built on 01/08/2021 11:00:22

README.md

@@ -7,6 +7,7 @@ This modpack includes:
 - techage: The main mod
 - ta4_jetpack: A Jetpack for techage with hydrogen as fuel and TA4 recipe
 - ta4_paraglider: A Paraglider for techage with TA4 recipe
+- ta4_addons: A Touchscreen like the TA4 display, but with additional commands and features
 - autobahn: Street blocks and slopes with stripes for faster traveling (the only need of bitumen from techage)
 - compost: The garden soil is needed for the TA4 LED Grow Light based flower bed
 - signs_bot: For many automation tasks in TA3/TA4 like farming, mining, and item transportation
@@ -19,6 +20,7 @@ This modpack includes:
 - doc: Ingame documentation mod, used for minecart and signs_bot
 - unified_inventory V1: Player's inventory with crafting guide, bags, and more.
 - tubelib2: Necessary library
+- networks: Necessary library
 - safer_lua: Necessary library
 - lcdlib: Necessary library
 - datastorage: Necessary library
@@ -45,6 +47,23 @@ ta4_jetpack requires the modpack 3d_armor. 3d_armor is itself a modpack and can'
 ### History
 
 
+#### 2021-08-01
+
+Added Mods:
+- networks
+- ta4_addons (Touchscreen)
+
+Changed Mods:
+- techage (see readme and constuction board)
+- minecart (see readme "Migration to v2")
+
+Updated Mods:
+- autobahn
+- signs_bot
+- hyperloop
+- ta4_jetpack
+
+
 #### 2021-05-14
 
 Updated Mods:

autobahn/README.md

@@ -10,7 +10,7 @@ default
 Optional: moreblocks, techage, minecart
 
 # License
-Copyright (C) 2017-2020 Joachim Stolberg  
+Copyright (C) 2017-2021 Joachim Stolberg
 Code: Licensed under the GNU GPL version 3 or later. See LICENSE.txt  
 Textures: CC BY-SA 3.0
 

autobahn/init.lua

@@ -2,7 +2,7 @@
 
 	Autobahn
 
-	Copyright (C) 2017-2020 Joachim Stolberg
+	Copyright (C) 2017-2021 Joachim Stolberg
 	GPL v3
 	See LICENSE.txt for more information
 
@@ -17,6 +17,9 @@ local S = minetest.get_translator("autobahn")
 
 autobahn = {}
 
+-- Test for MT 5.4 new string mode
+autobahn.CLIP = minetest.features.use_texture_alpha_string_modes and "clip" or true
+
 local Facedir2Dir = {[0] = 
 	{x=0,  y=0,  z=1},
 	{x=1,  y=0,  z=0},
@@ -237,6 +240,7 @@ local function register_node(name, tiles, drawtype, mesh, box, drop)
 		paramtype = "light",
 		paramtype2 = "facedir",
 		sunlight_propagates = true,
+		use_texture_alpha = autobahn.CLIP,
 		sounds = default.node_sound_stone_defaults(),
 		is_ground_content = false,
 		groups = {cracky=2, crumbly=2, 
@@ -332,8 +336,7 @@ if minetest.global_exists("techage") then
 		},
 		replacements = {{"techage:ta3_barrel_bitumen", "techage:ta3_barrel_empty"}},
 	})
-end
+elseif minetest.global_exists("moreblocks") then
-if minetest.global_exists("moreblocks") then
 	minetest.register_craft({
 		output = "autobahn:node1 4",
 		recipe = {

hyperloop/booking_node.lua

@@ -308,6 +308,7 @@ minetest.register_node("hyperloop:booking_ground", {
 
 	on_receive_fields = on_receive_fields,
 	on_destruct = on_destruct,
+	on_rightclick = on_rightclick,
 	
 	on_rotate = screwdriver.disallow,	
 	drop = "hyperloop:booking",

hyperloop/elevator.lua

@@ -266,23 +266,36 @@ minetest.register_node("hyperloop:shaftA2", {
 
 -- Form spec for the floor list
 local function formspec(pos, lFloors)
-	local tRes = {"size[5,10]label[0.5,0; "..S("Select your destination").."]"}
+	local tRes = {"size[6,10]label[0.5,0; "..S("Select your destination").."]"}
-	tRes[2] = "label[1,0.6;"..S("Destination").."]label[2.5,0.6;"..S("Floor").."]"
+	tRes[2] = "label[0.5,0.6;"..S("Destination").."]label[2,0.6;"..S("Floor").."]"
+	if #lFloors == 0 then
+		tRes[#tRes+1] = "button_exit[1,3;3,1;button;Update]"
+	elseif #lFloors < 10 then
 		for idx,floor in ipairs(lFloors) do
-		if idx >= 12 then
-			break
-		end
 			local ypos = 0.5 + idx*0.8
 			local ypos2 = ypos - 0.2
-		tRes[#tRes+1] = "button_exit[1,"..ypos2..";1,1;button;"..(#lFloors-idx).."]"
+			tRes[#tRes+1] = "button_exit[0.5,"..ypos2..";1,1;button;"..(#lFloors-idx).."]"
 			if vector.equals(floor.pos, pos) then
-			tRes[#tRes+1] = "label[2.5,"..ypos..";"..S("(current position)").."]"
+				tRes[#tRes+1] = "label[2,"..ypos..";"..S("(current position)").."]"
 			else
-			tRes[#tRes+1] = "label[2.5,"..ypos..";"..(floor.name or "<unknown>").."]"
+				tRes[#tRes+1] = "label[2,"..ypos..";"..(floor.name or "<unknown>").."]"
 			end
 		end
-	if #tRes == 2 then
+	else
-		tRes[#tRes+1] = "button_exit[1,3;3,1;button;Update]"
+		tRes[3] = "scrollbaroptions[smallstep=100;largestep=200]"
+		tRes[4] = "scrollbar[5.3,1.5;0.4,8.2;vertical;floors;0]"
+		tRes[5] = "scroll_container[0.5,2;5,9.5;floors;vertical;0.02]"
+		for idx,floor in ipairs(lFloors) do
+			local ypos = idx*0.8 - 0.5
+			local ypos2 = ypos - 0.2
+			tRes[#tRes+1] = "button_exit[0,"..ypos2..";1,1;button;"..(#lFloors-idx).."]"
+			if vector.equals(floor.pos, pos) then
+				tRes[#tRes+1] = "label[1.5,"..ypos..";"..S("(current position)").."]"
+			else
+				tRes[#tRes+1] = "label[1.5,"..ypos..";"..(floor.name or "<unknown>").."]"
+			end
+		end
+		tRes[#tRes+1] = "scroll_container_end[]"
 	end
 	return table.concat(tRes)
 end

hyperloop/network.lua

@@ -69,6 +69,7 @@ local function get_stations(tStations, sKey, tRes)
 		if not tRes[dest] then
 			-- Known station?
 			if tStations[dest] then
+				tStations[dest].name = tStations[dest].name or ""
 				tRes[dest] = tStations[dest]
 				get_stations(tStations, dest, tRes)
 			end
@@ -143,7 +144,7 @@ function Network:set(pos, name, tAttr)
 				conn = {},
 			}
 		end
-		self.tStations[sKey].name = name
+		self.tStations[sKey].name = name or ""
 		for k,v in pairs(tAttr) do
 			self.tStations[sKey][k] = v
 		end

minecart/api.lua

@@ -16,27 +16,23 @@
 
 -- 'pos' is the position of the puncher/sensor, the cart
 -- position will be determined by means of 'param2' and 'radius'
+
+-- Function returns true for all standing carts (entities and nodes)
 function minecart.is_cart_available(pos, param2, radius)
-	local pos2 = minecart.get_nodecart_nearby(pos, param2, radius)	
+	return minecart.get_nodecart_nearby(pos, param2, radius) ~= nil or
-	if pos2 then
+		minecart.get_entitycart_nearby(pos, param2, radius) ~= nil
-		return true
-	end
-	-- The entity check is needed for a cart with driver
-	local entity = minecart.get_entitycart_nearby(pos, param2, radius)
-	if entity then
-		return true
-	end
 end	
 
+-- Function returns true if a standing cart as node is avaliable
 function minecart.is_nodecart_available(pos, param2, radius)
-	local pos2 = minecart.get_nodecart_nearby(pos, param2, radius)	
+	return minecart.get_nodecart_nearby(pos, param2, radius) ~= nil
-	if pos2 then
+end	
-		return true
+
-	end
+-- Function returns true if a standing cart as entity is avaliable
+function minecart.is_entitycart_available(pos, param2, radius)
+	return minecart.get_entitycart_nearby(pos, param2, radius) ~= nil
 end	
 
--- 'pos' is the position of the puncher/sensor, the cart
--- position will be determined by means of 'param2' and 'radius'
 function minecart.punch_cart(pos, param2, radius, punch_dir)
 	local pos2, node = minecart.get_nodecart_nearby(pos, param2, radius)	
 	if pos2 then

minecart/baselib.lua

@@ -75,7 +75,8 @@ function minecart.find_node_near_lvm(pos, radius, items)
 		for y = pos1.y, pos2.y do
 			for z = pos1.z, pos2.z do
 				local idx = area:indexp({x = x, y = y, z = z})
-				if minetest.get_name_from_content_id(data[idx]) then
+				local name = minetest.get_name_from_content_id(data[idx])
+				if name and tItems[name] then
 					return {x = x, y = y, z = z}
 				end
 			end
@@ -96,7 +97,7 @@ function minecart.set_marker(pos, text, size, ttl)
 	end
 end
 
-minetest.register_entity(":minecart:marker_cube", {
+minetest.register_entity("minecart:marker_cube", {
 	initial_properties = {
 		visual = "cube",
 		textures = {
@@ -118,6 +119,41 @@ minetest.register_entity(":minecart:marker_cube", {
 	end,
 })
 
+function minecart.set_land_marker(pos, radius, ttl)
+	local offs = radius + 0.5
+	local posses = {
+		{x = pos.x + offs, y = pos.y, z=pos.z},
+		{x = pos.x, y = pos.y, z=pos.z + offs},
+		{x = pos.x - offs, y = pos.y, z=pos.z},
+		{x = pos.x, y = pos.y, z=pos.z - offs},
+	}
+	for i, pos in ipairs(posses) do
+		local marker = minetest.add_entity(pos, "minecart:marker")
+		if marker ~= nil then
+			marker:set_properties({
+				visual_size = {x = 2 * offs, y = 2 * offs},
+				collisionbox = {-offs, -offs, 0, offs, offs, 0},
+			})
+			marker:set_yaw(math.pi / 2 * i)
+			minetest.after(ttl, marker.remove, marker)
+		end
+	end
+end
+
+minetest.register_entity("minecart:marker", {
+	initial_properties = {
+		visual = "upright_sprite",   
+		textures = {"minecart_marker_cube.png"},
+		use_texture_alpha = true,     
+		physical = false,
+		glow = 12,
+		static_save = false,
+	},
+	on_punch = function(self)
+		self.object:remove()
+	end,
+})
+
 function minecart.is_air_like(name)
 	local ndef = minetest.registered_nodes[name]
 	if ndef and ndef.buildable_to then
@@ -270,12 +306,12 @@ function minecart.add_entitycart(pos, node_name, entity_name, vel, cargo, owner,
 	end
 end
 
-function minecart.start_entitycart(self, pos)
+function minecart.start_entitycart(self, pos, facedir)
 	local route = {}
 	
 	self.is_running = true
 	self.arrival_time = 0
-	self.start_pos = minecart.get_buffer_pos(pos, self.owner)
+	self.start_pos = minecart.get_buffer_pos(pos, self.owner) or minecart.get_next_buffer(pos, facedir)
 	if self.start_pos then
 		-- Read buffer route for the junction info
 		route = minecart.get_route(self.start_pos) or {}

minecart/entitylib.lua

@@ -13,6 +13,8 @@
 local P2S = function(pos) if pos then return minetest.pos_to_string(pos) end end
 local P2H = minetest.hash_node_position
 local H2P = minetest.get_position_from_hash
+local LEN = function(t) local c = 0; for _ in pairs(t) do c = c + 1 end; return c; end
+
 local MAX_SPEED = minecart.MAX_SPEED
 local dot2dir = minecart.dot2dir
 local get_waypoint = minecart.get_waypoint
@@ -71,7 +73,14 @@ local function running(self)
 	local dir = minetest.yaw_to_dir(rot.y)
 	dir.y = math.floor((rot.x / (math.pi/4)) + 0.5)
 	dir = vector.round(dir)
-	local facedir = minetest.dir_to_facedir(dir)
+	-- If running in a 45 degree direction (extra cycle), use the old dir
+	-- to calculate face_dir. Otherwise the junction detection will not work as expected.
+	local facedir
+	if self.waypoint and self.waypoint.old_dir then
+		facedir = minetest.dir_to_facedir(self.waypoint.old_dir)
+	else
+		facedir = minetest.dir_to_facedir(dir)
+	end
 	local cart_pos, wayp_pos, is_junction
 	
 	if self.reenter then -- through monitoring
@@ -115,7 +124,7 @@ local function running(self)
 		self.ctrl = nil
 	end
 	
-	--print("dist", P2S(cart_pos), P2S(self.waypoint.pos), P2S(self.waypoint.cart_pos), self.waypoint.dot)
+	--print("running", LEN(self.junctions))
 	local dist = vector.distance(cart_pos, self.waypoint.cart_pos or self.waypoint.pos)
 	local new_dir = dot2dir(self.waypoint.dot)
 	local new_speed = new_speed(self, new_dir)
@@ -129,7 +138,7 @@ local function running(self)
 	local new_cart_pos, extra_cycle = minecart.get_current_cart_pos_correction(
 			wayp_pos, facedir, dir.y, self.waypoint.dot)  -- TODO: Why has self.waypoint no dot?
 	if extra_cycle and not vector.equals(cart_pos, new_cart_pos) then
-		self.waypoint = {pos = wayp_pos, cart_pos = new_cart_pos}
+		self.waypoint = {pos = wayp_pos, cart_pos = new_cart_pos, old_dir = vector.new(dir)}
 		new_dir = vector.direction(cart_pos, new_cart_pos)
 		dist = vector.distance(cart_pos, new_cart_pos)
 		--print("extra_cycle", P2S(cart_pos), P2S(wayp_pos), P2S(new_cart_pos), new_speed)
@@ -174,7 +183,7 @@ local function play_sound(self)
 		self.sound_handle = minetest.sound_play(
 			"carts_cart_moving", {
 			object = self.object,
-			gain = self.curr_speed / MAX_SPEED,
+			gain = (self.curr_speed or 0) / MAX_SPEED,
 		})
 	end
 end
@@ -243,9 +252,11 @@ local function on_entitycard_punch(self, puncher, time_from_last_punch, tool_cap
 			local pos = vector.round(self.object:get_pos())
 			if puncher then
 				local yaw = puncher:get_look_horizontal()
+				dir = minetest.yaw_to_dir(yaw)
 				self.object:set_rotation({x = 0, y = yaw, z = 0})
 			end
-			minecart.start_entitycart(self, pos)
+			local facedir = minetest.dir_to_facedir(dir or {x=0, y=0, z=0})
+			minecart.start_entitycart(self, pos, facedir or 0)
 			minecart.start_recording(self, pos) 
 		end
 	end

minecart/locale/minecart.de.tr

@@ -2,7 +2,6 @@
 Station name=Stationsname
 Waiting time/sec=Wartezeit/s
 connected to=verbunden mit
-Minecart Railway Buffer=Minecart Prellbock
 Summary=Zusammenfassung
 1. Place your rails and build a route with two endpoints. Junctions are allowed as long as each route has its own start and endpoint.=1. Baue eine Schienenstrecke mit zwei Enden. Kreuzungen sind zulässig, solange jede Route ihre eigenen Start- und Endpunkte hat.
 2. Place a Railway Buffer at both endpoints (buffers are always needed, they store the route and timing information).=2. Platziere einen Prellbock an beide Schienenenden (Prellböcke sind zwingend notwendig, sie speichern die Routen- und Zeit-Informationen).
@@ -26,7 +25,10 @@ Minecart Cart=Wagen
 Minecart Speed Signs=Geschwindigkeitsbegrenzungszeichen
 If several carts are running on one route,@nit can happen that a buffer position is already occupied and one cart therefore stops earlier.@nIn this case, the cart pusher is used to push the cart towards the buffer again.@nThis block must be placed under the rail at a distance of 2 m in front of the buffer.=Wenn mehrere Wagen auf einer Route fahren, kann es vorkommen,@ndass eine Prellbock Position bereits belegt ist und ein Wagen daher früher anhält.@nDer Cart Anschieber dient in diesem Fall dazu, die Wagen wieder in Richtung Prellbock anzuschieben.@nDieser Block muss unter der Schiene mit 2 m Abstand vor dem Prellbock platziert werden.
 Limit the cart speed with speed limit signs.@n@nAs before, the speed of the carts is also influenced by power rails.@nBrake rails are irrelevant, the cart does not brake here.@nThe maximum speed is 8 m/s. This assumes a ratio of power rails@nto normal rails of 1 to 4 on a flat section of rail. A rail section is a@nseries of rail nodes without a change of direction. After every curve / kink,@nthe speed for the next section of the route is newly determined,@ntaking into account the swing of the cart. This means that a cart can@nroll over short rail sections without power rails.@n@nIn order to additionally brake the cart at certain points@n(at switches or in front of a buffer), speed limit signs can be placed@non the track. With these signs the speed can be reduced to 4, 2, or 1 m / s.@nThe "No speed limit" sign can be used to remove the speed limit.@n@nThe speed limit signs must be placed next to the track so that they can@nbe read from the cart. This allows different speeds in each direction of travel.=Begrenze die Geschwindigkeit der Wagen mit Geschwindigkeitsbegrenzungszeichen@n@nDie Geschwindigkeit der Carts wird wie bisher auch über "power rails" beeinflusst. "Brake rails" sind ohne Bedeutung, das Cart bremst hier nicht. Die maximale Geschwindigkeit beträgt 8 m/s. Dies setzt eine Verhältnis von "power rails" zu "normal rails" von 1 zu 4 auf einem ebenen Streckenabschnitt voraus. Ein Streckenabschnitt ist dabei ein Reihe von Schienenblöcken ohne Richtungsänderung. Nach jeder Kurve/Knick wird die Geschwindigkeit für den nächsten Streckenabschnitt neu bestimmt, wobei hier der Schwung des Carts mit berücksichtigt wird. So kann ein Cart auch über kurze Streckenabschnitt ohne "power rails" rollen.@n@nUm das Cart zusätzlich an bestimmten Stellen abzubremsen (an Weichen oder vor einen Puffer), können Geschwindigkeitsbegrenzungszeichen an der Strecke platziert werden. Durch diese Zeichen kann die Geschwindigkeit auf 4, 2, oder 1 m/s reduziert werden. Durch das Aufhebungszeichen kann die Geschwindigkeitsbegrenzung wieder aufgehoben werden.@n@nDie Geschwindigkeitsbegrenzungszeichen müssen so neben die Strecke platziert werden, dass sie vom Cart ablesbar sind. Dies erlaubt damit unterschiedliche Geschwindigkeiten pro Fahrtrichtung.
+Minecart Railway Buffer=Minecart Prellbock
 Minecart Hopper=Minecart Hopper
+Minecart Landmark=Minecart Meilenstein
+Cart Pusher=Wagen Anschieber
 Minecart (Sneak+Click to pick up)=Minecart (Shift+Klick zum Entfernen des Carts)
 Output cart state and position, or a list of carts, if no cart number is given.=Gibt Status und Position des Wagens, oder eine Liste aller Wagen aus, wenn keine Wagennummer angegeben ist.
 List of carts=Liste aller Wagen
@@ -34,8 +36,6 @@ Enter cart number=Gebe Cart Nummer ein
 Save=Speichern
 [minecart] Area is protected!=[minecart] Bereich ist geschützt!
 Allow to dig/place rails in Minecart Landmark areas=Erlaubt dir, Schienen in Meilensteinbereichen zu setzen/zu entfernen
-Minecart Landmark=Minecart Meilenstein
-Cart Pusher=Wagen Anschieber
 left=links
 right=rechts
 straight=geradeaus
@@ -45,6 +45,7 @@ next junction=nächste Weiche
 Travel time=Fahrzeit
 [minecart] Route stored!=[minecart] Strecke gespeichert
 [minecart] Speed @= %u m/s, Time @= %u s, Route length @= %u m=[minecart] Geschw. @= %u m/s, Zeit @= %u s, Routenlänge @= %u m
+[minecart] Your route is too short to record!=[minecart] Deine Strecke ist zu kurz für eine Aufzeichnung!
 Speed "1"=Tempo "1"
 Speed "2"=Tempo "2"
 Speed "4"=Tempo "4"

minecart/locale/template.txt

@@ -2,7 +2,6 @@
 Station name=
 Waiting time/sec=
 connected to=
-Minecart Railway Buffer=
 Summary=
 1. Place your rails and build a route with two endpoints. Junctions are allowed as long as each route has its own start and endpoint.=
 2. Place a Railway Buffer at both endpoints (buffers are always needed, they store the route and timing information).=
@@ -26,7 +25,10 @@ Minecart Cart=
 Minecart Speed Signs=
 If several carts are running on one route,@nit can happen that a buffer position is already occupied and one cart therefore stops earlier.@nIn this case, the cart pusher is used to push the cart towards the buffer again.@nThis block must be placed under the rail at a distance of 2 m in front of the buffer.=
 Limit the cart speed with speed limit signs.@n@nAs before, the speed of the carts is also influenced by power rails.@nBrake rails are irrelevant, the cart does not brake here.@nThe maximum speed is 8 m/s. This assumes a ratio of power rails@nto normal rails of 1 to 4 on a flat section of rail. A rail section is a@nseries of rail nodes without a change of direction. After every curve / kink,@nthe speed for the next section of the route is newly determined,@ntaking into account the swing of the cart. This means that a cart can@nroll over short rail sections without power rails.@n@nIn order to additionally brake the cart at certain points@n(at switches or in front of a buffer), speed limit signs can be placed@non the track. With these signs the speed can be reduced to 4, 2, or 1 m / s.@nThe "No speed limit" sign can be used to remove the speed limit.@n@nThe speed limit signs must be placed next to the track so that they can@nbe read from the cart. This allows different speeds in each direction of travel.=
+Minecart Railway Buffer=
 Minecart Hopper=
+Minecart Landmark=
+Cart Pusher=
 Minecart (Sneak+Click to pick up)=
 Output cart state and position, or a list of carts, if no cart number is given.=
 List of carts=
@@ -34,8 +36,6 @@ Enter cart number=
 Save=
 [minecart] Area is protected!=
 Allow to dig/place rails in Minecart Landmark areas=
-Minecart Landmark=
-Cart Pusher=
 left=
 right=
 straight=
@@ -45,6 +45,7 @@ next junction=
 Travel time=
 [minecart] Route stored!=
 [minecart] Speed @= %u m/s, Time @= %u s, Route length @= %u m=
+[minecart] Your route is too short to record!=
 Speed "1"=
 Speed "2"=
 Speed "4"=

minecart/nodelib.lua

@@ -30,11 +30,16 @@ function minecart.start_nodecart(pos, node_name, puncher, punch_dir)
 	local userID = M(pos):get_int("userID")
 	-- check if valid cart
 	if not minecart.monitoring_valid_cart(owner, userID, pos, node_name) then
-		--print("invalid cart", owner, userID, P2S(pos), node_name)
+		--print("Lost cart", owner, userID, P2S(pos), node_name)
+		local entity_name = minecart.tNodeNames[node_name]
+		if owner ~= "" and userID ~= "" and entity_name then
+			minecart.monitoring_add_cart(owner, userID, pos, node_name, entity_name)
+		else
 			M(pos):set_string("infotext", 
 					minetest.get_color_escape_sequence("#FFFF00") .. owner .. ": 0")
 			return
 		end
+	end
 	-- Only the owner or a noplayer can start the cart, but owner has to be online
 	if minecart.is_owner(puncher, owner) and minetest.get_player_by_name(owner) and
 			userID ~= 0 then
@@ -42,14 +47,19 @@ function minecart.start_nodecart(pos, node_name, puncher, punch_dir)
 		local obj = minecart.node_to_entity(pos, node_name, entity_name)
 		if obj then
 			local entity = obj:get_luaentity()
+			local facedir
+			
 			if puncher then
 				local yaw = puncher:get_look_horizontal()
 				entity.object:set_rotation({x = 0, y = yaw, z = 0})
+				local dir = minetest.yaw_to_dir(yaw)
+				facedir = minetest.dir_to_facedir(dir)
 			elseif punch_dir then
 				local yaw = minetest.dir_to_yaw(punch_dir)
 				entity.object:set_rotation({x = 0, y = yaw, z = 0})
+				facedir = minetest.dir_to_facedir(punch_dir)
 			end
-			 minecart.start_entitycart(entity, pos)
+			minecart.start_entitycart(entity, pos, facedir or 0)
 		end
 	end
 end

minecart/protection.lua

@@ -91,6 +91,10 @@ minetest.register_node("minecart:landmark", {
 		return false
 	end,
 	
+	on_punch = function(pos, node, puncher, pointed_thing)
+		minecart.set_land_marker(pos, RANGE, 20)
+	end,
+	
 	paramtype2 = "facedir",
 	sunlight_propagates = true,
 	groups = {cracky = 3, stone = 1},

minecart/rails.lua

@@ -424,6 +424,52 @@ function minecart.delete_waypoint(pos)
 	end
 end	
 
+-------------------------------------------------------------------------------
+-- find next buffer (needed as starting position)
+-------------------------------------------------------------------------------
+local function get_next_waypoints(pos)
+	local t = get_metadata(pos) 
+	if not t then
+		t = find_all_next_waypoints(pos)
+	end
+	return t
+end
+
+local function get_next_pos_and_facedir(waypoints, facedir)
+	local cnt = 0
+	local newpos, newfacedir
+	facedir = (facedir + 2) % 4  -- opposite dir
+	
+	for i = 0, 3 do
+		if waypoints[i] then
+			cnt = cnt + 1
+			if i ~= facedir then -- not the same way back
+				newpos = vector.new(waypoints[i].pos)
+				newfacedir = i
+			end
+		end
+	end
+	
+	-- no junction and valid facedir
+	if cnt < 3 and newfacedir then
+		return newpos, newfacedir
+	end
+end
+
+local function get_next_buffer(pos, facedir)
+	facedir = (facedir + 2) % 4  -- opposite dir
+	for i = 1,5 do  -- limit search depth
+		local waypoints = get_next_waypoints(pos) or {}
+		local pos1, facedir1 = get_next_pos_and_facedir(waypoints, facedir)
+		if pos1 then
+			pos, facedir = pos1, facedir1
+		else
+			return minecart.find_node_near_lvm(pos, 1, {"minecart:buffer"})
+		end
+	end
+end
+
+
 carts:register_rail("minecart:rail", {
 	description = "Rail",
 	tiles = {
@@ -536,13 +582,17 @@ function minecart.add_raillike_nodes(name)
 	lRailsExt[#lRailsExt + 1] = name
 end
 
+-- minecart.get_next_buffer(pos, facedir)
+minecart.get_next_buffer = get_next_buffer
+
 --minetest.register_lbm({
 --	label = "Delete waypoints",
 --	name = "minecart:del_meta",
---	nodenames = {"carts:brakerail"},
+--	nodenames = {"minecart:rail", "minecart:powerrail"},
 --	run_at_every_load = true,
 --	action = function(pos, node)
 --		del_metadata(pos)
 --	end,
 --})
 
+

minecart/recording.lua

@@ -124,6 +124,8 @@ function minecart.stop_recording(self, pos)
 				local fmt = S("[minecart] Speed = %u m/s, Time = %u s, Route length = %u m")
 				minetest.chat_send_player(self.driver, string.format(fmt, speed, self.runtime, length))
 			end
+		elseif #self.checkpoints <= 3 then
+			minetest.chat_send_player(self.driver, S("[minecart] Your route is too short to record!"))
 		end
 		dashboard_destroy(self)
 	end

minecart/storage.lua

@@ -68,7 +68,7 @@ minetest.after(10, function()
 	for owner, carts in pairs(minecart.CartsOnRail) do
 		for userID, cart in pairs(carts) do
 			-- Remove node carts that are not available anymore
-			if cart.objID == 0 or not cart.objID then
+			if cart.pos and (cart.objID == 0 or not cart.objID) then
 				local node = minecart.get_node_lvm(cart.pos)
 				if not minecart.tNodeNames[node.name] then
 					-- Mark as "to be deleted"

minecart/tool.lua

@@ -29,6 +29,16 @@ end
 
 local old_pos
 
+local function test_get_buffer(pos, player)
+	local yaw = player:get_look_horizontal()
+	local dir = minetest.yaw_to_dir(yaw)
+	local facedir = minetest.dir_to_facedir(dir)
+	local pos1 = minecart.get_next_buffer(pos, facedir)
+	if pos1 then
+		minecart.set_marker(pos1, "buffer", 1.2, 10)
+	end
+end
+
 local function test_get_route(pos, node, player)
 	local yaw = player:get_look_horizontal()
 	local dir = minetest.yaw_to_dir(yaw)
@@ -67,9 +77,8 @@ end
 local function click_left(itemstack, placer, pointed_thing)
 	if pointed_thing.type == "node" then
 		local pos = pointed_thing.under
-		local node = minetest.get_node(pos)
+		if minecart.is_rail(pos) then
-		if node.name == "carts:rail" or node.name == "carts:powerrail" then
+			test_get_buffer(pos, placer)
-			test_get_route(pos, node, placer)
 		end
 	end
 end

networks/LICENSE.txt

@@ -0,0 +1,662 @@
+                    GNU AFFERO GENERAL PUBLIC LICENSE
+                       Version 3, 19 November 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+                            Preamble
+
+  The GNU Affero General Public License is a free, copyleft license for
+software and other kinds of works, specifically designed to ensure
+cooperation with the community in the case of network server software.
+
+  The licenses for most software and other practical works are designed
+to take away your freedom to share and change the works.  By contrast,
+our General Public Licenses are intended to guarantee your freedom to
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+software for all its users.
+
+  When we speak of free software, we are referring to freedom, not
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+them if you wish), that you receive source code or can get it if you
+want it, that you can change the software or use pieces of it in new
+free programs, and that you know you can do these things.
+
+  Developers that use our General Public Licenses protect your rights
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+source code to the public.
+
+  The GNU Affero General Public License is designed specifically to
+ensure that, in such cases, the modified source code becomes available
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+provide the source code of the modified version running there to the
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+code of the modified version.
+
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+published by Affero, was designed to accomplish similar goals.  This is
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+<https://www.gnu.org/licenses/>.
+

networks/README.md

@@ -0,0 +1,124 @@
+# Networks [networks]
+
+A library to build and manage networks based on tubelib2 tubes, pipes, or cables.
+
+![networks](https://github.com/joe7575/networks/blob/main/screenshot.png)
+
+
+### Power Networks
+
+Power networks consists of following node types:
+
+- Generators, nodes providing power
+- Consumers, nodes consuming power
+- Storage nodes, nodes storing power
+- Cables, to build power connections
+- Junctions, to connect point to point connection to networks
+- Switches, to turn on/off network segments
+
+All storage nodes in a network form a storage system. Storage systems are
+required as buffers. Generators "charge" the storage system, consumers
+"discharge" the storage system.
+
+Charging the storage system follows a degressive/adaptive charging curve.
+When the storage system e.g. is 80% full, the charging load is continuously reduced.
+This ensures that all generators are loaded in a balanced manner.
+
+Cables, junctions, and switches can be hidden under blocks (plastering)
+and opened again with a tool.
+This makes power installations in buildings more realistic.
+The mod uses a whitelist for filling material. The function 
+`networks.register_filling_items` is used to register node names.
+
+
+### Liquid Networks
+
+Liquid networks consists of following node types:
+
+- Pumps, nodes pumping liquids from/to tanks
+- Tanks, storuing liquids
+- Junctions, to connect pipes to networks
+- Valves, to turn on/off pipe segments
+
+
+### Control
+
+In addition to any network the 'control' API can be used to send commands
+or request data from nodes, specified via 'node_type'.
+
+
+### Test Nodes
+
+The file `./test/test_power.lua` contains test nodes of each kind of power nodes.
+It can be used to play with the features and to study the use of `networks`.
+
+- [G] a generator, which provides 20 units of power every 2 s
+- [C] a consumer, which need 5 units of power every 2 s
+- [S] a storage with 500 units capacity
+
+All three nodes can be turned on/off by right-clicking.
+
+- cable node for power transportation
+- junction node for power distribution
+- a power switch to turn on/off consumers
+- a tool to hide/open cables and junctions
+
+The file `./test/test_liquid.lua` contains test nodes of each kind of liquid nodes.
+
+- [P] a pump which pumps 2 items every 2 s
+- [T] tree types of tanks (empty, milk, water)
+- junction node
+- a value to connect/disconnect pipes
+
+The file `./test/test_control.lua` contains server [S] and client [C] nodes
+to demonstrate simple on/off commands.
+
+All this testing nodes can be enabled via mod settings `networks_test_enabled = true` in `minetest.conf`
+
+
+
+
+### License
+
+Copyright (C) 2021 Joachim Stolberg  
+Code: Licensed under the GNU AGPL version 3 or later. See LICENSE.txt  
+Textures: CC BY-SA 3.0  
+
+
+### Dependencies
+
+Required: tubelib2
+
+
+### History
+
+**2021-05-23  V0.01**
+- First shot
+
+**2021-05-24  V0.02**
+- Add switch
+- Add tool and hide/open feature
+- bug fixes and improvements
+
+**2021-05-25  V0.03**
+- Add function `networks.get_power_data`
+- bug fixes and improvements
+
+**2021-05-29  V0.04**
+- bug fixes and improvements
+
+**2021-05-30  V0.05**
+- Change power API
+
+**2021-06-03  V0.06**
+- Add 'liquid'
+- bug fixes and improvements
+
+**2021-06-04  V0.07**
+- Add 'control' API
+
+**2021-07-06  V0.08**
+- Add 'transfer' functions to the 'power' API
+
+**2021-07-23  V0.09**
+- bug fixes and improvements

networks/control.lua

@@ -0,0 +1,80 @@
+--[[
+
+	Networks
+	========
+
+	Copyright (C) 2021 Joachim Stolberg
+
+	AGPL v3
+	See LICENSE.txt for more information
+	
+	Control API to control other network nodes which have a control interface
+
+]]--
+
+-- for lazy programmers
+local S2P = minetest.string_to_pos
+local P2S = function(pos) if pos then return minetest.pos_to_string(pos) end end
+local M = minetest.get_meta
+local N = tubelib2.get_node_lvm
+local CTL = function(pos) return (minetest.registered_nodes[N(pos).name] or {}).control end
+
+networks.control = {}
+
+-- return list of nodes {pos = ..., indir = ...} of given node_type
+local function get_network_table(pos, tlib2, outdir, node_type)
+	local netw = networks.get_network_table(pos, tlib2, outdir)
+	if netw then
+		return netw[node_type] or {}
+	end
+	return {}
+end
+
+-------------------------------------------------------------------------------
+-- For all types of nodes
+-------------------------------------------------------------------------------
+-- names: list of node names
+-- control_callbacks = {
+--	on_receive = function(pos, tlib2, topic, payload),
+--	on_request = function(pos, tlib2, topic),  -- returns: response
+-- }
+function networks.control.register_nodes(names, control_callbacks)
+	assert(type(control_callbacks) == "table")
+	
+	for _, name in ipairs(names) do
+		minetest.override_item(name, {control = control_callbacks})
+	end
+end
+
+-- Send a message with 'topic' string and any 'payload 'to all 'tlib2' network 
+-- nodes of type 'node_type'.
+-- Function returns the number of nodes the message was sent to.
+function networks.control.send(pos, tlib2, outdir, node_type, topic, payload)
+	assert(outdir and node_type and topic)
+	assert(type(topic) == "string")
+	local cnt = 0
+	for _,item in ipairs(get_network_table(pos, tlib2, outdir, node_type)) do
+		local ctl = CTL(item.pos)
+		if ctl and ctl.on_receive then
+			ctl.on_receive(item.pos, tlib2, topic, payload)
+			cnt = cnt + 1
+		end
+	end
+	return cnt
+end
+
+-- Send a request with 'topic' string to all 'tlib2' network 
+-- nodes of type 'node_type'.
+-- Function returns a list with all responses.
+function networks.control.request(pos, tlib2, outdir, node_type, topic)
+	assert(outdir and node_type and topic)
+	assert(type(topic) == "string")
+	local t = {}
+	for _,item in ipairs(get_network_table(pos, tlib2, outdir, node_type)) do
+		local ctl = CTL(item.pos)
+		if ctl and ctl.on_request then
+			t[#t + 1] = ctl.on_request(item.pos, tlib2, topic)
+		end
+	end
+	return t
+end

networks/hidden.lua

@@ -0,0 +1,166 @@
+--[[
+
+	Networks
+	========
+
+	Copyright (C) 2021 Joachim Stolberg
+
+	AGPL v3
+	See LICENSE.txt for more information
+
+]]--
+
+-- for lazy programmers
+local S2P = minetest.string_to_pos
+local P2S = function(pos) if pos then return minetest.pos_to_string(pos) end end
+local M = minetest.get_meta
+local N = tubelib2.get_node_lvm
+
+local hidden_message = ""
+local tFillingMaterial = {}
+
+-- handle old techage names
+local function legacy_names(meta)
+	if meta:contains("techage_hidden_nodename") then
+		meta:set_string("netw_name", meta:get_string("techage_hidden_nodename"))
+		meta:set_string("techage_hidden_nodename", "")
+	end
+	if meta:contains("tl2_param2") then
+		meta:set_int("netw_param2", meta:get_int("tl2_param2"))
+		meta:set_string("tl2_param2", "")
+	end
+end
+
+-------------------------------------------------------------------------------
+-- API
+-------------------------------------------------------------------------------
+function networks.hidden_name(pos)
+	local meta = M(pos)
+	legacy_names(meta)
+	if meta:contains("netw_name") then
+		return meta:get_string("netw_name")
+	end
+end
+
+function networks.get_nodename(pos)
+	local meta = M(pos)
+	legacy_names(meta)
+	if meta:contains("netw_name") then
+		return meta:get_string("netw_name")
+	end
+	return tubelib2.get_node_lvm(pos).name
+end
+
+function networks.get_node(pos)
+	local meta = M(pos)
+	legacy_names(meta)
+	if meta:contains("netw_name") then
+		return {name = meta:get_string("netw_name"), param2 = meta:get_int("netw_param2")}
+	end
+	return tubelib2.get_node_lvm(pos)
+end
+
+local get_node = networks.get_node
+local get_nodename = networks.get_nodename
+
+-- Override methods of tubelib2 to store tube/cable info as metadata,
+-- used for hidden cables/tubes/junctions/switches.
+function networks.use_metadata(tlib2)
+	tlib2.get_primary_node_param2 = function(self, pos, dir)
+		local npos = vector.add(pos, tubelib2.Dir6dToVector[dir or 0])
+		if self.primary_node_names[get_nodename(npos)] then
+			local meta = M(npos)
+			return meta:get_int("netw_param2"), npos
+		end
+	end
+	tlib2.is_primary_node = function(self, pos, dir)
+		local npos = vector.add(pos, tubelib2.Dir6dToVector[dir or 0])
+		return self.primary_node_names[get_nodename(npos)] ~= nil
+	end
+	tlib2.get_secondary_node = function(self, pos, dir)
+		local npos = vector.add(pos, tubelib2.Dir6dToVector[dir or 0])
+		local node = get_node(npos)
+		if self.secondary_node_names[node.name] then
+			return node, npos, true
+		end
+	end
+	tlib2.is_secondary_node = function(self, pos, dir)
+		local npos = vector.add(pos, tubelib2.Dir6dToVector[dir or 0])
+		local name = get_nodename(npos)
+		return self.secondary_node_names[name] ~= nil
+	end
+end
+
+function networks.hide_node(pos, node, placer)
+	local inv = placer:get_inventory()
+	local stack = inv:get_stack("main", 1)
+	local taken = stack:take_item(1)
+	
+	if taken:get_count() == 1 and tFillingMaterial[taken:get_name()] then
+		local meta = M(pos)
+		meta:set_string("netw_name", node.name)
+		local param2 = 0
+		local ndef = minetest.registered_nodes[taken:get_name()]
+		if ndef.paramtype2 and ndef.paramtype2 == "facedir" then
+			param2 = minetest.dir_to_facedir(placer:get_look_dir(), true)
+		end
+		minetest.swap_node(pos, {name = taken:get_name(), param2 = param2})
+		inv:set_stack("main", 1, stack)
+		return true
+	end
+end
+
+function networks.open_node(pos, node, placer)
+	local name = networks.hidden_name(pos)
+	local param2
+	if M(pos):get_int("netw_param2") ~= 0 then
+		param2 = M(pos):get_int("netw_param2")
+	else
+		param2 = M(pos):get_int("netw_param2_copy")
+	end
+	minetest.swap_node(pos, {name = name, param2 = param2 % 32})
+	local meta = M(pos)
+	meta:set_string("netw_name", "")
+	local inv = placer:get_inventory()
+	inv:add_item("main", ItemStack(node.name))
+	return true
+end
+
+-------------------------------------------------------------------------------
+-- Patch registered nodes
+-------------------------------------------------------------------------------
+function networks.register_hidden_message(msg)
+	hidden_message = msg
+end
+
+local function get_new_can_dig(old_can_dig)
+	return function(pos, player, ...)
+		if networks.hidden_name(pos) then
+			if player and player.get_player_name then
+				minetest.chat_send_player(player:get_player_name(), hidden_message)
+			end
+			return false
+		end
+		if old_can_dig then
+			return old_can_dig(pos, player, ...)
+		else
+			return true
+		end
+	end
+end
+
+-- Register item names to be used as filling material to hide tubes/cables
+function networks.register_filling_items(names)
+	for _, name in ipairs(names) do
+		tFillingMaterial[name] = true
+		-- Change can_dig for registered filling materials.
+		local ndef = minetest.registered_nodes[name]
+		if ndef then
+			local old_can_dig = ndef.can_dig
+			minetest.override_item(ndef.name, {
+				can_dig = get_new_can_dig(old_can_dig)
+			})
+		end
+	end
+end
+

networks/init.lua

@@ -0,0 +1,40 @@
+--[[
+
+	Networks
+	========
+
+	Copyright (C) 2021 Joachim Stolberg
+
+	AGPL v3
+	See LICENSE.txt for more information
+
+]]--
+
+networks = {}
+
+-- Version for compatibility checks, see readme.md/history
+networks.version = 0.09
+
+if not minetest.global_exists("tubelib2") or tubelib2.version < 2.1 then
+	minetest.log("error", "[networks] Networks requires tubelib2 version 2.1 or newer!")
+	return
+end
+
+local MP = minetest.get_modpath("networks")
+
+dofile(MP .. "/hidden.lua")
+dofile(MP .. "/networks.lua")
+dofile(MP .. "/junction.lua")
+dofile(MP .. "/observer.lua")
+dofile(MP .. "/power.lua")
+dofile(MP .. "/liquid.lua")
+dofile(MP .. "/control.lua")
+
+print("networks_test_enabled", minetest.settings:get_bool("networks_test_enabled"))
+if minetest.settings:get_bool("networks_test_enabled") == true then
+	-- Only for testing/demo purposes
+	dofile(MP .. "/test/test_liquid.lua")
+	local Cable = dofile(MP .. "/test/test_power.lua")
+	assert(loadfile(MP .. "/test/test_control.lua"))(Cable)
+	dofile(MP .. "/test/test_tool.lua")
+end

networks/junction.lua

@@ -1,23 +1,15 @@
 --[[
 
-	TechAge
+	Networks
-	=======
+	========
 
-	Copyright (C) 2019-2020 Joachim Stolberg
+	Copyright (C) 2021 Joachim Stolberg
 
 	AGPL v3
 	See LICENSE.txt for more information
 
-	Junction for power distribution
-
 ]]--
 
--- for lazy programmers
-local S = function(pos) if pos then return minetest.pos_to_string(pos) end end
-local P = minetest.string_to_pos
-local M = minetest.get_meta
-
-
 local function bit(p)
   return 2 ^ (p - 1)  -- 1-based indexing
 end
@@ -51,7 +43,7 @@ end
 -- 'tlib2' is the tubelib2 instance
 -- 'node' is the node definition with tiles, callback functions, and so on
 -- 'index' number for the inventory node (default 0)
-function techage.register_junction(name, size, boxes, tlib2, node, index)
+function networks.register_junction(name, size, boxes, tlib2, node, index)
 	local names = {}
 	for idx = 0,63 do
 		local ndef = table.copy(node)
@@ -60,20 +52,14 @@ function techage.register_junction(name, size, boxes, tlib2, node, index)
 		else
 			ndef.groups.not_in_creative_inventory = 1
 		end
-		ndef.groups.techage_trowel = 1
 		ndef.drawtype = "nodebox"
+		ndef.paramtype = "light"
+		ndef.sunlight_propagates = true
 		ndef.node_box = get_node_box(idx, size, boxes)
 		ndef.paramtype2 = "facedir"
 		ndef.on_rotate = screwdriver.disallow
-		ndef.paramtype = "light" 
-		ndef.use_texture_alpha = techage.CLIP
-		ndef.sunlight_propagates = true 
-		ndef.is_ground_content = false 
 		ndef.drop = name..(index or "0")
 		minetest.register_node(name..idx, ndef)
-		tlib2:add_secondary_node_names({name..idx})
-		-- for the case that 'tlib2.force_to_use_tubes' is set
-		tlib2:add_special_node_names({name..idx}) 
 		names[#names + 1] = name..idx
 	end
 	return names
@@ -93,7 +79,18 @@ local function dir_to_dir2(dir, param2)
 	return dir
 end
 
-function techage.junction_type(pos, network, default_side, param2)
+function networks.junction_type(pos, network, default_side, param2)
+	local connected = function(self, pos, dir)
+		if network:is_primary_node(pos, dir) then
+			local param2, npos = self:get_primary_node_param2(pos, dir)
+			if param2 then
+				local d1, d2, _ = self:decode_param2(npos, param2)
+				dir = networks.Flip[dir]
+				return d1 == dir or dir == d2
+		    end
+		end
+	end
+
 	local val = 0
 	if default_side then
 		val = setbit(val, bit(SideToDir[default_side]))
@@ -101,13 +98,15 @@ function techage.junction_type(pos, network, default_side, param2)
 	for dir = 1,6 do
 		local dir2 = dir_to_dir2(dir, param2)
 		if network.force_to_use_tubes then
-			if network:friendly_primary_node(pos, dir) then
+			if connected(network, pos, dir) then
 				val = setbit(val, bit(dir2))
 			elseif network:is_special_node(pos, dir) then
 				val = setbit(val, bit(dir2))
 			end
 		else
-			if network:connected(pos, dir) then
+			if connected(network, pos, dir) then
+				val = setbit(val, bit(dir2))
+			elseif network:is_secondary_node(pos, dir) then
 				val = setbit(val, bit(dir2))
 			end
 		end

networks/liquid.lua

@@ -0,0 +1,268 @@
+--[[
+
+	Networks
+	========
+
+	Copyright (C) 2021 Joachim Stolberg
+
+	AGPL v3
+	See LICENSE.txt for more information
+	
+	Liquid API for liquid pumping and storing nodes
+
+]]--
+
+-- for lazy programmers
+local S2P = minetest.string_to_pos
+local P2S = function(pos) if pos then return minetest.pos_to_string(pos) end end
+local M = minetest.get_meta
+local N = tubelib2.get_node_lvm
+local LQD = function(pos) return (minetest.registered_nodes[N(pos).name] or {}).liquid end
+
+networks.liquid = {}
+networks.registered_networks.liquid = {}
+
+-- return list of nodes {pos = ..., indir = ...} of given node_type
+local function get_network_table(pos, tlib2, outdir, node_type)
+	local netw = networks.get_network_table(pos, tlib2, outdir)
+	if netw then
+		return netw[node_type] or {}
+	end
+	return {}
+end
+
+-------------------------------------------------------------------------------
+-- For all types of nodes
+-------------------------------------------------------------------------------
+-- names: list of node names
+-- tlib2: tubelib2 instance
+-- node_type: one of "pump", "tank", "junc"
+-- valid_sides: something like {"L", "R"} or nil
+-- liquid_callbacks = {
+--	capa = CAPACITY,
+--	peek = function(pos, indir), -- returns: liquid name
+--	put = function(pos, indir, name, amount),  -- returns: liquid leftover or 0
+--	take = function(pos, indir, name, amount), -- returns: taken, name 
+--	untake = function(pos, indir, name, amount), -- returns: leftover	
+-- }
+function networks.liquid.register_nodes(names, tlib2, node_type, valid_sides, liquid_callbacks)
+	if node_type == "pump" then
+		assert(not valid_sides or type(valid_sides) == "table")
+		valid_sides = valid_sides or {"B", "R", "F", "L", "D", "U"}
+	elseif node_type == "tank" or node_type == "junc" then
+		assert(not valid_sides or type(valid_sides) == "table")
+		valid_sides = valid_sides or {"B", "R", "F", "L", "D", "U"}
+	elseif node_type and type(node_type) == "string" then
+		valid_sides = valid_sides or {"B", "R", "F", "L", "D", "U"}
+	else
+		error("parameter error")
+	end
+	
+	if node_type == "tank" then
+		assert(type(liquid_callbacks) == "table")
+	end
+	
+	tlib2:add_secondary_node_names(names)
+	networks.registered_networks.liquid[tlib2.tube_type] = tlib2
+	
+	for _, name in ipairs(names) do
+		local ndef = minetest.registered_nodes[name]
+		local tbl = ndef.networks or {}
+		tbl[tlib2.tube_type] = {ntype = node_type}
+		minetest.override_item(name, {networks = tbl})
+		minetest.override_item(name, {liquid = liquid_callbacks})
+		tlib2:set_valid_sides(name, valid_sides)
+	end
+end
+
+-- To be called for each liquid network change via
+-- tubelib2_on_update2 or register_on_tube_update2
+function networks.liquid.update_network(pos, outdir, tlib2, node)
+	local ndef = networks.net_def(pos, tlib2.tube_type)
+	if ndef.ntype == "junc" then
+		outdir = 0
+	end
+	networks.update_network(pos, outdir, tlib2, node)
+end
+
+-------------------------------------------------------------------------------
+-- Client/pump functions
+-------------------------------------------------------------------------------
+-- Determine and return liquid 'name' from the
+-- remote inventory.
+function networks.liquid.peek(pos, tlib2, outdir)
+	assert(outdir)
+	for _,item in ipairs(get_network_table(pos, tlib2, outdir, "tank")) do
+		local liq = LQD(item.pos)
+		if liq and liq.peek then
+			return liq.peek(item.pos, item.indir)
+		end
+	end
+end
+
+-- Add given amount of liquid to the remote inventory.
+-- return leftover amount
+function networks.liquid.put(pos, tlib2, outdir, name, amount, show_debug_cube)
+	assert(outdir)
+	assert(name)
+	assert(amount and amount > 0)
+	for _,item in ipairs(get_network_table(pos, tlib2, outdir, "tank")) do
+		local liq = LQD(item.pos)
+		if liq and liq.put and liq.peek then
+			-- wrong items?
+			local peek = liq.peek(item.pos, item.indir)
+			if peek and peek ~= name then return amount or 0 end
+			if show_debug_cube then
+				networks.set_marker(item.pos, "put", 1.1, 1)
+			end
+			amount = liq.put(item.pos, item.indir, name, amount)
+			if not amount or amount == 0 then break end
+		end
+	end
+	return amount or 0
+end
+
+-- Take given amount of liquid from the remote inventory.
+-- return taken amount and item name
+function networks.liquid.take(pos, tlib2, outdir, name, amount, show_debug_cube)
+	assert(outdir)
+	assert(amount and amount > 0)
+	local taken = 0
+	for _,item in ipairs(get_network_table(pos, tlib2, outdir, "tank")) do
+		local liq = LQD(item.pos)
+		if liq and liq.take then
+			if show_debug_cube then
+				networks.set_marker(item.pos, "take", 1.1, 1)
+			end
+			taken, name = liq.take(item.pos, item.indir, name, amount)
+			if taken and name and taken > 0 then
+				break 
+			end
+		end
+	end
+	return taken, name
+end
+
+function networks.liquid.untake(pos, tlib2, outdir, name, amount)
+	assert(outdir)
+	assert(name)
+	assert(amount)
+	for _,item in ipairs(get_network_table(pos, tlib2, outdir, "tank")) do
+		local liq = LQD(item.pos)
+		if liq and liq.untake then
+			amount = liq.untake(item.pos, item.indir, name, amount)
+			if not amount or amount == 0 then break end
+		end
+	end
+	return amount or 0
+end
+
+-------------------------------------------------------------------------------
+-- Server/tank local functions
+-------------------------------------------------------------------------------
+function networks.liquid.is_empty(nvm)
+	return not nvm.liquid or (nvm.liquid.amount or 0) <= 0
+end
+
+function networks.liquid.get_amount(nvm)
+	if nvm.liquid and nvm.liquid.amount then
+		return nvm.liquid.amount
+	end
+	return 0
+end
+
+function networks.liquid.get_item(nvm)
+	local itemname = "<empty>"
+	if nvm.liquid and nvm.liquid.amount and nvm.liquid.amount > 0 and nvm.liquid.name then
+		itemname = nvm.liquid.name.." "..nvm.liquid.amount
+	end
+	return itemname
+end
+
+function networks.liquid.srv_peek(nvm)
+	nvm.liquid = nvm.liquid or {}
+	return nvm.liquid.name
+end
+
+function networks.liquid.srv_put(nvm, name, amount, capa)
+	assert(name)
+	assert(amount and amount >= 0)
+	assert(capa and capa > 0)
+	
+	nvm.liquid = nvm.liquid or {}
+	amount = amount or 0
+	if not nvm.liquid.name then
+		nvm.liquid.name = name
+		nvm.liquid.amount = amount
+		return 0
+	elseif nvm.liquid.name == name then
+		nvm.liquid.amount = nvm.liquid.amount or 0
+		if nvm.liquid.amount + amount <= capa then
+			nvm.liquid.amount = nvm.liquid.amount + amount
+			return 0
+		else
+			local rest = nvm.liquid.amount + amount - capa
+			nvm.liquid.amount = capa
+			return rest
+		end
+	end
+	return amount
+end
+
+function networks.liquid.srv_take(nvm, name, amount)
+	assert(amount and amount >= 0)
+	
+	nvm.liquid = nvm.liquid or {}
+	amount = amount or 0
+	if not name or nvm.liquid.name == name then
+		name = nvm.liquid.name
+		nvm.liquid.amount = nvm.liquid.amount or 0
+		if nvm.liquid.amount > amount then
+			nvm.liquid.amount = nvm.liquid.amount - amount
+			return amount, name
+		else 
+			local rest = nvm.liquid.amount
+			local name = nvm.liquid.name
+			nvm.liquid.amount = 0
+			nvm.liquid.name = nil
+			return rest, name
+		end
+	end
+	return 0
+end
+
+-------------------------------------------------------------------------------
+-- Valve
+-------------------------------------------------------------------------------
+function networks.liquid.turn_valve_on(pos, tlib2, name_off, name_on)
+	local node = N(pos)
+	local meta = M(pos)
+	if node.name == name_off then
+		node.name = name_on
+		minetest.swap_node(pos, node)
+		tlib2:after_place_tube(pos)
+		meta:set_int("networks_param2", node.param2)
+		return true
+	elseif meta:contains("networks_param2_copy") then
+		meta:set_int("networks_param2", meta:get_int("networks_param2_copy"))
+		tlib2:after_place_tube(pos)
+		return true
+	end
+end
+
+function networks.liquid.turn_valve_off(pos, tlib2, name_off, name_on)
+	local node = N(pos)
+	local meta = M(pos)
+	if node.name == name_on then
+		node.name = name_off
+		minetest.swap_node(pos, node)
+		meta:set_int("networks_param2", 0)
+		tlib2:after_dig_tube(pos, node)
+		return true
+	elseif meta:contains("networks_param2") then
+		meta:set_int("networks_param2_copy", meta:get_int("networks_param2"))
+		meta:set_int("networks_param2", 0)
+		tlib2:after_dig_tube(pos, node)
+		return true
+	end
+end

networks/mod.conf

@@ -0,0 +1,4 @@
+name = networks
+depends = screwdriver,tubelib2
+description = Build and manage networks based on tubelib2 tubes/pipes/cables
+

networks/networks.lua

@@ -0,0 +1,497 @@
+--[[
+
+	Networks
+	========
+
+	Copyright (C) 2021 Joachim Stolberg
+
+	AGPL v3
+	See LICENSE.txt for more information
+
+]]--
+
+-- for lazy programmers
+local S2P = minetest.string_to_pos
+local P2S = function(pos) if pos then return minetest.pos_to_string(pos) end end
+local M = minetest.get_meta
+local N = tubelib2.get_node_lvm
+
+local Networks = {} -- cache for networks: {netw_type = {netID = <network>, ...}, ...}
+local NetIDs = {}   -- cache for netw IDs: {pos_hash = {outdir = netID, ...}, ...}
+
+local MAX_NUM_NODES = 1000  -- per network including junctions
+local TTL = 5 * 60  -- 5 minutes
+local Route = {} -- Used to determine the already passed nodes while walking
+local NumNodes = 0  -- Used to determine the number of network nodes
+
+local Flip = tubelib2.Turn180Deg
+local get_nodename = networks.get_nodename
+local get_node = networks.get_node
+
+-------------------------------------------------------------------------------
+-- Debugging
+-------------------------------------------------------------------------------
+-- Table for all registered tubelib2 instances
+networks.registered_networks = {}  -- {api_type = {instance,...}}
+
+-- Maintain simple numbers for the bulky netID hashes
+local DbgNetIDs = {}
+local DbgCounter = 1
+
+local function netw_num(netID)
+	if not netID or netID < 1 then
+		return netID or 0
+	end
+	if not DbgNetIDs[netID] then
+		DbgNetIDs[netID] = DbgCounter
+		DbgCounter = DbgCounter + 1
+	end
+	return DbgNetIDs[netID]
+end
+	
+local function network_nodes(netID, network)
+	local tbl = {}
+	for node_type,table in pairs(network or {}) do
+		if type(table) == "table" then
+			tbl[#tbl+1] = "#" .. node_type .. " = " .. #table
+		end
+	end
+	tbl[#tbl+1] = "num_nodes = " .. (network.num_nodes or 0)
+	return "Network " .. netw_num(netID) .. ": " .. table.concat(tbl, ", ")
+end
+
+-- Marker entities for debugging purposes
+function networks.set_marker(pos, text, size, ttl)
+	local marker = minetest.add_entity(pos, "networks:marker_cube")
+	if marker ~= nil then
+		marker:set_nametag_attributes({color = "#FFFFFF", text = text})
+		size = size or 1
+		marker:set_properties({visual_size = {x = size, y = size}})
+		if ttl then
+			minetest.after(ttl, marker.remove, marker)
+		end
+	end
+end
+
+minetest.register_entity("networks:marker_cube", {
+	initial_properties = {
+		visual = "cube",
+		textures = {
+			"networks_marker.png",
+			"networks_marker.png",
+			"networks_marker.png",
+			"networks_marker.png",
+			"networks_marker.png",
+			"networks_marker.png",
+		},
+		physical = false,
+		visual_size = {x = 1.1, y = 1.1},
+		collisionbox = {-0.55,-0.55,-0.55, 0.55,0.55,0.55},
+		glow = 8,
+		static_save = false,
+	},
+	on_punch = function(self)
+		self.object:remove()
+	end,
+})
+
+-------------------------------------------------------------------------------
+-- Helper
+-------------------------------------------------------------------------------
+-- return the networks table from the node definition
+local function net_def(pos, netw_type) 
+	local ndef = minetest.registered_nodes[get_nodename(pos)]
+	if ndef and ndef.networks then
+		return ndef.networks[netw_type]
+	end
+	error("Node " ..  get_nodename(pos) .. " at ".. P2S(pos) .. " has no 'ndef.networks'")
+end
+
+local function net_def2(pos, node_name, netw_type) 
+	local ndef = minetest.registered_nodes[node_name]
+	if ndef and ndef.networks then
+		return ndef.networks[netw_type]
+	end
+	return net_def(pos, netw_type) 
+end
+
+-- Don't allow direct connections between to nodes of the same type
+local function valid_secondary_node_connection(tlib2, pos, dir)
+	local node1 = tlib2:get_secondary_node(pos, dir)
+	if node1 then
+		local node2 = N(pos)
+		local ndef1 = minetest.registered_nodes[node1.name]
+		local ndef2 = minetest.registered_nodes[node2.name]
+		local ntype1 = ((ndef1.networks or {})[tlib2.tube_type] or {}).ntype
+		local ntype2 = ((ndef2.networks or {})[tlib2.tube_type] or {}).ntype
+		return ntype1 == "junc" or ntype1 ~= ntype2
+	end
+end
+
+-- Returns true if node is connected with another network node
+local function connected(tlib2, pos, dir)
+	local param2, npos = tlib2:get_primary_node_param2(pos, dir)
+	if param2 then
+		local d1, d2, num = tlib2:decode_param2(npos, param2)
+		if not num then return end
+		return Flip[dir] == d1 or Flip[dir] == d2
+	end
+	-- secondary nodes allowed?
+	if tlib2.force_to_use_tubes then
+		return tlib2:is_special_node(pos, dir)
+	else
+		return valid_secondary_node_connection(tlib2, pos, dir)
+	end
+end
+
+local function side_to_outdir(pos, side)
+	return tubelib2.side_to_dir(side, N(pos).param2)
+end
+
+-- determine outdir based on node type
+local function get_outdir(node_type, indir)
+	if node_type == "junc" then
+		return 0 -- same network on all sides
+	else
+		return Flip[indir]
+	end
+end
+
+-------------------------------------------------------------------------------
+-- Node Connections
+-------------------------------------------------------------------------------
+
+-- Get tlib2 connection dirs as table
+-- used e.g. for the connection walk
+local function get_node_connection_dirs(pos, netw_type)
+	local val = M(pos):get_int(netw_type.."_conn")
+    local tbl = {}
+    if val % 0x40 >= 0x20 then tbl[#tbl+1] = 1 end
+    if val % 0x20 >= 0x10 then tbl[#tbl+1] = 2 end
+    if val % 0x10 >= 0x08 then tbl[#tbl+1] = 3 end
+    if val % 0x08 >= 0x04 then tbl[#tbl+1] = 4 end
+    if val % 0x04 >= 0x02 then tbl[#tbl+1] = 5 end
+    if val % 0x02 >= 0x01 then tbl[#tbl+1] = 6 end
+    return tbl
+end
+
+local function get_node_connection_dirs_table(pos, netw_type)
+	local val = M(pos):get_int(netw_type.."_conn")
+    local tbl = {}
+    if val % 0x40 >= 0x20 then tbl[1] = true end
+    if val % 0x20 >= 0x10 then tbl[2] = true end
+    if val % 0x10 >= 0x08 then tbl[3] = true end
+    if val % 0x08 >= 0x04 then tbl[4] = true end
+    if val % 0x04 >= 0x02 then tbl[5] = true end
+    if val % 0x02 >= 0x01 then tbl[6] = true end
+    return tbl
+end
+
+-- store all node sides with tube connections as nodemeta
+local function store_node_connection_sides(pos, tlib2)
+	local node = get_node(pos)
+	local val = 0
+	for dir = 1,6 do
+		val = val * 2
+		if tlib2:is_valid_dir(node, dir) and connected(tlib2, pos, dir) then
+			val = val + 1
+		end
+	end
+	M(pos):set_int(tlib2.tube_type.."_conn", val)
+end
+
+-- If outdir is given, return outdir, otherwise return all valid node dirs with tube connections
+local function get_outdirs(pos, tlib2, outdir)
+	if outdir then
+		return {outdir}
+	end
+	return get_node_connection_dirs(pos, tlib2.tube_type)
+end
+
+-------------------------------------------------------------------------------
+-- Connection Walk
+-------------------------------------------------------------------------------
+local function pos_already_reached(pos)
+	local key = minetest.hash_node_position(pos)
+	if not Route[key] and NumNodes < MAX_NUM_NODES then
+		Route[key] = true
+		NumNodes = NumNodes + 1
+		return false
+	end
+	return true
+end
+
+-- check if the given tube dir into the node is valid
+local function valid_indir(pos, indir, node, tlib2)
+	local outdir = Flip[indir]
+	return tlib2:is_valid_dir(node, outdir)
+end
+
+local function is_junction(pos, name, tlib2)
+	local ndef = net_def2(pos, name,  tlib2.tube_type)
+	if ndef then
+		return ndef.ntype == "junc"
+	end
+end
+
+-- Do the walk through the tubelib2 network.
+-- `indir` is the direction which should not be covered by the walk
+-- (coming from there).
+-- if outdir is given, only this dir is used
+local function connection_walk(pos, outdir, indir, node, tlib2, clbk)
+	if clbk then clbk(pos, indir, node) end
+	if outdir or is_junction(pos, node.name, tlib2) then
+		for _,outdir in ipairs(get_outdirs(pos, tlib2, outdir)) do
+			local pos2, indir2 = tlib2:get_connected_node_pos(pos, outdir)
+			local node = get_node(pos2)
+			if valid_indir(pos2, indir2, node, tlib2) and not pos_already_reached(pos2) then
+				connection_walk(pos2, nil, indir2, node, tlib2, clbk)
+			end
+		end
+	end
+end
+
+local function collect_network_nodes(pos, tlib2, outdir)
+	local t = minetest.get_us_time()
+	Route = {}
+	NumNodes = 0
+	pos_already_reached(pos) 
+	local netw = {}
+	local node = N(pos)
+	local netw_type = tlib2.tube_type
+	local tbl = get_node_connection_dirs_table(pos, netw_type)
+	if tbl[outdir] then -- valid conncetion
+		-- outdir corresponds to the indir coming from
+		connection_walk(pos, outdir, Flip[outdir], node, tlib2, function(pos, indir, node)
+			local ndef = net_def2(pos, node.name, netw_type)
+			if ndef then
+				local ntype = ndef.ntype
+				if not netw[ntype] then netw[ntype] = {} end
+				netw[ntype][#netw[ntype] + 1] = {pos = pos, indir = indir}
+			end
+		end)
+	end
+	netw.ttl = minetest.get_gametime() + TTL
+	netw.num_nodes = NumNodes
+	t = minetest.get_us_time() - t
+	--print("collect_network_nodes in " .. t .. " us", NumNodes, P2S(pos), N(pos).name)
+	return netw
+end
+
+-------------------------------------------------------------------------------
+-- Maintain Network
+-------------------------------------------------------------------------------
+local function set_network(netw_type, netID, network)
+	assert(netID)
+	if netID > 0 then
+		Networks[netw_type] = Networks[netw_type] or {}
+		Networks[netw_type][netID] = network
+		Networks[netw_type][netID].ttl = minetest.get_gametime() + TTL
+	end
+end
+
+-- Return network if available, or dummy network.
+-- The function updates the network TTL, thus keeping the network alive.
+local function get_network(netw_type, netID)
+	assert(netID)
+	if netID > 0 then
+		local netw = Networks[netw_type] and Networks[netw_type][netID]
+		if netw then
+			netw.ttl = minetest.get_gametime() + TTL
+			return netw
+		end
+	end
+	return {num_nodes = 0}
+end
+
+local function delete_network(netw_type, netID)
+	assert(netID)
+	if netID > 0 then
+		if Networks[netw_type] and Networks[netw_type][netID] then
+			Networks[netw_type][netID] = nil
+		end
+	end
+end
+
+-- Keep data in memory small
+local function remove_outdated_networks()
+	local to_be_deleted = {}
+	local t = minetest.get_gametime()
+	for net_name,tbl in pairs(Networks) do
+		for netID,network in pairs(tbl) do
+			local valid = (network.ttl or 0) - t
+			if valid < 0 then
+				to_be_deleted[#to_be_deleted+1] = {net_name, netID}
+			end
+		end
+	end
+	for _,item in ipairs(to_be_deleted) do
+		local net_name, netID = unpack(item)
+		Networks[net_name][netID] = nil
+		print("Network " .. netw_num(netID) .. " timed out")
+	end
+	minetest.after(60, remove_outdated_networks)
+end
+minetest.after(60, remove_outdated_networks)
+
+-------------------------------------------------------------------------------
+-- Maintain netID
+-------------------------------------------------------------------------------
+local function set_netID(pos, outdir, netID)
+	local hash = minetest.hash_node_position(pos)
+	NetIDs[hash] = NetIDs[hash] or {}
+	NetIDs[hash][outdir] = netID
+end	
+
+local function get_netID(pos, outdir)
+	local hash = minetest.hash_node_position(pos)
+	NetIDs[hash] = NetIDs[hash] or {}
+	return NetIDs[hash][outdir]
+end
+
+-- determine network ID (largest hash number of all nodes with given type)
+local function determine_netID(netw)
+	local netID = 0
+	for node_type, table in pairs(netw) do
+		if type(table) == "table" then
+			for _, item in ipairs(netw[node_type] or {}) do
+				local outdir = Flip[item.indir]
+				local new = minetest.hash_node_position(item.pos) * 8 + outdir
+				if netID <= new then
+					netID = new
+				end
+			end
+		end
+	end
+	return netID
+end
+
+-- store network ID for each network node
+local function store_netID(tlib2, netw, netID)
+	for node_type, table in pairs(netw) do
+		if type(table) == "table" then
+			for _, item in ipairs(table) do
+				local outdir = get_outdir(node_type, item.indir)
+				set_netID(item.pos, outdir, netID)
+			end
+		end
+	end
+	set_network(tlib2.tube_type, netID, netw)
+end
+
+-- delete network and netID for all nodes in the network
+-- `outdir` shall be 0 for junctions
+local function delete_netID(pos, tlib2, outdir)
+	local netID = get_netID(pos, outdir)
+	if netID then
+		local netw = get_network(tlib2.tube_type, netID)
+		for node_type, table in pairs(netw) do
+			if type(table) == "table" then
+				for _, item in ipairs(table) do
+					local outdir = get_outdir(node_type, item.indir)
+					set_netID(item.pos, outdir, nil)
+				end
+			end
+		end
+		set_netID(pos, outdir, nil)
+		delete_network(tlib2.tube_type, netID)
+	end
+end
+
+-------------------------------------------------------------------------------
+-- API Functions
+-------------------------------------------------------------------------------
+
+networks.MAX_NUM_NODES = MAX_NUM_NODES
+
+-- Table for a 180 degree turn: indir => outdir and vice versa
+networks.Flip = tubelib2.Turn180Deg
+
+-- networks.net_def(pos, netw_type)
+networks.net_def = net_def
+
+--	sides:                               outdir: 
+--              U
+--              |    B
+--              |   /                              6  (N)
+--           +--|-----+                            |  1
+--          /   o    /|                            | /
+--         +--------+ |                            |/
+--  L <----|        |o----> R        (W) 4 <-------+-------> 2 (O)
+--         |    o   | |                           /|
+--         |   /    | +                          / |
+--         |  /     |/                          3  |
+--         +-/------+                        (S)   5
+--          /   |
+--         F    |
+--              D
+--
+-- networks.side_to_outdir(pos, side)
+networks.side_to_outdir = side_to_outdir
+
+-- networks.is_junction(pos, name, tlib2)
+networks.is_junction = is_junction
+
+-- Return a simple number instead of the netID
+-- Useful for debuging purposes
+-- networks.netw_num(netID)
+networks.netw_num = netw_num
+
+-- For debugging purposes
+-- networks.network_nodes(netID, network)
+networks.network_nodes = network_nodes
+
+-- networks.get_network(netw_type, netID)
+networks.get_network = get_network
+
+-- return the networks table from the node definition
+-- networks.net_def(pos, netw_type) 
+networks.net_def = net_def
+	
+-- Function returns {outdir} or all node dirs with connections
+-- networks.get_outdirs(pos, tlib2, outdir)
+networks.get_outdirs = get_outdirs
+
+-- Provide own netID
+-- networks.get_netID(pos, outdir)
+networks.get_netID = get_netID
+
+-- networks.get_node_connection_dirs(pos, netw_type)
+networks.get_node_connection_dirs = get_node_connection_dirs
+
+-- To be called from each node via 'tubelib2_on_update2'
+-- 'output' is optional and only needed for nodes with dedicated
+-- pipe sides. Junctions have to provide 0 (= same network on all sides).
+function networks.update_network(pos, outdir, tlib2, node)
+	store_node_connection_sides(pos, tlib2) -- update node internal data
+	delete_netID(pos, tlib2, outdir) -- delete node netIDs and network
+end
+
+-- Provide or determine netID
+function networks.determine_netID(pos, tlib2, outdir)
+	assert(outdir)
+	local netID = get_netID(pos, outdir)
+	if netID and Networks[tlib2.tube_type] and Networks[tlib2.tube_type][netID] then
+		return netID 
+	elseif netID == 0 then
+		return -- no network available
+	end
+	
+	local netw = collect_network_nodes(pos, tlib2, outdir)
+	if netw.num_nodes > 1 then
+		netID = determine_netID(netw)
+		store_netID(tlib2, netw, netID)
+		return netID
+	end
+	-- mark as "no network"
+	set_netID(pos, outdir, 0)
+end
+
+-- Provide network with all node tables
+function networks.get_network_table(pos, tlib2, outdir)
+	assert(outdir)
+	local netID = networks.determine_netID(pos, tlib2, outdir)
+	if netID and netID > 0 then
+		return get_network(tlib2.tube_type, netID)
+	end
+end

networks/observer.lua

@@ -0,0 +1,32 @@
+--[[
+
+	Networks
+	========
+
+	Copyright (C) 2021 Joachim Stolberg
+
+	AGPL v3
+	See LICENSE.txt for more information
+
+	Node observer for debugging/testing purposes
+
+]]--
+
+-- for lazy programmers
+local S2P = minetest.string_to_pos
+local P2S = function(pos) if pos then return minetest.pos_to_string(pos) end end
+local M = minetest.get_meta
+local N = tubelib2.get_node_lvm
+
+local ObservePos = nil
+
+function networks.register_observe_pos(pos)
+	ObservePos = pos
+end
+
+function networks.node_observer(tag, pos, tbl1, tbl2)
+	if ObservePos and pos and vector.equals(pos, ObservePos) then
+		print("##### Node_observer (" .. (minetest.get_gametime() % 100) .. "): '" .. N(pos).name .. "' - " .. tag)
+		print("tbl1", dump(tbl1), "\ntbl2", dump(tbl2))
+	end
+end

networks/power.lua

@@ -0,0 +1,441 @@
+--[[
+
+	Networks
+	========
+
+	Copyright (C) 2021 Joachim Stolberg
+
+	AGPL v3
+	See LICENSE.txt for more information
+	
+	Power API for power consuming and generating nodes
+
+]]--
+
+-- for lazy programmers
+local S2P = minetest.string_to_pos
+local P2S = function(pos) if pos then return minetest.pos_to_string(pos) end end
+local M = minetest.get_meta
+local N = tubelib2.get_node_lvm
+local OBS = networks.node_observer
+local Flip = tubelib2.Turn180Deg
+
+networks.power = {}
+networks.registered_networks.power = {}
+
+local DEFAULT_DATA = {
+	curr_load = 0,  -- network storage value
+	max_capa = 0,   -- network storage capacity
+	consumed = 0,   -- consumed power by consumers 
+	provided = 0,   -- provided power by generators 
+	available = 0,  -- max. available generator power
+	netw_num = 0,   -- network number
+}
+
+-- Storage parameters:
+-- capa = maximum value in power units
+-- load = current value in power units
+-- level = ratio value (load/capa) (0..1)
+
+local Power = {}  -- {netID = {curr_load, max_capa, consumed, provided, available}}
+
+
+
+-- Determine load, capa and other power network data
+local function get_power_data(pos, tlib2, outdir, netID)
+	assert(outdir)
+	local netw = networks.get_network_table(pos, tlib2, outdir) or {}
+	local max_capa = 1  -- to prevent nan
+	local max_perf = 0
+	local curr_load = 0
+	-- Generators
+	for _,item in ipairs(netw.gen or {}) do
+		local ndef = minetest.registered_nodes[N(item.pos).name]
+		local data = ndef.get_generator_data and ndef.get_generator_data(item.pos, Flip[item.indir], tlib2)
+		if data then
+			OBS("get_power_data", item.pos, data)
+			max_capa = max_capa + (data.capa or 0)
+			max_perf = max_perf + (data.perf or 0)
+			curr_load = curr_load + ((data.level or 0) * (data.capa or 0))
+		end
+	end
+	-- Storage systems
+	for _,item in ipairs(netw.sto or {}) do
+		local ndef = minetest.registered_nodes[N(item.pos).name]
+		local data = ndef.get_storage_data and ndef.get_storage_data(item.pos, Flip[item.indir], tlib2)
+		if data then
+			OBS("get_power_data", item.pos, data)
+			max_capa = max_capa + (data.capa or 0)
+			curr_load = curr_load + ((data.level or 0) * (data.capa or 0))
+		end
+	end
+	Power[netID] = {
+		curr_load = curr_load,    -- network storage value
+		max_capa = max_capa,      -- network storage capacity
+		max_perf = max_perf,      -- max. available power
+		consumed = 0,             -- consumed power
+		provided = 0,             -- provided power
+		available = 0,            -- available power          
+		num_nodes = netw.num_nodes,
+	}
+	return Power[netID]
+end
+
+-------------------------------------------------------------------------------
+-- For all types of nodes
+-------------------------------------------------------------------------------
+-- names: list of node names
+-- tlib2: tubelib2 instance
+-- node_type: one of "gen", "con", "sto", "junc"
+-- valid_sides: something like {"L", "R"} or nil
+function networks.power.register_nodes(names, tlib2, node_type, valid_sides)
+	if node_type == "gen" then
+		assert(#valid_sides <= 2)
+	elseif node_type == "sto" then
+		assert(#valid_sides == 1)
+	elseif node_type == "con" or node_type == "junc" then
+		assert(not valid_sides or type(valid_sides) == "table")
+		valid_sides = valid_sides or {"B", "R", "F", "L", "D", "U"}
+	elseif node_type and type(node_type) == "string" then
+		valid_sides = valid_sides or {"B", "R", "F", "L", "D", "U"}
+	else
+		error("parameter error")
+	end
+	
+	tlib2:add_secondary_node_names(names)
+	networks.registered_networks.power[tlib2.tube_type] = tlib2
+	
+	for _, name in ipairs(names) do
+		local ndef = minetest.registered_nodes[name]
+		local tbl = ndef.networks or {}
+		assert(tbl[tlib2.tube_type] == nil, "more than one call of 'networks.power.register_nodes' for " .. names[1])
+		tbl[tlib2.tube_type] = {ntype = node_type}
+		minetest.override_item(name, {networks = tbl})
+		tlib2:set_valid_sides(name, valid_sides)
+	end
+end
+
+-- To be called for each power network change via
+-- tubelib2_on_update2 or register_on_tube_update2
+function networks.power.update_network(pos, outdir, tlib2, node)
+	local ndef = networks.net_def(pos, tlib2.tube_type)
+	assert(ndef, "node " .. N(pos).name .. " has no 'networks." .. tlib2.tube_type .. "' table")
+	if ndef.ntype == "junc" then
+		outdir = 0
+	end
+	local netID = networks.get_netID(pos, outdir)
+	if netID then
+		Power[netID] = nil
+	end
+	networks.update_network(pos, outdir, tlib2, node)
+end
+
+-------------------------------------------------------------------------------
+-- Consumer
+-------------------------------------------------------------------------------
+-- Function checks for a power grid, not for enough power
+-- Param outdir is optional
+function networks.power.power_available(pos, tlib2, outdir)
+	for _,outdir in ipairs(networks.get_outdirs(pos, tlib2, outdir)) do
+		local netID = networks.determine_netID(pos, tlib2, outdir)
+		if netID then
+			local pwr = Power[netID] or get_power_data(pos, tlib2, outdir, netID)
+			OBS("power_available", pos, pwr)
+			return pwr.curr_load > 0
+		end
+	end
+end
+
+-- Param outdir is optional
+function networks.power.consume_power(pos, tlib2, outdir, amount)
+	assert(amount)
+	for _,outdir in ipairs(networks.get_outdirs(pos, tlib2, outdir)) do
+		local netID = networks.determine_netID(pos, tlib2, outdir)
+		if netID then
+			local pwr = Power[netID] or get_power_data(pos, tlib2, outdir, netID)
+			OBS("consume_power", pos, {outdir = outdir, amount = amount}, pwr)
+			if pwr.curr_load >= amount then
+				pwr.curr_load = pwr.curr_load - amount
+				pwr.consumed = pwr.consumed + amount
+				return amount
+			else
+				local consumed = pwr.curr_load
+				pwr.curr_load = 0
+				pwr.consumed = pwr.consumed + consumed
+				return consumed
+			end
+		end
+	end
+	return 0
+end
+
+-------------------------------------------------------------------------------
+-- Generator
+-------------------------------------------------------------------------------
+-- amount is the maximum power, the generator can provide.
+-- cp1 and cp2 are control points for the charge regulator.
+-- From cp1 the charging power is reduced more and more and reaches zero at cp2.
+--
+--        A
+--        |
+--  100 % |-------------------__
+--        |                     --__
+--        |                         --__
+--        |                             --__
+--      --+------------------+---------------+---->
+--        |                 cp1             cp2
+--
+function networks.power.provide_power(pos, tlib2, outdir, amount, cp1, cp2)
+	assert(outdir)
+	assert(amount and amount > 0)
+	local netID = networks.determine_netID(pos, tlib2, outdir)
+	if netID then
+		local pwr = Power[netID] or get_power_data(pos, tlib2, outdir, netID)
+		local x = pwr.curr_load / pwr.max_capa
+		OBS("provide_power", pos, {outdir = outdir, amount = amount}, pwr)
+		
+		pwr.available = pwr.available + amount
+		amount = math.min(amount, pwr.max_capa - pwr.curr_load)
+		cp1 = cp1 or 0.8
+		cp2 = cp2 or 1.0
+		
+		if x < cp1 then  -- charge with full power
+			pwr.curr_load = pwr.curr_load + amount
+			pwr.provided = pwr.provided + amount
+			return amount
+		elseif x < cp2 then  -- charge with reduced power
+			local factor = 1 - ((x - cp1) / (cp2 - cp1))
+			local provided = amount * factor
+			pwr.curr_load = pwr.curr_load + provided
+			pwr.provided = pwr.provided + provided
+			return provided
+		else  -- turn off
+			return 0
+		end
+	end
+	return 0
+end
+
+-- Function for generators with storage capacity
+function networks.power.get_storage_load(pos, tlib2, outdir, amount)
+	local netID = networks.determine_netID(pos, tlib2, outdir)
+	if netID then
+		local pwr = Power[netID] or get_power_data(pos, tlib2, outdir, netID)
+		OBS("get_storage_load", pos, pwr)
+		if pwr.max_capa and pwr.max_capa > 0 then
+			return pwr.curr_load / pwr.max_capa * amount
+		else
+			error("invalid pwr.max_capa", pwr.max_capa)
+		end
+	end
+	return 0
+end
+
+-------------------------------------------------------------------------------
+-- Storage
+-------------------------------------------------------------------------------
+-- Function returns a table with storage level as ratio (0..1) and the
+-- charging state (1 = charging, -1 = uncharging, or 0)
+-- Function provides nil if no network is available
+function networks.power.get_storage_data(pos, tlib2, outdir)
+	assert(outdir)
+	local netID = networks.determine_netID(pos, tlib2, outdir)
+	if netID then
+		local pwr = Power[netID] or get_power_data(pos, tlib2, outdir, netID)
+		OBS("get_storage_data", pos, pwr)
+		local charging = (pwr.provided > pwr.consumed and 1) or (pwr.provided < pwr.consumed and -1) or 0
+		return {level = pwr.curr_load / pwr.max_capa, charging = charging}
+	end
+end
+
+-- To be called for each network storage change (turn on/off of storage/generator nodes)
+function networks.power.start_storage_calc(pos, tlib2, outdir)
+	assert(outdir)
+	local netID = networks.determine_netID(pos, tlib2, outdir)
+	OBS("start_storage_calc", pos)
+	if netID then
+		Power[netID] = nil
+	end
+end
+
+-------------------------------------------------------------------------------
+-- Transformer
+-------------------------------------------------------------------------------
+-- Charge transfer in both directions between network 1 and network 2
+-- 'netw1' and 'netw2' are tubelib2 network instances.
+-- Function returns a table with result values for:
+-- {curr_load1, curr_load2, max_capa1, max_capa2, moved}
+function networks.power.transfer_duplex(pos, netw1, outdir1, netw2, outdir2, amount)
+	local netID1 = networks.determine_netID(pos, netw1, outdir1)
+	local netID2 = networks.determine_netID(pos, netw2, outdir2)
+	if netID1 and netID2 then
+		local pwr1 = Power[netID1] or get_power_data(pos, netw1, outdir1, netID1)
+		local pwr2 = Power[netID2] or get_power_data(pos, netw2, outdir2, netID2)
+		local lvl = pwr1.curr_load / pwr1.max_capa - pwr2.curr_load / pwr2.max_capa
+		local moved
+		
+		pwr2.available = pwr2.available + amount
+		pwr1.available = pwr1.available + amount
+		if lvl > 0 then
+			-- transfer from netw1 to netw2
+			moved = math.min(amount, lvl * math.min(pwr1.max_capa, pwr2.max_capa))
+			moved = math.max(moved, 0)
+			pwr1.curr_load = pwr1.curr_load - moved
+			pwr2.curr_load = pwr2.curr_load + moved
+			pwr1.consumed = (pwr1.consumed or 0) + moved
+			pwr2.provided = (pwr2.provided or 0) + moved
+		elseif lvl < 0 then
+			-- transfer from netw2 to netw1
+			moved = math.min(amount, lvl * math.min(pwr1.max_capa, pwr2.max_capa))
+			moved = math.max(moved, 0)
+			pwr2.curr_load = pwr2.curr_load - moved
+			pwr1.curr_load = pwr1.curr_load + moved
+			pwr2.consumed = (pwr2.consumed or 0) + moved
+			pwr1.provided = (pwr1.provided or 0) + moved
+		else
+			moved = 0
+		end	
+		OBS("transfer_duplex", pos, pwr1, pwr2)
+		return {
+			curr_load1 = pwr1.curr_load, 
+			curr_load2 = pwr2.curr_load, 
+			max_capa1 = pwr1.max_capa, 
+			max_capa2 = pwr2.max_capa, 
+			moved = moved}
+	end
+end
+
+-- Charge transfer in one direction from network 1 to network 2
+-- 'netw1' and 'netw2' are tubelib2 network instances.
+-- Function returns a table with result values for:
+-- {curr_load1, curr_load2, max_capa1, max_capa2, moved}
+function networks.power.transfer_simplex(pos, netw1, outdir1, netw2, outdir2, amount)
+	local netID1 = networks.determine_netID(pos, netw1, outdir1)
+	local netID2 = networks.determine_netID(pos, netw2, outdir2)
+	if netID1 and netID2 then
+		local pwr1 = Power[netID1] or get_power_data(pos, netw1, outdir1, netID1)
+		local pwr2 = Power[netID2] or get_power_data(pos, netw2, outdir2, netID2)
+		local lvl = pwr1.curr_load / pwr1.max_capa - pwr2.curr_load / pwr2.max_capa
+		local moved
+		
+		pwr2.available = pwr2.available + amount
+		if lvl > 0 then
+			-- transfer from netw1 to netw2
+			moved = math.min(amount, lvl * math.min(pwr1.max_capa, pwr2.max_capa))
+			moved = math.max(moved, 0)
+			pwr1.curr_load = pwr1.curr_load - moved
+			pwr2.curr_load = pwr2.curr_load + moved
+			pwr1.consumed = (pwr1.consumed or 0) + moved
+			pwr2.provided = (pwr2.provided or 0) + moved
+		else
+			moved = 0
+		end	
+		OBS("transfer_simplex", pos, pwr1, pwr2)
+		return {
+			curr_load1 = pwr1.curr_load, 
+			curr_load2 = pwr2.curr_load, 
+			max_capa1 = pwr1.max_capa, 
+			max_capa2 = pwr2.max_capa, 
+			moved = moved}
+	end
+end
+
+-------------------------------------------------------------------------------
+-- Switch
+-------------------------------------------------------------------------------
+function networks.power.turn_switch_on(pos, tlib2, name_off, name_on)
+	local node = N(pos)
+	local meta = M(pos)
+	local changed = false
+	
+	if node.name == name_off then
+		node.name = name_on
+		changed = true
+	elseif meta:get_string("netw_name") == name_off then
+		meta:set_string("netw_name", name_on)
+	else
+		return false
+	end
+	
+	if meta:contains("netw_param2") then
+		meta:set_int("netw_param2", meta:get_int("netw_param2_copy"))
+	else	
+		node.param2 = meta:get_int("netw_param2_copy")
+	end
+	meta:set_int("netw_param2_copy", 0)
+	
+	if changed then
+		minetest.swap_node(pos, node)
+	end
+
+	tlib2:after_place_tube(pos)
+	return true
+end
+
+function networks.power.turn_switch_off(pos, tlib2, name_off, name_on)
+	local node = N(pos)
+	local meta = M(pos)
+	local changed = false
+	
+	if node.name == name_on then
+		node.name = name_off
+		changed = true
+	elseif meta:get_string("netw_name") == name_on then
+		meta:set_string("netw_name", name_off)
+	else
+		return false
+	end
+	
+	if meta:contains("netw_param2") then
+		meta:set_int("netw_param2_copy", meta:get_int("netw_param2"))
+		--meta:set_int("netw_param2", 0)
+	else	
+		meta:set_int("netw_param2_copy", node.param2)
+	end
+	
+	if changed then
+		minetest.swap_node(pos, node)
+	end
+	
+	if meta:contains("netw_param2") then
+		node.param2 = meta:get_int("netw_param2")
+	end
+	tlib2:after_dig_tube(pos, node)
+	return true
+end
+
+-------------------------------------------------------------------------------
+-- Statistics
+-------------------------------------------------------------------------------
+function networks.power.get_network_data(pos, tlib2, outdir)
+	for _,outdir in ipairs(networks.get_outdirs(pos, tlib2, outdir)) do
+		local netID = networks.determine_netID(pos, tlib2, outdir)
+		if netID then
+			local pwr = Power[netID] or get_power_data(pos, tlib2, outdir, netID)
+			local consumed, provided, available
+			if pwr.available > 0 and pwr.max_perf > 0 then
+				local fac = pwr.max_perf / pwr.available
+				available = pwr.max_perf
+				provided = pwr.provided * fac
+				consumed = pwr.consumed * fac
+			else
+				available = pwr.max_perf
+				provided = 0
+				consumed = pwr.consumed
+			end
+			local res = {
+				curr_load = pwr.curr_load,             -- network storage value
+				max_capa = pwr.max_capa,               -- network storage capacity
+				consumed = consumed,                   -- consumed power by consumers 
+				provided = provided,                   -- provided power by generators 
+				available = available,                 -- max. available generator power
+				netw_num = networks.netw_num(netID),   -- network number
+			}
+			pwr.consumed = 0
+			pwr.provided = 0
+			pwr.available = 0
+			return res
+		end
+	end
+	return DEFAULT_DATA
+end

networks/settingtypes.txt

@@ -0,0 +1,2 @@
+# Enable some nodes for testing/demo purposes
+networks_test_enabled (test nodes enabled) bool false

networks/test/test_control.lua

@@ -0,0 +1,139 @@
+--[[
+
+	Networks
+	========
+
+	Copyright (C) 2021 Joachim Stolberg
+
+	AGPL v3
+	See LICENSE.txt for more information
+
+]]--
+
+-- for lazy programmers
+local P2S = function(pos) if pos then return minetest.pos_to_string(pos) end end
+local S2P = minetest.string_to_pos
+local M = minetest.get_meta
+
+local Cable = ...
+local power = networks.power
+local control = networks.control
+
+-------------------------------------------------------------------------------
+-- Client (sender)
+-------------------------------------------------------------------------------
+minetest.register_node("networks:client", {
+	description = "Client",
+	tiles = {
+		-- up, down, right, left, back, front
+		'networks_con.png^[colorize:#F05100:60',
+		'networks_con.png^[colorize:#F05100:60',
+		'networks_con.png^[colorize:#F05100:60',
+		'networks_con.png^[colorize:#F05100:60',
+		'networks_con.png^[colorize:#F05100:60',
+		'networks_conn.png^[colorize:#F05100:60',
+	},
+	after_place_node = function(pos)
+		local outdir = networks.side_to_outdir(pos, "F")
+		M(pos):set_int("outdir", outdir)
+		M(pos):set_string("infotext", "off")
+		Cable:after_place_node(pos, {outdir})	
+		tubelib2.init_mem(pos)
+	end,
+	after_dig_node = function(pos, oldnode, oldmetadata)
+		local outdir = tonumber(oldmetadata.fields.outdir or 0)
+		Cable:after_dig_node(pos, {outdir})
+		tubelib2.del_mem(pos)
+	end,
+	on_rightclick = function(pos, node, clicker)
+		local mem = tubelib2.get_mem(pos)
+		local outdir = M(pos):get_int("outdir")
+		local cnt
+		if mem.on then
+			cnt = control.send(pos, Cable, outdir, "server", "off")
+			M(pos):set_string("infotext", "off")
+			mem.on = false
+		else
+			cnt = control.send(pos, Cable, outdir, "server", "on")
+			M(pos):set_string("infotext", "on")
+			mem.on = true
+		end
+		print("Command sent to " .. cnt .. " nodes.")
+	end,
+	paramtype2 = "facedir",
+	on_rotate = screwdriver.disallow,
+	is_ground_content = false,
+	groups = {crumbly = 2, cracky = 2, snappy = 2},
+	sounds = default.node_sound_defaults(),
+})
+
+power.register_nodes({"networks:client"}, Cable, "client")
+control.register_nodes({"networks:client"}, {}) -- no callbacks
+
+-------------------------------------------------------------------------------
+-- Server (receiver)
+-------------------------------------------------------------------------------
+local function swap_node(pos, name)
+	local node = tubelib2.get_node_lvm(pos)
+	if node.name == name then
+		return
+	end
+	node.name = name
+	minetest.swap_node(pos, node)
+end
+
+minetest.register_node("networks:server_off", {
+	description = "Server",
+	tiles = {
+		-- up, down, right, left, back, front
+		"networks_sto.png^[colorize:#F05100:60",
+	},
+	after_place_node = function(pos)
+		Cable:after_place_node(pos)		
+	end,
+	after_dig_node = function(pos)
+		Cable:after_dig_node(pos)
+	end,
+	paramtype2 = "facedir",
+	on_rotate = screwdriver.disallow,
+	is_ground_content = false,
+	groups = {crumbly = 2, cracky = 2, snappy = 2},
+	sounds = default.node_sound_defaults(),
+})
+
+minetest.register_node("networks:server_on", {
+	description = "Server",
+	tiles = {
+		-- up, down, right, left, back, front
+		"networks_sto.png^[colorize:#F05100:60",
+	},
+	after_place_node = function(pos)
+		Cable:after_place_node(pos)		
+	end,
+	after_dig_node = function(pos)
+		Cable:after_dig_node(pos)
+	end,
+	paramtype = "light",
+	light_source = 8,	
+	paramtype2 = "facedir",
+	drop = "networks:server_off",
+	groups = {crumbly = 2, cracky = 2, snappy = 2, not_in_creative_inventory = 1},
+	is_ground_content = false,
+	sounds = default.node_sound_defaults(),
+})
+
+power.register_nodes({"networks:server_off", "networks:server_on"}, Cable, "server")
+control.register_nodes({"networks:server_off", "networks:server_on"}, {
+		on_receive = function(pos, tlib2, topic, payload)
+			if topic == "on" then
+				swap_node(pos, "networks:server_on")
+			elseif topic == "off" then
+				swap_node(pos, "networks:server_off")
+			end
+		end,
+		on_request = function(pos, tlib2, topic)
+			return false
+		end,
+	}
+)
+

networks/test/test_liquid.lua

@@ -0,0 +1,430 @@
+--[[
+
+	Networks
+	========
+
+	Copyright (C) 2021 Joachim Stolberg
+
+	AGPL v3
+	See LICENSE.txt for more information
+
+]]--
+
+-- for lazy programmers
+local P2S = function(pos) if pos then return minetest.pos_to_string(pos) end end
+local S2P = minetest.string_to_pos
+local M = minetest.get_meta
+
+local CYCLE_TIME = 2
+local STORAGE_CAPA = 500
+local AMOUNT = 2
+
+local liquid = networks.liquid
+
+-------------------------------------------------------------------------------
+-- Pipe
+-------------------------------------------------------------------------------
+local Pipe = tubelib2.Tube:new({
+	dirs_to_check = {1,2,3,4,5,6},
+	max_tube_length = 100, 
+	tube_type = "liq",
+	primary_node_names = {"networks:pipeS", "networks:pipeA", "networks:valve_on"}, 
+	secondary_node_names = {},  -- Names will be added via 'liquids.register_nodes'
+	after_place_tube = function(pos, param2, tube_type, num_tubes, tbl)
+		local name = minetest.get_node(pos).name
+		if name == "networks:valve_on" then
+			minetest.swap_node(pos, {name = "networks:valve_on", param2 = param2})
+		elseif name == "networks:valve_off" then
+			minetest.swap_node(pos, {name = "networks:valve_off", param2 = param2})
+		else
+			minetest.swap_node(pos, {name = "networks:pipe"..tube_type, param2 = param2})
+		end
+	end,
+})
+
+-- Use global callback instead of node related functions
+Pipe:register_on_tube_update2(function(pos, outdir, tlib2, node)
+	liquid.update_network(pos, outdir, tlib2, node)
+end)
+
+minetest.register_node("networks:pipeS", {
+	description = "Pipe",
+	tiles = { -- Top, base, right, left, front, back
+		"networks_cable.png^[colorize:#007577:60",
+		"networks_cable.png^[colorize:#007577:60",
+		"networks_cable.png^[colorize:#007577:60",
+		"networks_cable.png^[colorize:#007577:60",
+		"networks_hole.png",
+		"networks_hole.png",
+	},
+	after_place_node = function(pos, placer, itemstack, pointed_thing)
+		if not Pipe:after_place_tube(pos, placer, pointed_thing) then
+			minetest.remove_node(pos)
+			return true
+		end
+		return false
+	end,
+	after_dig_node = function(pos, oldnode, oldmetadata, digger)
+		Pipe:after_dig_tube(pos, oldnode, oldmetadata)
+	end,
+	paramtype2 = "facedir",
+	drawtype = "nodebox",
+	node_box = {
+		type = "fixed",
+		fixed = {
+			{-3/16, -3/16, -4/8,  3/16, 3/16, 4/8},
+		},
+	},
+	on_rotate = screwdriver.disallow,
+	paramtype = "light",
+	use_texture_alpha = "clip",
+	sunlight_propagates = true,
+	is_ground_content = false,
+	groups = {crumbly = 2, cracky = 2, snappy = 2},
+	sounds = default.node_sound_defaults(),
+})
+
+minetest.register_node("networks:pipeA", {
+	description = "Pipe",
+	tiles = { -- Top, base, right, left, front, back
+		"networks_cable.png^[colorize:#007577:60",
+		"networks_hole.png^[colorize:#007577:60",
+		"networks_cable.png^[colorize:#007577:60",
+		"networks_cable.png^[colorize:#007577:60",
+		"networks_cable.png^[colorize:#007577:60",
+		"networks_hole.png^[colorize:#007577:60",
+	},
+	after_dig_node = function(pos, oldnode, oldmetadata, digger)
+		Pipe:after_dig_tube(pos, oldnode, oldmetadata)
+	end,
+	paramtype2 = "facedir",
+	drawtype = "nodebox",
+	node_box = {
+		type = "fixed",
+		fixed = {
+			{-3/16, -4/8, -3/16,  3/16, 3/16,  3/16},
+			{-3/16, -3/16, -4/8,  3/16, 3/16, -3/16},
+		},
+	},
+	on_rotate = screwdriver.disallow,
+	paramtype = "light",
+	use_texture_alpha = "clip",
+	sunlight_propagates = true,
+	is_ground_content = false,
+	groups = {crumbly = 2, cracky = 2, snappy = 2, test_trowel = 1, not_in_creative_inventory=1},
+	sounds = default.node_sound_defaults(),
+	drop = "networks:pipeS",
+})
+
+local size = 3/16
+local Boxes = {
+	{{-size, -size,  size, size,  size, 0.5 }}, -- z+
+	{{-size, -size, -size, 0.5,   size, size}}, -- x+
+	{{-size, -size, -0.5,  size,  size, size}}, -- z-
+	{{-0.5,  -size, -size, size,  size, size}}, -- x-
+	{{-size, -0.5,  -size, size,  size, size}}, -- y-
+	{{-size, -size, -size, size,  0.5,  size}}, -- y+
+}
+
+local names = networks.register_junction("networks:junction", size, Boxes, Pipe, {
+	description = "Junction",
+	tiles = {"networks_junction.png^[colorize:#007577:60"},
+	after_place_node = function(pos, placer, itemstack, pointed_thing)
+		local name = "networks:junction" .. networks.junction_type(pos, Pipe)
+		minetest.swap_node(pos, {name = name, param2 = 0})
+		Pipe:after_place_node(pos)
+	end,
+	-- junction needs own 'tubelib2_on_update2' to be able to call networks.junction_type
+	tubelib2_on_update2 = function(pos, outdir, tlib2, node)
+		local name = "networks:junction" .. networks.junction_type(pos, Pipe)
+		minetest.swap_node(pos, {name = name, param2 = 0})
+		liquid.update_network(pos, 0, tlib2, node)
+	end,
+	after_dig_node = function(pos, oldnode, oldmetadata, digger)
+		Pipe:after_dig_node(pos)
+	end,
+	use_texture_alpha = "clip",
+	is_ground_content = false,
+	groups = {crumbly = 2, cracky = 2, snappy = 2},
+	sounds = default.node_sound_defaults(),
+}, 63)
+
+liquid.register_nodes(names, Pipe, "junc")
+
+-------------------------------------------------------------------------------
+-- Pump
+-------------------------------------------------------------------------------
+local function swap_node(pos, name)
+	local node = tubelib2.get_node_lvm(pos)
+	if node.name == name then
+		return
+	end
+	node.name = name
+	minetest.swap_node(pos, node)
+end
+
+local function turn_on(pos, mem)
+	swap_node(pos, "networks:pump_on")
+	M(pos):set_string("infotext", "pumping")
+	mem.running = true
+	-- enable marker cube
+	mem.dbg_cycles = 5
+	minetest.get_node_timer(pos):start(CYCLE_TIME)
+end
+
+local function turn_off(pos, mem)
+	swap_node(pos, "networks:pump_off")
+	M(pos):set_string("infotext", "off")
+	mem.running = false
+	minetest.get_node_timer(pos):stop()
+end
+
+local function on_rightclick(pos, node, clicker)
+	local mem = tubelib2.get_mem(pos)
+	if not mem.running then
+		turn_on(pos, mem)
+	else
+		turn_off(pos, mem)
+	end
+end
+
+local function pumping(pos)
+	local mem = tubelib2.get_mem(pos)
+	local outdir = M(pos):get_int("outdir")
+	local taken, name = liquid.take(pos, Pipe, networks.Flip[outdir], nil, AMOUNT, mem.dbg_cycles > 0)
+	if taken > 0 then
+		print("pumping " .. name .. " " .. taken)
+		local leftover = liquid.put(pos, Pipe, outdir, name, taken, mem.dbg_cycles > 0)
+		if leftover and leftover > 0 then
+			liquid.untake(pos, Pipe, networks.Flip[outdir], name, leftover)
+			if leftover == taken then
+				turn_off(pos, mem)
+				return false
+			end
+		end
+	else
+		print("pumping -")
+	end
+	mem.dbg_cycles = mem.dbg_cycles - 1
+	return true
+end
+
+local function after_place_node(pos)
+	local outdir = networks.side_to_outdir(pos, "B")
+	M(pos):set_int("outdir", outdir)
+	Pipe:after_place_node(pos, {outdir})		
+	M(pos):set_string("infotext", "off")
+	tubelib2.init_mem(pos)
+end
+
+local function after_dig_node(pos, oldnode, oldmetadata)
+	local outdir = tonumber(oldmetadata.fields.outdir or 0)
+	Pipe:after_dig_node(pos, {outdir})
+	tubelib2.del_mem(pos)
+end
+
+minetest.register_node("networks:pump_off", {
+	description = "Pump",
+	tiles = {
+		-- up, down, right, left, back, front
+		'networks_arrow.png^[colorize:#007577:60',
+		'networks_pump.png^[colorize:#007577:60',
+		'networks_pump.png^[colorize:#007577:60',
+		'networks_pump.png^[colorize:#007577:60',
+		'networks_conn.png^[colorize:#007577:60',
+		'networks_conn.png^[colorize:#007577:60',
+	},
+	after_place_node = after_place_node,
+	after_dig_node = after_dig_node,
+	on_timer = pumping,
+	on_rightclick = on_rightclick,
+	paramtype2 = "facedir",
+	on_rotate = screwdriver.disallow,
+	is_ground_content = false,
+	groups = {crumbly = 2, cracky = 2, snappy = 2},
+	sounds = default.node_sound_defaults(),
+})
+
+minetest.register_node("networks:pump_on", {
+	description = "Pump",
+	tiles = {
+		-- up, down, right, left, back, front
+		'networks_arrow.png^[colorize:#007577:60',
+		'networks_pump.png^[colorize:#007577:60',
+		'networks_pump.png^[colorize:#007577:60',
+		'networks_pump.png^[colorize:#007577:60',
+		'networks_conn.png^[colorize:#007577:60',
+		'networks_conn.png^[colorize:#007577:60',
+	},
+	after_place_node = after_place_node,
+	after_dig_node = after_dig_node,
+	on_timer = pumping,
+	on_rightclick = on_rightclick,
+	paramtype = "light",
+	light_source = 8,	
+	paramtype2 = "facedir",
+	diggable = false,
+	drop = "",
+	groups = {not_in_creative_inventory = 1},
+	is_ground_content = false,
+	sounds = default.node_sound_defaults(),
+})
+
+-- Pumps have to provide one output and one input side
+liquid.register_nodes({"networks:pump_off", "networks:pump_on"}, Pipe, "pump", {"F", "B"}, {})
+
+-------------------------------------------------------------------------------
+-- Tank
+-------------------------------------------------------------------------------
+local function register_tank(name, description, liquid_name, liquid_amount)
+	minetest.register_node(name, {
+		description = description,
+		tiles = {
+			-- up, down, right, left, back, front
+			"networks_tank.png^[colorize:#007577:60",
+			"networks_tank.png^[colorize:#007577:60",
+			"networks_tank.png^[colorize:#007577:60",
+			"networks_tank.png^[colorize:#007577:60",
+			"networks_tank.png^[colorize:#007577:60",
+			'networks_tank.png^[colorize:#007577:60',
+		},
+		after_place_node = function(pos)
+			Pipe:after_place_node(pos)		
+			local mem = tubelib2.init_mem(pos)
+			mem.liquid = {}
+			mem.liquid.name = liquid_name
+			mem.liquid.amount = liquid_amount
+			M(pos):set_string("infotext", networks.liquid.get_item(mem))
+			minetest.get_node_timer(pos):start(CYCLE_TIME)
+		end,
+		after_dig_node = function(pos, oldnode, oldmetadata)
+			Pipe:after_dig_node(pos)
+			tubelib2.del_mem(pos)
+		end,
+		on_timer = function(pos, elapsed)
+			local mem = tubelib2.get_mem(pos)
+			M(pos):set_string("infotext", networks.liquid.get_item(mem))
+			return true
+		end,
+		paramtype2 = "facedir",
+		on_rotate = screwdriver.disallow,
+		is_ground_content = false,
+		groups = {crumbly = 2, cracky = 2, snappy = 2},
+		sounds = default.node_sound_defaults(),
+	})
+end
+
+-- 3 types of test tanks
+register_tank("networks:tank1", "Water Tank", "water", STORAGE_CAPA)
+register_tank("networks:tank2", "Milk Tank", "milk", STORAGE_CAPA)
+register_tank("networks:tank3", "Empty Tank", nil, 0)
+
+liquid.register_nodes({"networks:tank1", "networks:tank2", "networks:tank3"}, 
+	Pipe, "tank", nil, {
+		capa = STORAGE_CAPA,
+		peek = function(pos, indir)
+			local mem = tubelib2.get_mem(pos)
+			return liquid.srv_peek(mem)
+		end,
+		put = function(pos, indir, name, amount)
+			local mem = tubelib2.get_mem(pos)
+			return liquid.srv_put(mem, name, amount, STORAGE_CAPA)
+		end,
+		take = function(pos, indir, name, amount)
+			local mem = tubelib2.get_mem(pos)
+			return liquid.srv_take(mem, name, amount)
+		end,
+		untake = function(pos, indir, name, amount)
+			local mem = tubelib2.get_mem(pos)
+			return liquid.srv_put(mem, name, amount, STORAGE_CAPA)
+		end,
+	}
+)
+
+-------------------------------------------------------------------------------
+-- Valve
+-------------------------------------------------------------------------------
+local node_box = {
+	type = "fixed",
+	fixed = {
+		{-5/16, -5/16, -4/8,  5/16, 5/16, 4/8},
+	},
+}
+
+-- The on-valve is a "primary node" like pipes
+minetest.register_node("networks:valve_on", {
+	description = "Valve",
+	paramtype = "light",
+	drawtype = "nodebox",
+	node_box = node_box,
+	tiles = {
+		"networks_switch_on.png^[transformR90^[colorize:#007577:60",
+		"networks_switch_on.png^[transformR90^[colorize:#007577:60",
+		"networks_switch_on.png^[colorize:#007577:60",
+		"networks_switch_on.png^[colorize:#007577:60",
+		"networks_switch_hole.png^[colorize:#007577:60",
+		"networks_switch_hole.png^[colorize:#007577:60",
+	},
+	after_place_node = function(pos, placer, itemstack, pointed_thing)
+		if not Pipe:after_place_tube(pos, placer, pointed_thing) then
+			minetest.remove_node(pos)
+			return true
+		end
+		return false
+	end,
+	on_rightclick = function(pos, node, clicker)
+		if liquid.turn_valve_off(pos, Pipe, "networks:valve_off", "networks:valve_on") then
+			minetest.sound_play("doors_glass_door_open", {
+				pos = pos, 
+				gain = 1,
+				max_hear_distance = 5})
+		end
+	end,
+	after_dig_node = function(pos, oldnode, oldmetadata, digger)
+		Pipe:after_dig_tube(pos, oldnode, oldmetadata)
+	end,
+	paramtype2 = "facedir",
+	on_rotate = screwdriver.disallow,
+	use_texture_alpha = "clip",
+	sunlight_propagates = true,
+	is_ground_content = false,
+	groups = {crumbly = 2, cracky = 2, snappy = 2},
+	sounds = default.node_sound_defaults(),
+})
+
+-- The off-valve is a "secondary node" without connection sides
+minetest.register_node("networks:valve_off", {
+	description = "Valve",
+	paramtype = "light",
+	drawtype = "nodebox",
+	node_box = node_box,
+	tiles = {
+		"networks_switch_off.png^[transformR90^[colorize:#007577:60",
+		"networks_switch_off.png^[transformR90^[colorize:#007577:60",
+		"networks_switch_off.png^[colorize:#007577:60",
+		"networks_switch_off.png^[colorize:#007577:60",
+		"networks_switch_hole.png^[colorize:#007577:60",
+		"networks_switch_hole.png^[colorize:#007577:60",
+	},
+	on_rightclick = function(pos, node, clicker)
+		if liquid.turn_valve_on(pos, Pipe, "networks:valve_off", "networks:valve_on") then
+			minetest.sound_play("doors_glass_door_open", {
+				pos = pos, 
+				gain = 1,
+				max_hear_distance = 5})
+		end
+	end,
+	after_dig_node = function(pos, oldnode, oldmetadata, digger)
+		Pipe:after_dig_node(pos)
+	end,
+	paramtype2 = "facedir",
+	on_rotate = screwdriver.disallow,
+	use_texture_alpha = "clip",
+	sunlight_propagates = true,
+	is_ground_content = false,
+	drop = "networks:valve_on",
+	groups = {crumbly = 2, cracky = 2, snappy = 2, test_trowel = 1, not_in_creative_inventory = 1},
+	sounds = default.node_sound_defaults(),
+})
+
+liquid.register_nodes({"networks:valve_off"}, Pipe, "tank", {}, {})

networks/test/test_power.lua

@@ -0,0 +1,585 @@
+--[[
+
+	Networks
+	========
+
+	Copyright (C) 2021 Joachim Stolberg
+
+	AGPL v3
+	See LICENSE.txt for more information
+
+]]--
+
+-- for lazy programmers
+local P2S = function(pos) if pos then return minetest.pos_to_string(pos) end end
+local S2P = minetest.string_to_pos
+local M = minetest.get_meta
+
+local CYCLE_TIME = 2
+local STORAGE_CAPA = 500
+local GEN_MAX = 20
+local CON_MAX = 5
+local HIDDEN = true   -- enable/disable hidden nodes
+
+local function round(val)
+	if val > 100 then
+		return math.floor(val + 0.5)
+	elseif val > 10 then
+		return math.floor((val * 10) + 0.5) / 10
+	else
+		return math.floor((val * 100) + 0.5) / 100
+	end
+end
+
+local power = networks.power
+
+-------------------------------------------------------------------------------
+-- Cable
+-------------------------------------------------------------------------------
+local Cable = tubelib2.Tube:new({
+	dirs_to_check = {1,2,3,4,5,6},
+	max_tube_length = 100, 
+	tube_type = "pwr",
+	primary_node_names = {"networks:cableS", "networks:cableA", "networks:switch_on"}, 
+	secondary_node_names = {},  -- Names will be added via 'power.register_nodes'
+	after_place_tube = function(pos, param2, tube_type, num_tubes, tbl)
+		local name = minetest.get_node(pos).name
+		if name == "networks:switch_on" or name == "networks:switch_off" then
+			minetest.swap_node(pos, {name = name, param2 = param2 % 32})
+		elseif not networks.hidden_name(pos) then
+			minetest.swap_node(pos, {name = "networks:cable"..tube_type, param2 = param2 % 32})
+		end
+		M(pos):set_int("netw_param2", param2)
+	end,
+})
+
+if HIDDEN then
+	-- Enable hidden cables
+	networks.use_metadata(Cable)
+	networks.register_hidden_message("Use the tool to remove the node.")
+	networks.register_filling_items({
+		"default:stone",
+		"default:stonebrick",
+		"default:stone_block",
+		"default:clay",
+		"default:snowblock",
+		"default:ice",
+		"default:glass",
+		"default:obsidian_glass",
+		"default:brick",
+		"default:tree",
+		"default:wood",
+		"default:jungletree",
+		"default:junglewood",
+		"default:pine_tree",
+		"default:pine_wood",
+		"default:acacia_tree",
+		"default:acacia_wood",
+		"default:aspen_tree",
+		"default:aspen_wood",
+		"default:steelblock",
+		"default:copperblock",
+		"default:tinblock",
+		"default:bronzeblock",
+		"default:goldblock",
+		"default:mese",
+		"default:diamondblock",
+	})
+end	
+
+-- Use global callback instead of node related functions
+Cable:register_on_tube_update2(function(pos, outdir, tlib2, node)
+	power.update_network(pos, outdir, tlib2, node)
+end)
+
+minetest.register_node("networks:cableS", {
+	description = "Cable",
+	tiles = { -- Top, base, right, left, front, back
+		"networks_cable.png",
+		"networks_cable.png",
+		"networks_cable.png",
+		"networks_cable.png",
+		"networks_hole.png",
+		"networks_hole.png",
+	},
+	after_place_node = function(pos, placer, itemstack, pointed_thing)
+		if not Cable:after_place_tube(pos, placer, pointed_thing) then
+			minetest.remove_node(pos)
+			return true
+		end
+		return false
+	end,
+	after_dig_node = function(pos, oldnode, oldmetadata, digger)
+		Cable:after_dig_tube(pos, oldnode, oldmetadata)
+	end,
+	paramtype2 = "facedir",
+	drawtype = "nodebox",
+	node_box = {
+		type = "fixed",
+		fixed = {
+			{-3/16, -3/16, -4/8,  3/16, 3/16, 4/8},
+		},
+	},
+	on_rotate = screwdriver.disallow,
+	paramtype = "light",
+	use_texture_alpha = "clip",
+	sunlight_propagates = true,
+	is_ground_content = false,
+	groups = {crumbly = 2, cracky = 2, snappy = 2, test_trowel = 1},
+	sounds = default.node_sound_defaults(),
+})
+
+minetest.register_node("networks:cableA", {
+	description = "Cable",
+	tiles = { -- Top, base, right, left, front, back
+		"networks_cable.png",
+		"networks_hole.png",
+		"networks_cable.png",
+		"networks_cable.png",
+		"networks_cable.png",
+		"networks_hole.png",
+	},
+	after_dig_node = function(pos, oldnode, oldmetadata, digger)
+		Cable:after_dig_tube(pos, oldnode, oldmetadata)
+	end,
+	paramtype2 = "facedir",
+	drawtype = "nodebox",
+	node_box = {
+		type = "fixed",
+		fixed = {
+			{-3/16, -4/8, -3/16,  3/16, 3/16,  3/16},
+			{-3/16, -3/16, -4/8,  3/16, 3/16, -3/16},
+		},
+	},
+	on_rotate = screwdriver.disallow,
+	paramtype = "light",
+	use_texture_alpha = "clip",
+	sunlight_propagates = true,
+	is_ground_content = false,
+	groups = {crumbly = 2, cracky = 2, snappy = 2, test_trowel = 1, not_in_creative_inventory=1},
+	sounds = default.node_sound_defaults(),
+	drop = "networks:cableS",
+})
+
+local size = 3/16
+local Boxes = {
+	{{-size, -size,  size, size,  size, 0.5 }}, -- z+
+	{{-size, -size, -size, 0.5,   size, size}}, -- x+
+	{{-size, -size, -0.5,  size,  size, size}}, -- z-
+	{{-0.5,  -size, -size, size,  size, size}}, -- x-
+	{{-size, -0.5,  -size, size,  size, size}}, -- y-
+	{{-size, -size, -size, size,  0.5,  size}}, -- y+
+}
+
+local names = networks.register_junction("networks:junction", size, Boxes, Cable, {
+	description = "Junction",
+	tiles = {"networks_junction.png"},
+	after_place_node = function(pos, placer, itemstack, pointed_thing)
+		local name = "networks:junction"..networks.junction_type(pos, Cable)
+		minetest.swap_node(pos, {name = name, param2 = 0})
+		Cable:after_place_node(pos)
+	end,
+	-- junction needs own 'tubelib2_on_update2' to be able to call networks.junction_type
+	tubelib2_on_update2 = function(pos, outdir, tlib2, node)
+		if not networks.hidden_name(pos) then
+			local name = "networks:junction" .. networks.junction_type(pos, Cable)
+			minetest.swap_node(pos, {name = name, param2 = 0})
+		end
+		power.update_network(pos, 0, tlib2, node)
+	end,
+	after_dig_node = function(pos, oldnode, oldmetadata, digger)
+		Cable:after_dig_node(pos)
+	end,
+	use_texture_alpha = "clip",
+	is_ground_content = false,
+	groups = {crumbly = 2, cracky = 2, snappy = 2, test_trowel = 1},
+	sounds = default.node_sound_defaults(),
+}, 63)
+
+power.register_nodes(names, Cable, "junc")
+
+-------------------------------------------------------------------------------
+-- Generator
+-------------------------------------------------------------------------------
+minetest.register_node("networks:generator", {
+	description = "Generator",
+	tiles = {
+		-- up, down, right, left, back, front
+		'networks_gen.png',
+		'networks_gen.png',
+		'networks_gen.png',
+		'networks_gen.png',
+		'networks_gen.png',
+		'networks_conn.png',
+	},
+	after_place_node = function(pos)
+		local outdir = networks.side_to_outdir(pos, "F")
+		M(pos):set_int("outdir", outdir)
+		Cable:after_place_node(pos, {outdir})		
+		M(pos):set_string("infotext", "off")
+		tubelib2.init_mem(pos)
+	end,
+	after_dig_node = function(pos, oldnode, oldmetadata)
+		local outdir = tonumber(oldmetadata.fields.outdir or 0)
+		Cable:after_dig_node(pos, {outdir})
+		tubelib2.del_mem(pos)
+	end,
+	on_timer = function(pos, elapsed)
+		local outdir = M(pos):get_int("outdir")
+		local mem = tubelib2.get_mem(pos)
+		mem.provided = power.provide_power(pos, Cable, outdir, GEN_MAX)
+		mem.load = power.get_storage_load(pos, Cable, outdir, GEN_MAX)
+		M(pos):set_string("infotext", "providing "..round(mem.provided))
+		return true
+	end,
+	on_rightclick = function(pos, node, clicker)
+		local mem = tubelib2.get_mem(pos)
+		if mem.running then
+			mem.running = false
+			M(pos):set_string("infotext", "off")
+			minetest.get_node_timer(pos):stop()
+		else
+			mem.provided = mem.provided or 0
+			mem.running = true
+			M(pos):set_string("infotext", "providing "..round(mem.provided))
+			minetest.get_node_timer(pos):start(CYCLE_TIME)
+		end
+		local outdir = M(pos):get_int("outdir")
+		power.start_storage_calc(pos, Cable, outdir)
+	end,
+	get_generator_data = function(pos, outdir, tlib2)
+		local mem = tubelib2.get_mem(pos)
+		if mem.running then
+			-- generator storage capa = 2 * performance
+			return {level = (mem.load or 0) / GEN_MAX, perf = GEN_MAX, capa = GEN_MAX * 2} 
+		end
+	end,
+	paramtype2 = "facedir",
+	on_rotate = screwdriver.disallow,
+	is_ground_content = false,
+	groups = {crumbly = 2, cracky = 2, snappy = 2},
+	sounds = default.node_sound_defaults(),
+})
+
+-- Generators have to provide one output side
+power.register_nodes({"networks:generator"}, Cable, "gen", {"F"})
+
+-------------------------------------------------------------------------------
+-- Storage
+-------------------------------------------------------------------------------
+minetest.register_node("networks:storage", {
+	description = "Storage",
+	tiles = {
+		-- up, down, right, left, back, front
+		"networks_sto.png",
+		"networks_sto.png",
+		"networks_sto.png",
+		"networks_sto.png",
+		"networks_sto.png",
+		'networks_conn.png',
+	},
+	after_place_node = function(pos)
+		local outdir = networks.side_to_outdir(pos, "F")
+		M(pos):set_int("outdir", outdir)
+		Cable:after_place_node(pos, {outdir})		
+		tubelib2.init_mem(pos)
+		M(pos):set_string("infotext", "off")
+	end,
+	after_dig_node = function(pos, oldnode, oldmetadata)
+		local outdir = tonumber(oldmetadata.fields.outdir or 0)
+		Cable:after_dig_node(pos, {outdir})
+		tubelib2.del_mem(pos)
+	end,
+	on_timer = function(pos, elapsed)
+		local mem = tubelib2.get_mem(pos)
+		local outdir = M(pos):get_int("outdir")
+		local data = power.get_storage_data(pos, Cable, outdir)
+		if data then
+			mem.load = data.level * STORAGE_CAPA
+			local percent = data.level * 100
+			M(pos):set_string("infotext", "level = "..round(percent)..", charging = "..data.charging)
+		end
+		return true
+	end,
+	on_rightclick = function(pos, node, clicker)
+		local mem = tubelib2.get_mem(pos)
+		if mem.running then
+			mem.running = false
+			M(pos):set_string("infotext", "off")
+			minetest.get_node_timer(pos):stop()
+		else
+			mem.provided = mem.provided or 0
+			mem.running = true
+			local percent = (mem.load or 0) / STORAGE_CAPA * 100
+			M(pos):set_string("infotext", "level = "..round(percent))
+			minetest.get_node_timer(pos):start(CYCLE_TIME)
+		end
+		local outdir = M(pos):get_int("outdir")
+		power.start_storage_calc(pos, Cable, outdir)
+	end,
+	get_storage_data = function(pos, outdir, tlib2)
+		local mem = tubelib2.get_mem(pos)
+		if mem.running then
+			return {level = (mem.load or 0) / STORAGE_CAPA, capa = STORAGE_CAPA}
+		end
+	end,
+	paramtype2 = "facedir",
+	on_rotate = screwdriver.disallow,
+	is_ground_content = false,
+	groups = {crumbly = 2, cracky = 2, snappy = 2},
+	sounds = default.node_sound_defaults(),
+})
+
+-- Storage nodes have to provide one input/output side
+power.register_nodes({"networks:storage"}, Cable, "sto", {"F"})
+
+-------------------------------------------------------------------------------
+-- Consumer
+-------------------------------------------------------------------------------
+local function swap_node(pos, name)
+	local node = tubelib2.get_node_lvm(pos)
+	if node.name == name then
+		return
+	end
+	node.name = name
+	minetest.swap_node(pos, node)
+end
+
+local function turn_on(pos)
+	swap_node(pos, "networks:consumer_on")
+	M(pos):set_string("infotext", "on")
+	local mem = tubelib2.get_mem(pos)
+	mem.running = true
+	minetest.get_node_timer(pos):start(CYCLE_TIME)
+end
+
+local function turn_off(pos)
+	swap_node(pos, "networks:consumer")
+	M(pos):set_string("infotext", "off")
+	local mem = tubelib2.get_mem(pos)
+	mem.running = false
+	minetest.get_node_timer(pos):stop()
+end
+
+local function on_rightclick(pos, node, clicker)
+	local mem = tubelib2.get_mem(pos)
+	if not mem.running and power.power_available(pos, Cable) then
+		turn_on(pos)
+	else
+		turn_off(pos)
+	end
+end
+
+local function after_place_node(pos)
+	M(pos):set_string("infotext", "off")
+	Cable:after_place_node(pos)
+	tubelib2.init_mem(pos)
+end
+
+local function after_dig_node(pos, oldnode)
+	Cable:after_dig_node(pos)
+	tubelib2.del_mem(pos)
+end
+
+minetest.register_node("networks:consumer", {
+	description = "Consumer",
+	tiles = {'networks_con.png^[colorize:#000000:50'},
+	
+	on_timer = function(pos, elapsed)
+		local consumed = power.consume_power(pos, Cable, nil, CON_MAX)
+		if consumed == CON_MAX then
+			swap_node(pos, "networks:consumer_on")
+			M(pos):set_string("infotext", "on")
+		end
+		return true
+	end,
+	on_rightclick = on_rightclick,
+	after_place_node = after_place_node,
+	after_dig_node = after_dig_node,
+	paramtype2 = "facedir",
+	groups = {choppy = 2, cracky = 2, crumbly = 2},
+	is_ground_content = false,
+	sounds = default.node_sound_defaults(),
+})
+
+minetest.register_node("networks:consumer_on", {
+	description = "Consumer",
+	tiles = {'networks_con.png'},
+
+	on_timer = function(pos, elapsed)
+		local consumed = power.consume_power(pos, Cable, nil, CON_MAX)
+		if consumed < CON_MAX then
+			swap_node(pos, "networks:consumer")
+			M(pos):set_string("infotext", "no power")
+		end
+		return true
+	end,
+	on_rightclick = on_rightclick,
+	after_place_node = after_place_node,
+	after_dig_node = after_dig_node,
+	paramtype = "light",
+	light_source = minetest.LIGHT_MAX,	
+	paramtype2 = "facedir",
+	diggable = false,
+	drop = "",
+	groups = {not_in_creative_inventory = 1},
+	is_ground_content = false,
+	sounds = default.node_sound_defaults(),
+})
+
+-- Consumer can provide dedicated input sides, otherwise all sides are used
+power.register_nodes({"networks:consumer", "networks:consumer_on"}, Cable, "con")
+
+-------------------------------------------------------------------------------
+-- Switch/valve
+-------------------------------------------------------------------------------
+local node_box = {
+	type = "fixed",
+	fixed = {
+		{-5/16, -5/16, -4/8,  5/16, 5/16, 4/8},
+	},
+}
+
+-- The on-switch is a "primary node" like cables
+minetest.register_node("networks:switch_on", {
+	description = "Switch",
+	paramtype = "light",
+	drawtype = "nodebox",
+	node_box = node_box,
+	tiles = {
+		"networks_switch_on.png^[transformR90",
+		"networks_switch_on.png^[transformR90",
+		"networks_switch_on.png",
+		"networks_switch_on.png",
+		"networks_switch_hole.png",
+		"networks_switch_hole.png",
+	},
+	after_place_node = function(pos, placer, itemstack, pointed_thing)
+		if not Cable:after_place_tube(pos, placer, pointed_thing) then
+			minetest.remove_node(pos)
+			return true
+		end
+		return false
+	end,
+	on_rightclick = function(pos, node, clicker)
+		if power.turn_switch_off(pos, Cable, "networks:switch_off", "networks:switch_on") then
+			minetest.sound_play("doors_glass_door_open", {
+				pos = pos, 
+				gain = 1,
+				max_hear_distance = 5})
+		end
+	end,
+	after_dig_node = function(pos, oldnode, oldmetadata, digger)
+		Cable:after_dig_tube(pos, oldnode, oldmetadata)
+	end,
+	paramtype2 = "facedir",
+	on_rotate = screwdriver.disallow,
+	use_texture_alpha = "clip",
+	sunlight_propagates = true,
+	is_ground_content = false,
+	groups = {crumbly = 2, cracky = 2, snappy = 2, test_trowel = 1},
+	sounds = default.node_sound_defaults(),
+})
+
+-- The off-switch is a "secondary node" without connection sides
+minetest.register_node("networks:switch_off", {
+	description = "Switch",
+	paramtype = "light",
+	drawtype = "nodebox",
+	node_box = node_box,
+	tiles = {
+		"networks_switch_off.png^[transformR90",
+		"networks_switch_off.png^[transformR90",
+		"networks_switch_off.png",
+		"networks_switch_off.png",
+		"networks_switch_hole.png",
+		"networks_switch_hole.png",
+	},
+	on_rightclick = function(pos, node, clicker)
+		if power.turn_switch_on(pos, Cable, "networks:switch_off", "networks:switch_on") then
+			minetest.sound_play("doors_glass_door_open", {
+				pos = pos, 
+				gain = 1,
+				max_hear_distance = 5})
+		end
+	end,
+	after_dig_node = function(pos, oldnode, oldmetadata, digger)
+		Cable:after_dig_node(pos)
+	end,
+	paramtype2 = "facedir",
+	on_rotate = screwdriver.disallow,
+	use_texture_alpha = "clip",
+	sunlight_propagates = true,
+	is_ground_content = false,
+	drop = "networks:switch_on",
+	groups = {crumbly = 2, cracky = 2, snappy = 2, test_trowel = 1, not_in_creative_inventory = 1},
+	sounds = default.node_sound_defaults(),
+})
+
+power.register_nodes({"networks:switch_off"}, Cable, "con", {})
+
+-------------------------------------------------------------------------------
+-- Hide/open tool
+-------------------------------------------------------------------------------
+-- Hide or open a node
+local function replace_node(itemstack, placer, pointed_thing)
+	if pointed_thing.type == "node" then
+		local pos = pointed_thing.under
+		local name = placer:get_player_name()
+		if minetest.is_protected(pos, name) then
+			return
+		end
+		local node = minetest.get_node(pos)
+		local res = false
+		if minetest.get_item_group(node.name, "test_trowel") == 1 then
+			res = networks.hide_node(pos, node, placer)
+		elseif networks.hidden_name(pos) then
+			res = networks.open_node(pos, node, placer)
+		end
+		if res then
+			minetest.sound_play("default_dig_snappy", {
+				pos = pos, 
+				gain = 1,
+				max_hear_distance = 5})
+		elseif placer and placer.get_player_name then
+			minetest.chat_send_player(placer:get_player_name(), "Invalid fill material in inventory slot 1!")
+		end
+	end
+end
+
+minetest.register_tool("networks:tool", {
+	description = "Hide Tool\n(Fill material to the right of the tool)",
+	inventory_image = "networks_tool.png",
+	wield_image = "networks_tool.png",
+	use_texture_alpha = "clip",
+	groups = {cracky=1},
+	on_use = replace_node,
+	on_place = replace_node,
+	node_placement_prediction = "",
+	stack_max = 1,
+})
+
+-------------------------------------------------------------------------------
+-- Test Commands
+-------------------------------------------------------------------------------
+minetest.register_chatcommand("power_data", {
+    func = function(name)
+		local player = minetest.get_player_by_name(name)
+		local pos = player:get_pos()
+		pos.y = pos.y - 0.5
+		pos = vector.round(pos)
+		local data = power.get_network_data(pos, Cable)
+		if data then
+			local s = string.format("Netw %u: generated = %u/%u, consumed = %u, storage load = %u/%u",
+				data.netw_num, round(data.provided), 
+				data.available, round(data.consumed), 
+				round(data.curr_load), round(data.max_capa))
+			return true, s
+		end
+		return false, "No valid node position!"
+		
+    end
+})
+
+return Cable
+ 

networks/test/test_tool.lua

@@ -0,0 +1,165 @@
+--[[
+
+	Networks
+	========
+
+	Copyright (C) 2021 Joachim Stolberg
+
+	AGPL v3
+	See LICENSE.txt for more information
+
+]]--
+
+-- for lazy programmers
+local P2S = function(pos) if pos then return minetest.pos_to_string(pos) end end
+local S2P = minetest.string_to_pos
+local M = minetest.get_meta
+
+local power = networks.power
+local liquid = networks.liquid
+
+local function round(val)
+	return math.floor(val + 0.5)
+end
+
+local function get_list(tbl, sep)
+	local keys = {}
+	for k,v in pairs(tbl) do
+		if v then
+			keys[#keys + 1] = k
+		end
+	end
+	return table.concat(keys, sep)
+end
+
+local NetwTypes = false
+
+local function collect_netw_types()
+	NetwTypes = {}
+	for k,v in pairs(networks.registered_networks.power) do
+		NetwTypes[k] = "power"
+	end
+	for k,v in  pairs(networks.registered_networks.liquid) do
+		NetwTypes[k] = "liquid"
+	end
+end
+
+local function print_sides(pos, api, netw_type)
+	local t = {}
+	for _, dir in ipairs(networks.get_node_connection_dirs(pos, netw_type)) do
+		t[#t + 1]= tubelib2.dir_to_string(dir)
+	end
+	print("# " .. api .. " - " .. netw_type .. " dirs: " .. table.concat(t, ", "))
+end
+
+local function print_power_network_data(pos, api, netw, netw_type)
+	local tlib2 = networks.registered_networks[api][netw_type]
+	local outdir = netw[netw_type].ntype == "junc" and 0 or nil
+	local data = power.get_network_data(pos, tlib2, outdir)
+	if netw then
+		print("- Number of network nodes: " .. (netw.num_nodes or 0))
+		print("- Number of generators: " .. #(netw.gen or {}))
+		print("- Number of consumers: " .. #(netw.con or {}))
+		print("- Number of storage systems: " .. #(netw.sto or {}))
+	end	
+	if data then
+		local s = string.format("- Netw %u: generated = %u/%u, consumed = %u, storage load = %u/%u",
+			data.netw_num, round(data.provided), 
+			data.available, round(data.consumed), 
+			round(data.curr_load), round(data.max_capa))
+		print(s)
+	else
+		print("- Node has no '" .. netw_type .. "' network!!!")
+	end
+end
+
+local function print_netID(pos, api, netw_type)
+	local tlib2 = networks.registered_networks[api][netw_type]
+	for _,outdir in ipairs(networks.get_outdirs(pos, tlib2)) do
+		local netID = networks.get_netID(pos, outdir)
+		local s = tubelib2.dir_to_string(outdir)
+		if netID then
+			print("- " .. s .. ": netwNum for '" .. netw_type .. "': " .. networks.netw_num(netID))
+		else
+			print("- " .. s .. ": Node has no '" .. netw_type .. "' netID!!!")
+		end	
+	end
+end
+
+local function print_secondary_node(pos, api, netw_type)
+	local tlib2 = networks.registered_networks[api][netw_type]
+	if tlib2:is_secondary_node(pos) then
+		print("- Secondary node: true")
+	else
+		print("- Is no secondary node!!!")
+	end
+end
+
+local function print_valid_sides(name, api, netw_type)
+	local tlib2 = networks.registered_networks[api][netw_type]
+	local sides = tlib2.valid_node_contact_sides[name]
+	if sides then
+		print("- Valid node contact sides: " .. get_list(sides, ", "))
+	else
+		print("- Has no valid node contact sides!!!")
+	end
+end
+
+-- debug print of node related data
+local function debug_print(pos)
+	local node = minetest.get_node(pos)
+	local ndef = minetest.registered_nodes[node.name]
+	
+	if not NetwTypes then
+		collect_netw_types()
+	end
+	
+	if not ndef.networks then
+		print("No networks node!!!")
+		return
+	end
+	
+	print("########## " .. node.name .. " ###########")
+	
+	for netw_type,api in pairs(NetwTypes) do
+		if ndef.networks[netw_type] then
+			print_sides(pos, api, netw_type)
+			if api == "power" then
+				print_power_network_data(pos, api, ndef.networks, netw_type)
+			elseif api == "liquid" then
+				--print_liquid_network_data(pos, api, netw_type)
+			end
+			print_netID(pos, api, netw_type)
+			print_secondary_node(pos, api, netw_type)
+			print_valid_sides(node.name, api, netw_type)
+		end
+	end
+	
+	print("#####################")
+end
+
+local function action(itemstack, placer, pointed_thing)
+	if pointed_thing.type == "node" then
+		local pos = pointed_thing.under
+		networks.register_observe_pos(pos)
+		if placer:get_player_control().sneak then
+			debug_print(pos)
+		else
+			debug_print(pos)
+		end
+	else
+		networks.register_observe_pos(nil)
+	end
+end
+
+minetest.register_tool("networks:tool2", {
+	description = "Debugging Tool",
+	inventory_image = "networks_tool.png",
+	wield_image = "networks_tool.png",
+	use_texture_alpha = "clip",
+	groups = {cracky=1},
+	on_use = action,
+	on_place = action,
+	node_placement_prediction = "",
+	stack_max = 1,
+})

signs_bot/basis.lua

@@ -21,9 +21,9 @@ local S = signs_bot.S
 local lib = signs_bot.lib
 
 signs_bot.MAX_CAPA = 600
-local PWR_NEEDED = 8
 
 local CYCLE_TIME = 1
+local CYCLE_TIME2 = 2  -- for charging phase
 
 local function in_range(val, min, max)
 	if val < min then return min end
@@ -233,14 +233,14 @@ function signs_bot.stop_robot(base_pos, mem)
 	if mem.signal_request ~= true then
 		mem.running = false
 		if minetest.global_exists("techage") then
-			minetest.get_node_timer(base_pos):start(4)
+			minetest.get_node_timer(base_pos):start(CYCLE_TIME2)
 			mem.charging = true
 			mem.power_available = false
 		else
 			minetest.get_node_timer(base_pos):stop()
 			mem.charging = false
 		end
-		if mem.power_available then
+		if mem.charging then
 			signs_bot.infotext(base_pos, S("charging"))
 		else
 			signs_bot.infotext(base_pos, S("stopped"))
@@ -387,19 +387,6 @@ if minetest.global_exists("techage") then
 	drop = ""
 end
 
-local function on_power(pos)
-	local mem = tubelib2.get_mem(pos)
-	mem.power_available = true
-	mem.charging = true
-	signs_bot.infotext(pos, S("charging"))
-end
-
-local function on_nopower(pos)
-	local mem = tubelib2.get_mem(pos)
-	mem.power_available = false
-	signs_bot.infotext(pos, S("no power"))
-end
-
 minetest.register_node("signs_bot:box", {
 	description = S("Signs Bot Box"),
 	stack_max = 1,
@@ -478,31 +465,6 @@ minetest.register_node("signs_bot:box", {
 	on_timer = node_timer,
 	on_rotate = screwdriver.disallow,
 	
-	-- techage power definition
-	tubelib2_on_update2 = function(pos, outdir, tlib2, node) 
-		if minetest.global_exists("techage") then
-			techage.power.update_network(pos, outdir, tlib2)
-		end
-	end,
-	networks = {
-		ele1 = {
-			sides = {L=1, U=1, D=1, F=1, B=1},
-			ntype = "con1",
-			on_power = function(pos)
-				local mem = tubelib2.get_mem(pos)
-				mem.power_available = true
-				signs_bot.infotext(pos, S("charging"))
-			end,
-			on_nopower = function(pos)
-				local mem = tubelib2.get_mem(pos)
-				mem.power_available = false
-				signs_bot.infotext(pos, S("no power"))
-			end,
-			nominal = PWR_NEEDED,
-		}
-	},
-	-- techage power definition
-
 	drop = drop,
 	paramtype2 = "facedir",
 	is_ground_content = false,

signs_bot/commands.lua

@@ -156,6 +156,7 @@ end
 local function bot_error(base_pos, mem, err, cmd)
 	minetest.sound_play('signs_bot_error', {pos = base_pos})
 	minetest.sound_play('signs_bot_error', {pos = mem.robot_pos})
+	err = err or "unknown"
 	if cmd then
 		signs_bot.infotext(base_pos, err .. ":\n'" .. cmd .. "'")
 		mem.error = err .. ": '" .. cmd .. "'"

signs_bot/compost.lua

@@ -29,7 +29,7 @@ local function additem(mem, stack)
 	pos = {x = pos.x, y = pos.y - 1, z = pos.z}
 	node = minetest.get_node(pos)
 	ndef = minetest.registered_nodes[node.name]
-	if ndef.minecart_hopper_additem then
+	if ndef and ndef.minecart_hopper_additem then
 		return ndef.minecart_hopper_additem(pos, stack)
 	end
 	
@@ -47,7 +47,7 @@ local function takeitem(mem)
 	pos = {x = pos.x, y = pos.y - 1, z = pos.z}
 	node = minetest.get_node(pos)
 	ndef = minetest.registered_nodes[node.name]
-	if ndef.minecart_hopper_takeitem then
+	if ndef and ndef.minecart_hopper_takeitem then
 		return ndef.minecart_hopper_takeitem(pos, 1)
 	end
 end

signs_bot/init.lua

@@ -20,8 +20,8 @@ signs_bot.version = 1.08
 -- Test for MT 5.4 new string mode
 signs_bot.CLIP = minetest.features.use_texture_alpha_string_modes and "clip" or true
 
-if minetest.global_exists("techage") and techage.version < 0.25 then
+if minetest.global_exists("techage") and techage.version < 1.0 then
-	error("[signs_bot] Signs Bot requires techage version 0.25 or newer!")
+	error("[signs_bot] Signs Bot requires techage version 1.0 or newer!")
 end
 
 if tubelib2.version < 1.9 then

signs_bot/interpreter.lua

@@ -188,7 +188,7 @@ register_command("end", 0,
 register_command("call", 1,
 	function(base_pos, mem, addr)
 		if #mem.Stack > 99 then
-			return api.ERROR
+			return api.ERROR, "call stack overrun"
 		end
 		mem.Stack[#mem.Stack + 1] = mem.pc + 2
 		mem.pc = addr - 2
@@ -202,7 +202,7 @@ register_command("call", 1,
 register_command("return", 0,
 	function(base_pos, mem)
 		if #mem.Stack < 1 then
-			return api.ERROR
+			return api.ERROR, "no return address"
 		end
 		mem.pc = (mem.Stack[#mem.Stack] or 1) - 1
 		mem.Stack[#mem.Stack] = nil

signs_bot/techage.lua

@@ -8,19 +8,33 @@
 	GPLv3
 	See LICENSE.txt for more information
 	
-	Signs Bot: Bot Flap
+	Signs Bot: interface for techage
 
 ]]--
 
 -- Load support for I18n.
 local S = signs_bot.S
 
-local CYCLE_TIME = 4
+local MAX_CAPA = signs_bot.MAX_CAPA
+local PWR_NEEDED = 8
 
 if minetest.get_modpath("techage") then
 	
+	local function on_power(pos)
+		local mem = tubelib2.get_mem(pos)
+		mem.power_available = true
+		mem.charging = true
+		signs_bot.infotext(pos, S("charging"))
+	end
+
+	local function on_nopower(pos)
+		local mem = tubelib2.get_mem(pos)
+		mem.power_available = false
+		signs_bot.infotext(pos, S("no power"))
+	end
+
 	local Cable = techage.ElectricCable
-	local power = techage.power
+	local power = networks.power
 	
 	signs_bot.register_inventory({"techage:chest_ta2", "techage:chest_ta3", "techage:chest_ta4",
 			"techage:ta3_silo", "techage:ta4_silo", "techage:ta4_sensor_chest"}, {
@@ -164,12 +178,11 @@ send_cmnd 3465 pull*default:dirt*2]]),
     -- Bot in the box
 	function signs_bot.while_charging(pos, mem)
 		mem.capa = mem.capa or 0
-		if mem.power_available then
+		
 		if mem.capa < signs_bot.MAX_CAPA then
-				local taken = power.consumer_alive(pos, Cable, CYCLE_TIME)
+			local consumed = power.consume_power(pos, Cable, nil, PWR_NEEDED)
-				mem.capa = mem.capa + taken
+			mem.capa = mem.capa + consumed
 		else
-				power.consumer_stop(pos, Cable)
 			minetest.get_node_timer(pos):stop()
 			mem.charging = false
 			if not mem.running then
@@ -177,13 +190,10 @@ send_cmnd 3465 pull*default:dirt*2]]),
 			end
 			return false
 		end
-		else
-			power.consumer_start(pos, Cable, CYCLE_TIME)
-		end
 		return true
 	end
 	
-	Cable:add_secondary_node_names({"signs_bot:box"})
+	power.register_nodes({"signs_bot:box"}, Cable, "con")
 
 	techage.register_node({"signs_bot:box"}, {
 		on_inv_request = function(pos, in_dir, access_type)
@@ -267,8 +277,12 @@ send_cmnd 3465 pull*default:dirt*2]]),
 		end,
 	})	
 
+	techage.register_node_for_v1_transition({"signs_bot:box"}, function(pos, node)
+		power.update_network(pos, nil, Cable)
+	end)
 else
 	function signs_bot.formspec_battery_capa(max_capa, current_capa)
 		return ""
 	end
 end
+

ta4_addons/LICENSE.txt

@@ -0,0 +1,662 @@
+                    GNU AFFERO GENERAL PUBLIC LICENSE
+                       Version 3, 19 November 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+                            Preamble
+
+  The GNU Affero General Public License is a free, copyleft license for
+software and other kinds of works, specifically designed to ensure
+cooperation with the community in the case of network server software.
+
+  The licenses for most software and other practical works are designed
+to take away your freedom to share and change the works.  By contrast,
+our General Public Licenses are intended to guarantee your freedom to
+share and change all versions of a program--to make sure it remains free
+software for all its users.
+
+  When we speak of free software, we are referring to freedom, not
+price.  Our General Public Licenses are designed to make sure that you
+have the freedom to distribute copies of free software (and charge for
+them if you wish), that you receive source code or can get it if you
+want it, that you can change the software or use pieces of it in new
+free programs, and that you know you can do these things.
+
+  Developers that use our General Public Licenses protect your rights
+with two steps: (1) assert copyright on the software, and (2) offer
+you this License which gives you legal permission to copy, distribute
+and/or modify the software.
+
+  A secondary benefit of defending all users' freedom is that
+improvements made in alternate versions of the program, if they
+receive widespread use, become available for other developers to
+incorporate.  Many developers of free software are heartened and
+encouraged by the resulting cooperation.  However, in the case of
+software used on network servers, this result may fail to come about.
+The GNU General Public License permits making a modified version and
+letting the public access it on a server without ever releasing its
+source code to the public.
+
+  The GNU Affero General Public License is designed specifically to
+ensure that, in such cases, the modified source code becomes available
+to the community.  It requires the operator of a network server to
+provide the source code of the modified version running there to the
+users of that server.  Therefore, public use of a modified version, on
+a publicly accessible server, gives the public access to the source
+code of the modified version.
+
+  An older license, called the Affero General Public License and
+published by Affero, was designed to accomplish similar goals.  This is
+a different license, not a version of the Affero GPL, but Affero has
+released a new version of the Affero GPL which permits relicensing under
+this license.
+
+  The precise terms and conditions for copying, distribution and
+modification follow.
+
+                       TERMS AND CONDITIONS
+
+  0. Definitions.
+
+  "This License" refers to version 3 of the GNU Affero General Public License.
+
+  "Copyright" also means copyright-like laws that apply to other kinds of
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+
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+  You may convey a covered work in object code form under the terms
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+  "Additional permissions" are terms that supplement the terms of this
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+Additional permissions that are applicable to the entire Program shall
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+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
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+
+    This program is distributed in the hope that it will be useful,
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+
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+
+Also add information on how to contact you by electronic and paper mail.
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+
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+For more information on this, and how to apply and follow the GNU AGPL, see
+<https://www.gnu.org/licenses/>.
+

ta4_addons/LICENSE_GPL.txt

@@ -0,0 +1,674 @@
+ GNU GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+                            Preamble
+
+  The GNU General Public License is a free, copyleft license for
+software and other kinds of works.
+
+  The licenses for most software and other practical works are designed
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+GNU General Public License for most of our software; it applies also to
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+
+  When we speak of free software, we are referring to freedom, not
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+
+                       TERMS AND CONDITIONS
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ta4_addons/README.md

@@ -0,0 +1,77 @@
+# ta4_addons
+
+An extension mod for Minetest's [techage](https://github.com/joe7575/techage) mod to provide more TA4 devices.
+
+Currently, the following devices are implemented:
+
+- Touchscreen
+
+## License
+
+Copyright (C) 2020 Joachim Stolberg  
+Copyright (C) 2020 Thomas-S
+
+## Example Program for the Lua Controller
+
+**Init:**
+
+```lua
+$events(true)
+$loopcycle(0)
+
+TOUCHSCREEN_NUM = 338
+
+counter = 1
+
+$send_cmnd(TOUCHSCREEN_NUM, "remove_content")
+
+res = $send_cmnd(TOUCHSCREEN_NUM, "add_content", Store("type", "button", "w", 5, "label", counter))
+res2 = $send_cmnd(TOUCHSCREEN_NUM, "add_content", Store("type", "button", "w", 5, "y", 2, "label", counter))
+
+$print("ID: "..res)
+```
+
+**Loop:**
+
+```lua
+local num,msg = $get_msg(true)
+
+if num == tostring(TOUCHSCREEN_NUM) and msg.next then
+    for k,v in msg.next() do
+        if k == "button" then
+            counter = counter + 1
+            $print(res)
+            $send_cmnd(TOUCHSCREEN_NUM, "update_content", Store("type", "button", "w", "5", "label", counter, "id", res))
+            if counter > 10 then
+                $send_cmnd(TOUCHSCREEN_NUM, "remove_content", Store("id", res2))
+            else
+                $send_cmnd(TOUCHSCREEN_NUM, "update_content", Store("type", "button", "w", "5", "y", 2, "label", counter, "id", res2))
+            end
+        end
+        $print(k..": "..v)
+        $display(TOUCHSCREEN_NUM, 0, k)
+        $display(TOUCHSCREEN_NUM, 0, v)
+    end
+end
+```
+
+### Code
+Licensed under the GNU AGPL version 3 or later. See `LICENSE.txt`.
+
+The only exception is the file `markdown2lua.py` (by Joachim Stolberg), which is licensed under the GNU GPL version 3 or later.
+See `LICENSE_GPL.txt`.
+It is taken from the [ta4_jetpack](https://github.com/joe7575/ta4_jetpack) mod.
+
+### Textures
+
+`ta4_addons_touchscreen.png`:
+Based on [techage_display.png](https://github.com/joe7575/techage/blob/master/textures/techage_display.png) by Joachim Stolberg, published under the CC BY-SA 3.0 license.
+Modifications were made by Thomas-S.
+
+`ta4_addons_touchscreen_inventory.png`:
+Based on [techage_display_inventory.png](https://github.com/joe7575/techage/blob/master/textures/techage_display_inventory.png) by Joachim Stolberg, published  under the CC BY-SA 3.0 license.
+Modifications were made by Thomas-S.
+
+Everything else:
+CC BY-SA 3.0 by Thomas-S
+

ta4_addons/init.lua

@@ -0,0 +1,30 @@
+--[[
+
+	TA4 Addons
+	==========
+
+	Copyright (C) 2020 Joachim Stolberg
+	Copyright (C) 2020 Thomas S.
+
+	GPL v3
+	See LICENSE.txt for more information
+
+]]--
+
+ta4_addons = {}
+
+-- Version for compatibility checks
+ta4_addons.version = 0.1
+
+-- Load support for I18n.
+ta4_addons.S = minetest.get_translator("ta4_addons")
+
+local MP = minetest.get_modpath("ta4_addons")
+
+dofile(MP.."/touchscreen/main.lua") -- Touchscreen
+
+dofile(MP.."/manual_DE.lua") -- Techage Manual DE
+dofile(MP.."/manual_EN.lua") -- Techage Manual EN
+
+
+techage.add_manual_items({ta4_addons_touchscreen = "ta4_addons_touchscreen_inventory.png"})

ta4_addons/manual_DE.lua

@@ -0,0 +1,67 @@
+techage.add_to_manual('DE', {
+  "1,TA4 Addons",
+  "2,Touchscreen",
+  "3,Unterstützte Elemente und ihre Eigenschaften",
+}, {
+  "Aktuell sind folgende Erweiterungen für TA4 verfügbar:\n"..
+  "\n"..
+  "  - Touchscreen\n"..
+  "\n",
+  "\n"..
+  "\n"..
+  "Der Touchscreen kann wie ein normales TA 4 Display verwendet werden.\n"..
+  "Zusätzlich werden folgende Befehle unterstützt\\, die es erlauben\\, ein Formular zu erstellen\\, das mittels Rechtsklick geöffnet werden kann:\n"..
+  "\n"..
+  "  - add_content: Versucht\\, dem Touchscreen-Formular ein Element hinzuzufügen. Akzeptiert eine Element-Definition als Payload. Gibt im Erfolgsfall die ID des neu erstellten Elements zurück.\n"..
+  "  - update_content: Versucht\\, ein bereits bestehendes Element zu modifizieren. Akzeptiert eine Element-Definition mit einem zusätzlichem ID-Feld als Payload. Dieses ID-Feld wird verwendet\\, um das zu aktualisierende Element zu wählen. Gibt im Erfolgsfall true zurück.\n"..
+  "  - remove_content: Versucht\\, ein existierendes Element vom Touchscreen-Formular zu entfernen. Akzeptiert eine Store-Datenstruktur mit einem Feld \"id\" als Payload. Gibt im Erfolgsfall \"true\" zurück.\n"..
+  "  - private: Macht den Touchscreen privat. Nur Spieler mit Störschutz-Zugang können das Formular absenden.\n"..
+  "  - public: Macht den Touchscreen öffentlich. Alle Spieler können das Formular absenden.\n"..
+  "\n"..
+  "Eine Element-Definition ist eine \"Store\"-Datenstruktur. Der Element-Typ kann im \"type\"-Feld dieser Datenstruktur gesetzt werden.\n"..
+  "Die Eigenschaften des entsprechenden Elements können als weitere Felder in der Store-Datenstruktur gesetzt werden.\n"..
+  "Mehr oder weniger sinnvolle Standardwerte sind grundsätzlich für alle Eigenschaften gesetzt\\,\n"..
+  "es wird aber dringend empfohlen\\, immer selbst die gewünschten Werte explizit zu übergeben\\, da die Standardwerte undokumentiert sind und sich ändern können.\n"..
+  "\n"..
+  "Wenn das Formular abgesendet wird\\, wird eine Store-Struktur an den Controller als Nachricht zurückgesandt.\n"..
+  "Diese Datenstruktur beinhaltet alle Felder\\, die im on_receive_fields callback von Minetest verfügbar sind.\n"..
+  "Zusätzlich ist im Feld \"_sent_by\" der Name des Absenders hinterlegt.\n"..
+  "Mittels der Lua-Controller-Funktion $get_msg(true) kann auf diese Store-Struktur zugegriffen werden.\n"..
+  "Der Wert \"true\" für den ersten Parameter darf dabei nicht vergessen werden\\; ansonsten wird nur die String-Repräsentation der Nachricht zurückgegeben.\n"..
+  "\n"..
+  "Das Formular wird mit der Formspec Version 3 angezeigt (real coordinates aktiviert). Es wird also dringend empfohlen\\, eine aktuelle Minetest Client-Version zu verwenden.\n"..
+  "\n"..
+  "Wenn der Touchscreen geöffnet wird\\, wird eine Nachricht an den Controller gesendet.\n"..
+  "Diese Nachricht enthält einen Store\\, in dem das Feld \"_touchscreen_opened_by\" auf den jeweiligen Spielername gesetzt ist.\n"..
+  "\n",
+  "\n"..
+  "\n"..
+  "Bitte beachte: Diese Liste ist Gegenstand fortwährender Veränderung.\n"..
+  "\n"..
+  "button: x\\, y\\, w\\, h\\, name\\, label\n"..
+  "label: x\\, y\\, label\n"..
+  "image: x\\, y\\, w\\, h\\, texture_name\n"..
+  "animated_image: x\\, y\\, w\\, h\\, name\\, texture_name\\, frame_count\\, frame_duration\\, frame_start\n"..
+  "item_image: x\\, y\\, w\\, h\\, item_name\n"..
+  "pwdfield: x\\, y\\, w\\, h\\, name\\, label\n"..
+  "field: x\\, y\\, w\\, h\\, name\\, label\\, default\n"..
+  "field_close_on_enter: name\\, close_on_enter\n"..
+  "textarea: x\\, y\\, w\\, h\\, name\\, label\\, default\n"..
+  "image_button: x\\, y\\, w\\, h\\, texture_name\\, name\\, label\n"..
+  "item_image_button: x\\, y\\, w\\, h\\, item_name\\, name\\, label\n"..
+  "button_exit: x\\, y\\, w\\, h\\, name\\, label\n"..
+  "image_button_exit: x\\, y\\, w\\, h\\, texture_name\\, name\\, label\n"..
+  "box: x\\, y\\, w\\, h\\, color\n"..
+  "checkbox: x\\, y\\, name\\, label\\, selected\n"..
+  "\n"..
+  "Für weitere Informationen über die Bedeutung dieser Elemente sei die Datei lua_api.txt des Minetest-Projekts empfohlen.\n"..
+  "\n",
+}, {
+  "",
+  "ta4_addons_touchscreen",
+  "ta4_addons_touchscreen",
+}, {
+  "",
+  "",
+  "",
+})

ta4_addons/manual_DE.md

@@ -0,0 +1,57 @@
+# TA4 Addons
+
+Aktuell sind folgende Erweiterungen für TA4 verfügbar:
+ - Touchscreen
+
+## Touchscreen
+
+[ta4_addons_touchscreen|image]
+
+Der Touchscreen kann wie ein normales TA 4 Display verwendet werden.
+Zusätzlich werden folgende Befehle unterstützt, die es erlauben, ein Formular zu erstellen, das mittels Rechtsklick geöffnet werden kann:
+
+- add_content: Versucht, dem Touchscreen-Formular ein Element hinzuzufügen. Akzeptiert eine Element-Definition als Payload. Gibt im Erfolgsfall die ID des neu erstellten Elements zurück.
+- update_content: Versucht, ein bereits bestehendes Element zu modifizieren. Akzeptiert eine Element-Definition mit einem zusätzlichem ID-Feld als Payload. Dieses ID-Feld wird verwendet, um das zu aktualisierende Element zu wählen. Gibt im Erfolgsfall true zurück.
+- remove_content: Versucht, ein existierendes Element vom Touchscreen-Formular zu entfernen. Akzeptiert eine Store-Datenstruktur mit einem Feld "id" als Payload. Gibt im Erfolgsfall "true" zurück.
+- private: Macht den Touchscreen privat. Nur Spieler mit Störschutz-Zugang können das Formular absenden.
+- public: Macht den Touchscreen öffentlich. Alle Spieler können das Formular absenden.
+
+Eine Element-Definition ist eine "Store"-Datenstruktur. Der Element-Typ kann im "type"-Feld dieser Datenstruktur gesetzt werden.
+Die Eigenschaften des entsprechenden Elements können als weitere Felder in der Store-Datenstruktur gesetzt werden.
+Mehr oder weniger sinnvolle Standardwerte sind grundsätzlich für alle Eigenschaften gesetzt,
+es wird aber dringend empfohlen, immer selbst die gewünschten Werte explizit zu übergeben, da die Standardwerte undokumentiert sind und sich ändern können.
+
+Wenn das Formular abgesendet wird, wird eine Store-Struktur an den Controller als Nachricht zurückgesandt.
+Diese Datenstruktur beinhaltet alle Felder, die im on_receive_fields callback von Minetest verfügbar sind.
+Zusätzlich ist im Feld "_sent_by" der Name des Absenders hinterlegt.
+Mittels der Lua-Controller-Funktion $get_msg(true) kann auf diese Store-Struktur zugegriffen werden.
+Der Wert "true" für den ersten Parameter darf dabei nicht vergessen werden; ansonsten wird nur die String-Repräsentation der Nachricht zurückgegeben.
+
+Das Formular wird mit der Formspec Version 3 angezeigt (real coordinates aktiviert). Es wird also dringend empfohlen, eine aktuelle Minetest Client-Version zu verwenden.
+
+Wenn der Touchscreen geöffnet wird, wird eine Nachricht an den Controller gesendet.
+Diese Nachricht enthält einen Store, in dem das Feld "_touchscreen_opened_by" auf den jeweiligen Spielername gesetzt ist.
+
+### Unterstützte Elemente und ihre Eigenschaften
+
+[ta4_addons_touchscreen|image]
+
+Bitte beachte: Diese Liste ist Gegenstand fortwährender Veränderung.
+
+button: x, y, w, h, name, label
+label: x, y, label
+image: x, y, w, h, texture_name
+animated_image: x, y, w, h, name, texture_name, frame_count, frame_duration, frame_start
+item_image: x, y, w, h, item_name
+pwdfield: x, y, w, h, name, label
+field: x, y, w, h, name, label, default
+field_close_on_enter: name, close_on_enter
+textarea: x, y, w, h, name, label, default
+image_button: x, y, w, h, texture_name, name, label
+item_image_button: x, y, w, h, item_name, name, label
+button_exit: x, y, w, h, name, label
+image_button_exit: x, y, w, h, texture_name, name, label
+box: x, y, w, h, color
+checkbox: x, y, name, label, selected
+
+Für weitere Informationen über die Bedeutung dieser Elemente sei die Datei lua_api.txt des Minetest-Projekts empfohlen.

ta4_addons/manual_EN.lua

@@ -0,0 +1,67 @@
+techage.add_to_manual('EN', {
+  "1,TA4 Addons",
+  "2,Touchscreen",
+  "3,Supported Elements and their properties",
+}, {
+  "Currently\\, the following extensions for TA4 are available:\n"..
+  "\n"..
+  "  - Touchscreen\n"..
+  "\n",
+  "\n"..
+  "\n"..
+  "The touchscreen can be used like the normal TA 4 display.\n"..
+  "Additionally\\, it supports the following commands\\, which allow to create a form that can be opened by right-clicking the touchscreen:\n"..
+  "\n"..
+  "  - add_content: Tries to add an element to the touchscreen formspec. Takes an element definition as payload. Returns the ID of the newly created element on success.\n"..
+  "  - update_content: Tries to modify an already existing touchscreen formspec element. Takes an element definition with an additional id field\\, which can be used to choose the element to be updated. Returns true on success.\n"..
+  "  - remove_content: Tries to remove an existing element from the touchscreen formspec. Takes a Store as payload. The only field on this Store should be the id field. Returns true on success.\n"..
+  "  - private: Makes the touchscreen private. Only players with protection access can submit the form.\n"..
+  "  - public: Makes the touchscreen public. All players can submit the form.\n"..
+  "\n"..
+  "An element definition is a Store data structure. You can set the element type in the \"type\" field of this Store.\n"..
+  "You can set properties for the element as further fields in this Store.\n"..
+  "More or less reasonable default values are always provided for these additional properties\\,\n"..
+  "but it is strongly suggested to always provide the values by yourself as the defaults are undocumented and subject to change.\n"..
+  "\n"..
+  "On formspec submit\\, a Store is sent back to the controller as message.\n"..
+  "The fields as available in the Minetest on_receive_fields callbacks are set in this store.\n"..
+  "The field \"_sent_by\" contains the sender's name.\n"..
+  "You can access this store by using the $get_msg(true) function of the Lua Controller.\n"..
+  "Please do not forget the \"true\" value as first parameter\\; otherwise you'll only get access to the string representation of the message.\n"..
+  "\n"..
+  "The form is rendered by using formspec version 3 (real coordinates enabled)\\, so please use a recent Minetest client version.\n"..
+  "\n"..
+  "When someone opens the touchscreen\\, a message will be sent to the controller.\n"..
+  "This message contains a Store\\, in which the field \"_touchscreen_opened_by\" is set to the respective player name.\n"..
+  "\n",
+  "\n"..
+  "\n"..
+  "Please note: This list is subject to change.\n"..
+  "\n"..
+  "button: x\\, y\\, w\\, h\\, name\\, label\n"..
+  "label: x\\, y\\, label\n"..
+  "image: x\\, y\\, w\\, h\\, texture_name\n"..
+  "animated_image: x\\, y\\, w\\, h\\, name\\, texture_name\\, frame_count\\, frame_duration\\, frame_start\n"..
+  "item_image: x\\, y\\, w\\, h\\, item_name\n"..
+  "pwdfield: x\\, y\\, w\\, h\\, name\\, label\n"..
+  "field: x\\, y\\, w\\, h\\, name\\, label\\, default\n"..
+  "field_close_on_enter: name\\, close_on_enter\n"..
+  "textarea: x\\, y\\, w\\, h\\, name\\, label\\, default\n"..
+  "image_button: x\\, y\\, w\\, h\\, texture_name\\, name\\, label\n"..
+  "item_image_button: x\\, y\\, w\\, h\\, item_name\\, name\\, label\n"..
+  "button_exit: x\\, y\\, w\\, h\\, name\\, label\n"..
+  "image_button_exit: x\\, y\\, w\\, h\\, texture_name\\, name\\, label\n"..
+  "box: x\\, y\\, w\\, h\\, color\n"..
+  "checkbox: x\\, y\\, name\\, label\\, selected\n"..
+  "\n"..
+  "For further information of the meaning of these elements\\, please consult Minetest's lua_api.txt.\n"..
+  "\n",
+}, {
+  "",
+  "ta4_addons_touchscreen",
+  "ta4_addons_touchscreen",
+}, {
+  "",
+  "",
+  "",
+})

ta4_addons/manual_EN.md

@@ -0,0 +1,57 @@
+# TA4 Addons
+
+Currently, the following extensions for TA4 are available:
+ - Touchscreen
+
+## Touchscreen
+
+[ta4_addons_touchscreen|image]
+
+The touchscreen can be used like the normal TA 4 display.
+Additionally, it supports the following commands, which allow to create a form that can be opened by right-clicking the touchscreen:
+
+- add_content: Tries to add an element to the touchscreen formspec. Takes an element definition as payload. Returns the ID of the newly created element on success.
+- update_content: Tries to modify an already existing touchscreen formspec element. Takes an element definition with an additional id field, which can be used to choose the element to be updated. Returns true on success.
+- remove_content: Tries to remove an existing element from the touchscreen formspec. Takes a Store as payload. The only field on this Store should be the id field. Returns true on success.
+- private: Makes the touchscreen private. Only players with protection access can submit the form.
+- public: Makes the touchscreen public. All players can submit the form.
+
+An element definition is a Store data structure. You can set the element type in the "type" field of this Store.
+You can set properties for the element as further fields in this Store.
+More or less reasonable default values are always provided for these additional properties,
+but it is strongly suggested to always provide the values by yourself as the defaults are undocumented and subject to change.
+
+On formspec submit, a Store is sent back to the controller as message.
+The fields as available in the Minetest on_receive_fields callbacks are set in this store.
+The field "_sent_by" contains the sender's name.
+You can access this store by using the $get_msg(true) function of the Lua Controller.
+Please do not forget the "true" value as first parameter; otherwise you'll only get access to the string representation of the message.
+
+The form is rendered by using formspec version 3 (real coordinates enabled), so please use a recent Minetest client version.
+
+When someone opens the touchscreen, a message will be sent to the controller.
+This message contains a Store, in which the field "_touchscreen_opened_by" is set to the respective player name.
+
+### Supported Elements and their properties
+
+[ta4_addons_touchscreen|image]
+
+Please note: This list is subject to change.
+
+button: x, y, w, h, name, label
+label: x, y, label
+image: x, y, w, h, texture_name
+animated_image: x, y, w, h, name, texture_name, frame_count, frame_duration, frame_start
+item_image: x, y, w, h, item_name
+pwdfield: x, y, w, h, name, label
+field: x, y, w, h, name, label, default
+field_close_on_enter: name, close_on_enter
+textarea: x, y, w, h, name, label, default
+image_button: x, y, w, h, texture_name, name, label
+item_image_button: x, y, w, h, item_name, name, label
+button_exit: x, y, w, h, name, label
+image_button_exit: x, y, w, h, texture_name, name, label
+box: x, y, w, h, color
+checkbox: x, y, name, label, selected
+
+For further information of the meaning of these elements, please consult Minetest's lua_api.txt.

ta4_addons/markdown2lua.py

@@ -0,0 +1,203 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+
+# Copyright (C) 2020 Joachim Stolberg
+# Licensed under the GNU GPL version 3 or later. See LICENSE_GPL.txt.
+# Apart from adding this copyright information comment, no further changes were made to this file.
+
+import re
+import mistune # install v0.8.4 with: pip install mistune
+
+__version__ = "1.0"
+
+class WikiLinkInlineLexer(mistune.InlineLexer):
+    def enable_wiki_link(self):
+        # add wiki_link rules
+        self.rules.wiki_link = re.compile(
+            r'\['                     # [
+            r'([\s\S]+?\|[\s\S]+?)'   # name| img-type
+            r'\](?!\])'               # ]
+        )
+
+        # Add wiki_link parser to default rules
+        # you can insert it some place you like
+        # but place matters, maybe 3 is not good
+        self.default_rules.insert(3, 'wiki_link')
+
+    def output_wiki_link(self, m):
+        text = m.group(1)
+        name, itype = text.split('|')
+        # you can create an custom render
+        # you can also return the html if you like
+        return self.renderer.wiki_link(name, itype)
+
+class MarkdownToLua(mistune.Renderer):
+    def __init__(self, *args, **kwargs):
+        mistune.Renderer.__init__(self, *args, **kwargs)
+        self.item_name = ""
+        self.plan_table = ""
+        self.is_first_header = True
+        self.text_chunck = []
+        self.lTitle = []
+        self.lText = []
+        self.lItemName = []
+        self.lPlanTable = []
+        print("Markdown-to-Lua v%s" % __version__)
+
+    def m2l_formspec_escape(self, text):
+        text = text.replace("\\", "")
+        text = text.replace("[", "\\\\[")
+        text = text.replace("]", "\\\\]")
+        text = text.replace(";", "\\\\;")
+        text = text.replace(",", "\\\\,")
+        text = text.replace('"', '\\"')
+        text = text.replace('\n', '\\n')
+        return text
+
+    def m2l_add_last_paragraph(self):
+        """
+        Used to add a text block before the next header or at the end of the document
+        """
+        self.lText.append(self.text_chunck)
+        self.text_chunck = []
+        self.lItemName.append(self.item_name)
+        self.item_name = ""
+        self.lPlanTable.append(self.plan_table)
+        self.plan_table = ""
+    ##
+    ## Block Level
+    ##
+    def block_code(self, code, lang):
+        text = self.m2l_formspec_escape(code.strip())
+        lines = text.split("\n")
+        lines = ["    " + item for item in lines]
+        self.text_chunck.extend(lines)
+        self.text_chunck.append("")
+        return ""
+
+    def header(self, text, level, raw=None):
+        if not self.is_first_header:
+            self.m2l_add_last_paragraph()
+        self.is_first_header = False
+        self.lTitle.append("%u,%s" % (level, self.m2l_formspec_escape(text)))
+        return ""
+
+    def hrule(self):
+        self.text_chunck.append("\n----------------------------------------------------\n")
+        return ""
+
+    def paragraph(self, text):
+        lines = text.split("\\n") + [""]
+        self.text_chunck.extend(lines)
+        return ""
+
+    def list(self, body, ordered=True):
+        lines = body.split("\n")
+        self.text_chunck.extend(lines)
+        return ""
+
+    def list_item(self, text):
+        return "  - %s\n" % text.strip()
+    ##
+    ## Span Level
+    ##
+    def emphasis(self, text):
+        return "*%s*" % self.m2l_formspec_escape(text)
+
+    def double_emphasis(self, text):
+        return "*%s*" % self.m2l_formspec_escape(text)
+
+    def codespan(self, text):
+        return "'%s'" % self.m2l_formspec_escape(text)
+
+    def text(self, text):
+        return self.m2l_formspec_escape(text)
+
+    def link(self, link, title, content):
+        """
+        Used for plans and images:
+        [myimage](/image/)
+        [myplan](/plan/)
+        """
+        if link == "/image/":
+            self.item_name = content
+        elif link == "/plan/":
+            self.plan_table = content
+        return ""
+
+    def wiki_link(self, name, itype):
+        """
+        Used for plans and images:
+        [myimage|image]
+        [myplan|plan]
+        """
+        if itype == "image":
+            self.item_name = name
+        elif itype == "plan":
+            self.plan_table = name
+        return ""
+
+    def autolink(self, link, is_email=False):
+        return link
+
+    def linebreak(self):
+        return "\\n"
+
+    def newline(self):
+        return "\\n"
+
+    def inline_html(self, text):
+        #print(text)
+        pass
+
+    def parse_md_file(self, src_name):
+        print(" - Read MD file '%s'" % src_name)
+        inline = WikiLinkInlineLexer(self)
+        # enable the feature
+        inline.enable_wiki_link()
+        md = mistune.Markdown(renderer=self, inline=inline)
+        md.renderer.src_name = src_name
+        md.render(open(src_name, 'r').read())
+        md.renderer.m2l_add_last_paragraph()
+
+    def lua_table(self, lData):
+        lOut = []
+        lOut.append("{")
+        for line in lData:
+            lOut.append('  "%s",' % line)
+        lOut.append("}")
+        return "\n".join(lOut)
+
+    def lua_text_table(self, lData):
+        lOut = []
+        lOut.append("{")
+        for lines in lData:
+            for line in lines[:-1]:
+                line = line.replace('<br>', '\\n')
+                lOut.append('  "%s\\n"..' % line)
+            if len(lines) > 0:
+                lOut.append('  "%s\\n",' % lines[-1])
+            else:
+                lOut.append('  "",')
+        lOut.append("}")
+        return "\n".join(lOut)
+
+    def gen_lua_file(self, dest_name, language="EN"):
+        print(" - Write Lua file '%s'" % dest_name)
+        lOut = []
+        s = ", ".join([self.lua_table(self.lTitle),
+                       self.lua_text_table(self.lText),
+                       self.lua_table(self.lItemName),
+                       self.lua_table(self.lPlanTable)])
+        open(dest_name, "w").write("techage.add_to_manual('%s', %s)\n" % (language, s))
+        print("done.")
+
+
+m2l = MarkdownToLua()
+m2l.parse_md_file("./manual_EN.md")
+m2l.gen_lua_file("./manual_EN.lua", "EN")
+
+m2l = MarkdownToLua()
+m2l.parse_md_file("./manual_DE.md")
+m2l.gen_lua_file("./manual_DE.lua", "DE")
+

ta4_addons/mod.conf

@@ -0,0 +1,3 @@
+name = ta4_addons
+depends = default,techage,lcdlib,safer_lua
+description = Addons for the TA4 age of Techage mod.

ta4_addons/touchscreen/main.lua

@@ -0,0 +1,346 @@
+--[[
+
+	TA4 Addons
+	==========
+
+	Copyright (C) 2020 Joachim Stolberg
+	Copyright (C) 2020 Thomas S.
+
+	AGPL v3
+	See LICENSE.txt for more information
+
+	Touchscreen
+
+]]--
+
+local S = ta4_addons.S
+local M = minetest.get_meta
+local N = techage.get_nvm
+
+local function get_value(element, key, default)
+	return minetest.formspec_escape(element.get(key) or default)
+end
+
+local function parse_payload(payload)
+	local element_type = payload.get("type")
+	if type(element_type) ~= "string" then
+		return
+	end
+	element_type = string.lower(element_type)
+	if element_type == "button" then
+		local x = get_value(payload, "x", 1)
+		local y = get_value(payload, "y", 1)
+		local w = get_value(payload, "w", 2)
+		local h = get_value(payload, "h", 1)
+		local name = get_value(payload, "name", "button")
+		local label = get_value(payload, "label", "Button")
+		return "button["..x..","..y..";"..w..","..h..";"..name..";"..label.."]"
+	elseif element_type == "label" then
+		local x = get_value(payload, "x", 1)
+		local y = get_value(payload, "y", 1)
+		local label = get_value(payload, "label", "Label")
+		return "label["..x..","..y..";"..label.."]"
+	elseif element_type == "image" then
+		local x = get_value(payload, "x", 1)
+		local y = get_value(payload, "y", 1)
+		local w = get_value(payload, "w", 1)
+		local h = get_value(payload, "h", 1)
+		local texture_name = get_value(payload, "texture_name", "default_apple.png")
+		return "image["..x..","..y..";"..w..","..h..";"..texture_name.."]"
+	elseif element_type == "animated_image" then
+		local x = get_value(payload, "x", 1)
+		local y = get_value(payload, "y", 1)
+		local w = get_value(payload, "w", 1)
+		local h = get_value(payload, "h", 1)
+		local name = get_value(payload, "name", "animated_image")
+		local texture_name = get_value(payload, "texture_name", "default_apple.png")
+		local frame_count = get_value(payload, "frame_count", 1)
+		local frame_duration = get_value(payload, "frame_duration", 1000)
+		local frame_start = get_value(payload, "frame_start", 1)
+		return "animated_image["..x..","..y..";"..w..","..h..";"..name..";"..texture_name..";"..frame_count..";"..frame_duration..";"..frame_start.."]"
+	elseif element_type == "item_image" then
+		local x = get_value(payload, "x", 1)
+		local y = get_value(payload, "y", 1)
+		local w = get_value(payload, "w", 1)
+		local h = get_value(payload, "h", 1)
+		local item_name = get_value(payload, "item_name", "default:apple")
+		return "item_image["..x..","..y..";"..w..","..h..";"..item_name.."]"
+	elseif element_type == "pwdfield" then
+		local x = get_value(payload, "x", 1)
+		local y = get_value(payload, "y", 1)
+		local w = get_value(payload, "w", 2)
+		local h = get_value(payload, "h", 1)
+		local name = get_value(payload, "name", "pwdfield")
+		local label = get_value(payload, "label", "Password")
+		return "pwdfield["..x..","..y..";"..w..","..h..";"..name..";"..label.."]"
+	elseif element_type == "field" then
+		local x = get_value(payload, "x", 1)
+		local y = get_value(payload, "y", 1)
+		local w = get_value(payload, "w", 2)
+		local h = get_value(payload, "h", 1)
+		local name = get_value(payload, "name", "field")
+		local label = get_value(payload, "label", "Input")
+		local default = get_value(payload, "default", ""):gsub("%${", "$ {") -- To prevent reading metadata
+		return "field["..x..","..y..";"..w..","..h..";"..name..";"..label..";"..default.."]"
+	elseif element_type == "field_close_on_enter" then
+		local name = get_value(payload, "name", "field")
+		local close_on_enter = get_value(payload, "close_on_enter", "false")
+		return "field_close_on_enter["..name..";"..close_on_enter"]"
+	elseif element_type == "textarea" then
+		local x = get_value(payload, "x", 1)
+		local y = get_value(payload, "y", 1)
+		local w = get_value(payload, "w", 2)
+		local h = get_value(payload, "h", 1)
+		local name = get_value(payload, "name", "")
+		local label = get_value(payload, "label", "Textarea")
+		local default = get_value(payload, "default", ""):gsub("%${", "$ {") -- To prevent reading metadata
+		return "textarea["..x..","..y..";"..w..","..h..";"..name..";"..label..";"..default.."]"
+	elseif element_type == "image_button" then
+		local x = get_value(payload, "x", 1)
+		local y = get_value(payload, "y", 1)
+		local w = get_value(payload, "w", 1)
+		local h = get_value(payload, "h", 1)
+		local texture_name = get_value(payload, "texture_name", "default_apple.png")
+		local name = get_value(payload, "name", "image_button")
+		local label = get_value(payload, "label", "")
+		return "image_button["..x..","..y..";"..w..","..h..";"..texture_name..";"..name..";"..label.."]"
+	elseif element_type == "item_image_button" then
+		local x = get_value(payload, "x", 1)
+		local y = get_value(payload, "y", 1)
+		local w = get_value(payload, "w", 1)
+		local h = get_value(payload, "h", 1)
+		local item_name = get_value(payload, "item_name", "default:apple")
+		local name = get_value(payload, "name", "item_image_button")
+		local label = get_value(payload, "label", "")
+		return "item_image_button["..x..","..y..";"..w..","..h..";"..item_name..";"..name..";"..label.."]"
+	elseif element_type == "button_exit" then
+		local x = get_value(payload, "x", 1)
+		local y = get_value(payload, "y", 1)
+		local w = get_value(payload, "w", 2)
+		local h = get_value(payload, "h", 1)
+		local name = get_value(payload, "name", "button_exit")
+		local label = get_value(payload, "label", "Exit Button")
+		return "button_exit["..x..","..y..";"..w..","..h..";"..name..";"..label.."]"
+	elseif element_type == "image_button_exit" then
+		local x = get_value(payload, "x", 1)
+		local y = get_value(payload, "y", 1)
+		local w = get_value(payload, "w", 1)
+		local h = get_value(payload, "h", 1)
+		local texture_name = get_value(payload, "texture_name", "creative_clear_icon.png")
+		local name = get_value(payload, "name", "image_button")
+		local label = get_value(payload, "label", "")
+		return "image_button_exit["..x..","..y..";"..w..","..h..";"..texture_name..";"..name..";"..label.."]"
+	elseif element_type == "box" then
+		local x = get_value(payload, "x", 1)
+		local y = get_value(payload, "y", 1)
+		local w = get_value(payload, "w", 2)
+		local h = get_value(payload, "h", 1)
+		local color = get_value(payload, "color", "")
+		return "box["..x..","..y..";"..w..","..h..";"..color.."]"
+	elseif element_type == "checkbox" then
+		local x = get_value(payload, "x", 1)
+		local y = get_value(payload, "y", 1)
+		local name = get_value(payload, "name", "checkbox")
+		local label = get_value(payload, "label", "")
+		local selected = get_value(payload, "selected", "false")
+		return "checkbox["..x..","..y..";"..name..";"..label..";"..selected.."]"
+	end
+end
+
+local function next_id(pos)
+	local nvm = N(pos)
+	local id = (nvm.element_id or 0) + 1
+	nvm.element_id = id
+	return id
+end
+
+local function reset_id(pos)
+	N(pos).element_id = 0
+end
+
+local function get_elements(pos)
+	local nvm = N(pos)
+	nvm.elements = nvm.elements or {}
+	return nvm.elements
+end
+
+local function valid_payload(payload)
+	if not payload then return false end
+	if not type(payload) == "table" then return false end
+	if not payload.get then return false end
+	if not payload.next then return false end
+	return true
+end
+
+local function update_fs(pos)
+	local meta = M(pos)
+	local fs = "formspec_version[3]"
+	fs = fs .. "size[10,10]"
+	local elements = get_elements(pos)
+	for _,ele in ipairs(elements) do
+		fs = fs .. ele
+	end
+	meta:set_string("formspec", fs)
+end
+
+local function add_content(pos, payload)
+	if not valid_payload(payload) then
+		return
+	end
+	local element = parse_payload(payload)
+	if not element then
+		return
+	end
+	local elements = get_elements(pos)
+	local id = next_id(pos)
+	elements[id] = element
+	update_fs(pos)
+	return id
+end
+
+local function update_content(pos, payload)
+	if not valid_payload(payload) then
+		return false
+	end
+	local id = payload.get("id")
+	local elements = get_elements(pos)
+	if not id or not elements[id] then
+		return false
+	end
+	local element = parse_payload(payload)
+	if not element then
+		return false
+	end
+	elements[id] = element
+	update_fs(pos)
+	return true
+end
+
+local function remove_content(pos, payload)
+	if valid_payload(payload) then
+		local id = payload.get("id")
+		if id then
+			local elements = get_elements(pos)
+			if not elements[id] then
+				return false
+			end
+			elements[id] = nil
+			update_fs(pos)
+			return true
+		else
+			return false
+		end
+	end
+	local nvm = techage.get_nvm(pos)
+	nvm.elements = {}
+	nvm.element_id = nil
+	update_fs(pos)
+	return true
+end
+
+minetest.register_node("ta4_addons:touchscreen", {
+	description = S("TA4 Display"),
+	inventory_image = "ta4_addons_touchscreen_inventory.png",
+	tiles = {"ta4_addons_touchscreen.png"},
+	drawtype = "nodebox",
+	paramtype = "light",
+	sunlight_propagates = true,
+	paramtype2 = "wallmounted",
+	node_box = techage.display.lcd_box,
+	selection_box = techage.display.lcd_box,
+	light_source = 6,
+
+	display_entities = {
+		["techage:display_entity"] = {
+			depth = 0.42,
+			on_display_update = techage.display.display_update
+		},
+	},
+
+	after_place_node = function(pos, placer)
+		local number = techage.add_node(pos, "ta4_addons:touchscreen")
+		local meta = M(pos)
+		meta:set_string("node_number", number)
+		meta:set_string("infotext", S("Touchscreen no: ")..number)
+		update_fs(pos)
+		local nvm = techage.get_nvm(pos)
+		nvm.text = {"My", "Techage","TA4", "Touchscreen", "No: "..number}
+		lcdlib.update_entities(pos)
+		minetest.get_node_timer(pos):start(1)
+	end,
+
+	after_dig_node = function(pos, oldnode, oldmetadata)
+		remove_content(pos)
+		techage.remove_node(pos, oldnode, oldmetadata)
+	end,
+	
+	on_rightclick = function(pos, node, clicker)
+		local meta = M(pos)
+		local ctrl = meta:get_string("ctrl")
+		if ctrl then
+			local own_num = meta:get_string("node_number") or ""
+			techage.send_single(own_num, ctrl, "msg", safer_lua.Store("_touchscreen_opened_by", clicker:get_player_name()))
+		end
+	end,
+
+	on_receive_fields = function(pos, formname, fields, sender)
+		local meta = M(pos)
+		local player_name = sender:get_player_name()
+		if meta:get_string("public") ~= "true" and minetest.is_protected(pos, player_name) then
+			return
+		end
+		local fields_store = safer_lua.Store()
+		for k,v in pairs(fields) do
+			fields_store.set(k, v)
+		end
+		fields_store.set("_sent_by", player_name)
+		local ctrl = meta:get_string("ctrl")
+		if ctrl then
+			local own_num = meta:get_string("node_number") or ""
+			techage.send_single(own_num, ctrl, "msg", fields_store)
+		end
+	end,
+
+	on_timer = techage.display.on_timer,
+	on_place = lcdlib.on_place,
+	on_construct = lcdlib.on_construct,
+	on_destruct = lcdlib.on_destruct,
+	on_rotate = lcdlib.on_rotate,
+	groups = {cracky=2, crumbly=2},
+	is_ground_content = false,
+	sounds = default.node_sound_glass_defaults(),
+})
+
+minetest.register_craft({
+	output = "ta4_addons:touchscreen",
+	recipe = {
+		{"", "dye:blue", ""},
+		{"default:copper_ingot", "techage:ta4_display", "default:copper_ingot"},
+		{"", "default:mese_crystal_fragment", ""},
+	},
+})
+
+techage.register_node({"ta4_addons:touchscreen"}, {
+	on_recv_message = function(pos, src, topic, payload)
+		if topic == "add" then  -- add one line and scroll if necessary
+			techage.display.add_line(pos, payload, 1)
+		elseif topic == "set" then  -- overwrite the given row
+			techage.display.write_row(pos, payload, 1)
+		elseif topic == "clear" then  -- clear the screen
+			techage.display.clear_screen(pos, 1)
+		elseif topic == "add_content" then
+			M(pos):set_string("ctrl", src)
+			return add_content(pos, payload)
+		elseif topic == "update_content" then
+			M(pos):set_string("ctrl", src)
+			return update_content(pos, payload)
+		elseif topic == "remove_content" then
+			M(pos):set_string("ctrl", src)
+			return remove_content(pos, payload)
+		elseif topic == "private" then
+			M(pos):set_string("public", "false")
+		elseif topic == "public" then
+			M(pos):set_string("public", "true")
+		end
+	end,
+})

ta4_jetpack/init.lua

@@ -13,6 +13,8 @@
 -- Load support for I18n.
 local S = minetest.get_translator("ta4_jetpack")
 
+local liquid = networks.liquid
+
 local ta4_jetpack = {}
 
 local Players = {}
@@ -321,25 +323,27 @@ local function load_fuel(itemstack, user, pointed_thing)
 	local pos = pointed_thing.under
 	if pos then
 		local name = user:get_player_name()
+		local nvm = techage.get_nvm(pos)
 		-- check jetpack
 		if not Jetpacks[name] then 
 			minetest.chat_send_player(name, S("[Jetpack] You don't have your jetpack on your back!"))
 			return itemstack
 		end
-		if techage.liquid.srv_peek(pos, 5) == "techage:hydrogen" then
+		if name and liquid.srv_peek(nvm) == "techage:hydrogen" then
 			local value = get_fuel_value(name)
 			local newvalue
 			
 			if user:get_player_control().sneak then -- back to tank?
 				local amount = math.min(value, FUEL_UNIT)
-				local rest = techage.liquid.srv_put(pos, 5, "techage:hydrogen", amount)
+				local rest = liquid.srv_put(nvm, "techage:hydrogen", amount, MAX_FUEL)
 				newvalue = value - amount + rest
 			else
 				local amount = math.min(FUEL_UNIT, MAX_FUEL - value)
-				local taken = techage.liquid.srv_take(pos, 5, "techage:hydrogen", amount)
+				local taken = liquid.srv_take(nvm, "techage:hydrogen", amount)
 				newvalue = value + taken
 			end
 			set_fuel_value(name, newvalue)
+			minetest.chat_send_player(name, S("[Jetpack]") .. ": " .. newvalue .. "/" .. MAX_FUEL)
 		end
 	end
 	return itemstack

techage/.test/sink.lua

@@ -3,7 +3,7 @@
 	TechAge
 	=======
 
-	Copyright (C) 2019-2020 Joachim Stolberg
+	Copyright (C) 2019-2021 Joachim Stolberg
 
 	GPL v3
 	See LICENSE.txt for more information
@@ -21,7 +21,8 @@ local PWR_NEEDED = 5
 local CYCLE_TIME = 2
 
 local Cable = techage.ElectricCable
-local power = techage.power
+--local Cable = techage.Axle
+local power = networks.power
 
 local function swap_node(pos, name)
 	local node = techage.get_node_lvm(pos)
@@ -32,39 +33,18 @@ local function swap_node(pos, name)
 	minetest.swap_node(pos, node)
 end
 
-local function on_power(pos)
-	--print("on_power sink "..P2S(pos))
-	swap_node(pos, "techage:sink_on")
-	M(pos):set_string("infotext", "on")
-end
-
-local function on_nopower(pos)
-	--print("on_nopower sink "..P2S(pos))
-	swap_node(pos, "techage:sink")
-	M(pos):set_string("infotext", "off")
-end
-
-local function node_timer(pos, elapsed)
-	--print("node_timer sink "..P2S(pos))
-	local nvm = techage.get_nvm(pos)
-	power.consumer_alive(pos, Cable, CYCLE_TIME)
-	return true
-end
-
 local function on_rightclick(pos, node, clicker)
 	local nvm = techage.get_nvm(pos)
 	if not nvm.running and power.power_available(pos, Cable) then
 		nvm.running = true
-		-- swap will be performed via on_power()
+		swap_node(pos, "techage:sink_on")
-		power.consumer_start(pos, Cable, CYCLE_TIME)
+		M(pos):set_string("infotext", "on")
 		minetest.get_node_timer(pos):start(CYCLE_TIME)
-		M(pos):set_string("infotext", "...")
 	else
 		nvm.running = false
 		swap_node(pos, "techage:sink")
-		power.consumer_stop(pos, Cable)
-		minetest.get_node_timer(pos):stop()
 		M(pos):set_string("infotext", "off")
+		minetest.get_node_timer(pos):stop()
 	end
 end
 
@@ -79,30 +59,21 @@ local function after_dig_node(pos, oldnode)
 	techage.del_mem(pos)
 end
 
-local function tubelib2_on_update2(pos, outdir, tlib2, node) 
-	power.update_network(pos, outdir, tlib2)
-end
-
-local net_def = {
-	ele1 = {
-		sides = techage.networks.AllSides, -- Cable connection sides
-		ntype = "con1",
-		on_power = on_power,
-		on_nopower = on_nopower,
-		nominal = PWR_NEEDED,
-	},
-}
-
 minetest.register_node("techage:sink", {
 	description = "Sink",
-	tiles = {'techage_electric_button.png'},
+	tiles = {'techage_electric_button.png^[colorize:#000000:50'},
 	
-	on_timer = node_timer,
+	on_timer = function(pos, elapsed)
+		local consumed = power.consume_power(pos, Cable, nil, PWR_NEEDED)
+		if consumed == PWR_NEEDED then
+			swap_node(pos, "techage:sink_on")
+			M(pos):set_string("infotext", "on")
+		end
+		return true
+	end,
 	on_rightclick = on_rightclick,
 	after_place_node = after_place_node,
 	after_dig_node = after_dig_node,
-	tubelib2_on_update2 = tubelib2_on_update2,
-	networks = net_def,
 
 	paramtype = "light",
 	light_source = 0,	
@@ -116,12 +87,17 @@ minetest.register_node("techage:sink_on", {
 	description = "Sink",
 	tiles = {'techage_electric_button.png'},
 
-	on_timer = node_timer,
+	on_timer = function(pos, elapsed)
+		local consumed = power.consume_power(pos, Cable, nil, PWR_NEEDED)
+		if consumed < PWR_NEEDED then
+			swap_node(pos, "techage:sink")
+			M(pos):set_string("infotext", "off")
+		end
+		return true
+	end,
 	on_rightclick = on_rightclick,
 	after_place_node = after_place_node,
 	after_dig_node = after_dig_node,
-	tubelib2_on_update2 = tubelib2_on_update2,
-	networks = net_def,
 
 	paramtype = "light",
 	light_source = minetest.LIGHT_MAX,	
@@ -133,5 +109,4 @@ minetest.register_node("techage:sink_on", {
 	sounds = default.node_sound_wood_defaults(),
 })
 
-Cable:add_secondary_node_names({"techage:sink", "techage:sink_on"})
+power.register_nodes({"techage:sink", "techage:sink_on"}, Cable, "con")
-

techage/README.md

@@ -31,11 +31,11 @@ Copyright (C) 2019-2021 Joachim Stolberg
 Code: Licensed under the GNU AGPL version 3 or later. See LICENSE.txt  
 Textures: CC BY-SA 3.0
 
-Many thanks to Thomas-S for his contributions
+Many thanks to Thomas-S and others for their contributions
 
 
 ### Dependencies  
-Required: default, doors, bucket, stairs, screwdriver, basic_materials, tubelib2, minecart, lcdlib, safer_lua  
+Required: default, doors, bucket, stairs, screwdriver, basic_materials, tubelib2, networks, minecart, lcdlib, safer_lua  
 Recommended: signs_bot, hyperloop, compost, techpack_stairway, autobahn  
 Optional: unified_inventory, wielded_light, unifieddyes, lua-mashal, lsqlite3, moreores, ethereal, mesecon
 
@@ -46,6 +46,7 @@ The mods `default`, `doors`, `bucket`, `stairs`, and `screwdriver` are part of M
 
 The following mods in the newest version have to be downloaded directly from GitHub:
 * [tubelib2](https://github.com/joe7575/tubelib2)
+* [networks](https://github.com/joe7575/networks)
 * [minecart](https://github.com/joe7575/minecart)
 * [lcdlib](https://github.com/joe7575/lcdlib)
 * [safer_lua](https://github.com/joe7575/safer_lua)
@@ -77,7 +78,16 @@ Available worlds will be converted to 'lsqlite3', but there is no way back, so:
 
 ### History
 
-**2021-05-14  V0.25**
+**2021-07-23  V1.00**
+- Change the way, power distribution works
+- Add TA2 storage system
+- Add TA4 Isolation Transformer 
+- Add TA4 Electric Meter
+- Add new power terminal
+- Many improvements on power producing/consuming nodes
+- See Construction Board for some hints on moving to v1
+
+**2021-05-14  V0.26**
 - Add concentrator tubes
 - Add ta4 cable wall entry
 - Pull request #57: Distributor improvements (from Thomas-S)

techage/basic_machines/autocrafter.lua

@@ -430,3 +430,9 @@ minetest.register_craft({
 	},
 })
 
+local Cable = techage.ElectricCable
+local power = networks.power
+
+techage.register_node_for_v1_transition({"techage:ta3_autocrafter_pas"}, function(pos, node)
+	power.update_network(pos, nil, Cable)
+end)

techage/basic_machines/blackhole.lua

@@ -14,7 +14,7 @@
 
 local S = techage.S
 local Pipe = techage.LiquidPipe
-local liquid = techage.liquid
+local liquid = networks.liquid
 
 local function take_liquid(pos, indir, name, amount)
 	return 0, name
@@ -28,13 +28,6 @@ local function peek_liquid(pos, indir)
 	return nil
 end
 
-local networks_def = {
-	pipe2 = {
-		sides = {R=1}, -- Pipe connection sides
-		ntype = "tank",
-	},
-}
-
 minetest.register_node("techage:blackhole", {
 	description = S("TechAge Black Hole"),
 	tiles = {
@@ -57,22 +50,12 @@ minetest.register_node("techage:blackhole", {
 	after_dig_node = function(pos, oldnode)
 		Pipe:after_dig_node(pos)
 	end,
-	tubelib2_on_update2 = function(pos, outdir, tlib2, node)
-		liquid.update_network(pos, outdir)
-	end,
 
 	on_rotate = screwdriver.disallow,
 	paramtype2 = "facedir",
 	groups = {choppy=2, cracky=2, crumbly=2},
 	is_ground_content = false,
 	sounds = default.node_sound_wood_defaults(),
-	liquid = {
-		capa = 999999,
-		peek = peek_liquid,
-		put = put_liquid,
-		take = take_liquid,
-	},
-	networks = networks_def,
 })
 
 minetest.register_craft({
@@ -96,4 +79,11 @@ techage.register_node({"techage:blackhole"}, {
 	end,
 })
 
-Pipe:add_secondary_node_names({"techage:blackhole"})
+liquid.register_nodes({"techage:blackhole"},
+	Pipe, "tank", {"R"}, {
+		capa = 9999999,
+		peek = peek_liquid,
+		put = put_liquid,
+		take = take_liquid,
+	}
+)

techage/basic_machines/chest.lua

@@ -16,6 +16,8 @@
 local M = minetest.get_meta
 local S = techage.S
 
+local TA4_INV_SIZE = 50
+
 local MP = minetest.get_modpath(minetest.get_current_modname())
 local mConf = dofile(MP.."/basis/conf_inv.lua")
 
@@ -345,21 +347,15 @@ techage.register_node({"techage:chest_ta4"}, {
 		local inv = meta:get_inventory()
 		local mem = techage.get_mem(pos)
 		
-		mem.filter = mem.filter or mConf.item_filter(pos, 50)
+		mem.filter = mem.filter or mConf.item_filter(pos, TA4_INV_SIZE)
-		mem.chest_configured = mem.chest_configured or 
+		mem.chest_configured = mem.chest_configured or not inv:is_empty("conf")
-				not mem.filter["unconfigured"] or #mem.filter["unconfigured"] < 50
 		
 		if inv:is_empty("main") then
 			return nil
 		end
 		
 		if item_name then
-			if mem.filter[item_name] then -- configured item
+			if mem.filter[item_name] or not mem.chest_configured then
-				local taken = inv:remove_item("main", {name = item_name, count = num})
-				if taken:get_count() > 0 then
-					return taken
-				end
-			elseif not mem.chest_configured then
 				local taken = inv:remove_item("main", {name = item_name, count = num})
 				if taken:get_count() > 0 then
 					return taken
@@ -367,7 +363,7 @@ techage.register_node({"techage:chest_ta4"}, {
 			end
 		else -- no item given
 			if mem.chest_configured then
-				return mConf.take_item(pos, inv, "main", num, mem.filter["unconfigured"] or {})
+				return mConf.take_item(pos, inv, "main", num, mem.filter["unconfigured"])
 			else
 				return techage.get_items(pos, inv, "main", num)
 			end
@@ -378,9 +374,8 @@ techage.register_node({"techage:chest_ta4"}, {
 		local inv = meta:get_inventory()
 		local mem = techage.get_mem(pos)
 		
-		mem.filter = mem.filter or mConf.item_filter(pos, 50)
+		mem.filter = mem.filter or mConf.item_filter(pos, TA4_INV_SIZE)
-		mem.chest_configured = mem.chest_configured or 
+		mem.chest_configured = mem.chest_configured or not inv:is_empty("conf")
-				not mem.filter["unconfigured"] or #mem.filter["unconfigured"] < 50
 		
 		if mem.chest_configured then
 			local name = item:get_name()
@@ -395,9 +390,8 @@ techage.register_node({"techage:chest_ta4"}, {
 		local inv = meta:get_inventory()
 		local mem = techage.get_mem(pos)
 		
-		mem.filter = mem.filter or mConf.item_filter(pos, 50)
+		mem.filter = mem.filter or mConf.item_filter(pos, TA4_INV_SIZE)
-		mem.chest_configured = mem.chest_configured or 
+		mem.chest_configured = mem.chest_configured or not inv:is_empty("conf")
-				not mem.filter["unconfigured"] or #mem.filter["unconfigured"] < 50
 		
 		if mem.chest_configured then
 			local name = item:get_name()

techage/basic_machines/concentrator.lua

@@ -16,7 +16,6 @@
 local M = minetest.get_meta
 local S = techage.S
 
-local networks = techage.networks
 local Tube = techage.Tube
 
 local size = 2/8
@@ -29,7 +28,7 @@ local Boxes = {
 	{{-size, -size, -size, size, 0.5,  size}}, -- y+
 }
 
-local names = techage.register_junction("techage:concentrator", 2/8, Boxes, Tube, {
+local names = networks.register_junction("techage:concentrator", 2/8, Boxes, Tube, {
 	description = S("Tube Concentrator"),
 	tiles = {
 		"techage_tube_junction.png^techage_appl_arrow2.png^[transformR270",
@@ -40,18 +39,19 @@ local names = techage.register_junction("techage:concentrator", 2/8, Boxes, Tube
 		"techage_tube_junction.png^techage_appl_arrow2.png^[transformR270",
 	},
 	paramtype2 = "facedir", -- important!
+	use_texture_alpha = techage.CLIP,
 	groups = {snappy = 2, choppy = 2, oddly_breakable_by_hand = 3, techage_trowel = 1},
 	sounds = default.node_sound_defaults(),
 
 	after_place_node = function(pos, placer, itemstack, pointed_thing)
 		local node = minetest.get_node(pos)
-		local name = "techage:concentrator"..techage.junction_type(pos, Tube, "R", node.param2)
+		local name = "techage:concentrator"..networks.junction_type(pos, Tube, "R", node.param2)
 		minetest.swap_node(pos, {name = name, param2 = node.param2})
 		M(pos):set_int("push_dir", techage.side_to_outdir("R", node.param2))
 		Tube:after_place_node(pos)
 	end,
 	tubelib2_on_update2 = function(pos, dir1, tlib2, node)
-		local name = "techage:concentrator"..techage.junction_type(pos, Tube, "R", node.param2)
+		local name = "techage:concentrator"..networks.junction_type(pos, Tube, "R", node.param2)
 		minetest.swap_node(pos, {name = name, param2 = node.param2})
 	end,
 	after_dig_node = function(pos, oldnode, oldmetadata, digger)
@@ -67,7 +67,7 @@ techage.register_node(names, {
 	is_pusher = true,  -- is a pulling/pushing node
 })	
 
-names = techage.register_junction("techage:ta4_concentrator", 2/8, Boxes, Tube, {
+names = networks.register_junction("techage:ta4_concentrator", 2/8, Boxes, Tube, {
 	description = S("TA4 Tube Concentrator"),
 	tiles = {
 		"techage_tubeta4_junction.png^techage_appl_arrow2.png^[transformR270",
@@ -78,18 +78,19 @@ names = techage.register_junction("techage:ta4_concentrator", 2/8, Boxes, Tube,
 		"techage_tubeta4_junction.png^techage_appl_arrow2.png^[transformR270",
 	},
 	paramtype2 = "facedir", -- important!
+	use_texture_alpha = techage.CLIP,
 	groups = {snappy = 2, choppy = 2, oddly_breakable_by_hand = 3, techage_trowel = 1},
 	sounds = default.node_sound_defaults(),
 
 	after_place_node = function(pos, placer, itemstack, pointed_thing)
 		local node = minetest.get_node(pos)
-		local name = "techage:ta4_concentrator"..techage.junction_type(pos, Tube, "R", node.param2)
+		local name = "techage:ta4_concentrator"..networks.junction_type(pos, Tube, "R", node.param2)
 		minetest.swap_node(pos, {name = name, param2 = node.param2})
 		M(pos):set_int("push_dir", techage.side_to_outdir("R", node.param2))
 		Tube:after_place_node(pos)
 	end,
 	tubelib2_on_update2 = function(pos, dir1, tlib2, node)
-		local name = "techage:ta4_concentrator"..techage.junction_type(pos, Tube, "R", node.param2)
+		local name = "techage:ta4_concentrator"..networks.junction_type(pos, Tube, "R", node.param2)
 		minetest.swap_node(pos, {name = name, param2 = node.param2})
 	end,
 	after_dig_node = function(pos, oldnode, oldmetadata, digger)

techage/basic_machines/consumer.lua

@@ -27,10 +27,18 @@ local M = minetest.get_meta
 local CRD = function(pos) return (minetest.registered_nodes[techage.get_node_lvm(pos).name] or {}).consumer end
 local CRDN = function(node) return (minetest.registered_nodes[node.name] or {}).consumer end
 
-local power = techage.power
+local Tube = techage.Tube
-local networks = techage.networks
+local power = networks.power
-local Pipe = techage.LiquidPipe
+local liquid = networks.liquid
-local liquid = techage.liquid
+local CYCLE_TIME = 2
+
+local function get_keys(tbl)
+	local keys = {}
+	for k,v in pairs(tbl) do
+		keys[#keys + 1] = k
+	end
+	return keys
+end
 
 local function has_power(pos, nvm, state)
 	local crd = CRD(pos)
@@ -38,37 +46,53 @@ local function has_power(pos, nvm, state)
 end
 
 local function start_node(pos, nvm, state)
-	local crd = CRD(pos)
-	power.consumer_start(pos, crd.power_netw, crd.cycle_time)
 end
 
 local function stop_node(pos, nvm, state)
-	local crd = CRD(pos)
-	power.consumer_stop(pos, crd.power_netw)
 end
 
-local function on_power(pos)
+local function node_timer_pas(pos, elapsed)
 	local crd = CRD(pos)
 	local nvm = techage.get_nvm(pos)
-	crd.State:start(pos, nvm)
-end
 	
-local function on_nopower(pos)
+	-- handle power consumption
-	local crd = CRD(pos)
-	local nvm = techage.get_nvm(pos)
-	crd.State:nopower(pos, nvm)
-end
-
-
-local function node_timer(pos, elapsed)
-	local crd = CRD(pos)
-	local nvm = techage.get_nvm(pos)
 	if crd.power_netw and techage.needs_power(nvm) then
-		power.consumer_alive(pos, crd.power_netw, crd.cycle_time)
+		local consumed = power.consume_power(pos, crd.power_netw, nil, crd.power_consumption)
+		if consumed == crd.power_consumption then
+			crd.State:start(pos, nvm)
 		end
+	end
+	
 		-- call the node timer routine
 	if techage.is_operational(nvm) then
+		nvm.node_timer_call_cyle = (nvm.node_timer_call_cyle or 0) + 1
+		if nvm.node_timer_call_cyle >= crd.call_cycle then
 			crd.node_timer(pos, crd.cycle_time)
+			nvm.node_timer_call_cyle = 0
+		end
+	end
+	return crd.State:is_active(nvm)
+end
+
+local function node_timer_act(pos, elapsed)
+	local crd = CRD(pos)
+	local nvm = techage.get_nvm(pos)
+	
+	-- handle power consumption
+	if crd.power_netw and techage.needs_power(nvm) then
+		local consumed = power.consume_power(pos, crd.power_netw, nil, crd.power_consumption)
+		if consumed < crd.power_consumption then
+			crd.State:nopower(pos, nvm)
+		end
+	end
+	
+	-- call the node timer routine
+	if techage.is_operational(nvm) then
+		nvm.node_timer_call_cyle = (nvm.node_timer_call_cyle or 0) + 1
+		if nvm.node_timer_call_cyle >= crd.call_cycle then
+			crd.node_timer(pos, crd.cycle_time)
+			nvm.node_timer_call_cyle = 0
+		end
 	end
 	return crd.State:is_active(nvm)
 end
@@ -105,37 +129,17 @@ function techage.register_consumer(base_name, inv_name, tiles, tNode, validState
 			local power_network
 			local power_png = 'techage_axle_clutch.png'
 			local power_used = tNode.power_consumption ~= nil
-			local tNetworks
+			local sides
 			-- power needed?
 			if power_used then
 				if stage > 2 then
 					power_network = techage.ElectricCable
 					power_png = 'techage_appl_hole_electric.png'
-					tNetworks = {
+					sides = get_keys(tNode.power_sides or {F=1, B=1, U=1, D=1})
-						ele1 = {
-							sides = tNode.power_sides or {F=1, B=1, U=1, D=1},
-							ntype = "con1",
-							nominal = tNode.power_consumption[stage],
-							on_power = on_power,
-							on_nopower = on_nopower,
-							is_running = function(pos, nvm) return techage.is_running(nvm) end,
-						},
-					}
-					if tNode.networks and tNode.networks.pipe2 then
-						tNetworks.pipe2 = tNode.networks.pipe2
-					end
 				else
 					power_network = techage.Axle
 					power_png = 'techage_axle_clutch.png'
-					tNetworks = {
+					sides = get_keys(tNode.power_sides or {F=1, B=1, U=1, D=1})
-						axle = {
-							sides = tNode.power_sides or {F=1, B=1, U=1, D=1},
-							ntype = "con1",
-							nominal = tNode.power_consumption[stage],
-							on_power = on_power,
-							on_nopower = on_nopower,
-						}
-					}
 				end
 			end
 
@@ -143,7 +147,7 @@ function techage.register_consumer(base_name, inv_name, tiles, tNode, validState
 				node_name_passive = name_pas,
 				node_name_active = name_act,
 				infotext_name = name_inv,
-				cycle_time = tNode.cycle_time,
+				cycle_time = CYCLE_TIME,
 				standby_ticks = tNode.standby_ticks,
 				formspec_func = tNode.formspec,
 				on_state_change = tNode.on_state_change,
@@ -162,6 +166,7 @@ function techage.register_consumer(base_name, inv_name, tiles, tNode, validState
 				tNode.power_consumption[stage] or 0,
 				node_timer = tNode.node_timer,
 				cycle_time = tNode.cycle_time,
+				call_cycle = tNode.cycle_time / 2,
 				power_netw = power_network,
 			}
 
@@ -198,17 +203,6 @@ function techage.register_consumer(base_name, inv_name, tiles, tNode, validState
 				techage.del_mem(pos)
 			end
 			
-			local tubelib2_on_update2 = function(pos, outdir, tlib2, node) 
-				if tNode.tubelib2_on_update2 then
-					tNode.tubelib2_on_update2(pos, outdir, tlib2, node)
-				end
-				if tlib2.tube_type == "pipe2" then
-					liquid.update_network(pos, outdir, tlib2)
-				else
-					power.update_network(pos, outdir, tlib2)
-				end
-			end
-			
 			tNode.groups.not_in_creative_inventory = 0
 
 			local def_pas = {
@@ -221,20 +215,18 @@ function techage.register_consumer(base_name, inv_name, tiles, tNode, validState
 
 				can_dig = tNode.can_dig,
 				on_rotate = tNode.on_rotate or screwdriver.disallow,
-				on_timer = node_timer,
+				on_timer = node_timer_pas,
 				on_receive_fields = tNode.on_receive_fields,
 				on_rightclick = tNode.on_rightclick,
 				after_place_node = after_place_node,
 				after_dig_node = after_dig_node,
 				preserve_metadata = tNode.preserve_metadata,
-				tubelib2_on_update2 = tubelib2_on_update2,
 				allow_metadata_inventory_put = tNode.allow_metadata_inventory_put,
 				allow_metadata_inventory_move = tNode.allow_metadata_inventory_move,
 				allow_metadata_inventory_take = tNode.allow_metadata_inventory_take,
 				on_metadata_inventory_move = tNode.on_metadata_inventory_move,
 				on_metadata_inventory_put = tNode.on_metadata_inventory_put,
 				on_metadata_inventory_take = tNode.on_metadata_inventory_take,
-				networks = tNetworks and table.copy(tNetworks),
 
 				paramtype = tNode.paramtype,
 				paramtype2 = "facedir",
@@ -264,19 +256,17 @@ function techage.register_consumer(base_name, inv_name, tiles, tNode, validState
 				selection_box = tNode.selection_box,
 
 				on_rotate = tNode.on_rotate or screwdriver.disallow,
-				on_timer = node_timer,
+				on_timer = node_timer_act,
 				on_receive_fields = tNode.on_receive_fields,
 				on_rightclick = tNode.on_rightclick,
 				after_place_node = after_place_node,
 				after_dig_node = after_dig_node,
-				tubelib2_on_update2 = tubelib2_on_update2,
 				allow_metadata_inventory_put = tNode.allow_metadata_inventory_put,
 				allow_metadata_inventory_move = tNode.allow_metadata_inventory_move,
 				allow_metadata_inventory_take = tNode.allow_metadata_inventory_take,
 				on_metadata_inventory_move = tNode.on_metadata_inventory_move,
 				on_metadata_inventory_put = tNode.on_metadata_inventory_put,
 				on_metadata_inventory_take = tNode.on_metadata_inventory_take,
-				networks = tNetworks and table.copy(tNetworks),
 
 				paramtype = tNode.paramtype,
 				paramtype2 = "facedir",
@@ -297,9 +287,14 @@ function techage.register_consumer(base_name, inv_name, tiles, tNode, validState
 			minetest.register_node(name_act, def_act)
 
 			if power_used then
-				power_network:add_secondary_node_names({name_pas, name_act})
+				power.register_nodes({name_pas, name_act}, power_network, "con", sides)
 			end
 			techage.register_node({name_pas, name_act}, tNode.tubing)
+			
+			if tNode.tube_sides then
+				Tube:set_valid_sides(name_pas, get_keys(tNode.tube_sides))
+				Tube:set_valid_sides(name_act, get_keys(tNode.tube_sides))
+			end
 		end
 	end
 	return names[1], names[2], names[3]

techage/basic_machines/distributor.lua

@@ -357,7 +357,7 @@ local function on_receive_fields(pos, formname, fields, player)
 	end
 	local meta = M(pos)
 	local crd = CRD(pos)
-	local filter = minetest.deserialize(meta:get_string("filter"))
+	local filter = minetest.deserialize(meta:get_string("filter")) or {false,false,false,false}
 	if fields.filter1 ~= nil then
 		filter[1] = fields.filter1 == "true"
 	elseif fields.filter2 ~= nil then
@@ -385,7 +385,7 @@ end
 local function change_filter_settings(pos, slot, val)
 	local slots = {["red"] = 1, ["green"] = 2, ["blue"] = 3, ["yellow"] = 4}
 	local meta = M(pos)
-	local filter = minetest.deserialize(meta:get_string("filter"))
+	local filter = minetest.deserialize(meta:get_string("filter")) or {false,false,false,false}
 	local num = slots[slot] or 1
 	if num >= 1 and num <= 4 then
 		filter[num] = val == "on"
@@ -402,7 +402,7 @@ end
 -- techage command to read filter channel status (on/off)
 local function read_filter_settings(pos, slot)
 	local slots = {["red"] = 1, ["green"] = 2, ["blue"] = 3, ["yellow"] = 4}
-	local filter = minetest.deserialize(M(pos):get_string("filter"))
+	local filter = minetest.deserialize(M(pos):get_string("filter")) or {false,false,false,false}
 	return filter[slots[slot]] and "on" or "off"
 end
 

techage/basic_machines/gravelrinser.lua

@@ -293,6 +293,7 @@ local node_name_ta2, node_name_ta3, node_name_ta4 =
 		sounds = default.node_sound_wood_defaults(),
 		num_items = {0,1,1,1},
 		power_consumption = {0,3,3,3},
+		tube_sides = {L=1, R=1, U=1},
 	},
 	{false, true, true, false})  -- TA2/TA3
 

techage/basic_machines/gravelsieve.lua

@@ -3,7 +3,7 @@
 	TechAge
 	=======
 
-	Copyright (C) 2019 Joachim Stolberg
+	Copyright (C) 2019-2021 Joachim Stolberg
 
 	AGPL v3
 	See LICENSE.txt for more information
@@ -161,7 +161,6 @@ local tubing = {
 		local meta = minetest.get_meta(pos)
 		if meta:get_int("push_dir") == in_dir or in_dir == 5 then
 			local inv = M(pos):get_inventory()
-			--CRD(pos).State:start_if_standby(pos) -- would need power!
 			return techage.put_items(inv, "src", stack)
 		end
 	end,
@@ -217,6 +216,7 @@ local node_name_ta2, node_name_ta3, node_name_ta4 =
 		sounds = default.node_sound_wood_defaults(),
 		num_items = {0,1,2,4},
 		power_consumption = {0,3,4,5},
+		tube_sides = {L=1, R=1, U=1},
 	})
 
 minetest.register_craft({

techage/basic_machines/grinder.lua

@@ -3,7 +3,7 @@
 	TechAge
 	=======
 
-	Copyright (C) 2019 Joachim Stolberg
+	Copyright (C) 2019-2021 Joachim Stolberg
 
 	AGPL v3
 	See LICENSE.txt for more information
@@ -75,47 +75,53 @@ end
 
 -- Grinder normaly handles 'num_items' per cycle. 'num_items' is node stage dependent.
 -- But if 'inp_num' > 1 (wheat recipes), use 'inp_num'  and produce one output item.
-local function src_to_dst(src_stack, idx, num_items, inp_num, inv, dst_name, num_input)
+local function src_to_dst(src_stack, idx, src_name, num_items, inp_num, inv, dst_name)
-	local taken, output
 	if inp_num > 1 then
-		if src_stack:get_count() >= inp_num then
+		local input = ItemStack(src_name)
-			taken = src_stack:take_item(inp_num)
+		input:set_count(inp_num)
-			output = ItemStack(dst_name)
+		local output = ItemStack(dst_name)
-		else
+		if inv:contains_item("src", input) and inv:room_for_item("dst", output) then
-			return false
+			inv:remove_item("src", input)
+			inv:add_item("dst", output)
+			return true
 		end
 	else
-		taken = src_stack:take_item(num_items)
+		local taken = src_stack:take_item(num_items)
-		output = ItemStack(dst_name)
+		local output = ItemStack(dst_name)
 		output:set_count(output:get_count() * taken:get_count())
-	end
 		if inv:room_for_item("dst", output) then
 			inv:set_stack("src", idx, src_stack)
 			inv:add_item("dst", output)
 			return true
 		end
+	end
 	return false
 end
 			
 local function grinding(pos, crd, nvm, inv)
-	local num_items = 0
+	local blocked = false 	-- idle
 	for idx,stack in ipairs(inv:get_list("src")) do
 		if not stack:is_empty() then
 			local name = stack:get_name()
 			if Recipes[name] then
 				local recipe = Recipes[name]
-				if src_to_dst(stack, idx, crd.num_items, recipe.inp_num, inv, recipe.output) then
+				if src_to_dst(stack, idx, name, crd.num_items, recipe.inp_num, inv, recipe.output) then
 					crd.State:keep_running(pos, nvm, COUNTDOWN_TICKS)
+					return
 				else
-					crd.State:blocked(pos, nvm)
+					blocked = true
 				end
 			else
 				crd.State:fault(pos, nvm)
-			end
 				return
 			end
 		end
+	end
+	if blocked then
+		crd.State:blocked(pos, nvm)
+	else
 		crd.State:idle(pos, nvm)
+	end
 end
 
 local function keep_running(pos, elapsed)
@@ -241,6 +247,7 @@ local node_name_ta2, node_name_ta3, node_name_ta4 =
 		sounds = default.node_sound_wood_defaults(),
 		num_items = {0,1,2,4},
 		power_consumption = {0,4,6,9},
+		tube_sides = {L=1, R=1, U=1},
 	})
 
 minetest.register_craft({
@@ -252,23 +259,23 @@ minetest.register_craft({
 	},
 })
 
-minetest.register_craft({
+--minetest.register_craft({
-	output = node_name_ta3,
+--	output = node_name_ta3,
-	recipe = {
+--	recipe = {
-		{"", "default:mese_crystal", ""},
+--		{"", "default:mese_crystal", ""},
-		{"", node_name_ta2, ""},
+--		{"", node_name_ta2, ""},
-		{"", "techage:vacuum_tube", ""},
+--		{"", "techage:vacuum_tube", ""},
-	},
+--	},
-})
+--})
 
-minetest.register_craft({
+--minetest.register_craft({
-	output = node_name_ta4,
+--	output = node_name_ta4,
-	recipe = {
+--	recipe = {
-		{"", "default:mese_crystal", ""},
+--		{"", "default:mese_crystal", ""},
-		{"", node_name_ta3, ""},
+--		{"", node_name_ta3, ""},
-		{"", "techage:ta4_wlanchip", ""},
+--		{"", "techage:ta4_wlanchip", ""},
-	},
+--	},
-})
+--})
 
 if minetest.global_exists("unified_inventory") then
 	unified_inventory.register_craft_type("grinding", {

techage/basic_machines/pusher.lua

@@ -290,6 +290,7 @@ local node_name_ta2, node_name_ta3, node_name_ta4 =
 		is_ground_content = false,
 		sounds = default.node_sound_wood_defaults(),
 		num_items = {0,2,6,12},
+		tube_sides = {L=1, R=1},
 	})
 
 minetest.register_craft({

techage/basic_machines/source.lua

@@ -3,12 +3,12 @@
 	TechAge
 	=======
 
-	Copyright (C) 2019-2020 Joachim Stolberg
+	Copyright (C) 2019-2021 Joachim Stolberg
 
 	AGPL v3
 	See LICENSE.txt for more information
 
-	TA2/TA3/TA4 Power Test Source
+	TA2/TA3 Power Test Source
 	
 ]]--
 
@@ -18,26 +18,17 @@ local M = minetest.get_meta
 local S = techage.S
 
 local Axle = techage.Axle
-local Pipe = techage.SteamPipe
+--local Pipe = techage.SteamPipe
 local Cable = techage.ElectricCable
-local power = techage.power
+local power = networks.power
-local networks = techage.networks
+local control = networks.control
 
 local STANDBY_TICKS = 4
-local COUNTDOWN_TICKS = 4
 local CYCLE_TIME = 2
-local PWR_CAPA = 100
+local PWR_PERF = 100
 
 local function formspec(self, pos, nvm)
-	return "size[4,4]"..
+	return techage.generator_formspec(self, pos, nvm, S("Power Source"), nvm.provided, PWR_PERF)
-		"box[0,-0.1;3.8,0.5;#c6e8ff]"..
-		"label[1,-0.1;"..minetest.colorize( "#000000", S("Power Source")).."]"..
-		default.gui_bg..
-		default.gui_bg_img..
-		default.gui_slots..
-		power.formspec_label_bar(pos, 0, 0.8, S("power"), PWR_CAPA, nvm.provided)..
-		"image_button[2.8,2;1,1;".. self:get_state_button_image(nvm) ..";state_button;]"..
-		"tooltip[2.8,2;1,1;"..self:get_state_tooltip(nvm).."]"
 end
 
 -- Axles texture animation
@@ -47,44 +38,36 @@ local function switch_axles(pos, on)
 end
 
 local function start_node2(pos, nvm, state)
-	nvm.generating = true
+	nvm.running = true
+	nvm.provided = 0
 	local outdir = M(pos):get_int("outdir")
-	power.generator_start(pos, Axle, CYCLE_TIME, outdir)
 	switch_axles(pos, true)
+	power.start_storage_calc(pos, Axle, outdir)
 end
 
 local function stop_node2(pos, nvm, state)
-	nvm.generating = false
+	nvm.running = false
 	nvm.provided = 0
+	nvm.load = 0
 	local outdir = M(pos):get_int("outdir")
-	power.generator_stop(pos, Axle, outdir)
 	switch_axles(pos, false)
+	power.start_storage_calc(pos, Axle, outdir)
 end
 
 local function start_node3(pos, nvm, state)
-	nvm.generating = true
+	local meta = M(pos) 
-	local outdir = M(pos):get_int("outdir")
+	nvm.running = true
-	power.generator_start(pos, Pipe, CYCLE_TIME, outdir)
+	nvm.provided = 0
+	techage.evaluate_charge_termination(nvm, meta)
+	local outdir = meta:get_int("outdir")
+	power.start_storage_calc(pos, Cable, outdir)
 end
 
 local function stop_node3(pos, nvm, state)
-	nvm.generating = false
+	nvm.running = false
 	nvm.provided = 0
 	local outdir = M(pos):get_int("outdir")
-	power.generator_stop(pos, Pipe, outdir)
+	power.start_storage_calc(pos, Cable, outdir)
-end
-
-local function start_node4(pos, nvm, state)
-	nvm.generating = true
-	local outdir = M(pos):get_int("outdir")
-	power.generator_start(pos, Cable, CYCLE_TIME, outdir)
-end
-
-local function stop_node4(pos, nvm, state)
-	nvm.generating = false
-	nvm.provided = 0
-	local outdir = M(pos):get_int("outdir")
-	power.generator_stop(pos, Cable, outdir)
 end
 
 local State2 = techage.NodeStates:new({
@@ -97,7 +80,7 @@ local State2 = techage.NodeStates:new({
 })
 
 local State3 = techage.NodeStates:new({
-	node_name_passive = "techage:t3_source",
+	node_name_passive = "techage:t4_source",
 	cycle_time = CYCLE_TIME,
 	standby_ticks = STANDBY_TICKS,
 	formspec_func = formspec,
@@ -105,44 +88,32 @@ local State3 = techage.NodeStates:new({
 	stop_node = stop_node3,
 })
 
-local State4 = techage.NodeStates:new({
-	node_name_passive = "techage:t4_source",
-	cycle_time = CYCLE_TIME,
-	standby_ticks = STANDBY_TICKS,
-	formspec_func = formspec,
-	start_node = start_node4,
-	stop_node = stop_node4,
-})
-
 local function node_timer2(pos, elapsed)
 	--print("node_timer2")
+	local meta = M(pos)
 	local nvm = techage.get_nvm(pos)
-	local outdir = M(pos):get_int("outdir")
+	local outdir = meta:get_int("outdir")
-	nvm.provided = power.generator_alive(pos, Axle, CYCLE_TIME, outdir)
+	local tp1 = tonumber(meta:get_string("termpoint1"))
+	local tp2 = tonumber(meta:get_string("termpoint2"))
+	nvm.provided = power.provide_power(pos, Axle, outdir, PWR_PERF, tp1, tp2)
+	nvm.load = power.get_storage_load(pos, Axle, outdir, PWR_PERF)
 	if techage.is_activeformspec(pos) then
-		M(pos):set_string("formspec", formspec(State2, pos, nvm))
+		meta:set_string("formspec", formspec(State2, pos, nvm))
 	end
 	return true
 end
 
 local function node_timer3(pos, elapsed)
-	--print("node_timer3")
-	local nvm = techage.get_nvm(pos)
-	local outdir = M(pos):get_int("outdir")
-	nvm.provided = power.generator_alive(pos, Pipe, CYCLE_TIME, outdir)
-	if techage.is_activeformspec(pos) then
-		M(pos):set_string("formspec", formspec(State3, pos, nvm))
-	end
-	return true
-end
-
-local function node_timer4(pos, elapsed)
 	--print("node_timer4")
+	local meta = M(pos)
 	local nvm = techage.get_nvm(pos)
 	local outdir = M(pos):get_int("outdir")
-	nvm.provided = power.generator_alive(pos, Cable, CYCLE_TIME, outdir)
+	local tp1 = tonumber(meta:get_string("termpoint1"))
+	local tp2 = tonumber(meta:get_string("termpoint2"))
+	nvm.provided = power.provide_power(pos, Cable, outdir, PWR_PERF, tp1, tp2)
+	nvm.load = power.get_storage_load(pos, Cable, outdir, PWR_PERF)
 	if techage.is_activeformspec(pos) then
-		M(pos):set_string("formspec", formspec(State4, pos, nvm))
+		meta:set_string("formspec", formspec(State3, pos, nvm))
 	end
 	return true
 end
@@ -165,15 +136,6 @@ local function on_receive_fields3(pos, formname, fields, player)
 	M(pos):set_string("formspec", formspec(State3, pos, nvm))
 end
 
-local function on_receive_fields4(pos, formname, fields, player)
-	if minetest.is_protected(pos, player:get_player_name()) then
-		return
-	end
-	local nvm = techage.get_nvm(pos)
-	State4:state_button_event(pos, nvm, fields)
-	M(pos):set_string("formspec", formspec(State4, pos, nvm))
-end
-
 local function on_rightclick2(pos, node, clicker)
 	techage.set_activeformspec(pos, clicker)
 	local nvm = techage.get_nvm(pos)
@@ -186,12 +148,6 @@ local function on_rightclick3(pos, node, clicker)
 	M(pos):set_string("formspec", formspec(State3, pos, nvm))
 end
 
-local function on_rightclick4(pos, node, clicker)
-	techage.set_activeformspec(pos, clicker)
-	local nvm = techage.get_nvm(pos)
-	M(pos):set_string("formspec", formspec(State4, pos, nvm))
-end
-
 local function after_place_node2(pos)
 	local nvm = techage.get_nvm(pos)
 	State2:node_init(pos, nvm, "")
@@ -202,17 +158,10 @@ end
 
 local function after_place_node3(pos)
 	local nvm = techage.get_nvm(pos)
-	State3:node_init(pos, nvm, "")
+	local number = techage.add_node(pos, "techage:t4_source")
+	State3:node_init(pos, nvm, number)
 	M(pos):set_int("outdir", networks.side_to_outdir(pos, "R"))
 	M(pos):set_string("formspec", formspec(State3, pos, nvm))
-	Pipe:after_place_node(pos)
-end
-
-local function after_place_node4(pos)
-	local nvm = techage.get_nvm(pos)
-	State4:node_init(pos, nvm, "")
-	M(pos):set_int("outdir", networks.side_to_outdir(pos, "R"))
-	M(pos):set_string("formspec", formspec(State4, pos, nvm))
 	Cable:after_place_node(pos)
 end
 
@@ -222,44 +171,17 @@ local function after_dig_node2(pos, oldnode)
 end
 
 local function after_dig_node3(pos, oldnode)
-	Pipe:after_dig_node(pos)
-	techage.del_mem(pos)
-end
-
-local function after_dig_node4(pos, oldnode)
 	Cable:after_dig_node(pos)
 	techage.del_mem(pos)
 end
 
-local function tubelib2_on_update2(pos, outdir, tlib2, node) 
+local function get_generator_data(pos, outdir, tlib2)
-	power.update_network(pos, outdir, tlib2)
+	local nvm = techage.get_nvm(pos)
+	if nvm.running then
+		return {level = (nvm.load or 0) / PWR_PERF, perf = PWR_PERF, capa = PWR_PERF * 2}
+	end
 end
 
-local net_def2 = {
-	axle = {
-		sides = {R = 1},
-		ntype = "gen1",
-		nominal = PWR_CAPA,
-	},
-}
-
-local net_def3 = {
-	pipe1 = {
-		sides = {R = 1},
-		ntype = "gen1",
-		nominal = PWR_CAPA,
-	},
-}
-
-local net_def4 = {
-	ele1 = {
-		sides = {R = 1},
-		ntype = "gen1",
-		nominal = PWR_CAPA,
-	},
-}
-
-
 minetest.register_node("techage:t2_source", {
 	description = S("Axle Power Source"),
 	tiles = {
@@ -280,32 +202,7 @@ minetest.register_node("techage:t2_source", {
 	on_timer = node_timer2,
 	after_place_node = after_place_node2,
 	after_dig_node = after_dig_node2,
-	tubelib2_on_update2 = tubelib2_on_update2,
+	get_generator_data = get_generator_data,
-	networks = net_def2,
-})
-
-minetest.register_node("techage:t3_source", {
-	description = S("Steam Power Source"),
-	tiles = {
-		-- up, down, right, left, back, front
-		"techage_filling_ta3.png^techage_frame_ta3_top.png",
-		"techage_filling_ta3.png^techage_frame_ta3.png",
-		"techage_filling_ta3.png^techage_steam_hole.png^techage_frame_ta3.png",
-		"techage_filling_ta3.png^techage_frame_ta3.png^techage_appl_source.png",
-		"techage_filling_ta3.png^techage_frame_ta3.png^techage_appl_source.png",
-		"techage_filling_ta3.png^techage_frame_ta3.png^techage_appl_source.png",
-	},
-	paramtype2 = "facedir",
-	groups = {cracky=2, crumbly=2, choppy=2},
-	on_rotate = screwdriver.disallow,
-	is_ground_content = false,
-	on_receive_fields = on_receive_fields3,
-	on_rightclick = on_rightclick3,
-	on_timer = node_timer3,
-	after_place_node = after_place_node3,
-	after_dig_node = after_dig_node3,
-	tubelib2_on_update2 = tubelib2_on_update2,
-	networks = net_def3,
 })
 
 minetest.register_node("techage:t4_source", {
@@ -323,15 +220,47 @@ minetest.register_node("techage:t4_source", {
 	groups = {cracky=2, crumbly=2, choppy=2},
 	on_rotate = screwdriver.disallow,
 	is_ground_content = false,
-	on_receive_fields = on_receive_fields4,
+	on_receive_fields = on_receive_fields3,
-	on_rightclick = on_rightclick4,
+	on_rightclick = on_rightclick3,
-	on_timer = node_timer4,
+	on_timer = node_timer3,
-	after_place_node = after_place_node4,
+	after_place_node = after_place_node3,
-	after_dig_node = after_dig_node4,
+	after_dig_node = after_dig_node3,
-	tubelib2_on_update2 = tubelib2_on_update2,
+	get_generator_data = get_generator_data,
-	networks = net_def4,
+	ta3_formspec = techage.generator_settings("ta3", PWR_PERF),
 })
 
-Axle:add_secondary_node_names({"techage:t2_source"})
+power.register_nodes({"techage:t2_source"}, Axle, "gen", {"R"})
---Pipe:add_secondary_node_names({"techage:t3_source"})
+power.register_nodes({"techage:t4_source"}, Cable, "gen", {"R"})
-Cable:add_secondary_node_names({"techage:t4_source"})
+
+techage.register_node({"techage:t4_source"}, {
+	on_recv_message = function(pos, src, topic, payload)
+		local nvm = techage.get_nvm(pos)
+		if topic == "delivered" then
+			return nvm.provided or 0
+		else
+			return State3:on_receive_message(pos, topic, payload)
+		end
+	end,
+})	
+
+control.register_nodes({"techage:t4_source"}, {
+		on_receive = function(pos, tlib2, topic, payload)
+		end,
+		on_request = function(pos, tlib2, topic)
+			if topic == "info" then
+				local nvm = techage.get_nvm(pos)
+				local meta = M(pos)
+				return {
+					type = S("Ele Power Source"),
+					number = meta:get_string("node_number") or "",
+					running = nvm.running or false,
+					available = PWR_PERF,
+					provided = nvm.provided or 0,
+					termpoint = meta:get_string("termpoint"), 
+				}
+			end
+			return false
+		end,
+	}
+)
+

techage/basis/command.lua

@@ -26,7 +26,7 @@ local techage_use_sqlite = minetest.settings:get_bool('techage_use_sqlite', fals
 local string_split = string.split
 local NodeDef = techage.NodeDef
 local Tube = techage.Tube
-local is_cart_available = minecart.is_cart_available
+local is_cart_available = minecart.is_nodecart_available
 
 -------------------------------------------------------------------
 -- Database
@@ -164,6 +164,19 @@ local function is_air_like(name)
 	return false
 end
 
+techage.SystemTime = 0
+minetest.register_globalstep(function(dtime)
+	techage.SystemTime = techage.SystemTime + dtime
+end)
+
+-- used by TA1 hammer: dug_node[player_name] = pos
+techage.dug_node = {}
+minetest.register_on_dignode(function(pos, oldnode, digger)
+	if not digger then return end
+	-- store pos for tools without own 'register_on_dignode'
+	techage.dug_node[digger:get_player_name()] = pos
+end)
+
 -------------------------------------------------------------------
 -- API helper functions
 -------------------------------------------------------------------

techage/basis/conf_inv.lua

@@ -91,15 +91,15 @@ end
 
 function inv_lib.take_item(pos, inv, listname, num, stacks)
 	local mem = techage.get_mem(pos)
-	local size = #stacks
 	mem.ta_startpos = mem.ta_startpos or 1
-	for idx = mem.ta_startpos, mem.ta_startpos + size do
+	local size = #(stacks or {})
-		idx = (idx % size) + 1
+	for i = 1, size do
+		local idx = stacks[((i + mem.ta_startpos) % size) + 1]
 		local stack = inv:get_stack(listname, idx)
 		local taken = stack:take_item(num)
 		if taken:get_count() > 0 then
 			inv:set_stack(listname, idx, stack)
-			mem.ta_startpos = idx
+			mem.ta_startpos = mem.ta_startpos + i
 			return taken
 		end
 	end

techage/basis/firebox_lib.lua

@@ -3,7 +3,7 @@
 	TechAge
 	=======
 
-	Copyright (C) 2019 Joachim Stolberg
+	Copyright (C) 2019-2021 Joachim Stolberg
 
 	AGPL v3
 	See LICENSE.txt for more information

techage/basis/fuel_lib.lua

@@ -3,7 +3,7 @@
 	TechAge
 	=======
 
-	Copyright (C) 2019-2020 Joachim Stolberg
+	Copyright (C) 2019-2021 Joachim Stolberg
 
 	AGPL v3
 	See LICENSE.txt for more information
@@ -17,7 +17,7 @@ local P2S = minetest.pos_to_string
 local M = minetest.get_meta
 local S = techage.S
 local Pipe = techage.LiquidPipe
-local liquid = techage.liquid
+local liquid = networks.liquid
 local ValidOilFuels = techage.firebox.ValidOilFuels
 local Burntime = techage.firebox.Burntime
 
@@ -28,11 +28,12 @@ local BLOCKING_TIME = 0.3 -- 300ms
 
 techage.fuel.CAPACITY = CAPACITY
 
--- fuel burning categories (better than...)
+-- fuel burning categories (equal or better than...)
-techage.fuel.BT_BITUMEN = 4
+techage.fuel.BT_BITUMEN  = 5
-techage.fuel.BT_OIL     = 3
+techage.fuel.BT_OIL      = 4
-techage.fuel.BT_FUELOIL = 2
+techage.fuel.BT_FUELOIL  = 3
-techage.fuel.BT_NAPHTHA = 1
+techage.fuel.BT_NAPHTHA  = 2
+techage.fuel.BT_GASOLINE = 1
 
 
 function techage.fuel.fuel_container(x, y, nvm)
@@ -41,7 +42,7 @@ function techage.fuel.fuel_container(x, y, nvm)
 		itemname = nvm.liquid.name.." "..nvm.liquid.amount
 	end
 	local fuel_percent = 0
-	if nvm.running then
+	if nvm.running or techage.is_running(nvm) then
 		fuel_percent = ((nvm.burn_cycles or 1) * 100) / (nvm.burn_cycles_total or 1)
 	end
 	return "container["..x..","..y.."]"..
@@ -95,6 +96,7 @@ function techage.fuel.burntime(name)
 	return 0.01 -- not zero !
 end
 
+-- equal or better than the given category (see 'techage.fuel.BT_BITUMEN,...')
 function techage.fuel.valid_fuel(name, category)
 	return ValidOilFuels[name] and ValidOilFuels[name] <= category
 end
@@ -109,7 +111,7 @@ function techage.fuel.on_punch(pos, node, puncher, pointed_thing)
 	
 	local wielded_item = puncher:get_wielded_item():get_name()
 	local item_count = puncher:get_wielded_item():get_count()
-	local new_item = liquid.fill_on_punch(nvm, wielded_item, item_count, puncher) 
+	local new_item = techage.liquid.fill_on_punch(nvm, wielded_item, item_count, puncher) 
 	if new_item then
 		puncher:set_wielded_item(new_item)
 		M(pos):set_string("formspec", techage.fuel.formspec(pos, nvm))
@@ -117,11 +119,11 @@ function techage.fuel.on_punch(pos, node, puncher, pointed_thing)
 		return
 	end
 		
-	local ldef = liquid.get_liquid_def(wielded_item)
+	local ldef = techage.liquid.get_liquid_def(wielded_item)
 	if ldef and ValidOilFuels[ldef.inv_item] then
 		local lqd = (minetest.registered_nodes[node.name] or {}).liquid
 		if not lqd.fuel_cat or ValidOilFuels[ldef.inv_item] <= lqd.fuel_cat then
-			local new_item = liquid.empty_on_punch(pos, nvm, wielded_item, item_count)
+			local new_item = techage.liquid.empty_on_punch(pos, nvm, wielded_item, item_count)
 			if new_item then
 				puncher:set_wielded_item(new_item)
 				M(pos):set_string("formspec", techage.fuel.formspec(pos, nvm))
@@ -154,3 +156,42 @@ function techage.fuel.get_fuel_amount(nvm)
 	end
 	return 0
 end
+
+function techage.fuel.get_liquid_table(valid_fuel, capacity, start_firebox)
+	return {
+		capa = capacity,
+		fuel_cat = valid_fuel,
+		peek = function(pos)
+			local nvm = techage.get_nvm(pos)
+			return liquid.srv_peek(nvm)
+		end,
+		put = function(pos, indir, name, amount)
+			if techage.fuel.valid_fuel(name, valid_fuel) then
+				local nvm = techage.get_nvm(pos)
+				local res = liquid.srv_put(nvm, name, amount, capacity)
+				start_firebox(pos, nvm)
+				if techage.is_activeformspec(pos) then
+					M(pos):set_string("formspec", techage.fuel.formspec(nvm))
+				end
+				return res
+			end
+			return amount
+		end,
+		take = function(pos, indir, name, amount)
+			local nvm = techage.get_nvm(pos)
+			amount, name = liquid.srv_take(nvm, name, amount)
+			if techage.is_activeformspec(pos) then
+				M(pos):set_string("formspec", techage.fuel.formspec(nvm))
+			end
+			return amount, name
+		end,
+		untake = function(pos, indir, name, amount)
+			local nvm = techage.get_nvm(pos)
+			local leftover = liquid.srv_put(nvm, name, amount, capacity)
+			if techage.is_activeformspec(pos) then
+				M(pos):set_string("formspec", techage.fuel.formspec(nvm))
+			end
+			return leftover
+		end
+	}
+end

techage/basis/legacy.lua

@@ -0,0 +1,25 @@
+--[[
+
+	TechAge
+	=======
+
+	Copyright (C) 2019-2021 Joachim Stolberg
+
+	AGPL v3
+	See LICENSE.txt for more information
+	
+	For the transition from v0.26 to v1.0
+
+]]--
+
+function techage.register_node_for_v1_transition(nodenames, on_node_load)
+	minetest.register_lbm({
+		label = "[TechAge] V1 transition",
+		name = nodenames[1].."transition",
+		nodenames = nodenames,
+		run_at_every_load = false,
+		action = function(pos, node)
+			on_node_load(pos, node)
+		end
+	})
+end

techage/basis/lib.lua

@@ -15,6 +15,7 @@
 -- for lazy programmers
 local P = minetest.string_to_pos
 local M = minetest.get_meta
+local S = techage.S
 
 -- Input data to generate the Param2ToDir table
 local Input = {
@@ -336,3 +337,9 @@ function techage.question_mark_help(width, tooltip)
 		"tooltip["..x..",-0.1;0.5,0.5;"..tooltip..";#0C3D32;#FFFFFF]"
 end
 
+function techage.wrench_tooltip(x, y)
+	local tooltip = S("Block has an\nadditional wrench menu")
+	return "label["..x..","..y..";"..minetest.colorize("#000000", minetest.formspec_escape("[?]")).."]"..
+		"tooltip["..x..","..y..";0.5,0.5;"..tooltip..";#0C3D32;#FFFFFF]"
+end
+

techage/basis/networks.lua

@@ -1,362 +0,0 @@
---[[
-
-	TechAge
-	=======
-
-	Copyright (C) 2019 Joachim Stolberg
-
-	AGPL v3
-	See LICENSE.txt for more information
-	
-	Networks - the connection of tubelib2 tube/pipe/cable lines to networks
-]]--
-
-local S2P = minetest.string_to_pos
-local P2S = minetest.pos_to_string
-local M = minetest.get_meta
-local N = techage.get_node_lvm
-local S = techage.S
-local hex = function(val) return string.format("%x", val) end
-
-local Networks = {} -- cache for networks
-
-techage.networks = {}  -- name space
-
-local MAX_NUM_NODES = 1000
-local BEST_BEFORE = 5 * 60  -- 5 minutes
-local Route = {} -- Used to determine the already passed nodes while walking
-local NumNodes = 0
-local DirToSide = {"B", "R", "F", "L", "D", "U"}
-local Sides = {B = true, R = true, F = true, L = true, D = true, U = true}
-local SideToDir = {B=1, R=2, F=3, L=4, D=5, U=6}
-local Flip = {[0]=0,3,4,1,2,6,5} -- 180 degree turn
-
-local function error(pos, msg)
-	minetest.log("error", "[techage] "..msg.." at "..P2S(pos).." "..N(pos).name)
-end
-
-local function count_nodes(ntype, nodes)
-	local num = 0
-	for _,pos in ipairs(nodes or {}) do
-		num = num + 1
-	end
-	return ntype.."="..num
-end
-
-local function output(network, valid)
-	local tbl = {}
-	for ntype,table in pairs(network) do
-		if type(table) == "table" then
-			tbl[#tbl+1] = count_nodes(ntype, table)
-		end
-	end
-	print("Network ("..valid.."): "..table.concat(tbl, ", "))
-end
-
-local function debug(ntype)
-	local tbl = {}
-	for netID,netw in pairs(Networks[ntype] or {}) do
-		if type(netw) == "table" then
-			tbl[#tbl+1] = string.format("%X", netID)
-		end
-	end
-	return "Networks: "..table.concat(tbl, ", ")
-end
-
-local function hidden_node(pos, net_name)
-	local name = M(pos):get_string("techage_hidden_nodename")
-	local ndef = minetest.registered_nodes[name]
-	if ndef and ndef.networks then
-		return ndef.networks[net_name] or {} 
-	end
-	return {}
-end
-
--- return the node definition local networks table
-local function net_def(pos, net_name) 
-	local ndef = minetest.registered_nodes[techage.get_node_lvm(pos).name]
-	if ndef and ndef.networks then
-		return ndef.networks[net_name] or {} 
-	else  -- hidden junction
-		return hidden_node(pos, net_name)
-	end
-end
-
-local function net_def2(pos, node_name, net_name) 
-	local ndef = minetest.registered_nodes[node_name]
-	if ndef and ndef.networks then
-		return ndef.networks[net_name] or {} 
-	else  -- hidden junction
-		return hidden_node(pos, net_name)
-	end
-end
-
-local function connected(tlib2, pos, dir)
-	local param2, npos = tlib2:get_primary_node_param2(pos, dir)
-	if param2 then
-		local d1, d2, num = tlib2:decode_param2(npos, param2)
-		if not num then return end
-		return Flip[dir] == d1 or Flip[dir] == d2
-	end
-	-- secondary nodes allowed?
-	if tlib2.force_to_use_tubes then
-		return tlib2:is_special_node(pos, dir)
-	else
-		return tlib2:is_secondary_node(pos, dir)
-	end
-	return false
-end
-
--- Calculate the node outdir based on node.param2 and nominal dir (according to side)
-local function dir_to_outdir(dir, param2)
-	if dir < 5 then
-		return ((dir + param2 - 1) % 4) + 1
-	end
-	return dir
-end
-
-local function indir_to_dir(indir, param2)
-	if indir < 5 then
-		return ((indir - param2 + 5) % 4) + 1
-	end
-	return Flip[indir]
-end
-
-local function outdir_to_dir(outdir, param2)
-	if outdir < 5 then
-		return ((outdir - param2 + 3) % 4) + 1
-	end
-	return outdir
-end
-
-local function side_to_outdir(pos, side)
-	return dir_to_outdir(SideToDir[side], techage.get_node_lvm(pos).param2)
-end
-
--- Get tlib2 connection dirs as table
--- used e.g. for the connection walk
-local function get_node_connections(pos, net_name)
-	local val = M(pos):get_int(net_name.."_conn")
-    local tbl = {}
-    if val % 0x40 >= 0x20 then tbl[#tbl+1] = 1 end
-    if val % 0x20 >= 0x10 then tbl[#tbl+1] = 2 end
-    if val % 0x10 >= 0x08 then tbl[#tbl+1] = 3 end
-    if val % 0x08 >= 0x04 then tbl[#tbl+1] = 4 end
-    if val % 0x04 >= 0x02 then tbl[#tbl+1] = 5 end
-    if val % 0x02 >= 0x01 then tbl[#tbl+1] = 6 end
-    return tbl
-end
-
--- store all node sides with tube connections as nodemeta
-local function node_connections(pos, tlib2)
-	local node = techage.get_node_lvm(pos)
-	local val = 0
-	local ndef = net_def2(pos, node.name, tlib2.tube_type)
-	local sides = ndef.sides or ndef.get_sides and ndef.get_sides(pos, node)
-	if sides then
-		for dir = 1,6 do
-			val = val * 2
-			local side = DirToSide[outdir_to_dir(dir, node.param2)]
-			if sides[side] then
-				if connected(tlib2, pos, dir) then
-					--techage.mark_side("singleplayer", pos, dir, "node_connections", "", 1)--------------------
-					val = val + 1
-				end
-			end
-		end
-		M(pos):set_int(tlib2.tube_type.."_conn", val)
-	else
-		--error(pos, "sides missing")
-	end
-end
-
-local function pos_already_reached(pos)
-	local key = minetest.hash_node_position(pos)
-	if not Route[key] and NumNodes < MAX_NUM_NODES then
-		Route[key] = true
-		NumNodes = NumNodes + 1
-		return false
-	end
-	return true
-end
-
--- check if the given pipe dir into the node is valid
-local function valid_indir(pos, indir, node, net_name)
-	local ndef = net_def2(pos, node.name, net_name)
-	local sides = ndef.sides or ndef.get_sides and ndef.get_sides(pos, node)
-	local side = DirToSide[indir_to_dir(indir, node.param2)]
-	if not sides or sides and not sides[side] then return false end
-	return true
-end
-
-local function is_junction(pos, name, tube_type)
-	local ndef = net_def2(pos, name, tube_type)
-	-- ntype can be a string or an array of strings or nil
-	if ndef.ntype == "junc" then
-		return true
-	end
-	if type(ndef.ntype) == "table" then
-		for _,ntype in ipairs(ndef.ntype) do
-			if ntype == "junc" then 
-				return true 
-			end
-		end
-	end
-	return false
-end
-
--- do the walk through the tubelib2 network
--- indir is the direction which should not be covered by the walk
--- (coming from there)
--- if outdirs is given, only this dirs are used
-local function connection_walk(pos, outdirs, indir, node, tlib2, clbk)
-	if clbk then clbk(pos, indir, node) end
-	--techage.mark_position("singleplayer", pos, "walk", "", 1)
-	--print("connection_walk", node.name, outdirs or is_junction(pos, node.name, tlib2.tube_type))
-	if outdirs or is_junction(pos, node.name, tlib2.tube_type) then
-		for _,outdir in pairs(outdirs or get_node_connections(pos, tlib2.tube_type)) do
-			--techage.mark_side("singleplayer", pos, outdir, "connection_walk", "", 3)--------------------
-			--print("get_node_connections", node.name, outdir)
-			local pos2, indir2 = tlib2:get_connected_node_pos(pos, outdir)
-			local node = techage.get_node_lvm(pos2)
-			if pos2 and not pos_already_reached(pos2) and valid_indir(pos2, indir2, node, tlib2.tube_type) then
-				connection_walk(pos2, nil, indir2, node, tlib2, clbk)
-			end
-		end
-	end
-end
-
-local function collect_network_nodes(pos, outdir, tlib2)
-	Route = {}
-	NumNodes = 0
-	pos_already_reached(pos) 
-	local netw = {}
-	local node = techage.get_node_lvm(pos)
-	local net_name = tlib2.tube_type
-	-- outdir corresponds to the indir coming from
-	connection_walk(pos, outdir and {outdir}, nil, node, tlib2, function(pos, indir, node)
-		local ndef = net_def2(pos, node.name, net_name)
-		-- ntype can be a string or an array of strings or nil
-		local ntypes = ndef.ntype or {}
-		if type(ntypes) == "string" then
-			ntypes = {ntypes}
-		end
-		for _,ntype in ipairs(ntypes) do
-			if not netw[ntype] then netw[ntype] = {} end
-			netw[ntype][#netw[ntype] + 1] = {pos = pos, indir = indir, nominal = ndef.nominal, regenerative = ndef.regenerative}
-		end
-	end)
-	netw.best_before = minetest.get_gametime() + BEST_BEFORE
-	netw.num_nodes = NumNodes
-	return netw
-end
-
--- keep data base small and valid
--- needed for networks without scheduler
-local function remove_outdated_networks()
-	local to_be_deleted = {}
-	local t = minetest.get_gametime()
-	for net_name,tbl in pairs(Networks) do
-		for netID,network in pairs(tbl) do
-			local valid = (network.best_before or 0) - t
-			--output(network, valid)
-			if valid < 0 then
-				to_be_deleted[#to_be_deleted+1] = {net_name, netID}
-			end
-		end
-	end
-	for _,item in ipairs(to_be_deleted) do
-		local net_name, netID = unpack(item)
-		Networks[net_name][netID] = nil
-	end
-	minetest.after(60, remove_outdated_networks)
-end
-minetest.after(60, remove_outdated_networks)
-
---
--- API Functions
---
-
--- Table fo a 180 degree turn
-techage.networks.Flip = Flip
-
--- techage.networks.net_def(pos, net_name)
-techage.networks.net_def = net_def
-
-techage.networks.AllSides = Sides -- table for all 6 node sides
-
--- techage.networks.side_to_outdir(pos, side)
-techage.networks.side_to_outdir = side_to_outdir
-
--- techage.networks.node_connections(pos, tlib2)
-techage.networks.node_connections = node_connections
-
--- techage.networks.collect_network_nodes(pos, outdir, tlib2)
-techage.networks.collect_network_nodes = collect_network_nodes
-
-function techage.networks.connection_walk(pos, outdir, tlib2, clbk)
-	Route = {}
-	NumNodes = 0
-	pos_already_reached(pos) -- don't consider the start pos
-	local node = techage.get_node_lvm(pos)
-	connection_walk(pos, outdir and {outdir}, Flip[outdir], node, tlib2, clbk)
-	return NumNodes
-end
-
--- return network without maintainting the "alive" data
-function techage.networks.peek_network(tube_type, netID)
-	--print("peek_network", debug(tube_type))
-	return Networks[tube_type] and Networks[tube_type][netID]
-end
-
-function techage.networks.set_network(tube_type, netID, network)
-	if netID then
-		if not Networks[tube_type] then
-			Networks[tube_type] = {}
-		end
-		Networks[tube_type][netID] = network
-		Networks[tube_type][netID].best_before = minetest.get_gametime() + BEST_BEFORE
-	end
-end
-
-
---
--- Power API
---
-function techage.networks.has_network(tube_type, netID)
-	return Networks[tube_type] and Networks[tube_type][netID]
-end
-
-function techage.networks.build_network(pos, outdir, tlib2, netID)
-	local netw = collect_network_nodes(pos, outdir, tlib2)
-	Networks[tlib2.tube_type] = Networks[tlib2.tube_type] or {}
-	Networks[tlib2.tube_type][netID] = netw
-	netw.alive = 3
-	-- sort generating1 nodes, so that regenerative ones will be used first
-	if netw.gen1 then
-		table.sort(netw.gen1, function(a,b) return a.regenerative and not b.regenerative end)
-	end
-	techage.schedule.start(tlib2.tube_type, netID)
-end
-	
-function techage.networks.get_network(tube_type, netID)
-	--print("get_network", string.format("%X", netID), debug(tube_type))
-	local netw = Networks[tube_type] and Networks[tube_type][netID]
-	if netw then
-		netw.alive = 3 -- monitored by scheduler (power)
-		netw.best_before = minetest.get_gametime() + BEST_BEFORE  -- monitored by networks (liquids)
-		return netw
-	end
-end
-
-function techage.networks.delete_network(tube_type, netID)
-	if Networks[tube_type] and Networks[tube_type][netID] then
-		Networks[tube_type][netID] = nil
-	end
-end
-
--- Get node tubelib2 connections as table of outdirs
--- techage.networks.get_node_connections(pos, net_name)
-techage.networks.get_node_connections = get_node_connections
-
-techage.networks.MAX_NUM_NODES = MAX_NUM_NODES

techage/basis/node_states.lua

@@ -158,7 +158,9 @@ function techage.needs_power(nvm)
 	return state == RUNNING or state == NOPOWER
 end
 
+-- consumes power
 function techage.needs_power2(state)
+	state = state or STOPPED
 	return state == RUNNING or state == NOPOWER
 end
 

techage/carts/chest_cart.lua

@@ -19,6 +19,16 @@ local P2S = function(pos) if pos then return minetest.pos_to_string(pos) end end
 local S2P = minetest.string_to_pos
 local MP = minetest.get_modpath("minecart")
 
+local Tube = techage.Tube
+
+local function on_rightclick(pos, node, clicker)
+	if clicker and clicker:is_player() then
+		if M(pos):get_int("userID") == 0 then
+			minecart.show_formspec(pos, clicker)
+		end
+	end
+end
+
 local function formspec()
 	return "size[8,6]"..
 	default.gui_bg..
@@ -78,6 +88,7 @@ minetest.register_node("techage:chest_cart", {
 	on_punch = minecart.on_nodecart_punch,
 	allow_metadata_inventory_put = allow_metadata_inventory_put,
 	allow_metadata_inventory_take = allow_metadata_inventory_take,
+	on_rightclick = on_rightclick,
 	
 	after_place_node = function(pos, placer)
 		local inv = M(pos):get_inventory()
@@ -150,6 +161,8 @@ techage.register_node({"techage:chest_cart"}, {
 	end,
 })	
 
+Tube:set_valid_sides("techage:chest_cart", {"L", "R", "F", "B"})
+
 minetest.register_craft({
 	output = "techage:chest_cart",
 	recipe = {

techage/carts/tank_cart.lua

@@ -18,9 +18,9 @@ local S = techage.S
 local P2S = function(pos) if pos then return minetest.pos_to_string(pos) end end
 local S2P = minetest.string_to_pos
 local Pipe = techage.LiquidPipe
-local liquid = techage.liquid
 local MP = minetest.get_modpath("minecart")
 
+local liquid = networks.liquid 
 local CAPACITY = 100
 
 local function on_rightclick(pos, node, clicker)
@@ -30,7 +30,7 @@ local function on_rightclick(pos, node, clicker)
 		else
 			local nvm = techage.get_nvm(pos)
 			techage.set_activeformspec(pos, clicker)
-			M(pos):set_string("formspec", liquid.formspec(pos, nvm))
+			M(pos):set_string("formspec", techage.liquid.formspec(pos, nvm))
 			minetest.get_node_timer(pos):start(2)
 		end
 	end
@@ -39,50 +39,48 @@ end
 local function node_timer(pos, elapsed)
 	if techage.is_activeformspec(pos) then
 		local nvm = techage.get_nvm(pos)
-		M(pos):set_string("formspec", liquid.formspec(pos, nvm))
+		M(pos):set_string("formspec", techage.liquid.formspec(pos, nvm))
 		return true
 	end	
 	return false
 end
 
-local function take_liquid(pos, indir, name, amount)
+local function peek_liquid(pos)
-	amount, name = liquid.srv_take(pos, indir, name, amount)
-	if techage.is_activeformspec(pos) then
 	local nvm = techage.get_nvm(pos)
-		M(pos):set_string("formspec", liquid.formspec(pos, nvm))
+	return liquid.srv_peek(nvm)
-	end
-	return amount, name
 end
 
-local function untake_liquid(pos, indir, name, amount)
+local function take_liquid(pos, indir, name, amount)
-	local leftover = liquid.srv_put(pos, indir, name, amount)
-	if techage.is_activeformspec(pos) then
 	local nvm = techage.get_nvm(pos)
-		M(pos):set_string("formspec", liquid.formspec(pos, nvm))
+	amount, name = liquid.srv_take(nvm, name, amount)
+	if techage.is_activeformspec(pos) then
+		M(pos):set_string("formspec", techage.liquid.formspec(pos, nvm))
 	end
-	return leftover
+	return amount, name
 end
 	
 local function put_liquid(pos, indir, name, amount)
 	-- check if it is not powder
 	local ndef = minetest.registered_craftitems[name] or {}
 	if not ndef.groups or ndef.groups.powder ~= 1 then
-		local leftover = liquid.srv_put(pos, indir, name, amount)
-		if techage.is_activeformspec(pos) then
 		local nvm = techage.get_nvm(pos)
-			M(pos):set_string("formspec", liquid.formspec(pos, nvm))
+		local leftover = liquid.srv_put(nvm, name, amount, CAPACITY)
+		if techage.is_activeformspec(pos) then
+			M(pos):set_string("formspec", techage.liquid.formspec(pos, nvm))
 		end
 		return leftover
 	end
 	return amount
 end
 
-local networks_def = {
+local function untake_liquid(pos, indir, name, amount)
-	pipe2 = {
+	local nvm = techage.get_nvm(pos)
-		sides = {U = 1}, -- Pipe connection side
+	local leftover = liquid.srv_put(nvm, name, amount, CAPACITY)
-		ntype = "tank",
+	if techage.is_activeformspec(pos) then
-	},
+		M(pos):set_string("formspec", techage.liquid.formspec(pos, nvm))
-}
+	end
+	return leftover
+end
 
 minetest.register_node("techage:tank_cart", {
 	description = S("TA Tank Cart"),
@@ -119,6 +117,7 @@ minetest.register_node("techage:tank_cart", {
 	after_place_node = function(pos)
 		local nvm = techage.get_nvm(pos)
 		nvm.liquid = nvm.liquid or {}
+		M(pos):set_string("formspec", techage.liquid.formspec(pos, nvm))
 	end,
 	
 	set_cargo = function(pos, data)
@@ -134,26 +133,24 @@ minetest.register_node("techage:tank_cart", {
 	end,
 	
 	has_cargo = function(pos)
-		return not liquid.is_empty(pos)
+		return not techage.liquid.is_empty(pos)
 	end,
 	
 	on_timer = node_timer,
-	
-	liquid = {
-		capa = CAPACITY,
-		peek = liquid.srv_peek,
-		put = put_liquid,
-		take = take_liquid,
-		untake = untake_liquid,
-	},
-	networks = networks_def,
 	on_rightclick = on_rightclick,
 })
 
-techage.register_node({"techage:tank_cart"}, liquid.recv_message)	
+techage.register_node({"techage:tank_cart"}, techage.liquid.recv_message)	
-
-Pipe:add_secondary_node_names({"techage:tank_cart"})
 
+liquid.register_nodes({"techage:tank_cart"},
+	Pipe, "tank", {"U"}, {
+		capa = CAPACITY,
+		peek = peek_liquid,
+		put = put_liquid,
+		take = take_liquid,
+		untake = untake_liquid,
+	}
+)
 
 minecart.register_cart_entity("techage:tank_cart_entity", "techage:tank_cart", "tank", {
 	initial_properties = {

techage/chemistry/ta4_doser.lua

@@ -3,7 +3,7 @@
 	TechAge
 	=======
 
-	Copyright (C) 2019-2020 Joachim Stolberg
+	Copyright (C) 2019-2021 Joachim Stolberg
 
 	AGPL v3
 	See LICENSE.txt for more information
@@ -17,8 +17,7 @@ local P2S = minetest.pos_to_string
 local M = minetest.get_meta
 local S = techage.S
 local Pipe = techage.LiquidPipe
-local networks = techage.networks
+local liquid = networks.liquid
-local liquid = techage.liquid
 local recipes = techage.recipes
 
 local Liquids = {}  -- {hash(pos) = {name = outdir},...}
@@ -27,26 +26,6 @@ local STANDBY_TICKS = 2
 local COUNTDOWN_TICKS = 3
 local CYCLE_TIME = 10
 
--- to mark the pump source and destinstion node
-local DebugCache = {}
-
-local function set_starter_name(pos, clicker)
-	local key = minetest.hash_node_position(pos)
-	DebugCache[key] = {starter = clicker:get_player_name(), count = 10}
-end
-
-local function get_starter_name(pos)
-	local key = minetest.hash_node_position(pos)
-	local def = DebugCache[key]
-	if def then
-		def.count = (def.count or 0) - 1
-		if def.count > 0 then
-			return def.starter
-		end
-		DebugCache[key] = nil
-	end
-end
-
 local function formspec(self, pos, nvm)
 	return "size[6,3.6]"..
 		default.gui_bg..
@@ -67,7 +46,7 @@ local function get_liquids(pos)
 	-- determine the available input liquids
 	local tbl = {}
 	for outdir = 1,4 do
-		local name, num = liquid.peek(pos, outdir)
+		local name, num = liquid.peek(pos, Pipe, outdir)
 		if name then
 			tbl[name] = outdir
 		end
@@ -87,7 +66,7 @@ local function reload_liquids(pos)
 	-- determine the available input liquids
 	local tbl = {}
 	for outdir = 1,4 do
-		local name, num = liquid.peek(pos, outdir)
+		local name, num = liquid.peek(pos, Pipe, outdir)
 		if name then
 			tbl[name] = outdir
 		end
@@ -155,7 +134,7 @@ local State = techage.NodeStates:new({
 
 local function untake(pos, taken)
 	for _,item in pairs(taken) do
-		liquid.untake(pos, item.outdir, item.name, item.num)
+		liquid.untake(pos, Pipe, item.outdir, item.name, item.num)
 	end
 end	
 
@@ -198,9 +177,37 @@ local function dosing(pos, nvm, elapsed)
 			end
 		end
 	end
+	
+	-- check leftover
+	local leftover
+	local mem = techage.get_mem(pos)
+	if mem.waste_leftover then
+		leftover = reactor_cmnd(pos, "waste", {
+				name = mem.waste_leftover.name, 
+				amount = mem.waste_leftover.num}) or mem.waste_leftover.num
+		if leftover > 0 then
+			mem.waste_leftover.num = leftover
+			State:blocked(pos, nvm)
+			return
+		end
+		mem.waste_leftover = nil
+	end
+	if mem.output_leftover then
+		leftover = reactor_cmnd(pos, "output", {
+				name = mem.output_leftover.name, 
+				amount = mem.output_leftover.num}) or mem.output_leftover.num
+		if leftover > 0 then
+			mem.output_leftover.num = leftover
+			State:blocked(pos, nvm)
+			return
+		end
+		mem.output_leftover = nil
+	end
+	
 	-- inputs
-	local starter = get_starter_name(pos)
 	local taken = {}
+	mem.dbg_cycles = (mem.dbg_cycles or 0) - 1
+	
 	for _,item in pairs(recipe.input) do
 		if item.name ~= "" then
 			local outdir = liquids[item.name] or reload_liquids(pos)[item.name]
@@ -210,7 +217,7 @@ local function dosing(pos, nvm, elapsed)
 				untake(pos, taken)
 				return
 			end
-			local num = liquid.take(pos, outdir, item.name, item.num, starter)
+			local num = liquid.take(pos, Pipe, outdir, item.name, item.num, mem.dbg_cycles > 0)
 			if num < item.num then
 				taken[#taken + 1] = {outdir = outdir, name = item.name, num = num}
 				State:standby(pos, nvm)
@@ -222,13 +229,13 @@ local function dosing(pos, nvm, elapsed)
 		end
 	end
 	-- waste
-	local leftover
 	if recipe.waste.name ~= "" then
 		leftover = reactor_cmnd(pos, "waste", {
 				name = recipe.waste.name, 
-				amount = recipe.waste.num})
+				amount = recipe.waste.num}) or recipe.waste.num
-		if not leftover or (tonumber(leftover) or 1) > 0 then
+		if leftover > 0 then
-			untake(pos, taken)
+			mem.waste_leftover = {name = recipe.waste.name, num = leftover}
+			mem.output_leftover = {name = recipe.output.name, num = recipe.output.num}
 			State:blocked(pos, nvm)
 			reactor_cmnd(pos, "stop")
 			return
@@ -237,9 +244,9 @@ local function dosing(pos, nvm, elapsed)
 	-- output
 	leftover = reactor_cmnd(pos, "output", {
 			name = recipe.output.name, 
-			amount = recipe.output.num})
+			amount = recipe.output.num}) or recipe.output.num
-	if not leftover or (tonumber(leftover) or 1) > 0 then
+	if leftover > 0 then
-		untake(pos, taken)
+		mem.output_leftover = {name = recipe.output.name, num = leftover}
 		State:blocked(pos, nvm)
 		reactor_cmnd(pos, "stop")
 		return
@@ -267,19 +274,12 @@ local function on_receive_fields(pos, formname, fields, player)
 	if not nvm.running then	
 		recipes.on_receive_fields(pos, formname, fields, player)
 	end
-	set_starter_name(pos, player)
+	local mem = techage.get_mem(pos)
+	mem.dbg_cycles = 5
 	State:state_button_event(pos, nvm, fields)
 	M(pos):set_string("formspec", formspec(State, pos, nvm))
 end
 
-local nworks = {
-	pipe2 = {
-		sides = techage.networks.AllSides, -- Pipe connection sides
-		ntype = "pump",
-	},
-}
-
-
 minetest.register_node("techage:ta4_doser", {
 	description = S("TA4 Doser"),
 	tiles = {
@@ -301,19 +301,17 @@ minetest.register_node("techage:ta4_doser", {
 		Pipe:after_place_node(pos)
 	end,
 	tubelib2_on_update2 = function(pos, dir, tlib2, node)
-		liquid.update_network(pos, dir)
+		liquid.update_network(pos, dir, tlib2, node)
 		del_liquids(pos)
 	end,
 	after_dig_node = function(pos, oldnode, oldmetadata, digger)
 		techage.remove_node(pos, oldnode, oldmetadata)
 		Pipe:after_dig_node(pos)
-		liquid.after_dig_pump(pos)
 		techage.del_mem(pos)
 	end,
 	on_receive_fields = on_receive_fields,
 	on_rightclick = on_rightclick,
 	on_timer = node_timer,
-	networks = nworks,
 
 	paramtype2 = "facedir",
 	on_rotate = screwdriver.disallow,
@@ -341,13 +339,12 @@ minetest.register_node("techage:ta4_doser_on", {
 	},
 
 	tubelib2_on_update2 = function(pos, dir, tlib2, node)
-		liquid.update_network(pos, dir)
+		liquid.update_network(pos, dir, tlib2, node)
 		del_liquids(pos)
 	end,
 	on_receive_fields = on_receive_fields,
 	on_rightclick = on_rightclick,
 	on_timer = node_timer,
-	networks = nworks,
 	
 	paramtype2 = "facedir",
 	on_rotate = screwdriver.disallow,
@@ -357,15 +354,14 @@ minetest.register_node("techage:ta4_doser_on", {
 	sounds = default.node_sound_metal_defaults(),
 })
 
+liquid.register_nodes({"techage:ta4_doser", "techage:ta4_doser_on"}, Pipe, "pump", nil, {})
+
 techage.register_node({"techage:ta4_doser", "techage:ta4_doser_on"}, {
 	on_recv_message = function(pos, src, topic, payload)
 		return State:on_receive_message(pos, topic, payload)
 	end,
 })
 
-Pipe:add_secondary_node_names({"techage:ta4_doser", "techage:ta4_doser_on"})
-
-
 if minetest.global_exists("unified_inventory") then
 	unified_inventory.register_craft_type("ta4_doser", {
 		description = S("TA4 Reactor"),

techage/chemistry/ta4_liquid_filter.lua

@@ -17,10 +17,9 @@
 -- If necessary, this can be adjusted later.
 
 local M = minetest.get_meta
-local networks = techage.networks
 local S = techage.S
 local Pipe = techage.LiquidPipe
-local liquid = techage.liquid
+local liquid = networks.liquid
 
 -- Checks if the filter structure is ok and returns the amount of gravel
 local function checkStructure(pos)
@@ -100,12 +99,8 @@ minetest.register_node("techage:ta4_liquid_filter_filler", {
 	after_place_node = function(pos)
 		Pipe:after_place_node(pos)
 	end,
-	tubelib2_on_update2 = function(pos, dir, tlib2, node)
-		liquid.update_network(pos)
-	end,
 	after_dig_node = function(pos, oldnode, oldmetadata, digger)
 		Pipe:after_dig_node(pos)
-		liquid.after_dig_pump(pos)
 		techage.del_mem(pos)
 	end,
 
@@ -116,9 +111,10 @@ minetest.register_node("techage:ta4_liquid_filter_filler", {
 	groups = {cracky=2},
 	is_ground_content = false,
 	sounds = default.node_sound_metal_defaults(),
+})
 
-
+liquid.register_nodes({"techage:ta4_liquid_filter_filler"},
-	liquid = {
+	Pipe, "tank", {"U"}, {
 		capa = 1,
 		peek = function(...) return nil end,
 		put = function(pos, indir, name, amount)
@@ -134,7 +130,7 @@ minetest.register_node("techage:ta4_liquid_filter_filler", {
 			end
 			if math.random() < 0.5 then
 				local out_pos = {x=pos.x,y=pos.y-8,z=pos.z}
-				local leftover = liquid.put(out_pos, networks.side_to_outdir(out_pos, "R"), "techage:lye", 1)
+				local leftover = liquid.put(out_pos, Pipe, networks.side_to_outdir(out_pos, "R"), "techage:lye", 1)
 				if leftover > 0 then
 					return amount
 				end
@@ -147,15 +143,9 @@ minetest.register_node("techage:ta4_liquid_filter_filler", {
 		untake = function(pos, outdir, name, amount, player_name)
 			return amount
 		end,
-	},
+	}
+)
 
-	networks = {
-		pipe2 = {
-			sides = {U = 1}, -- Pipe connection sides
-			ntype = "tank",
-		},
-	},
-})
 
 minetest.register_node("techage:ta4_liquid_filter_sink", {
 	description = S("TA4 Liquid Filter Sink"),
@@ -182,9 +172,6 @@ minetest.register_node("techage:ta4_liquid_filter_sink", {
 	after_place_node = function(pos)
 		Pipe:after_place_node(pos)
 	end,
-	tubelib2_on_update2 = function(pos, dir, tlib2, node)
-		liquid.update_network(pos)
-	end,
 	after_dig_node = function(pos, oldnode, oldmetadata, digger)
 		Pipe:after_dig_node(pos)
 	end,
@@ -196,16 +183,12 @@ minetest.register_node("techage:ta4_liquid_filter_sink", {
 	groups = {cracky=2},
 	is_ground_content = false,
 	sounds = default.node_sound_metal_defaults(),
-
-	networks = {
-		pipe2 = {
-			sides = {R = 1}, -- Pipe connection sides
-			ntype = "pump",
-		},
-	},
 })
 
-Pipe:add_secondary_node_names({"techage:ta4_liquid_filter_filler", "techage:ta4_liquid_filter_sink"})
+liquid.register_nodes({"techage:ta4_liquid_filter_sink"},
+	Pipe, "pump", {"R"}, {}
+)
+
 
 minetest.register_craft({
 	output = 'techage:ta4_liquid_filter_filler',

techage/chemistry/ta4_reactor.lua

@@ -15,8 +15,8 @@
 local S = techage.S
 local M = minetest.get_meta
 local Pipe = techage.LiquidPipe
-local networks = techage.networks
+local Cable = techage.ElectricCable
-local liquid = techage.liquid
+local liquid = networks.liquid
 
 minetest.register_node("techage:ta4_reactor_fillerpipe", {
 	description = S("TA4 Reactor Filler Pipe"),
@@ -48,9 +48,6 @@ minetest.register_node("techage:ta4_reactor_fillerpipe", {
 			Pipe:after_place_node(pos1)
 		end
 	end,
-	tubelib2_on_update2 = function(pos, dir, tlib2, node)
-		liquid.update_network(pos)
-	end,
 	after_dig_node = function(pos, oldnode, oldmetadata, digger)
 		Pipe:after_dig_node(pos)
 	end,
@@ -63,13 +60,6 @@ minetest.register_node("techage:ta4_reactor_fillerpipe", {
 	groups = {cracky=2},
 	is_ground_content = false,
 	sounds = default.node_sound_metal_defaults(),
-
-	networks = {
-		pipe2 = {
-			sides = {U = 1}, -- Pipe connection sides
-			ntype = "tank",
-		},
-	},
 })
 
 local function stand_cmnd(pos, cmnd, payload)
@@ -85,7 +75,7 @@ end
 local function base_waste(pos, payload)
 	local pos2 = {x = pos.x, y = pos.y-3, z = pos.z}
 	local outdir = M(pos2):get_int("outdir")
-	return liquid.put(pos2, outdir, payload.name, payload.amount, payload.player_name)
+	return liquid.put(pos2, Pipe, outdir, payload.name, payload.amount, payload.player_name)
 end
 
 -- controlled by the doser
@@ -117,6 +107,8 @@ techage.register_node({"techage:ta4_reactor_fillerpipe"}, {
 	end,
 })
 
+liquid.register_nodes({"techage:ta4_reactor_fillerpipe"}, Pipe, "tank", {"U"}, {})
+
 local function formspec()
 	local title = S("TA4 Reactor")
 	return "size[8,6]"..
@@ -176,8 +168,6 @@ minetest.register_node("techage:ta4_reactor", {
 	sounds = default.node_sound_metal_defaults(),
 })
 
-Pipe:add_secondary_node_names({"techage:ta4_reactor_fillerpipe"})
-
 minetest.register_craft({
 	output = 'techage:ta4_reactor',
 	recipe = {

techage/chemistry/ta4_stand.lua

@@ -3,7 +3,7 @@
 	TechAge
 	=======
 
-	Copyright (C) 2019-2020 Joachim Stolberg
+	Copyright (C) 2019-2021 Joachim Stolberg
 
 	AGPL v3
 	See LICENSE.txt for more information
@@ -15,13 +15,12 @@
 local S = techage.S
 local M = minetest.get_meta
 local Cable = techage.ElectricCable
-local power = techage.power
 local Pipe = techage.LiquidPipe
-local networks = techage.networks
+local power = networks.power
-local liquid = techage.liquid
+local liquid = networks.liquid
 
 local PWR_NEEDED = 8
-local CYCLE_TIME = 4
+local CYCLE_TIME = 2
 
 local function play_sound(pos)
 	local mem = techage.get_mem(pos)
@@ -49,18 +48,18 @@ local function on_power(pos)
 	M(pos):set_string("infotext", S("on"))
 	play_sound(pos)
 	local nvm = techage.get_nvm(pos)
-	nvm.has_power = true
+	nvm.running = true
 end
 
 local function on_nopower(pos)
 	M(pos):set_string("infotext", S("no power"))
 	stop_sound(pos)
 	local nvm = techage.get_nvm(pos)
-	nvm.has_power = false
+	nvm.running = false
 end
 
 local function is_running(pos, nvm) 
-	return nvm.has_power 
+	return nvm.running 
 end
 
 minetest.register_node("techage:ta4_reactor_stand", {
@@ -103,21 +102,19 @@ minetest.register_node("techage:ta4_reactor_stand", {
 		Pipe:after_place_node(pos)
 		Cable:after_place_node(pos)
 	end,
-	tubelib2_on_update2 = function(pos, dir, tlib2, node)
-		if tlib2.tube_type == "ele1" then
-			power.update_network(pos, dir, tlib2)
-		else
-			liquid.update_network(pos, dir, tlib2)
-		end
-	end,
 	on_timer = function(pos, elapsed)
-		power.consumer_alive(pos, Cable, CYCLE_TIME)
+		local nvm = techage.get_nvm(pos)
+		local consumed = power.consume_power(pos, Cable, nil, PWR_NEEDED)
+		if not nvm.running and consumed == PWR_NEEDED then
+			on_power(pos)
+		elseif nvm.running and consumed < PWR_NEEDED then
+			on_nopower(pos)
+		end
 		return true
 	end,
 	after_dig_node = function(pos, oldnode)
 		Pipe:after_dig_node(pos)
 		Cable:after_dig_node(pos)
-		liquid.after_dig_pump(pos)
 		techage.del_mem(pos)
 	end,
 	
@@ -128,21 +125,6 @@ minetest.register_node("techage:ta4_reactor_stand", {
 	groups = {cracky=2},
 	is_ground_content = false,
 	sounds = default.node_sound_metal_defaults(),
-
-	networks = {
-		pipe2 = {
-			sides = {R=1}, 
-			ntype = "pump",
-		},
-		ele1 = {
-			sides = {L=1},
-			ntype = "con1",
-			on_power = on_power,
-			on_nopower = on_nopower,
-			nominal = PWR_NEEDED,
-			is_running = is_running,
-		},
-	},
 })
 
 -- controlled by the fillerpipe
@@ -150,21 +132,19 @@ techage.register_node({"techage:ta4_reactor_stand"}, {
 	on_transfer = function(pos, in_dir, topic, payload)
 		local nvm = techage.get_nvm(pos)
 		if topic == "power" then
-			return nvm.has_power or power.power_available(pos, Cable)
+			return nvm.running or power.power_available(pos, Cable)
 		elseif topic == "output" then
 			local outdir = M(pos):get_int("outdir")
-			return liquid.put(pos, outdir, payload.name, payload.amount, payload.player_name)
+			return liquid.put(pos, Pipe, outdir, payload.name, payload.amount, payload.player_name)
 		elseif topic == "can_start" then
 			return power.power_available(pos, Cable)
 		elseif topic == "start" then
-			nvm.has_power = false
+			nvm.running = false
-			power.consumer_start(pos, Cable, CYCLE_TIME)
 			minetest.get_node_timer(pos):start(CYCLE_TIME)
 			M(pos):set_string("infotext", "...")
 			return true
 		elseif topic == "stop" then
 			nvm.has_power = false
-			power.consumer_stop(pos, Cable)
 			stop_sound(pos)
 			minetest.get_node_timer(pos):stop()
 			M(pos):set_string("infotext", S("off"))
@@ -195,9 +175,6 @@ minetest.register_node("techage:ta4_reactor_base", {
 		M(pos):set_int("outdir", networks.side_to_outdir(pos, "R"))
 		Pipe:after_place_node(pos)
 	end,
-	tubelib2_on_update2 = function(pos, dir, tlib2, node)
-		liquid.update_network(pos, dir, tlib2)
-	end,
 	after_dig_node = function(pos, oldnode, oldmetadata, digger)
 		Pipe:after_dig_node(pos)
 	end,
@@ -207,21 +184,11 @@ minetest.register_node("techage:ta4_reactor_base", {
 	groups = {cracky=2},
 	is_ground_content = false,
 	sounds = default.node_sound_stone_defaults(),
-
-	networks = {
-		pipe2 = {
-			sides = {R=1}, -- Pipe connection sides
-			ntype = "pump",
-		},
-	},
 })
 
-Pipe:add_secondary_node_names({
+liquid.register_nodes({"techage:ta4_reactor_base"}, Pipe, "pump", {"R"}, {})
-		"techage:ta4_reactor_base", 
+liquid.register_nodes({"techage:ta4_reactor_stand"}, Pipe, "pump", {"R"}, {})
-		"techage:ta4_reactor_stand",
+power.register_nodes({"techage:ta4_reactor_stand"}, Cable, "con", {"L"})
-})
-
-Cable:add_secondary_node_names({"techage:ta4_reactor_stand"})
 
 minetest.register_craft({
 	output = 'techage:ta4_reactor_stand',

techage/coal_power_station/generator.lua

@@ -3,7 +3,7 @@
 	TechAge
 	=======
 
-	Copyright (C) 2019-2020 Joachim Stolberg
+	Copyright (C) 2019-2021 Joachim Stolberg
 
 	AGPL v3
 	See LICENSE.txt for more information
@@ -16,25 +16,17 @@
 local M = minetest.get_meta
 local S = techage.S
 
+local Cable = techage.ElectricCable
+local power = networks.power
+local control = networks.control
+
+local CYCLE_TIME = 2
 local STANDBY_TICKS = 4
 local COUNTDOWN_TICKS = 4
-local CYCLE_TIME = 2
+local PWR_PERF = 80
-local PWR_CAPA = 80
-
-local Cable = techage.ElectricCable
-local power = techage.power
-local networks = techage.networks
 
 local function formspec(self, pos, nvm)
-	return "size[4,4]"..
+	return techage.generator_formspec(self, pos, nvm, S("Generator"), nvm.provided, PWR_PERF)
-		"box[0,-0.1;3.8,0.5;#c6e8ff]"..
-		"label[1,-0.1;"..minetest.colorize( "#000000", S("Generator")).."]"..
-		default.gui_bg..
-		default.gui_bg_img..
-		default.gui_slots..
-		power.formspec_label_bar(pos, 0, 0.8, S("power"), PWR_CAPA, nvm.provided)..
-		"image_button[2.8,2;1,1;".. self:get_state_button_image(nvm) ..";state_button;]"..
-		"tooltip[2.8,2;1,1;"..self:get_state_tooltip(nvm).."]"
 end
 
 local function transfer_turbine(pos, topic, payload)
@@ -46,19 +38,25 @@ local function can_start(pos, nvm, state)
 	return (nvm.firebox_trigger or 0) > 0 -- by means of firebox
 end
 
+local function has_fire(nvm)
+	nvm.firebox_trigger = (nvm.firebox_trigger or 0) - 1
+	return nvm.firebox_trigger > 0
+end
+
 local function start_node(pos, nvm, state)
-	local outdir = M(pos):get_int("outdir")
+	local meta = M(pos)
-	power.generator_start(pos, Cable, CYCLE_TIME, outdir)
+	nvm.provided = 0
+	local outdir = meta:get_int("outdir")
 	transfer_turbine(pos, "start")
-	nvm.running = true
+	power.start_storage_calc(pos, Cable, outdir)
+	techage.evaluate_charge_termination(nvm, meta)
 end
 
 local function stop_node(pos, nvm, state)
-	local outdir = M(pos):get_int("outdir")
-	power.generator_stop(pos, Cable, outdir)
 	nvm.provided = 0
+	local outdir = M(pos):get_int("outdir")
 	transfer_turbine(pos, "stop")
-	nvm.running = false
+	power.start_storage_calc(pos, Cable, outdir)
 end
 
 local State = techage.NodeStates:new({
@@ -75,14 +73,24 @@ local State = techage.NodeStates:new({
 
 local function node_timer(pos, elapsed)
 	local nvm = techage.get_nvm(pos)
-	nvm.firebox_trigger = (nvm.firebox_trigger or 0) - 1
+	local running = techage.is_running(nvm)
-	if nvm.firebox_trigger <= 0 then
+	local fire = has_fire(nvm)
-		State:nopower(pos, nvm)
+	if running and not fire then
+		State:standby(pos, nvm)
 		stop_node(pos, nvm, State)
-		transfer_turbine(pos, "stop")	
+	elseif not running and fire then
-	else
+		State:start(pos, nvm)
-		local outdir = M(pos):get_int("outdir")
+		-- start_node() is called implicit
-		nvm.provided = power.generator_alive(pos, Cable, CYCLE_TIME, outdir)
+	elseif running then
+		local meta = M(pos)
+		local outdir = meta:get_int("outdir")
+		local tp1 = tonumber(meta:get_string("termpoint1"))
+		local tp2 = tonumber(meta:get_string("termpoint2"))
+		nvm.provided = power.provide_power(pos, Cable, outdir, PWR_PERF, tp1, tp2)
+		local val = power.get_storage_load(pos, Cable, outdir, PWR_PERF)
+		if val > 0 then
+			nvm.load = val
+		end
 		State:keep_running(pos, nvm, COUNTDOWN_TICKS)
 	end
 	if techage.is_activeformspec(pos) then
@@ -119,18 +127,13 @@ local function after_dig_node(pos, oldnode)
 	techage.del_mem(pos)
 end
 
-local function tubelib2_on_update2(pos, outdir, tlib2, node) 
+local function get_generator_data(pos, outdir, tlib2)
-	power.update_network(pos, outdir, tlib2)
+	local nvm = techage.get_nvm(pos)
+	if techage.is_running(nvm) then
+		return {level = (nvm.load or 0) / PWR_PERF, perf = PWR_PERF, capa = PWR_PERF * 2}
+	end
 end
 
-local net_def = {
-	ele1 = {
-		sides = {R = 1},
-		ntype = "gen1",
-		nominal = PWR_CAPA,
-	},
-}
-
 minetest.register_node("techage:generator", {
 	description = S("TA3 Generator"),
 	tiles = {
@@ -148,8 +151,8 @@ minetest.register_node("techage:generator", {
 	on_timer = node_timer,
 	after_place_node = after_place_node,
 	after_dig_node = after_dig_node,
-	tubelib2_on_update2 = tubelib2_on_update2,
+	get_generator_data = get_generator_data,
-	networks = net_def,
+	ta3_formspec = techage.generator_settings("ta3", PWR_PERF),
 
 	paramtype2 = "facedir",
 	groups = {cracky=2, crumbly=2, choppy=2},
@@ -193,8 +196,8 @@ minetest.register_node("techage:generator_on", {
 	on_timer = node_timer,
 	after_place_node = after_place_node,
 	after_dig_node = after_dig_node,
-	tubelib2_on_update2 = tubelib2_on_update2,
+	get_generator_data = get_generator_data,
-	networks = net_def,
+	ta3_formspec = techage.generator_settings("ta3", PWR_PERF),
 
 	drop = "",
 	paramtype2 = "facedir",
@@ -205,7 +208,7 @@ minetest.register_node("techage:generator_on", {
 	sounds = default.node_sound_wood_defaults(),
 })
 
-Cable:add_secondary_node_names({"techage:generator", "techage:generator_on"})
+power.register_nodes({"techage:generator", "techage:generator_on"}, Cable, "gen", {"R"})
 
 -- controlled by the turbine
 techage.register_node({"techage:generator", "techage:generator_on"}, {
@@ -213,8 +216,8 @@ techage.register_node({"techage:generator", "techage:generator_on"}, {
 		local nvm = techage.get_nvm(pos)
 		if topic == "trigger" then
 			nvm.firebox_trigger = 3
-			if nvm.running then
+			if techage.is_running(nvm) then
-				return math.max((nvm.provided or PWR_CAPA) / PWR_CAPA, 0.02)
+				return math.max((nvm.provided or PWR_PERF) / PWR_PERF, 0.02)
 			else
 				return 0
 			end
@@ -230,6 +233,28 @@ techage.register_node({"techage:generator", "techage:generator_on"}, {
 	end,
 })
 
+-- used by power terminal
+control.register_nodes({"techage:generator", "techage:generator_on"}, {
+		on_receive = function(pos, tlib2, topic, payload)
+		end,
+		on_request = function(pos, tlib2, topic)
+			if topic == "info" then
+				local nvm = techage.get_nvm(pos)
+				local meta = M(pos)
+				return {
+					type = S("TA3 Generator"),
+					number = meta:get_string("node_number") or "",
+					running = techage.is_running(nvm) or false,
+					available = PWR_PERF,
+					provided = nvm.provided or 0,
+					termpoint = meta:get_string("termpoint"), 
+				}
+			end
+			return false
+		end,
+	}
+)
+
 minetest.register_craft({
 	output = "techage:generator",
 	recipe = {

techage/coal_power_station/oilfirebox.lua

@@ -3,7 +3,7 @@
 	TechAge
 	=======
 
-	Copyright (C) 2019-2020 Joachim Stolberg
+	Copyright (C) 2019-2021 Joachim Stolberg
 
 	AGPL v3
 	See LICENSE.txt for more information
@@ -20,7 +20,7 @@ local S = techage.S
 local firebox = techage.firebox
 local fuel = techage.fuel
 local Pipe = techage.LiquidPipe
-local liquid = techage.liquid
+local liquid = networks.liquid
 
 local CYCLE_TIME = 2
 local BURN_CYCLE_FACTOR = 0.5
@@ -115,44 +115,10 @@ minetest.register_node("techage:oilfirebox", {
 			minetest.after(1, start_firebox, pos, nvm)
 		end
 	end,
-	
-	liquid = {
-		capa = fuel.CAPACITY,
-		fuel_cat = fuel.BT_BITUMEN,
-		peek = liquid.srv_peek,
-		put = function(pos, indir, name, amount)
-			if fuel.valid_fuel(name, fuel.BT_BITUMEN) then
-				local leftover = liquid.srv_put(pos, indir, name, amount)
-				local nvm = techage.get_nvm(pos)
-				nvm.liquid = nvm.liquid or {}
-				nvm.liquid.amount = nvm.liquid.amount or 0
-				start_firebox(pos, nvm)
-				if techage.is_activeformspec(pos) then
-					local nvm = techage.get_nvm(pos)
-					M(pos):set_string("formspec", fuel.formspec(nvm))
-				end
-				return leftover
-			end
-			return amount
-		end,
-		take = function(pos, indir, name, amount)
-			amount, name = liquid.srv_take(pos, indir, name, amount)
-			if techage.is_activeformspec(pos) then
-				local nvm = techage.get_nvm(pos)
-				M(pos):set_string("formspec", fuel.formspec(nvm))
-			end
-			return amount, name
-		end
-	},
-	networks = {
-		pipe2 = {
-			sides = techage.networks.AllSides, -- Pipe connection sides
-			ntype = "tank",
-		},
-	},
 })
 
-Pipe:add_secondary_node_names({"techage:oilfirebox"})
+liquid.register_nodes({"techage:oilfirebox"},
+	Pipe, "tank", nil, fuel.get_liquid_table(fuel.BT_OIL, fuel.CAPACITY, start_firebox))
 
 
 techage.register_node({"techage:oilfirebox"}, {
@@ -161,7 +127,7 @@ techage.register_node({"techage:oilfirebox"}, {
 		if topic == "state" then
 			return nvm.running and "running" or "stopped"
 		elseif topic == "fuel" then
-			return techage.fuel.get_fuel_amount(nvm)
+			return fuel.get_fuel_amount(nvm)
 		else
 			return "unsupported"
 		end