Extending to 30deg rails, creating and adding the models

tracks.lua

@@ -124,66 +124,66 @@ end
 function advtrains.register_tracks_finer(tracktype, def)
 	local function make_switchfunc(suffix_target)
 		return function(pos, node)
-		if advtrains.is_train_at_pos(pos) then return end
+			if advtrains.is_train_at_pos(pos) then return end
-		advtrains.invalidate_all_paths()
+			advtrains.invalidate_all_paths()
-		minetest.set_node(pos, {name=def.nodename_prefix.."_"..suffix_target, param2=node.param2})
+			minetest.set_node(pos, {name=def.nodename_prefix.."_"..suffix_target, param2=node.param2})
-		advtrains.reset_trackdb_position(pos)
+			advtrains.reset_trackdb_position(pos)
+		end
 	end
-end
+	local function make_overdef(img_suffix, conn1, conn2, switchfunc)
-local function make_overdef(img_suffix, conn1, conn2, switchfunc)
+		return {
-	return {
+			tiles = {def.texture_prefix.."_"..img_suffix..".png"},
-		tiles = {def.texture_prefix.."_"..img_suffix..".png"},
+			inventory_image = def.texture_prefix.."_"..img_suffix..".png",
-		inventory_image = def.texture_prefix.."_"..img_suffix..".png",
+			wield_image = def.texture_prefix.."_"..img_suffix..".png",
-		wield_image = def.texture_prefix.."_"..img_suffix..".png",
+			connect1=conn1,
-		connect1=conn1,
+			connect2=conn2,
-		connect2=conn2,
+			on_rightclick=switchfunc,
-		on_rightclick=switchfunc,
+		}
-	}
+	end
-end
+	local common_def=advtrains.merge_tables({
-local common_def=advtrains.merge_tables({
+		description = def.description,
-	description = def.description,
+		drawtype = "mesh",
-	drawtype = "mesh",
+		mesh = "trackplane.b3d",
-	mesh = "trackplane.b3d",
+		paramtype="light",
-	paramtype="light",
+		paramtype2="facedir",
-	paramtype2="facedir",
+		walkable = false,
-	walkable = false,
+		selection_box = {
-	selection_box = {
+			type = "fixed",
-		type = "fixed",
+			fixed = {-1/2, -1/2, -1/2, 1/2, -1/2+1/16, 1/2},
-		fixed = {-1/2, -1/2, -1/2, 1/2, -1/2+1/16, 1/2},
+		},
-	},
+		groups = {
-	groups = {
+			attached_node=1,
-		attached_node=1,
+			["advtrains_track_"..tracktype]=1,
-		["advtrains_track_"..tracktype]=1,
+			dig_immediate=2,
-		dig_immediate=2,
+			--not_in_creative_inventory=1,
-		not_in_creative_inventory=1,
+		},
-	},
+		rely1=0,
-	rely1=0,
+		rely2=0,
-	rely2=0,
+		railheight=0,
-	railheight=0,
+		drop="advtrains:placetrack_"..tracktype,
-	drop="advtrains:placetrack_"..tracktype,
+		--on_rightclick=function(pos, node, clicker)
-	--on_rightclick=function(pos, node, clicker)
+		--	minetest.set_node(pos, {name=node.name, param2=(node.param2+1)%4})
-	--	minetest.set_node(pos, {name=node.name, param2=(node.param2+1)%4})
+		--end
-	--end
+		can_dig=function(pos)
-	can_dig=function(pos)
+			return not advtrains.is_train_at_pos(pos)
-	return not advtrains.is_train_at_pos(pos)
+		end,
-end,
+		after_dig_node=function(pos)
-after_dig_node=function(pos)
+			advtrains.invalidate_all_paths()
-advtrains.invalidate_all_paths()
+			advtrains.reset_trackdb_position(pos)
-advtrains.reset_trackdb_position(pos)
 		end,
 		after_place_node=function(pos)
-		advtrains.reset_trackdb_position(pos)
+			advtrains.reset_trackdb_position(pos)
 		end,
 	}, def.common or {})
 	minetest.register_node(def.nodename_prefix.."_st", advtrains.merge_tables(common_def, make_overdef("st", 0, 8), def.straight or {}))
-	minetest.register_node(def.nodename_prefix.."_st_22", advtrains.merge_tables(common_def, make_overdef("st_22", 1, 9), def.straight22 or {}))
+	minetest.register_node(def.nodename_prefix.."_st_30", advtrains.merge_tables(common_def, make_overdef("st_30", 1, 9), def.straight30 or {}))
 	minetest.register_node(def.nodename_prefix.."_st_45", advtrains.merge_tables(common_def, make_overdef("st_45", 2, 10), def.straight45 or {}))
-	minetest.register_node(def.nodename_prefix.."_st_67", advtrains.merge_tables(common_def, make_overdef("st_67", 3, 11), def.straight67 or {}))
+	minetest.register_node(def.nodename_prefix.."_st_60", advtrains.merge_tables(common_def, make_overdef("st_60", 3, 11), def.straight60 or {}))
 	
 	minetest.register_node(def.nodename_prefix.."_cr", advtrains.merge_tables(common_def, make_overdef("cr", 0, 7), def.curve or {}))
-	minetest.register_node(def.nodename_prefix.."_cr_22", advtrains.merge_tables(common_def, make_overdef("cr_22", 1, 8), def.curve45 or {}))
+	minetest.register_node(def.nodename_prefix.."_cr_30", advtrains.merge_tables(common_def, make_overdef("cr_30", 1, 8), def.curve45 or {}))
 	minetest.register_node(def.nodename_prefix.."_cr_45", advtrains.merge_tables(common_def, make_overdef("cr_45", 2, 9), def.curve45 or {}))
-	minetest.register_node(def.nodename_prefix.."_cr_67", advtrains.merge_tables(common_def, make_overdef("cr_67", 3, 10), def.curve45 or {}))
+	minetest.register_node(def.nodename_prefix.."_cr_60", advtrains.merge_tables(common_def, make_overdef("cr_60", 3, 10), def.curve45 or {}))
 	
 	--[[advtrains.trackplacer_register(def.nodename_prefix.."_st", 0, 8)
 	advtrains.trackplacer_register(def.nodename_prefix.."_st_45", 2, 10)
@@ -223,6 +223,108 @@ advtrains.reset_trackdb_position(pos)
 	table.insert(advtrains.all_tracktypes, tracktype)
 end
 
+--def must include: models_prefix, models_suffix(with dot)
+-- def.shared_texture="full_name.png" if shared texture for all models is wanted
+function advtrains.register_tracks_modeled(tracktype, def)
+	local function make_switchfunc(suffix_target)
+		return function(pos, node)
+			if advtrains.is_train_at_pos(pos) then return end
+			advtrains.invalidate_all_paths()
+			minetest.set_node(pos, {name=def.nodename_prefix.."_"..suffix_target, param2=node.param2})
+			advtrains.reset_trackdb_position(pos)
+		end
+	end
+	local function make_overdef(img_suffix, conn1, conn2, switchfunc)
+		return {
+			mesh = def.models_prefix.."_"..img_suffix..def.models_suffix,
+			tiles = {def.shared_texture or (def.texture_prefix.."_"..img_suffix..".png")},
+			inventory_image = def.texture_prefix.."_"..img_suffix..".png",
+			wield_image = def.texture_prefix.."_"..img_suffix..".png",
+			connect1=conn1,
+			connect2=conn2,
+			on_rightclick=switchfunc,
+		}
+	end
+	local common_def=advtrains.merge_tables({
+		description = def.description,
+		drawtype = "mesh",
+		paramtype="light",
+		paramtype2="facedir",
+		walkable = false,
+		selection_box = {
+			type = "fixed",
+			fixed = {-1/2, -1/2, -1/2, 1/2, -1/2+1/16, 1/2},
+		},
+		groups = {
+			attached_node=1,
+			["advtrains_track_"..tracktype]=1,
+			dig_immediate=2,
+			--not_in_creative_inventory=1,
+		},
+		rely1=0,
+		rely2=0,
+		railheight=0,
+		drop="advtrains:placetrack_"..tracktype,
+		--on_rightclick=function(pos, node, clicker)
+		--	minetest.set_node(pos, {name=node.name, param2=(node.param2+1)%4})
+		--end
+		can_dig=function(pos)
+			return not advtrains.is_train_at_pos(pos)
+		end,
+		after_dig_node=function(pos)
+			advtrains.invalidate_all_paths()
+			advtrains.reset_trackdb_position(pos)
+		end,
+		after_place_node=function(pos)
+			advtrains.reset_trackdb_position(pos)
+		end,
+	}, def.common or {})
+	minetest.register_node(def.nodename_prefix.."_st", advtrains.merge_tables(common_def, make_overdef("st", 0, 8), def.straight or {}))
+	minetest.register_node(def.nodename_prefix.."_st_30", advtrains.merge_tables(common_def, make_overdef("st_30", 1, 9), def.straight30 or {}))
+	minetest.register_node(def.nodename_prefix.."_st_45", advtrains.merge_tables(common_def, make_overdef("st_45", 2, 10), def.straight45 or {}))
+	minetest.register_node(def.nodename_prefix.."_st_60", advtrains.merge_tables(common_def, make_overdef("st_60", 3, 11), def.straight60 or {}))
+	
+	minetest.register_node(def.nodename_prefix.."_cr", advtrains.merge_tables(common_def, make_overdef("cr", 0, 7), def.curve or {}))
+	minetest.register_node(def.nodename_prefix.."_cr_30", advtrains.merge_tables(common_def, make_overdef("cr_30", 1, 8), def.curve45 or {}))
+	minetest.register_node(def.nodename_prefix.."_cr_45", advtrains.merge_tables(common_def, make_overdef("cr_45", 2, 9), def.curve45 or {}))
+	minetest.register_node(def.nodename_prefix.."_cr_60", advtrains.merge_tables(common_def, make_overdef("cr_60", 3, 10), def.curve45 or {}))
+	
+	--[[advtrains.trackplacer_register(def.nodename_prefix.."_st", 0, 8)
+	advtrains.trackplacer_register(def.nodename_prefix.."_st_45", 2, 10)
+	advtrains.trackplacer_register(def.nodename_prefix.."_cr", 0, 6)
+	advtrains.trackplacer_register(def.nodename_prefix.."_cr_45", 2, 8)
+	--]]
+	--[[
+	minetest.register_node(def.nodename_prefix.."_swl_st", advtrains.merge_tables(common_def, make_overdef("swl_st", 0, 8, make_switchfunc("swl_cr")), def.lswitchst or {}))
+	minetest.register_node(def.nodename_prefix.."_swl_st_45", advtrains.merge_tables(common_def, make_overdef("swl_st_45", 2, 10, make_switchfunc("swl_cr_45")), def.lswitchst45 or {}))
+	minetest.register_node(def.nodename_prefix.."_swl_cr", advtrains.merge_tables(common_def, make_overdef("swl_cr", 0, 6, make_switchfunc("swl_st")), def.lswitchcr or {}))
+	minetest.register_node(def.nodename_prefix.."_swl_cr_45", advtrains.merge_tables(common_def, make_overdef("swl_cr_45", 2, 8, make_switchfunc("swl_st_45")), def.lswitchcr45 or {}))
+	
+	minetest.register_node(def.nodename_prefix.."_swr_st", advtrains.merge_tables(common_def, make_overdef("swr_st", 0, 8, make_switchfunc("swr_cr")), def.rswitchst or {}))
+	minetest.register_node(def.nodename_prefix.."_swr_st_45", advtrains.merge_tables(common_def, make_overdef("swr_st_45", 2, 10, make_switchfunc("swr_cr_45")), def.rswitchst45 or {}))
+	minetest.register_node(def.nodename_prefix.."_swr_cr", advtrains.merge_tables(common_def, make_overdef("swr_cr", 0, 10, make_switchfunc("swr_st")), def.rswitchcr or {}))
+	minetest.register_node(def.nodename_prefix.."_swr_cr_45", advtrains.merge_tables(common_def, make_overdef("swr_cr_45", 2, 12, make_switchfunc("swr_st_45")), def.rswitchcr45 or {}))
+	
+	minetest.register_node(def.nodename_prefix.."_vert1", advtrains.merge_tables(common_def, make_overdef("vert1", 0, 8), {
+	mesh = "trackvertical1.b3d",
+	rely1=0,
+	rely2=0.5,
+	railheight=0.25,
+	description = def.description.." (vertical track lower node)",
+	}, def.vert1 or {}))
+	minetest.register_node(def.nodename_prefix.."_vert2", advtrains.merge_tables(common_def, make_overdef("vert2", 0, 8), {
+	mesh = "trackvertical2.b3d",
+	rely1=0.5,
+	rely2=1,
+	railheight=0.75,
+	description = def.description.." (vertical track upper node)",
+	},def.vert2 or {}))
+	]]
+	
+	advtrains.register_track_placer(def.nodename_prefix, def.texture_prefix, def.description)
+	table.insert(advtrains.all_tracktypes, tracktype)
+end
+
 advtrains.register_tracks("regular", {
 	nodename_prefix="advtrains:track",
 	texture_prefix="advtrains_track",
@@ -230,11 +332,20 @@ advtrains.register_tracks("regular", {
 })
 
 advtrains.register_tracks_finer("fineturns", {
-	nodename_prefix="advtrains:dtrack",
+	nodename_prefix="advtrains:olddtrack",
 	texture_prefix="advtrains_dtrack",
 	description="Fine Turn Train Track",
 })
 
+advtrains.register_tracks_modeled("default", {
+	nodename_prefix="advtrains:dtrack",
+	texture_prefix="advtrains_dtrack",
+	models_prefix="advtrains_dtrack",
+	models_suffix=".b3d",
+	shared_texture="advtrains_dtrack_rail.png",
+	description="New Default Train Track",
+})
+
 function advtrains.is_track_and_drives_on(nodename, drives_on)
 	if not minetest.registered_nodes[nodename] then
 		return false

tracks.lua~

@@ -0,0 +1,377 @@
+--advtrains by orwell96, see readme.txt
+
+--[[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={}
+
+function advtrains.register_tracks(tracktype, def)
+	local function make_switchfunc(suffix_target)
+		return function(pos, node)
+			if advtrains.is_train_at_pos(pos) then return end
+			advtrains.invalidate_all_paths()
+			minetest.set_node(pos, {name=def.nodename_prefix.."_"..suffix_target, param2=node.param2})
+			advtrains.reset_trackdb_position(pos)
+		end
+	end
+	local function make_overdef(img_suffix, conn1, conn2, switchfunc)
+		return {
+			tiles = {def.texture_prefix.."_"..img_suffix..".png"},
+			inventory_image = def.texture_prefix.."_"..img_suffix..".png",
+			wield_image = def.texture_prefix.."_"..img_suffix..".png",
+			connect1=conn1,
+			connect2=conn2,
+			on_rightclick=switchfunc,
+		}
+	end
+	local common_def=advtrains.merge_tables({
+		description = def.description,
+		drawtype = "mesh",
+		mesh = "trackplane.b3d",
+		paramtype="light",
+		paramtype2="facedir",
+		walkable = false,
+		selection_box = {
+			type = "fixed",
+			fixed = {-1/2, -1/2, -1/2, 1/2, -1/2+1/16, 1/2},
+		},
+		groups = {
+			attached_node=1,
+			["advtrains_track_"..tracktype]=1,
+			dig_immediate=2,
+			not_in_creative_inventory=1,
+		},
+		rely1=0,
+		rely2=0,
+		railheight=0,
+		drop="advtrains:placetrack_"..tracktype,
+		--on_rightclick=function(pos, node, clicker)
+		--	minetest.set_node(pos, {name=node.name, param2=(node.param2+1)%4})
+		--end
+		can_dig=function(pos)
+			return not advtrains.is_train_at_pos(pos)
+		end,
+		after_dig_node=function(pos)
+			advtrains.invalidate_all_paths()
+			advtrains.reset_trackdb_position(pos)
+		end,
+		after_place_node=function(pos)
+			advtrains.reset_trackdb_position(pos)
+		end,
+	}, def.common or {})
+	minetest.register_node(def.nodename_prefix.."_st", advtrains.merge_tables(common_def, make_overdef("st", 0, 8), def.straight or {}))
+	minetest.register_node(def.nodename_prefix.."_st_45", advtrains.merge_tables(common_def, make_overdef("st_45", 2, 10), def.straight45 or {}))
+	
+	minetest.register_node(def.nodename_prefix.."_cr", advtrains.merge_tables(common_def, make_overdef("cr", 0, 6), def.curve or {}))
+	minetest.register_node(def.nodename_prefix.."_cr_45", advtrains.merge_tables(common_def, make_overdef("cr_45", 2, 8), def.curve45 or {}))
+	
+	advtrains.trackplacer_register(def.nodename_prefix.."_st", 0, 8)
+	advtrains.trackplacer_register(def.nodename_prefix.."_st_45", 2, 10)
+	advtrains.trackplacer_register(def.nodename_prefix.."_cr", 0, 6)
+	advtrains.trackplacer_register(def.nodename_prefix.."_cr_45", 2, 8)
+	
+	
+	minetest.register_node(def.nodename_prefix.."_swl_st", advtrains.merge_tables(common_def, make_overdef("swl_st", 0, 8, make_switchfunc("swl_cr")), def.lswitchst or {}))
+	minetest.register_node(def.nodename_prefix.."_swl_st_45", advtrains.merge_tables(common_def, make_overdef("swl_st_45", 2, 10, make_switchfunc("swl_cr_45")), def.lswitchst45 or {}))
+	minetest.register_node(def.nodename_prefix.."_swl_cr", advtrains.merge_tables(common_def, make_overdef("swl_cr", 0, 6, make_switchfunc("swl_st")), def.lswitchcr or {}))
+	minetest.register_node(def.nodename_prefix.."_swl_cr_45", advtrains.merge_tables(common_def, make_overdef("swl_cr_45", 2, 8, make_switchfunc("swl_st_45")), def.lswitchcr45 or {}))
+	
+	minetest.register_node(def.nodename_prefix.."_swr_st", advtrains.merge_tables(common_def, make_overdef("swr_st", 0, 8, make_switchfunc("swr_cr")), def.rswitchst or {}))
+	minetest.register_node(def.nodename_prefix.."_swr_st_45", advtrains.merge_tables(common_def, make_overdef("swr_st_45", 2, 10, make_switchfunc("swr_cr_45")), def.rswitchst45 or {}))
+	minetest.register_node(def.nodename_prefix.."_swr_cr", advtrains.merge_tables(common_def, make_overdef("swr_cr", 0, 10, make_switchfunc("swr_st")), def.rswitchcr or {}))
+	minetest.register_node(def.nodename_prefix.."_swr_cr_45", advtrains.merge_tables(common_def, make_overdef("swr_cr_45", 2, 12, make_switchfunc("swr_st_45")), def.rswitchcr45 or {}))
+	
+	minetest.register_node(def.nodename_prefix.."_vert1", advtrains.merge_tables(common_def, make_overdef("vert1", 0, 8), {
+		mesh = "trackvertical1.b3d",
+		rely1=0,
+		rely2=0.5,
+		railheight=0.25,
+		description = def.description.." (vertical track lower node)",
+		}, def.vert1 or {}))
+	minetest.register_node(def.nodename_prefix.."_vert2", advtrains.merge_tables(common_def, make_overdef("vert2", 0, 8), {
+		mesh = "trackvertical2.b3d",
+		rely1=0.5,
+		rely2=1,
+		railheight=0.75,
+		description = def.description.." (vertical track upper node)",
+		},def.vert2 or {}))
+	
+	advtrains.register_track_placer(def.nodename_prefix, def.texture_prefix, def.description)
+	table.insert(advtrains.all_tracktypes, tracktype)
+end
+
+function advtrains.register_tracks_finer(tracktype, def)
+	local function make_switchfunc(suffix_target)
+		return function(pos, node)
+			if advtrains.is_train_at_pos(pos) then return end
+			advtrains.invalidate_all_paths()
+			minetest.set_node(pos, {name=def.nodename_prefix.."_"..suffix_target, param2=node.param2})
+			advtrains.reset_trackdb_position(pos)
+		end
+	end
+	local function make_overdef(img_suffix, conn1, conn2, switchfunc)
+		return {
+			tiles = {def.texture_prefix.."_"..img_suffix..".png"},
+			inventory_image = def.texture_prefix.."_"..img_suffix..".png",
+			wield_image = def.texture_prefix.."_"..img_suffix..".png",
+			connect1=conn1,
+			connect2=conn2,
+			on_rightclick=switchfunc,
+		}
+	end
+	local common_def=advtrains.merge_tables({
+		description = def.description,
+		drawtype = "mesh",
+		mesh = "trackplane.b3d",
+		paramtype="light",
+		paramtype2="facedir",
+		walkable = false,
+		selection_box = {
+			type = "fixed",
+			fixed = {-1/2, -1/2, -1/2, 1/2, -1/2+1/16, 1/2},
+		},
+		groups = {
+			attached_node=1,
+			["advtrains_track_"..tracktype]=1,
+			dig_immediate=2,
+			--not_in_creative_inventory=1,
+		},
+		rely1=0,
+		rely2=0,
+		railheight=0,
+		drop="advtrains:placetrack_"..tracktype,
+		--on_rightclick=function(pos, node, clicker)
+		--	minetest.set_node(pos, {name=node.name, param2=(node.param2+1)%4})
+		--end
+		can_dig=function(pos)
+			return not advtrains.is_train_at_pos(pos)
+		end,
+		after_dig_node=function(pos)
+			advtrains.invalidate_all_paths()
+			advtrains.reset_trackdb_position(pos)
+		end,
+		after_place_node=function(pos)
+			advtrains.reset_trackdb_position(pos)
+		end,
+	}, def.common or {})
+	minetest.register_node(def.nodename_prefix.."_st", advtrains.merge_tables(common_def, make_overdef("st", 0, 8), def.straight or {}))
+	minetest.register_node(def.nodename_prefix.."_st_30", advtrains.merge_tables(common_def, make_overdef("st_30", 1, 9), def.straight30 or {}))
+	minetest.register_node(def.nodename_prefix.."_st_45", advtrains.merge_tables(common_def, make_overdef("st_45", 2, 10), def.straight45 or {}))
+	minetest.register_node(def.nodename_prefix.."_st_60", advtrains.merge_tables(common_def, make_overdef("st_60", 3, 11), def.straight60 or {}))
+	
+	minetest.register_node(def.nodename_prefix.."_cr", advtrains.merge_tables(common_def, make_overdef("cr", 0, 7), def.curve or {}))
+	minetest.register_node(def.nodename_prefix.."_cr_30", advtrains.merge_tables(common_def, make_overdef("cr_30", 1, 8), def.curve45 or {}))
+	minetest.register_node(def.nodename_prefix.."_cr_45", advtrains.merge_tables(common_def, make_overdef("cr_45", 2, 9), def.curve45 or {}))
+	minetest.register_node(def.nodename_prefix.."_cr_60", advtrains.merge_tables(common_def, make_overdef("cr_60", 3, 10), def.curve45 or {}))
+	
+	--[[advtrains.trackplacer_register(def.nodename_prefix.."_st", 0, 8)
+	advtrains.trackplacer_register(def.nodename_prefix.."_st_45", 2, 10)
+	advtrains.trackplacer_register(def.nodename_prefix.."_cr", 0, 6)
+	advtrains.trackplacer_register(def.nodename_prefix.."_cr_45", 2, 8)
+	--]]
+	--[[
+	minetest.register_node(def.nodename_prefix.."_swl_st", advtrains.merge_tables(common_def, make_overdef("swl_st", 0, 8, make_switchfunc("swl_cr")), def.lswitchst or {}))
+	minetest.register_node(def.nodename_prefix.."_swl_st_45", advtrains.merge_tables(common_def, make_overdef("swl_st_45", 2, 10, make_switchfunc("swl_cr_45")), def.lswitchst45 or {}))
+	minetest.register_node(def.nodename_prefix.."_swl_cr", advtrains.merge_tables(common_def, make_overdef("swl_cr", 0, 6, make_switchfunc("swl_st")), def.lswitchcr or {}))
+	minetest.register_node(def.nodename_prefix.."_swl_cr_45", advtrains.merge_tables(common_def, make_overdef("swl_cr_45", 2, 8, make_switchfunc("swl_st_45")), def.lswitchcr45 or {}))
+	
+	minetest.register_node(def.nodename_prefix.."_swr_st", advtrains.merge_tables(common_def, make_overdef("swr_st", 0, 8, make_switchfunc("swr_cr")), def.rswitchst or {}))
+	minetest.register_node(def.nodename_prefix.."_swr_st_45", advtrains.merge_tables(common_def, make_overdef("swr_st_45", 2, 10, make_switchfunc("swr_cr_45")), def.rswitchst45 or {}))
+	minetest.register_node(def.nodename_prefix.."_swr_cr", advtrains.merge_tables(common_def, make_overdef("swr_cr", 0, 10, make_switchfunc("swr_st")), def.rswitchcr or {}))
+	minetest.register_node(def.nodename_prefix.."_swr_cr_45", advtrains.merge_tables(common_def, make_overdef("swr_cr_45", 2, 12, make_switchfunc("swr_st_45")), def.rswitchcr45 or {}))
+	
+	minetest.register_node(def.nodename_prefix.."_vert1", advtrains.merge_tables(common_def, make_overdef("vert1", 0, 8), {
+		mesh = "trackvertical1.b3d",
+		rely1=0,
+		rely2=0.5,
+		railheight=0.25,
+		description = def.description.." (vertical track lower node)",
+	}, def.vert1 or {}))
+	minetest.register_node(def.nodename_prefix.."_vert2", advtrains.merge_tables(common_def, make_overdef("vert2", 0, 8), {
+		mesh = "trackvertical2.b3d",
+		rely1=0.5,
+		rely2=1,
+		railheight=0.75,
+		description = def.description.." (vertical track upper node)",
+	},def.vert2 or {}))
+	]]
+	
+	--we don't have texures yet
+	
+	advtrains.register_track_placer(def.nodename_prefix, def.texture_prefix, def.description)
+	table.insert(advtrains.all_tracktypes, tracktype)
+end
+
+--def must include: models_prefix, models_suffix(with dot)
+-- def.shared_texture="full_name.png" if shared texture for all models is wanted
+function advtrains.register_tracks_modeled(tracktype, def)
+	local function make_switchfunc(suffix_target)
+		return function(pos, node)
+			if advtrains.is_train_at_pos(pos) then return end
+			advtrains.invalidate_all_paths()
+			minetest.set_node(pos, {name=def.nodename_prefix.."_"..suffix_target, param2=node.param2})
+			advtrains.reset_trackdb_position(pos)
+		end
+	end
+	local function make_overdef(img_suffix, conn1, conn2, switchfunc)
+		return {
+			mesh = def.models_prefix.."_"..img_suffix..def.models_suffix,
+			tiles = {def.shared_texture or (def.texture_prefix.."_"..img_suffix..".png")},
+			inventory_image = def.texture_prefix.."_"..img_suffix..".png",
+			wield_image = def.texture_prefix.."_"..img_suffix..".png",
+			connect1=conn1,
+			connect2=conn2,
+			on_rightclick=switchfunc,
+		}
+	end
+	local common_def=advtrains.merge_tables({
+		description = def.description,
+		drawtype = "mesh",
+		paramtype="light",
+		paramtype2="facedir",
+		walkable = false,
+		selection_box = {
+			type = "fixed",
+			fixed = {-1/2, -1/2, -1/2, 1/2, -1/2+1/16, 1/2},
+		},
+		groups = {
+			attached_node=1,
+			["advtrains_track_"..tracktype]=1,
+			dig_immediate=2,
+			--not_in_creative_inventory=1,
+		},
+		rely1=0,
+		rely2=0,
+		railheight=0,
+		drop="advtrains:placetrack_"..tracktype,
+		--on_rightclick=function(pos, node, clicker)
+		--	minetest.set_node(pos, {name=node.name, param2=(node.param2+1)%4})
+		--end
+		can_dig=function(pos)
+			return not advtrains.is_train_at_pos(pos)
+		end,
+		after_dig_node=function(pos)
+			advtrains.invalidate_all_paths()
+			advtrains.reset_trackdb_position(pos)
+		end,
+		after_place_node=function(pos)
+			advtrains.reset_trackdb_position(pos)
+		end,
+	}, def.common or {})
+	minetest.register_node(def.nodename_prefix.."_st", advtrains.merge_tables(common_def, make_overdef("st", 0, 8), def.straight or {}))
+	minetest.register_node(def.nodename_prefix.."_st_30", advtrains.merge_tables(common_def, make_overdef("st_30", 1, 9), def.straight30 or {}))
+	minetest.register_node(def.nodename_prefix.."_st_45", advtrains.merge_tables(common_def, make_overdef("st_45", 2, 10), def.straight45 or {}))
+	minetest.register_node(def.nodename_prefix.."_st_60", advtrains.merge_tables(common_def, make_overdef("st_60", 3, 11), def.straight60 or {}))
+	
+	minetest.register_node(def.nodename_prefix.."_cr", advtrains.merge_tables(common_def, make_overdef("cr", 0, 7), def.curve or {}))
+	minetest.register_node(def.nodename_prefix.."_cr_30", advtrains.merge_tables(common_def, make_overdef("cr_30", 1, 8), def.curve45 or {}))
+	minetest.register_node(def.nodename_prefix.."_cr_45", advtrains.merge_tables(common_def, make_overdef("cr_45", 2, 9), def.curve45 or {}))
+	minetest.register_node(def.nodename_prefix.."_cr_60", advtrains.merge_tables(common_def, make_overdef("cr_60", 3, 10), def.curve45 or {}))
+	
+	--[[advtrains.trackplacer_register(def.nodename_prefix.."_st", 0, 8)
+	advtrains.trackplacer_register(def.nodename_prefix.."_st_45", 2, 10)
+	advtrains.trackplacer_register(def.nodename_prefix.."_cr", 0, 6)
+	advtrains.trackplacer_register(def.nodename_prefix.."_cr_45", 2, 8)
+	--]]
+	--[[
+	minetest.register_node(def.nodename_prefix.."_swl_st", advtrains.merge_tables(common_def, make_overdef("swl_st", 0, 8, make_switchfunc("swl_cr")), def.lswitchst or {}))
+	minetest.register_node(def.nodename_prefix.."_swl_st_45", advtrains.merge_tables(common_def, make_overdef("swl_st_45", 2, 10, make_switchfunc("swl_cr_45")), def.lswitchst45 or {}))
+	minetest.register_node(def.nodename_prefix.."_swl_cr", advtrains.merge_tables(common_def, make_overdef("swl_cr", 0, 6, make_switchfunc("swl_st")), def.lswitchcr or {}))
+	minetest.register_node(def.nodename_prefix.."_swl_cr_45", advtrains.merge_tables(common_def, make_overdef("swl_cr_45", 2, 8, make_switchfunc("swl_st_45")), def.lswitchcr45 or {}))
+	
+	minetest.register_node(def.nodename_prefix.."_swr_st", advtrains.merge_tables(common_def, make_overdef("swr_st", 0, 8, make_switchfunc("swr_cr")), def.rswitchst or {}))
+	minetest.register_node(def.nodename_prefix.."_swr_st_45", advtrains.merge_tables(common_def, make_overdef("swr_st_45", 2, 10, make_switchfunc("swr_cr_45")), def.rswitchst45 or {}))
+	minetest.register_node(def.nodename_prefix.."_swr_cr", advtrains.merge_tables(common_def, make_overdef("swr_cr", 0, 10, make_switchfunc("swr_st")), def.rswitchcr or {}))
+	minetest.register_node(def.nodename_prefix.."_swr_cr_45", advtrains.merge_tables(common_def, make_overdef("swr_cr_45", 2, 12, make_switchfunc("swr_st_45")), def.rswitchcr45 or {}))
+	
+	minetest.register_node(def.nodename_prefix.."_vert1", advtrains.merge_tables(common_def, make_overdef("vert1", 0, 8), {
+	mesh = "trackvertical1.b3d",
+	rely1=0,
+	rely2=0.5,
+	railheight=0.25,
+	description = def.description.." (vertical track lower node)",
+	}, def.vert1 or {}))
+	minetest.register_node(def.nodename_prefix.."_vert2", advtrains.merge_tables(common_def, make_overdef("vert2", 0, 8), {
+	mesh = "trackvertical2.b3d",
+	rely1=0.5,
+	rely2=1,
+	railheight=0.75,
+	description = def.description.." (vertical track upper node)",
+	},def.vert2 or {}))
+	]]
+	
+	advtrains.register_track_placer(def.nodename_prefix, def.texture_prefix, def.description)
+	table.insert(advtrains.all_tracktypes, tracktype)
+end
+
+advtrains.register_tracks("regular", {
+	nodename_prefix="advtrains:track",
+	texture_prefix="advtrains_track",
+	description="Regular Train Track",
+})
+
+advtrains.register_tracks_finer("fineturns", {
+	nodename_prefix="advtrains:olddtrack",
+	texture_prefix="advtrains_dtrack",
+	description="Fine Turn Train Track",
+})
+
+advtrains.register_tracks_finer("default", {
+	nodename_prefix="advtrains:dtrack",
+	texture_prefix="advtrains_dtrack",
+	models_prefix="advtrains_dtrack",
+	models_suffix=".b3d",
+	shared_texture="advtrains_dtrack_rail.png",
+	description="New Default Train Track",
+})
+
+function advtrains.is_track_and_drives_on(nodename, drives_on)
+	if not minetest.registered_nodes[nodename] then
+		return false
+	end
+	local nodedef=minetest.registered_nodes[nodename]
+	for k,v in ipairs(drives_on) do
+		if nodedef.groups["advtrains_track_"..v] then
+			return true
+		end
+	end
+	return false
+end
+
+function advtrains.get_track_connections(name, param2)
+	local nodedef=minetest.registered_nodes[name]
+	if not nodedef then print("[advtrains] get_track_connections couldn't find nodedef for nodename "..(name or "nil")) return 0, 8, 0, 0, 0 end
+	local noderot=param2
+	if not param2 then noderot=0 end
+	if noderot > 3 then print("[advtrains] get_track_connections: rail has invaild param2 of "..noderot) noderot=0 end
+	
+	return (nodedef.connect1 + 4 * noderot)%16, (nodedef.connect2  + 4 * noderot)%16, nodedef.rely1 or 0, nodedef.rely2 or 0, nodedef.railheight or 0
+end
+
+
+
+
+
+
+

wagons.lua

@@ -347,7 +347,7 @@ function advtrains.register_wagon(sysname, traintype, prototype)
 		end,
 	})
 end
-advtrains.register_train_type("steam", {"regular", "fineturns"})
+advtrains.register_train_type("steam", {"regular", "fineturns", "default"})
 
 --[[advtrains.register_wagon("blackwagon", "steam",{textures = {"black.png"}})
 advtrains.register_wagon("bluewagon", "steam",{textures = {"blue.png"}})

wagons.lua~

@@ -0,0 +1,406 @@
+--atan2 counts angles clockwise, minetest does counterclockwise
+local print=function(t) minetest.log("action", t) minetest.chat_send_all(t) end
+
+local wagon={
+	collisionbox = {-0.5,-0.5,-0.5, 0.5,0.5,0.5},
+	--physical = true,
+	visual = "mesh",
+	mesh = "wagon.b3d",
+	visual_size = {x=3, y=3},
+	textures = {"black.png"},
+	is_wagon=true,
+	wagon_span=1,--how many index units of space does this wagon consume
+	attach_offset={x=0, y=0, z=0},
+	view_offset={x=0, y=0, z=0},
+}
+
+
+
+function wagon:on_rightclick(clicker)
+	print("[advtrains] wagon rightclick")
+	if not clicker or not clicker:is_player() then
+		return
+	end
+	if not self.initialized then
+		print("[advtrains] not initiaalized")
+		return
+	end
+	if clicker:get_player_control().sneak then
+		advtrains.split_train_at_wagon(self)
+		return
+	end
+	if clicker:get_player_control().aux1 then
+		--advtrains.dumppath(self:train().path)
+		--minetest.chat_send_all("at index "..(self:train().index or "nil"))
+		--advtrains.invert_train(self.train_id)
+		minetest.chat_send_all(dump(self:train()))
+		return
+	end	
+	if self.driver and clicker == self.driver then
+		advtrains.player_to_wagon_mapping[self.driver:get_player_name()]=nil
+		advtrains.set_trainhud(self.driver:get_player_name(), "")
+		self.driver = nil
+		self.driver_name = nil
+		clicker:set_detach()
+		clicker:set_eye_offset({x=0,y=0,z=0}, {x=0,y=0,z=0})
+	elseif not self.driver then
+		self.driver = clicker
+		advtrains.player_to_wagon_mapping[clicker:get_player_name()]=self
+		clicker:set_attach(self.object, "", self.attach_offset, {x=0,y=0,z=0})
+		clicker:set_eye_offset(self.view_offset, self.view_offset)
+	end
+end
+
+function wagon:train()
+	return advtrains.trains[self.train_id]
+end
+
+function wagon:on_activate(staticdata, dtime_s)
+	--print("[advtrains][wagon "..(self.unique_id or "no-id").."] activated")
+	self.object:set_armor_groups({immortal=1})
+	if staticdata then
+		local tmp = minetest.deserialize(staticdata)
+		if tmp then
+			self.unique_id=tmp.unique_id
+			self.train_id=tmp.train_id
+			self.wagon_flipped=tmp.wagon_flipped
+		end
+
+	end
+	self.old_pos = self.object:getpos()
+	self.old_velocity = self.velocity
+	self.initialized_pre=true
+	self.entity_name=self.name
+	
+	--same code is in on_step
+	--does this object already have an ID?
+	if not self.unique_id then
+		self.unique_id=os.time()..os.clock()--should be random enough.
+	else
+		for _,wagon in pairs(minetest.luaentities) do
+			if wagon.is_wagon and wagon.initialized and wagon.unique_id==self.unique_id then--i am a duplicate!
+				self.object:remove()
+				return
+			end
+		end
+	end
+	--is my train still here
+	if not self.train_id or not self:train() then
+		if self.initialized then
+			print("[advtrains][wagon "..self.unique_id.."] missing train_id, destroying")
+			self.object:remove()
+			return
+		end
+		print("[advtrains][wagon "..self.unique_id.."] missing train_id, but not yet initialized, returning")
+		return
+	elseif not self.initialized then
+		self.initialized=true
+	end
+	advtrains.update_trainpart_properties(self.train_id)
+end
+
+function wagon:get_staticdata()
+	--save to table before being unloaded
+	advtrains.wagon_save[self.unique_id]=advtrains.merge_tables(self)
+	return minetest.serialize({
+		unique_id=self.unique_id,
+		train_id=self.train_id,
+		wagon_flipped=self.wagon_flipped,
+	})
+end
+
+-- Remove the wagon
+function wagon:on_punch(puncher, time_from_last_punch, tool_capabilities, direction)
+	if not puncher or not puncher:is_player() then
+		return
+	end
+
+		self.object:remove()
+		if not self.initialized then return end
+		
+		local inv = puncher:get_inventory()
+		if minetest.setting_getbool("creative_mode") then
+			if not inv:contains_item("main", "advtrains:locomotive") then
+				inv:add_item("main", "advtrains:locomotive")
+			end
+		else
+			inv:add_item("main", "advtrains:locomotive")
+		end
+		
+		table.remove(self:train().trainparts, self.pos_in_trainparts)
+		advtrains.update_trainpart_properties(self.train_id)
+		advtrains.wagon_save[self.unique_id]=nil
+		if self.discouple then self.discouple.object:remove() end--will have no effect on unloaded objects
+		return
+
+
+end
+
+function wagon:on_step(dtime)
+	local t=os.clock()
+	local pos = self.object:getpos()
+	if not self.initialized_pre then 
+		print("[advtrains] wagon stepping while not yet initialized_pre, returning")
+		self.object:setvelocity({x=0,y=0,z=0})
+		return
+	end
+	
+	self.entity_name=self.name
+	--does this object already have an ID?
+	if not self.unique_id then
+		self.unique_id=os.time()..os.clock()--should be random enough.
+	end
+	--is my train still here
+	if not self.train_id or not self:train() then
+		print("[advtrains][wagon "..self.unique_id.."] missing train_id, destroying")
+		self.object:remove()
+		return
+	elseif not self.initialized then
+		self.initialized=true
+	end
+	
+	--re-attach driver if he got lost
+	if not self.driver and self.driver_name then
+		local clicker=minetest.get_player_by_name(self.driver_name)
+		if clicker then
+			self.driver = clicker
+			advtrains.player_to_wagon_mapping[clicker:get_player_name()]=self
+			clicker:set_attach(self.object, "", self.attach_offset, {x=0,y=0,z=0})
+			clicker:set_eye_offset(self.view_offset, self.view_offset)
+		end
+	end
+	
+	--driver control
+	if self.driver and self.is_locomotive then
+		if self.driver:get_player_control_bits()~=self.old_player_control_bits then
+			local pc=self.driver:get_player_control()
+			if pc.sneak then --stop
+				self:train().tarvelocity=0
+			elseif (not self.wagon_flipped and pc.up) or (self.wagon_flipped and pc.down) then --faster
+				self:train().tarvelocity=math.min(self:train().tarvelocity+1, advtrains.all_traintypes[self:train().traintype].max_speed or 10)
+			elseif (not self.wagon_flipped and pc.down) or (self.wagon_flipped and pc.up) then --slower
+				self:train().tarvelocity=math.max(self:train().tarvelocity-1, -(advtrains.all_traintypes[self:train().traintype].max_speed or 10))
+			elseif pc.aux1 then --slower
+				if true or math.abs(self:train().velocity)<=3 then--TODO debug
+					advtrains.player_to_wagon_mapping[self.driver:get_player_name()]=nil
+					self.driver:set_detach()
+					self.driver:set_eye_offset({x=0,y=0,z=0}, {x=0,y=0,z=0})
+					advtrains.set_trainhud(self.driver:get_player_name(), "")
+					self.driver = nil
+					self.driver_name = nil
+					return--(don't let it crash because of statement below)
+				else
+					minetest.chat_send_player(self.driver:get_player_name(), "Can't get off driving train!")
+				end
+			end
+			self.old_player_control_bits=self.driver:get_player_control_bits()
+		end
+		advtrains.set_trainhud(self.driver:get_player_name(), advtrains.hud_train_format(self:train(), self.wagon_flipped))
+	end
+	
+	local gp=self:train()
+	
+	--DisCouple
+	if self.pos_in_trainparts and self.pos_in_trainparts>1 then
+		if gp.velocity==0 then
+			if not self.discouple or not self.discouple.object:getyaw() then
+				local object=minetest.add_entity(pos, "advtrains:discouple")
+				if object then
+					local le=object:get_luaentity()
+					le.wagon=self
+					--box is hidden when attached, so unuseful.
+					--object:set_attach(self.object, "", {x=0, y=0, z=self.wagon_span*10}, {x=0, y=0, z=0})
+					self.discouple=le
+				else
+					print("Couldn't spawn DisCouple")
+				end
+			end
+		else
+			if self.discouple and self.discouple.object:getyaw() then
+				self.discouple.object:remove()
+			end
+		end
+	end
+	--for path to be available. if not, skip step
+	if not advtrains.get_or_create_path(self.train_id, gp) then
+		self.object:setvelocity({x=0, y=0, z=0})
+		return
+	end
+	
+	local index=advtrains.get_real_path_index(self:train(), self.pos_in_train)
+	--print("trainindex "..gp.index.." wagonindex "..index)
+	
+	--position recalculation
+	local first_pos=gp.path[math.floor(index)]
+	local second_pos=gp.path[math.floor(index)+1]
+	if not first_pos or not second_pos then
+		--print("[advtrains] object "..self.unique_id.." path end reached!")
+		self.object:setvelocity({x=0,y=0,z=0})
+		return
+	end
+	
+	--checking for environment collisions(a 3x3 cube around the center)
+	if not gp.recently_collided_with_env then
+		local collides=false
+		for x=-1,1 do
+			for y=0,2 do
+				for z=-1,1 do
+					local node=minetest.get_node_or_nil(vector.add(first_pos, {x=x, y=y, z=z}))
+					if node and minetest.registered_nodes[node.name] and minetest.registered_nodes[node.name].walkable then
+						collides=true
+					end
+				end
+			end
+		end
+		if collides then
+			gp.recently_collided_with_env=true
+			gp.velocity=-0.5*gp.velocity
+			gp.tarvelocity=0
+		end
+	end
+	
+	local velocity=gp.velocity/(gp.path_dist[math.floor(gp.index)] or 1)
+	local factor=index-math.floor(index)
+	local actual_pos={x=first_pos.x-(first_pos.x-second_pos.x)*factor, y=first_pos.y-(first_pos.y-second_pos.y)*factor, z=first_pos.z-(first_pos.z-second_pos.z)*factor,}
+	local velocityvec={x=(first_pos.x-second_pos.x)*velocity*-1, z=(first_pos.z-second_pos.z)*velocity*-1, y=(first_pos.y-second_pos.y)*velocity*-1}
+	
+	--some additional positions to determine orientation
+	local aposfwd=gp.path[math.floor(index+2)]
+	local aposbwd=gp.path[math.floor(index-1)]
+	
+	local yaw
+	if aposfwd and aposbwd then
+		yaw=advtrains.get_wagon_yaw(aposfwd, second_pos, first_pos, aposbwd, factor)+math.pi--TODO remove when cleaning up
+	else
+		yaw=math.atan2((first_pos.x-second_pos.x), (second_pos.z-first_pos.z))
+	end
+	if self.wagon_flipped then
+		yaw=yaw+math.pi
+	end
+	
+	self.updatepct_timer=(self.updatepct_timer or 0)-dtime
+	if not self.old_velocity_vector or not vector.equals(velocityvec, self.old_velocity_vector) or self.old_yaw~=yaw or self.updatepct_timer<=0 then--only send update packet if something changed
+		self.object:setpos(actual_pos)
+		self.object:setvelocity(velocityvec)
+		self.object:setyaw(yaw)
+		self.updatepct_timer=2
+		if self.update_animation then
+			self:update_animation(gp.velocity)
+		end
+	end
+	
+	self.old_velocity_vector=velocityvec
+	self.old_yaw=yaw
+	printbm("wagon step", t)
+end
+
+function advtrains.get_real_path_index(train, pit)
+	local pos_in_train_left=pit
+	local index=train.index
+	if pos_in_train_left>(index-math.floor(index))*(train.path_dist[math.floor(index)] or 1) then
+		pos_in_train_left=pos_in_train_left - (index-math.floor(index))*(train.path_dist[math.floor(index)] or 1)
+		index=math.floor(index)
+		while pos_in_train_left>(train.path_dist[index-1] or 1) do
+			pos_in_train_left=pos_in_train_left - (train.path_dist[index-1] or 1)
+			index=index-1
+		end
+		index=index-(pos_in_train_left/(train.path_dist[index-1] or 1))
+	else
+		index=index-(pos_in_train_left*(train.path_dist[math.floor(index-1)] or 1))
+	end
+	return index
+end
+
+
+function advtrains.register_wagon(sysname, traintype, prototype)
+	setmetatable(prototype, {__index=wagon})
+	minetest.register_entity("advtrains:"..sysname,prototype)
+	
+	minetest.register_craftitem("advtrains:"..sysname, {
+		description = sysname,
+		inventory_image = prototype.textures[1],
+		wield_image = prototype.textures[1],
+		stack_max = 1,
+		
+		on_place = function(itemstack, placer, pointed_thing)
+			if not pointed_thing.type == "node" then
+				return
+			end
+			local le=minetest.env:add_entity(pointed_thing.under, "advtrains:"..sysname):get_luaentity()
+			
+			local node=minetest.env:get_node_or_nil(pointed_thing.under)
+			if not node then print("[advtrains]Ignore at placer position") return itemstack end
+			local nodename=node.name
+			if(not advtrains.is_track_and_drives_on(nodename, advtrains.all_traintypes[traintype].drives_on)) then
+				print("[advtrains]no trck here, not placing.")
+				return itemstack
+			end
+			local conn1=advtrains.get_track_connections(node.name, node.param2)
+			local id=advtrains.create_new_train_at(pointed_thing.under, advtrains.dirCoordSet(pointed_thing.under, conn1), traintype)
+			advtrains.add_wagon_to_train(le, id)
+			print(dump(advtrains.trains))
+			if not minetest.setting_getbool("creative_mode") then
+				itemstack:take_item()
+			end
+			return itemstack
+			
+		end,
+	})
+end
+advtrains.register_train_type("steam", {"regular"})
+
+--[[advtrains.register_wagon("blackwagon", "steam",{textures = {"black.png"}})
+advtrains.register_wagon("bluewagon", "steam",{textures = {"blue.png"}})
+advtrains.register_wagon("greenwagon", "steam",{textures = {"green.png"}})
+advtrains.register_wagon("redwagon", "steam",{textures = {"red.png"}})
+advtrains.register_wagon("yellowwagon", "steam",{textures = {"yellow.png"}})
+]]
+
+--[[
+	wagons can define update_animation(self, velocity) if they have a speed-dependent animation
+	this function will be called when the velocity vector changes or every 2 seconds.
+]]
+advtrains.register_wagon("newlocomotive", "steam",{
+	mesh="newlocomotive.b3d",
+	textures = {"advtrains_newlocomotive.png"},
+	is_locomotive=true,
+	attach_offset={x=5, y=10, z=-10},
+	view_offset={x=0, y=6, z=0},
+	visual_size = {x=1, y=1},
+	wagon_span=1.85,
+	collisionbox = {-1.0,-0.5,-1.0, 1.0,2.5,1.0},
+	update_animation=function(self, velocity)
+		if self.old_anim_velocity~=advtrains.abs_ceil(velocity) then
+			self.object:set_animation({x=1,y=60}, math.floor(velocity))
+			self.old_anim_velocity=advtrains.abs_ceil(velocity)
+		end
+	end
+})
+advtrains.register_wagon("wagon_default", "steam",{
+	mesh="wagon.b3d",
+	textures = {"advtrains_wagon.png"},
+	attach_offset={x=0, y=10, z=0},
+	view_offset={x=0, y=6, z=0},
+	visual_size = {x=1, y=1},
+	wagon_span=1.8,
+	collisionbox = {-1.0,-0.5,-1.0, 1.0,2.5,1.0},
+})
+
+--[[
+advtrains.register_wagon("wagontype1",{on_rightclick=function(self, clicker)
+	if clicker:get_player_control().sneak then
+		advtrains.disconnect_train_before_wagon(self)
+		return
+	end
+	--just debugging. look for first active wagon and attach to it.
+	for _,v in pairs(minetest.luaentities) do
+		if v.is_wagon and v.unique_id and v.unique_id~=self.unique_id then
+			self.train_id=v.unique_id
+		end
+	end
+	if not self.train_id then minetest.chat_send_all("not found") return end
+	minetest.chat_send_all(self.train_id.." found and attached.")
+end})
+]]
+
+