Begin major rework of track registration system

17 files changed, 2443 insertions, 2150 deletions

diff --git a/advtrains/api_doc.txt b/advtrains/api_doc.txt
index 5668ba3..6b338a7 100644
--- a/advtrains/api_doc.txt
+++ b/advtrains/api_doc.txt
@@ -18,8 +18,6 @@ advtrains.register_wagon(name, prototype, description, inventory_image)
 # 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 = {
diff --git a/advtrains/copytool.lua b/advtrains/copytool.lua
index 0c1cdfe..8a6d2f7 100644
--- a/advtrains/copytool.lua
+++ b/advtrains/copytool.lua
@@ -21,7 +21,7 @@ minetest.register_tool("advtrains:copytool", {
 			local node=minetest.get_node_or_nil(pointed_thing.under)
 			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, {default=true})) then
+			if(not advtrains.is_track(nodename)) then
 				atprint("no track here, not placing.")
 				return itemstack
 			end
diff --git a/advtrains/helpers.lua b/advtrains/helpers.lua
index 7e078fb..7a774d9 100644
--- a/advtrains/helpers.lua
+++ b/advtrains/helpers.lua
@@ -294,7 +294,7 @@ end
 -- Going from the rail at pos (does not need to be rounded) along connection with id conn_idx, if there is a matching rail, return it and the matching connid
 -- returns: <adjacent pos>, <conn index of adjacent>, <my conn index>, <railheight of adjacent>
 -- parameter this_conns_p is connection table of this rail and is optional, is determined by get_rail_info_at if not provided.
-function advtrains.get_adjacent_rail(this_posnr, this_conns_p, conn_idx, drives_on)
+function advtrains.get_adjacent_rail(this_posnr, this_conns_p, conn_idx)
 	local this_pos = advtrains.round_vector_floor_y(this_posnr)
 	local this_conns = this_conns_p
 	local _
@@ -318,11 +318,11 @@ function advtrains.get_adjacent_rail(this_posnr, this_conns_p, conn_idx, drives_
 		adj_pos.y = adj_pos.y + 1
 	end
 	
-	local nextnode_ok, nextconns, nextrail_y=advtrains.get_rail_info_at(adj_pos, drives_on)
+	local nextnode_ok, nextconns, nextrail_y=advtrains.get_rail_info_at(adj_pos)
 	if not nextnode_ok then
 		adj_pos.y = adj_pos.y - 1
 		conn_y = conn_y + 1
-		nextnode_ok, nextconns, nextrail_y=advtrains.get_rail_info_at(adj_pos, drives_on)
+		nextnode_ok, nextconns, nextrail_y=advtrains.get_rail_info_at(adj_pos)
 		if not nextnode_ok then
 			return nil
 		end
diff --git a/advtrains/nodedb.lua b/advtrains/nodedb.lua
index 41ac089..39106b2 100644
--- a/advtrains/nodedb.lua
+++ b/advtrains/nodedb.lua
@@ -268,17 +268,17 @@ end
 --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)
+function advtrains.get_rail_info_at(pos)
 	local rdp=advtrains.round_vector_floor_y(pos)
 	
 	local node=ndb.get_node_or_nil(rdp)
 	if not node then return end
 	
 	local nodename=node.name
-	if(not advtrains.is_track_and_drives_on(nodename, drives_on)) then
+	if(not advtrains.is_track(nodename)) then
 		return false
 	end
-	local conns, railheight, tracktype=advtrains.get_track_connections(node.name, node.param2)
+	local conns, railheight = advtrains.get_track_connections(node.name, node.param2)
 	
 	return true, conns, railheight
 end
diff --git a/advtrains/oldtracks.lua b/advtrains/oldtracks.lua
new file mode 100644
index 0000000..c415143
--- /dev/null
+++ b/advtrains/oldtracks.lua
@@ -0,0 +1,751 @@
+--advtrains by orwell96, see readme.txt
+
+--dev-time settings:
+--EDIT HERE
+--If the old non-model rails on straight tracks should be replaced by the new...
+--false: no
+--true: yes
+advtrains.register_replacement_lbms=false
+
+--[[TracksDefinition
+nodename_prefix
+texture_prefix
+description
+common={}
+straight={}
+straight45={}
+curve={}
+curve45={}
+lswitchst={}
+lswitchst45={}
+rswitchst={}
+rswitchst45={}
+lswitchcr={}
+lswitchcr45={}
+rswitchcr={}
+rswitchcr45={}
+vert1={
+	--you'll probably want to override mesh here
+}
+vert2={
+	--you'll probably want to override mesh here
+}
+]]--
+advtrains.all_tracktypes={}
+
+--definition preparation
+local function conns(c1, c2, r1, r2) return {{c=c1, y=r1}, {c=c2, y=r2}} end
+local function conns3(c1, c2, c3, r1, r2, r3) return {{c=c1, y=r1}, {c=c2, y=r2}, {c=c3, y=r3}} end
+
+advtrains.ap={}
+advtrains.ap.t_30deg_flat={
+	regstep=1,
+	variant={
+		st={
+			conns = conns(0,8),
+			desc = "straight",
+			tpdouble = true,
+			tpsingle = true,
+			trackworker = "cr",
+		},
+		cr={
+			conns = conns(0,7),
+			desc = "curve",
+			tpdouble = true,
+			trackworker = "swlst",
+		},
+		swlst={
+			conns = conns3(0,8,7),
+			desc = "left switch (straight)",
+			trackworker = "swrst",
+			switchalt = "cr",
+			switchmc = "on",
+			switchst = "st",
+			switchprefix = "swl",
+		},
+		swlcr={
+			conns = conns3(0,7,8),
+			desc = "left switch (curve)",
+			trackworker = "swrcr",
+			switchalt = "st",
+			switchmc = "off",
+			switchst = "cr",
+			switchprefix = "swl",
+		},
+		swrst={
+			conns = conns3(0,8,9),
+			desc = "right switch (straight)",
+			trackworker = "st",
+			switchalt = "cr",
+			switchmc = "on",
+			switchst = "st",
+			switchprefix = "swr",
+		},
+		swrcr={
+			conns = conns3(0,9,8),
+			desc = "right switch (curve)",
+			trackworker = "st",
+			switchalt = "st",
+			switchmc = "off",
+			switchst = "cr",
+			switchprefix = "swr",
+		},
+	},
+	regtp=true,
+	tpdefault="st",
+	trackworker={
+		["swrcr"]="st",
+		["swrst"]="st",
+		["cr"]="swlst",
+		["swlcr"]="swrcr",
+		["swlst"]="swrst",
+	},
+	rotation={"", "_30", "_45", "_60"},
+}
+advtrains.ap.t_yturnout={
+	regstep=1,
+	variant={
+		l={
+			conns = conns3(0,7,9),
+			desc = "Y-turnout (left)",
+			switchalt = "r",
+			switchmc = "off",
+			switchst = "l",
+			switchprefix = "",
+		},
+		r={
+			conns = conns3(0,9,7),
+			desc = "Y-turnout (right)",
+			switchalt = "l",
+			switchmc = "on",
+			switchst = "r",
+			switchprefix = "",
+		}
+	},
+	regtp=true,
+	tpdefault="l",
+	rotation={"", "_30", "_45", "_60"},
+}
+advtrains.ap.t_s3way={
+	regstep=1,
+	variant={
+		l={
+			conns = { {c=0}, {c=7}, {c=8}, {c=9}, {c=0} },
+			desc = "3-way turnout (left)",
+			switchalt = "s",
+			switchst="l",
+			switchprefix = "",
+		},
+		s={
+			conns = { {c=0}, {c=8}, {c=7}, {c=9}, {c=0} },
+			desc = "3-way turnout (straight)",
+			switchalt ="r",
+			switchst = "s",
+			switchprefix = "",
+		},
+		r={
+			conns = { {c=0}, {c=9}, {c=8}, {c=7}, {c=0} },
+			desc = "3-way turnout (right)",
+			switchalt = "l",
+			switchst="r",
+			switchprefix = "",
+		}
+	},
+	regtp=true,
+	tpdefault="l",
+	rotation={"", "_30", "_45", "_60"},
+}
+advtrains.ap.t_30deg_slope={
+	regstep=1,
+	variant={
+		vst1={conns = conns(8,0,0,0.5), rail_y = 0.25, desc = "steep uphill 1/2", slope=true},
+		vst2={conns = conns(8,0,0.5,1), rail_y = 0.75, desc = "steep uphill 2/2", slope=true},
+		vst31={conns = conns(8,0,0,0.33), rail_y = 0.16, desc = "uphill 1/3", slope=true},
+		vst32={conns = conns(8,0,0.33,0.66), rail_y = 0.5, desc = "uphill 2/3", slope=true},
+		vst33={conns = conns(8,0,0.66,1), rail_y = 0.83, desc = "uphill 3/3", slope=true},
+	},
+	regsp=true,
+	slopeplacer={
+		[2]={"vst1", "vst2"},
+		[3]={"vst31", "vst32", "vst33"},
+		max=3,--highest entry
+	},
+	slopeplacer_45={
+		[2]={"vst1_45", "vst2_45"},
+		max=2,
+	},
+	rotation={"", "_30", "_45", "_60"},
+	trackworker={},
+	increativeinv={},
+}
+advtrains.ap.t_30deg_straightonly={
+	regstep=1,
+	variant={
+		st={
+			conns = conns(0,8),
+			desc = "straight",
+			tpdouble = true,
+			tpsingle = true,
+			trackworker = "st",
+		},
+	},
+	regtp=true,
+	tpdefault="st",
+	rotation={"", "_30", "_45", "_60"},
+}
+advtrains.ap.t_30deg_straightonly_noplacer={
+	regstep=1,
+	variant={
+		st={
+			conns = conns(0,8),
+			desc = "straight",
+			tpdouble = true,
+			tpsingle = true,
+			trackworker = "st",
+		},
+	},
+	tpdefault="st",
+	rotation={"", "_30", "_45", "_60"},
+}
+advtrains.ap.t_45deg={
+	regstep=2,
+	variant={
+		st={
+			conns = conns(0,8),
+			desc = "straight",
+			tpdouble = true,
+			tpsingle = true,
+			trackworker = "cr",
+		},
+		cr={
+			conns = conns(0,6),
+			desc = "curve",
+			tpdouble = true,
+			trackworker = "swlst",
+		},
+		swlst={
+			conns = conns3(0,8,6),
+			desc = "left switch (straight)",
+			trackworker = "swrst",
+			switchalt = "cr",
+			switchmc = "on",
+			switchst = "st",
+		},
+		swlcr={
+			conns = conns3(0,6,8),
+			desc = "left switch (curve)",
+			trackworker = "swrcr",
+			switchalt = "st",
+			switchmc = "off",
+			switchst = "cr",
+		},
+		swrst={
+			conns = conns3(0,8,10),
+			desc = "right switch (straight)",
+			trackworker = "st",
+			switchalt = "cr",
+			switchmc = "on",
+			switchst = "st",
+		},
+		swrcr={
+			conns = conns3(0,10,8),
+			desc = "right switch (curve)",
+			trackworker = "st",
+			switchalt = "st",
+			switchmc = "off",
+			switchst = "cr",
+		},
+	},
+	regtp=true,
+	tpdefault="st",
+	trackworker={
+		["swrcr"]="st",
+		["swrst"]="st",
+		["cr"]="swlst",
+		["swlcr"]="swrcr",
+		["swlst"]="swrst",
+	},
+	rotation={"", "_30", "_45", "_60"},
+}
+advtrains.ap.t_perpcrossing={
+	regstep = 1,
+	variant={
+		st={
+			conns = { {c=0}, {c=8}, {c=4}, {c=12} },
+			desc = "perpendicular crossing",
+			tpdouble = true,
+			tpsingle = true,
+			trackworker = "st",
+		},
+	},
+	regtp=true,
+	tpdefault="st",
+	rotation={"", "_30", "_45", "_60"},
+}
+advtrains.ap.t_90plusx_crossing={
+	regstep = 1,
+	variant={
+		["30l"]={
+			conns = { {c=0}, {c=8}, {c=1}, {c=9} },
+			desc = "30/90 degree crossing (left)",
+			tpdouble = true,
+			tpsingle = true,
+			trackworker = "45l"
+		},
+		["45l"]={
+			conns = { {c=0}, {c=8}, {c=2}, {c=10} },
+			desc = "45/90 degree crossing (left)",
+			tpdouble = true,
+			tpsingle = true,
+			trackworker = "60l",
+		},
+		["60l"]={
+			conns = { {c=0}, {c=8}, {c=3}, {c=11}},
+			desc = "60/90 degree crossing (left)",
+			tpdouble = true,
+			tpsingle = true,
+			trackworker = "60r",
+		},
+		["60r"]={
+			conns = { {c=0}, {c=8}, {c=5}, {c=13} },
+			desc = "60/90 degree crossing (right)",
+			tpdouble = true,
+			tpsingle = true,
+			trackworker = "45r"
+		},
+		["45r"]={
+			conns = { {c=0}, {c=8}, {c=6}, {c=14} },
+			desc = "45/90 degree crossing (right)",
+			tpdouble = true,
+			tpsingle = true,
+			trackworker = "30r",
+		},
+		["30r"]={
+			conns = { {c=0}, {c=8}, {c=7}, {c=15}},
+			desc = "30/90 degree crossing (right)",
+			tpdouble = true,
+			tpsingle = true,
+			trackworker = "30l",
+		},
+	},
+	regtp=true,
+	tpdefault="30l",
+	rotation={""},
+	trackworker = {
+		["30l"] = "45l",
+		["45l"] = "60l",
+		["60l"] = "60r",
+		["60r"] = "45r",
+		["45r"] = "30r",
+		["30r"] = "30l",
+	}
+}
+
+advtrains.ap.t_diagonalcrossing = {
+	regstep=1,
+	variant={
+		["30l45r"]={
+			conns = {{c=1}, {c=9}, {c=6}, {c=14}},
+			desc = "30left-45right diagonal crossing",
+			tpdouble=true,
+			tpsingle=true,
+			trackworker="60l30l",
+		},
+		["60l30l"]={
+			conns = {{c=3}, {c=11}, {c=1}, {c=9}},
+			desc = "30left-60right diagonal crossing",
+			tpdouble=true,
+			tpsingle=true,
+			trackworker="60l45r"
+		},
+		["60l45r"]={
+			conns = {{c=3}, {c=11}, {c=6}, {c=14}},
+			desc = "60left-45right diagonal crossing",
+			tpdouble=true,
+			tpsingle=true,
+			trackworker="60l60r"
+		},
+		["60l60r"]={
+			conns = {{c=3}, {c=11}, {c=5}, {c=13}},
+			desc = "60left-60right diagonal crossing",
+			tpdouble=true,
+			tpsingle=true,
+			trackworker="60r45l",
+		},
+		--If 60l60r had a mirror image, it would be here, but it's symmetric.
+		-- 60l60r is also equivalent to 30l30r but rotated 90 degrees.
+		["60r45l"]={
+			conns = {{c=5}, {c=13}, {c=2}, {c=10}},
+			desc = "60right-45left diagonal crossing",
+			tpdouble=true,
+			tpsingle=true,
+			trackworker="60r30r",
+		},
+		["60r30r"]={
+			conns = {{c=5}, {c=13}, {c=7}, {c=15}},
+			desc = "60right-30right diagonal crossing",
+			tpdouble=true,
+			tpsingle=true,
+			trackworker="30r45l",
+		},
+		["30r45l"]={
+			conns = {{c=7}, {c=15}, {c=2}, {c=10}},
+			desc = "30right-45left diagonal crossing",
+			tpdouble=true,
+			tpsingle=true,
+			trackworker="30l45r",
+		},
+
+	},
+	regtp=true,
+	tpdefault="30l45r",
+	rotation={""},
+	trackworker = {
+		["30l45r"] = "60l30l",
+		["60l30l"] = "60l45r",
+		["60l45r"] = "60l60r",
+		["60l60r"] = "60r45l",
+		["60r45l"] = "60r30r",
+		["60r30r"] = "30r45l",
+		["30r45l"] = "30l45r",
+	}
+}
+
+advtrains.trackpresets = advtrains.ap
+
+--definition format: ([] optional)
+--[[{
+	nodename_prefix
+	texture_prefix
+	[shared_texture]
+	models_prefix
+	models_suffix (with dot)
+	[shared_model]
+	formats={
+		st,cr,swlst,swlcr,swrst,swrcr,vst1,vst2
+		(each a table with indices 0-3, for if to register a rail with this 'rotation' table entry. nil is assumed as 'all', set {} to not register at all)
+	}
+	common={} change something on common rail appearance
+}
+[18.12.17] Note on new connection system:
+In order to support real rail crossing nodes and finally make the trackplacer respect switches, I changed the connection system.
+There can be a variable number of connections available. These are specified as tuples {c=<connection>, y=<rely>}
+The table "at_conns" consists of {<conn1>, <conn2>...}
+the "at_rail_y" property holds the value that was previously called "railheight"
+Depending on the number of connections:
+2 conns: regular rail
+3 conns: switch:
+	- when train passes in at conn1, will move out of conn2
+	- when train passes in at conn2 or conn3, will move out of conn1
+4 conns: cross (or cross switch, depending on arrangement of conns):
+	- conn1 <> conn2
+	- conn3 <> conn4
+]]
+
+-- Notify the user if digging the rail is not allowed
+local function can_dig_callback(pos, player)
+	local ok, reason = advtrains.can_dig_or_modify_track(pos)
+	if not ok and player then
+		minetest.chat_send_player(player:get_player_name(), attrans("This track can not be removed!") .. " " .. reason)
+	end
+	return ok
+end
+
+function advtrains.register_tracks(tracktype, def, preset)
+	advtrains.trackplacer.register_tracktype(def.nodename_prefix, preset.tpdefault)
+	if preset.regtp then
+		advtrains.trackplacer.register_track_placer(def.nodename_prefix, def.texture_prefix, def.description, def)			
+	end
+	if preset.regsp then
+		advtrains.slope.register_placer(def, preset)			
+	end
+	for suffix, var in pairs(preset.variant) do
+		for rotid, rotation in ipairs(preset.rotation) do
+			if not def.formats[suffix] or def.formats[suffix][rotid] then
+				local img_suffix = suffix..rotation
+				local ndef = advtrains.merge_tables({
+					description=def.description.."("..(var.desc or "any")..rotation..")",
+					drawtype = "mesh",
+					paramtype="light",
+					paramtype2="facedir",
+					walkable = false,
+					selection_box = {
+						type = "fixed",
+						fixed = {-1/2-1/16, -1/2, -1/2, 1/2+1/16, -1/2+2/16, 1/2},
+					},
+					
+					mesh = def.shared_model or (def.models_prefix.."_"..img_suffix..def.models_suffix),
+					tiles = {def.shared_texture or (def.texture_prefix.."_"..img_suffix..".png"), def.second_texture},
+					
+					groups = {
+						attached_node = advtrains.IGNORE_WORLD and 0 or 1,
+						advtrains_track=1,
+						["advtrains_track_"..tracktype]=1,
+						save_in_at_nodedb=1,
+						dig_immediate=2,
+						not_in_creative_inventory=1,
+						not_blocking_trains=1,
+					},
+						
+					can_dig = can_dig_callback,
+					after_dig_node=function(pos)
+						advtrains.ndb.update(pos)
+					end,
+					after_place_node=function(pos)
+						advtrains.ndb.update(pos)
+					end,
+					at_nnpref = def.nodename_prefix,
+					at_suffix = suffix,
+					at_rotation = rotation,
+					at_rail_y = var.rail_y
+				}, def.common or {})
+				
+				if preset.regtp then
+					ndef.drop = def.nodename_prefix.."_placer"
+				end
+				if preset.regsp and var.slope then
+					ndef.drop = def.nodename_prefix.."_slopeplacer"
+				end
+				
+				--connections
+				ndef.at_conns = advtrains.rotate_conn_by(var.conns, (rotid-1)*preset.regstep)
+				
+				local ndef_avt_table
+				
+				if var.switchalt and var.switchst then
+					local switchfunc=function(pos, node, newstate)
+						newstate = newstate or var.switchalt -- support for 3 (or more) state switches
+						-- this code is only called from the internal setstate function, which
+						-- ensures that it is safe to switch the turnout
+						if newstate~=var.switchst then
+							advtrains.ndb.swap_node(pos, {name=def.nodename_prefix.."_"..(var.switchprefix or "")..newstate..rotation, param2=node.param2})
+							advtrains.invalidate_all_paths(pos)
+						end
+					end
+					ndef.on_rightclick = function(pos, node, player)
+						if advtrains.check_turnout_signal_protection(pos, player:get_player_name()) then
+							advtrains.setstate(pos, nil, node)
+							advtrains.log("Switch", player:get_player_name(), pos)
+						end
+					end
+					if var.switchmc then
+						ndef.mesecons = {effector = {
+							["action_"..var.switchmc] = function(pos, node) 
+								advtrains.setstate(pos, nil, node)
+							end,
+							rules=advtrains.meseconrules
+						}}
+					end
+					ndef_avt_table = {
+						getstate = var.switchst,
+						setstate = switchfunc,
+					}
+				end
+				
+				local adef={}
+				if def.get_additional_definiton then
+					adef=def.get_additional_definiton(def, preset, suffix, rotation)
+				end
+				ndef = advtrains.merge_tables(ndef, adef)
+				
+				-- insert getstate/setstate functions after merging the additional definitions
+				if ndef_avt_table then
+					ndef.advtrains = advtrains.merge_tables(ndef.advtrains or {}, ndef_avt_table)
+				end
+
+				minetest.register_node(":"..def.nodename_prefix.."_"..suffix..rotation, ndef)
+				--trackplacer
+				if preset.regtp then
+					local tpconns = {conn1=ndef.at_conns[1].c, conn2=ndef.at_conns[2].c}
+					if var.tpdouble then
+						advtrains.trackplacer.add_double_conn(def.nodename_prefix, suffix, rotation, tpconns)
+					end
+					if var.tpsingle then
+						advtrains.trackplacer.add_single_conn(def.nodename_prefix, suffix, rotation, tpconns)
+					end
+				end
+				advtrains.trackplacer.add_worked(def.nodename_prefix, suffix, rotation, var.trackworker)
+			end
+		end
+	end
+	advtrains.all_tracktypes[tracktype]=true
+end
+
+function advtrains.is_track_and_drives_on(nodename, drives_on_p)
+	local drives_on = drives_on_p
+	if not drives_on then drives_on = advtrains.all_tracktypes end
+	local hasentry = false
+	for _,_ in pairs(drives_on) do
+		hasentry=true
+	end
+	if not hasentry then drives_on = advtrains.all_tracktypes end
+	
+	if not minetest.registered_nodes[nodename] then
+		return false
+	end
+	local nodedef=minetest.registered_nodes[nodename]
+	for k,v in pairs(drives_on) do
+		if nodedef.groups["advtrains_track_"..k] then
+			return true
+		end
+	end
+	return false
+end
+
+function advtrains.get_track_connections(name, param2)
+	local nodedef=minetest.registered_nodes[name]
+	if not nodedef then atprint(" get_track_connections couldn't find nodedef for nodename "..(name or "nil")) return nil end
+	local noderot=param2
+	if not param2 then noderot=0 end
+	if noderot > 3 then atprint(" get_track_connections: rail has invaild param2 of "..noderot) noderot=0 end
+	
+	local tracktype
+	for k,_ in pairs(nodedef.groups) do
+		local tt=string.match(k, "^advtrains_track_(.+)$")
+		if tt then
+			tracktype=tt
+		end
+	end
+	return advtrains.rotate_conn_by(nodedef.at_conns, noderot*AT_CMAX/4), (nodedef.at_rail_y or 0), tracktype
+end
+
+-- Function called when a track is about to be dug or modified by the trackworker
+-- Returns either true (ok) or false,"translated string describing reason why it isn't allowed"
+function advtrains.can_dig_or_modify_track(pos)
+	if advtrains.get_train_at_pos(pos) then
+		return false, attrans("Position is occupied by a train.")
+	end
+	-- interlocking: tcb, signal IP a.s.o.
+	if advtrains.interlocking then
+		-- TCB?
+		if advtrains.interlocking.db.get_tcb(pos) then
+			return false, attrans("There's a Track Circuit Break here.")
+		end
+		-- signal ip?
+		if advtrains.interlocking.db.is_ip_at(pos, true) then -- is_ip_at with purge parameter
+			return false, attrans("There's a Signal Influence Point here.")
+		end
+	end
+	return true
+end
+
+-- slope placer. Defined in register_tracks.
+--crafted with rail and gravel
+local sl={}
+function sl.register_placer(def, preset)
+	minetest.register_craftitem(":"..def.nodename_prefix.."_slopeplacer",{
+		description = attrans("@1 Slope", def.description),
+		inventory_image = def.texture_prefix.."_slopeplacer.png",
+		wield_image = def.texture_prefix.."_slopeplacer.png",
+		groups={},
+		on_place = sl.create_slopeplacer_on_place(def, preset)
+	})
+end
+--(itemstack, placer, pointed_thing)
+function sl.create_slopeplacer_on_place(def, preset)
+	return function(istack, player, pt)
+		if not pt.type=="node" then 
+			minetest.chat_send_player(player:get_player_name(), attrans("Can't place: not pointing at node"))
+			return istack 
+		end
+		local pos=pt.above
+		if not pos then 
+			minetest.chat_send_player(player:get_player_name(), attrans("Can't place: not pointing at node"))
+			return istack
+		end
+		local node=minetest.get_node(pos)
+		if not minetest.registered_nodes[node.name] or not minetest.registered_nodes[node.name].buildable_to then
+			minetest.chat_send_player(player:get_player_name(), attrans("Can't place: space occupied!"))
+			return istack
+		end
+		if not advtrains.check_track_protection(pos, player:get_player_name()) then 
+			minetest.record_protection_violation(pos, player:get_player_name())
+			return istack
+		end
+		--determine player orientation (only horizontal component)
+		--get_look_horizontal may not be available
+		local yaw=player.get_look_horizontal and player:get_look_horizontal() or (player:get_look_yaw() - math.pi/2)
+		
+		--rounding unit vectors is a nice way for selecting 1 of 8 directions since sin(30°) is 0.5.
+		local dirvec={x=math.floor(math.sin(-yaw)+0.5), y=0, z=math.floor(math.cos(-yaw)+0.5)}
+		--translate to direction to look up inside the preset table
+		local param2, rot45=({
+			[-1]={
+				[-1]=2,
+				[0]=3,
+				[1]=3,
+				},
+			[0]={
+				[-1]=2,
+				[1]=0,
+				},
+			[1]={
+				[-1]=1,
+				[0]=1,
+				[1]=0,
+				},
+		})[dirvec.x][dirvec.z], dirvec.x~=0 and dirvec.z~=0
+		local lookup=preset.slopeplacer
+		if rot45 then lookup=preset.slopeplacer_45 end
+		
+		--go unitvector forward and look how far the next node is
+		local step=1
+		while step<=lookup.max do
+			local node=minetest.get_node(vector.add(pos, dirvec))
+			--next node solid?
+			if not minetest.registered_nodes[node.name] or not minetest.registered_nodes[node.name].buildable_to or advtrains.is_protected(pos, player:get_player_name()) then 
+				--do slopes of this distance exist?
+				if lookup[step] then
+					if minetest.settings:get_bool("creative_mode") or istack:get_count()>=step then
+						--start placing
+						local placenodes=lookup[step]
+						while step>0 do
+							minetest.set_node(pos, {name=def.nodename_prefix.."_"..placenodes[step], param2=param2})
+							if not minetest.settings:get_bool("creative_mode") then
+								istack:take_item()
+							end
+							step=step-1
+							pos=vector.subtract(pos, dirvec)
+						end
+					else
+						minetest.chat_send_player(player:get_player_name(), attrans("Can't place: Not enough slope items left (@1 required)", step))
+					end
+				else
+					minetest.chat_send_player(player:get_player_name(), attrans("Can't place: There's no slope of length @1",step))
+				end
+				return istack
+			end
+			step=step+1
+			pos=vector.add(pos, dirvec)
+		end
+		minetest.chat_send_player(player:get_player_name(), attrans("Can't place: no supporting node at upper end."))
+		return itemstack
+	end
+end
+
+advtrains.slope=sl
+
+--END code, BEGIN definition
+--definition format: ([] optional)
+--[[{
+	nodename_prefix
+	texture_prefix
+	[shared_texture]
+	models_prefix
+	models_suffix (with dot)
+	[shared_model]
+	formats={
+		st,cr,swlst,swlcr,swrst,swrcr,vst1,vst2
+		(each a table with indices 0-3, for if to register a rail with this 'rotation' table entry. nil is assumed as 'all', set {} to not register at all)
+	}
+	common={} change something on common rail appearance
+}]]
+
+
+
+
+
+
+
+
+
diff --git a/advtrains/passive.lua b/advtrains/passive.lua
index fe4790c..76da720 100644
--- a/advtrains/passive.lua
+++ b/advtrains/passive.lua
@@ -1,9 +1,5 @@
 -- passive.lua
--- API to passive components, as described in passive_api.txt of advtrains_luaautomation
--- This has been moved to the advtrains core in turn with the interlocking system,
--- to prevent a dependency on luaautomation.
-
-local deprecation_warned = {}
+-- Rework for advtrains 2.5: The passive API now uses the reworked node_state system. Please see the comment in tracks.lua
 
 function advtrains.getstate(parpos, pnode)
 	local pos
@@ -19,20 +15,8 @@ function advtrains.getstate(parpos, pnode)
 	local node=pnode or advtrains.ndb.get_node(pos)
 	local ndef=minetest.registered_nodes[node.name]
 	local st
-	if ndef and ndef.advtrains and ndef.advtrains.getstate then
-		 st=ndef.advtrains.getstate
-	elseif ndef and ndef.luaautomation and ndef.luaautomation.getstate then
-		if not deprecation_warned[node.name] then
-			minetest.log("warning", node.name.." uses deprecated definition of ATLATC functions in the 'luaautomation' field. Please move them to the 'advtrains' field!")
-		end
-		st=ndef.luaautomation.getstate
-	else
-		return nil
-	end
-	if type(st)=="function" then
-		return st(pos, node)
-	else
-		return st
+	if ndef and ndef.advtrains then
+		return ndef.advtrains.node_state
 	end
 end
 
@@ -45,31 +29,46 @@ function advtrains.setstate(parpos, newstate, pnode)
 	end
 	if type(pos)~="table" or (not pos.x or not pos.y or not pos.z) then
 		debug.sethook()
-		error("Invalid position supplied to getstate")
+		error("Invalid position supplied to setstate")
 	end
 	local node=pnode or advtrains.ndb.get_node(pos)
 	local ndef=minetest.registered_nodes[node.name]
-	local st
-	if ndef and ndef.advtrains and ndef.advtrains.setstate then
-		 st=ndef.advtrains.setstate
-	elseif ndef and ndef.luaautomation and ndef.luaautomation.setstate then
-		if not deprecation_warned[node.name] then
-			minetest.log("warning", node.name.." uses deprecated definition of ATLATC functions in the 'luaautomation' field. Please move them to the 'advtrains' field!")
-		end
-		st=ndef.luaautomation.setstate
-	else
-		return nil
+	
+	if not ndef or not ndef.advtrains then
+		return false, "missing_node_def"
+	end
+	local old_state = ndef.advtrains.node_state
+	
+	if old_state == newstate then
+		-- nothing needs to be done
+		return true
 	end
 	
+	if not ndef.advtrains.node_state_map then
+		return false, "missing_node_state_map"
+	end
+	local new_node_name = ndef.advtrains.node_state_map[newstate]
+	if not new_node_name then
+		return false, "no_such_state"
+	end
+	
+	-- prevent state switching when route lock or train is present
 	if advtrains.get_train_at_pos(pos) then
-		return false
+		return false, "train_here"
 	end
 	
 	if advtrains.interlocking and advtrains.interlocking.route.has_route_lock(minetest.pos_to_string(pos)) then
-		return false
+		return false, "route_lock_here"
 	end
 	
-	st(pos, node, newstate)
+	-- perform the switch
+	local new_node = {name = new_node_name, param2 = node.param2}
+	advtrains.ndb.swap_node(pos, new_node)
+	-- if callback is present, call it
+	if ndef.advtrains.node_on_switch_state then
+		ndef.advtrains.node_on_switch_state(pos, new_node, old_state, newstate)
+	end
+
 	return true
 end
 
@@ -86,12 +85,7 @@ function advtrains.is_passive(parpos, pnode)
 	end
 	local node=pnode or advtrains.ndb.get_node(pos)
 	local ndef=minetest.registered_nodes[node.name]
-	if ndef and ndef.advtrains and ndef.advtrains.getstate then
-		return true
-	elseif ndef and ndef.luaautomation and ndef.luaautomation.getstate then
-		if not deprecation_warned[node.name] then
-			minetest.log("warning", node.name.." uses deprecated definition of ATLATC functions in the 'luaautomation' field. Please move them to the 'advtrains' field!")
-		end
+	if ndef and ndef.advtrains and ndef.advtrains.node_state_map then
 		return true
 	else
 		return false
@@ -102,20 +96,10 @@ end
 function advtrains.set_fallback_state(pos, pnode)
 	local node=pnode or advtrains.ndb.get_node(pos)
 	local ndef=minetest.registered_nodes[node.name]
-	local st
-	if ndef and ndef.advtrains and ndef.advtrains.setstate
-			and ndef.advtrains.fallback_state then
-		if advtrains.get_train_at_pos(pos) then
-			return false
-		end
-		
-		if advtrains.interlocking and advtrains.interlocking.route.has_route_lock(minetest.pos_to_string(pos)) then
-			return false
-		end
-		
-		ndef.advtrains.setstate(pos, node, ndef.advtrains.fallback_state)
-		return true
-	end
 	
+	if not ndef or not ndef.advtrains or not ndef.advtrains.node_fallback_state then
+		return false, "no_fallback_state"
+	end
 	
+	return advtrains.setstate(pos, ndef.advtrains.node_fallback_state, node)
 end
diff --git a/advtrains/path.lua b/advtrains/path.lua
index 19387b1..72ee05d 100644
--- a/advtrains/path.lua
+++ b/advtrains/path.lua
@@ -33,13 +33,12 @@
 -- If you need to proceed along the path by a specific actual distance, it does NOT work to simply add it to the index. You should use the path_get_index_by_offset() function.
 
 -- creates the path data structure, reconstructing the train from a position and a connid
--- Important! train.drives_on must exist while calling this method
 -- returns: true - successful
 --           nil - node not yet available/unloaded, please wait
 --         false - node definitely gone, remove train
 function advtrains.path_create(train, pos, connid, rel_index)
 	local posr = advtrains.round_vector_floor_y(pos)
-	local node_ok, conns, rhe = advtrains.get_rail_info_at(pos, train.drives_on)
+	local node_ok, conns, rhe = advtrains.get_rail_info_at(pos)
 	if not node_ok then
 		return node_ok
 	end
@@ -211,7 +210,7 @@ function advtrains.path_get(train, index)
 		if pef == train.path_trk_f then
 			node_ok, this_conns = advtrains.get_rail_info_at(pos)
 			if not node_ok then error("For train "..train.id..": Path item "..pef.." on-track but not a valid node!") end
-			adj_pos, adj_connid, conn_idx, nextrail_y, next_conns = advtrains.get_adjacent_rail(pos, this_conns, connid, train.drives_on)
+			adj_pos, adj_connid, conn_idx, nextrail_y, next_conns = advtrains.get_adjacent_rail(pos, this_conns, connid)
 		end
 		pef = pef + 1
 		if adj_pos then
@@ -250,7 +249,7 @@ function advtrains.path_get(train, index)
 		if peb == train.path_trk_b then
 			node_ok, this_conns = advtrains.get_rail_info_at(pos)
 			if not node_ok then error("For train "..train.id..": Path item "..peb.." on-track but not a valid node!") end
-			adj_pos, adj_connid, conn_idx, nextrail_y, next_conns = advtrains.get_adjacent_rail(pos, this_conns, connid, train.drives_on)
+			adj_pos, adj_connid, conn_idx, nextrail_y, next_conns = advtrains.get_adjacent_rail(pos, this_conns, connid)
 		end
 		peb = peb - 1
 		if adj_pos then
diff --git a/advtrains/signals.lua b/advtrains/signals.lua
index b26c950..58d28a5 100644
--- a/advtrains/signals.lua
+++ b/advtrains/signals.lua
@@ -40,9 +40,6 @@ local suppasp = {
 
 for r,f in pairs({on={as="off", ls="green", als="red"}, off={as="on", ls="red", als="green"}}) do
 
-	advtrains.trackplacer.register_tracktype("advtrains:retrosignal", "")
-	advtrains.trackplacer.register_tracktype("advtrains:signal", "")
-
 	for rotid, rotation in ipairs({"", "_30", "_45", "_60"}) do
 		local crea=1
 		if rotid==1 and r=="off" then crea=0 end
@@ -108,8 +105,8 @@ for r,f in pairs({on={as="off", ls="green", als="red"}, off={as="on", ls="red",
 			},
 			can_dig = can_dig_func,
 			after_dig_node = after_dig_func,
+			--TODO add rotation using trackworker
 		})
-		advtrains.trackplacer.add_worked("advtrains:retrosignal", r, rotation, nil)
 		
 		minetest.register_node("advtrains:signal_"..r..rotation, {
 			drawtype = "mesh",
@@ -179,8 +176,8 @@ for r,f in pairs({on={as="off", ls="green", als="red"}, off={as="on", ls="red",
 			},
 			can_dig = can_dig_func,
 			after_dig_node = after_dig_func,
+			--TODO add rotation using trackworker
 		})
-		advtrains.trackplacer.add_worked("advtrains:signal", r, rotation, nil)
 	end
 	
 	local crea=1
diff --git a/advtrains/trackplacer.lua b/advtrains/trackplacer.lua
index fe76290..9d63199 100644
--- a/advtrains/trackplacer.lua
+++ b/advtrains/trackplacer.lua
@@ -3,311 +3,204 @@
 
 --all new trackplacer code
 local tp={
-	tracks={}
+	groups={}
 }
 
-function tp.register_tracktype(nnprefix, n_suffix)
-	if tp.tracks[nnprefix] then return end--due to the separate registration of slopes and flats for the same nnpref, definition would be overridden here. just don't.
-	tp.tracks[nnprefix]={
-		default=n_suffix,
-		single_conn={},
-		single_conn_1={},
-		single_conn_2={},
-		double_conn={},
-		double_conn_1={},
-		double_conn_2={},
-		--keys:conn1_conn2 (example:1_4)
-		--values:{name=x, param2=x}
-		twcycle={},
-		twrotate={},--indexed by suffix, list, tells order of rotations
-		modify={},
-	}
-end
-function tp.add_double_conn(nnprefix, suffix, rotation, conns)
-	local nodename=nnprefix.."_"..suffix..rotation
-	for i=0,3 do
-		tp.tracks[nnprefix].double_conn[((conns.conn1+4*i)%16).."_"..((conns.conn2+4*i)%16)]={name=nodename, param2=i}
-		tp.tracks[nnprefix].double_conn[((conns.conn2+4*i)%16).."_"..((conns.conn1+4*i)%16)]={name=nodename, param2=i}
-		tp.tracks[nnprefix].double_conn_1[((conns.conn1+4*i)%16).."_"..((conns.conn2+4*i)%16)]={name=nodename, param2=i}
-		tp.tracks[nnprefix].double_conn_2[((conns.conn2+4*i)%16).."_"..((conns.conn1+4*i)%16)]={name=nodename, param2=i}
-	end
-	tp.tracks[nnprefix].modify[nodename]=true
-end
-function tp.add_single_conn(nnprefix, suffix, rotation, conns)
-	local nodename=nnprefix.."_"..suffix..rotation
-	for i=0,3 do
-		tp.tracks[nnprefix].single_conn[((conns.conn1+4*i)%16)]={name=nodename, param2=i}
-		tp.tracks[nnprefix].single_conn[((conns.conn2+4*i)%16)]={name=nodename, param2=i}
-		tp.tracks[nnprefix].single_conn_1[((conns.conn1+4*i)%16)]={name=nodename, param2=i}
-		tp.tracks[nnprefix].single_conn_2[((conns.conn2+4*i)%16)]={name=nodename, param2=i}
-	end
-	tp.tracks[nnprefix].modify[nodename]=true
-end
+--[[ New in version 2.5:
 
+The track placer no longer uses hacky nodename pattern matching.
+The base criterion for rotating or matching tracks is the common "ndef.advtrains.track_place_group" property.
+Only rails where this field is set are considered for replacement. Other rails can still be considered for connection.
+Replacement ("bending") of rails can only happen within their respective track place group. Only two-conn rails are allowed in the trackplacer.
 
-function tp.add_worked(nnprefix, suffix, rotation, cycle_follows)
-	tp.tracks[nnprefix].twcycle[suffix]=cycle_follows
-	if not tp.tracks[nnprefix].twrotate[suffix] then tp.tracks[nnprefix].twrotate[suffix]={} end
-	table.insert(tp.tracks[nnprefix].twrotate[suffix], rotation)
-end
+The track registration functions register the candidates for any given track_place_group in two separate collections:
+- double: tracks that can be used to connect both ends of the rail
+- single: tracks that will be used to connect conn1 when only a single end is to be connected
 
+When track placing is requested, the calling code just supplies the track_place_group to be placed.
 
---[[
-	rewrite algorithm.
-	selection criteria: these will never be changed or even selected:
-	- tracks being already connected on both sides
-	- tracks that are already connected on one side but are not bendable to the desired position
-	the following situations can occur:
-	1. there are two more than two rails around
-		1.1 there is one or more subset(s) that can be directly connected
-			-> choose the first possibility
-		2.2 not
-			-> choose the first one and orient straight
-	2. there's exactly 1 rail around
-		-> choose and orient straight
-	3. there's no rail around
-		-> set straight
-]]
+]]--
 
-local function istrackandbc(pos_p, conn)
-	local tpos = pos_p
-	local cnode=minetest.get_node(advtrains.dirCoordSet(tpos, conn.c))
-	if advtrains.is_track_and_drives_on(cnode.name, advtrains.all_tracktypes) then
-		local cconns=advtrains.get_track_connections(cnode.name, cnode.param2)
-		return advtrains.conn_matches_to(conn, cconns)
-	end
-	--try the same 1 node below
-	tpos = {x=tpos.x, y=tpos.y-1, z=tpos.z}
-	cnode=minetest.get_node(advtrains.dirCoordSet(tpos, conn.c))
-	if advtrains.is_track_and_drives_on(cnode.name, advtrains.all_tracktypes) then
-		local cconns=advtrains.get_track_connections(cnode.name, cnode.param2)
-		return advtrains.conn_matches_to(conn, cconns)
-	end
-	return false
+local function rotate(conn, rot)
+	return (conn + rot) % 16
 end
 
-function tp.find_already_connected(pos)
-	local dnode=minetest.get_node(pos)
-	local dconns=advtrains.get_track_connections(dnode.name, dnode.param2)
-	local found_conn
-	for connid, conn in ipairs(dconns) do
-		if istrackandbc(pos, conn) then
-			if found_conn then --we found one in previous iteration
-				return true, true --signal that it's connected
-			else
-				found_conn = conn.c
+-- Register a track node as candidate
+-- tpg: the track place group to register the candidates for
+-- name, ndef: the node name and node definition table to register
+-- as_single: whether the rail should be considered as candidate for one-endpoint connection
+--            Typically only set for the straight rail variants
+-- as_double: whether the rail should be considered as candidate for two-endpoint connection
+--            Typically set for straights and curves
+function tp.register_candidate(tpg, name, ndef, as_single, as_double)
+	--get or create TP group
+	if not tp.groups[tpg] then
+		tp.groups[tpg] = {double = {}, single1 = {}, single2 = {}, default = {name = name, param2 = 0} }
+		-- note: this causes the first candidate to ever be registered to be the default (which is typically what you want)
+	end
+	local g = tp.groups[tpg]
+	
+	-- get conns
+	assert(#ndef.at_conns == 2)
+	local c1, c2 = ndef.at_conns[1].c, ndef.at_conns[2].c
+	local is_symmetrical = (rotate(c1, 8) == c2)
+	
+	-- store all possible rotations (param2 values)
+	for i=0,3 do
+		if as_double then
+			g.double[rotate(c1,i*4).."_"..rotate(c2,i*4)] = {name=name, param2=i}
+			if not is_symmmetrical then
+				g.double[rotate(c2,i*4).."_"..rotate(c1,i*4)] = {name=name, param2=i}
+				-- if the track is unsymmetric (e.g. a curve), we may require the "wrong" orientation to fill a gap.
 			end
 		end
+		if as_single then
+			g.single1[rotate(c1,i*4)] = {name=name, param2=i}
+			g.single2[rotate(c2,i*4)] = {name=name, param2=i}
+		end
 	end
-	return found_conn
 end
-function tp.rail_and_can_be_bent(originpos, conn)
-	local pos=advtrains.dirCoordSet(originpos, conn)
-	local newdir=(conn+8)%16
-	local node=minetest.get_node(pos)
-	if not advtrains.is_track_and_drives_on(node.name, advtrains.all_tracktypes) then
+
+local function check_or_bend_rail(origin, dir, pname, commit)
+	local pos = advtrains.pos_add_dir(origin, dir)
+	local back_dir = advtrains.oppd(dir);
+	
+	local node_ok, conns = advtrains.get_rail_info_at(pos)
+	if not node_ok then
+		-- try the node one level below
+		pos.y = pos.y - 1
+		node_ok, conns = advtrains.get_rail_info_at(pos)
+	end
+	if not node_ok then
 		return false
 	end
-	local ndef=minetest.registered_nodes[node.name]
-	local nnpref = ndef and ndef.at_nnpref
-	if not nnpref then return false end
-	local tr=tp.tracks[nnpref]
-	if not tr then return false end
-	if not tr.modify[node.name] then 
-		--we actually can use this rail, but only if it already points to the desired direction.
-		if advtrains.is_track_and_drives_on(node.name, advtrains.all_tracktypes) then
-			local cconns=advtrains.get_track_connections(node.name, node.param2)
-			return advtrains.conn_matches_to(conn, cconns)
+	-- if one conn of the node here already points towards us, nothing to do
+	for connid, conn in ipairs(conns) do
+		if back_dir == conn.c then
+			return true
 		end
 	end
-	-- If the rail is not allowed to be modified, also only use if already in desired direction
+	-- can we bend the node here?
+	local node = advtrains.ndb.get_node(pos)
+	local ndef = minetest.registered_nodes[node.name]
+	if not ndef or not ndef.advtrains or not ndef.advtrains.track_place_group then
+		return false
+	end
+	-- now the track must be two-conn, else it wouldn't be allowed to have track_place_group set.
+	assert(#conns == 2)
+	-- Is player and game allowed to do this?
 	if not advtrains.can_dig_or_modify_track(pos) then
-		local cconns=advtrains.get_track_connections(node.name, node.param2)
-		return advtrains.conn_matches_to(conn, cconns)
+		return false
 	end
-	--rail at other end?
-	local adj1, adj2=tp.find_already_connected(pos)
-	if adj1 and adj2 then
-		return false--dont destroy existing track
-	elseif adj1 and not adj2 then
-		if tr.double_conn[adj1.."_"..newdir] then
-			return true--if exists, connect new rail and old end
-		end
+	if not advtrains.check_track_protection(pos, pname) then
 		return false
-	else
-		if tr.single_conn[newdir] then--just rotate old rail to right orientation
-			return true
+	end
+	-- we confirmed that track can be modified. Does there exist a suitable connection candidate?
+	-- check if there are any unbound ends
+	local bound_connids = {}
+	for connid, conn in ipairs(conns) do
+		local adj_pos, adj_connid = advtrains.get_adjacent_rail(pos, conns, connid)
+		if adj_pos then
+			bound_connids[#bound_connids+1] = connid
 		end
-		return false
 	end
-end
-function tp.bend_rail(originpos, conn)
-	local pos=advtrains.dirCoordSet(originpos, conn)
-	local newdir=advtrains.oppd(conn)
-	local node=minetest.get_node(pos)
-	local ndef=minetest.registered_nodes[node.name]
-	local nnpref = ndef and ndef.at_nnpref
-	if not nnpref then return false end
-	local tr=tp.tracks[nnpref]
-	if not tr then return false end
-	--is rail already connected? no need to bend.
-	local conns=advtrains.get_track_connections(node.name, node.param2)
-	if advtrains.conn_matches_to(conn, conns) then
-		return
+	-- depending on the nummber of ends, decide
+	if #bound_connids == 2 then
+		-- rail is within a fixed track, do not break up
+		return false
 	end
-	--rail at other end?
-	local adj1, adj2=tp.find_already_connected(pos)
-	if adj1 and adj2 then
-		return false--dont destroy existing track
-	elseif adj1 and not adj2 then
-		if tr.double_conn[adj1.."_"..newdir] then
-			advtrains.ndb.swap_node(pos, tr.double_conn[adj1.."_"..newdir])
-			return true--if exists, connect new rail and old end
+	-- obtain the group table
+	local g = tp.groups[ndef.advtrains.track_place_group]
+	if #bound_connids == 1 then
+		-- we can attempt double
+		local bound_dir = conns[bound_connids[1]].c
+		if g.double[back_dir.."_"..bound_dir] then
+			if commit then
+				advtrains.ndb.swap_node(pos, g.double[back_dir.."_"..bound_dir])
+			end
+			return true
 		end
-		return false
 	else
-		if tr.single_conn[newdir] then--just rotate old rail to right orientation
-			advtrains.ndb.swap_node(pos, tr.single_conn[newdir])
+		-- rail is entirely unbound, we can attempt single1
+		if g.single1[back_dir] then
+			if commit then
+				advtrains.ndb.swap_node(pos, g.single1[back_dir])
+			end
 			return true
 		end
-		return false
 	end
 end
-function tp.placetrack(pos, nnpref, placer, itemstack, pointed_thing, yaw)
-	--1. find all rails that are likely to be connected
-	local tr=tp.tracks[nnpref]
-	local p_rails={}
-	local p_railpos={}
+
+local function track_place_node(pos, node, ndef)
+	advtrains.ndb.swap_node(pos, node)
+	local ndef = minetest.registered_nodes[node.name]
+	if ndef and ndef.after_place_node then
+		ndef.after_place_node(pos)
+	end
+end
+
+
+-- Main API function to place a track. Replaces the older "placetrack"
+-- This function will attempt to place a track of the specified track placing group at the specified position, connecting it
+-- with neighboring rails. Neighboring rails can themselves be replaced ("bent") within their own track place group,
+-- if the player is permitted to do this.
+-- Order of preference is:
+--    Connect two track ends if possible
+--    Connect one track end if any rail is near
+--    Place the default track if no tracks are near
+-- The function returns true on success.
+function tp.place_track(pos, tpg, pname, yaw)
+	-- 1. collect neighboring tracks and whether they can be connected
+	local cand = {}
 	for i=0,15 do
-		if tp.rail_and_can_be_bent(pos, i, nnpref) then
-			p_rails[#p_rails+1]=i
-			p_railpos[i] = pos
-		else
-			local upos = {x=pos.x, y=pos.y-1, z=pos.z}
-			if tp.rail_and_can_be_bent(upos, i, nnpref) then
-				p_rails[#p_rails+1]=i
-				p_railpos[i] = upos
-			end
+		if check_or_bend_rail(pos, i, pname) then
+			cand[#cand+1] = i
 		end
 	end
-	
-	-- try double_conn
-	if #p_rails > 1 then
-		--iterate subsets
-		for k1, conn1 in ipairs(p_rails) do
-			for k2, conn2 in ipairs(p_rails) do
-				if k1~=k2 then
-					local dconn1 = tr.double_conn_1
-					local dconn2 = tr.double_conn_2
-					if not (advtrains.yawToDirection(yaw, conn1, conn2) == conn1) then
-						dconn1 = tr.double_conn_2
-						dconn2 = tr.double_conn_1
-					end
-					-- Checks are made this way round so that dconn1 has priority (this will make arrows of atc rails
-					-- point in the right direction)
-					local using
-					if (dconn2[conn1.."_"..conn2]) then
-						using = dconn2[conn1.."_"..conn2]
-					end
-					if (dconn1[conn1.."_"..conn2]) then
-						using = dconn1[conn1.."_"..conn2]
-					end
-					if using then
-						-- has found a fitting rail in either direction
-						-- if not, continue loop
-						tp.bend_rail(p_railpos[conn1], conn1, nnpref)
-						tp.bend_rail(p_railpos[conn2], conn2, nnpref)
-						advtrains.ndb.swap_node(pos, using)
-						local nname=using.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
+	-- obtain the group table
+	local g = tp.groups[tpg]
+	-- 2. try all possible two-endpoint connections
+	for k1, conn1 in ipairs(cand) do
+		for k2, conn2 in ipairs(cand) do
+			if k1~=k2 then
+				-- order of conn1/conn2: prefer conn2 being in the direction of the player facing.
+				-- the combination the other way round will be run through in a later loop iteration
+				if advtrains.yawToDirection(yaw, conn1, conn2) == conn2 then
+					-- does there exist a suitable double-connection rail?
+					local node = g.double[conn1.."_"..conn2]
+					if node then
+						check_or_bend_rail(pos, conn1, pname, true)
+						check_or_bend_rail(pos, conn2, pname, true)
+						track_place_node(pos, node) -- calls after_place_node implicitly
+						return true
 					end
 				end
 			end
 		end
 	end
-	-- try single_conn
-	if #p_rails > 0 then
-		for ix, p_rail in ipairs(p_rails) do
-			local sconn1 = tr.single_conn_1
-			local sconn2 = tr.single_conn_2
-			if not (advtrains.yawToDirection(yaw, p_rail, (p_rail+8)%16) == p_rail) then
-				sconn1 = tr.single_conn_2
-				sconn2 = tr.single_conn_1
-			end
-			if sconn1[p_rail] then
-				local using = sconn1[p_rail]
-				tp.bend_rail(p_railpos[p_rail], p_rail, nnpref)
-				advtrains.ndb.swap_node(pos, using)
-				local nname=using.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
-			if sconn2[p_rail] then
-				local using = sconn2[p_rail]
-				tp.bend_rail(p_railpos[p_rail], p_rail, nnpref)
-				advtrains.ndb.swap_node(pos, using)
-				local nname=using.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
+	-- 3. try all possible one_endpoint connections
+	for k1, conn1 in ipairs(cand) do
+		-- select single1 or single2? depending on yaw
+		local single
+		if advtrains.yawToDirection(yaw, conn1, advtrains.oppd(conn1)) == conn1 then
+			single = g.single1
+		else
+			single = g.single2
+		end
+		local node = single[conn1]
+		if node then
+			check_or_bend_rail(pos, conn1, pname, true)
+			track_place_node(pos, node) -- calls after_place_node implicitly
+			return true
 		end
 	end
-	--use default
-	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
+	-- 4. if nothing worked, set the default
+	local node = g.default
+	track_place_node(pos, node) -- calls after_place_node implicitly
+	return true
 end
 
-
-function tp.register_track_placer(nnprefix, imgprefix, dispname, def)
-	minetest.register_craftitem(":"..nnprefix.."_placer",{
-		description = dispname,
-		inventory_image = imgprefix.."_placer.png",
-		wield_image = imgprefix.."_placer.png",
-		groups={advtrains_trackplacer=1, digtron_on_place=1},
-		liquids_pointable = def.liquids_pointable,
-		on_place = function(itemstack, placer, pointed_thing)
-				local name = placer:get_player_name()
-				if not name then
-				   return itemstack, false
-				end
-				if pointed_thing.type=="node" then
-					local pos=pointed_thing.above
-					local upos=vector.subtract(pointed_thing.above, {x=0, y=1, z=0})
-					if not advtrains.check_track_protection(pos, name) then
-						return itemstack, false
-					end
-					if minetest.registered_nodes[minetest.get_node(pos).name] and minetest.registered_nodes[minetest.get_node(pos).name].buildable_to then
-						local s
-						if def.suitable_substrate then
-							s = def.suitable_substrate(upos)
-						else
-							s = minetest.registered_nodes[minetest.get_node(upos).name] and minetest.registered_nodes[minetest.get_node(upos).name].walkable
-						end
-						if s then
---						minetest.chat_send_all(nnprefix)
-							local yaw = placer:get_look_horizontal()
-							tp.placetrack(pos, nnprefix, placer, itemstack, pointed_thing, yaw)
-							if not advtrains.is_creative(name) then
-								itemstack:take_item()
-							end
-						end
-					end
-				end
-				return itemstack, true
-		end,
-	})
-end
-
-
+-- TRACK WORKER --
 
 minetest.register_craftitem("advtrains:trackworker",{
 	description = attrans("Track Worker Tool\n\nLeft-click: change rail type (straight/curve/switch)\nRight-click: rotate rail/bumper/signal/etc."),
@@ -316,116 +209,93 @@ minetest.register_craftitem("advtrains:trackworker",{
 	wield_image = "advtrains_trackworker.png",
 	stack_max = 1,
 	on_place = function(itemstack, placer, pointed_thing)
-			local name = placer:get_player_name()
-			if not name then
+		local name = placer:get_player_name()
+		if not name then
+			return
+		end
+		local has_aux1_down = placer:get_player_control().aux1
+		if pointed_thing.type=="node" then
+			local pos=pointed_thing.under
+			if not advtrains.check_track_protection(pos, name) then
 				return
 			end
-			local has_aux1_down = placer:get_player_control().aux1
-			if pointed_thing.type=="node" then
-				local pos=pointed_thing.under
-				if not advtrains.check_track_protection(pos, name) then
-					return
-				end
-				local node=minetest.get_node(pos)
+			local node=minetest.get_node(pos)
 
-				--if not advtrains.is_track_and_drives_on(minetest.get_node(pos).name, advtrains.all_tracktypes) then return end
-				
-				local nnprefix, suffix, rotation=string.match(node.name, "^(.+)_([^_]+)(_[^_]+)$")
-				--atdebug(node.name.."\npattern recognizes:"..nnprefix.." / "..suffix.." / "..rotation)
-				--atdebug("nntab: ",tp.tracks[nnprefix])
-				if not tp.tracks[nnprefix] or not tp.tracks[nnprefix].twrotate[suffix] then
-					nnprefix, suffix=string.match(node.name, "^(.+)_([^_]+)$")
-					rotation = ""
-					if not tp.tracks[nnprefix] or not tp.tracks[nnprefix].twrotate[suffix] then
-						minetest.chat_send_player(placer:get_player_name(), attrans("This node can't be rotated using the trackworker!"))
-						return
-					end
-				end
-				
-				-- check if the node is modify-protected
-				if advtrains.is_track_and_drives_on(minetest.get_node(pos).name, advtrains.all_tracktypes) then
-					-- is a track, we can query
-					local can_modify, reason = advtrains.can_dig_or_modify_track(pos)
-					if not can_modify then
-						local str = attrans("This track can not be rotated!")
-						if reason then
-							str = str .. " " .. reason
-						end
-						minetest.chat_send_player(placer:get_player_name(), str)
-						return
+			-- New since 2.5: only the fields in the node definition are considered, no more hacky pattern matching on the nodename
+			
+			local ndef = minetest.registered_nodes[node.name]
+			
+			if not ndef.advtrains or not ndef.advtrains.trackworker_next_rot then
+				minetest.chat_send_player(placer:get_player_name(), attrans("This node can't be rotated using the trackworker!"))
+				return
+			end
+			
+			-- check if the node is modify-protected
+			if advtrains.is_track(node.name) then
+				-- is a track, we can query
+				local can_modify, reason = advtrains.can_dig_or_modify_track(pos)
+				if not can_modify then
+					local str = attrans("This track can not be rotated!")
+					if reason then
+						str = str .. " " .. reason
 					end
-				end
-				
-				if has_aux1_down then
-					--feature: flip the node by 180°
-					--i've always wanted this!
-					advtrains.ndb.swap_node(pos, {name=node.name, param2=(node.param2+2)%4})
+					minetest.chat_send_player(placer:get_player_name(), str)
 					return
 				end
-				
-				local modext=tp.tracks[nnprefix].twrotate[suffix]
-
-				if rotation==modext[#modext] then --increase param2
-					advtrains.ndb.swap_node(pos, {name=nnprefix.."_"..suffix..modext[1], param2=(node.param2+1)%4})
-					return
-				else
-					local modpos
-					for k,v in pairs(modext) do
-						if v==rotation then modpos=k end
-					end
-					if not modpos then
-						minetest.chat_send_player(placer:get_player_name(), attrans("This node can't be rotated using the trackworker!"))
-						return
-					end
-					advtrains.ndb.swap_node(pos, {name=nnprefix.."_"..suffix..modext[modpos+1], param2=node.param2})
-				end
 			end
+			
+			if has_aux1_down then
+				--feature: flip the node by 180°
+				--i've always wanted this!
+				advtrains.ndb.swap_node(pos, {name=node.name, param2=(node.param2+2)%4})
+				return
+			end
+			
+			local new_node = {name = ndef.advtrains.trackworker_next_rot, param2 = node.param2}
+			if ndef.advtrains.trackworker_rot_incr_param2 then
+				new_node.param2 = ((node.param2 + 1) % 4)
+			end
+			advtrains.ndb.swap_node(pos, new_node)
+		end
 	end,
 	on_use=function(itemstack, user, pointed_thing)
-				local name = user:get_player_name()
-			if not name then
-			   return
+		local name = user:get_player_name()
+		if not name then
+		   return
+		end
+		if pointed_thing.type=="node" then
+			local pos=pointed_thing.under
+			local node=minetest.get_node(pos)
+			if not advtrains.check_track_protection(pos, name) then
+				return
 			end
-			if pointed_thing.type=="node" then
-				local pos=pointed_thing.under
-				local node=minetest.get_node(pos)
-				if not advtrains.check_track_protection(pos, name) then
-					return
-				end
-				
-				--if not advtrains.is_track_and_drives_on(minetest.get_node(pos).name, advtrains.all_tracktypes) then return end
-				if advtrains.get_train_at_pos(pos) then return end
-				local nnprefix, suffix, rotation=string.match(node.name, "^(.+)_([^_]+)(_[^_]+)$")
-				--atdebug(node.name.."\npattern recognizes:"..nodeprefix.." / "..railtype.." / "..rotation)
-				if not tp.tracks[nnprefix] or not tp.tracks[nnprefix].twcycle[suffix] then
-				  nnprefix, suffix=string.match(node.name, "^(.+)_([^_]+)$")
-				  rotation = ""
-				  if not tp.tracks[nnprefix] or not tp.tracks[nnprefix].twcycle[suffix] then
-					minetest.chat_send_player(user:get_player_name(), attrans("This node can't be changed using the trackworker!"))
-					return
-				  end
-				end
-				
-				-- check if the node is modify-protected
-				if advtrains.is_track_and_drives_on(minetest.get_node(pos).name, advtrains.all_tracktypes) then
-					-- is a track, we can query
-					local can_modify, reason = advtrains.can_dig_or_modify_track(pos)
-					if not can_modify then
-						local str = attrans("This track can not be changed!")
-						if reason then
-							str = str .. " " .. reason
-						end
-						minetest.chat_send_player(user:get_player_name(), str)
-						return
+			
+			-- New since 2.5: only the fields in the node definition are considered, no more hacky pattern matching on the nodename
+			
+			local ndef = minetest.registered_nodes[node.name]
+			
+			if not ndef.advtrains or not ndef.advtrains.trackworker_next_var then
+				minetest.chat_send_player(placer:get_player_name(), attrans("This node can't be changed using the trackworker!"))
+				return
+			end
+			
+			-- check if the node is modify-protected
+			if advtrains.is_track(node.name) then
+				-- is a track, we can query
+				local can_modify, reason = advtrains.can_dig_or_modify_track(pos)
+				if not can_modify then
+					local str = attrans("This track can not be rotated!")
+					if reason then
+						str = str .. " " .. reason
 					end
+					minetest.chat_send_player(placer:get_player_name(), str)
+					return
 				end
-				
-				local nextsuffix=tp.tracks[nnprefix].twcycle[suffix]
-				advtrains.ndb.swap_node(pos, {name=nnprefix.."_"..nextsuffix..rotation, param2=node.param2})
-				
-			else
-				atprint(name, dump(tp.tracks))
 			end
+			
+			local new_node = {name = ndef.advtrains.trackworker_next_var, param2 = node.param2}
+			advtrains.ndb.swap_node(pos, new_node)
+		end
 	end,
 })
 
diff --git a/advtrains/tracks.lua b/advtrains/tracks.lua
index c415143..dc2d909 100644
--- a/advtrains/tracks.lua
+++ b/advtrains/tracks.lua
@@ -1,751 +1,287 @@
---advtrains by orwell96, see readme.txt
-
---dev-time settings:
---EDIT HERE
---If the old non-model rails on straight tracks should be replaced by the new...
---false: no
---true: yes
-advtrains.register_replacement_lbms=false
-
---[[TracksDefinition
-nodename_prefix
-texture_prefix
-description
-common={}
-straight={}
-straight45={}
-curve={}
-curve45={}
-lswitchst={}
-lswitchst45={}
-rswitchst={}
-rswitchst45={}
-lswitchcr={}
-lswitchcr45={}
-rswitchcr={}
-rswitchcr45={}
-vert1={
-	--you'll probably want to override mesh here
-}
-vert2={
-	--you'll probably want to override mesh here
-}
-]]--
-advtrains.all_tracktypes={}
-
---definition preparation
-local function conns(c1, c2, r1, r2) return {{c=c1, y=r1}, {c=c2, y=r2}} end
-local function conns3(c1, c2, c3, r1, r2, r3) return {{c=c1, y=r1}, {c=c2, y=r2}, {c=c3, y=r3}} end
-
-advtrains.ap={}
-advtrains.ap.t_30deg_flat={
-	regstep=1,
-	variant={
-		st={
-			conns = conns(0,8),
-			desc = "straight",
-			tpdouble = true,
-			tpsingle = true,
-			trackworker = "cr",
-		},
-		cr={
-			conns = conns(0,7),
-			desc = "curve",
-			tpdouble = true,
-			trackworker = "swlst",
-		},
-		swlst={
-			conns = conns3(0,8,7),
-			desc = "left switch (straight)",
-			trackworker = "swrst",
-			switchalt = "cr",
-			switchmc = "on",
-			switchst = "st",
-			switchprefix = "swl",
-		},
-		swlcr={
-			conns = conns3(0,7,8),
-			desc = "left switch (curve)",
-			trackworker = "swrcr",
-			switchalt = "st",
-			switchmc = "off",
-			switchst = "cr",
-			switchprefix = "swl",
-		},
-		swrst={
-			conns = conns3(0,8,9),
-			desc = "right switch (straight)",
-			trackworker = "st",
-			switchalt = "cr",
-			switchmc = "on",
-			switchst = "st",
-			switchprefix = "swr",
-		},
-		swrcr={
-			conns = conns3(0,9,8),
-			desc = "right switch (curve)",
-			trackworker = "st",
-			switchalt = "st",
-			switchmc = "off",
-			switchst = "cr",
-			switchprefix = "swr",
-		},
-	},
-	regtp=true,
-	tpdefault="st",
-	trackworker={
-		["swrcr"]="st",
-		["swrst"]="st",
-		["cr"]="swlst",
-		["swlcr"]="swrcr",
-		["swlst"]="swrst",
-	},
-	rotation={"", "_30", "_45", "_60"},
-}
-advtrains.ap.t_yturnout={
-	regstep=1,
-	variant={
-		l={
-			conns = conns3(0,7,9),
-			desc = "Y-turnout (left)",
-			switchalt = "r",
-			switchmc = "off",
-			switchst = "l",
-			switchprefix = "",
-		},
-		r={
-			conns = conns3(0,9,7),
-			desc = "Y-turnout (right)",
-			switchalt = "l",
-			switchmc = "on",
-			switchst = "r",
-			switchprefix = "",
-		}
-	},
-	regtp=true,
-	tpdefault="l",
-	rotation={"", "_30", "_45", "_60"},
-}
-advtrains.ap.t_s3way={
-	regstep=1,
-	variant={
-		l={
-			conns = { {c=0}, {c=7}, {c=8}, {c=9}, {c=0} },
-			desc = "3-way turnout (left)",
-			switchalt = "s",
-			switchst="l",
-			switchprefix = "",
-		},
-		s={
-			conns = { {c=0}, {c=8}, {c=7}, {c=9}, {c=0} },
-			desc = "3-way turnout (straight)",
-			switchalt ="r",
-			switchst = "s",
-			switchprefix = "",
-		},
-		r={
-			conns = { {c=0}, {c=9}, {c=8}, {c=7}, {c=0} },
-			desc = "3-way turnout (right)",
-			switchalt = "l",
-			switchst="r",
-			switchprefix = "",
-		}
-	},
-	regtp=true,
-	tpdefault="l",
-	rotation={"", "_30", "_45", "_60"},
-}
-advtrains.ap.t_30deg_slope={
-	regstep=1,
-	variant={
-		vst1={conns = conns(8,0,0,0.5), rail_y = 0.25, desc = "steep uphill 1/2", slope=true},
-		vst2={conns = conns(8,0,0.5,1), rail_y = 0.75, desc = "steep uphill 2/2", slope=true},
-		vst31={conns = conns(8,0,0,0.33), rail_y = 0.16, desc = "uphill 1/3", slope=true},
-		vst32={conns = conns(8,0,0.33,0.66), rail_y = 0.5, desc = "uphill 2/3", slope=true},
-		vst33={conns = conns(8,0,0.66,1), rail_y = 0.83, desc = "uphill 3/3", slope=true},
-	},
-	regsp=true,
-	slopeplacer={
-		[2]={"vst1", "vst2"},
-		[3]={"vst31", "vst32", "vst33"},
-		max=3,--highest entry
-	},
-	slopeplacer_45={
-		[2]={"vst1_45", "vst2_45"},
-		max=2,
-	},
-	rotation={"", "_30", "_45", "_60"},
-	trackworker={},
-	increativeinv={},
-}
-advtrains.ap.t_30deg_straightonly={
-	regstep=1,
-	variant={
-		st={
-			conns = conns(0,8),
-			desc = "straight",
-			tpdouble = true,
-			tpsingle = true,
-			trackworker = "st",
-		},
-	},
-	regtp=true,
-	tpdefault="st",
-	rotation={"", "_30", "_45", "_60"},
-}
-advtrains.ap.t_30deg_straightonly_noplacer={
-	regstep=1,
-	variant={
-		st={
-			conns = conns(0,8),
-			desc = "straight",
-			tpdouble = true,
-			tpsingle = true,
-			trackworker = "st",
-		},
-	},
-	tpdefault="st",
-	rotation={"", "_30", "_45", "_60"},
-}
-advtrains.ap.t_45deg={
-	regstep=2,
-	variant={
-		st={
-			conns = conns(0,8),
-			desc = "straight",
-			tpdouble = true,
-			tpsingle = true,
-			trackworker = "cr",
-		},
-		cr={
-			conns = conns(0,6),
-			desc = "curve",
-			tpdouble = true,
-			trackworker = "swlst",
-		},
-		swlst={
-			conns = conns3(0,8,6),
-			desc = "left switch (straight)",
-			trackworker = "swrst",
-			switchalt = "cr",
-			switchmc = "on",
-			switchst = "st",
-		},
-		swlcr={
-			conns = conns3(0,6,8),
-			desc = "left switch (curve)",
-			trackworker = "swrcr",
-			switchalt = "st",
-			switchmc = "off",
-			switchst = "cr",
-		},
-		swrst={
-			conns = conns3(0,8,10),
-			desc = "right switch (straight)",
-			trackworker = "st",
-			switchalt = "cr",
-			switchmc = "on",
-			switchst = "st",
-		},
-		swrcr={
-			conns = conns3(0,10,8),
-			desc = "right switch (curve)",
-			trackworker = "st",
-			switchalt = "st",
-			switchmc = "off",
-			switchst = "cr",
-		},
-	},
-	regtp=true,
-	tpdefault="st",
-	trackworker={
-		["swrcr"]="st",
-		["swrst"]="st",
-		["cr"]="swlst",
-		["swlcr"]="swrcr",
-		["swlst"]="swrst",
-	},
-	rotation={"", "_30", "_45", "_60"},
-}
-advtrains.ap.t_perpcrossing={
-	regstep = 1,
-	variant={
-		st={
-			conns = { {c=0}, {c=8}, {c=4}, {c=12} },
-			desc = "perpendicular crossing",
-			tpdouble = true,
-			tpsingle = true,
-			trackworker = "st",
-		},
-	},
-	regtp=true,
-	tpdefault="st",
-	rotation={"", "_30", "_45", "_60"},
-}
-advtrains.ap.t_90plusx_crossing={
-	regstep = 1,
-	variant={
-		["30l"]={
-			conns = { {c=0}, {c=8}, {c=1}, {c=9} },
-			desc = "30/90 degree crossing (left)",
-			tpdouble = true,
-			tpsingle = true,
-			trackworker = "45l"
-		},
-		["45l"]={
-			conns = { {c=0}, {c=8}, {c=2}, {c=10} },
-			desc = "45/90 degree crossing (left)",
-			tpdouble = true,
-			tpsingle = true,
-			trackworker = "60l",
-		},
-		["60l"]={
-			conns = { {c=0}, {c=8}, {c=3}, {c=11}},
-			desc = "60/90 degree crossing (left)",
-			tpdouble = true,
-			tpsingle = true,
-			trackworker = "60r",
-		},
-		["60r"]={
-			conns = { {c=0}, {c=8}, {c=5}, {c=13} },
-			desc = "60/90 degree crossing (right)",
-			tpdouble = true,
-			tpsingle = true,
-			trackworker = "45r"
-		},
-		["45r"]={
-			conns = { {c=0}, {c=8}, {c=6}, {c=14} },
-			desc = "45/90 degree crossing (right)",
-			tpdouble = true,
-			tpsingle = true,
-			trackworker = "30r",
-		},
-		["30r"]={
-			conns = { {c=0}, {c=8}, {c=7}, {c=15}},
-			desc = "30/90 degree crossing (right)",
-			tpdouble = true,
-			tpsingle = true,
-			trackworker = "30l",
-		},
-	},
-	regtp=true,
-	tpdefault="30l",
-	rotation={""},
-	trackworker = {
-		["30l"] = "45l",
-		["45l"] = "60l",
-		["60l"] = "60r",
-		["60r"] = "45r",
-		["45r"] = "30r",
-		["30r"] = "30l",
-	}
-}
-
-advtrains.ap.t_diagonalcrossing = {
-	regstep=1,
-	variant={
-		["30l45r"]={
-			conns = {{c=1}, {c=9}, {c=6}, {c=14}},
-			desc = "30left-45right diagonal crossing",
-			tpdouble=true,
-			tpsingle=true,
-			trackworker="60l30l",
-		},
-		["60l30l"]={
-			conns = {{c=3}, {c=11}, {c=1}, {c=9}},
-			desc = "30left-60right diagonal crossing",
-			tpdouble=true,
-			tpsingle=true,
-			trackworker="60l45r"
-		},
-		["60l45r"]={
-			conns = {{c=3}, {c=11}, {c=6}, {c=14}},
-			desc = "60left-45right diagonal crossing",
-			tpdouble=true,
-			tpsingle=true,
-			trackworker="60l60r"
-		},
-		["60l60r"]={
-			conns = {{c=3}, {c=11}, {c=5}, {c=13}},
-			desc = "60left-60right diagonal crossing",
-			tpdouble=true,
-			tpsingle=true,
-			trackworker="60r45l",
-		},
-		--If 60l60r had a mirror image, it would be here, but it's symmetric.
-		-- 60l60r is also equivalent to 30l30r but rotated 90 degrees.
-		["60r45l"]={
-			conns = {{c=5}, {c=13}, {c=2}, {c=10}},
-			desc = "60right-45left diagonal crossing",
-			tpdouble=true,
-			tpsingle=true,
-			trackworker="60r30r",
-		},
-		["60r30r"]={
-			conns = {{c=5}, {c=13}, {c=7}, {c=15}},
-			desc = "60right-30right diagonal crossing",
-			tpdouble=true,
-			tpsingle=true,
-			trackworker="30r45l",
-		},
-		["30r45l"]={
-			conns = {{c=7}, {c=15}, {c=2}, {c=10}},
-			desc = "30right-45left diagonal crossing",
-			tpdouble=true,
-			tpsingle=true,
-			trackworker="30l45r",
-		},
-
-	},
-	regtp=true,
-	tpdefault="30l45r",
-	rotation={""},
-	trackworker = {
-		["30l45r"] = "60l30l",
-		["60l30l"] = "60l45r",
-		["60l45r"] = "60l60r",
-		["60l60r"] = "60r45l",
-		["60r45l"] = "60r30r",
-		["60r30r"] = "30r45l",
-		["30r45l"] = "30l45r",
-	}
-}
-
-advtrains.trackpresets = advtrains.ap
-
---definition format: ([] optional)
---[[{
-	nodename_prefix
-	texture_prefix
-	[shared_texture]
-	models_prefix
-	models_suffix (with dot)
-	[shared_model]
-	formats={
-		st,cr,swlst,swlcr,swrst,swrcr,vst1,vst2
-		(each a table with indices 0-3, for if to register a rail with this 'rotation' table entry. nil is assumed as 'all', set {} to not register at all)
-	}
-	common={} change something on common rail appearance
-}
-[18.12.17] Note on new connection system:
-In order to support real rail crossing nodes and finally make the trackplacer respect switches, I changed the connection system.
-There can be a variable number of connections available. These are specified as tuples {c=<connection>, y=<rely>}
-The table "at_conns" consists of {<conn1>, <conn2>...}
-the "at_rail_y" property holds the value that was previously called "railheight"
-Depending on the number of connections:
-2 conns: regular rail
-3 conns: switch:
-	- when train passes in at conn1, will move out of conn2
-	- when train passes in at conn2 or conn3, will move out of conn1
-4 conns: cross (or cross switch, depending on arrangement of conns):
-	- conn1 <> conn2
-	- conn3 <> conn4
-]]
-
--- Notify the user if digging the rail is not allowed
-local function can_dig_callback(pos, player)
-	local ok, reason = advtrains.can_dig_or_modify_track(pos)
-	if not ok and player then
-		minetest.chat_send_player(player:get_player_name(), attrans("This track can not be removed!") .. " " .. reason)
-	end
-	return ok
-end
-
-function advtrains.register_tracks(tracktype, def, preset)
-	advtrains.trackplacer.register_tracktype(def.nodename_prefix, preset.tpdefault)
-	if preset.regtp then
-		advtrains.trackplacer.register_track_placer(def.nodename_prefix, def.texture_prefix, def.description, def)			
-	end
-	if preset.regsp then
-		advtrains.slope.register_placer(def, preset)			
-	end
-	for suffix, var in pairs(preset.variant) do
-		for rotid, rotation in ipairs(preset.rotation) do
-			if not def.formats[suffix] or def.formats[suffix][rotid] then
-				local img_suffix = suffix..rotation
-				local ndef = advtrains.merge_tables({
-					description=def.description.."("..(var.desc or "any")..rotation..")",
-					drawtype = "mesh",
-					paramtype="light",
-					paramtype2="facedir",
-					walkable = false,
-					selection_box = {
-						type = "fixed",
-						fixed = {-1/2-1/16, -1/2, -1/2, 1/2+1/16, -1/2+2/16, 1/2},
-					},
-					
-					mesh = def.shared_model or (def.models_prefix.."_"..img_suffix..def.models_suffix),
-					tiles = {def.shared_texture or (def.texture_prefix.."_"..img_suffix..".png"), def.second_texture},
-					
-					groups = {
-						attached_node = advtrains.IGNORE_WORLD and 0 or 1,
-						advtrains_track=1,
-						["advtrains_track_"..tracktype]=1,
-						save_in_at_nodedb=1,
-						dig_immediate=2,
-						not_in_creative_inventory=1,
-						not_blocking_trains=1,
-					},
-						
-					can_dig = can_dig_callback,
-					after_dig_node=function(pos)
-						advtrains.ndb.update(pos)
-					end,
-					after_place_node=function(pos)
-						advtrains.ndb.update(pos)
-					end,
-					at_nnpref = def.nodename_prefix,
-					at_suffix = suffix,
-					at_rotation = rotation,
-					at_rail_y = var.rail_y
-				}, def.common or {})
-				
-				if preset.regtp then
-					ndef.drop = def.nodename_prefix.."_placer"
-				end
-				if preset.regsp and var.slope then
-					ndef.drop = def.nodename_prefix.."_slopeplacer"
-				end
-				
-				--connections
-				ndef.at_conns = advtrains.rotate_conn_by(var.conns, (rotid-1)*preset.regstep)
-				
-				local ndef_avt_table
-				
-				if var.switchalt and var.switchst then
-					local switchfunc=function(pos, node, newstate)
-						newstate = newstate or var.switchalt -- support for 3 (or more) state switches
-						-- this code is only called from the internal setstate function, which
-						-- ensures that it is safe to switch the turnout
-						if newstate~=var.switchst then
-							advtrains.ndb.swap_node(pos, {name=def.nodename_prefix.."_"..(var.switchprefix or "")..newstate..rotation, param2=node.param2})
-							advtrains.invalidate_all_paths(pos)
-						end
-					end
-					ndef.on_rightclick = function(pos, node, player)
-						if advtrains.check_turnout_signal_protection(pos, player:get_player_name()) then
-							advtrains.setstate(pos, nil, node)
-							advtrains.log("Switch", player:get_player_name(), pos)
-						end
-					end
-					if var.switchmc then
-						ndef.mesecons = {effector = {
-							["action_"..var.switchmc] = function(pos, node) 
-								advtrains.setstate(pos, nil, node)
-							end,
-							rules=advtrains.meseconrules
-						}}
-					end
-					ndef_avt_table = {
-						getstate = var.switchst,
-						setstate = switchfunc,
-					}
-				end
-				
-				local adef={}
-				if def.get_additional_definiton then
-					adef=def.get_additional_definiton(def, preset, suffix, rotation)
-				end
-				ndef = advtrains.merge_tables(ndef, adef)
-				
-				-- insert getstate/setstate functions after merging the additional definitions
-				if ndef_avt_table then
-					ndef.advtrains = advtrains.merge_tables(ndef.advtrains or {}, ndef_avt_table)
-				end
-
-				minetest.register_node(":"..def.nodename_prefix.."_"..suffix..rotation, ndef)
-				--trackplacer
-				if preset.regtp then
-					local tpconns = {conn1=ndef.at_conns[1].c, conn2=ndef.at_conns[2].c}
-					if var.tpdouble then
-						advtrains.trackplacer.add_double_conn(def.nodename_prefix, suffix, rotation, tpconns)
-					end
-					if var.tpsingle then
-						advtrains.trackplacer.add_single_conn(def.nodename_prefix, suffix, rotation, tpconns)
-					end
-				end
-				advtrains.trackplacer.add_worked(def.nodename_prefix, suffix, rotation, var.trackworker)
-			end
-		end
-	end
-	advtrains.all_tracktypes[tracktype]=true
-end
-
-function advtrains.is_track_and_drives_on(nodename, drives_on_p)
-	local drives_on = drives_on_p
-	if not drives_on then drives_on = advtrains.all_tracktypes end
-	local hasentry = false
-	for _,_ in pairs(drives_on) do
-		hasentry=true
-	end
-	if not hasentry then drives_on = advtrains.all_tracktypes end
-	
-	if not minetest.registered_nodes[nodename] then
-		return false
-	end
-	local nodedef=minetest.registered_nodes[nodename]
-	for k,v in pairs(drives_on) do
-		if nodedef.groups["advtrains_track_"..k] then
-			return true
-		end
-	end
-	return false
-end
-
-function advtrains.get_track_connections(name, param2)
-	local nodedef=minetest.registered_nodes[name]
-	if not nodedef then atprint(" get_track_connections couldn't find nodedef for nodename "..(name or "nil")) return nil end
-	local noderot=param2
-	if not param2 then noderot=0 end
-	if noderot > 3 then atprint(" get_track_connections: rail has invaild param2 of "..noderot) noderot=0 end
-	
-	local tracktype
-	for k,_ in pairs(nodedef.groups) do
-		local tt=string.match(k, "^advtrains_track_(.+)$")
-		if tt then
-			tracktype=tt
-		end
-	end
-	return advtrains.rotate_conn_by(nodedef.at_conns, noderot*AT_CMAX/4), (nodedef.at_rail_y or 0), tracktype
-end
-
--- Function called when a track is about to be dug or modified by the trackworker
--- Returns either true (ok) or false,"translated string describing reason why it isn't allowed"
-function advtrains.can_dig_or_modify_track(pos)
-	if advtrains.get_train_at_pos(pos) then
-		return false, attrans("Position is occupied by a train.")
-	end
-	-- interlocking: tcb, signal IP a.s.o.
-	if advtrains.interlocking then
-		-- TCB?
-		if advtrains.interlocking.db.get_tcb(pos) then
-			return false, attrans("There's a Track Circuit Break here.")
-		end
-		-- signal ip?
-		if advtrains.interlocking.db.is_ip_at(pos, true) then -- is_ip_at with purge parameter
-			return false, attrans("There's a Signal Influence Point here.")
-		end
-	end
-	return true
-end
-
--- slope placer. Defined in register_tracks.
---crafted with rail and gravel
-local sl={}
-function sl.register_placer(def, preset)
-	minetest.register_craftitem(":"..def.nodename_prefix.."_slopeplacer",{
-		description = attrans("@1 Slope", def.description),
-		inventory_image = def.texture_prefix.."_slopeplacer.png",
-		wield_image = def.texture_prefix.."_slopeplacer.png",
-		groups={},
-		on_place = sl.create_slopeplacer_on_place(def, preset)
-	})
-end
---(itemstack, placer, pointed_thing)
-function sl.create_slopeplacer_on_place(def, preset)
-	return function(istack, player, pt)
-		if not pt.type=="node" then 
-			minetest.chat_send_player(player:get_player_name(), attrans("Can't place: not pointing at node"))
-			return istack 
-		end
-		local pos=pt.above
-		if not pos then 
-			minetest.chat_send_player(player:get_player_name(), attrans("Can't place: not pointing at node"))
-			return istack
-		end
-		local node=minetest.get_node(pos)
-		if not minetest.registered_nodes[node.name] or not minetest.registered_nodes[node.name].buildable_to then
-			minetest.chat_send_player(player:get_player_name(), attrans("Can't place: space occupied!"))
-			return istack
-		end
-		if not advtrains.check_track_protection(pos, player:get_player_name()) then 
-			minetest.record_protection_violation(pos, player:get_player_name())
-			return istack
-		end
-		--determine player orientation (only horizontal component)
-		--get_look_horizontal may not be available
-		local yaw=player.get_look_horizontal and player:get_look_horizontal() or (player:get_look_yaw() - math.pi/2)
-		
-		--rounding unit vectors is a nice way for selecting 1 of 8 directions since sin(30°) is 0.5.
-		local dirvec={x=math.floor(math.sin(-yaw)+0.5), y=0, z=math.floor(math.cos(-yaw)+0.5)}
-		--translate to direction to look up inside the preset table
-		local param2, rot45=({
-			[-1]={
-				[-1]=2,
-				[0]=3,
-				[1]=3,
-				},
-			[0]={
-				[-1]=2,
-				[1]=0,
-				},
-			[1]={
-				[-1]=1,
-				[0]=1,
-				[1]=0,
-				},
-		})[dirvec.x][dirvec.z], dirvec.x~=0 and dirvec.z~=0
-		local lookup=preset.slopeplacer
-		if rot45 then lookup=preset.slopeplacer_45 end
-		
-		--go unitvector forward and look how far the next node is
-		local step=1
-		while step<=lookup.max do
-			local node=minetest.get_node(vector.add(pos, dirvec))
-			--next node solid?
-			if not minetest.registered_nodes[node.name] or not minetest.registered_nodes[node.name].buildable_to or advtrains.is_protected(pos, player:get_player_name()) then 
-				--do slopes of this distance exist?
-				if lookup[step] then
-					if minetest.settings:get_bool("creative_mode") or istack:get_count()>=step then
-						--start placing
-						local placenodes=lookup[step]
-						while step>0 do
-							minetest.set_node(pos, {name=def.nodename_prefix.."_"..placenodes[step], param2=param2})
-							if not minetest.settings:get_bool("creative_mode") then
-								istack:take_item()
-							end
-							step=step-1
-							pos=vector.subtract(pos, dirvec)
-						end
-					else
-						minetest.chat_send_player(player:get_player_name(), attrans("Can't place: Not enough slope items left (@1 required)", step))
-					end
-				else
-					minetest.chat_send_player(player:get_player_name(), attrans("Can't place: There's no slope of length @1",step))
-				end
-				return istack
-			end
-			step=step+1
-			pos=vector.add(pos, dirvec)
-		end
-		minetest.chat_send_player(player:get_player_name(), attrans("Can't place: no supporting node at upper end."))
-		return itemstack
-	end
-end
-
-advtrains.slope=sl
-
---END code, BEGIN definition
---definition format: ([] optional)
---[[{
-	nodename_prefix
-	texture_prefix
-	[shared_texture]
-	models_prefix
-	models_suffix (with dot)
-	[shared_model]
-	formats={
-		st,cr,swlst,swlcr,swrst,swrcr,vst1,vst2
-		(each a table with indices 0-3, for if to register a rail with this 'rotation' table entry. nil is assumed as 'all', set {} to not register at all)
-	}
-	common={} change something on common rail appearance
-}]]
-
-
-
-
-
-
-
-
-
+-- tracks.lua

+-- rewritten with advtrains 2.5 according to new track registration system

+

+

+--[[

+

+Tracks in advtrains are defined by the node definition. They must have at least 2 connections, but can have any number.

+Switchable nodes (turnouts, single/double-slip switches) are implemented by having a separate node (node name) for each of the possible states.

+

+	minetest.register_node(nodename, {

+	... usual node definition ...

+	groups = {

+		advtrains_track = 1,

+		advtrains_track_<tracktype>=1

+		^- these groups tell that the node is a track

+		not_blocking_trains=1,

+		^- this group tells that the node should not block trains although it's walkable.

+	},

+	

+	at_rail_y = 0,

+	^- Height of this rail node (the y position of a wagon that stands centered on this rail)

+	at_conns = {

+		  [1] = { c=0..15, y=0..1 },

+		  [2] = { c=0..15, y=0..1 },

+		( [3] = { c=0..15, y=0..1 }, )

+		( [4] = { c=0..15, y=0..1 }, )

+		( ... )

+	}

+	^- Connections of this rail. There are two general cases:

+	   a) SIMPLE TRACK - the track has exactly 2 connections, and does not feature a turnout, crossing or other contraption

+	      For simple tracks, except for the at_conns table no further setup needs to be specified. A train entering on conn 1 will go out at conn 2 and vice versa.

+		  A track with only one connection defined is not permitted.

+	   b) COMPOUND TRACK - the track has more than 2 connections

+	      This will be used for turnouts and crossings. Tracks with more than 2 conns MUST define 'at_conn_map'.

+		  Switchable nodes, whose state can be changed (e.g. turnouts) MUST define a 'state_map' within the advtrains table as well.

+		  This differs from the behavior up until 2.4.2, where the conn mapping was fixed.

+	^- Connection definition:

+	   - c is the direction of the connection (0-16). For the mapping to world directions see helpers.lua.

+	   - Connections will be auto-rotated with param2 of the node (horizontal, param2 values 0-3 only)

+	   - y is the height of the connection (rail will only connect when this matches)

+	^- The index of a connection inside the conns table (1, 2, 3, ...) is referred throughout advtrains code as 'connid'

+	^- IMPORTANT: For switchable nodes (any kind of turnout), it is crucial that for all of the node's variants the at_conns table stays the same. See below.

+	   

+	at_conn_map = {

+		[1] = 2,

+		[2] = 1,

+		[3] = 1,

+	}

+	^- Connection map of this rail. It specifies when a train enters the track on connid X, on which connid it will leave

+	   This field MUST be specified when the number of connections in at_conns is greater than 2

+	   This field may, and obviously will, vary between nodes for switchable nodes.

+	

+	can_dig = advtrains.track_can_dig_callback

+	after_dig_node = advtrains.track_update_callback

+	after_place_node = advtrains.track_update_callback

+	^- the code in these 3 default minetest API functions is required for advtrains to work, however you can add your own code

+	

+	on_rightclick = advtrains.state_node_on_rightclick_callback

+	^- Must be added if the node is a turnout and if it should be switched by right-click. It will cause the turnout to be switched to next_state.

+	

+	advtrains = {

+		on_train_enter=function(pos, train_id, train, index) end

+		^- called when a train enters the rail

+		on_train_leave=function(pos, train_id, train, index) end

+		^- called when a train leaves the rail

+		

+		-- The following function is only in effect when interlocking is enabled:

+		on_train_approach = function(pos, train_id, train, index, has_entered, lzbdata)

+		^- called when a train is approaching this position, called exactly once for every path recalculation (which can happen at any time)

+		^- This is called so that if the train would start braking now, it would come to halt about(wide approx) 5 nodes before the rail.

+		^- has_entered: when true, the train is already standing on this node with its front tip, and the enter callback has already been called.

+		   Possibly, some actions need not to be taken in this case. Only set if it's the very first node the train is standing on.

+		^- lzbdata should be ignored and nothing should be assigned to it

+		

+		-- The following information is required if the node is a turnout (e.g. can be switched into different positions)

+		node_state = "st"

+		^- The name of the state this node represents

+		^- Conventions for this field are as follows:

+		   - Two-way straight/turn switches: 'st'=straight branch, 'cr'=diverting/turn branch

+		   - 3-way turnouts, Y-turnouts: 'l'=left branch, 's'=straight branch, 'r'=right branch

+		   

+		node_next_state = "cr"

+		^- The name of the state that the turnout should be switched to when it is right-clicked

+		

+		node_fallback_state = "st"

+		^- The name of the state that the turnout should "fall back" to when it is released

+		   Only used by the interlocking system, when a route on the node is released it is switched back to this state.

+		

+		node_state_map = {

+			["st"] = "<node name of the st variant>",

+			["cr"] = "<node name of the cr variant>",

+			... etc ...

+		}

+		^- Map of state name to the appropriate node name that should be set by advtrains when a switch is requested

+		   Note that for all of those nodes, the at_conns table must be identical (however the conn_map will vary)

+		   

+		node_on_switch_state = function(pos, node, oldstate, newstate)

+		^- Called when the node state is switched by advtrains, after the node replacement has commenced.

+		

+		Turnout switching can happen programmatically via advtrains.setstate(pos, state), via user right_click or via the interlocking system.

+		In no other situation is it permissible to exchange track nodes in-place, unless both at_conns and at_conn_map stay identical.

+		

+		Note that the fields node_state, node_next_state and node_state_map completely replace the getstate/setstate functions.

+		There must be a one-to-one mapping between states and node names and no function can be defined for state switching.

+		This principle enables the seamless working of the interlocking autorouter and reduces failure points.

+		The node_state_* system can also be used as drop-in replacement for the passive-API-enabled nodes (andrews-cross, mesecon_switch etc.)

+		The advtrains API functions advtrains.getstate() and advtrains.setstate() remain the programmatic access points, but will now utilize the new state system.

+		

+		

+		trackworker_next_rot = <nodename of next rotation step>,

+		^- if set, right-click with trackworker will set this node

+		trackworker_rot_incr_param2 = true

+		^- if set, trackworker will increase node param2 on rightclick

+		

+		trackworker_next_var = <nodename of next variant>

+		^- if set, left-click with trackworker will set this node

+	}

+	})

+

+]]--

+

+-- This file provides some utilities to register tracks, but tries to not get into the way too much

+

+

+function advtrains.track_can_dig_callback(pos, player)

+	local ok, reason = advtrains.can_dig_or_modify_track(pos)

+	if not ok and player then

+		minetest.chat_send_player(player:get_player_name(), attrans("This track can not be removed!") .. " " .. reason)

+	end

+	return ok

+end

+

+function advtrains.track_update_callback(pos)

+	advtrains.ndb.update(pos)

+end

+

+function advtrains.state_node_on_rightclick_callback(pos, node, player)

+	if advtrains.check_turnout_signal_protection(pos, player:get_player_name()) then

+		local ndef = minetest.registered_nodes[node.name]

+		if ndef and ndef.advtrains and ndef.advtrains.node_next_state then

+			advtrains.setstate(pos, ndef.advtrains.node_next_state, node)

+			advtrains.log("Switch", player:get_player_name(), pos)

+		end

+	end

+end

+

+-- advtrains.register_node_4rot(name, nodedef)

+-- Registers four rotations for the node defined by nodedef (0°, 30°, 45° and 60°; the 4 90°-steps are already handled by the param2, resulting in 16 directions total).

+-- You must provide the definition for the base node, and certain fields are altered automatically for the 3 additional rotations:

+--  name: appends the suffix "_30", "_45" or "_60"

+--  description: appends the rotation (human-readable) in parenthesis

+--  tiles_prefix: if defined, "tiles" field will be set as prefix..rotationExtension..".png"

+--  mesh_prefix, mesh_suffix: if defined, "mesh" field will be set as prefix..rotationExtension..suffix

+--  at_conns: are rotated according to the node rotation

+--  node_state_map, trackworker_next_var: appends the suffix appropriately.

+--  groups: applies save_in_at_nodedb and not_blocking_trains groups if not already present

+-- The nodes are registered in the trackworker to be rotated with right-click.

+-- definition_mangling_function is an optional parameter. For each of the 4 rotations, it gets passed the modified node definition and may perform final modifications to it.

+--  signature: function definition_mangling_function(name, nodedef, rotationIndex, rotationSuffix)

+--  Example usage: define the setstate function of turnouts (if that is not done via the "automatic" way of state_node_map)

+local rotations = {

+	{i = 0, s = "",    h = " (0)",  n = "_30"},

+	{i = 1, s = "_30", h = " (30)", n = "_45"},

+	{i = 2, s = "_45", h = " (45)", n = "_60"},

+	{i = 3, s = "_60", h = " (60)", n = ""},

+}

+function advtrains.register_node_4rot(ori_name, ori_ndef, definition_mangling_function)

+	for _, rot in ipairs(rotations) do

+		local ndef = table.copy(ori_ndef)

+		if ori_ndef.advtrains then

+			-- make sure advtrains table is deep-copied because we may need to replace node_state_map

+			ndef.advtrains = table.copy(ori_ndef.advtrains)

+		else

+			ndef.advtrains = {} -- we need the table later for trackworker

+		end

+		-- Perform the name mangling

+		local suffix = rot.s

+		local name = ori_name..suffix

+		ndef.description = ori_ndef.description .. rot.h

+		if ori_ndef.tiles_prefix then

+			ndef.tiles = { ori_ndef.tiles_prefix .. suffix .. ".png" }

+		end

+		if ori_ndef.mesh_prefix then

+			ndef.mesh = ori_ndef.mesh_prefix .. suffix .. ori_ndef.mesh_suffix

+		end

+		-- rotate connections

+		if ori_ndef.at_conns then

+			ndef.at_conns = advtrains.rotate_conn_by(ori_ndef.at_conns, rot.i)

+		end

+		-- update node state map if present

+		if ori_ndef.advtrains then

+			if ori_ndef.advtrains.node_state_map then

+				local new_nsm = {}

+				for state, nname in pairs(ori_ndef.advtrains.node_state_map) do

+					new_nsm[state] = nname .. suffix

+				end

+				ndef.advtrains.node_state_map = new_nsm

+			end

+			if ori_ndef.advtrains.trackworker_next_var then

+				ndef.advtrains.trackworker_next_var = ori_ndef.advtrains.trackworker_next_var .. suffix

+			end

+			-- apply trackworker rot field

+			ndef.advtrains.trackworker_next_rot = ori_name .. rot.n

+			ndef.advtrains.trackworker_rot_incr_param2 = (rot.n=="")

+		end

+		-- apply groups

+		ndef.groups.save_in_at_nodedb = 1

+		ndef.groups.not_blocking_trains = 1

+		

+		-- give the definition mangling function an option to do some adjustments

+		if definition_mangling_function then

+			definition_mangling_function(name, ndef, rot.i, suffix)

+		end

+		

+		-- register node

+		atdebug("Registering: ",name, ndef)

+		minetest.register_node(":"..name, ndef)

+		

+		-- if this has the track_place_group set, register as a candidate for the track_place_group

+		if ndef.advtrains.track_place_group then

+			advtrains.trackplacer.register_candidate(ndef.advtrains.track_place_group, name, ndef, ndef.advtrains.track_place_single, true)

+		end

+	end

+end

+

+

+-- Registers an item to place and automatically connect nearby tracks

+function advtrains.register_track_placer(...)

+

+end

+

+-- Registers an item to place and adjust slope tracks

+function advtrains.register_slope_placer(...)

+

+end

+

+

+

+-- track-related helper functions

+

+function advtrains.is_track(nodename)

+	if not minetest.registered_nodes[nodename] then

+		return false

+	end

+	local nodedef=minetest.registered_nodes[nodename]

+	if nodedef and nodedef.groups.advtrains_track then

+		return true

+	end

+	return false

+end

+

+function advtrains.get_track_connections(name, param2)

+	local nodedef=minetest.registered_nodes[name]

+	if not nodedef then atprint(" get_track_connections couldn't find nodedef for nodename "..(name or "nil")) return nil end

+	local noderot=param2

+	if not param2 then noderot=0 end

+	if noderot > 3 then atprint(" get_track_connections: rail has invaild param2 of "..noderot) noderot=0 end

+	

+	local tracktype

+	for k,_ in pairs(nodedef.groups) do

+		local tt=string.match(k, "^advtrains_track_(.+)$")

+		if tt then

+			tracktype=tt

+		end

+	end

+	return advtrains.rotate_conn_by(nodedef.at_conns, noderot*AT_CMAX/4), (nodedef.at_rail_y or 0), tracktype

+end

+

+-- Function called when a track is about to be dug or modified by the trackworker

+-- Returns either true (ok) or false,"translated string describing reason why it isn't allowed"

+function advtrains.can_dig_or_modify_track(pos)

+	if advtrains.get_train_at_pos(pos) then

+		return false, attrans("Position is occupied by a train.")

+	end

+	-- interlocking: tcb, signal IP a.s.o.

+	if advtrains.interlocking then

+		-- TCB?

+		if advtrains.interlocking.db.get_tcb(pos) then

+			return false, attrans("There's a Track Circuit Break here.")

+		end

+		-- signal ip?

+		if advtrains.interlocking.db.is_ip_at(pos, true) then -- is_ip_at with purge parameter

+			return false, attrans("There's a Signal Influence Point here.")

+		end

+	end

+	return true

+end
\ No newline at end of file
diff --git a/advtrains/trainlogic.lua b/advtrains/trainlogic.lua
index 288e224..c6762c9 100644
--- a/advtrains/trainlogic.lua
+++ b/advtrains/trainlogic.lua
@@ -283,7 +283,7 @@ function advtrains.train_ensure_init(id, train)
 	assertdef(train, "id", id)
 	
 	
-	if not train.drives_on or not train.max_speed then
+	if not train.max_speed then
 		--atprint("in ensure_init: missing properties, updating!")
 		advtrains.update_trainpart_properties(id)
 	end
@@ -1034,10 +1034,9 @@ end
 
 -- Note: safe_decouple_wagon() has been moved to wagons.lua
 
--- this function sets wagon's pos_in_train(parts) properties and train's max_speed and drives_on (and more)
+-- this function sets wagon's pos_in_train(parts) properties and train's max_speed (and more)
 function advtrains.update_trainpart_properties(train_id, invert_flipstate)
 	local train=advtrains.trains[train_id]
-	train.drives_on=advtrains.merge_tables(advtrains.all_tracktypes)
 	--FIX: deep-copy the table!!!
 	train.max_speed=20
 	train.extent_h = 0;
@@ -1079,13 +1078,6 @@ function advtrains.update_trainpart_properties(train_id, invert_flipstate)
 			end
 			rel_pos=rel_pos+wagon.wagon_span
 			
-			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)
 			train.extent_h = math.max(train.extent_h, wagon.extent_h or 1);
 		end
diff --git a/advtrains/wagons.lua b/advtrains/wagons.lua
index b0fb575..f231546 100644
--- a/advtrains/wagons.lua
+++ b/advtrains/wagons.lua
@@ -1367,7 +1367,7 @@ function advtrains.register_wagon(sysname_p, prototype, desc, inv_img, nincreati
 				local node=minetest.get_node_or_nil(pointed_thing.under)
 				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, prototype.drives_on)) then
+				if(not advtrains.is_track(nodename)) then
 					atprint("no track here, not placing.")
 					return itemstack
 				end
@@ -1382,7 +1382,7 @@ function advtrains.register_wagon(sysname_p, prototype, desc, inv_img, nincreati
 				local yaw = placer:get_look_horizontal()
 				local plconnid = advtrains.yawToClosestConn(yaw, tconns)
 				
-				local prevpos = advtrains.get_adjacent_rail(pointed_thing.under, tconns, plconnid, prototype.drives_on)
+				local prevpos = advtrains.get_adjacent_rail(pointed_thing.under, tconns, plconnid)
 				if not prevpos then
 					minetest.chat_send_player(pname, "The track you are trying to place the wagon on is not long enough!")
 					return
@@ -1407,7 +1407,6 @@ advtrains.register_wagon("advtrains:wagon_placeholder", {
 	collisionbox = {-0.3,-0.3,-0.3, 0.3,0.3,0.3},
 	visual_size = {x=0.7, y=0.7},
 	initial_sprite_basepos = {x=0, y=0},
-	drives_on = advtrains.all_tracktypes,
 	max_speed = 5,
 	seats = {
 	},
diff --git a/advtrains_interlocking/init.lua b/advtrains_interlocking/init.lua
index a2f5882..cc46b83 100644
--- a/advtrains_interlocking/init.lua
+++ b/advtrains_interlocking/init.lua
@@ -24,7 +24,9 @@ dofile(modpath.."tool.lua")
 
 dofile(modpath.."approach.lua")
 dofile(modpath.."ars.lua")
-dofile(modpath.."tsr_rail.lua")
+
+--TODO reenable tsr rail
+--dofile(modpath.."tsr_rail.lua")
 
 
 minetest.register_privilege("interlocking", {description = "Can set up track sections, routes and signals.", give_to_singleplayer = true})
diff --git a/advtrains_line_automation/init.lua b/advtrains_line_automation/init.lua
index 7b758bc..cc8df3c 100644
--- a/advtrains_line_automation/init.lua
+++ b/advtrains_line_automation/init.lua
@@ -20,7 +20,9 @@ local modpath = minetest.get_modpath(minetest.get_current_modname()) .. DIR_DELI
 
 dofile(modpath.."railwaytime.lua")
 dofile(modpath.."scheduler.lua")
-dofile(modpath.."stoprail.lua")
+
+--TODO reenable stop rail
+--dofile(modpath.."stoprail.lua")
 
 
 function advtrains.lines.load(data)
diff --git a/advtrains_signals_ks/init.lua b/advtrains_signals_ks/init.lua
index bdbd50d..99d059a 100755
--- a/advtrains_signals_ks/init.lua
+++ b/advtrains_signals_ks/init.lua
@@ -113,15 +113,6 @@ local suppasp_ra = {
 		}
 }
 
-advtrains.trackplacer.register_tracktype("advtrains_signals_ks:hs")
-advtrains.trackplacer.register_tracktype("advtrains_signals_ks:ra")
-advtrains.trackplacer.register_tracktype("advtrains_signals_ks:sign")
-advtrains.trackplacer.register_tracktype("advtrains_signals_ks:sign_lf")
-advtrains.trackplacer.register_tracktype("advtrains_signals_ks:sign_lf7")
-advtrains.trackplacer.register_tracktype("advtrains_signals_ks:zs3")
-advtrains.trackplacer.register_tracktype("advtrains_signals_ks:zs3v")
-advtrains.trackplacer.register_tracktype("advtrains_signals_ks:mast")
-
 for _, rtab in ipairs({
 		{rot =  "0", sbox = {-1/8, -1/2, -1/2,  1/8, 1/2, -1/4}, ici=true},
 		{rot = "30", sbox = {-3/8, -1/2, -1/2, -1/8, 1/2, -1/4},},
@@ -201,7 +192,7 @@ for _, rtab in ipairs({
 			after_dig_node = advtrains.interlocking.signal_after_dig,
 		})
 		-- rotatable by trackworker
-		advtrains.trackplacer.add_worked("advtrains_signals_ks:hs", typ, "_"..rot)
+		--TODO add rotation using trackworker
 	end
 	
 	
@@ -246,7 +237,7 @@ for _, rtab in ipairs({
 			after_dig_node = advtrains.interlocking.signal_after_dig,
 		})
 		-- rotatable by trackworker
-		advtrains.trackplacer.add_worked("advtrains_signals_ks:ra", typ, "_"..rot)
+		--TODO add rotation using trackworker
 	end
 
 	-- Schilder:
@@ -283,7 +274,7 @@ for _, rtab in ipairs({
 			after_dig_node = advtrains.interlocking.signal_after_dig,
 		})
 		-- rotatable by trackworker
-		advtrains.trackplacer.add_worked("advtrains_signals_ks:"..prefix, typ, "_"..rot, nxt)
+		--TODO add rotation using trackworker
 	end
 
 	for typ, prts in pairs {
@@ -378,7 +369,7 @@ for _, rtab in ipairs({
 		t.drop = "advtrains_signals_ks:zs3_off_0"
 		t.selection_box.fixed[1][5] = 0
 		minetest.register_node("advtrains_signals_ks:zs3_"..typ.."_"..rot, t)
-		advtrains.trackplacer.add_worked("advtrains_signals_ks:zs3", typ, "_"..rot)
+		--TODO add rotation using trackworker
 
 		-- Zs 3v
 		local t = table.copy(def)
@@ -387,7 +378,7 @@ for _, rtab in ipairs({
 		t.drop = "advtrains_signals_ks:zs3v_off_0"
 		t.tiles[3] = t.tiles[3] .. "^[multiply:yellow"
 		minetest.register_node("advtrains_signals_ks:zs3v_"..typ.."_"..rot, t)
-		advtrains.trackplacer.add_worked("advtrains_signals_ks:zs3v", typ, "_"..rot)
+		--TODO add rotation using trackworker
 	end
 	
 	minetest.register_node("advtrains_signals_ks:mast_mast_"..rot, {
@@ -412,7 +403,7 @@ for _, rtab in ipairs({
 		},
 		drop = "advtrains_signals_ks:mast_mast_0",
 	})
-	advtrains.trackplacer.add_worked("advtrains_signals_ks:mast","mast", "_"..rot)
+	--TODO add rotation using trackworker
 end
 
 -- Crafting
diff --git a/advtrains_train_track/init.lua b/advtrains_train_track/init.lua
index 5065155..55b1367 100755
--- a/advtrains_train_track/init.lua
+++ b/advtrains_train_track/init.lua
@@ -1,937 +1,172 @@
--- Default tracks for advtrains
--- (c) orwell96 and contributors
-
-local default_boxen = {
-    ["st"] = {
-        [""] = {
-            selection_box = {
-                type = "fixed",
-                fixed = {-1/2-1/16, -1/2, -1/2, 1/2+1/16, -1/2+2/16, 1/2},
-            }
-        },
-        ["_30"] = {
-            selection_box = {
-                type = "fixed",
-                fixed = {
-                    {-0.5000, -0.5000, -1.000, 0.5000, -0.3750, 1.000},
-                    {-0.8750, -0.5000, -1.000, -0.5000, -0.3750, 0.2500},
-                    {0.5000, -0.5000, -0.2500, 0.8750, -0.3750, 1.000},
-                    {-0.1250, -0.5000, -1.375, 0.1875, -0.3750, -1.000}
-                }
-            }
-        },
-        ["_45"] = {
-            selection_box = {
-                type = "fixed",
-                fixed = {
-                    {-0.5000, -0.5000, -0.8750, 0.5000, -0.3750, 0.8750},
-                    {0.5000, -0.5000, -0.5000, 0.8750, -0.3750, 0.5000},
-                    {-0.8750, -0.5000, -0.5000, -0.5000, -0.3750, 0.5000}
-                }
-            }
-        },
-        ["_60"] = {
-            selection_box = {
-                type = "fixed",
-                fixed = {
-                    {-1.000, -0.5000, -0.5000, 1.000, -0.3750, 0.5000},
-                    {-1.000, -0.5000, -0.8750, 0.2500, -0.3750, -0.5000},
-                    {-0.2500, -0.5000, 0.5000, 1.000, -0.3750, 0.8750},
-                    {-1.375, -0.5000, -0.1250, -1.000, -0.3750, 0.1875}
-                }
-            }
-        },
-    },
-
-    ["cr"] = {
-        [""] = {
-            selection_box = {
-                type = "fixed",
-                fixed = {
-                    {-0.5000, -0.5000, -0.5000, 0.6875, -0.3750, 0.5000},
-                    {-0.3750, -0.5000, -1.000, 1.000, -0.3750, 0.000}
-                }
-            }
-        },
-        ["_30"] = {
-            selection_box = {
-                type = "fixed",
-                fixed = {
-                    {-0.5000, -0.5000, -0.5000, 0.7500, -0.3750, 0.8750},
-                    {-0.3750, -0.5000, 0.8750, 0.2500, -0.3750, 1.188},
-                    {0.7500, -0.5000, 0.2500, 1.063, -0.3750, 0.8750}
-                }
-            }
-        },
-        ["_45"] = {
-            selection_box = {
-                type = "fixed",
-                fixed = {
-                    {-0.5000, -0.5000, -1.125, 0.5000, -0.3750, 0.6875},
-                    {-0.8750, -0.5000, -0.9375, -0.5000, -0.3750, 0.06250},
-                    {0.5000, -0.5000, -0.5000, 0.8750, -0.3750, 0.5000}
-                }
-            }
-        },
-        ["_60"] = {
-            selection_box = {
-                type = "fixed",
-                fixed = {
-                    {-0.8125, -0.5000, -0.5000, 1.188, -0.3750, 0.5000},
-                    {-0.1875, -0.5000, 0.5000, 0.8750, -0.3125, 0.8750},
-                    {-0.2500, -0.5000, -0.9375, 0.3125, -0.3125, -0.5000}
-                }
-            }
-        },
-    },
-
-    ["swlst"] = {
-        [""] = {
-            selection_box = {
-                type = "fixed",
-                fixed = {
-                    {-0.5000, -0.5000, -0.5000, 0.6250, -0.3750, 0.5000},
-                    {-0.3125, -0.5000, -1.000, 0.9375, -0.3125, -0.06250}
-                }
-            }
-        },
-        ["_30"] = {
-            selection_box = {
-                type = "fixed",
-                fixed = {
-                    {-0.5000, -0.5000, -1.000, 0.5000, -0.3750, 1.000},
-                    {-0.8750, -0.5000, -1.000, -0.5000, -0.3750, 0.2500},
-                    {0.5000, -0.5000, -0.2500, 0.8750, -0.3750, 1.000},
-                    {-0.1250, -0.5000, -1.375, 0.1875, -0.3750, -1.000}
-                }
-            }
-        },
-        ["_45"] = {
-            selection_box = {
-                type = "fixed",
-                fixed = {
-                    {-0.5000, -0.5000, -1.1875, 0.5000, -0.3750, 0.8750},
-                    {0.5000, -0.5000, -0.5000, 0.8750, -0.3750, 0.5000},
-                    {-0.8750, -0.5000, -0.8125, -0.5000, -0.3750, 0.5000}
-                }
-            }
-        },
-        ["_60"] = {
-            selection_box = {
-                type = "fixed",
-                fixed = {
-                    {-1.000, -0.5000, -0.5000, 1.000, -0.3750, 0.5000},
-                    {-1.000, -0.5000, -0.8750, 0.2500, -0.3750, -0.5000},
-                    {-0.2500, -0.5000, 0.5000, 1.000, -0.3750, 0.8750},
-                    {-1.375, -0.5000, -0.1250, -1.000, -0.3750, 0.1875}
-                }
-            }
-        },
-    },
-
-    ["swrst"] = {
-        [""] = {
-            selection_box = {
-                type = "fixed",
-                fixed = {
-                    {-0.5000, -0.5000, -0.5000, 0.6250, -0.3750, 0.5000},
-                    {-0.8125, -0.5000, -1.000, 0.4375, -0.3125, -0.06250}
-                }
-            }
-        },
-        ["_30"] = {
-            selection_box = {
-                type = "fixed",
-                fixed = {
-                    {-0.5000, -0.5000, -1.000, 0.5000, -0.3750, 1.000},
-                    {-0.8750, -0.5000, -1.000, -0.5000, -0.3750, 0.2500},
-                    {0.5000, -0.5000, -0.2500, 0.8750, -0.3750, 1.000},
-                    {-0.1250, -0.5000, -1.375, 0.1875, -0.3750, -1.000}
-                }
-            }
-        },
-        ["_45"] = {
-            selection_box = {
-                type = "fixed",
-                fixed = {
-                    {-1.1875, -0.5000, -0.5000, 0.8750, -0.3750, 0.5000},
-                    {-0.5000, -0.5000, 0.5000, 0.5000, -0.3750, 0.8750},
-                    {-0.8125, -0.5000, -0.8750, 0.5000, -0.3750, -0.5000}
-                }
-            }
-        },
-        ["_60"] = {
-            selection_box = {
-                type = "fixed",
-                fixed = {
-                    {-1.000, -0.5000, -0.5000, 1.000, -0.3750, 0.5000},
-                    {-1.000, -0.5000, -0.8750, 0.2500, -0.3750, -0.5000},
-                    {-0.2500, -0.5000, 0.5000, 1.000, -0.3750, 0.8750},
-                    {-1.375, -0.5000, -0.1250, -1.000, -0.3750, 0.1875}
-                }
-            }
-        },
-    },
-}
-
-default_boxen["swlcr"] = default_boxen["swlst"]
-default_boxen["swrcr"] = default_boxen["swrst"]
-
---flat
-advtrains.register_tracks("default", {
-	nodename_prefix="advtrains:dtrack",
-	texture_prefix="advtrains_dtrack",
-	models_prefix="advtrains_dtrack",
-	models_suffix=".b3d",
-	shared_texture="advtrains_dtrack_shared.png",
-	description=attrans("Track"),
-	formats={},
-
-    get_additional_definiton = function(def, preset, suffix, rotation)
-        if default_boxen[suffix] ~= nil and default_boxen[suffix][rotation] ~= nil then
-            return default_boxen[suffix][rotation]
-        else
-            return {}
-        end
-    end,
-}, advtrains.ap.t_30deg_flat)
-
-minetest.register_craft({
-	output = 'advtrains:dtrack_placer 50',
-	recipe = {
-		{'default:steel_ingot', 'group:stick', 'default:steel_ingot'},
-		{'default:steel_ingot', 'group:stick', 'default:steel_ingot'},
-		{'default:steel_ingot', 'group:stick', 'default:steel_ingot'},
-	},
-})
-
-local y3_boxen = {
-    [""] = {
-        selection_box = {
-            type = "fixed",
-            fixed = {
-                {-0.8750, -0.5000, -1.125, 0.8750, -0.3750, 0.4375}
-            }
-        }
-    },
-
-    ["_30"] = {
-        selection_box = {
-            type = "fixed",
-            fixed = {
-                {-0.5000, -0.5000, -0.875, 0.5000, -0.3750, 1.000},
-                {-0.8750, -0.5000, -0.4375, -0.5000, -0.3750, 0.5625},
-                {0.5000, -0.5000, -0.2500, 0.8125, -0.3750, 1.000},
-            }
-        }
-    },
-
-    --UX FIXME: - 3way - have to place straight route before l and r or the 
-    --nodebox overlaps too much and can't place the straight track node.
-    ["_45"] = {
-        selection_box = {
-            type = "fixed",
-            fixed = {
-                {-0.5000, -0.5000, -1.1250, 0.5000, -0.3750, 0.8750},
-                {0.5000, -0.5000, -0.5000, 0.8750, -0.3750, 0.5000},
-                {-1.1250, -0.5000, -0.9375, -0.5000, -0.3750, 0.5000}
-            }
-        }
-    },
-
-    ["_60"] = {
-        selection_box = {
-            type = "fixed",
-            fixed = {
-                --{-0.5000, -0.5000, -0.875, 0.5000, -0.3750, 1.000},
-                {-0.875, -0.5000, -0.5, 1.0, -0.3750, 0.5},
-                --{-0.8750, -0.5000, -0.4375, -0.5000, -0.3750, 0.5625},
-                {-0.4375, -0.5000, -0.8750, 0.5625, -0.3750, -0.5000},
-                --{0.5000, -0.5000, -0.2500, 0.8125, -0.3750, 1.000},
-                {-0.2500, -0.5000, -0.2500, 1.0000, -0.3750, 0.8125},
-            }
-        }
-    },
-}
-
-
-local function y3_turnouts_addef(def, preset, suffix, rotation)
-    return y3_boxen[rotation] or {}
-end
--- y-turnout
-advtrains.register_tracks("default", {
-	nodename_prefix="advtrains:dtrack_sy",
-	texture_prefix="advtrains_dtrack_sy",
-	models_prefix="advtrains_dtrack_sy",
-	models_suffix=".obj",
-	shared_texture="advtrains_dtrack_shared.png",
-	description=attrans("Y-turnout"),
-	formats = {},
-    get_additional_definiton = y3_turnouts_addef,
-}, advtrains.ap.t_yturnout)
-minetest.register_craft({
-	output = 'advtrains:dtrack_sy_placer 2',
-	recipe = {
-		{'advtrains:dtrack_placer', '', 'advtrains:dtrack_placer'},
-		{'', 'advtrains:dtrack_placer', ''},
-		{'', 'advtrains:dtrack_placer', ''},
-	},
-})
---3-way turnout
-advtrains.register_tracks("default", {
-	nodename_prefix="advtrains:dtrack_s3",
-	texture_prefix="advtrains_dtrack_s3",
-	models_prefix="advtrains_dtrack_s3",
-	models_suffix=".obj",
-	shared_texture="advtrains_dtrack_shared.png",
-	description=attrans("3-way turnout"),
-	formats = {},
-    get_additional_definiton = y3_turnouts_addef,
-}, advtrains.ap.t_s3way)
-minetest.register_craft({
-	output = 'advtrains:dtrack_s3_placer 1',
-	recipe = {
-		{'advtrains:dtrack_placer', 'advtrains:dtrack_placer', 'advtrains:dtrack_placer'},
-		{'', 'advtrains:dtrack_placer', ''},
-		{'', '', ''},
-	},
-})
-
--- Diamond Crossings
-
-local perp_boxen = {
-    [""] = {}, --default size
-    ["_30"] = {
-        selection_box = {
-            type = "fixed",
-            fixed = {
-                {-1.000, -0.5000, -1.000, 1.000, -0.3750, 1.000}
-            }
-        }
-    },
-    ["_45"] = {
-        selection_box = {
-            type = "fixed",
-            fixed = {
-                {-0.8125, -0.5000, -0.8125, 0.8125, -0.3750, 0.8125}
-            }
-        }
-    },
-    ["_60"] = {
-        selection_box = {
-            type = "fixed",
-            fixed = {
-                {-1.000, -0.5000, -1.000, 1.000, -0.3750, 1.000}
-            }
-        }
-    },
-}
-
--- perpendicular
-advtrains.register_tracks("default", {
-	nodename_prefix="advtrains:dtrack_xing",
-	texture_prefix="advtrains_dtrack_xing",
-	models_prefix="advtrains_dtrack_xing",
-	models_suffix=".obj",
-	shared_texture="advtrains_dtrack_shared.png",
-	description=attrans("Perpendicular Diamond Crossing Track"),
-	formats = {},
-    get_additional_definiton = function(def, preset, suffix, rotation)
-        return perp_boxen[rotation] or {}
-    end
-}, advtrains.ap.t_perpcrossing)
-
-minetest.register_craft({
-	output = 'advtrains:dtrack_xing_placer 3',
-	recipe = {
-		{'', 'advtrains:dtrack_placer', ''},
-		{'advtrains:dtrack_placer', 'advtrains:dtrack_placer', 'advtrains:dtrack_placer'},
-		{'', 'advtrains:dtrack_placer', ''}
-	}
-})
-
-local ninety_plus_boxen = {
-    ["30l"] = {
-        selection_box = {
-            type = "fixed",
-            fixed = {
-                {-0.5000, -0.5000, -1.000, 0.5000, -0.3750, 1.000},
-                {-0.8750, -0.5000, -1.000, -0.5000, -0.3750, 0.2500},
-                {0.5000, -0.5000, -0.2500, 0.8750, -0.3750, 1.000},
-                {-0.1250, -0.5000, -1.375, 0.1875, -0.3750, -1.000}
-            }
-        }
-    },
-    ["30r"] = {
-        selection_box = {
-            type = "fixed",
-            fixed = {
-                {0.5000, -0.5000, -1.000, -0.5000, -0.3750, 1.000},
-                {0.8750, -0.5000, -1.000, 0.5000, -0.3750, 0.2500},
-                {-0.5000, -0.5000, -0.2500, -0.8750, -0.3750, 1.000},
-                {0.1250, -0.5000, -1.375, -0.1875, -0.3750, -1.000}
-            }
-        }
-    },
-    ["45l"] = {
-        selection_box = {
-            type = "fixed",
-            fixed = {
-                {-0.5000, -0.5000, -0.8750, 0.5000, -0.3750, 0.8750},
-                {0.5000, -0.5000, -0.5000, 0.8750, -0.3750, 0.5000},
-                {-0.8750, -0.5000, -0.5000, -0.5000, -0.3750, 0.5000}
-            }
-        }
-    },
-    ["45r"] = {
-        selection_box = {
-            type = "fixed",
-            fixed = {
-                {-0.5000, -0.5000, -0.8750, 0.5000, -0.3750, 0.8750},
-                {0.5000, -0.5000, -0.5000, 0.8750, -0.3750, 0.5000},
-                {-0.8750, -0.5000, -0.5000, -0.5000, -0.3750, 0.5000}
-            }
-        }
-    },
-    ["60l"] = {
-        selection_box = {
-            type = "fixed",
-            fixed = {
-                {-1.000, -0.5000, -0.5000, 1.000, -0.3750, 0.5000},
-                {-1.000, -0.5000, -0.8750, 0.2500, -0.3750, -0.5000},
-                {-0.2500, -0.5000, 0.5000, 1.000, -0.3750, 0.8750},
-                {-1.375, -0.5000, -0.1250, -1.000, -0.3750, 0.1875}
-            }
-        }
-    },
-    ["60r"] = {
-        selection_box = {
-            type = "fixed",
-            fixed = {
-                {1.000, -0.5000, -0.5000, -1.000, -0.3750, 0.5000},
-                {1.000, -0.5000, -0.8750, -0.2500, -0.3750, -0.5000},
-                {0.2500, -0.5000, 0.5000, -1.000, -0.3750, 0.8750},
-                {1.375, -0.5000, -0.1250, 1.000, -0.3750, 0.1875}
-            }
-        }
-    },
-}
-
--- 90plusx
--- When you face east and param2=0, then this set of rails has a rail at 90
--- degrees to the viewer, plus another rail crossing at 30, 45 or 60 degrees.
-advtrains.register_tracks("default", {
-	nodename_prefix="advtrains:dtrack_xing90plusx",
-	texture_prefix="advtrains_dtrack_xing4590",
-	models_prefix="advtrains_dtrack_xing90plusx",
-	models_suffix=".obj",
-	shared_texture="advtrains_dtrack_shared.png",
-	description=attrans("90+Angle Diamond Crossing Track"),
-	formats = {},
-    get_additional_definiton = function(def, preset, suffix, rotation)
-        return ninety_plus_boxen[suffix] or {}
-    end,
-}, advtrains.ap.t_90plusx_crossing)
-minetest.register_craft({
-	output = 'advtrains:dtrack_xing90plusx_placer 2',
-	recipe = {
-		{'advtrains:dtrack_placer', '', ''},
-		{'advtrains:dtrack_placer', 'advtrains:dtrack_placer', 'advtrains:dtrack_placer'},
-		{'', '', 'advtrains:dtrack_placer'}
-	}
-})
-
--- Deprecate any rails using the old name scheme
-minetest.register_lbm({
-	label = "Upgrade legacy 4590 rails",
-	name = "advtrains_train_track:replace_legacy_4590",
-	nodenames = {"advtrains:dtrack_xing4590_st"},
-	run_at_every_load = true,
-	action = function(pos, node)
-		minetest.log("actionPos!: " .. pos.x .. "," .. pos.y .. "," .. pos.z)
-		minetest.log("node!: " .. node.name .. "," .. node.param1 .. "," .. node.param2)
-		advtrains.ndb.swap_node(pos,
-		{
-			name="advtrains:dtrack_xing90plusx_45l",
-			param1=node.param1,
-			param2=node.param2,
-		})
-	end
-})
--- This will replace any items left in the inventory
-minetest.register_alias("advtrains:dtrack_xing4590_placer", "advtrains:dtrack_xing90plusx_placer")
-
-local diagonal_boxen = {
-    ["30r45l"] = {
-        selection_box = {
-            type = "fixed",
-            fixed = {
-                {0.5000, -0.5000, -1.000, -0.5000, -0.3750, 1.000},
-                {0.8750, -0.5000, -1.000, 0.5000, -0.3750, 0.2500},
-                {-0.5000, -0.5000, -0.2500, -0.8750, -0.3750, 1.000},
-                {0.1250, -0.5000, -1.375, -0.1875, -0.3750, -1.000}
-            }
-        }
-    },
-    ["60l30l"] = {
-        selection_box = {
-            type = "fixed",
-            fixed = {
-                {-1.000, -0.5000, -0.5000, 1.000, -0.3750, 0.5000},
-                {-1.000, -0.5000, -0.8750, 0.2500, -0.3750, -0.5000},
-                {-0.2500, -0.5000, 0.5000, 1.000, -0.3750, 0.8750},
-                {-1.375, -0.5000, -0.1250, -1.000, -0.3750, 0.1875}
-            }
-        }
-    },
-    ["60l60r"] = {
-        selection_box = {
-            type = "fixed",
-            fixed = {
-                {-1.000, -0.5000, -1.000, 1.000, -0.3750, 1.000}
-            }
-        }
-    },
-    ["60r30r"] = {
-        selection_box = {
-            type = "fixed",
-            fixed = {
-                {1.000, -0.5000, -0.5000, -1.000, -0.3750, 0.5000},
-                {1.000, -0.5000, -0.8750, -0.2500, -0.3750, -0.5000},
-                {0.2500, -0.5000, 0.5000, -1.000, -0.3750, 0.8750},
-                {1.375, -0.5000, -0.1250, 1.000, -0.3750, 0.1875}
-            }
-        }
-    },
-    ["30l45r"] = {
-        selection_box = {
-            type = "fixed",
-            fixed = {
-                {-0.5000, -0.5000, -1.000, 0.5000, -0.3750, 1.000},
-                {-0.8750, -0.5000, -1.000, -0.5000, -0.3750, 0.2500},
-                {0.5000, -0.5000, -0.2500, 0.8750, -0.3750, 1.000},
-                {-0.1250, -0.5000, -1.375, 0.1875, -0.3750, -1.000}
-            }
-        }
-    },
-    ["60l45r"] = {
-        selection_box = {
-            type = "fixed",
-            fixed = {
-                {-1.000, -0.5000, -0.5000, 1.000, -0.3750, 0.5000},
-                {-1.000, -0.5000, -0.8750, 0.2500, -0.3750, -0.5000},
-                {-0.2500, -0.5000, 0.5000, 1.000, -0.3750, 0.8750},
-                {-1.375, -0.5000, -0.1250, -1.000, -0.3750, 0.1875}
-            }
-        }
-    },
-    ["60r45l"] = {
-        selection_box = {
-            type = "fixed",
-            fixed = {
-                {1.000, -0.5000, -0.5000, -1.000, -0.3750, 0.5000},
-                {1.000, -0.5000, -0.8750, -0.2500, -0.3750, -0.5000},
-                {0.2500, -0.5000, 0.5000, -1.000, -0.3750, 0.8750},
-                {1.375, -0.5000, -0.1250, 1.000, -0.3750, 0.1875}
-            }
-        }
-    },
-}
-
--- Diagonal
--- This set of rail crossings is named based on the angle of each intersecting
--- direction when facing east and param2=0. Rails with l/r swapped are mirror
--- images. For example, 30r45l is the mirror image of 30l45r.
-advtrains.register_tracks("default", {
-	nodename_prefix="advtrains:dtrack_xingdiag",
-	texture_prefix="advtrains_dtrack_xingdiag",
-	models_prefix="advtrains_dtrack_xingdiag",
-	models_suffix=".obj",
-	shared_texture="advtrains_dtrack_shared.png",
-	description=attrans("Diagonal Diamond Crossing Track"),
-	formats = {},
-    get_additional_definiton = function(def, preset, suffix, rotation)
-        return diagonal_boxen[suffix] or {}
-    end,
-}, advtrains.ap.t_diagonalcrossing)
-minetest.register_craft({
-	output = 'advtrains:dtrack_xingdiag_placer 2',
-	recipe = {
-		{'advtrains:dtrack_placer', '', 'advtrains:dtrack_placer'},
-		{'', 'advtrains:dtrack_placer', ''},
-		{'advtrains:dtrack_placer', '', 'advtrains:dtrack_placer'}
-	}
-})
----- Not included: very shallow crossings like (30/60)+45.
----- At an angle of only 18.4 degrees, the models would not
----- translate well to a block game.
--- END crossings
-
---slopes
-advtrains.register_tracks("default", {
-	nodename_prefix="advtrains:dtrack",
-	texture_prefix="advtrains_dtrack",
-	models_prefix="advtrains_dtrack",
-	models_suffix=".obj",
-	shared_texture="advtrains_dtrack_shared.png",
-	second_texture="default_gravel.png",
-	description=attrans("Track"),
-	formats={vst1={true, false, true}, vst2={true, false, true}, vst31={true}, vst32={true}, vst33={true}},
-}, advtrains.ap.t_30deg_slope)
-
-minetest.register_craft({
-	type = "shapeless",
-	output = 'advtrains:dtrack_slopeplacer 2',
-	recipe = {
-		"advtrains:dtrack_placer",
-		"advtrains:dtrack_placer",
-		"default:gravel",
-	},
-})
-
-
---bumpers
-advtrains.register_tracks("default", {
-	nodename_prefix="advtrains:dtrack_bumper",
-	texture_prefix="advtrains_dtrack_bumper",
-	models_prefix="advtrains_dtrack_bumper",
-	models_suffix=".b3d",
-	shared_texture="advtrains_dtrack_rail.png",
-	--bumpers still use the old texture until the models are redone.
-	description=attrans("Bumper"),
-	formats={},
-}, advtrains.ap.t_30deg_straightonly)
-minetest.register_craft({
-	output = 'advtrains:dtrack_bumper_placer 2',
-	recipe = {
-		{'group:wood', 'dye:red'},
-		{'default:steel_ingot', 'default:steel_ingot'},
-		{'advtrains:dtrack_placer', 'advtrains:dtrack_placer'},
-	},
-})
---legacy bumpers
-for _,rot in ipairs({"", "_30", "_45", "_60"}) do
-	minetest.register_alias("advtrains:dtrack_bumper"..rot, "advtrains:dtrack_bumper_st"..rot)
-end
--- atc track
-advtrains.register_tracks("default", {
-	nodename_prefix="advtrains:dtrack_atc",
-	texture_prefix="advtrains_dtrack_atc",
-	models_prefix="advtrains_dtrack",
-	models_suffix=".b3d",
-	shared_texture="advtrains_dtrack_shared_atc.png",
-	description=attrans("ATC controller"),
-	formats={},
-	get_additional_definiton = advtrains.atc_function
-}, advtrains.trackpresets.t_30deg_straightonly)
-
-
--- Tracks for loading and unloading trains
--- Copyright (C) 2017 Gabriel Pérez-Cerezo <gabriel@gpcf.eu>
-
-local function get_far_node(pos)
-	local node = minetest.get_node(pos)
-	if node.name == "ignore" then
-		minetest.get_voxel_manip():read_from_map(pos, pos)
-		node = minetest.get_node(pos)
-	end
-	return node
-end
-
-
-local function show_fc_formspec(pos,player)
-	local pname = player:get_player_name()
-	if minetest.is_protected(pos,pname) then
-		minetest.chat_send_player(pname, "Position is protected!")
-		return
-	end
-	
-	local meta = minetest.get_meta(pos)
-	local fc = meta:get_string("fc") or ""
-	
-	local form = 'formspec_version[4]'..
-		'size[10,5]'..
-		'label[0.5,0.4;Advtrains Loading/Unloading Track]'..
-		'label[0.5,1.1;Set the code to match against the wagon\'s freight code]'..
-		'label[0.5,1.6;A blank field matches all wagons (default)]'..
-		'label[0.5,2.1;Use code # to disable the track section]'..
-		'field[0.5,3;5.5,1;fc;FC;'..minetest.formspec_escape(fc)..']'..
-		'button[6.5,3;3,1;save;Submit]'
-	minetest.show_formspec(pname, "at_load_unload_"..advtrains.encode_pos(pos), form)
-end
-
-minetest.register_on_player_receive_fields(function(player, formname, fields)
-	local pname = player:get_player_name()
-	local pe = string.match(formname, "^at_load_unload_(............)$")
-	local pos = advtrains.decode_pos(pe)
-	if pos then
-		if minetest.is_protected(pos, pname) then
-			minetest.chat_send_player(pname, "Position is protected!")
-			return
-		end
-		
-		if fields.save then
-			minetest.get_meta(pos):set_string("fc",tostring(fields.fc))
-			minetest.chat_send_player(pname,"Freight code set: "..tostring(fields.fc))
-			show_fc_formspec(pos,player)
-		end
-	end
-end)
-
-
-local function train_load(pos, train_id, unload)
-	local train=advtrains.trains[train_id]
-	local below = get_far_node({x=pos.x, y=pos.y-1, z=pos.z})
-	if not string.match(below.name, "chest") then
-		atprint("this is not a chest! at "..minetest.pos_to_string(pos))
-		return
-	end
-	
-	local node_fc = minetest.get_meta(pos):get_string("fc") or ""
-	if node_fc == "#" then
-		--track section is disabled
-		return
-	end
-	
-	local inv = minetest.get_inventory({type="node", pos={x=pos.x, y=pos.y-1, z=pos.z}})
-	if inv and train.velocity < 2 then
-		for k, v in ipairs(train.trainparts) do
-			local i=minetest.get_inventory({type="detached", name="advtrains_wgn_"..v})
-			if i and i:get_list("box") then
-			
-				local wagon_data = advtrains.wagons[v]
-				local wagon_fc
-				if wagon_data.fc then
-					if not wagon_data.fcind then wagon_data.fcind = 1 end
-					wagon_fc = tostring(wagon_data.fc[wagon_data.fcind]) or ""
-				end
-				
-				if node_fc == "" or wagon_fc == node_fc then
-					if not unload then
-						for _, item in ipairs(inv:get_list("main")) do
-							if i:get_list("box") and i:room_for_item("box", item)  then
-								i:add_item("box", item)
-								inv:remove_item("main", item)
-							end
-						end
-					else
-						for _, item in ipairs(i:get_list("box")) do
-							if inv:get_list("main") and inv:room_for_item("main", item)  then
-								i:remove_item("box", item)
-								inv:add_item("main", item)
-							end
-						end
-					end
-				end
-			end
-		end
-	end
-end
-
-
-
-advtrains.register_tracks("default", {
-	nodename_prefix="advtrains:dtrack_unload",
-	texture_prefix="advtrains_dtrack_unload",
-	models_prefix="advtrains_dtrack",
-	models_suffix=".b3d",
-	shared_texture="advtrains_dtrack_shared_unload.png",
-	description=attrans("Unloading Track"),
-	formats={},
-	get_additional_definiton = function(def, preset, suffix, rotation)
-		return {
-			after_dig_node=function(pos)
-				advtrains.invalidate_all_paths()
-				advtrains.ndb.clear(pos)
-			end,
-			on_rightclick = function(pos, node, player)
-				show_fc_formspec(pos, player)
-			end,
-			advtrains = {
-				on_train_enter = function(pos, train_id)
-					train_load(pos, train_id, true)
-				end,
-			},
-		}
-	end
-				     }, advtrains.trackpresets.t_30deg_straightonly)
-advtrains.register_tracks("default", {
-	nodename_prefix="advtrains:dtrack_load",
-	texture_prefix="advtrains_dtrack_load",
-	models_prefix="advtrains_dtrack",
-	models_suffix=".b3d",
-	shared_texture="advtrains_dtrack_shared_load.png",
-	description=attrans("Loading Track"),
-	formats={},
-	get_additional_definiton = function(def, preset, suffix, rotation)
-		return {
-			after_dig_node=function(pos)
-				advtrains.invalidate_all_paths()
-				advtrains.ndb.clear(pos)
-			end,
-			on_rightclick = function(pos, node, player)
-				show_fc_formspec(pos, player)
-			end,
-			advtrains = {
-				on_train_enter = function(pos, train_id)
-					train_load(pos, train_id, false)
-				end,
-			},
-		}
-	end
-				     }, advtrains.trackpresets.t_30deg_straightonly)
-
--- mod-dependent crafts
-local loader_core = "default:mese_crystal"  --fallback
-if minetest.get_modpath("basic_materials") then
-	loader_core = "basic_materials:ic"
-elseif minetest.get_modpath("technic") then
-	loader_core = "technic:control_logic_unit"
-end
---print("Loader Core: "..loader_core)
-
-minetest.register_craft({
-	type="shapeless",
-	output = 'advtrains:dtrack_load_placer',
-	recipe = {
-		"advtrains:dtrack_placer",
-		loader_core,
-		"default:chest"
-	},
-})
-loader_core = nil --nil the crafting variable
-
---craft between load/unload tracks
-minetest.register_craft({
-	type="shapeless",
-	output = 'advtrains:dtrack_unload_placer',
-	recipe = {
-		"advtrains:dtrack_load_placer",
-	},
-})
-minetest.register_craft({
-	type="shapeless",
-	output = 'advtrains:dtrack_load_placer',
-	recipe = {
-		"advtrains:dtrack_unload_placer",
-	},
-})
-
-
-if mesecon then
-	advtrains.register_tracks("default", {
-		nodename_prefix="advtrains:dtrack_detector_off",
-		texture_prefix="advtrains_dtrack_detector",
-		models_prefix="advtrains_dtrack",
-		models_suffix=".b3d",
-		shared_texture="advtrains_dtrack_shared_detector_off.png",
-		description=attrans("Detector Rail"),
-		formats={},
-		get_additional_definiton = function(def, preset, suffix, rotation)
-			return {
-				mesecons = {
-					receptor = {
-						state = mesecon.state.off,
-						rules = advtrains.meseconrules
-					}
-				},
-				advtrains = {
-					on_updated_from_nodedb = function(pos, node)
-						mesecon.receptor_off(pos, advtrains.meseconrules)
-					end,
-					on_train_enter=function(pos, train_id)
-						advtrains.ndb.swap_node(pos, {name="advtrains:dtrack_detector_on".."_"..suffix..rotation, param2=advtrains.ndb.get_node(pos).param2})
-						if advtrains.is_node_loaded(pos) then
-							mesecon.receptor_on(pos, advtrains.meseconrules)
-						end
-					end
-				}
-			}
-		end
-	}, advtrains.ap.t_30deg_straightonly)
-	advtrains.register_tracks("default", {
-		nodename_prefix="advtrains:dtrack_detector_on",
-		texture_prefix="advtrains_dtrack",
-		models_prefix="advtrains_dtrack",
-		models_suffix=".b3d",
-		shared_texture="advtrains_dtrack_shared_detector_on.png",
-		description="Detector(on)(you hacker you)",
-		formats={},
-		get_additional_definiton = function(def, preset, suffix, rotation)
-			return {
-				mesecons = {
-					receptor = {
-						state = mesecon.state.on,
-						rules = advtrains.meseconrules
-					}
-				},
-				advtrains = {
-					on_updated_from_nodedb = function(pos, node)
-						mesecon.receptor_on(pos, advtrains.meseconrules)
-					end,
-					on_train_leave=function(pos, train_id)
-						advtrains.ndb.swap_node(pos, {name="advtrains:dtrack_detector_off".."_"..suffix..rotation, param2=advtrains.ndb.get_node(pos).param2})
-						if advtrains.is_node_loaded(pos) then
-							mesecon.receptor_off(pos, advtrains.meseconrules)
-						end
-					end
-				}
-			}
-		end
-	}, advtrains.ap.t_30deg_straightonly_noplacer)
-minetest.register_craft({
-	type="shapeless",
-	output = 'advtrains:dtrack_detector_off_placer',
-	recipe = {
-		"advtrains:dtrack_placer",
-		"mesecons:wire_00000000_off"
-	},
-})
-end
---TODO legacy
---I know lbms are better for this purpose
-for name,rep in pairs({swl_st="swlst", swr_st="swrst", swl_cr="swlcr", swr_cr="swrcr", }) do
-	minetest.register_abm({
-    --  In the following two fields, also group:groupname will work.
-        nodenames = {"advtrains:track_"..name},
-       interval = 1.0, -- Operation interval in seconds
-       chance = 1, -- Chance of trigger per-node per-interval is 1.0 / this
-       action = function(pos, node, active_object_count, active_object_count_wider) minetest.set_node(pos, {name="advtrains:track_"..rep, param2=node.param2}) end,
-    })
-    minetest.register_abm({
-    --  In the following two fields, also group:groupname will work.
-        nodenames = {"advtrains:track_"..name.."_45"},
-       interval = 1.0, -- Operation interval in seconds
-       chance = 1, -- Chance of trigger per-node per-interval is 1.0 / this
-       action = function(pos, node, active_object_count, active_object_count_wider) minetest.set_node(pos, {name="advtrains:track_"..rep.."_45", param2=node.param2}) end,
-    })
-end
-
-if advtrains.register_replacement_lbms then
-minetest.register_lbm({
-	name = "advtrains:ramp_replacement_1",
---  In the following two fields, also group:groupname will work.
-	nodenames = {"advtrains:track_vert1"},
-	action = function(pos, node, active_object_count, active_object_count_wider) minetest.set_node(pos, {name="advtrains:dtrack_vst1", param2=(node.param2+2)%4}) end,
-})
-minetest.register_lbm({
-	name = "advtrains:ramp_replacement_1",
---  --  In the following two fields, also group:groupname will work.
-	nodenames = {"advtrains:track_vert2"},
-	action = function(pos, node, active_object_count, active_object_count_wider) minetest.set_node(pos, {name="advtrains:dtrack_vst2", param2=(node.param2+2)%4}) end,
-})
-	minetest.register_abm({
-		name = "advtrains:st_rep_1",
-	--  In the following two fields, also group:groupname will work.
-		nodenames = {"advtrains:track_st"},
-		interval=1,
-		chance=1,
-		action = function(pos, node, active_object_count, active_object_count_wider) minetest.set_node(pos, {name="advtrains:dtrack_st", param2=node.param2}) end,
-	})
-	minetest.register_lbm({
-		name = "advtrains:st_rep_1",
-	--  --  In the following two fields, also group:groupname will work.
-		nodenames = {"advtrains:track_st_45"},
-		action = function(pos, node, active_object_count, active_object_count_wider) minetest.set_node(pos, {name="advtrains:dtrack_st_45", param2=node.param2}) end,
-	})
-end
+-- advtrains_train_track

+-- rewritten to work with advtrains 2.5 track system

+

+local function conns(c1, c2, r1, r2) return {{c=c1, y=r1}, {c=c2, y=r2}} end

+local function conns3(c1, c2, c3, r1, r2, r3) return {{c=c1, y=r1}, {c=c2, y=r2}, {c=c3, y=r3}} end

+

+

+local common_def = {

+	drawtype = "mesh",

+	paramtype = "light",

+	paramtype2 = "facedir",

+	walkable = false,

+	selection_box = {

+		type = "fixed",

+		fixed = {-1/2-1/16, -1/2, -1/2, 1/2+1/16, -1/2+2/16, 1/2},

+	},

+

+	mesh_suffix = ".b3d",

+	tiles = { "advtrains_dtrack_shared.png" },

+	

+	groups = {

+		advtrains_track=1,

+		advtrains_track_default=1,

+		dig_immediate=2,

+		--not_in_creative_inventory=1,

+	},

+		

+	can_dig = advtrains.track_can_dig_callback,

+	after_dig_node = advtrains.track_update_callback,

+	after_place_node = advtrains.track_update_callback,

+	

+	drop = "advtrains:dtrack_placer"

+}

+

+-- Normal tracks, straight and curved

+advtrains.register_node_4rot("advtrains:dtrack_st",

+	advtrains.merge_tables(common_def, {

+		description=attrans("Track Straight"),

+		mesh_prefix="advtrains_dtrack_st",

+		at_conns = conns(0,8),

+		advtrains = {

+			trackworker_next_var = "advtrains:dtrack_cr",

+			track_place_group = "advtrains:dtrack",

+			track_place_single = true,

+		},

+	})

+)

+

+advtrains.register_node_4rot("advtrains:dtrack_cr",

+	advtrains.merge_tables(common_def, {

+		description=attrans("Track Curve"),

+		mesh_prefix="advtrains_dtrack_cr",

+		at_conns = conns(0,7),

+		advtrains = {

+			trackworker_next_var = "advtrains:dtrack_swlst",

+			track_place_group = "advtrains:dtrack",

+		},

+	})

+)

+

+-- simple turnouts left and right

+

+local stm_left = {

+	st = "advtrains:dtrack_swlst",

+	cr = "advtrains:dtrack_swlcr",

+}

+

+advtrains.register_node_4rot("advtrains:dtrack_swlst",

+	advtrains.merge_tables(common_def, {

+		description=attrans("Track Turnout Left Straight"),

+		mesh_prefix="advtrains_dtrack_swlst",

+		at_conns = conns3(0,8,7),

+		at_conn_map = {2,1,1},

+		on_rightclick = advtrains.state_node_on_rightclick_callback,

+		advtrains = {

+			node_state = "st",

+			node_next_state = "cr",

+			node_state_map = stm_left,

+			trackworker_next_var = "advtrains:dtrack_swrst"

+		},

+	})

+)

+

+advtrains.register_node_4rot("advtrains:dtrack_swlcr",

+	advtrains.merge_tables(common_def, {

+		description=attrans("Track Turnout Left Curve"),

+		mesh_prefix="advtrains_dtrack_swlcr",

+		at_conns = conns3(0,8,7), -- note: conns must stay identical

+		at_conn_map = {3,1,1}, -- now points to curve branch

+		on_rightclick = advtrains.state_node_on_rightclick_callback,

+		advtrains = {

+			node_state = "cr",

+			node_next_state = "st",

+			node_state_map = stm_left,

+			trackworker_next_var = "advtrains:dtrack_swrcr"

+		},

+	})

+)

+

+local stm_right = {

+	st = "advtrains:dtrack_swrst",

+	cr = "advtrains:dtrack_swrcr",

+}

+

+advtrains.register_node_4rot("advtrains:dtrack_swrst",

+	advtrains.merge_tables(common_def, {

+		description=attrans("Track Turnout Right Straight"),

+		mesh_prefix="advtrains_dtrack_swrst",

+		at_conns = conns3(0,8,9),

+		at_conn_map = {2,1,1},

+		on_rightclick = advtrains.state_node_on_rightclick_callback,

+		advtrains = {

+			node_state = "st",

+			node_next_state = "cr",

+			node_state_map = stm_right,

+			trackworker_next_var = "advtrains:dtrack_st"

+		},

+	})

+)

+

+advtrains.register_node_4rot("advtrains:dtrack_swrcr",

+	advtrains.merge_tables(common_def, {

+		description=attrans("Track Turnout Right Curve"),

+		mesh_prefix="advtrains_dtrack_swrcr",

+		at_conns = conns3(0,8,9), -- note: conns must stay identical

+		at_conn_map = {3,1,1}, -- now points to curve branch

+		on_rightclick = advtrains.state_node_on_rightclick_callback,

+		advtrains = {

+			node_state = "cr",

+			node_next_state = "st",

+			node_state_map = stm_right,

+			trackworker_next_var = "advtrains:dtrack_st"

+		},

+	})

+)

+

+-- register placer item

+minetest.register_craftitem(":advtrains:dtrack_placer", {

+	description = attrans("Track"),

+	inventory_image = "advtrains_dtrack_placer.png",

+	wield_image = "advtrains_dtrack_placer.png",

+	groups={advtrains_trackplacer=1, digtron_on_place=1},

+	liquids_pointable = false,

+	on_place = function(itemstack, placer, pointed_thing)

+			local name = placer:get_player_name()

+			if not name then

+			   return itemstack, false

+			end

+			if pointed_thing.type=="node" then

+				local pos=pointed_thing.above

+				local upos=vector.subtract(pointed_thing.above, {x=0, y=1, z=0})

+				if not advtrains.check_track_protection(pos, name) then

+					return itemstack, false

+				end

+				if minetest.registered_nodes[minetest.get_node(pos).name] and minetest.registered_nodes[minetest.get_node(pos).name].buildable_to then

+					local s = minetest.registered_nodes[minetest.get_node(upos).name] and minetest.registered_nodes[minetest.get_node(upos).name].walkable

+					if s then

+--						minetest.chat_send_all(nnprefix)

+						local yaw = placer:get_look_horizontal()

+						advtrains.trackplacer.place_track(pos, "advtrains:dtrack", name, yaw)

+						if not advtrains.is_creative(name) then

+							itemstack:take_item()

+						end

+					end

+				end

+			end

+			return itemstack, true

+	end,

+})

+

+

+--TODO restore mesecons!
\ No newline at end of file
diff --git a/advtrains_train_track/oldinit.lua b/advtrains_train_track/oldinit.lua
new file mode 100644
index 0000000..5065155
--- /dev/null
+++ b/advtrains_train_track/oldinit.lua
@@ -0,0 +1,937 @@
+-- Default tracks for advtrains
+-- (c) orwell96 and contributors
+
+local default_boxen = {
+    ["st"] = {
+        [""] = {
+            selection_box = {
+                type = "fixed",
+                fixed = {-1/2-1/16, -1/2, -1/2, 1/2+1/16, -1/2+2/16, 1/2},
+            }
+        },
+        ["_30"] = {
+            selection_box = {
+                type = "fixed",
+                fixed = {
+                    {-0.5000, -0.5000, -1.000, 0.5000, -0.3750, 1.000},
+                    {-0.8750, -0.5000, -1.000, -0.5000, -0.3750, 0.2500},
+                    {0.5000, -0.5000, -0.2500, 0.8750, -0.3750, 1.000},
+                    {-0.1250, -0.5000, -1.375, 0.1875, -0.3750, -1.000}
+                }
+            }
+        },
+        ["_45"] = {
+            selection_box = {
+                type = "fixed",
+                fixed = {
+                    {-0.5000, -0.5000, -0.8750, 0.5000, -0.3750, 0.8750},
+                    {0.5000, -0.5000, -0.5000, 0.8750, -0.3750, 0.5000},
+                    {-0.8750, -0.5000, -0.5000, -0.5000, -0.3750, 0.5000}
+                }
+            }
+        },
+        ["_60"] = {
+            selection_box = {
+                type = "fixed",
+                fixed = {
+                    {-1.000, -0.5000, -0.5000, 1.000, -0.3750, 0.5000},
+                    {-1.000, -0.5000, -0.8750, 0.2500, -0.3750, -0.5000},
+                    {-0.2500, -0.5000, 0.5000, 1.000, -0.3750, 0.8750},
+                    {-1.375, -0.5000, -0.1250, -1.000, -0.3750, 0.1875}
+                }
+            }
+        },
+    },
+
+    ["cr"] = {
+        [""] = {
+            selection_box = {
+                type = "fixed",
+                fixed = {
+                    {-0.5000, -0.5000, -0.5000, 0.6875, -0.3750, 0.5000},
+                    {-0.3750, -0.5000, -1.000, 1.000, -0.3750, 0.000}
+                }
+            }
+        },
+        ["_30"] = {
+            selection_box = {
+                type = "fixed",
+                fixed = {
+                    {-0.5000, -0.5000, -0.5000, 0.7500, -0.3750, 0.8750},
+                    {-0.3750, -0.5000, 0.8750, 0.2500, -0.3750, 1.188},
+                    {0.7500, -0.5000, 0.2500, 1.063, -0.3750, 0.8750}
+                }
+            }
+        },
+        ["_45"] = {
+            selection_box = {
+                type = "fixed",
+                fixed = {
+                    {-0.5000, -0.5000, -1.125, 0.5000, -0.3750, 0.6875},
+                    {-0.8750, -0.5000, -0.9375, -0.5000, -0.3750, 0.06250},
+                    {0.5000, -0.5000, -0.5000, 0.8750, -0.3750, 0.5000}
+                }
+            }
+        },
+        ["_60"] = {
+            selection_box = {
+                type = "fixed",
+                fixed = {
+                    {-0.8125, -0.5000, -0.5000, 1.188, -0.3750, 0.5000},
+                    {-0.1875, -0.5000, 0.5000, 0.8750, -0.3125, 0.8750},
+                    {-0.2500, -0.5000, -0.9375, 0.3125, -0.3125, -0.5000}
+                }
+            }
+        },
+    },
+
+    ["swlst"] = {
+        [""] = {
+            selection_box = {
+                type = "fixed",
+                fixed = {
+                    {-0.5000, -0.5000, -0.5000, 0.6250, -0.3750, 0.5000},
+                    {-0.3125, -0.5000, -1.000, 0.9375, -0.3125, -0.06250}
+                }
+            }
+        },
+        ["_30"] = {
+            selection_box = {
+                type = "fixed",
+                fixed = {
+                    {-0.5000, -0.5000, -1.000, 0.5000, -0.3750, 1.000},
+                    {-0.8750, -0.5000, -1.000, -0.5000, -0.3750, 0.2500},
+                    {0.5000, -0.5000, -0.2500, 0.8750, -0.3750, 1.000},
+                    {-0.1250, -0.5000, -1.375, 0.1875, -0.3750, -1.000}
+                }
+            }
+        },
+        ["_45"] = {
+            selection_box = {
+                type = "fixed",
+                fixed = {
+                    {-0.5000, -0.5000, -1.1875, 0.5000, -0.3750, 0.8750},
+                    {0.5000, -0.5000, -0.5000, 0.8750, -0.3750, 0.5000},
+                    {-0.8750, -0.5000, -0.8125, -0.5000, -0.3750, 0.5000}
+                }
+            }
+        },
+        ["_60"] = {
+            selection_box = {
+                type = "fixed",
+                fixed = {
+                    {-1.000, -0.5000, -0.5000, 1.000, -0.3750, 0.5000},
+                    {-1.000, -0.5000, -0.8750, 0.2500, -0.3750, -0.5000},
+                    {-0.2500, -0.5000, 0.5000, 1.000, -0.3750, 0.8750},
+                    {-1.375, -0.5000, -0.1250, -1.000, -0.3750, 0.1875}
+                }
+            }
+        },
+    },
+
+    ["swrst"] = {
+        [""] = {
+            selection_box = {
+                type = "fixed",
+                fixed = {
+                    {-0.5000, -0.5000, -0.5000, 0.6250, -0.3750, 0.5000},
+                    {-0.8125, -0.5000, -1.000, 0.4375, -0.3125, -0.06250}
+                }
+            }
+        },
+        ["_30"] = {
+            selection_box = {
+                type = "fixed",
+                fixed = {
+                    {-0.5000, -0.5000, -1.000, 0.5000, -0.3750, 1.000},
+                    {-0.8750, -0.5000, -1.000, -0.5000, -0.3750, 0.2500},
+                    {0.5000, -0.5000, -0.2500, 0.8750, -0.3750, 1.000},
+                    {-0.1250, -0.5000, -1.375, 0.1875, -0.3750, -1.000}
+                }
+            }
+        },
+        ["_45"] = {
+            selection_box = {
+                type = "fixed",
+                fixed = {
+                    {-1.1875, -0.5000, -0.5000, 0.8750, -0.3750, 0.5000},
+                    {-0.5000, -0.5000, 0.5000, 0.5000, -0.3750, 0.8750},
+                    {-0.8125, -0.5000, -0.8750, 0.5000, -0.3750, -0.5000}
+                }
+            }
+        },
+        ["_60"] = {
+            selection_box = {
+                type = "fixed",
+                fixed = {
+                    {-1.000, -0.5000, -0.5000, 1.000, -0.3750, 0.5000},
+                    {-1.000, -0.5000, -0.8750, 0.2500, -0.3750, -0.5000},
+                    {-0.2500, -0.5000, 0.5000, 1.000, -0.3750, 0.8750},
+                    {-1.375, -0.5000, -0.1250, -1.000, -0.3750, 0.1875}
+                }
+            }
+        },
+    },
+}
+
+default_boxen["swlcr"] = default_boxen["swlst"]
+default_boxen["swrcr"] = default_boxen["swrst"]
+
+--flat
+advtrains.register_tracks("default", {
+	nodename_prefix="advtrains:dtrack",
+	texture_prefix="advtrains_dtrack",
+	models_prefix="advtrains_dtrack",
+	models_suffix=".b3d",
+	shared_texture="advtrains_dtrack_shared.png",
+	description=attrans("Track"),
+	formats={},
+
+    get_additional_definiton = function(def, preset, suffix, rotation)
+        if default_boxen[suffix] ~= nil and default_boxen[suffix][rotation] ~= nil then
+            return default_boxen[suffix][rotation]
+        else
+            return {}
+        end
+    end,
+}, advtrains.ap.t_30deg_flat)
+
+minetest.register_craft({
+	output = 'advtrains:dtrack_placer 50',
+	recipe = {
+		{'default:steel_ingot', 'group:stick', 'default:steel_ingot'},
+		{'default:steel_ingot', 'group:stick', 'default:steel_ingot'},
+		{'default:steel_ingot', 'group:stick', 'default:steel_ingot'},
+	},
+})
+
+local y3_boxen = {
+    [""] = {
+        selection_box = {
+            type = "fixed",
+            fixed = {
+                {-0.8750, -0.5000, -1.125, 0.8750, -0.3750, 0.4375}
+            }
+        }
+    },
+
+    ["_30"] = {
+        selection_box = {
+            type = "fixed",
+            fixed = {
+                {-0.5000, -0.5000, -0.875, 0.5000, -0.3750, 1.000},
+                {-0.8750, -0.5000, -0.4375, -0.5000, -0.3750, 0.5625},
+                {0.5000, -0.5000, -0.2500, 0.8125, -0.3750, 1.000},
+            }
+        }
+    },
+
+    --UX FIXME: - 3way - have to place straight route before l and r or the 
+    --nodebox overlaps too much and can't place the straight track node.
+    ["_45"] = {
+        selection_box = {
+            type = "fixed",
+            fixed = {
+                {-0.5000, -0.5000, -1.1250, 0.5000, -0.3750, 0.8750},
+                {0.5000, -0.5000, -0.5000, 0.8750, -0.3750, 0.5000},
+                {-1.1250, -0.5000, -0.9375, -0.5000, -0.3750, 0.5000}
+            }
+        }
+    },
+
+    ["_60"] = {
+        selection_box = {
+            type = "fixed",
+            fixed = {
+                --{-0.5000, -0.5000, -0.875, 0.5000, -0.3750, 1.000},
+                {-0.875, -0.5000, -0.5, 1.0, -0.3750, 0.5},
+                --{-0.8750, -0.5000, -0.4375, -0.5000, -0.3750, 0.5625},
+                {-0.4375, -0.5000, -0.8750, 0.5625, -0.3750, -0.5000},
+                --{0.5000, -0.5000, -0.2500, 0.8125, -0.3750, 1.000},
+                {-0.2500, -0.5000, -0.2500, 1.0000, -0.3750, 0.8125},
+            }
+        }
+    },
+}
+
+
+local function y3_turnouts_addef(def, preset, suffix, rotation)
+    return y3_boxen[rotation] or {}
+end
+-- y-turnout
+advtrains.register_tracks("default", {
+	nodename_prefix="advtrains:dtrack_sy",
+	texture_prefix="advtrains_dtrack_sy",
+	models_prefix="advtrains_dtrack_sy",
+	models_suffix=".obj",
+	shared_texture="advtrains_dtrack_shared.png",
+	description=attrans("Y-turnout"),
+	formats = {},
+    get_additional_definiton = y3_turnouts_addef,
+}, advtrains.ap.t_yturnout)
+minetest.register_craft({
+	output = 'advtrains:dtrack_sy_placer 2',
+	recipe = {
+		{'advtrains:dtrack_placer', '', 'advtrains:dtrack_placer'},
+		{'', 'advtrains:dtrack_placer', ''},
+		{'', 'advtrains:dtrack_placer', ''},
+	},
+})
+--3-way turnout
+advtrains.register_tracks("default", {
+	nodename_prefix="advtrains:dtrack_s3",
+	texture_prefix="advtrains_dtrack_s3",
+	models_prefix="advtrains_dtrack_s3",
+	models_suffix=".obj",
+	shared_texture="advtrains_dtrack_shared.png",
+	description=attrans("3-way turnout"),
+	formats = {},
+    get_additional_definiton = y3_turnouts_addef,
+}, advtrains.ap.t_s3way)
+minetest.register_craft({
+	output = 'advtrains:dtrack_s3_placer 1',
+	recipe = {
+		{'advtrains:dtrack_placer', 'advtrains:dtrack_placer', 'advtrains:dtrack_placer'},
+		{'', 'advtrains:dtrack_placer', ''},
+		{'', '', ''},
+	},
+})
+
+-- Diamond Crossings
+
+local perp_boxen = {
+    [""] = {}, --default size
+    ["_30"] = {
+        selection_box = {
+            type = "fixed",
+            fixed = {
+                {-1.000, -0.5000, -1.000, 1.000, -0.3750, 1.000}
+            }
+        }
+    },
+    ["_45"] = {
+        selection_box = {
+            type = "fixed",
+            fixed = {
+                {-0.8125, -0.5000, -0.8125, 0.8125, -0.3750, 0.8125}
+            }
+        }
+    },
+    ["_60"] = {
+        selection_box = {
+            type = "fixed",
+            fixed = {
+                {-1.000, -0.5000, -1.000, 1.000, -0.3750, 1.000}
+            }
+        }
+    },
+}
+
+-- perpendicular
+advtrains.register_tracks("default", {
+	nodename_prefix="advtrains:dtrack_xing",
+	texture_prefix="advtrains_dtrack_xing",
+	models_prefix="advtrains_dtrack_xing",
+	models_suffix=".obj",
+	shared_texture="advtrains_dtrack_shared.png",
+	description=attrans("Perpendicular Diamond Crossing Track"),
+	formats = {},
+    get_additional_definiton = function(def, preset, suffix, rotation)
+        return perp_boxen[rotation] or {}
+    end
+}, advtrains.ap.t_perpcrossing)
+
+minetest.register_craft({
+	output = 'advtrains:dtrack_xing_placer 3',
+	recipe = {
+		{'', 'advtrains:dtrack_placer', ''},
+		{'advtrains:dtrack_placer', 'advtrains:dtrack_placer', 'advtrains:dtrack_placer'},
+		{'', 'advtrains:dtrack_placer', ''}
+	}
+})
+
+local ninety_plus_boxen = {
+    ["30l"] = {
+        selection_box = {
+            type = "fixed",
+            fixed = {
+                {-0.5000, -0.5000, -1.000, 0.5000, -0.3750, 1.000},
+                {-0.8750, -0.5000, -1.000, -0.5000, -0.3750, 0.2500},
+                {0.5000, -0.5000, -0.2500, 0.8750, -0.3750, 1.000},
+                {-0.1250, -0.5000, -1.375, 0.1875, -0.3750, -1.000}
+            }
+        }
+    },
+    ["30r"] = {
+        selection_box = {
+            type = "fixed",
+            fixed = {
+                {0.5000, -0.5000, -1.000, -0.5000, -0.3750, 1.000},
+                {0.8750, -0.5000, -1.000, 0.5000, -0.3750, 0.2500},
+                {-0.5000, -0.5000, -0.2500, -0.8750, -0.3750, 1.000},
+                {0.1250, -0.5000, -1.375, -0.1875, -0.3750, -1.000}
+            }
+        }
+    },
+    ["45l"] = {
+        selection_box = {
+            type = "fixed",
+            fixed = {
+                {-0.5000, -0.5000, -0.8750, 0.5000, -0.3750, 0.8750},
+                {0.5000, -0.5000, -0.5000, 0.8750, -0.3750, 0.5000},
+                {-0.8750, -0.5000, -0.5000, -0.5000, -0.3750, 0.5000}
+            }
+        }
+    },
+    ["45r"] = {
+        selection_box = {
+            type = "fixed",
+            fixed = {
+                {-0.5000, -0.5000, -0.8750, 0.5000, -0.3750, 0.8750},
+                {0.5000, -0.5000, -0.5000, 0.8750, -0.3750, 0.5000},
+                {-0.8750, -0.5000, -0.5000, -0.5000, -0.3750, 0.5000}
+            }
+        }
+    },
+    ["60l"] = {
+        selection_box = {
+            type = "fixed",
+            fixed = {
+                {-1.000, -0.5000, -0.5000, 1.000, -0.3750, 0.5000},
+                {-1.000, -0.5000, -0.8750, 0.2500, -0.3750, -0.5000},
+                {-0.2500, -0.5000, 0.5000, 1.000, -0.3750, 0.8750},
+                {-1.375, -0.5000, -0.1250, -1.000, -0.3750, 0.1875}
+            }
+        }
+    },
+    ["60r"] = {
+        selection_box = {
+            type = "fixed",
+            fixed = {
+                {1.000, -0.5000, -0.5000, -1.000, -0.3750, 0.5000},
+                {1.000, -0.5000, -0.8750, -0.2500, -0.3750, -0.5000},
+                {0.2500, -0.5000, 0.5000, -1.000, -0.3750, 0.8750},
+                {1.375, -0.5000, -0.1250, 1.000, -0.3750, 0.1875}
+            }
+        }
+    },
+}
+
+-- 90plusx
+-- When you face east and param2=0, then this set of rails has a rail at 90
+-- degrees to the viewer, plus another rail crossing at 30, 45 or 60 degrees.
+advtrains.register_tracks("default", {
+	nodename_prefix="advtrains:dtrack_xing90plusx",
+	texture_prefix="advtrains_dtrack_xing4590",
+	models_prefix="advtrains_dtrack_xing90plusx",
+	models_suffix=".obj",
+	shared_texture="advtrains_dtrack_shared.png",
+	description=attrans("90+Angle Diamond Crossing Track"),
+	formats = {},
+    get_additional_definiton = function(def, preset, suffix, rotation)
+        return ninety_plus_boxen[suffix] or {}
+    end,
+}, advtrains.ap.t_90plusx_crossing)
+minetest.register_craft({
+	output = 'advtrains:dtrack_xing90plusx_placer 2',
+	recipe = {
+		{'advtrains:dtrack_placer', '', ''},
+		{'advtrains:dtrack_placer', 'advtrains:dtrack_placer', 'advtrains:dtrack_placer'},
+		{'', '', 'advtrains:dtrack_placer'}
+	}
+})
+
+-- Deprecate any rails using the old name scheme
+minetest.register_lbm({
+	label = "Upgrade legacy 4590 rails",
+	name = "advtrains_train_track:replace_legacy_4590",
+	nodenames = {"advtrains:dtrack_xing4590_st"},
+	run_at_every_load = true,
+	action = function(pos, node)
+		minetest.log("actionPos!: " .. pos.x .. "," .. pos.y .. "," .. pos.z)
+		minetest.log("node!: " .. node.name .. "," .. node.param1 .. "," .. node.param2)
+		advtrains.ndb.swap_node(pos,
+		{
+			name="advtrains:dtrack_xing90plusx_45l",
+			param1=node.param1,
+			param2=node.param2,
+		})
+	end
+})
+-- This will replace any items left in the inventory
+minetest.register_alias("advtrains:dtrack_xing4590_placer", "advtrains:dtrack_xing90plusx_placer")
+
+local diagonal_boxen = {
+    ["30r45l"] = {
+        selection_box = {
+            type = "fixed",
+            fixed = {
+                {0.5000, -0.5000, -1.000, -0.5000, -0.3750, 1.000},
+                {0.8750, -0.5000, -1.000, 0.5000, -0.3750, 0.2500},
+                {-0.5000, -0.5000, -0.2500, -0.8750, -0.3750, 1.000},
+                {0.1250, -0.5000, -1.375, -0.1875, -0.3750, -1.000}
+            }
+        }
+    },
+    ["60l30l"] = {
+        selection_box = {
+            type = "fixed",
+            fixed = {
+                {-1.000, -0.5000, -0.5000, 1.000, -0.3750, 0.5000},
+                {-1.000, -0.5000, -0.8750, 0.2500, -0.3750, -0.5000},
+                {-0.2500, -0.5000, 0.5000, 1.000, -0.3750, 0.8750},
+                {-1.375, -0.5000, -0.1250, -1.000, -0.3750, 0.1875}
+            }
+        }
+    },
+    ["60l60r"] = {
+        selection_box = {
+            type = "fixed",
+            fixed = {
+                {-1.000, -0.5000, -1.000, 1.000, -0.3750, 1.000}
+            }
+        }
+    },
+    ["60r30r"] = {
+        selection_box = {
+            type = "fixed",
+            fixed = {
+                {1.000, -0.5000, -0.5000, -1.000, -0.3750, 0.5000},
+                {1.000, -0.5000, -0.8750, -0.2500, -0.3750, -0.5000},
+                {0.2500, -0.5000, 0.5000, -1.000, -0.3750, 0.8750},
+                {1.375, -0.5000, -0.1250, 1.000, -0.3750, 0.1875}
+            }
+        }
+    },
+    ["30l45r"] = {
+        selection_box = {
+            type = "fixed",
+            fixed = {
+                {-0.5000, -0.5000, -1.000, 0.5000, -0.3750, 1.000},
+                {-0.8750, -0.5000, -1.000, -0.5000, -0.3750, 0.2500},
+                {0.5000, -0.5000, -0.2500, 0.8750, -0.3750, 1.000},
+                {-0.1250, -0.5000, -1.375, 0.1875, -0.3750, -1.000}
+            }
+        }
+    },
+    ["60l45r"] = {
+        selection_box = {
+            type = "fixed",
+            fixed = {
+                {-1.000, -0.5000, -0.5000, 1.000, -0.3750, 0.5000},
+                {-1.000, -0.5000, -0.8750, 0.2500, -0.3750, -0.5000},
+                {-0.2500, -0.5000, 0.5000, 1.000, -0.3750, 0.8750},
+                {-1.375, -0.5000, -0.1250, -1.000, -0.3750, 0.1875}
+            }
+        }
+    },
+    ["60r45l"] = {
+        selection_box = {
+            type = "fixed",
+            fixed = {
+                {1.000, -0.5000, -0.5000, -1.000, -0.3750, 0.5000},
+                {1.000, -0.5000, -0.8750, -0.2500, -0.3750, -0.5000},
+                {0.2500, -0.5000, 0.5000, -1.000, -0.3750, 0.8750},
+                {1.375, -0.5000, -0.1250, 1.000, -0.3750, 0.1875}
+            }
+        }
+    },
+}
+
+-- Diagonal
+-- This set of rail crossings is named based on the angle of each intersecting
+-- direction when facing east and param2=0. Rails with l/r swapped are mirror
+-- images. For example, 30r45l is the mirror image of 30l45r.
+advtrains.register_tracks("default", {
+	nodename_prefix="advtrains:dtrack_xingdiag",
+	texture_prefix="advtrains_dtrack_xingdiag",
+	models_prefix="advtrains_dtrack_xingdiag",
+	models_suffix=".obj",
+	shared_texture="advtrains_dtrack_shared.png",
+	description=attrans("Diagonal Diamond Crossing Track"),
+	formats = {},
+    get_additional_definiton = function(def, preset, suffix, rotation)
+        return diagonal_boxen[suffix] or {}
+    end,
+}, advtrains.ap.t_diagonalcrossing)
+minetest.register_craft({
+	output = 'advtrains:dtrack_xingdiag_placer 2',
+	recipe = {
+		{'advtrains:dtrack_placer', '', 'advtrains:dtrack_placer'},
+		{'', 'advtrains:dtrack_placer', ''},
+		{'advtrains:dtrack_placer', '', 'advtrains:dtrack_placer'}
+	}
+})
+---- Not included: very shallow crossings like (30/60)+45.
+---- At an angle of only 18.4 degrees, the models would not
+---- translate well to a block game.
+-- END crossings
+
+--slopes
+advtrains.register_tracks("default", {
+	nodename_prefix="advtrains:dtrack",
+	texture_prefix="advtrains_dtrack",
+	models_prefix="advtrains_dtrack",
+	models_suffix=".obj",
+	shared_texture="advtrains_dtrack_shared.png",
+	second_texture="default_gravel.png",
+	description=attrans("Track"),
+	formats={vst1={true, false, true}, vst2={true, false, true}, vst31={true}, vst32={true}, vst33={true}},
+}, advtrains.ap.t_30deg_slope)
+
+minetest.register_craft({
+	type = "shapeless",
+	output = 'advtrains:dtrack_slopeplacer 2',
+	recipe = {
+		"advtrains:dtrack_placer",
+		"advtrains:dtrack_placer",
+		"default:gravel",
+	},
+})
+
+
+--bumpers
+advtrains.register_tracks("default", {
+	nodename_prefix="advtrains:dtrack_bumper",
+	texture_prefix="advtrains_dtrack_bumper",
+	models_prefix="advtrains_dtrack_bumper",
+	models_suffix=".b3d",
+	shared_texture="advtrains_dtrack_rail.png",
+	--bumpers still use the old texture until the models are redone.
+	description=attrans("Bumper"),
+	formats={},
+}, advtrains.ap.t_30deg_straightonly)
+minetest.register_craft({
+	output = 'advtrains:dtrack_bumper_placer 2',
+	recipe = {
+		{'group:wood', 'dye:red'},
+		{'default:steel_ingot', 'default:steel_ingot'},
+		{'advtrains:dtrack_placer', 'advtrains:dtrack_placer'},
+	},
+})
+--legacy bumpers
+for _,rot in ipairs({"", "_30", "_45", "_60"}) do
+	minetest.register_alias("advtrains:dtrack_bumper"..rot, "advtrains:dtrack_bumper_st"..rot)
+end
+-- atc track
+advtrains.register_tracks("default", {
+	nodename_prefix="advtrains:dtrack_atc",
+	texture_prefix="advtrains_dtrack_atc",
+	models_prefix="advtrains_dtrack",
+	models_suffix=".b3d",
+	shared_texture="advtrains_dtrack_shared_atc.png",
+	description=attrans("ATC controller"),
+	formats={},
+	get_additional_definiton = advtrains.atc_function
+}, advtrains.trackpresets.t_30deg_straightonly)
+
+
+-- Tracks for loading and unloading trains
+-- Copyright (C) 2017 Gabriel Pérez-Cerezo <gabriel@gpcf.eu>
+
+local function get_far_node(pos)
+	local node = minetest.get_node(pos)
+	if node.name == "ignore" then
+		minetest.get_voxel_manip():read_from_map(pos, pos)
+		node = minetest.get_node(pos)
+	end
+	return node
+end
+
+
+local function show_fc_formspec(pos,player)
+	local pname = player:get_player_name()
+	if minetest.is_protected(pos,pname) then
+		minetest.chat_send_player(pname, "Position is protected!")
+		return
+	end
+	
+	local meta = minetest.get_meta(pos)
+	local fc = meta:get_string("fc") or ""
+	
+	local form = 'formspec_version[4]'..
+		'size[10,5]'..
+		'label[0.5,0.4;Advtrains Loading/Unloading Track]'..
+		'label[0.5,1.1;Set the code to match against the wagon\'s freight code]'..
+		'label[0.5,1.6;A blank field matches all wagons (default)]'..
+		'label[0.5,2.1;Use code # to disable the track section]'..
+		'field[0.5,3;5.5,1;fc;FC;'..minetest.formspec_escape(fc)..']'..
+		'button[6.5,3;3,1;save;Submit]'
+	minetest.show_formspec(pname, "at_load_unload_"..advtrains.encode_pos(pos), form)
+end
+
+minetest.register_on_player_receive_fields(function(player, formname, fields)
+	local pname = player:get_player_name()
+	local pe = string.match(formname, "^at_load_unload_(............)$")
+	local pos = advtrains.decode_pos(pe)
+	if pos then
+		if minetest.is_protected(pos, pname) then
+			minetest.chat_send_player(pname, "Position is protected!")
+			return
+		end
+		
+		if fields.save then
+			minetest.get_meta(pos):set_string("fc",tostring(fields.fc))
+			minetest.chat_send_player(pname,"Freight code set: "..tostring(fields.fc))
+			show_fc_formspec(pos,player)
+		end
+	end
+end)
+
+
+local function train_load(pos, train_id, unload)
+	local train=advtrains.trains[train_id]
+	local below = get_far_node({x=pos.x, y=pos.y-1, z=pos.z})
+	if not string.match(below.name, "chest") then
+		atprint("this is not a chest! at "..minetest.pos_to_string(pos))
+		return
+	end
+	
+	local node_fc = minetest.get_meta(pos):get_string("fc") or ""
+	if node_fc == "#" then
+		--track section is disabled
+		return
+	end
+	
+	local inv = minetest.get_inventory({type="node", pos={x=pos.x, y=pos.y-1, z=pos.z}})
+	if inv and train.velocity < 2 then
+		for k, v in ipairs(train.trainparts) do
+			local i=minetest.get_inventory({type="detached", name="advtrains_wgn_"..v})
+			if i and i:get_list("box") then
+			
+				local wagon_data = advtrains.wagons[v]
+				local wagon_fc
+				if wagon_data.fc then
+					if not wagon_data.fcind then wagon_data.fcind = 1 end
+					wagon_fc = tostring(wagon_data.fc[wagon_data.fcind]) or ""
+				end
+				
+				if node_fc == "" or wagon_fc == node_fc then
+					if not unload then
+						for _, item in ipairs(inv:get_list("main")) do
+							if i:get_list("box") and i:room_for_item("box", item)  then
+								i:add_item("box", item)
+								inv:remove_item("main", item)
+							end
+						end
+					else
+						for _, item in ipairs(i:get_list("box")) do
+							if inv:get_list("main") and inv:room_for_item("main", item)  then
+								i:remove_item("box", item)
+								inv:add_item("main", item)
+							end
+						end
+					end
+				end
+			end
+		end
+	end
+end
+
+
+
+advtrains.register_tracks("default", {
+	nodename_prefix="advtrains:dtrack_unload",
+	texture_prefix="advtrains_dtrack_unload",
+	models_prefix="advtrains_dtrack",
+	models_suffix=".b3d",
+	shared_texture="advtrains_dtrack_shared_unload.png",
+	description=attrans("Unloading Track"),
+	formats={},
+	get_additional_definiton = function(def, preset, suffix, rotation)
+		return {
+			after_dig_node=function(pos)
+				advtrains.invalidate_all_paths()
+				advtrains.ndb.clear(pos)
+			end,
+			on_rightclick = function(pos, node, player)
+				show_fc_formspec(pos, player)
+			end,
+			advtrains = {
+				on_train_enter = function(pos, train_id)
+					train_load(pos, train_id, true)
+				end,
+			},
+		}
+	end
+				     }, advtrains.trackpresets.t_30deg_straightonly)
+advtrains.register_tracks("default", {
+	nodename_prefix="advtrains:dtrack_load",
+	texture_prefix="advtrains_dtrack_load",
+	models_prefix="advtrains_dtrack",
+	models_suffix=".b3d",
+	shared_texture="advtrains_dtrack_shared_load.png",
+	description=attrans("Loading Track"),
+	formats={},
+	get_additional_definiton = function(def, preset, suffix, rotation)
+		return {
+			after_dig_node=function(pos)
+				advtrains.invalidate_all_paths()
+				advtrains.ndb.clear(pos)
+			end,
+			on_rightclick = function(pos, node, player)
+				show_fc_formspec(pos, player)
+			end,
+			advtrains = {
+				on_train_enter = function(pos, train_id)
+					train_load(pos, train_id, false)
+				end,
+			},
+		}
+	end
+				     }, advtrains.trackpresets.t_30deg_straightonly)
+
+-- mod-dependent crafts
+local loader_core = "default:mese_crystal"  --fallback
+if minetest.get_modpath("basic_materials") then
+	loader_core = "basic_materials:ic"
+elseif minetest.get_modpath("technic") then
+	loader_core = "technic:control_logic_unit"
+end
+--print("Loader Core: "..loader_core)
+
+minetest.register_craft({
+	type="shapeless",
+	output = 'advtrains:dtrack_load_placer',
+	recipe = {
+		"advtrains:dtrack_placer",
+		loader_core,
+		"default:chest"
+	},
+})
+loader_core = nil --nil the crafting variable
+
+--craft between load/unload tracks
+minetest.register_craft({
+	type="shapeless",
+	output = 'advtrains:dtrack_unload_placer',
+	recipe = {
+		"advtrains:dtrack_load_placer",
+	},
+})
+minetest.register_craft({
+	type="shapeless",
+	output = 'advtrains:dtrack_load_placer',
+	recipe = {
+		"advtrains:dtrack_unload_placer",
+	},
+})
+
+
+if mesecon then
+	advtrains.register_tracks("default", {
+		nodename_prefix="advtrains:dtrack_detector_off",
+		texture_prefix="advtrains_dtrack_detector",
+		models_prefix="advtrains_dtrack",
+		models_suffix=".b3d",
+		shared_texture="advtrains_dtrack_shared_detector_off.png",
+		description=attrans("Detector Rail"),
+		formats={},
+		get_additional_definiton = function(def, preset, suffix, rotation)
+			return {
+				mesecons = {
+					receptor = {
+						state = mesecon.state.off,
+						rules = advtrains.meseconrules
+					}
+				},
+				advtrains = {
+					on_updated_from_nodedb = function(pos, node)
+						mesecon.receptor_off(pos, advtrains.meseconrules)
+					end,
+					on_train_enter=function(pos, train_id)
+						advtrains.ndb.swap_node(pos, {name="advtrains:dtrack_detector_on".."_"..suffix..rotation, param2=advtrains.ndb.get_node(pos).param2})
+						if advtrains.is_node_loaded(pos) then
+							mesecon.receptor_on(pos, advtrains.meseconrules)
+						end
+					end
+				}
+			}
+		end
+	}, advtrains.ap.t_30deg_straightonly)
+	advtrains.register_tracks("default", {
+		nodename_prefix="advtrains:dtrack_detector_on",
+		texture_prefix="advtrains_dtrack",
+		models_prefix="advtrains_dtrack",
+		models_suffix=".b3d",
+		shared_texture="advtrains_dtrack_shared_detector_on.png",
+		description="Detector(on)(you hacker you)",
+		formats={},
+		get_additional_definiton = function(def, preset, suffix, rotation)
+			return {
+				mesecons = {
+					receptor = {
+						state = mesecon.state.on,
+						rules = advtrains.meseconrules
+					}
+				},
+				advtrains = {
+					on_updated_from_nodedb = function(pos, node)
+						mesecon.receptor_on(pos, advtrains.meseconrules)
+					end,
+					on_train_leave=function(pos, train_id)
+						advtrains.ndb.swap_node(pos, {name="advtrains:dtrack_detector_off".."_"..suffix..rotation, param2=advtrains.ndb.get_node(pos).param2})
+						if advtrains.is_node_loaded(pos) then
+							mesecon.receptor_off(pos, advtrains.meseconrules)
+						end
+					end
+				}
+			}
+		end
+	}, advtrains.ap.t_30deg_straightonly_noplacer)
+minetest.register_craft({
+	type="shapeless",
+	output = 'advtrains:dtrack_detector_off_placer',
+	recipe = {
+		"advtrains:dtrack_placer",
+		"mesecons:wire_00000000_off"
+	},
+})
+end
+--TODO legacy
+--I know lbms are better for this purpose
+for name,rep in pairs({swl_st="swlst", swr_st="swrst", swl_cr="swlcr", swr_cr="swrcr", }) do
+	minetest.register_abm({
+    --  In the following two fields, also group:groupname will work.
+        nodenames = {"advtrains:track_"..name},
+       interval = 1.0, -- Operation interval in seconds
+       chance = 1, -- Chance of trigger per-node per-interval is 1.0 / this
+       action = function(pos, node, active_object_count, active_object_count_wider) minetest.set_node(pos, {name="advtrains:track_"..rep, param2=node.param2}) end,
+    })
+    minetest.register_abm({
+    --  In the following two fields, also group:groupname will work.
+        nodenames = {"advtrains:track_"..name.."_45"},
+       interval = 1.0, -- Operation interval in seconds
+       chance = 1, -- Chance of trigger per-node per-interval is 1.0 / this
+       action = function(pos, node, active_object_count, active_object_count_wider) minetest.set_node(pos, {name="advtrains:track_"..rep.."_45", param2=node.param2}) end,
+    })
+end
+
+if advtrains.register_replacement_lbms then
+minetest.register_lbm({
+	name = "advtrains:ramp_replacement_1",
+--  In the following two fields, also group:groupname will work.
+	nodenames = {"advtrains:track_vert1"},
+	action = function(pos, node, active_object_count, active_object_count_wider) minetest.set_node(pos, {name="advtrains:dtrack_vst1", param2=(node.param2+2)%4}) end,
+})
+minetest.register_lbm({
+	name = "advtrains:ramp_replacement_1",
+--  --  In the following two fields, also group:groupname will work.
+	nodenames = {"advtrains:track_vert2"},
+	action = function(pos, node, active_object_count, active_object_count_wider) minetest.set_node(pos, {name="advtrains:dtrack_vst2", param2=(node.param2+2)%4}) end,
+})
+	minetest.register_abm({
+		name = "advtrains:st_rep_1",
+	--  In the following two fields, also group:groupname will work.
+		nodenames = {"advtrains:track_st"},
+		interval=1,
+		chance=1,
+		action = function(pos, node, active_object_count, active_object_count_wider) minetest.set_node(pos, {name="advtrains:dtrack_st", param2=node.param2}) end,
+	})
+	minetest.register_lbm({
+		name = "advtrains:st_rep_1",
+	--  --  In the following two fields, also group:groupname will work.
+		nodenames = {"advtrains:track_st_45"},
+		action = function(pos, node, active_object_count, active_object_count_wider) minetest.set_node(pos, {name="advtrains:dtrack_st_45", param2=node.param2}) end,
+	})
+end