			collisiondetection = true,
+		--  ^ collisiondetection: if true uses collision detection
+			vertical = false,
+		--  ^ vertical: if true faces player using y axis only
+			texture = "smoke_puff.png",
+		--  ^ Uses texture (string)
+			attached = self.object,
+		})
+	end,
+	drops={"default:steelblock 4"},
+}, "Steam Engine", "advtrains_engine_steam_inv.png")
+
+advtrains.register_wagon("detailed_steam_engine", {
+	mesh="advtrains_detailed_steam_engine.b3d",
+	textures = {"advtrains_detailed_steam_engine.png"},
+	is_locomotive=true,
+	drives_on={default=true},
+	max_speed=10,
+	seats = {
+		{
+			name="Driver Stand (left)",
+			attach_offset={x=-5, y=10, z=-10},
+			view_offset={x=0, y=6, z=0},
+			driving_ctrl_access=true,
+		},
+		{
+			name="Driver Stand (right)",
+			attach_offset={x=5, y=10, z=-10},
+			view_offset={x=0, y=6, z=0},
+			driving_ctrl_access=true,
+		},
+	},
+	visual_size = {x=1, y=1},
+	wagon_span=2.05,
+	collisionbox = {-1.0,-0.5,-1.0, 1.0,2.5,1.0},
+	update_animation=function(self, velocity)
+		if self.old_anim_velocity~=advtrains.abs_ceil(velocity) then
+			self.object:set_animation({x=1,y=80}, advtrains.abs_ceil(velocity)*15, 0, true)
+			self.old_anim_velocity=advtrains.abs_ceil(velocity)
+		end
+	end,
+	custom_on_activate = function(self, staticdata_table, dtime_s)
+		minetest.add_particlespawner({
+			amount = 10,
+			time = 0,
+		--  ^ If time is 0 has infinite lifespan and spawns the amount on a per-second base
+			minpos = {x=0, y=2.3, z=1.45},
+			maxpos = {x=0, y=2.3, z=1.4},
+			minvel = {x=-0.2, y=1.8, z=-0.2},
+			maxvel = {x=0.2, y=2, z=0.2},
+			minacc = {x=0, y=-0.1, z=0},
+			maxacc = {x=0, y=-0.3, z=0},
+			minexptime = 2,
+			maxexptime = 4,
+			minsize = 1,
+			maxsize = 5,
+		--  ^ The particle's properties are random values in between the bounds:
+		--  ^ minpos/maxpos, minvel/maxvel (velocity), minacc/maxacc (acceleration),
+		--  ^ minsize/maxsize, minexptime/maxexptime (expirationtime)
+			collisiondetection = true,
+		--  ^ collisiondetection: if true uses collision detection
+			vertical = false,
+		--  ^ vertical: if true faces player using y axis only
+			texture = "smoke_puff.png",
+		--  ^ Uses texture (string)
+			attached = self.object,
+		})
+	end,
+	drops={"default:steelblock 4"},
+}, "Detailed Steam Engine", "advtrains_engine_steam_inv.png")
+
+advtrains.register_wagon("wagon_default", {
+	mesh="advtrains_passenger_wagon.b3d",
+	textures = {"advtrains_wagon.png"},
+	drives_on={default=true},
+	max_speed=10,
+	seats = {
+		{
+			name="1",
+			attach_offset={x=-4, y=8, z=8},
+			view_offset={x=0, y=0, z=0},
+		},
+		{
+			name="2",
+			attach_offset={x=4, y=8, z=8},
+			view_offset={x=0, y=0, z=0},
+		},
+		{
+			name="3",
+			attach_offset={x=-4, y=8, z=-8},
+			view_offset={x=0, y=0, z=0},
+		},
+		{
+			name="4",
+			attach_offset={x=4, y=8, z=-8},
+			view_offset={x=0, y=0, z=0},
+		},
+	},
+	visual_size = {x=1, y=1},
+	wagon_span=3.1,
+	collisionbox = {-1.0,-0.5,-1.0, 1.0,2.5,1.0},
+	drops={"default:steelblock 4"},
+}, "Passenger Wagon", "advtrains_wagon_inv.png")
+advtrains.register_wagon("wagon_box", {
+	mesh="advtrains_wagon.b3d",
+	textures = {"advtrains_wagon_box.png"},
+	drives_on={default=true},
+	max_speed=10,
+	seats = {},
+	visual_size = {x=1, y=1},
+	wagon_span=1.8,
+	collisionbox = {-1.0,-0.5,-1.0, 1.0,2.5,1.0},
+	drops={"default:steelblock 4"},
+	has_inventory = true,
+	get_inventory_formspec = function(self)
+		return "size[8,11]"..
+			"list[detached:advtrains_wgn_"..self.unique_id..";box;0,0;8,6;]"..
+			"list[current_player;main;0,7;8,4;]"..
+			"listring[]"
+	end,
+	inventory_list_sizes = {
+		box=8*6,
+	},
+}, "Box Wagon", "advtrains_wagon_box_inv.png")
+
+minetest.register_craft({
+	output = 'advtrains:newlocomotive',
+	recipe = {
+		{'default:steelblock', 'default:steelblock', 'default:steelblock'},
+		{'default:steelblock', 'dye:black', 'default:steelblock'},
+		{'default:steelblock', 'default:steelblock', 'default:steelblock'},
+	},
+})
+minetest.register_craft({
+	output = 'advtrains:wagon_default',
+	recipe = {
+		{'default:steelblock', 'default:steelblock', 'default:steelblock'},
+		{'default:steelblock', 'dye:dark_green', 'default:steelblock'},
+		{'default:steelblock', 'default:steelblock', 'default:steelblock'},
+	},
+})
+minetest.register_craft({
+	output = 'advtrains:wagon_box',
+	recipe = {
+		{'default:steelblock', 'default:steelblock', 'default:steelblock'},
+		{'default:steelblock', 'default:chest', 'default:steelblock'},
+		{'default:steelblock', 'default:steelblock', 'default:steelblock'},
+	},
+})
diff --git a/advtrains/advtrains_train_steam/models/advtrains_detailed_steam_engine.b3d b/advtrains/advtrains_train_steam/models/advtrains_detailed_steam_engine.b3d
new file mode 100644
index 0000000..7418d8a
--- /dev/null
+++ b/advtrains/advtrains_train_steam/models/advtrains_detailed_steam_engine.b3d
diff --git a/advtrains/advtrains_train_steam/models/advtrains_engine_steam.b3d b/advtrains/advtrains_train_steam/models/advtrains_engine_steam.b3d
new file mode 100644
index 0000000..6a92f57
--- /dev/null
+++ b/advtrains/advtrains_train_steam/models/advtrains_engine_steam.b3d
diff --git a/advtrains/advtrains_train_steam/models/advtrains_passenger_wagon.b3d b/advtrains/advtrains_train_steam/models/advtrains_passenger_wagon.b3d
new file mode 100644
index 0000000..bb057f8
--- /dev/null
+++ b/advtrains/advtrains_train_steam/models/advtrains_passenger_wagon.b3d
diff --git a/models/advtrains_wagon.b3d b/advtrains/advtrains_train_steam/models/advtrains_wagon.b3d
index 5c8214c..5c8214c 100644
--- a/models/advtrains_wagon.b3d
+++ b/advtrains/advtrains_train_steam/models/advtrains_wagon.b3d
diff --git a/advtrains/advtrains_train_steam/textures/advtrains_detailed_steam_engine.png b/advtrains/advtrains_train_steam/textures/advtrains_detailed_steam_engine.png
new file mode 100644
index 0000000..eab4dc8
--- /dev/null
+++ b/advtrains/advtrains_train_steam/textures/advtrains_detailed_steam_engine.png
diff --git a/advtrains/advtrains_train_steam/textures/advtrains_engine_steam.png b/advtrains/advtrains_train_steam/textures/advtrains_engine_steam.png
new file mode 100644
index 0000000..4b27e77
--- /dev/null
+++ b/advtrains/advtrains_train_steam/textures/advtrains_engine_steam.png
diff --git a/textures/advtrains_newlocomotive_inv.png b/advtrains/advtrains_train_steam/textures/advtrains_engine_steam_inv.png
index 8d3fafb..8d3fafb 100755..100644
--- a/textures/advtrains_newlocomotive_inv.png
+++ b/advtrains/advtrains_train_steam/textures/advtrains_engine_steam_inv.png
diff --git a/advtrains/advtrains_train_steam/textures/advtrains_wagon.png b/advtrains/advtrains_train_steam/textures/advtrains_wagon.png
new file mode 100644
index 0000000..c850518
--- /dev/null
+++ b/advtrains/advtrains_train_steam/textures/advtrains_wagon.png
diff --git a/textures/advtrains_wagon_box.png b/advtrains/advtrains_train_steam/textures/advtrains_wagon_box.png
index 8bfbe06..8bfbe06 100644
--- a/textures/advtrains_wagon_box.png
+++ b/advtrains/advtrains_train_steam/textures/advtrains_wagon_box.png
diff --git a/textures/advtrains_wagon_box_inv.png b/advtrains/advtrains_train_steam/textures/advtrains_wagon_box_inv.png
index 480f245..480f245 100644
--- a/textures/advtrains_wagon_box_inv.png
+++ b/advtrains/advtrains_train_steam/textures/advtrains_wagon_box_inv.png
diff --git a/textures/advtrains_wagon_inv.png b/advtrains/advtrains_train_steam/textures/advtrains_wagon_inv.png
index 0b72ac3..0b72ac3 100755..100644
--- a/textures/advtrains_wagon_inv.png
+++ b/advtrains/advtrains_train_steam/textures/advtrains_wagon_inv.png
diff --git a/advtrains/advtrains_train_subway/depends.txt b/advtrains/advtrains_train_subway/depends.txt
new file mode 100644
index 0000000..6f00bf6
--- /dev/null
+++ b/advtrains/advtrains_train_subway/depends.txt
@@ -0,0 +1 @@
+advtrains
+\ No newline at end of file
diff --git a/advtrains/advtrains_train_subway/init.lua b/advtrains/advtrains_train_subway/init.lua
new file mode 100644
index 0000000..b105f1a
--- /dev/null
+++ b/advtrains/advtrains_train_subway/init.lua
@@ -0,0 +1,34 @@
+
+advtrains.register_wagon("subway_wagon", {
+	mesh="advtrains_subway_wagon.b3d",
+	textures = {"advtrains_subway_wagon.png"},
+	drives_on={default=true},
+	max_speed=15,
+	seats = {
+		{
+			name="Default Seat (driver stand)",
+			attach_offset={x=0, y=10, z=0},
+			view_offset={x=0, y=0, z=0},
+			driving_ctrl_access=true,
+		},
+	},
+	visual_size = {x=1, y=1},
+	wagon_span=2,
+	collisionbox = {-1.0,-0.5,-1.0, 1.0,2.5,1.0},
+	is_locomotive=true,
+	drops={"default:steelblock 4"},
+	--custom_on_activate = function(self, dtime_s)
+	--	atprint("subway custom_on_activate")
+	--	self.object:set_animation({x=1,y=80}, 15, 0, true)
+	--end,
+}, "Subway Passenger Wagon", "advtrains_subway_wagon_inv.png")
+
+--wagons
+minetest.register_craft({
+	output = 'advtrains:subway_wagon',
+	recipe = {
+		{'default:steelblock', 'default:steelblock', 'default:steelblock'},
+		{'default:steelblock', 'dye:yellow', 'default:steelblock'},
+		{'default:steelblock', 'default:steelblock', 'default:steelblock'},
+	},
+})
diff --git a/advtrains/advtrains_train_subway/models/advtrains_subway_wagon.b3d b/advtrains/advtrains_train_subway/models/advtrains_subway_wagon.b3d
new file mode 100644
index 0000000..8f35769
--- /dev/null
+++ b/advtrains/advtrains_train_subway/models/advtrains_subway_wagon.b3d
diff --git a/advtrains/advtrains_train_subway/textures/advtrains_subway_wagon.png b/advtrains/advtrains_train_subway/textures/advtrains_subway_wagon.png
new file mode 100644
index 0000000..079d797
--- /dev/null
+++ b/advtrains/advtrains_train_subway/textures/advtrains_subway_wagon.png
diff --git a/textures/advtrains_subway_train_inv.png b/advtrains/advtrains_train_subway/textures/advtrains_subway_wagon_inv.png
index 1d0e809..1d0e809 100644
--- a/textures/advtrains_subway_train_inv.png
+++ b/advtrains/advtrains_train_subway/textures/advtrains_subway_wagon_inv.png
diff --git a/advtrains/atc_command.txt b/advtrains/atc_command.txt
new file mode 100644
index 0000000..fa846e3
--- /dev/null
+++ b/advtrains/atc_command.txt
@@ -0,0 +1,68 @@
+ATC Command Syntax
+
+A train runs the current ATC command once it receives it, including delayed instructions. If the train receives a new command, the current command is discarded.
+Spaces can be inserted into commands as needed and are ignored.
+
+# simple commands:
+
+S<[0-9]+ speed or 'M'>
+Set target speed of train to <speed>. Accelerates if slower, rolls if faster. 'M' means maximum speed.
+Execution of command continues immediately.
+
+B<[0-9]+ speed>
+Brake until speed is reached. If faster, apply brakes, if slower, do nothing.
+Execution of command continues immediately.
+
+Examples:
+SM : accelerate to maximum speed
+S0 : roll to stand
+B0 : brake to stand
+S0B3 or B3S0: brake to 3, then roll to stand.
+
+W
+Wait until S and/or B commands reached the desired speed before continuing execution.
+
+D<[0-9]+ time>
+Delay: Wait for time seconds before continuing execution.
+
+R
+Reverse: change movement direction of train. ONLY WORKS WHEN TRAIN STANDS, else no-op.
+Use B0WR to definitely change direction.
+
+Examples:
+B0 W R D10 SM
+Subway train stopping in dead end station and returning in opposite direction
+
+# conditional statements:
+
+I<condition><code>;
+Execute code only if condition applies
+I<condition><code1>E<code2>;
+Execute code1 only if condition applies, else execute code2
+
+Conditions:
++ / -
+Tests the train's movement direction against the arrow on the ATC rail: M+ is true when train drives in direction of arrow.
+
+[</>/<=/>=][speed]
+Test if train's speed is greater or smaller than the given value
+
+Examples:
+I- B0 W R ; S8
+If the train drives in the 'wrong' direction, stop and reverse; independently accelerate to speed 8 afterwards.
+
+I<8 S8 ;
+If the train is slower than 8, accelerate to 8.
+
+# ATC controller operation modes
+static: Only give 1 static command.
+mesecon: Give 2 different commands depending on if the controller is mesecon-powered or not
+digiline: Don't give any commands by itself. When a train passes, a digiline message in the form of "[+/-][speed]" is sent on the set channel (where +/- means the same as with conditions). Any digiline message sent to the controller will be interpreted as ATC command and sent to the train.
+
+# Persistence
+ATC controllers that are configured as 'static' or 'mesecon' are persistent over mapblock unloads and will even command the train when the mapblock is unloaded. This is not possible with digilines since these do not work in unloaded mapchunks.
+
+# LUA ATC controller (in development)
+The LUA ATC Controller will operate by using LUA code. All operations shown above will have a function equivalent. Additionally all LUA ATC controllers share an environment and setting signal and switch status will be possible to allow for complicated railway systems/fully automated subways a.s.o.
+Also planned:
+- digicompute add-on to allow computer access to the ATC environment (railway maps... ... ... ... ...)
diff --git a/license.txt b/advtrains/license.txt
index 68a4b60..68a4b60 100644
--- a/license.txt
+++ b/advtrains/license.txt
diff --git a/license_media.txt b/advtrains/license_media.txt
index c0da560..c0da560 100644
--- a/license_media.txt
+++ b/advtrains/license_media.txt
diff --git a/manual.pdf b/advtrains/manual.pdf
index e8c6380..e8c6380 100644
--- a/manual.pdf
+++ b/advtrains/manual.pdf
diff --git a/models/blender/gleis/licence.txt~ b/advtrains/modpack.txt
index e69de29..e69de29 100644
--- a/models/blender/gleis/licence.txt~
+++ b/advtrains/modpack.txt
diff --git a/readme.txt b/advtrains/readme.txt
index ad093bd..40516e4 100644
--- a/readme.txt
+++ b/advtrains/readme.txt
@@ -17,7 +17,9 @@ Gravel Texture              : from Minetest Game
 Initial rail model/texture  : DS-minetest
 Models for signals/bumpers  : mbb
 Steam engine / wagon texture: mbb
+Detailed Steam engine       : mbb / Krokoschlange(animation)
 Industrial engine/wagons    : mbb
 Inventory images            : mbb
 Small code contributions    : NaruTrey / gpcf
-Mod Description             : hajo
-\ No newline at end of file
+Mod Description             : hajo
+If I forgot someone please punish me for that.
+\ No newline at end of file
diff --git a/screenshot.png b/advtrains/screenshot.png
index 78783e1..78783e1 100644
--- a/screenshot.png
+++ b/advtrains/screenshot.png
diff --git a/assets/AdvTrains_Additions.zip b/assets/AdvTrains_Additions.zip
new file mode 100644
index 0000000..7588acf
--- /dev/null
+++ b/assets/AdvTrains_Additions.zip
diff --git a/assets/Weichenhebel-CooleLokAnimiert.zip b/assets/Weichenhebel-CooleLokAnimiert.zip
new file mode 100644
index 0000000..1175880
--- /dev/null
+++ b/assets/Weichenhebel-CooleLokAnimiert.zip
diff --git a/assets/Weichenhebel-CooleLokAnimiert/dampflock4pipe_animated.blend b/assets/Weichenhebel-CooleLokAnimiert/dampflock4pipe_animated.blend
new file mode 100644
index 0000000..cf3b1da
--- /dev/null
+++ b/assets/Weichenhebel-CooleLokAnimiert/dampflock4pipe_animated.blend
diff --git a/assets/Weichenhebel-CooleLokAnimiert/dampflock4pipe_animated.blend1 b/assets/Weichenhebel-CooleLokAnimiert/dampflock4pipe_animated.blend1
new file mode 100644
index 0000000..cbc247b
--- /dev/null
+++ b/assets/Weichenhebel-CooleLokAnimiert/dampflock4pipe_animated.blend1
diff --git a/textures/advtrains_newlocomotive.xcf b/assets/advtrains_newlocomotive.xcf
index 9ad5187..9ad5187 100644
--- a/textures/advtrains_newlocomotive.xcf
+++ b/assets/advtrains_newlocomotive.xcf
diff --git a/assets/advtrains_wagon.png b/assets/advtrains_wagon.png
new file mode 100644
index 0000000..143154b
--- /dev/null
+++ b/assets/advtrains_wagon.png
diff --git a/models/blender/engine-with-animation.blend b/assets/blender/engine-with-animation.blend
index 2649587..2649587 100644
--- a/models/blender/engine-with-animation.blend
+++ b/assets/blender/engine-with-animation.blend
diff --git a/assets/blender/engine-with-animation_newtry.blend b/assets/blender/engine-with-animation_newtry.blend
new file mode 100644
index 0000000..101dc71
--- /dev/null
+++ b/assets/blender/engine-with-animation_newtry.blend
diff --git a/assets/blender/engine-with-animation_newtry.blend1 b/assets/blender/engine-with-animation_newtry.blend1
new file mode 100644
index 0000000..77d82d4
--- /dev/null
+++ b/assets/blender/engine-with-animation_newtry.blend1
diff --git a/assets/blender/gleis/detectorpart.png b/assets/blender/gleis/detectorpart.png
new file mode 100644
index 0000000..fc24181
--- /dev/null
+++ b/assets/blender/gleis/detectorpart.png
diff --git a/models/blender/gleis/infos/Grafik_weiche.png b/assets/blender/gleis/infos/Grafik_weiche.png
index 6674eb3..6674eb3 100644
--- a/models/blender/gleis/infos/Grafik_weiche.png
+++ b/assets/blender/gleis/infos/Grafik_weiche.png
diff --git a/models/blender/gleis/infos/breite b/assets/blender/gleis/infos/breite
index b2862c6..b2862c6 100644
--- a/models/blender/gleis/infos/breite
+++ b/assets/blender/gleis/infos/breite
diff --git a/assets/blender/gleis/licence.txt~ b/assets/blender/gleis/licence.txt~
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/assets/blender/gleis/licence.txt~
diff --git a/models/blender/gleis/rail_my.blend b/assets/blender/gleis/rail_my.blend
index 3c741bc..3c741bc 100644
--- a/models/blender/gleis/rail_my.blend
+++ b/assets/blender/gleis/rail_my.blend
diff --git a/models/blender/gleis/rail_my.blend1 b/assets/blender/gleis/rail_my.blend1
index 6322856..6322856 100644
--- a/models/blender/gleis/rail_my.blend1
+++ b/assets/blender/gleis/rail_my.blend1
diff --git a/models/blender/gleis/rail_my_rt.blend b/assets/blender/gleis/rail_my_rt.blend
index 8372a0c..8372a0c 100644
--- a/models/blender/gleis/rail_my_rt.blend
+++ b/assets/blender/gleis/rail_my_rt.blend
diff --git a/models/blender/gleis/rail_my_rt.blend1 b/assets/blender/gleis/rail_my_rt.blend1
index 7d0978e..7d0978e 100644
--- a/models/blender/gleis/rail_my_rt.blend1
+++ b/assets/blender/gleis/rail_my_rt.blend1
diff --git a/models/blender/gleis/rail_my_rt_final.blend1 b/assets/blender/gleis/rail_my_rt_final.blend
index 1f346ae..d07a65d 100644
--- a/models/blender/gleis/rail_my_rt_final.blend1
+++ b/assets/blender/gleis/rail_my_rt_final.blend
diff --git a/models/blender/gleis/rail_my_rt_final.blend b/assets/blender/gleis/rail_my_rt_final.blend1
index 6a9a088..8a2d213 100644
--- a/models/blender/gleis/rail_my_rt_final.blend
+++ b/assets/blender/gleis/rail_my_rt_final.blend1
diff --git a/models/blender/gleis/rail_my_rt_switches.blend b/assets/blender/gleis/rail_my_rt_switches.blend
index fdce427..fdce427 100644
--- a/models/blender/gleis/rail_my_rt_switches.blend
+++ b/assets/blender/gleis/rail_my_rt_switches.blend
diff --git a/models/blender/gleis/rail_my_rt_switches.blend1 b/assets/blender/gleis/rail_my_rt_switches.blend1
index 04370ba..04370ba 100644
--- a/models/blender/gleis/rail_my_rt_switches.blend1
+++ b/assets/blender/gleis/rail_my_rt_switches.blend1
diff --git a/models/blender/gleis/rail_my_rt_switches2.blend b/assets/blender/gleis/rail_my_rt_switches2.blend
index 9562e4d..9562e4d 100644
--- a/models/blender/gleis/rail_my_rt_switches2.blend
+++ b/assets/blender/gleis/rail_my_rt_switches2.blend
diff --git a/models/blender/gleis/rail_my_rt_switches2.blend1 b/assets/blender/gleis/rail_my_rt_switches2.blend1
index 07a155f..07a155f 100644
--- a/models/blender/gleis/rail_my_rt_switches2.blend1
+++ b/assets/blender/gleis/rail_my_rt_switches2.blend1
diff --git a/models/blender/gleis/rail_together.blend b/assets/blender/gleis/rail_together.blend
index cff51ea..cff51ea 100644
--- a/models/blender/gleis/rail_together.blend
+++ b/assets/blender/gleis/rail_together.blend
diff --git a/models/blender/gleis/rail_together.png b/assets/blender/gleis/rail_together.png
index 386cd5c..386cd5c 100644
--- a/models/blender/gleis/rail_together.png
+++ b/assets/blender/gleis/rail_together.png
diff --git a/models/blender/gleis/rail_together2.png b/assets/blender/gleis/rail_together2.png
index 3effe34..3effe34 100644
--- a/models/blender/gleis/rail_together2.png
+++ b/assets/blender/gleis/rail_together2.png
diff --git a/models/blender/gleis/rail_together3.png b/assets/blender/gleis/rail_together3.png
index 4a183c1..4a183c1 100644
--- a/models/blender/gleis/rail_together3.png
+++ b/assets/blender/gleis/rail_together3.png
diff --git a/models/blender/gleis/rail_verticals.blend b/assets/blender/gleis/rail_verticals.blend
index 45c37e1..45c37e1 100644
--- a/models/blender/gleis/rail_verticals.blend
+++ b/assets/blender/gleis/rail_verticals.blend
diff --git a/models/blender/gleis/rail_verticals.blend1 b/assets/blender/gleis/rail_verticals.blend1
index 320f30b..320f30b 100644
--- a/models/blender/gleis/rail_verticals.blend1
+++ b/assets/blender/gleis/rail_verticals.blend1
diff --git a/models/blender/gleis/rail_verticals3.blend b/assets/blender/gleis/rail_verticals3.blend
index 5d62959..5d62959 100644
--- a/models/blender/gleis/rail_verticals3.blend
+++ b/assets/blender/gleis/rail_verticals3.blend
diff --git a/models/blender/gleis/rail_verticals3.blend1 b/assets/blender/gleis/rail_verticals3.blend1
index 893f2ea..893f2ea 100644
--- a/models/blender/gleis/rail_verticals3.blend1
+++ b/assets/blender/gleis/rail_verticals3.blend1
diff --git a/models/blender/gleis/rail_verticals45.blend b/assets/blender/gleis/rail_verticals45.blend
index a1589e3..a1589e3 100644
--- a/models/blender/gleis/rail_verticals45.blend
+++ b/assets/blender/gleis/rail_verticals45.blend
diff --git a/models/blender/gleis/rail_verticals45.blend1 b/assets/blender/gleis/rail_verticals45.blend1
index 6b44d1c..6b44d1c 100644
--- a/models/blender/gleis/rail_verticals45.blend1
+++ b/assets/blender/gleis/rail_verticals45.blend1
diff --git a/models/blender/gleis/rail_verticals45.blend11 b/assets/blender/gleis/rail_verticals45.blend11
index 48316e8..48316e8 100644
--- a/models/blender/gleis/rail_verticals45.blend11
+++ b/assets/blender/gleis/rail_verticals45.blend11
diff --git a/models/blender/gleis/texturen/rail.png b/assets/blender/gleis/texturen/rail.png
index 8478cf6..8478cf6 100644
--- a/models/blender/gleis/texturen/rail.png
+++ b/assets/blender/gleis/texturen/rail.png
diff --git a/models/blender/gleis/texturen/uv.png b/assets/blender/gleis/texturen/uv.png
index fb0af3e..fb0af3e 100644
--- a/models/blender/gleis/texturen/uv.png
+++ b/assets/blender/gleis/texturen/uv.png
diff --git a/models/blender/industrial/industry_loc.blend b/assets/blender/industrial/industry_loc.blend
index 1a6cb2b..1a6cb2b 100644
--- a/models/blender/industrial/industry_loc.blend
+++ b/assets/blender/industrial/industry_loc.blend
diff --git a/models/blender/industrial/industry_loc.blend1 b/assets/blender/industrial/industry_loc.blend1
index af54c3f..af54c3f 100644
--- a/models/blender/industrial/industry_loc.blend1
+++ b/assets/blender/industrial/industry_loc.blend1
diff --git a/models/blender/industrial/industry_loc.blend11 b/assets/blender/industrial/industry_loc.blend11
index a089a65..a089a65 100644
--- a/models/blender/industrial/industry_loc.blend11
+++ b/assets/blender/industrial/industry_loc.blend11
diff --git a/models/blender/industrial/industry_oil_ wagong.blend b/assets/blender/industrial/industry_oil_ wagong.blend
index 30bde51..30bde51 100644
--- a/models/blender/industrial/industry_oil_ wagong.blend
+++ b/assets/blender/industrial/industry_oil_ wagong.blend
diff --git a/models/blender/industrial/industry_oil_ wagong.blend1 b/assets/blender/industrial/industry_oil_ wagong.blend1
index 849971d..849971d 100644
--- a/models/blender/industrial/industry_oil_ wagong.blend1
+++ b/assets/blender/industrial/industry_oil_ wagong.blend1
diff --git a/models/blender/industrial/industry_tree_wagong.blend b/assets/blender/industrial/industry_tree_wagong.blend
index 23de208..23de208 100644
--- a/models/blender/industrial/industry_tree_wagong.blend
+++ b/assets/blender/industrial/industry_tree_wagong.blend
diff --git a/models/blender/industrial/industry_tree_wagong.blend1 b/assets/blender/industrial/industry_tree_wagong.blend1
index bf2c9ed..bf2c9ed 100644
--- a/models/blender/industrial/industry_tree_wagong.blend1
+++ b/assets/blender/industrial/industry_tree_wagong.blend1
diff --git a/models/blender/industrial/industry_tree_wagong.png b/assets/blender/industrial/industry_tree_wagong.png
index 87109dd..87109dd 100644
--- a/models/blender/industrial/industry_tree_wagong.png
+++ b/assets/blender/industrial/industry_tree_wagong.png
diff --git a/models/blender/locomotive.blend b/assets/blender/locomotive.blend
index 8fd6059..8fd6059 100644
--- a/models/blender/locomotive.blend
+++ b/assets/blender/locomotive.blend
diff --git a/models/blender/magnet_track.blend b/assets/blender/magnet_track.blend
index 0ab14e7..0ab14e7 100644
--- a/models/blender/magnet_track.blend
+++ b/assets/blender/magnet_track.blend
diff --git a/models/blender/mbb/advtrains_wagon_japan.xcf b/assets/blender/mbb/advtrains_wagon_japan.xcf
index 4fc88c0..4fc88c0 100644
--- a/models/blender/mbb/advtrains_wagon_japan.xcf
+++ b/assets/blender/mbb/advtrains_wagon_japan.xcf
diff --git a/models/blender/mbb/modern_japanlocomotive.blend b/assets/blender/mbb/modern_japanlocomotive.blend
index 6eb8f3d..6eb8f3d 100644
--- a/models/blender/mbb/modern_japanlocomotive.blend
+++ b/assets/blender/mbb/modern_japanlocomotive.blend
diff --git a/models/blender/mbb/modern_japanlocomotive.blend1 b/assets/blender/mbb/modern_japanlocomotive.blend1
index a2e745d..a2e745d 100644
--- a/models/blender/mbb/modern_japanlocomotive.blend1
+++ b/assets/blender/mbb/modern_japanlocomotive.blend1
diff --git a/models/blender/mbb/modern_japanlocomotive.png b/assets/blender/mbb/modern_japanlocomotive.png
index b80d16f..b80d16f 100644
--- a/models/blender/mbb/modern_japanlocomotive.png
+++ b/assets/blender/mbb/modern_japanlocomotive.png
diff --git a/models/blender/mbb/modern_japanlocomotive.xcf b/assets/blender/mbb/modern_japanlocomotive.xcf
index bb28534..bb28534 100644
--- a/models/blender/mbb/modern_japanlocomotive.xcf
+++ b/assets/blender/mbb/modern_japanlocomotive.xcf
diff --git a/models/blender/mbb/modern_locomotive.blend b/assets/blender/mbb/modern_locomotive.blend
index 8e72233..8e72233 100644
--- a/models/blender/mbb/modern_locomotive.blend
+++ b/assets/blender/mbb/modern_locomotive.blend
diff --git a/models/blender/mbb/modern_wagong.blend b/assets/blender/mbb/modern_wagong.blend
index f32710a..f32710a 100644
--- a/models/blender/mbb/modern_wagong.blend
+++ b/assets/blender/mbb/modern_wagong.blend
diff --git a/models/blender/mbb/modern_wagong.blend1 b/assets/blender/mbb/modern_wagong.blend1
index 376831c..376831c 100644
--- a/models/blender/mbb/modern_wagong.blend1
+++ b/assets/blender/mbb/modern_wagong.blend1
diff --git a/models/blender/mbb/modern_wagong_uv.blend b/assets/blender/mbb/modern_wagong_uv.blend
index 4c10fb3..4c10fb3 100644
--- a/models/blender/mbb/modern_wagong_uv.blend
+++ b/assets/blender/mbb/modern_wagong_uv.blend
diff --git a/models/blender/mbb/modern_wagong_uv.blend1 b/assets/blender/mbb/modern_wagong_uv.blend1
index ce77416..ce77416 100644
--- a/models/blender/mbb/modern_wagong_uv.blend1
+++ b/assets/blender/mbb/modern_wagong_uv.blend1
diff --git a/models/blender/mbb/modern_wagong_uv.png b/assets/blender/mbb/modern_wagong_uv.png
index 68018ea..68018ea 100644
--- a/models/blender/mbb/modern_wagong_uv.png
+++ b/assets/blender/mbb/modern_wagong_uv.png
diff --git a/models/blender/mbb/prellbock.blend b/assets/blender/mbb/prellbock.blend
index 1c20ab2..1c20ab2 100644
--- a/models/blender/mbb/prellbock.blend
+++ b/assets/blender/mbb/prellbock.blend
diff --git a/models/blender/mbb/prellbock.blend1 b/assets/blender/mbb/prellbock.blend1
index 981538e..981538e 100644
--- a/models/blender/mbb/prellbock.blend1
+++ b/assets/blender/mbb/prellbock.blend1
diff --git a/models/blender/mbb/prellbock.uv.png b/assets/blender/mbb/prellbock.uv.png
index 7730753..7730753 100644
--- a/models/blender/mbb/prellbock.uv.png
+++ b/assets/blender/mbb/prellbock.uv.png
diff --git a/models/blender/mbb/regio-lokomotive.blend b/assets/blender/mbb/regio-lokomotive.blend
index 210e60e..210e60e 100644
--- a/models/blender/mbb/regio-lokomotive.blend
+++ b/assets/blender/mbb/regio-lokomotive.blend
diff --git a/models/blender/mbb/regio-waron.blend b/assets/blender/mbb/regio-waron.blend
index 19b07ce..19b07ce 100644
--- a/models/blender/mbb/regio-waron.blend
+++ b/assets/blender/mbb/regio-waron.blend
diff --git a/models/blender/mbb/retrosignal.blend b/assets/blender/mbb/retrosignal.blend
index b795215..b795215 100644
--- a/models/blender/mbb/retrosignal.blend
+++ b/assets/blender/mbb/retrosignal.blend
diff --git a/models/blender/mbb/retrosignal.blend1 b/assets/blender/mbb/retrosignal.blend1
index 94af470..94af470 100644
--- a/models/blender/mbb/retrosignal.blend1
+++ b/assets/blender/mbb/retrosignal.blend1
diff --git a/models/blender/mbb/signal(2)_hoch.blend b/assets/blender/mbb/signal(2)_hoch.blend
index 70391f6..70391f6 100644
--- a/models/blender/mbb/signal(2)_hoch.blend
+++ b/assets/blender/mbb/signal(2)_hoch.blend
diff --git a/models/blender/mbb/signal(2)_unten.blend b/assets/blender/mbb/signal(2)_unten.blend
index 4e917bc..4e917bc 100644
--- a/models/blender/mbb/signal(2)_unten.blend
+++ b/assets/blender/mbb/signal(2)_unten.blend
diff --git a/models/blender/mbb/signal.blend b/assets/blender/mbb/signal.blend
index 135c7b4..135c7b4 100644
--- a/models/blender/mbb/signal.blend
+++ b/assets/blender/mbb/signal.blend
diff --git a/models/blender/mbb/signal.blend1 b/assets/blender/mbb/signal.blend1
index 63a8c99..63a8c99 100644
--- a/models/blender/mbb/signal.blend1
+++ b/assets/blender/mbb/signal.blend1
diff --git a/models/blender/mbb/signal.png b/assets/blender/mbb/signal.png
index 779cdda..779cdda 100644
--- a/models/blender/mbb/signal.png
+++ b/assets/blender/mbb/signal.png
diff --git a/models/blender/mbb/signal.xcf b/assets/blender/mbb/signal.xcf
index f667739..f667739 100644
--- a/models/blender/mbb/signal.xcf
+++ b/assets/blender/mbb/signal.xcf
diff --git a/models/blender/mbb/signal2.png b/assets/blender/mbb/signal2.png
index 7af4e2d..7af4e2d 100644
--- a/models/blender/mbb/signal2.png
+++ b/assets/blender/mbb/signal2.png
diff --git a/models/blender/mbb/tr-logo.png b/assets/blender/mbb/tr-logo.png
index 9bc0f10..9bc0f10 100644
--- a/models/blender/mbb/tr-logo.png
+++ b/assets/blender/mbb/tr-logo.png
diff --git a/models/blender/mbb/weichenhebel1.blend b/assets/blender/mbb/weichenhebel1.blend
index 70b997d..70b997d 100644
--- a/models/blender/mbb/weichenhebel1.blend
+++ b/assets/blender/mbb/weichenhebel1.blend
diff --git a/models/blender/mbb/weichenhebel2.blend b/assets/blender/mbb/weichenhebel2.blend
index c1c3aac..c1c3aac 100644
--- a/models/blender/mbb/weichenhebel2.blend
+++ b/assets/blender/mbb/weichenhebel2.blend
diff --git a/models/blender/newlocomotive.blend b/assets/blender/newlocomotive.blend
index 858882b..858882b 100644
--- a/models/blender/newlocomotive.blend
+++ b/assets/blender/newlocomotive.blend
diff --git a/models/blender/newlocomotive.blend1 b/assets/blender/newlocomotive.blend1
index 4b8b24f..4b8b24f 100644
--- a/models/blender/newlocomotive.blend1
+++ b/assets/blender/newlocomotive.blend1
diff --git a/models/blender/newlocomotive_uvs.png b/assets/blender/newlocomotive_uvs.png
index 879be65..879be65 100644
--- a/models/blender/newlocomotive_uvs.png
+++ b/assets/blender/newlocomotive_uvs.png
diff --git a/models/blender/newwagon.blend b/assets/blender/newwagon.blend
index 1cedc55..1cedc55 100644
--- a/models/blender/newwagon.blend
+++ b/assets/blender/newwagon.blend
diff --git a/models/blender/newwagon.blend1 b/assets/blender/newwagon.blend1
index eb30fde..eb30fde 100644
--- a/models/blender/newwagon.blend1
+++ b/assets/blender/newwagon.blend1
diff --git a/models/blender/newwagon.png b/assets/blender/newwagon.png
index 812bc32..812bc32 100644
--- a/models/blender/newwagon.png
+++ b/assets/blender/newwagon.png
diff --git a/models/blender/subway-train.blend1 b/assets/blender/subway-train.blend
index 86d1f92..01bb233 100644
--- a/models/blender/subway-train.blend1
+++ b/assets/blender/subway-train.blend
diff --git a/models/blender/subway-train.blend b/assets/blender/subway-train.blend1
index 690d87b..690d87b 100644
--- a/models/blender/subway-train.blend
+++ b/assets/blender/subway-train.blend1
diff --git a/models/blender/subway-train.png b/assets/blender/subway-train.png
index d0b9731..d0b9731 100644
--- a/models/blender/subway-train.png
+++ b/assets/blender/subway-train.png
diff --git a/models/blender/subway-train.xcf b/assets/blender/subway-train.xcf
index 775b87c..775b87c 100644
--- a/models/blender/subway-train.xcf
+++ b/assets/blender/subway-train.xcf
diff --git a/assets/blender/subway-train_animate.blend b/assets/blender/subway-train_animate.blend
new file mode 100644
index 0000000..75cdc52
--- /dev/null
+++ b/assets/blender/subway-train_animate.blend
diff --git a/assets/blender/subway-train_animate.blend1 b/assets/blender/subway-train_animate.blend1
new file mode 100644
index 0000000..04171fc
--- /dev/null
+++ b/assets/blender/subway-train_animate.blend1
diff --git a/assets/blender/subway-train_animate_mirrored.blend b/assets/blender/subway-train_animate_mirrored.blend
new file mode 100644
index 0000000..aa11c34
--- /dev/null
+++ b/assets/blender/subway-train_animate_mirrored.blend
diff --git a/assets/blender/subway-train_animate_mirrored.blend1 b/assets/blender/subway-train_animate_mirrored.blend1
new file mode 100644
index 0000000..4d64915
--- /dev/null
+++ b/assets/blender/subway-train_animate_mirrored.blend1
diff --git a/assets/blender/subway-train_animate_mirrored_solidify.blend b/assets/blender/subway-train_animate_mirrored_solidify.blend
new file mode 100644
index 0000000..7a25b6f
--- /dev/null
+++ b/assets/blender/subway-train_animate_mirrored_solidify.blend
diff --git a/assets/blender/subway-train_animate_mirrored_solidify.blend1 b/assets/blender/subway-train_animate_mirrored_solidify.blend1
new file mode 100644
index 0000000..f81e303
--- /dev/null
+++ b/assets/blender/subway-train_animate_mirrored_solidify.blend1
diff --git a/assets/blender/subway-train_animate_mirrored_solidify_uv.blend b/assets/blender/subway-train_animate_mirrored_solidify_uv.blend
new file mode 100644
index 0000000..b05b0a5
--- /dev/null
+++ b/assets/blender/subway-train_animate_mirrored_solidify_uv.blend
diff --git a/assets/blender/subway-train_animate_mirrored_solidify_uv.blend1 b/assets/blender/subway-train_animate_mirrored_solidify_uv.blend1
new file mode 100644
index 0000000..145137b
--- /dev/null
+++ b/assets/blender/subway-train_animate_mirrored_solidify_uv.blend1
diff --git a/assets/blender/subway-train_animate_mirrored_solidify_uv.png b/assets/blender/subway-train_animate_mirrored_solidify_uv.png
new file mode 100644
index 0000000..e63a7f2
--- /dev/null
+++ b/assets/blender/subway-train_animate_mirrored_solidify_uv.png
diff --git a/assets/blender/subway-train_animate_mirrored_solidify_uv.xcf b/assets/blender/subway-train_animate_mirrored_solidify_uv.xcf
new file mode 100644
index 0000000..42adace
--- /dev/null
+++ b/assets/blender/subway-train_animate_mirrored_solidify_uv.xcf
diff --git a/models/blender/trackplane.blend b/assets/blender/trackplane.blend
index 79365f7..79365f7 100644
--- a/models/blender/trackplane.blend
+++ b/assets/blender/trackplane.blend
diff --git a/models/blender/trackvertical1.blend b/assets/blender/trackvertical1.blend
index fca6742..fca6742 100644
--- a/models/blender/trackvertical1.blend
+++ b/assets/blender/trackvertical1.blend
diff --git a/models/blender/trackvertical1.blend1 b/assets/blender/trackvertical1.blend1
index b146b56..b146b56 100644
--- a/models/blender/trackvertical1.blend1
+++ b/assets/blender/trackvertical1.blend1
diff --git a/models/blender/trackvertical1.png b/assets/blender/trackvertical1.png
index a998dcb..a998dcb 100644
--- a/models/blender/trackvertical1.png
+++ b/assets/blender/trackvertical1.png
diff --git a/models/blender/trackvertical2.blend b/assets/blender/trackvertical2.blend
index a066b84..a066b84 100644
--- a/models/blender/trackvertical2.blend
+++ b/assets/blender/trackvertical2.blend
diff --git a/models/blender/trackvertical2.png b/assets/blender/trackvertical2.png
index 43142f9..43142f9 100644
--- a/models/blender/trackvertical2.png
+++ b/assets/blender/trackvertical2.png
diff --git a/assets/dampflock4.blend b/assets/dampflock4.blend
new file mode 100644
index 0000000..883c3d3
--- /dev/null
+++ b/assets/dampflock4.blend
diff --git a/assets/init.lua b/assets/init.lua
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/assets/init.lua
diff --git a/textures/larger rails.xcf b/assets/larger rails.xcf
index 42ae592..42ae592 100644
--- a/textures/larger rails.xcf
+++ b/assets/larger rails.xcf
diff --git a/assets/magleves_lockomotive.blend b/assets/magleves_lockomotive.blend
new file mode 100644
index 0000000..8c82b00
--- /dev/null
+++ b/assets/magleves_lockomotive.blend
diff --git a/assets/magleves_track.blend b/assets/magleves_track.blend
new file mode 100644
index 0000000..82f11ef
--- /dev/null
+++ b/assets/magleves_track.blend
diff --git a/assets/magleves_wagon.blend b/assets/magleves_wagon.blend
new file mode 100644
index 0000000..cc89531
--- /dev/null
+++ b/assets/magleves_wagon.blend
diff --git a/assets/mbbrailtextures/advtrains_dtrack_rail.png b/assets/mbbrailtextures/advtrains_dtrack_rail.png
new file mode 100644
index 0000000..bd0c217
--- /dev/null
+++ b/assets/mbbrailtextures/advtrains_dtrack_rail.png
diff --git a/assets/mbbrailtextures/advtrains_dtrack_rail_atc.png b/assets/mbbrailtextures/advtrains_dtrack_rail_atc.png
new file mode 100644
index 0000000..7e4c20f
--- /dev/null
+++ b/assets/mbbrailtextures/advtrains_dtrack_rail_atc.png
diff --git a/assets/mbbrailtextures/advtrains_dtrack_rail_detector_on.png b/assets/mbbrailtextures/advtrains_dtrack_rail_detector_on.png
new file mode 100644
index 0000000..c878324
--- /dev/null
+++ b/assets/mbbrailtextures/advtrains_dtrack_rail_detector_on.png
diff --git a/models/oldmodels/locomotive.b3d b/assets/oldmodels/locomotive.b3d
index 5e16be3..5e16be3 100644
--- a/models/oldmodels/locomotive.b3d
+++ b/assets/oldmodels/locomotive.b3d
diff --git a/models/oldmodels/trackvertical1.b3d b/assets/oldmodels/trackvertical1.b3d
index 5620f60..5620f60 100644
--- a/models/oldmodels/trackvertical1.b3d
+++ b/assets/oldmodels/trackvertical1.b3d
diff --git a/models/oldmodels/trackvertical2.b3d b/assets/oldmodels/trackvertical2.b3d
index 22dbb20..22dbb20 100644
--- a/models/oldmodels/trackvertical2.b3d
+++ b/assets/oldmodels/trackvertical2.b3d
diff --git a/assets/uban_fancy.blend b/assets/uban_fancy.blend
new file mode 100644
index 0000000..f049966
--- /dev/null
+++ b/assets/uban_fancy.blend
diff --git a/assets/wagonfancytexture.png b/assets/wagonfancytexture.png
new file mode 100644
index 0000000..c850518
--- /dev/null
+++ b/assets/wagonfancytexture.png
diff --git a/assets/wagong_fancy.blend b/assets/wagong_fancy.blend
new file mode 100644
index 0000000..f9e44d5
--- /dev/null
+++ b/assets/wagong_fancy.blend
diff --git a/assets/wagong_fancy.blend1 b/assets/wagong_fancy.blend1
new file mode 100644
index 0000000..5c6c328
--- /dev/null
+++ b/assets/wagong_fancy.blend1
diff --git a/atc.lua b/atc.lua
deleted file mode 100644
index 0afddb0..0000000
--- a/atc.lua
+++ /dev/null
@@ -1,4 +0,0 @@
---atc.lua
---registers and controls the ATC system
-
---(simple)mesecon detector rails
diff --git a/init.lua b/init.lua
deleted file mode 100644
index 41b624e..0000000
--- a/init.lua
+++ /dev/null
@@ -1,42 +0,0 @@
---advtrains
-
-advtrains={}
-
-advtrains.modpath = minetest.get_modpath("advtrains")
-
---print=function(text)
---	minetest.log("action", tostring(text) or "<non-string>")
---end
-print = function(t) minetest.log("action", t) minetest.chat_send_all(t) end
-
-dofile(advtrains.modpath.."/helpers.lua");
-dofile(advtrains.modpath.."/debugitems.lua");
-
-advtrains.meseconrules = 
-{{x=0,  y=0,  z=-1},
- {x=1,  y=0,  z=0},
- {x=-1, y=0,  z=0},
- {x=0,  y=0,  z=1},
- {x=1,  y=1,  z=0},
- {x=1,  y=-1, z=0},
- {x=-1, y=1,  z=0},
- {x=-1, y=-1, z=0},
- {x=0,  y=1,  z=1},
- {x=0,  y=-1, z=1},
- {x=0,  y=1,  z=-1},
- {x=0,  y=-1, z=-1},
- {x=0, y=-2, z=0}}
-dofile(advtrains.modpath.."/trainlogic.lua")
-dofile(advtrains.modpath.."/trainhud.lua")
-dofile(advtrains.modpath.."/trackplacer.lua")
-dofile(advtrains.modpath.."/tracks.lua")
-dofile(advtrains.modpath.."/atc.lua")
-dofile(advtrains.modpath.."/wagons.lua")
-
-dofile(advtrains.modpath.."/pseudoload.lua")
-dofile(advtrains.modpath.."/couple.lua")
-dofile(advtrains.modpath.."/damage.lua")
-
-dofile(advtrains.modpath.."/signals.lua")
-dofile(advtrains.modpath.."/misc_nodes.lua")
-dofile(advtrains.modpath.."/crafting.lua")
diff --git a/models/advtrains_engine_steam.b3d b/models/advtrains_engine_steam.b3d
deleted file mode 100644
index 36bdd15..0000000
--- a/models/advtrains_engine_steam.b3d
+++ /dev/null
diff --git a/models/advtrains_subway_train.b3d b/models/advtrains_subway_train.b3d
deleted file mode 100644
index a824d33..0000000
--- a/models/advtrains_subway_train.b3d
+++ /dev/null
diff --git a/modpack.txt b/modpack.txt
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/modpack.txt
diff --git a/pseudoload.lua b/pseudoload.lua
deleted file mode 100644
index 8511811..0000000
--- a/pseudoload.lua
+++ /dev/null
@@ -1,180 +0,0 @@
-local print=function(t) minetest.log("action", t) minetest.chat_send_all(t) end
-
---pseudoload.lua
---responsible for keeping up a database of all rail nodes existant in the world, regardless of whether the mapchunk is loaded.
-
-advtrains.trackdb={}
---trackdb[tt][y][x][z]={conn1, conn2, rely1, rely2, railheight}
---serialization format:
---(2byte x)(2byte y)(2byte z)(4bits conn1, 4bits conn2)[(plain rely1)|(plain rely2)|(plain railheight)]\n
---[] may be missing if 0,0,0
-
---load initially
-
---[[ TODO temporary outcomment
-
---delayed since all traintypes need to be registered
-minetest.after(0, function()
-
-for tt, _ in pairs(advtrains.all_traintypes) do
-	local pl_fpath=minetest.get_worldpath().."/advtrains_trackdb_"..tt
-	advtrains.trackdb[tt]={}
-	local file, err = io.open(pl_fpath, "r")
-	if not file then
-		local er=err or "Unknown Error"
-		print("[advtrains]Failed loading advtrains trackdb save file "..er)
-	else
-		--custom format to save memory
-		while true do
-			local xbytes=file:read(2)
-			if not xbytes or #xbytes<2 then
-				break --eof reached
-			end
-			print(xbytes)
-			local ybytes=file:read(2)
-			local zbytes=file:read(2)
-			local x=(string.byte(xbytes[1])-128)*256+(string.byte(xbytes[2]))
-			local y=(string.byte(ybytes[1])-128)*256+(string.byte(ybytes[2]))
-			local z=(string.byte(zbytes[1])-128)*256+(string.byte(zbytes[2]))
-			
-			local conn1=string.byte(file:read(1))
-			local conn1=string.byte(file:read(1))
-			
-			if not advtrains.trackdb[tt][y] then advtrains.trackdb[tt][y]={} end
-			if not advtrains.trackdb[tt][y][x] then advtrains.trackdb[tt][y][x]={} end
-			
-			local rest=file.read("*l")
-			if rest~="" then
-				local rely1, rely2, railheight=string.match(rest, "([^|]+)|([^|]+)|([^|]+)")
-				if rely1 and rely2 and railheight then
-					advtrains.trackdb[tt][y][x][z]={
-						conn1=conn1, conn2=conn2,
-						rely1=rely1, rely2=rely2,
-						railheight=railheight
-					}
-				else
-					advtrains.trackdb[tt][y][x][z]={
-						conn1=conn1, conn2=conn2
-					}
-				end
-			else
-				advtrains.trackdb[tt][y][x][z]={
-					conn1=conn1, conn2=conn2
-				}
-			end
-		end
-		file:close()
-	end
-end
-
---end minetest.after
-end)
-
-function advtrains.save_trackdb()
-	for tt, _ in pairs(advtrains.all_traintypes) do
-		local pl_fpath=minetest.get_worldpath().."/advtrains_trackdb_"..tt
-		local file, err = io.open(pl_fpath, "w")
-		if not file then
-			local er=err or "Unknown Error"
-			print("[advtrains]Failed saving advtrains trackdb save file "..er)
-		else
-			--custom format to save memory
-			for y,tyl in pairs(advtrains.trackdb[tt]) do
-				for x,txl in pairs(tyl) do
-					for z,rail in pairs(txl) do
-						print("write "..x.." "..y.." "..z.." "..minetest.serialize(rail))
-						file:write(string.char(math.floor(x/256)+128)..string.char((x%256)))
-						file:write(string.char(math.floor(y/256)+128)..string.char((y%256)))
-						file:write(string.char(math.floor(z/256)+128)..string.char((z%256)))
-						file:write(string.char(rail.conn1))
-						file:write(string.char(rail.conn2))
-						if (rail.rely1 and rail.rely1~=0) or (rail.rely2 and rail.rely2~=0) or (rail.railheight and rail.railheight~=0) then
-							file:write(rail.rely1.."|"..rail.rely2.."|"..rail.railheight)
-						end
-						file:write("\n")
-					end
-				end
-			end
-			file:close()
-		end
-	end
-end
-]]--end temp outcomment
-advtrains.trackdb={}
-advtrains.fpath_tdb=minetest.get_worldpath().."/advtrains_trackdb"
-local file, err = io.open(advtrains.fpath_tdb, "r")
-if not file then
-	local er=err or "Unknown Error"
-	print("[advtrains]Failed loading advtrains save file "..er)
-else
-	local tbl = minetest.deserialize(file:read("*a"))
-	if type(tbl) == "table" then
-		advtrains.trackdb=tbl
-	end
-	file:close()
-end
-function advtrains.save_trackdb()
-	local datastr = minetest.serialize(advtrains.trackdb)
-	if not datastr then
-		minetest.log("error", "[advtrains] Failed to serialize trackdb data!")
-		return
-	end
-	local file, err = io.open(advtrains.fpath_tdb, "w")
-	if err then
-		return err
-	end
-	file:write(datastr)
-	file:close()
-end
-
---get_node with pseudoload.
---returns:
---true, conn1, conn2, rely1, rely2, railheight   in case everything's right.
---false  if it's not a rail or the train does not drive on this rail, but it is loaded or
---nil    if the node is neither loaded nor in trackdb
---the distraction between false and nil will be needed only in special cases.(train initpos)
-function advtrains.get_rail_info_at(pos, traintype)
-	local node=minetest.get_node_or_nil(pos)
-	if not node then
-		--try raildb
-		local rdp=vector.round(pos)
-		local dbe=(advtrains.trackdb[traintype] and advtrains.trackdb[traintype][rdp.y] and advtrains.trackdb[traintype][rdp.y][rdp.x] and advtrains.trackdb[traintype][rdp.y][rdp.x][rdp.z])
-		if dbe then
-			return true, dbe.conn1, dbe.conn2, dbe.rely1 or 0, dbe.rely2 or 0, dbe.railheight or 0
-		else
-			return nil
-		end
-	end
-	local nodename=node.name
-	if(not advtrains.is_track_and_drives_on(nodename, advtrains.all_traintypes[traintype].drives_on)) then
-		return false
-	end
-	local conn1, conn2, rely1, rely2, railheight=advtrains.get_track_connections(node.name, node.param2)
-	
-	--already in trackdb?
-	local rdp=vector.round(pos)
-	if not (advtrains.trackdb[traintype] and advtrains.trackdb[traintype][rdp.y] and advtrains.trackdb[traintype][rdp.y][rdp.x] and advtrains.trackdb[traintype][rdp.y][rdp.x][rdp.z]) then--TODO is this necessary?
-		if not advtrains.trackdb[traintype] then advtrains.trackdb[traintype]={} end
-		if not advtrains.trackdb[traintype][rdp.y] then advtrains.trackdb[traintype][rdp.y]={} end
-		if not advtrains.trackdb[traintype][rdp.y][rdp.x] then advtrains.trackdb[traintype][rdp.y][rdp.x]={} end
-		advtrains.trackdb[traintype][rdp.y][rdp.x][rdp.z]={
-			conn1=conn1, conn2=conn2,
-			rely1=rely1, rely2=rely2,
-			railheight=railheight
-		}
-	end
-	
-	return true, conn1, conn2, rely1, rely2, railheight
-end
-function advtrains.reset_trackdb_position(pos)
-	local rdp=vector.round(pos)
-	for tt, _ in pairs(advtrains.all_traintypes) do
-		if not advtrains.trackdb[tt] then advtrains.trackdb[tt]={} end
-		if not advtrains.trackdb[tt][rdp.y] then advtrains.trackdb[tt][rdp.y]={} end
-		if not advtrains.trackdb[tt][rdp.y][rdp.x] then advtrains.trackdb[tt][rdp.y][rdp.x]={} end
-		advtrains.trackdb[tt][rdp.y][rdp.x][rdp.z]=nil
-		advtrains.get_rail_info_at(pos, tt)--to restore it.
-	end
-end
-	
-
diff --git a/textures/advtrains_dtrack_placer.png b/textures/advtrains_dtrack_placer.png
deleted file mode 100644
index c49777c..0000000
--- a/textures/advtrains_dtrack_placer.png
+++ /dev/null
diff --git a/textures/advtrains_dtrack_rail.png b/textures/advtrains_dtrack_rail.png
deleted file mode 100644
index 568e533..0000000
--- a/textures/advtrains_dtrack_rail.png
+++ /dev/null
diff --git a/textures/advtrains_dtrack_rail_detector_on.png b/textures/advtrains_dtrack_rail_detector_on.png
deleted file mode 100644
index 3ae0dac..0000000
--- a/textures/advtrains_dtrack_rail_detector_on.png
+++ /dev/null
diff --git a/textures/advtrains_newlocomotive.png b/textures/advtrains_newlocomotive.png
deleted file mode 100644
index e461bc7..0000000
--- a/textures/advtrains_newlocomotive.png
+++ /dev/null
diff --git a/textures/advtrains_subway_train.png b/textures/advtrains_subway_train.png
deleted file mode 100644
index 1d569f3..0000000
--- a/textures/advtrains_subway_train.png
+++ /dev/null
diff --git a/textures/advtrains_wagon.png b/textures/advtrains_wagon.png
deleted file mode 100644
index c37c979..0000000
--- a/textures/advtrains_wagon.png
+++ /dev/null