Merge branch 'm_small_fixes' into 'master'

Various small fixes

See merge request VanessaE/pipeworks!35

README

@@ -1,7 +1,7 @@
 This mod uses nodeboxes to supply a complete set of 3D pipes and tubes, 
 along devices that work with them.
 
-See https://github.com/VanessaE/pipeworks/wiki/ for detailed information about usage of this mod.
+See https://gitlab.com/VanessaE/pipeworks/wikis/ for detailed information about usage of this mod.
 
 Unlike the previous version of this mod, these pipes are rounded, and when 
 placed, they'll automatically join together as needed.  Pipes can go vertically 

autocrafter.lua

@@ -1,3 +1,4 @@
+local S = minetest.get_translator("pipeworks")
 local autocrafterCache = {}  -- caches some recipe data to avoid to call the slow function minetest.get_craft_result() every second
 
 local craft_time = 1
@@ -16,7 +17,7 @@ end
 local function get_item_info(stack)
 	local name = stack:get_name()
 	local def = minetest.registered_items[name]
-	local description = def and def.description or "Unknown item"
+	local description = def and def.description or S("Unknown item")
 	return description, name
 end
 
@@ -46,7 +47,7 @@ local function autocraft(inventory, craft)
 	end
 	-- consume material
 	for itemname, number in pairs(consumption) do
-		for i = 1, number do -- We have to do that since remove_item does not work if count > stack_max
+		for _ = 1, number do -- We have to do that since remove_item does not work if count > stack_max
 			inventory:remove_item("src", ItemStack(itemname))
 		end
 	end
@@ -68,11 +69,11 @@ local function run_autocrafter(pos, elapsed)
 	local output_item = craft.output.item
 	-- only use crafts that have an actual result
 	if output_item:is_empty() then
-		meta:set_string("infotext", "unconfigured Autocrafter: unknown recipe")
+		meta:set_string("infotext", S("unconfigured Autocrafter: unknown recipe"))
 		return false
 	end
 
-	for step = 1, math.floor(elapsed/craft_time) do
+	for _ = 1, math.floor(elapsed/craft_time) do
 		local continue = autocraft(inventory, craft)
 		if not continue then return false end
 	end
@@ -101,11 +102,10 @@ local function after_recipe_change(pos, inventory)
 	if inventory:is_empty("recipe") then
 		minetest.get_node_timer(pos):stop()
 		autocrafterCache[minetest.hash_node_position(pos)] = nil
-		meta:set_string("infotext", "unconfigured Autocrafter")
+		meta:set_string("infotext", S("unconfigured Autocrafter"))
 		inventory:set_stack("output", 1, "")
 		return
 	end
-	local recipe_changed = false
 	local recipe = inventory:get_list("recipe")
 
 	local hash = minetest.hash_node_position(pos)
@@ -126,7 +126,7 @@ local function after_recipe_change(pos, inventory)
 	craft = craft or get_craft(pos, inventory, hash)
 	local output_item = craft.output.item
 	local description, name = get_item_info(output_item)
-	meta:set_string("infotext", string.format("'%s' Autocrafter (%s)", description, name))
+	meta:set_string("infotext", S("'@1' Autocrafter (@2)", description, name))
 	inventory:set_stack("output", 1, output_item)
 
 	after_inventory_change(pos)
@@ -190,8 +190,8 @@ local function update_meta(meta, enabled)
 			"listring[context;dst]" ..
 			"listring[current_player;main]"
 	if minetest.get_modpath("digilines") then
-		fs = fs.."field[1,3.5;4,1;channel;Channel;${channel}]"
-		fs = fs.."button_exit[5,3.2;2,1;save;Save]"
+		fs = fs.."field[1,3.5;4,1;channel;"..S("Channel")..";${channel}]"
+		fs = fs.."button_exit[5,3.2;2,1;save;"..S("Save").."]"
 	end
 	meta:set_string("formspec",fs)
 
@@ -200,13 +200,13 @@ local function update_meta(meta, enabled)
 	-- this might be more written code, but actually executes less
 	local output = meta:get_inventory():get_stack("output", 1)
 	if output:is_empty() then -- doesn't matter if paused or not
-		meta:set_string("infotext", "unconfigured Autocrafter")
+		meta:set_string("infotext", S("unconfigured Autocrafter"))
 		return false
 	end
 
 	local description, name = get_item_info(output)
-	local infotext = enabled and string.format("'%s' Autocrafter (%s)", description, name)
-				or string.format("paused '%s' Autocrafter", description)
+	local infotext = enabled and S("'@1' Autocrafter (@2)", description, name)
+				or S("paused '@1' Autocrafter", description)
 
 	meta:set_string("infotext", infotext)
 	return enabled
@@ -226,7 +226,7 @@ local function upgrade_autocrafter(pos, meta)
 		update_meta(meta, true)
 
 		if meta:get_string("virtual_items") == "1" then -- we are version 2
-			-- we allready dropped stuff, so lets remove the metadatasetting (we are not being called again for this node)
+			-- we already dropped stuff, so lets remove the metadatasetting (we are not being called again for this node)
 			meta:set_string("virtual_items", "")
 		else -- we are version 1
 			local recipe = inv:get_list("recipe")
@@ -248,7 +248,7 @@ local function upgrade_autocrafter(pos, meta)
 end
 
 minetest.register_node("pipeworks:autocrafter", {
-	description = "Autocrafter",
+	description = S("Autocrafter"),
 	drawtype = "normal",
 	tiles = {"pipeworks_autocrafter.png"},
 	groups = {snappy = 3, tubedevice = 1, tubedevice_receiver = 1},
@@ -388,6 +388,27 @@ minetest.register_node("pipeworks:autocrafter", {
 						end
 					end
 					after_recipe_change(pos,inv)
+				elseif msg == "get_recipe" then
+					local meta = minetest.get_meta(pos)
+					local inv = meta:get_inventory()
+					local recipe = {}
+					for y=0,2,1 do
+						local row = {}
+						for x=1,3,1 do
+							local slot = y*3+x
+							table.insert(row, inv:get_stack("recipe",slot):get_name())
+						end
+						table.insert(recipe, row)
+					end
+					local setchan = meta:get_string("channel")
+					local output = inv:get_stack("output", 1)
+					digiline:receptor_send(pos, digiline.rules.default, setchan, {
+						recipe = recipe,
+						result = {
+							name = output:get_name(),
+							count = output:get_count(),
+						}
+					  })
 				elseif msg == "off" then
 					update_meta(meta, false)
 					minetest.get_node_timer(pos):stop()
@@ -407,7 +428,7 @@ minetest.register_craft( {
 	output = "pipeworks:autocrafter 2",
 	recipe = {
 	        { "default:steel_ingot", "default:mese_crystal", "default:steel_ingot" },
-	        { "homedecor:plastic_sheeting", "default:steel_ingot", "homedecor:plastic_sheeting" },
+	        { "basic_materials:plastic_sheet", "default:steel_ingot", "basic_materials:plastic_sheet" },
 	        { "default:steel_ingot", "default:mese_crystal", "default:steel_ingot" }
 	},
 })

autodetect-finite-water.lua

@@ -0,0 +1,9 @@
+-- enable finite liquid in the presence of dynamic liquid to preserve water volume.
+local enable = false
+
+if minetest.get_modpath("dynamic_liquid") then
+	pipeworks.logger("detected mod dynamic_liquid, enabling finite liquid flag")
+	enable = true
+end
+
+pipeworks.toggles.finite_water = enable

autoplace_pipes.lua

@@ -159,6 +159,18 @@ function pipeworks.scan_pipe_surroundings(pos)
 		pzp = f or pzp
 	end
 
+-- ...straight-only pipe...
+
+	local match,a,b,c,d,e,f = pipeworks.get_axis_dir(nodetable, "pipeworks:straight_pipe")
+	if match then
+		pxm = a or pxm
+		pxp = b or pxp
+		pym = c or pym
+		pyp = d or pyp
+		pzm = e or pzm
+		pzp = f or pzp
+	end
+
 -- ... other nodes
 
 	local def_left   = minetest.registered_nodes[nxp.name] -- the node that {pos} is to the left of (not the

autoplace_tubes.lua

@@ -53,34 +53,35 @@ local function tube_autoroute(pos)
 	}
 	-- xm = 1, xp = 2, ym = 3, yp = 4, zm = 5, zp = 6
 
-	local positions = {}
-	local nodes = {}
-	for i, adj in ipairs(adjustments) do
-		positions[i] = vector.add(pos, adj)
-		nodes[i] = minetest.get_node(positions[i])
-	end
+	local adjlist = {} -- this will be used in item_transport
+
+	for i, adj in ipairs(adjustments) do
+		local position = vector.add(pos, adj)
+		local node = minetest.get_node(position)
 
-	for i, node in ipairs(nodes) do
 		local idef = minetest.registered_nodes[node.name]
 		-- handle the tubes themselves
 		if is_tube(node.name) then
 			active[i] = 1
+			table.insert(adjlist, adj)
 		-- handle new style connectors
 		elseif idef and idef.tube and idef.tube.connect_sides then
-			local dir = adjustments[i]
-			if idef.tube.connect_sides[nodeside(node, vector.multiply(dir, -1))] then
+			if idef.tube.connect_sides[nodeside(node, vector.multiply(adj, -1))] then
 				active[i] = 1
+				table.insert(adjlist, adj)
 			end
 		end
 	end
 
+	minetest.get_meta(pos):set_string("adjlist", minetest.serialize(adjlist))
+
 	-- all sides checked, now figure which tube to use.
 
 	local nodedef = minetest.registered_nodes[nctr.name]
 	local basename = nodedef.basename
 	if nodedef.style == "old" then
 		local nsurround = ""
-		for i, n in ipairs(active) do
+		for _, n in ipairs(active) do
 			nsurround = nsurround..n
 		end
 		nctr.name = basename.."_"..nsurround
@@ -111,6 +112,22 @@ function pipeworks.after_dig(pos)
 	pipeworks.scan_for_tube_objects(pos)
 end
 
+-- Screwdriver calls this function before rotating a node.
+-- However, connections must be updated *after* the node is rotated
+-- So, this function does the rotation itself and returns `true`.
+-- (Note: screwdriver already checks for protected areas.)
+
+-- This should only be used for tubes that don't autoconnect.
+-- (For example, one-way tubes.)
+-- Autoconnecting tubes will just revert back to their original state
+-- when they are updated.
+function pipeworks.on_rotate(pos, node, user, mode, new_param2)
+	node.param2 = new_param2
+	minetest.swap_node(pos, node)
+	pipeworks.scan_for_tube_objects(pos)
+	return true
+end
+
 if minetest.get_modpath("mesecons_mvps") then
 	mesecon.register_on_mvps_move(function(moved_nodes)
 		for _, n in ipairs(moved_nodes) do

changelog.txt

@@ -1,6 +1,55 @@
 Changelog
 ---------
 
+
+
+2017-10-19 (thetaepsilon)
+Directional flowables are now implemented.
+All devices for which it is relevant (valve, flow sensor etc.) have been converted so that they only flow on their connecting sides, so pressure propogation now works as expected for these devices when pressure logic is enabled.
+Classic mode continues to be preserved by default as before.
+
+
+
+2017-10-14 (thetaepsilon, VanessaE)
+Node breakers have been updated to not have a tool by default, and determine if the node that they are trying to break can be dug with the tool in it's inventory slot.
+The crafting recipe for the node breakers has been updated, using a new gear crafting item that requires iron instead of mese, which should be a more accessible cost in most cases.
+Existing node breakers in worlds will get their mese pick back if their slot is empty via LBM - the mese pick will show up in the inventory slot so you can reclaim your hard-earned mese crystals.
+Gear item texture and updated node breaker textures provided by VanessaE.
+
+
+
+2017-10-08 (thetaepsilon)
+A lot more of the new flow logic work.
+There are two sub-modes of this now,  non-finite and finite mode.
+Non-finite mode most closely resembles "classic mode", whereas finite mode is more intended for use with mods such as dynamic_liquids which enable water sources to move themselves.
+Everything that was functional in classic mode more or less works correctly now.
+Still TODO:
++ Flow directionality - things like flow sensors and airtight panels will flow in directions that don't make sense from their visuals.
+Possible feature requests:
++ Making tanks and gratings do something useful.
+
+
+
+2017-09-27 (thetaepsilon)
+Start of new flow logic re-implementation.
+This mode is current *very* incomplete, and requires a per-world setting to enable.
+Adds a pressure value stored in all pipe node metadata, and a mechanism to balance it out with nearby nodes on ABM trigger.
+Currently, this inhibits the old behaviour when enabled, and (again WHEN ENABLED) breaks pretty much everything but normal pipes, spigots and pumps.
+For this reason it is far from being intended as the default for some time to come yet.
+What *does* work:
++ Pumps will try to take in water (and removes it!) as long as internal pressure does not exceed a threshold.
+	- a TODO is to make this pressure threshold configurable.
++ Pipes will balance this pressure between themselves, and will slowly average out over time.
++ Spigots will try to make the node beneath them a water source if the pressure is great enough and the existing node is flowing water or air.
+	- This is admittedly of fairly limited use with default water mechanics; those looking for more realistic mechanics might want to look at the dynamic_liquid mod, though that mod comes with it's own caveats (most notably drastic changes to previous worlds...).
+What *does not* work:
++ Flow sensors, valves. Valves in particular currently do not function as a barrier to water's path under the experimental logic.
+	- TODO: internal code to allow this to be overriden.
+
+
+
+*seems this hasn't been updated in a while*
+
 2013-01-13: Tubes can transport items now! Namely, I added Novatux/Nore's item 
 transport mod as a default part of this mod, to make tubes do something useful!
 Thanks to Nore and RealBadAngel for the code contributions!

common.lua

@@ -86,10 +86,9 @@ function pipeworks.table_contains(tbl, element)
 end
 
 function pipeworks.table_extend(tbl, tbl2)
-	local index = #tbl + 1
-	for _, elt in ipairs(tbl2) do
-		tbl[index] = elt
-		index = index + 1
+	local oldlength = #tbl
+	for i = 1,#tbl2 do
+		tbl[oldlength + i] = tbl2[i]
 	end
 end
 
@@ -115,7 +114,7 @@ local fs_helpers = {}
 pipeworks.fs_helpers = fs_helpers
 function fs_helpers.on_receive_fields(pos, fields)
 	local meta = minetest.get_meta(pos)
-	for field, value in pairs(fields) do
+	for field in pairs(fields) do
 		if pipeworks.string_startswith(field, "fs_helpers_cycling:") then
 			local l = field:split(":")
 			local new_value = tonumber(l[2])
@@ -157,3 +156,135 @@ function pipeworks.load_position(pos)
 	local vm = minetest.get_voxel_manip()
 	vm:read_from_map(pos, pos)
 end
+
+local function delay(...)
+	local args = {...}
+	return (function() return unpack(args) end)
+end
+
+local function get_set_wrap(name, is_dynamic)
+	return (function(self)
+		return self["_" .. name]
+	end), (function(self, value)
+		if is_dynamic then
+			self["_" .. name] = type(value) == "table"
+				and table.copy(value) or value
+		end
+	end)
+end
+
+function pipeworks.create_fake_player(def, is_dynamic)
+	local wielded_item = ItemStack("")
+	if def.inventory and def.wield_list then
+		wielded_item = def.inventory:get_stack(def.wield_list, def.wield_index or 1)
+	end
+	local p = {
+		get_player_name = delay(def.name),
+		is_player = delay(true),
+		is_fake_player = true,
+
+		_formspec = def.formspec or default.gui_survival_form,
+		_hp = def.hp or 20,
+		_breath = 11,
+		_pos = def.position and table.copy(def.position) or vector.new(),
+		_properties = def.properties or { eye_height = def.eye_height or 1.47 },
+		_inventory = def.inventory,
+		_wield_index = def.wield_index or 1,
+		_wielded_item = wielded_item,
+
+		-- Model and view
+		_eye_offset1 = vector.new(),
+		_eye_offset3 = vector.new(),
+		set_eye_offset = function(self, first, third)
+			self._eye_offset1 = table.copy(first)
+			self._eye_offset3 = table.copy(third)
+		end,
+		get_eye_offset = function(self)
+			return self._eye_offset1, self._eye_offset3
+		end,
+		get_look_dir = delay(def.look_dir or {x=0, y=0, z=1}),
+		get_look_pitch = delay(def.look_pitch or 0),
+		get_look_yaw = delay(def.look_yaw or 0),
+		get_look_horizontal = delay(def.look_yaw or 0),
+		get_look_vertical = delay(-(def.look_pitch or 0)),
+		set_animation = delay(),
+
+		-- Controls
+		get_player_control = delay({
+			jump=false, right=false, left=false, LMB=false, RMB=false,
+			sneak=def.sneak, aux1=false, down=false, up=false
+		}),
+		get_player_control_bits = delay(def.sneak and 64 or 0),
+
+		-- Inventory and ItemStacks
+		get_inventory = delay(def.inventory),
+		set_wielded_item = function(self, item)
+			if self._inventory and def.wield_list then
+				return self._inventory:set_stack(def.wield_list,
+					self._wield_index, item)
+			end
+			self._wielded_item = ItemStack(item)
+		end,
+		get_wielded_item = function(self, item)
+			if self._inventory and def.wield_list then
+				return self._inventory:get_stack(def.wield_list,
+					self._wield_index)
+			end
+			return ItemStack(self._wielded_item)
+		end,
+		get_wield_list = delay(def.wield_list),
+
+		punch = delay(),
+		remove = delay(),
+		right_click = delay(),
+		set_attach = delay(),
+		set_detach = delay(),
+		set_bone_position = delay(),
+		hud_change = delay(),
+	}
+	-- Getter & setter functions
+	p.get_inventory_formspec, p.set_inventory_formspec
+		= get_set_wrap("formspec", is_dynamic)
+	p.get_breath, p.set_breath = get_set_wrap("breath", is_dynamic)
+	p.get_hp, p.set_hp = get_set_wrap("hp", is_dynamic)
+	p.get_pos, p.set_pos = get_set_wrap("pos", is_dynamic)
+	p.get_wield_index, p.set_wield_index = get_set_wrap("wield_index", true)
+	p.get_properties, p.set_properties = get_set_wrap("properties", false)
+
+	-- For players, move_to and get_pos do the same
+	p.move_to = p.get_pos
+
+	-- Backwards compatibilty
+	p.getpos = p.get_pos
+	p.setpos = p.set_pos
+	p.moveto = p.move_to
+
+	-- TODO "implement" all these
+	-- set_armor_groups
+	-- get_armor_groups
+	-- get_animation
+	-- get_bone_position
+	-- get_player_velocity
+	-- set_look_pitch
+	-- set_look_yaw
+	-- set_physics_override
+	-- get_physics_override
+	-- hud_add
+	-- hud_remove
+	-- hud_get
+	-- hud_set_flags
+	-- hud_get_flags
+	-- hud_set_hotbar_itemcount
+	-- hud_get_hotbar_itemcount
+	-- hud_set_hotbar_image
+	-- hud_get_hotbar_image
+	-- hud_set_hotbar_selected_image
+	-- hud_get_hotbar_selected_image
+	-- hud_replace_builtin
+	-- set_sky
+	-- get_sky
+	-- override_day_night_ratio
+	-- get_day_night_ratio
+	-- set_local_animation
+	return p
+end

compat-chests.lua

@@ -36,7 +36,7 @@ local function get_chest_formspec(pos)
 				pipeworks.button_on
 			}
 		)..pipeworks.button_label
-	
+
 	return formspec
 end
 
@@ -44,6 +44,7 @@ local function chest_lid_obstructed(pos)
 	local above = { x = pos.x, y = pos.y + 1, z = pos.z }
 	local def = minetest.registered_nodes[minetest.get_node(above).name]
 	-- allow ladders, signs, wallmounted things and torches to not obstruct
+	if not def then return true end
 	if def.drawtype == "airlike" or
 			def.drawtype == "signlike" or
 			def.drawtype == "torchlike" or
@@ -62,24 +63,22 @@ minetest.register_on_player_receive_fields(function(player, formname, fields)
 				local sound = open_chests[pn].sound
 				local swap = open_chests[pn].swap
 				local node = minetest.get_node(pos)
-				
+
 				open_chests[pn] = nil
-				for k, v in pairs(open_chests) do
+				for _, v in pairs(open_chests) do
 					if v.pos.x == pos.x and v.pos.y == pos.y and v.pos.z == pos.z then
 						return true
 					end
 				end
 				minetest.after(0.2, function()
 					minetest.swap_node(pos, { name = "default:" .. swap, param2 = node.param2 })
-					
+
 					-- Pipeworks notification
 					pipeworks.after_place(pos)
 				end)
 				minetest.sound_play(sound, {gain = 0.3, pos = pos, max_hear_distance = 10})
-			end
-			
-			-- Pipeworks Switch
-			if pipeworks.may_configure(pos, player) and not fields.quit then
+			elseif pipeworks.may_configure(pos, player) then
+				-- Pipeworks Switch
 				fs_helpers.on_receive_fields(pos, fields)
 				minetest.show_formspec(player:get_player_name(), "pipeworks:chest_formspec", get_chest_formspec(pos))
 			end
@@ -142,9 +141,11 @@ override_protected = {
 			end
 			return inv:room_for_item("main", stack)
 		end,
+		input_inventory = "main",
 		connect_sides = {left = 1, right = 1, back = 1, bottom = 1, top = 1}
 	},
-	after_dig_node = pipeworks.after_dig
+	after_dig_node = pipeworks.after_dig,
+	on_rotate = pipeworks.on_rotate
 }
 override = {
 	tiles = {
@@ -188,12 +189,13 @@ override = {
 		connect_sides = {left = 1, right = 1, back = 1, bottom = 1, top = 1}
 	},
 	after_place_node = pipeworks.after_place,
-	after_dig_node = pipeworks.after_dig
+	after_dig_node = pipeworks.after_dig,
+	on_rotate = pipeworks.on_rotate
 }
 --[[local override_common = {
-	
+
 }
-for k,v in pairs(override_common) do 
+for k,v in pairs(override_common) do
 	override_protected[k] = v
 	override[k] = v
 end]]
@@ -228,7 +230,7 @@ override.tiles = {
 }
 
 -- Add the extra groups
-for i,v in ipairs({override_protected, override, override_open, override_protected_open}) do
+for _,v in ipairs({override_protected, override, override_open, override_protected_open}) do
 	v.groups.tubedevice = 1
 	v.groups.tubedevice_receiver = 1
 end

compat-furnaces.lua

@@ -1,10 +1,13 @@
-
 -- this file is basically a modified copy of
 -- minetest_game/mods/default/furnaces.lua
 
+-- translation support
+local S = minetest.get_translator("pipeworks")
+local DS = minetest.get_translator("default")
+
 local fs_helpers = pipeworks.fs_helpers
 
-tube_entry = "^pipeworks_tube_connection_stony.png"
+local tube_entry = "^pipeworks_tube_connection_stony.png"
 
 local function active_formspec(fuel_percent, item_percent, pos, meta)
 	local formspec =
@@ -36,7 +39,7 @@ local function active_formspec(fuel_percent, item_percent, pos, meta)
 					pipeworks.button_off,
 					pipeworks.button_on
 				}
-			).."label[0.9,3.51;Allow splitting incoming material (not fuel) stacks from tubes]"
+			).."label[0.9,3.51;"..S("Allow splitting incoming material (not fuel) stacks from tubes").."]"
 	return formspec
 end
 
@@ -67,7 +70,7 @@ local function inactive_formspec(pos, meta)
 				pipeworks.button_off,
 				pipeworks.button_on
 			}
-		).."label[0.9,3.51;Allow splitting incoming material (not fuel) stacks from tubes]"
+		).."label[0.9,3.51;"..S("Allow splitting incoming material (not fuel) stacks from tubes").."]"
 	return formspec
 end
 
@@ -90,7 +93,7 @@ local function allow_metadata_inventory_put(pos, listname, index, stack, player)
 	if listname == "fuel" then
 		if minetest.get_craft_result({method="fuel", width=1, items={stack}}).time ~= 0 then
 			if inv:is_empty("src") then
-				meta:set_string("infotext", "Furnace is empty")
+				meta:set_string("infotext", DS("Furnace is empty"))
 			end
 			return stack:get_count()
 		else
@@ -219,40 +222,40 @@ local function furnace_node_timer(pos, elapsed)
 	if cookable then
 		item_percent = math.floor(src_time / cooked.time * 100)
 		if item_percent > 100 then
-			item_state = "100% (output full)"
+			item_state = DS("100% (output full)")
 		else
-			item_state = item_percent .. "%"
+			item_state = DS("@1%", item_percent)
 		end
 	else
 		if srclist[1]:is_empty() then
-			item_state = "Empty"
+			item_state = DS("Empty")
 		else
-			item_state = "Not cookable"
+			item_state = DS("Not cookable")
 		end
 	end
 
-	local fuel_state = "Empty"
-	local active = "inactive "
+	local fuel_state = DS("Empty")
+	local active = DS("Furnace inactive")
 	local result = false
 
 	if fuel_totaltime ~= 0 then
-		active = "active "
+		active = DS("Furnace active")
 		local fuel_percent = math.floor(fuel_time / fuel_totaltime * 100)
-		fuel_state = fuel_percent .. "%"
+		fuel_state = DS("@1%", fuel_percent)
 		formspec = active_formspec(fuel_percent, item_percent, pos, meta)
 		swap_node(pos, "default:furnace_active")
 		-- make sure timer restarts automatically
 		result = true
 	else
 		if not fuellist[1]:is_empty() then
-			fuel_state = "0%"
+			fuel_state = DS("@1%", "0")
 		end
 		swap_node(pos, "default:furnace")
 		-- stop timer on the inactive furnace
 		minetest.get_node_timer(pos):stop()
 	end
 
-	local infotext = "Furnace " .. active .. "(Item: " .. item_state .. "; Fuel: " .. fuel_state .. ")"
+	local infotext = active.." "..DS("(Item: @1; Fuel: @2)", item_state, fuel_state)
 
 	--
 	-- Set meta values
@@ -271,7 +274,7 @@ end
 --
 
 minetest.register_node(":default:furnace", {
-	description = "Furnace",
+	description = DS("Furnace"),
 	tiles = {
 		"default_furnace_top.png"..tube_entry,
 		"default_furnace_bottom.png"..tube_entry,
@@ -355,11 +358,12 @@ minetest.register_node(":default:furnace", {
 		meta:set_string("formspec", formspec)
 	end,
 	after_place_node = pipeworks.after_place,
-	after_dig_node = pipeworks.after_dig
+	after_dig_node = pipeworks.after_dig,
+	on_rotate = pipeworks.on_rotate
 })
 
 minetest.register_node(":default:furnace_active", {
-	description = "Furnace",
+	description = DS("Furnace"),
 	tiles = {
 		"default_furnace_top.png"..tube_entry,
 		"default_furnace_bottom.png"..tube_entry,
@@ -428,6 +432,7 @@ minetest.register_node(":default:furnace_active", {
 		meta:set_string("formspec", formspec)
 	end,
 	after_place_node = pipeworks.after_place,
-	after_dig_node = pipeworks.after_dig
+	after_dig_node = pipeworks.after_dig,
+	on_rotate = pipeworks.on_rotate
 })
 

crafts.lua

@@ -9,6 +9,13 @@ minetest.register_craft( {
         },
 })
 
+minetest.register_craft( {
+        output = "pipeworks:straight_pipe_empty 3",
+        recipe = {
+                { "pipeworks:pipe_1_empty", "pipeworks:pipe_1_empty", "pipeworks:pipe_1_empty" },
+        },
+})
+
 minetest.register_craft( {
         output = "pipeworks:spigot 3",
         recipe = {
@@ -78,74 +85,3 @@ minetest.register_craft( {
 				{ "pipeworks:pipe_1_empty" }
         },
 })
-
-
--- Crafting recipes for pneumatic tubes
-
--- If homedecor is not installed, we need to register its crafting chain for
--- plastic sheeting so that pipeworks remains compatible with it.
-
-if minetest.get_modpath("homedecor") == nil then
-
-	minetest.register_craftitem(":homedecor:oil_extract", {
-		    description = "Oil extract",
-		    inventory_image = "homedecor_oil_extract.png",
-	})
-
-	minetest.register_craftitem(":homedecor:paraffin", {
-		    description = "Unprocessed paraffin",
-		    inventory_image = "homedecor_paraffin.png",
-	})
-
-	minetest.register_alias("homedecor:plastic_base", "homedecor:paraffin")
-
-	minetest.register_craftitem(":homedecor:plastic_sheeting", {
-		    description = "Plastic sheet",
-		    inventory_image = "homedecor_plastic_sheeting.png",
-	})
-
-	minetest.register_craft({
-		type = "shapeless",
-		output = "homedecor:oil_extract 4",
-		recipe = {
-			"group:leaves",
-			"group:leaves",
-			"group:leaves",
-			"group:leaves",
-			"group:leaves",
-			"group:leaves"
-		}
-	})
-
-	minetest.register_craft({
-		    type = "cooking",
-		    output = "homedecor:paraffin",
-		    recipe = "homedecor:oil_extract",
-	})
-
-	minetest.register_craft({
-		    type = "cooking",
-		    output = "homedecor:plastic_sheeting",
-		    recipe = "homedecor:paraffin",
-	})
-
-	minetest.register_craft({
-		    type = "fuel",
-		    recipe = "homedecor:oil_extract",
-		    burntime = 30,
-	})
-
-	minetest.register_craft({
-		    type = "fuel",
-		    recipe = "homedecor:paraffin",
-		    burntime = 30,
-	})
-
-	minetest.register_craft({
-		    type = "fuel",
-		    recipe = "homedecor:plastic_sheeting",
-		    burntime = 30,
-	})
-end
-
-

decorative_tubes.lua

@@ -1,7 +1,9 @@
+local S = minetest.get_translator("pipeworks")
+
 local straight = function(pos, node, velocity, stack) return {velocity} end
 
 minetest.register_node("pipeworks:steel_block_embedded_tube", {
-	description = "Airtight steelblock embedded tube",
+	description = S("Airtight steelblock embedded tube"),
 	tiles = {
 		"default_steel_block.png", "default_steel_block.png",
 		"default_steel_block.png", "default_steel_block.png",
@@ -24,6 +26,7 @@ minetest.register_node("pipeworks:steel_block_embedded_tube", {
 	},
 	after_place_node = pipeworks.after_place,
 	after_dig_node = pipeworks.after_dig,
+	on_rotate = pipeworks.on_rotate,
 })
 
 minetest.register_craft( {
@@ -44,7 +47,7 @@ local pane_box = {
 }
 minetest.register_node("pipeworks:steel_pane_embedded_tube", {
 	drawtype = "nodebox",
-	description = "Airtight panel embedded tube ",
+	description = S("Airtight panel embedded tube"),
 	tiles = {
 		"pipeworks_pane_embedded_tube_sides.png^[transformR90",
 		"pipeworks_pane_embedded_tube_sides.png^[transformR90",
@@ -71,6 +74,7 @@ minetest.register_node("pipeworks:steel_pane_embedded_tube", {
 	},
 	after_place_node = pipeworks.after_place,
 	after_dig_node = pipeworks.after_dig,
+	on_rotate = pipeworks.on_rotate,
 })
 
 minetest.register_craft( {

default_settings.lua

@@ -4,6 +4,7 @@ local prefix = "pipeworks_"
 
 local settings = {
 	enable_pipes = true,
+	enable_lowpoly = false,
 	enable_autocrafter = true,
 	enable_deployer = true,
 	enable_dispenser = true,
@@ -15,18 +16,49 @@ local settings = {
 	enable_detector_tube = true,
 	enable_digiline_detector_tube = true,
 	enable_conductor_tube = true,
+	enable_digiline_conductor_tube = true,
 	enable_accelerator_tube = true,
 	enable_crossing_tube = true,
 	enable_sand_tube = true,
 	enable_mese_sand_tube = true,
 	enable_one_way_tube = true,
 	enable_priority_tube = true,
+	enable_lua_tube = true,
 	enable_cyclic_mode = true,
 	drop_on_routing_fail = false,
-
 	delete_item_on_clearobject = true,
 }
 
+pipeworks.toggles = {}
+-- documentation for toggles controlling pressure logic features.
+-- do not edit this file directly;
+-- instead, create pipeworks_settings.txt in your world directory,
+-- and copy the uncommented lines from the block comments below into it.
+--[[
+-- flow logic implementation.
+-- set to one of the following strings.
+-- "classic": classic mode written by VanessaE
+-- "pressure": pressure metadata based, written by thetaepsilon.
+--	has caveats such as water speed issues though.
+-- setting to nil inhibits all flow logic, useful for debugging ABM crashes,
+-- or for rendering the pipes purely decorative.
+]]
+pipeworks.toggles.pipe_mode = "classic"
+--[[
+-- force-enable finite water handling mode.
+-- this changes the way that water node placement is handled;
+-- volume will always be preserved,
+-- and water is assumed to move itself downwards.
+-- nil (the default) means autodetect from installed finite liquid mods,
+-- true is force-on, false is force-off.
+-- note that you should NOT normally explicitly set this to true/false,
+-- unless the mod you want this for is not covered by auto-detection
+-- (please see autodetect-finite-water.lua).
+-- please file an issue if you have a finite water mod not covered there,
+-- and feel it necessary to explicitly set this toggle
+pipeworks.toggles.finite_water = nil
+]]
+
 for name, value in pairs(settings) do
 	local setting_type = type(value)
 	if setting_type == "boolean" then

depends.txt

@@ -1,4 +0,0 @@
-default
-mesecons?
-mesecons_mvps?
-digilines?

description.txt

@@ -1 +0,0 @@
-This mod uses mesh nodes and nodeboxes to supply a complete set of 3D pipes and tubes, along with devices that work with them.

devices.lua

@@ -1,3 +1,8 @@
+local S = minetest.get_translator("pipeworks")
+local new_flow_logic_register = pipeworks.flowables.register
+
+local polys = ""
+if pipeworks.enable_lowpoly then polys = "_lowpoly" end
 
 -- rotation handlers
 
@@ -5,7 +10,7 @@ function pipeworks.fix_after_rotation(pos, node, user, mode, new_param2)
 
 	if string.find(node.name, "spigot") then new_param2 = new_param2 % 4 end
 
-	newnode = string.gsub(node.name, "_on", "_off")
+	local newnode = string.gsub(node.name, "_on", "_off")
 	minetest.swap_node(pos, { name = newnode, param2 = new_param2 })
 	pipeworks.scan_for_pipe_objects(pos)
 
@@ -15,7 +20,7 @@ end
 function pipeworks.rotate_on_place(itemstack, placer, pointed_thing)
 
 	local playername = placer:get_player_name()
-	if not minetest.is_protected(pointed_thing.under, playername) 
+	if not minetest.is_protected(pointed_thing.under, playername)
 	   and not minetest.is_protected(pointed_thing.above, playername) then
 
 		local node = minetest.get_node(pointed_thing.under)
@@ -31,9 +36,7 @@ function pipeworks.rotate_on_place(itemstack, placer, pointed_thing)
 			local under = pointed_thing.under
 			local fdir = minetest.dir_to_facedir(placer:get_look_dir())
 			local undernode = minetest.get_node(under)
-			local abovenode = minetest.get_node(above)
 			local uname = undernode.name
-			local aname = abovenode.name
 			local isabove = (above.x == under.x) and (above.z == under.z) and (pitch > 0)
 			local pos1 = above
 
@@ -68,7 +71,7 @@ function pipeworks.rotate_on_place(itemstack, placer, pointed_thing)
 			local placednode = string.gsub(itemstack:get_name(), "_loaded", "_empty")
 			placednode = string.gsub(placednode, "_on", "_off")
 
-			minetest.add_node(pos1, {name = placednode, param2 = fdir })
+			minetest.swap_node(pos1, {name = placednode, param2 = fdir })
 			pipeworks.scan_for_pipe_objects(pos1)
 
 			if not pipeworks.expect_infinite_stacks then
@@ -100,6 +103,7 @@ if minetest.get_modpath("mesecons") then
 	}
 end
 
+--[[
 local pipes_devicelist = {
 	"pump",
 	"valve",
@@ -115,29 +119,31 @@ local pipes_devicelist = {
 	"storage_tank_9",
 	"storage_tank_10"
 }
+--]]
 
 -- Now define the nodes.
 
 local states = { "on", "off" }
-local dgroups = ""
 
 for s in ipairs(states) do
 
+	local dgroups
 	if states[s] == "off" then
 		dgroups = {snappy=3, pipe=1}
 	else
 		dgroups = {snappy=3, pipe=1, not_in_creative_inventory=1}
 	end
 
-	minetest.register_node("pipeworks:pump_"..states[s], {
-		description = "Pump/Intake Module",
+	local pumpname = "pipeworks:pump_"..states[s]
+	minetest.register_node(pumpname, {
+		description = S("Pump/Intake Module"),
 		drawtype = "mesh",
-		mesh = "pipeworks_pump.obj",
+		mesh = "pipeworks_pump"..polys..".obj",
 		tiles = { "pipeworks_pump_"..states[s]..".png" },
 		paramtype = "light",
 		paramtype2 = "facedir",
 		groups = dgroups,
-		sounds = default.node_sound_wood_defaults(),
+		sounds = default.node_sound_metal_defaults(),
 		walkable = true,
 		pipe_connections = { top = 1 },
 		after_place_node = function(pos)
@@ -149,37 +155,47 @@ for s in ipairs(states) do
 		drop = "pipeworks:pump_off",
 		mesecons = {effector = {
 			action_on = function (pos, node)
-				minetest.add_node(pos,{name="pipeworks:pump_on", param2 = node.param2}) 
+				minetest.swap_node(pos,{name="pipeworks:pump_on", param2 = node.param2})
 			end,
 			action_off = function (pos, node)
-				minetest.add_node(pos,{name="pipeworks:pump_off", param2 = node.param2}) 
+				minetest.swap_node(pos,{name="pipeworks:pump_off", param2 = node.param2})
 			end
 		}},
 		on_rightclick = function(pos, node, clicker, itemstack, pointed_thing)
 			local fdir = node.param2
-			minetest.add_node(pos, { name = "pipeworks:pump_"..states[3-s], param2 = fdir })
+			minetest.swap_node(pos, { name = "pipeworks:pump_"..states[3-s], param2 = fdir })
 		end,
 		on_rotate = screwdriver.rotate_simple
 	})
-	
-	minetest.register_node("pipeworks:valve_"..states[s].."_empty", {
-		description = "Valve",
+
+	-- FIXME: this currently assumes that pumps can only rotate around the fixed axis pointing Y+.
+	new_flow_logic_register.directional_vertical_fixed(pumpname, true)
+	local pump_drive = 4
+	if states[s] ~= "off" then
+		new_flow_logic_register.intake_simple(pumpname, pump_drive)
+	end
+
+
+
+	local nodename_valve_empty = "pipeworks:valve_"..states[s].."_empty"
+	minetest.register_node(nodename_valve_empty, {
+		description = S("Valve"),
 		drawtype = "mesh",
-		mesh = "pipeworks_valve_"..states[s]..".obj",
+		mesh = "pipeworks_valve_"..states[s]..polys..".obj",
 		tiles = { "pipeworks_valve.png" },
 		sunlight_propagates = true,
 		paramtype = "light",
 		paramtype2 = "facedir",
 		selection_box = {
-	             	type = "fixed",
+			type = "fixed",
 			fixed = { -5/16, -4/16, -8/16, 5/16, 5/16, 8/16 }
 		},
 		collision_box = {
-	             	type = "fixed",
+			type = "fixed",
 			fixed = { -5/16, -4/16, -8/16, 5/16, 5/16, 8/16 }
 		},
 		groups = dgroups,
-		sounds = default.node_sound_wood_defaults(),
+		sounds = default.node_sound_metal_defaults(),
 		walkable = true,
 		on_place = pipeworks.rotate_on_place,
 		after_dig_node = function(pos)
@@ -188,38 +204,44 @@ for s in ipairs(states) do
 		drop = "pipeworks:valve_off_empty",
 		mesecons = {effector = {
 			action_on = function (pos, node)
-				minetest.add_node(pos,{name="pipeworks:valve_on_empty", param2 = node.param2}) 
+				minetest.swap_node(pos,{name="pipeworks:valve_on_empty", param2 = node.param2})
 			end,
 			action_off = function (pos, node)
-				minetest.add_node(pos,{name="pipeworks:valve_off_empty", param2 = node.param2}) 
+				minetest.swap_node(pos,{name="pipeworks:valve_off_empty", param2 = node.param2})
 			end
 		}},
 		on_rightclick = function(pos, node, clicker, itemstack, pointed_thing)
 			local fdir = node.param2
-			minetest.add_node(pos, { name = "pipeworks:valve_"..states[3-s].."_empty", param2 = fdir })
+			minetest.swap_node(pos, { name = "pipeworks:valve_"..states[3-s].."_empty", param2 = fdir })
 		end,
 		on_rotate = pipeworks.fix_after_rotation
 	})
+	-- only register flow logic for the "on" ABM.
+	-- this means that the off state automatically blocks flow by not participating in the balancing operation.
+	if states[s] ~= "off" then
+		new_flow_logic_register.directional_horizonal_rotate(nodename_valve_empty, true)
+	end
 end
 
-minetest.register_node("pipeworks:valve_on_loaded", {
-	description = "Valve",
+local nodename_valve_loaded = "pipeworks:valve_on_loaded"
+minetest.register_node(nodename_valve_loaded, {
+	description = S("Valve"),
 	drawtype = "mesh",
-	mesh = "pipeworks_valve_on.obj",
+	mesh = "pipeworks_valve_on"..polys..".obj",
 	tiles = { "pipeworks_valve.png" },
 	sunlight_propagates = true,
 	paramtype = "light",
 	paramtype2 = "facedir",
 	selection_box = {
-             	type = "fixed",
+		type = "fixed",
 		fixed = { -5/16, -4/16, -8/16, 5/16, 5/16, 8/16 }
 	},
 	collision_box = {
-             	type = "fixed",
+		type = "fixed",
 		fixed = { -5/16, -4/16, -8/16, 5/16, 5/16, 8/16 }
 	},
 	groups = {snappy=3, pipe=1, not_in_creative_inventory=1},
-	sounds = default.node_sound_wood_defaults(),
+	sounds = default.node_sound_metal_defaults(),
 	walkable = true,
 	on_place = pipeworks.rotate_on_place,
 	after_dig_node = function(pos)
@@ -228,23 +250,30 @@ minetest.register_node("pipeworks:valve_on_loaded", {
 	drop = "pipeworks:valve_off_empty",
 	mesecons = {effector = {
 		action_on = function (pos, node)
-			minetest.add_node(pos,{name="pipeworks:valve_on_empty", param2 = node.param2}) 
+			minetest.swap_node(pos,{name="pipeworks:valve_on_empty", param2 = node.param2})
 		end,
 		action_off = function (pos, node)
-			minetest.add_node(pos,{name="pipeworks:valve_off_empty", param2 = node.param2}) 
+			minetest.swap_node(pos,{name="pipeworks:valve_off_empty", param2 = node.param2})
 		end
 	}},
 	on_rightclick = function(pos, node, clicker, itemstack, pointed_thing)
 		local fdir = node.param2
-		minetest.add_node(pos, { name = "pipeworks:valve_off_empty", param2 = fdir })
+		minetest.swap_node(pos, { name = "pipeworks:valve_off_empty", param2 = fdir })
 	end,
 	on_rotate = pipeworks.fix_after_rotation
 })
+-- register this the same as the on-but-empty variant, so existing nodes of this type work also.
+-- note that as new_flow_logic code does not distinguish empty/full in node states,
+-- right-clicking a "loaded" valve (becoming an off valve) then turning it on again will yield a on-but-empty valve,
+-- but the flow logic will still function.
+-- thus under new_flow_logic this serves as a kind of migration.
+new_flow_logic_register.directional_horizonal_rotate(nodename_valve_loaded, true)
 
 -- grating
 
+-- FIXME: should this do anything useful in the new flow logic?
 minetest.register_node("pipeworks:grating", {
-	description = "Decorative grating",
+	description = S("Decorative grating"),
 	tiles = {
 		"pipeworks_grating_top.png",
 		"pipeworks_grating_sides.png",
@@ -261,7 +290,7 @@ minetest.register_node("pipeworks:grating", {
 	sunlight_propagates = true,
 	paramtype = "light",
 	groups = {snappy=3, pipe=1},
-	sounds = default.node_sound_wood_defaults(),
+	sounds = default.node_sound_metal_defaults(),
 	walkable = true,
 	pipe_connections = { top = 1 },
 	after_place_node = function(pos)
@@ -275,16 +304,17 @@ minetest.register_node("pipeworks:grating", {
 
 -- outlet spigot
 
-minetest.register_node("pipeworks:spigot", {
-	description = "Spigot outlet",
+local nodename_spigot_empty = "pipeworks:spigot"
+minetest.register_node(nodename_spigot_empty, {
+	description = S("Spigot outlet"),
 	drawtype = "mesh",
-	mesh = "pipeworks_spigot.obj",
+	mesh = "pipeworks_spigot"..polys..".obj",
 	tiles = { "pipeworks_spigot.png" },
 	sunlight_propagates = true,
 	paramtype = "light",
 	paramtype2 = "facedir",
 	groups = {snappy=3, pipe=1},
-	sounds = default.node_sound_wood_defaults(),
+	sounds = default.node_sound_metal_defaults(),
 	walkable = true,
 	pipe_connections = { left=1, right=1, front=1, back=1,
 						 left_param2 = 3, right_param2 = 1, front_param2 = 2, back_param2 = 0 },
@@ -305,10 +335,11 @@ minetest.register_node("pipeworks:spigot", {
 	on_rotate = pipeworks.fix_after_rotation
 })
 
-minetest.register_node("pipeworks:spigot_pouring", {
-	description = "Spigot outlet",
+local nodename_spigot_loaded = "pipeworks:spigot_pouring"
+minetest.register_node(nodename_spigot_loaded, {
+	description = S("Spigot outlet"),
 	drawtype = "mesh",
-	mesh = "pipeworks_spigot_pouring.obj",
+	mesh = "pipeworks_spigot_pouring"..polys..".obj",
 	tiles = {
 		{
 			name = "default_water_flowing_animated.png",
@@ -325,7 +356,7 @@ minetest.register_node("pipeworks:spigot_pouring", {
 	paramtype = "light",
 	paramtype2 = "facedir",
 	groups = {snappy=3, pipe=1, not_in_creative_inventory=1},
-	sounds = default.node_sound_wood_defaults(),
+	sounds = default.node_sound_metal_defaults(),
 	walkable = true,
 	pipe_connections = { left=1, right=1, front=1, back=1,
 						 left_param2 = 3, right_param2 = 1, front_param2 = 2, back_param2 = 0 },
@@ -347,6 +378,17 @@ minetest.register_node("pipeworks:spigot_pouring", {
 	drop = "pipeworks:spigot",
 	on_rotate = pipeworks.fix_after_rotation
 })
+-- new flow logic does not currently distinguish between these two visual states.
+-- register both so existing flowing spigots continue to work (even if the visual doesn't match the spigot's behaviour).
+new_flow_logic_register.directional_horizonal_rotate(nodename_spigot_empty, false)
+new_flow_logic_register.directional_horizonal_rotate(nodename_spigot_loaded, false)
+local spigot_upper = 1.0
+local spigot_lower = 1.0
+local spigot_neighbours={{x=0, y=-1, z=0}}
+new_flow_logic_register.output_simple(nodename_spigot_empty, spigot_upper, spigot_lower, spigot_neighbours)
+new_flow_logic_register.output_simple(nodename_spigot_loaded, spigot_upper, spigot_lower, spigot_neighbours)
+
+
 
 -- sealed pipe entry/exit (horizontal pipe passing through a metal
 -- wall, for use in places where walls should look like they're airtight)
@@ -359,15 +401,16 @@ local panel_cbox = {
 	}
 }
 
-minetest.register_node("pipeworks:entry_panel_empty", {
-	description = "Airtight Pipe entry/exit",
+local nodename_panel_empty = "pipeworks:entry_panel_empty"
+minetest.register_node(nodename_panel_empty, {
+	description = S("Airtight Pipe entry/exit"),
 	drawtype = "mesh",
-	mesh = "pipeworks_entry_panel.obj",
+	mesh = "pipeworks_entry_panel"..polys..".obj",
 	tiles = { "pipeworks_entry_panel.png" },
 	paramtype = "light",
 	paramtype2 = "facedir",
 	groups = {snappy=3, pipe=1},
-	sounds = default.node_sound_wood_defaults(),
+	sounds = default.node_sound_metal_defaults(),
 	walkable = true,
 	on_place = pipeworks.rotate_on_place,
 	after_dig_node = function(pos)
@@ -378,15 +421,16 @@ minetest.register_node("pipeworks:entry_panel_empty", {
 	on_rotate = pipeworks.fix_after_rotation
 })
 
-minetest.register_node("pipeworks:entry_panel_loaded", {
-	description = "Airtight Pipe entry/exit",
+local nodename_panel_loaded = "pipeworks:entry_panel_loaded"
+minetest.register_node(nodename_panel_loaded, {
+	description = S("Airtight Pipe entry/exit"),
 	drawtype = "mesh",
-	mesh = "pipeworks_entry_panel.obj",
+	mesh = "pipeworks_entry_panel"..polys..".obj",
 	tiles = { "pipeworks_entry_panel.png" },
 	paramtype = "light",
 	paramtype2 = "facedir",
 	groups = {snappy=3, pipe=1, not_in_creative_inventory=1},
-	sounds = default.node_sound_wood_defaults(),
+	sounds = default.node_sound_metal_defaults(),
 	walkable = true,
 	on_place = pipeworks.rotate_on_place,
 	after_dig_node = function(pos)
@@ -397,17 +441,23 @@ minetest.register_node("pipeworks:entry_panel_loaded", {
 	drop = "pipeworks:entry_panel_empty",
 	on_rotate = pipeworks.fix_after_rotation
 })
+-- TODO: AFAIK the two panels have no visual difference, so are redundant under new flow logic - alias?
+new_flow_logic_register.directional_horizonal_rotate(nodename_panel_empty, true)
+new_flow_logic_register.directional_horizonal_rotate(nodename_panel_loaded, true)
 
-minetest.register_node("pipeworks:flow_sensor_empty", {
-	description = "Flow Sensor",
+
+
+local nodename_sensor_empty = "pipeworks:flow_sensor_empty"
+minetest.register_node(nodename_sensor_empty, {
+	description = S("Flow Sensor"),
 	drawtype = "mesh",
-	mesh = "pipeworks_flow_sensor.obj",
+	mesh = "pipeworks_flow_sensor"..polys..".obj",
 	tiles = { "pipeworks_flow_sensor_off.png" },
 	sunlight_propagates = true,
 	paramtype = "light",
 	paramtype2 = "facedir",
 	groups = {snappy=3, pipe=1},
-	sounds = default.node_sound_wood_defaults(),
+	sounds = default.node_sound_metal_defaults(),
 	walkable = true,
 	on_place = pipeworks.rotate_on_place,
 	after_dig_node = function(pos)
@@ -415,7 +465,7 @@ minetest.register_node("pipeworks:flow_sensor_empty", {
 	end,
 	on_construct = function(pos)
 		if mesecon then
-			mesecon.receptor_off(pos, rules) 
+			mesecon.receptor_off(pos, pipeworks.mesecons_rules)
 		end
 	end,
 	selection_box = {
@@ -436,16 +486,17 @@ minetest.register_node("pipeworks:flow_sensor_empty", {
 	on_rotate = pipeworks.fix_after_rotation
 })
 
-minetest.register_node("pipeworks:flow_sensor_loaded", {
-	description = "Flow sensor (on)",
+local nodename_sensor_loaded = "pipeworks:flow_sensor_loaded"
+minetest.register_node(nodename_sensor_loaded, {
+	description = S("Flow sensor (on)"),
 	drawtype = "mesh",
-	mesh = "pipeworks_flow_sensor.obj",
+	mesh = "pipeworks_flow_sensor"..polys..".obj",
 	tiles = { "pipeworks_flow_sensor_on.png" },
 	sunlight_propagates = true,
 	paramtype = "light",
 	paramtype2 = "facedir",
 	groups = {snappy=3, pipe=1, not_in_creative_inventory=1},
-	sounds = default.node_sound_wood_defaults(),
+	sounds = default.node_sound_metal_defaults(),
 	walkable = true,
 	on_place = pipeworks.rotate_on_place,
 	after_dig_node = function(pos)
@@ -453,7 +504,7 @@ minetest.register_node("pipeworks:flow_sensor_loaded", {
 	end,
 	on_construct = function(pos)
 		if mesecon then
-			mesecon.receptor_on(pos, rules) 
+			mesecon.receptor_on(pos, pipeworks.mesecons_rules)
 		end
 	end,
 	selection_box = {
@@ -474,22 +525,30 @@ minetest.register_node("pipeworks:flow_sensor_loaded", {
 	mesecons = pipereceptor_on,
 	on_rotate = pipeworks.fix_after_rotation
 })
+new_flow_logic_register.directional_horizonal_rotate(nodename_sensor_empty, true)
+new_flow_logic_register.directional_horizonal_rotate(nodename_sensor_loaded, true)
+-- activate flow sensor at roughly half the pressure pumps drive pipes
+local sensor_pressure_set = { { nodename_sensor_empty, 0.0 }, { nodename_sensor_loaded, 1.0 } }
+new_flow_logic_register.transition_simple_set(sensor_pressure_set, { mesecons=pipeworks.mesecons_rules })
+
+
 
 -- tanks
 
+-- TODO flow-logic-stub: these don't currently do anything under the new flow logic.
 for fill = 0, 10 do
-	local filldesc="empty"
+	local filldesc=S("empty")
 	local sgroups = {snappy=3, pipe=1, tankfill=fill+1}
 	local image = nil
 
 	if fill ~= 0 then
-		filldesc=fill.."0% full"
+		filldesc=S("@1% full", 10*fill)
 		sgroups = {snappy=3, pipe=1, tankfill=fill+1, not_in_creative_inventory=1}
 		image = "pipeworks_storage_tank_fittings.png"
 	end
 
 	minetest.register_node("pipeworks:expansion_tank_"..fill, {
-		description = "Expansion Tank ("..filldesc..")... You hacker, you.",
+		description = S("Expansion Tank (@1)", filldesc),
 		tiles = {
 			"pipeworks_storage_tank_fittings.png",
 			"pipeworks_storage_tank_fittings.png",
@@ -502,7 +561,7 @@ for fill = 0, 10 do
 		paramtype = "light",
 		paramtype2 = "facedir",
 		groups = {snappy=3, pipe=1, tankfill=fill+1, not_in_creative_inventory=1},
-		sounds = default.node_sound_wood_defaults(),
+		sounds = default.node_sound_metal_defaults(),
 		walkable = true,
 		drop = "pipeworks:storage_tank_0",
 		pipe_connections = { top = 1, bottom = 1},
@@ -517,7 +576,7 @@ for fill = 0, 10 do
 	})
 
 	minetest.register_node("pipeworks:storage_tank_"..fill, {
-		description = "Fluid Storage Tank ("..filldesc..")",
+		description = S("Fluid Storage Tank (@1)", filldesc),
 		tiles = {
 			"pipeworks_storage_tank_fittings.png",
 			"pipeworks_storage_tank_fittings.png",
@@ -530,7 +589,7 @@ for fill = 0, 10 do
 		paramtype = "light",
 		paramtype2 = "facedir",
 		groups = sgroups,
-		sounds = default.node_sound_wood_defaults(),
+		sounds = default.node_sound_metal_defaults(),
 		walkable = true,
 		drop = "pipeworks:storage_tank_0",
 		pipe_connections = { top = 1, bottom = 1},
@@ -547,15 +606,16 @@ end
 
 -- fountainhead
 
-minetest.register_node("pipeworks:fountainhead", {
-	description = "Fountainhead",
+local nodename_fountain_empty = "pipeworks:fountainhead"
+minetest.register_node(nodename_fountain_empty, {
+	description = S("Fountainhead"),
 	drawtype = "mesh",
-	mesh = "pipeworks_fountainhead.obj",
+	mesh = "pipeworks_fountainhead"..polys..".obj",
 	tiles = { "pipeworks_fountainhead.png" },
 	sunlight_propagates = true,
 	paramtype = "light",
 	groups = {snappy=3, pipe=1},
-	sounds = default.node_sound_wood_defaults(),
+	sounds = default.node_sound_metal_defaults(),
 	walkable = true,
 	pipe_connections = { bottom = 1 },
 	after_place_node = function(pos)
@@ -566,7 +626,7 @@ minetest.register_node("pipeworks:fountainhead", {
 	end,
 	on_construct = function(pos)
 		if mesecon then
-			mesecon.receptor_on(pos, rules) 
+			mesecon.receptor_on(pos, pipeworks.mesecons_rules)
 		end
 	end,
 	selection_box = {
@@ -580,15 +640,16 @@ minetest.register_node("pipeworks:fountainhead", {
 	on_rotate = false
 })
 
-minetest.register_node("pipeworks:fountainhead_pouring", {
-	description = "Fountainhead",
+local nodename_fountain_loaded = "pipeworks:fountainhead_pouring"
+minetest.register_node(nodename_fountain_loaded, {
+	description = S("Fountainhead"),
 	drawtype = "mesh",
-	mesh = "pipeworks_fountainhead.obj",
+	mesh = "pipeworks_fountainhead"..polys..".obj",
 	tiles = { "pipeworks_fountainhead.png" },
 	sunlight_propagates = true,
 	paramtype = "light",
 	groups = {snappy=3, pipe=1, not_in_creative_inventory=1},
-	sounds = default.node_sound_wood_defaults(),
+	sounds = default.node_sound_metal_defaults(),
 	walkable = true,
 	pipe_connections = { bottom = 1 },
 	after_place_node = function(pos)
@@ -600,7 +661,7 @@ minetest.register_node("pipeworks:fountainhead_pouring", {
 	end,
 	on_construct = function(pos)
 		if mesecon then
-			mesecon.receptor_on(pos, rules) 
+			mesecon.receptor_on(pos, pipeworks.mesecons_rules)
 		end
 	end,
 	selection_box = {
@@ -614,25 +675,71 @@ minetest.register_node("pipeworks:fountainhead_pouring", {
 	drop = "pipeworks:fountainhead",
 	on_rotate = false
 })
+new_flow_logic_register.directional_vertical_fixed(nodename_fountain_empty, false)
+new_flow_logic_register.directional_vertical_fixed(nodename_fountain_loaded, false)
+local fountain_upper = 1.0
+local fountain_lower = 1.0
+local fountain_neighbours={{x=0, y=1, z=0}}
+new_flow_logic_register.output_simple(nodename_fountain_empty, fountain_upper, fountain_lower, fountain_neighbours)
+new_flow_logic_register.output_simple(nodename_fountain_loaded, fountain_upper, fountain_lower, fountain_neighbours)
+
+local sp_cbox = {
+	type = "fixed",
+	fixed = {
+		{ -2/16, -2/16, -8/16, 2/16, 2/16, 8/16 }
+	}
+}
+
+local nodename_sp_empty = "pipeworks:straight_pipe_empty"
+minetest.register_node(nodename_sp_empty, {
+	description = S("Straight-only Pipe"),
+	drawtype = "mesh",
+	mesh = "pipeworks_straight_pipe"..polys..".obj",
+	tiles = { "pipeworks_straight_pipe_empty.png" },
+	paramtype = "light",
+	paramtype2 = "facedir",
+	groups = {snappy=3, pipe=1},
+	sounds = default.node_sound_metal_defaults(),
+	walkable = true,
+	on_place = pipeworks.rotate_on_place,
+	after_dig_node = function(pos)
+		pipeworks.scan_for_pipe_objects(pos)
+	end,
+	selection_box = sp_cbox,
+	collision_box = sp_cbox,
+	on_rotate = pipeworks.fix_after_rotation,
+	check_for_pole = pipeworks.check_for_vert_pipe,
+	check_for_horiz_pole = pipeworks.check_for_horiz_pipe
+})
+
+local nodename_sp_loaded = "pipeworks:straight_pipe_loaded"
+minetest.register_node(nodename_sp_loaded, {
+	description = S("Straight-only Pipe"),
+	drawtype = "mesh",
+	mesh = "pipeworks_straight_pipe"..polys..".obj",
+	tiles = { "pipeworks_straight_pipe_loaded.png" },
+	paramtype = "light",
+	paramtype2 = "facedir",
+	groups = {snappy=3, pipe=1, not_in_creative_inventory=1},
+	sounds = default.node_sound_metal_defaults(),
+	walkable = true,
+	on_place = pipeworks.rotate_on_place,
+	after_dig_node = function(pos)
+		pipeworks.scan_for_pipe_objects(pos)
+	end,
+	selection_box = sp_cbox,
+	collision_box = sp_cbox,
+	drop = "pipeworks:straight_pipe_empty",
+	on_rotate = pipeworks.fix_after_rotation,
+	check_for_pole = pipeworks.check_for_vert_pipe,
+	check_for_horiz_pole = pipeworks.check_for_horiz_pipe
+})
+
+new_flow_logic_register.directional_horizonal_rotate(nodename_sp_empty, true)
+new_flow_logic_register.directional_horizonal_rotate(nodename_sp_loaded, true)
+
+-- Other misc stuff
 
 minetest.register_alias("pipeworks:valve_off_loaded", "pipeworks:valve_off_empty")
 minetest.register_alias("pipeworks:entry_panel", "pipeworks:entry_panel_empty")
 
-minetest.register_lbm({
-	name = "pipeworks:rotate_valves_flowsensors",
-	label = "Flip pipeworks valves and flow sensors around X/Z",
-	run_at_every_load = false,
-	nodenames = {
-		"pipeworks:flow_sensor_empty",
-		"pipeworks:flow_sensor_loaded",
-		"pipeworks:valve_off_empty",
-		"pipeworks:valve_on_empty",
-		"pipeworks:valve_off_loaded",
-	},
-	action = function(pos, node)
-		local dir = minetest.facedir_to_dir(node.param2)
-		local newdir = { x=dir.z, y=dir.y, z=dir.x }
-		local newfdir = minetest.dir_to_facedir(newdir)
-		minetest.swap_node(pos, { name = node.name, param2 = newfdir })
-	end
-})

filter-injector.lua

@@ -1,51 +1,48 @@
+local S = minetest.get_translator("pipeworks")
 local fs_helpers = pipeworks.fs_helpers
 
-local function delay(x)
-	return (function() return x end)
-end
-
 local function set_filter_infotext(data, meta)
-	local infotext = data.wise_desc.." Filter-Injector"
+	local infotext = S("@1 Filter-Injector", data.wise_desc)
 	if meta:get_int("slotseq_mode") == 2 then
-		infotext = infotext .. " (slot #"..meta:get_int("slotseq_index").." next)"
+		infotext = infotext .. " "..S("(slot #@1 next)", meta:get_int("slotseq_index"))
 	end
 	meta:set_string("infotext", infotext)
 end
 
 local function set_filter_formspec(data, meta)
-	local itemname = data.wise_desc.." Filter-Injector"
+	local itemname = S("@1 Filter-Injector", data.wise_desc)
 
 	local formspec
 	if data.digiline then
 		formspec = "size[8,2.7]"..
 			"item_image[0,0;1,1;pipeworks:"..data.name.."]"..
 			"label[1,0;"..minetest.formspec_escape(itemname).."]"..
-			"field[0.3,1.5;8.0,1;channel;Channel;${channel}]"..
+			"field[0.3,1.5;8.0,1;channel;"..S("Channel")..";${channel}]"..
 			fs_helpers.cycling_button(meta, "button[0,2;4,1", "slotseq_mode",
-				{"Sequence slots by Priority",
-				 "Sequence slots Randomly",
-				 "Sequence slots by Rotation"})..
+				{S("Sequence slots by Priority"),
+				 S("Sequence slots Randomly"),
+				 S("Sequence slots by Rotation")})..
 			fs_helpers.cycling_button(meta, "button[4,2;4,1", "exmatch_mode",
-				{"Exact match - off",
-				 "Exact match - on "})
+				{S("Exact match - off"),
+				 S("Exact match - on")})
 	else
 		local exmatch_button = ""
 		if data.stackwise then
 			exmatch_button =
 				fs_helpers.cycling_button(meta, "button[4,3.5;4,1", "exmatch_mode",
-					{"Exact match - off",
-					 "Exact match - on "})
+					{S("Exact match - off"),
+					 S("Exact match - on")})
 		end
 
 		formspec = "size[8,8.5]"..
 			"item_image[0,0;1,1;pipeworks:"..data.name.."]"..
 			"label[1,0;"..minetest.formspec_escape(itemname).."]"..
-			"label[0,1;Prefer item types:]"..
+			"label[0,1;"..S("Prefer item types:").."]"..
 			"list[context;main;0,1.5;8,2;]"..
 			fs_helpers.cycling_button(meta, "button[0,3.5;4,1", "slotseq_mode",
-				{"Sequence slots by Priority",
-				 "Sequence slots Randomly",
-				 "Sequence slots by Rotation"})..
+				{S("Sequence slots by Priority"),
+				 S("Sequence slots Randomly"),
+				 S("Sequence slots by Rotation")})..
 			exmatch_button..
 			"list[current_player;main;0,4.5;8,4;]" ..
 			"listring[]"
@@ -53,125 +50,13 @@ local function set_filter_formspec(data, meta)
 	meta:set_string("formspec", formspec)
 end
 
--- todo SOON: this function has *way too many* parameters
-local function grabAndFire(data,slotseq_mode,exmatch_mode,filtmeta,frominv,frominvname,frompos,fromnode,filterfor,fromtube,fromdef,dir,fakePlayer,all,digiline)
-	local sposes = {}
-	if not frominvname or not frominv:get_list(frominvname) then return end
-	for spos,stack in ipairs(frominv:get_list(frominvname)) do
-		local matches
-		if filterfor == "" then
-			matches = stack:get_name() ~= ""
-		else
-			local fname = filterfor.name
-			local fgroup = filterfor.group
-			local fwear = filterfor.wear
-			local fmetadata = filterfor.metadata
-			matches = (not fname                                             -- If there's a name filter,
-			           or stack:get_name() == fname)                         --  it must match.
-
-			          and (not fgroup                                        -- If there's a group filter,
-			               or (type(fgroup) == "string"                      --  it must be a string
-			                   and minetest.get_item_group(                  --  and it must match.
-			                                stack:get_name(), fgroup) ~= 0))
-
-			          and (not fwear                                         -- If there's a wear filter:
-			               or (type(fwear) == "number"                       --  If it's a number,
-			                   and stack:get_wear() == fwear)                --   it must match.
-			               or (type(fwear) == "table"                        --  If it's a table:
-			                   and (not fwear[1]                             --   If there's a lower bound,
-			                        or (type(fwear[1]) == "number"           --    it must be a number
-			                            and fwear[1] <= stack:get_wear()))   --    and it must be <= the actual wear.
-			                   and (not fwear[2]                             --   If there's an upper bound
-			                        or (type(fwear[2]) == "number"           --    it must be a number
-			                            and stack:get_wear() < fwear[2]))))  --    and it must be > the actual wear.
-			                                                                 --  If the wear filter is of any other type, fail.
-			                                                                 --
-			          and (not fmetadata                                     -- If there's a matadata filter,
-			               or (type(fmetadata) == "string"                   --  it must be a string
-			                   and stack:get_metadata() == fmetadata))       --  and it must match.
-		end
-		if matches then table.insert(sposes, spos) end
-	end
-	if #sposes == 0 then return false end
-	if slotseq_mode == 1 then
-		for i = #sposes, 2, -1 do
-			local j = math.random(i)
-			local t = sposes[j]
-			sposes[j] = sposes[i]
-			sposes[i] = t
-		end
-	elseif slotseq_mode == 2 then
-		local headpos = filtmeta:get_int("slotseq_index")
-		table.sort(sposes, function (a, b)
-			if a >= headpos then
-				if b < headpos then return true end
-			else
-				if b >= headpos then return false end
-			end
-			return a < b
-		end)
-	end
-	for _, spos in ipairs(sposes) do
-			local stack = frominv:get_stack(frominvname, spos)
-			local doRemove = stack:get_count()
-			if fromtube.can_remove then
-				doRemove = fromtube.can_remove(frompos, fromnode, stack, dir)
-			elseif fromdef.allow_metadata_inventory_take then
-				doRemove = fromdef.allow_metadata_inventory_take(frompos, frominvname,spos, stack, fakePlayer)
-			end
-			-- stupid lack of continue statements grumble
-			if doRemove > 0 then
-				if slotseq_mode == 2 then
-					local nextpos = spos + 1
-					if nextpos > frominv:get_size(frominvname) then
-						nextpos = 1
-					end
-					filtmeta:set_int("slotseq_index", nextpos)
-					set_filter_infotext(data, filtmeta)
-				end
-				local item
-				local count
-				if all then
-					count = math.min(stack:get_count(), doRemove)
-					if filterfor.count and (filterfor.count > 1 or digiline) then
-						if exmatch_mode ~= 0 and filterfor.count > count then
-							return false -- not enough, fail
-						else
-							-- limit quantity to filter amount
-							count = math.min(filterfor.count, count)
-						end
-					end
-				else
-					count = 1
-				end
-				if fromtube.remove_items then
-					-- it could be the entire stack...
-					item = fromtube.remove_items(frompos, fromnode, stack, dir, count)
-				else
-					item = stack:take_item(count)
-					frominv:set_stack(frominvname, spos, stack)
-					if fromdef.on_metadata_inventory_take then
-						fromdef.on_metadata_inventory_take(frompos, frominvname, spos, item, fakePlayer)
-					end
-				end
-				local pos = vector.add(frompos, vector.multiply(dir, 1.4))
-				local start_pos = vector.add(frompos, dir)
-				local item1 = pipeworks.tube_inject_item(pos, start_pos, dir, item)
-				return true-- only fire one item, please
-			end
-	end
-	return false
-end
-
 local function punch_filter(data, filtpos, filtnode, msg)
 	local filtmeta = minetest.get_meta(filtpos)
 	local filtinv = filtmeta:get_inventory()
 	local owner = filtmeta:get_string("owner")
-	local fakePlayer = {
-		get_player_name = delay(owner),
-		is_fake_player = ":pipeworks",
-		get_wielded_item = delay(ItemStack(nil))
-	} -- TODO: use a mechanism as the wielder one
+	local fakePlayer = pipeworks.create_fake_player({
+		name = owner
+	})
 	local dir = pipeworks.facedir_to_right_dir(filtnode.param2)
 	local frompos = vector.subtract(filtpos, dir)
 	local fromnode = minetest.get_node(frompos)
@@ -180,8 +65,6 @@ local function punch_filter(data, filtpos, filtnode, msg)
 	if not fromdef then return end
 	local fromtube = fromdef.tube
 	local input_special_cases = {
-		["technic:mv_furnace"] = "dst",
-		["technic:mv_furnace_active"] = "dst",
 		["technic:mv_electric_furnace"] = "dst",
 		["technic:mv_electric_furnace_active"] = "dst",
 		["technic:mv_alloy_furnace"] = "dst",
@@ -195,6 +78,14 @@ local function punch_filter(data, filtpos, filtnode, msg)
 		["technic:mv_grinder"] = "dst",
 		["technic:mv_grinder_active"] = "dst",
 		["technic:tool_workshop"] = "src",
+		["technic:mv_freezer"] = "dst",
+		["technic:mv_freezer_active"] = "dst",
+		["technic:hv_electric_furnace"] = "dst",
+		["technic:hv_electric_furnace_active"] = "dst",
+		["technic:hv_compressor"] = "dst",
+		["technic:hv_compressor_active"] = "dst",
+		["technic:hv_grinder"] = "dst",
+		["technic:hv_grinder_active"] = "dst"
 	}
 
 	-- make sure there's something appropriate to inject the item into
@@ -214,12 +105,12 @@ local function punch_filter(data, filtpos, filtnode, msg)
 	if not (fromtube and fromtube.input_inventory) then return end
 
 	local slotseq_mode
-	local exact_match
+	local exmatch_mode
 
 	local filters = {}
 	if data.digiline then
 		local function add_filter(name, group, count, wear, metadata)
-			table.insert(filters, {name = name, group = group, count = count, wear = wear, metadata = metadata})
+			table.insert(filters, {name = name, group = group, count = tonumber(count), wear = wear, metadata = metadata})
 		end
 
 		local function add_itemstring_filter(filter)
@@ -251,10 +142,10 @@ local function punch_filter(data, filtpos, filtnode, msg)
 
 			local exmatch = msg.exmatch
 			local t_exmatch = type(exmatch)
-			if t_exmatch == "number" and exmatch >= 0 and exmatch <= 1 then
-				exact_match = exmatch
+			if t_exmatch == "number" and (exmatch == 0 or exmatch == 1) then
+				exmatch_mode = exmatch
 			elseif t_exmatch == "boolean" then
-				exact_match = exmatch and 1 or 0
+				exmatch_mode = exmatch and 1 or 0
 			end
 
 			local slotseq_index = msg.slotseq_index
@@ -271,11 +162,11 @@ local function punch_filter(data, filtpos, filtnode, msg)
 				filtmeta:set_int("slotseq_mode", slotseq_mode)
 			end
 
-			if exact_match ~= nil then
-				filtmeta:set_int("exmatch_mode", exact_match)
+			if exmatch_mode ~= nil then
+				filtmeta:set_int("exmatch_mode", exmatch_mode)
 			end
 
-			if slotseq_mode ~= nil or exact_match ~= nil then
+			if slotseq_mode ~= nil or exmatch_mode ~= nil then
 				set_filter_formspec(data, filtmeta)
 			end
 
@@ -313,17 +204,136 @@ local function punch_filter(data, filtpos, filtnode, msg)
 		slotseq_mode = filtmeta:get_int("slotseq_mode")
 	end
 
-	if exact_match == nil then
-		exact_match = filtmeta:get_int("exmatch_mode")
+	if exmatch_mode == nil then
+		exmatch_mode = filtmeta:get_int("exmatch_mode")
 	end
 
-	local frommeta = minetest.get_meta(frompos)
-	local frominv = frommeta:get_inventory()
+	local frominv
+	if fromtube.return_input_invref then
+		frominv = fromtube.return_input_invref(frompos, fromnode, dir, owner)
+		if not frominv then
+			return
+		end
+	else
+		local frommeta = minetest.get_meta(frompos)
+		frominv = frommeta:get_inventory()
+	end
 	if fromtube.before_filter then fromtube.before_filter(frompos) end
+
+	local function grabAndFire(frominvname, filterfor)
+		local sposes = {}
+		if not frominvname or not frominv:get_list(frominvname) then return end
+		for spos,stack in ipairs(frominv:get_list(frominvname)) do
+			local matches
+			if filterfor == "" then
+				matches = stack:get_name() ~= ""
+			else
+				local fname = filterfor.name
+				local fgroup = filterfor.group
+				local fwear = filterfor.wear
+				local fmetadata = filterfor.metadata
+				matches = (not fname                                             -- If there's a name filter,
+				           or stack:get_name() == fname)                         --  it must match.
+
+				          and (not fgroup                                        -- If there's a group filter,
+				               or (type(fgroup) == "string"                      --  it must be a string
+				                   and minetest.get_item_group(                  --  and it must match.
+				                                stack:get_name(), fgroup) ~= 0))
+
+				          and (not fwear                                         -- If there's a wear filter:
+				               or (type(fwear) == "number"                       --  If it's a number,
+				                   and stack:get_wear() == fwear)                --   it must match.
+				               or (type(fwear) == "table"                        --  If it's a table:
+				                   and (not fwear[1]                             --   If there's a lower bound,
+				                        or (type(fwear[1]) == "number"           --    it must be a number
+				                            and fwear[1] <= stack:get_wear()))   --    and it must be <= the actual wear.
+				                   and (not fwear[2]                             --   If there's an upper bound
+				                        or (type(fwear[2]) == "number"           --    it must be a number
+				                            and stack:get_wear() < fwear[2]))))  --    and it must be > the actual wear.
+				                                                                 --  If the wear filter is of any other type, fail.
+
+				          and (not fmetadata                                     -- If there's a metadata filter,
+				               or (type(fmetadata) == "string"                   --  it must be a string
+				                   and stack:get_metadata() == fmetadata))       --  and it must match.
+			end
+			if matches then table.insert(sposes, spos) end
+		end
+		if #sposes == 0 then return false end
+		if slotseq_mode == 1 then
+			for i = #sposes, 2, -1 do
+				local j = math.random(i)
+				local t = sposes[j]
+				sposes[j] = sposes[i]
+				sposes[i] = t
+			end
+		elseif slotseq_mode == 2 then
+			local headpos = filtmeta:get_int("slotseq_index")
+			table.sort(sposes, function (a, b)
+				if a >= headpos then
+					if b < headpos then return true end
+				else
+					if b >= headpos then return false end
+				end
+				return a < b
+			end)
+		end
+		for _, spos in ipairs(sposes) do
+			local stack = frominv:get_stack(frominvname, spos)
+			local doRemove = stack:get_count()
+			if fromtube.can_remove then
+				doRemove = fromtube.can_remove(frompos, fromnode, stack, dir, frominvname, spos)
+			elseif fromdef.allow_metadata_inventory_take then
+				doRemove = fromdef.allow_metadata_inventory_take(frompos, frominvname,spos, stack, fakePlayer)
+			end
+			-- stupid lack of continue statements grumble
+			if doRemove > 0 then
+				if slotseq_mode == 2 then
+					local nextpos = spos + 1
+					if nextpos > frominv:get_size(frominvname) then
+						nextpos = 1
+					end
+					filtmeta:set_int("slotseq_index", nextpos)
+					set_filter_infotext(data, filtmeta)
+				end
+				local item
+				local count
+				if data.stackwise then
+					count = math.min(stack:get_count(), doRemove)
+					if filterfor.count and (filterfor.count > 1 or data.digiline) then
+						if exmatch_mode ~= 0 and filterfor.count > count then
+							return false -- not enough, fail
+						else
+							-- limit quantity to filter amount
+							count = math.min(filterfor.count, count)
+						end
+					end
+				else
+					count = 1
+				end
+				if fromtube.remove_items then
+					-- it could be the entire stack...
+					item = fromtube.remove_items(frompos, fromnode, stack, dir, count, frominvname, spos)
+				else
+					item = stack:take_item(count)
+					frominv:set_stack(frominvname, spos, stack)
+					if fromdef.on_metadata_inventory_take then
+						fromdef.on_metadata_inventory_take(frompos, frominvname, spos, item, fakePlayer)
+					end
+				end
+				local pos = vector.add(frompos, vector.multiply(dir, 1.4))
+				local start_pos = vector.add(frompos, dir)
+				pipeworks.tube_inject_item(pos, start_pos, dir, item,
+					fakePlayer:get_player_name())
+				return true -- only fire one item, please
+			end
+		end
+		return false
+	end
+
 	for _, frominvname in ipairs(type(fromtube.input_inventory) == "table" and fromtube.input_inventory or {fromtube.input_inventory}) do
 		local done = false
 		for _, filterfor in ipairs(filters) do
-			if grabAndFire(data, slotseq_mode, exact_match, filtmeta, frominv, frominvname, frompos, fromnode, filterfor, fromtube, fromdef, dir, fakePlayer, data.stackwise, data.digiline) then
+			if grabAndFire(frominvname, filterfor) then
 				done = true
 				break
 			end
@@ -336,23 +346,23 @@ end
 for _, data in ipairs({
 	{
 		name = "filter",
-		wise_desc = "Itemwise",
+		wise_desc = S("Itemwise"),
 		stackwise = false,
 	},
 	{
 		name = "mese_filter",
-		wise_desc = "Stackwise",
+		wise_desc = S("Stackwise"),
 		stackwise = true,
 	},
 	{ -- register even if no digilines
 		name = "digiline_filter",
-		wise_desc = "Digiline",
+		wise_desc = S("Digiline"),
 		stackwise = true,
 		digiline = true,
 	},
 }) do
 	local node = {
-		description = data.wise_desc.." Filter-Injector",
+		description = S("@1 Filter-Injector", data.wise_desc),
 		tiles = {
 			"pipeworks_"..data.name.."_top.png",
 			"pipeworks_"..data.name.."_top.png",
@@ -377,13 +387,24 @@ for _, data in ipairs({
 			pipeworks.after_place(pos)
 		end,
 		after_dig_node = pipeworks.after_dig,
+		on_rotate = pipeworks.on_rotate,
 		allow_metadata_inventory_put = function(pos, listname, index, stack, player)
-			if not pipeworks.may_configure(pos, player) then return 0 end
-			return stack:get_count()
+			if not pipeworks.may_configure(pos, player) then
+				return 0
+			end
+			local inv = minetest.get_meta(pos):get_inventory()
+			inv:set_stack("main", index, stack)
+			return 0
 		end,
 		allow_metadata_inventory_take = function(pos, listname, index, stack, player)
-			if not pipeworks.may_configure(pos, player) then return 0 end
-			return stack:get_count()
+			if not pipeworks.may_configure(pos, player) then
+				return 0
+			end
+			local inv = minetest.get_meta(pos):get_inventory()
+			local fake_stack = inv:get_stack("main", index)
+			fake_stack:take_item(stack:get_count())
+			inv:set_stack("main", index, fake_stack)
+			return 0
 		end,
 		allow_metadata_inventory_move = function(pos, from_list, from_index, to_list, to_index, count, player)
 			if not pipeworks.may_configure(pos, player) then return 0 end
@@ -456,18 +477,18 @@ end
 minetest.register_craft( {
 	output = "pipeworks:filter 2",
 	recipe = {
-	        { "default:steel_ingot", "default:steel_ingot", "homedecor:plastic_sheeting" },
-	        { "group:stick", "default:mese_crystal", "homedecor:plastic_sheeting" },
-	        { "default:steel_ingot", "default:steel_ingot", "homedecor:plastic_sheeting" }
+	        { "default:steel_ingot", "default:steel_ingot", "basic_materials:plastic_sheet" },
+	        { "group:stick", "default:mese_crystal", "basic_materials:plastic_sheet" },
+	        { "default:steel_ingot", "default:steel_ingot", "basic_materials:plastic_sheet" }
 	},
 })
 
 minetest.register_craft( {
 	output = "pipeworks:mese_filter 2",
 	recipe = {
-	        { "default:steel_ingot", "default:steel_ingot", "homedecor:plastic_sheeting" },
-	        { "group:stick", "default:mese", "homedecor:plastic_sheeting" },
-	        { "default:steel_ingot", "default:steel_ingot", "homedecor:plastic_sheeting" }
+	        { "default:steel_ingot", "default:steel_ingot", "basic_materials:plastic_sheet" },
+	        { "group:stick", "default:mese", "basic_materials:plastic_sheet" },
+	        { "default:steel_ingot", "default:steel_ingot", "basic_materials:plastic_sheet" }
 	},
 })
 
@@ -475,9 +496,70 @@ if minetest.get_modpath("digilines") then
 	minetest.register_craft( {
 		output = "pipeworks:digiline_filter 2",
 		recipe = {
-			{ "default:steel_ingot", "default:steel_ingot", "homedecor:plastic_sheeting" },
-			{ "group:stick", "digilines:wire_std_00000000", "homedecor:plastic_sheeting" },
-			{ "default:steel_ingot", "default:steel_ingot", "homedecor:plastic_sheeting" }
+			{ "default:steel_ingot", "default:steel_ingot", "basic_materials:plastic_sheet" },
+			{ "group:stick", "digilines:wire_std_00000000", "basic_materials:plastic_sheet" },
+			{ "default:steel_ingot", "default:steel_ingot", "basic_materials:plastic_sheet" }
 		},
 	})
 end
+
+--[[
+In the past the filter-injectors had real items in their inventories. This code
+puts them to the input to the filter-injector if possible. Else the items are
+dropped.
+]]
+local function put_to_inputinv(pos, node, filtmeta, list)
+	local dir = pipeworks.facedir_to_right_dir(node.param2)
+	local frompos = vector.subtract(pos, dir)
+	local fromnode = minetest.get_node(frompos)
+	local fromdef = minetest.registered_nodes[fromnode.name]
+	if not fromdef or not fromdef.tube then
+		return
+	end
+	local fromtube = fromdef.tube
+	local frominv
+	if fromtube.return_input_invref then
+		local owner = filtmeta:get_string("owner")
+		frominv = fromtube.return_input_invref(frompos, fromnode, dir, owner)
+		if not frominv then
+			return
+		end
+	else
+		frominv = minetest.get_meta(frompos):get_inventory()
+	end
+	local listname = type(fromtube.input_inventory) == "table" and
+			fromtube.input_inventory[1] or fromtube.input_inventory
+	if not listname then
+		return
+	end
+	for i = 1, #list do
+		local item = list[i]
+		if not item:is_empty() then
+			local leftover = frominv:add_item(listname, item)
+			if not leftover:is_empty() then
+				minetest.add_item(pos, leftover)
+			end
+		end
+	end
+	return true
+end
+minetest.register_lbm({
+	label = "Give back items of old filters that had real inventories",
+	name = "pipeworks:give_back_old_filter_items",
+	nodenames = {"pipeworks:filter", "pipeworks:mese_filter"},
+	run_at_every_load = false,
+	action = function(pos, node)
+		local meta = minetest.get_meta(pos)
+		local list = meta:get_inventory():get_list("main")
+		if put_to_inputinv(pos, node, meta, list) then
+			return
+		end
+		pos.y = pos.y + 1
+		for i = 1, #list do
+			local item = list[i]
+			if not item:is_empty() then
+				minetest.add_item(pos, item)
+			end
+		end
+	end,
+})

flowing_logic.lua

@@ -44,7 +44,8 @@ pipeworks.check_for_inflows = function(pos,node)
 				source = minetest.get_meta(coords[i]):get_string("source")
 				if source == minetest.pos_to_string(pos) then break end
 			end
-			if string.find(name, "valve") or string.find(name, "sensor") then
+			if string.find(name, "valve") or string.find(name, "sensor")
+			  or string.find(name, "straight_pipe") or string.find(name, "panel") then
 
 				if ((i == 3 or i == 4) and minetest.facedir_to_dir(testnode.param2).x ~= 0)
 				  or ((i == 5 or i == 6) and minetest.facedir_to_dir(testnode.param2).z ~= 0)
@@ -59,8 +60,8 @@ pipeworks.check_for_inflows = function(pos,node)
 			end
 		end
 	end
-	if newnode then 
-		minetest.add_node(pos,{name=newnode, param2 = node.param2}) 
+	if newnode then
+		minetest.add_node(pos,{name=newnode, param2 = node.param2})
 		minetest.get_meta(pos):set_string("source",minetest.pos_to_string(source))
 	end
 end
@@ -74,15 +75,15 @@ pipeworks.check_sources = function(pos,node)
 		newnode = string.gsub(node.name,"loaded","empty")
 	end
 
-	if newnode then 
-		minetest.add_node(pos,{name=newnode, param2 = node.param2}) 
+	if newnode then
+		minetest.add_node(pos,{name=newnode, param2 = node.param2})
 		minetest.get_meta(pos):set_string("source","")
 	end
 end
 
 pipeworks.spigot_check = function(pos, node)
 	local belowname = minetest.get_node({x=pos.x,y=pos.y-1,z=pos.z}).name
-	if belowname and (belowname == "air" or belowname == "default:water_flowing" or belowname == "default:water_source") then 
+	if belowname and (belowname == "air" or belowname == "default:water_flowing" or belowname == "default:water_source") then
 		local spigotname = minetest.get_node(pos).name
 		local fdir=node.param2 % 4
 		local check = {
@@ -112,7 +113,7 @@ end
 
 pipeworks.fountainhead_check = function(pos, node)
 	local abovename = minetest.get_node({x=pos.x,y=pos.y+1,z=pos.z}).name
-	if abovename and (abovename == "air" or abovename == "default:water_flowing" or abovename == "default:water_source") then 
+	if abovename and (abovename == "air" or abovename == "default:water_flowing" or abovename == "default:water_source") then
 		local fountainhead_name = minetest.get_node(pos).name
 		local near_node = minetest.get_node({x=pos.x,y=pos.y-1,z=pos.z})
 		if near_node and string.find(near_node.name, "_loaded") then

init.lua

@@ -3,18 +3,14 @@
 -- This mod supplies various steel pipes and plastic pneumatic tubes
 -- and devices that they can connect to.
 --
--- License: WTFPL
---
 
 pipeworks = {}
 
-local DEBUG = false
-
 pipeworks.worldpath = minetest.get_worldpath()
 pipeworks.modpath = minetest.get_modpath("pipeworks")
+local S = minetest.get_translator("pipeworks")
 
 dofile(pipeworks.modpath.."/default_settings.lua")
-
 -- Read the external config file if it exists.
 local worldsettingspath = pipeworks.worldpath.."/pipeworks_settings.txt"
 local worldsettingsfile = io.open(worldsettingspath, "r")
@@ -22,6 +18,9 @@ if worldsettingsfile then
 	worldsettingsfile:close()
 	dofile(worldsettingspath)
 end
+if pipeworks.toggles.pipe_mode == "pressure" then
+	minetest.log("warning", "pipeworks pressure logic mode comes with caveats and differences in behaviour, you have been warned!")
+end
 
 -- Random variables
 
@@ -38,13 +37,14 @@ pipeworks.rules_all = {{x=0, y=0, z=1},{x=0, y=0, z=-1},{x=1, y=0, z=0},{x=-1, y
 		{x=0, y=1, z=0}, {x=0, y=-1, z=0}}
 
 pipeworks.mesecons_rules={{x=0,y=0,z=1},{x=0,y=0,z=-1},{x=1,y=0,z=0},{x=-1,y=0,z=0},{x=0,y=1,z=0},{x=0,y=-1,z=0}}
+pipeworks.digilines_rules={{x=0,y=0,z=1},{x=0,y=0,z=-1},{x=1,y=0,z=0},{x=-1,y=0,z=0},{x=0,y=1,z=0},{x=0,y=-1,z=0}}
 
 pipeworks.liquid_texture = "default_water.png"
 
 pipeworks.button_off   = {text="", texture="pipeworks_button_off.png", addopts="false;false;pipeworks_button_interm.png"}
 pipeworks.button_on    = {text="", texture="pipeworks_button_on.png",  addopts="false;false;pipeworks_button_interm.png"}
 pipeworks.button_base  = "image_button[0,4.3;1,0.6"
-pipeworks.button_label = "label[0.9,4.31;Allow splitting incoming stacks from tubes]"
+pipeworks.button_label = "label[0.9,4.31;"..S("Allow splitting incoming stacks from tubes").."]"
 
 -- Helper functions
 
@@ -69,8 +69,8 @@ function pipeworks.may_configure(pos, player)
 	local meta = minetest.get_meta(pos)
 	local owner = meta:get_string("owner")
 
-	if owner ~= "" then -- wielders and filters
-		return owner == name
+	if owner ~= "" and owner == name then -- wielders and filters
+		return true
 	end
 	return not minetest.is_protected(pos, name)
 end
@@ -89,9 +89,22 @@ function pipeworks.replace_name(tbl,tr,name)
 	return ntbl
 end
 
+pipeworks.logger = function(msg)
+	print("[pipeworks] "..msg)
+end
+
 -------------------------------------------
 -- Load the various other parts of the mod
 
+-- early auto-detection for finite water mode if not explicitly disabled
+if pipeworks.toggles.finite_water == nil then
+	dofile(pipeworks.modpath.."/autodetect-finite-water.lua")
+end
+
+if minetest.get_modpath("signs_lib") then
+	dofile(pipeworks.modpath.."/signs_compat.lua")
+end
+
 dofile(pipeworks.modpath.."/common.lua")
 dofile(pipeworks.modpath.."/models.lua")
 dofile(pipeworks.modpath.."/autoplace_pipes.lua")
@@ -110,6 +123,16 @@ dofile(pipeworks.modpath.."/filter-injector.lua")
 dofile(pipeworks.modpath.."/trashcan.lua")
 dofile(pipeworks.modpath.."/wielder.lua")
 
+local logicdir = "/pressure_logic/"
+
+-- note that even with these files the new flow logic is not yet default.
+-- registration will take place but no actual ABMs/node logic will be installed,
+-- unless the toggle flag is specifically enabled in the per-world settings flag.
+dofile(pipeworks.modpath..logicdir.."flowable_node_registry.lua")
+dofile(pipeworks.modpath..logicdir.."abms.lua")
+dofile(pipeworks.modpath..logicdir.."abm_register.lua")
+dofile(pipeworks.modpath..logicdir.."flowable_node_registry_install.lua")
+
 if pipeworks.enable_pipes then dofile(pipeworks.modpath.."/pipes.lua") end
 if pipeworks.enable_teleport_tube then dofile(pipeworks.modpath.."/teleport_tube.lua") end
 if pipeworks.enable_pipe_devices then dofile(pipeworks.modpath.."/devices.lua") end
@@ -118,8 +141,11 @@ if pipeworks.enable_redefines then
 	dofile(pipeworks.modpath.."/compat-furnaces.lua")
 end
 if pipeworks.enable_autocrafter then dofile(pipeworks.modpath.."/autocrafter.lua") end
+if pipeworks.enable_lua_tube and
+		(minetest.get_modpath("mesecons") or minetest.get_modpath("digilines")) then
+	dofile(pipeworks.modpath.."/lua_tube.lua")
+end
 
 minetest.register_alias("pipeworks:pipe", "pipeworks:pipe_110000_empty")
 
-print("Pipeworks loaded!")
-
+minetest.log("info", "Pipeworks loaded!")

item_transport.lua

@@ -7,13 +7,14 @@ function pipeworks.tube_item(pos, item)
 	error("obsolete pipeworks.tube_item() called; change caller to use pipeworks.tube_inject_item() instead")
 end
 
-function pipeworks.tube_inject_item(pos, start_pos, velocity, item)
+function pipeworks.tube_inject_item(pos, start_pos, velocity, item, owner)
 	-- Take item in any format
 	local stack = ItemStack(item)
 	local obj = luaentity.add_entity(pos, "pipeworks:tubed_item")
 	obj:set_item(stack:to_string())
 	obj.start_pos = vector.new(start_pos)
-	obj:setvelocity(velocity)
+	obj:set_velocity(velocity)
+	obj.owner = owner
 	--obj:set_color("red") -- todo: this is test-only code
 	return obj
 end
@@ -24,7 +25,7 @@ end
 -- both optional w/ sensible defaults and fallback to normal allow_* function
 -- XXX: possibly change insert_object to insert_item
 
-local adjlist={{x=0,y=0,z=1},{x=0,y=0,z=-1},{x=0,y=1,z=0},{x=0,y=-1,z=0},{x=1,y=0,z=0},{x=-1,y=0,z=0}}
+local default_adjlist={{x=0,y=0,z=1},{x=0,y=0,z=-1},{x=0,y=1,z=0},{x=0,y=-1,z=0},{x=1,y=0,z=0},{x=-1,y=0,z=0}}
 
 function pipeworks.notvel(tbl, vel)
 	local tbl2={}
@@ -41,7 +42,7 @@ minetest.register_globalstep(function(dtime)
 		return
 	end
 	tube_item_count = {}
-	for id, entity in pairs(luaentity.entities) do
+	for _, entity in pairs(luaentity.entities) do
 		if entity.name == "pipeworks:tubed_item" then
 			local h = minetest.hash_node_position(vector.round(entity._pos))
 			tube_item_count[h] = (tube_item_count[h] or 0) + 1
@@ -49,12 +50,96 @@ minetest.register_globalstep(function(dtime)
 	end
 end)
 
-local function go_next(pos, velocity, stack)
+
+
+-- tube overload mechanism:
+-- when the tube's item count (tracked in the above tube_item_count table)
+-- exceeds the limit configured per tube, replace it with a broken one.
+local crunch_tube = function(pos, cnode, cmeta)
+	if enable_max_limit then
+		local h = minetest.hash_node_position(pos)
+		local itemcount = tube_item_count[h] or 0
+		if itemcount > max_tube_limit then
+			cmeta:set_string("the_tube_was", minetest.serialize(cnode))
+			pipeworks.logger("Warning - a tube at "..minetest.pos_to_string(pos).." broke due to too many items ("..itemcount..")")
+			minetest.swap_node(pos, {name = "pipeworks:broken_tube_1"})
+			pipeworks.scan_for_tube_objects(pos)
+		end
+	end
+end
+
+
+
+-- compatibility behaviour for the existing can_go() callbacks,
+-- which can only specify a list of possible positions.
+local function go_next_compat(pos, cnode, cmeta, cycledir, vel, stack, owner)
 	local next_positions = {}
 	local max_priority = 0
+	local can_go
+
+	if minetest.registered_nodes[cnode.name] and minetest.registered_nodes[cnode.name].tube and minetest.registered_nodes[cnode.name].tube.can_go then
+		can_go = minetest.registered_nodes[cnode.name].tube.can_go(pos, cnode, vel, stack)
+	else
+		local adjlist_string = minetest.get_meta(pos):get_string("adjlist")
+		local adjlist = minetest.deserialize(adjlist_string) or default_adjlist -- backward compat: if not found, use old behavior: all directions
+
+		can_go = pipeworks.notvel(adjlist, vel)
+	end
+	-- can_go() is expected to return an array-like table of candidate offsets.
+	-- for each one, look at the node at that offset and determine if it can accept the item.
+	-- also note the prioritisation:
+	-- if any tube is found with a greater priority than previously discovered,
+	-- then the valid positions are reset and and subsequent positions under this are skipped.
+	-- this has the effect of allowing only equal priorities to co-exist.
+	for _, vect in ipairs(can_go) do
+		local npos = vector.add(pos, vect)
+		pipeworks.load_position(npos)
+		local node = minetest.get_node(npos)
+		local reg_node = minetest.registered_nodes[node.name]
+		if reg_node then
+			local tube_def = reg_node.tube
+			local tubedevice = minetest.get_item_group(node.name, "tubedevice")
+			local tube_priority = (tube_def and tube_def.priority) or 100
+			if tubedevice > 0 and tube_priority >= max_priority then
+				if not tube_def or not tube_def.can_insert or
+						tube_def.can_insert(npos, node, stack, vect, owner) then
+					if tube_priority > max_priority then
+						max_priority = tube_priority
+						next_positions = {}
+					end
+					next_positions[#next_positions + 1] = {pos = npos, vect = vect}
+				end
+			end
+		end
+	end
+
+	-- indicate not found if no valid rules were picked up,
+	-- and don't change the counter.
+	if not next_positions[1] then
+		return cycledir, false, nil, nil
+	end
+
+	-- otherwise rotate to the next output direction and return that
+	local n = (cycledir % (#next_positions)) + 1
+	local new_velocity = vector.multiply(next_positions[n].vect, vel.speed)
+	return n, true, new_velocity, nil
+end
+
+
+
+
+-- function called by the on_step callback of the pipeworks tube luaentity.
+-- the routine is passed the current node position, velocity, itemstack,
+-- and owner name.
+-- returns three values:
+-- * a boolean "found destination" status;
+-- * a new velocity vector that the tubed item should use, or nil if not found;
+-- * a "multi-mode" data table (or nil if N/A) where a stack was split apart.
+--	if this is not nil, the luaentity spawns new tubed items for each new fragment stack,
+--	then deletes itself (i.e. the original item stack).
+local function go_next(pos, velocity, stack, owner)
 	local cnode = minetest.get_node(pos)
 	local cmeta = minetest.get_meta(pos)
-	local can_go
 	local speed = math.abs(velocity.x + velocity.y + velocity.z)
 	if speed == 0 then
 		speed = 1
@@ -68,56 +153,30 @@ local function go_next(pos, velocity, stack)
 		speed = 1
 	end
 	vel.speed = speed
-	if minetest.registered_nodes[cnode.name] and minetest.registered_nodes[cnode.name].tube and minetest.registered_nodes[cnode.name].tube.can_go then
-		can_go = minetest.registered_nodes[cnode.name].tube.can_go(pos, cnode, vel, stack)
-	else
-		can_go = pipeworks.notvel(adjlist, vel)
-	end
-	for _, vect in ipairs(can_go) do
-		local npos = vector.add(pos, vect)
-		pipeworks.load_position(npos)
-		local node = minetest.get_node(npos)
-		local reg_node = minetest.registered_nodes[node.name]
-		if reg_node then
-			local tube_def = reg_node.tube
-			local tubedevice = minetest.get_item_group(node.name, "tubedevice")
-			local tube_priority = (tube_def and tube_def.priority) or 100
-			if tubedevice > 0 and tube_priority >= max_priority then
-				if not tube_def or not tube_def.can_insert or
-						tube_def.can_insert(npos, node, stack, vect) then
-					if tube_priority > max_priority then
-						max_priority = tube_priority
-						next_positions = {}
-					end
-					next_positions[#next_positions + 1] = {pos = npos, vect = vect}
-				end
-			end
-		end
-	end
 
-	if enable_max_limit then
-		local h = minetest.hash_node_position(pos)
-		local itemcount = tube_item_count[h] or 0
-		if itemcount > max_tube_limit then
-			cmeta:set_string("the_tube_was", minetest.serialize(cnode))
-			print("[Pipeworks] Warning - a tube at "..minetest.pos_to_string(pos).." broke due to too many items ("..itemcount..")")
-			minetest.swap_node(pos, {name = "pipeworks:broken_tube_1"})
-			pipeworks.scan_for_tube_objects(pos)
-		end
-	end
+	crunch_tube(pos, cnode, cmeta)
+	-- cycling of outputs:
+	-- an integer counter is kept in each pipe's metadata,
+	-- which allows tracking which output was previously chosen.
+	-- note reliance on get_int returning 0 for uninitialised.
+	local cycledir = cmeta:get_int("tubedir")
 
-	if not next_positions[1] then
-		return false, nil
-	end
+	-- pulled out and factored out into go_next_compat() above.
+	-- n is the new value of the cycle counter.
+	-- XXX: this probably needs cleaning up after being split out,
+	-- seven args is a bit too many
+	local n, found, new_velocity, multimode = go_next_compat(pos, cnode, cmeta, cycledir, vel, stack, owner)
 
-	local n = (cmeta:get_int("tubedir") % (#next_positions)) + 1
+	-- if not using output cycling,
+	-- don't update the field so it stays the same for the next item.
 	if pipeworks.enable_cyclic_mode then
 		cmeta:set_int("tubedir", n)
 	end
-	local new_velocity = vector.multiply(next_positions[n].vect, vel.speed)
-	return true, new_velocity
+	return found, new_velocity, multimode
 end
 
+
+
 minetest.register_entity("pipeworks:tubed_item", {
 	initial_properties = {
 		hp_max = 1,
@@ -135,6 +194,7 @@ minetest.register_entity("pipeworks:tubed_item", {
 
 	from_data = function(self, itemstring)
 		local stack = ItemStack(itemstring)
+		--[[
 		local itemtable = stack:to_table()
 		local itemname = nil
 		if itemtable then
@@ -146,12 +206,13 @@ minetest.register_entity("pipeworks:tubed_item", {
 			item_texture = minetest.registered_items[itemname].inventory_image
 			item_type = minetest.registered_items[itemname].type
 		end
+		--]]
 		self.object:set_properties({
 			is_visible = true,
 			textures = {stack:get_name()}
 		})
 		local def = stack:get_definition()
-		self.object:setyaw((def and def.type == "node") and 0 or math.pi * 0.25)
+		self.object:set_yaw((def and def.type == "node") and 0 or math.pi * 0.25)
 	end,
 
 	get_staticdata = luaentity.get_staticdata,
@@ -164,7 +225,7 @@ minetest.register_entity("pipeworks:tubed_item", {
 			return
 		end
 		local item = minetest.deserialize(staticdata)
-		pipeworks.tube_inject_item(self.object:getpos(), item.start_pos, item.velocity, item.itemstring)
+		pipeworks.tube_inject_item(self.object:get_pos(), item.start_pos, item.velocity, item.itemstring)
 		self.object:remove()
 	end,
 })
@@ -196,6 +257,12 @@ minetest.register_entity("pipeworks:color_entity", {
 	on_activate = luaentity.on_activate,
 })
 
+-- see below for usage:
+-- determine if go_next returned a multi-mode set.
+local is_multimode = function(v)
+	return (type(v) == "table") and (v.__multimode)
+end
+
 luaentity.register_entity("pipeworks:tubed_item", {
 	itemstring = '',
 	item_entity = nil,
@@ -231,15 +298,15 @@ luaentity.register_entity("pipeworks:tubed_item", {
 	end,
 
 	on_step = function(self, dtime)
-		local pos = self:getpos()
+		local pos = self:get_pos()
 		if self.start_pos == nil then
 			self.start_pos = vector.round(pos)
-			self:setpos(pos)
+			self:set_pos(pos)
 		end
 
 		local stack = ItemStack(self.itemstring)
 
-		local velocity = self:getvelocity()
+		local velocity = self:get_velocity()
 
 		local moved = false
 		local speed = math.abs(velocity.x + velocity.y + velocity.z)
@@ -260,7 +327,7 @@ luaentity.register_entity("pipeworks:tubed_item", {
 		if moved and minetest.get_item_group(node.name, "tubedevice_receiver") == 1 then
 			local leftover
 			if minetest.registered_nodes[node.name].tube and minetest.registered_nodes[node.name].tube.insert_object then
-				leftover = minetest.registered_nodes[node.name].tube.insert_object(self.start_pos, node, stack, vel)
+				leftover = minetest.registered_nodes[node.name].tube.insert_object(self.start_pos, node, stack, vel, self.owner)
 			else
 				leftover = stack
 			end
@@ -269,14 +336,14 @@ luaentity.register_entity("pipeworks:tubed_item", {
 				return
 			end
 			velocity = vector.multiply(velocity, -1)
-			self:setpos(vector.subtract(self.start_pos, vector.multiply(vel, moved_by - 1)))
-			self:setvelocity(velocity)
+			self:set_pos(vector.subtract(self.start_pos, vector.multiply(vel, moved_by - 1)))
+			self:set_velocity(velocity)
 			self:set_item(leftover:to_string())
 			return
 		end
 
 		if moved then
-			local found_next, new_velocity = go_next(self.start_pos, velocity, stack) -- todo: color
+			local found_next, new_velocity, multimode = go_next(self.start_pos, velocity, stack, self.owner) -- todo: color
 			local rev_vel = vector.multiply(velocity, -1)
 			local rev_dir = vector.direction(self.start_pos,vector.add(self.start_pos,rev_vel))
 			local rev_node = minetest.get_node(vector.round(vector.add(self.start_pos,rev_dir)))
@@ -288,20 +355,31 @@ luaentity.register_entity("pipeworks:tubed_item", {
 					-- compatible with Minetest 0.4.13.
 					-- Using item_drop here makes Minetest 0.4.13 crash.
 					local dropped_item = minetest.add_item(self.start_pos, stack)
-					dropped_item:setvelocity(vector.multiply(velocity, 5))
-					self:remove()
+					if dropped_item then
+						dropped_item:set_velocity(vector.multiply(velocity, 5))
+						self:remove()
+					end
 					return
 				else
 					velocity = vector.multiply(velocity, -1)
-					self:setpos(vector.subtract(self.start_pos, vector.multiply(vel, moved_by - 1)))
-					self:setvelocity(velocity)
+					self:set_pos(vector.subtract(self.start_pos, vector.multiply(vel, moved_by - 1)))
+					self:set_velocity(velocity)
 				end
+			elseif is_multimode(multimode) then
+				-- create new stacks according to returned data.
+				local s = self.start_pos
+				for _, split in ipairs(multimode) do
+					pipeworks.tube_inject_item(s, s, split.velocity, split.itemstack, self.owner)
+				end
+				-- remove ourself now the splits are sent
+				self:remove()
+				return
 			end
 
 			if new_velocity and not vector.equals(velocity, new_velocity) then
 				local nvelr = math.abs(new_velocity.x + new_velocity.y + new_velocity.z)
-				self:setpos(vector.add(self.start_pos, vector.multiply(new_velocity, (moved_by - 1) / nvelr)))
-				self:setvelocity(new_velocity)
+				self:set_pos(vector.add(self.start_pos, vector.multiply(new_velocity, (moved_by - 1) / nvelr)))
+				self:set_velocity(new_velocity)
 			end
 		end
 	end
@@ -315,13 +393,13 @@ if minetest.get_modpath("mesecons_mvps") then
 		for _, n in ipairs(moved_nodes) do
 			moved[minetest.hash_node_position(n.oldpos)] = vector.subtract(n.pos, n.oldpos)
 		end
-		for id, entity in pairs(luaentity.entities) do
+		for _, entity in pairs(luaentity.entities) do
 			if entity.name == "pipeworks:tubed_item" then
-				local pos = entity:getpos()
+				local pos = entity:get_pos()
 				local rpos = vector.round(pos)
 				local dir = moved[minetest.hash_node_position(rpos)]
 				if dir then
-					entity:setpos(vector.add(pos, dir))
+					entity:set_pos(vector.add(pos, dir))
 					entity.start_pos = vector.add(entity.start_pos, dir)
 				end
 			end

legacy.lua

@@ -1,5 +1,6 @@
+local S = minetest.get_translator("pipeworks")
 
-if not minetest.get_modpath("auto_tree_tap") and 
+if not minetest.get_modpath("auto_tree_tap") and
   minetest.get_modpath("technic") then
 
 	minetest.register_abm({
@@ -20,7 +21,7 @@ if not minetest.get_modpath("auto_tree_tap") and
 	})
 
 	minetest.register_node(":auto_tree_tap:off", {
-		description = "Auto-Tap",
+		description = S("Auto-Tap"),
 		tiles = {"pipeworks_nodebreaker_top_off.png","pipeworks_nodebreaker_bottom_off.png","pipeworks_nodebreaker_side2_off.png","pipeworks_nodebreaker_side1_off.png",
 			"pipeworks_nodebreaker_back.png","pipeworks_nodebreaker_front_off.png"},
 		is_ground_content = true,
@@ -36,11 +37,11 @@ if not minetest.get_modpath("auto_tree_tap") and
 		end,
 		after_place_node = function (pos, placer)
 			pipeworks.scan_for_tube_objects(pos, placer)
-			local placer_pos = placer:getpos()
-		
+			local placer_pos = placer:get_pos()
+
 			--correct for the player's height
 			if placer:is_player() then placer_pos.y = placer_pos.y + 1.5 end
-		
+
 			--correct for 6d facedir
 			if placer_pos then
 				local dir = {

locale/pipeworks.fr.tr

@@ -0,0 +1,112 @@
+# textdomain: pipeworks
+
+# License: CC-by-SA 4.0
+# Author: Louis Royer <4259825-lroyer@users.noreply.gitlab.com>
+
+## digilines interfacing
+Channel=Canal
+
+## init
+Allow splitting incoming stacks from tubes=Séparer les piles venant des tubes
+
+## autocrafter
+Unknown item=Item inconnu
+unconfigured Autocrafter: unknown recipe=Autocrafteur non-configuré : recette inconnue
+unconfigured Autocrafter=Autocrafteur non-configuré
+'@1' Autocrafter (@2)=Autocrafteur de '@1' (@2)
+Save=Valider
+paused '@1' Autocrafter=Autocrafteur de '@1' en pause
+Autocrafter=Autocrafteur
+
+## compat-furnaces
+Allow splitting incoming material (not fuel) stacks from tubes=Séparer les piles (sauf le carburant) venant des tubes
+
+## decorative tubes
+Airtight steelblock embedded tube=Tube hermétique intégré à un bloc d’acier
+Airtight panel embedded tube=Tube hermétique intégré à un panneau
+
+## devices
+Pump/Intake Module=Module de pompage et d’admission
+Valve=Vanne
+Decorative grating=Grillage décoratif
+Spigot outlet=Sortie de robinet
+Airtight Pipe entry/exit=Extrémité de tube hermétique
+Flow Sensor=Détecteur de débit
+Flow sensor (on)=Détecteur de débit (actif)
+empty=vide
+@1% full=plein à @1 %
+Expansion Tank (@1)=Réservoir d’expansion (@1)
+Fluid Storage Tank (@1)=Réservoir de liquides (@1)
+Fountainhead=Tête de fontaine
+Straight-only Pipe=Tuyau droit
+
+## filter-injector
+(slot #@1 next)=(slot suivant : #@1)
+@1 Filter-Injector=Filtre-injecteur @1
+Sequence slots by Priority=Ordonner par priorité
+Sequence slots Randomly=Ordonner aléatoirement
+Sequence slots by Rotation=Ordonner en rotation
+Exact match - off=Filtrage inactif
+Exact match - on=Filtrage actif
+Prefer item types:=Items à filtrer :
+Itemwise=par item
+Stackwise=par piles d’items
+Digiline=digiline
+
+## legacy
+Auto-Tap=Robinet d’arbre automatique
+
+## pipes
+Pipe Segment=Segment de tuyau
+Pipe Segment (legacy)=Segment de tuyau (obsolète)
+
+
+## routing tubes
+Pneumatic tube segment=Segment de tuyau pneumatique
+Broken Tube=Tuyau cassé
+High Priority Tube Segment=Segment de tuyau haute priorité
+Accelerating Pneumatic Tube Segment=Segment de tuyau pneumatique accélérante
+Crossing Pneumatic Tube Segment=Intersection de tuyau pneumatique
+One way tube=Tuyau unidirectionnel
+
+## signal tubes
+Detecting Pneumatic Tube Segment on=Segment de tuyau pneumatique avec détecteur (actif)
+Detecting Pneumatic Tube Segment=Segment de tuyau pneumatique avec détecteur
+Digiline Detecting Pneumatic Tube Segment=Segment de tuyau pneumatique avec détecteur digiline
+Digiline Detecting Tube=Tuyau avec détecteur digiline
+Conducting Pneumatic Tube Segment=Segment de tuyau pneumatique conducteur
+Conducting Pneumatic Tube Segment on=Segment de tuyau pneumatique conducteur actif
+Digiline Conducting Pneumatic Tube Segment=Segment de tuyau pneumatique conducteur digiline
+Mesecon and Digiline Conducting Pneumatic Tube Segment=Segment de tuyau pneumatique conducteur mesecon et digiline
+Mesecon and Digiline Conducting Pneumatic Tube Segment on=Segment de tuyau pneumatique conducteur mesecon et digiline (actif)
+
+## sorting tubes
+Sorting Pneumatic Tube Segment=Segment de tuyau pneumatique triant
+Sorting pneumatic tube=Tuyau pneumatique triant
+
+## teleport tube
+Receive=Reception
+channels are public by default=Les canaux sont publics par défaut
+use <player>:<channel> for fully private channels=Utilisez <joueur>:<canal> pour un canal entièrement privé
+use <player>;<channel> for private receivers=Utilisez <joueur>;<canal> pour une réception privée
+Teleporting Pneumatic Tube Segment=Segment de tuyau pneumatique téléporteur
+unconfigured Teleportation Tube=Tuyau téléporteur non-configuré
+Sorry, channel '@1' is reserved for exclusive use by @2=Désolé, le canal '@1' est réservé exclusivement à l’utilisateur @2.
+Sorry, receiving from channel '@1' is reserved for @2=Désolé, la réception depuis le canal '@1' est réservée pour @2.
+Teleportation Tube @1 on '@2'=Tuyau de téléportation @1 sur '@2'
+
+## trashcan
+Trash Can=Poubelle
+
+## tube registration
+Pneumatic tube segment (legacy)=Segment de tuyau pneumatique (obsolète)
+
+## vacuum tubes
+Vacuuming Pneumatic Tube Segment=Segment de tuyau pneumatique aspirant
+Adjustable Vacuuming Pneumatic Tube Segment=Segment de tuyau pneumatique aspirant réglable
+Adjustable Vacuuming Pneumatic Tube Segment (@1m)=Segment de tuyau pneumatique aspirant réglable (@1 m)
+
+## wielder
+Node Breaker=Casseur de blocs
+Deployer=Poseur de blocs
+Dispenser=Distributeur

locale/pipeworks.zh_CN.tr

@@ -0,0 +1,110 @@
+# textdomain: pipeworks
+# License: CC-by-SA 4.0
+# Author: pevernow <3450354617@qq.com>
+
+## digilines interfacing
+Channel=频道
+
+## init
+Allow splitting incoming stacks from tubes=允许从管道中拆分传入堆栈
+
+## autocrafter
+Unknown item=通道
+unconfigured Autocrafter: unknown recipe=未配置的自动工作台: 未知配方
+unconfigured Autocrafter=未配置的自动工作台
+'@1' Autocrafter (@2)=自动工作台 '@1' (@2)
+Save=保存
+paused '@1' Autocrafter=暂停的自动工作台
+Autocrafter=自动工作台
+
+## compat-furnaces
+Allow splitting incoming material (not fuel) stacks from tubes=允许从管子中分离进来的材料（不是燃料）堆
+
+## decorative tubes
+Airtight steelblock embedded tube=密封嵌入式铁块管道
+Airtight panel embedded tube=密封嵌入式片状管道
+
+## devices
+Pump/Intake Module=泵/进气模块
+Valve=阀门
+Decorative grating=Decorative grating
+Spigot outlet=龙头
+Airtight Pipe entry/exit=密闭管进/出
+Flow Sensor=流量传感器
+Flow sensor (on)=流量传感器（上）
+empty=空的
+@1% full=满的@1 %
+Expansion Tank (@1)=扩展水箱 (@1)
+Fluid Storage Tank (@1)=储液罐 (@1)
+Fountainhead=源泉
+Straight-only Pipe=直管
+## filter-injector
+(slot #@1 next)=(下一个插槽 : #@1)
+@1 Filter-Injector=@1取物器
+Sequence slots by Priority=优先顺序排列
+Sequence slots Randomly=随机排列时隙
+Sequence slots by Rotation=旋转顺序槽
+Exact match - off=完全匹配-关闭
+Exact match - on=完全匹配-开启
+Prefer item types:=偏好物品类型 :
+Itemwise=逐项
+Stackwise=堆叠方式
+Digiline=Digiline
+
+## legacy
+Auto-Tap=自动轴阀
+
+## pipes
+Pipe Segment=管道
+Pipe Segment (legacy)=管道（旧版）
+
+
+## routing tubes
+Pneumatic tube segment=普通管道
+Broken Tube=断管
+High Priority Tube Segment=高优先级管段
+Accelerating Pneumatic Tube Segment=加速管道
+Crossing Pneumatic Tube Segment=定向管道
+One way tube=单向管
+
+## signal tubes
+Detecting Pneumatic Tube Segment on=检测管道（运行中）
+Detecting Pneumatic Tube Segment=检测管道
+Digiline Detecting Pneumatic Tube Segment=Digiline检测管道
+Digiline Detecting Tube=Digiline检测管
+Conducting Pneumatic Tube Segment=传导管道
+Conducting Pneumatic Tube Segment on=传导管道（运行中）
+Digiline Conducting Pneumatic Tube Segment=Digiline传导式气动管道
+Mesecon and Digiline Conducting Pneumatic Tube Segment=Mesecon和Digiline传导管道
+Mesecon and Digiline Conducting Pneumatic Tube Segment on=Mesecon和Digiline传导管道（运行中）
+
+## sorting tubes
+Sorting Pneumatic Tube Segment=分类管道
+Sorting pneumatic tube=分类管道
+
+## teleport tube
+Receive=接收
+channels are public by default=频道默认为公开
+use <player>:<channel> for fully private channels=将<player>:<channel>用于完全私人的频道
+use <player>;<channel> for private receivers=使用<player>;<channel>作为私人接收器
+Teleporting Pneumatic Tube Segment=传送管道
+unconfigured Teleportation Tube=未配置的传送管道
+Sorry, channel '@1' is reserved for exclusive use by @2=抱歉，频道‘@1’保留供‘@2’专用
+Sorry, receiving from channel '@1' is reserved for @2=抱歉，从频道'@1'接收的内容已保留给'@2'
+Teleportation Tube @1 on '@2'=传送管'@1'在'@2'上
+
+## trashcan
+Trash Can=垃圾箱
+
+## tube registration
+Pneumatic tube segment (legacy)=普通管道（旧式）
+
+## vacuum tubes
+Vacuuming Pneumatic Tube Segment=拾取管道
+Adjustable Vacuuming Pneumatic Tube Segment=高级拾取管道
+Adjustable Vacuuming Pneumatic Tube Segment (@1m)=高级拾取管道(@1m)
+
+## wielder
+Node Breaker=方块破坏器
+Deployer=放置器
+Dispenser=投掷器

locale/template.txt

@@ -0,0 +1,112 @@
+# textdomain: pipeworks
+
+# License: CC-by-SA 4.0
+# Author:
+
+## digilines interfacing
+Channel=
+
+## init
+Allow splitting incoming stacks from tubes=
+
+## autocrafter
+Unknown item=
+unconfigured Autocrafter: unknown recipe=
+unconfigured Autocrafter=
+'@1' Autocrafter (@2)=
+Save=
+paused '@1' Autocrafter=
+Autocrafter=
+
+## compat-furnaces
+Allow splitting incoming material (not fuel) stacks from tubes=
+
+## decorative tubes
+Airtight steelblock embedded tube=
+Airtight panel embedded tube=
+
+## devices
+Pump/Intake Module=
+Valve=
+Decorative grating=
+Spigot outlet=
+Airtight Pipe entry/exit=
+Flow Sensor=
+Flow sensor (on)=
+empty=
+@1% full=
+Expansion Tank (@1)=
+Fluid Storage Tank (@1)=
+Fountainhead=
+Straight-only Pipe=
+
+## filter-injector
+(slot #@1 next)=
+@1 Filter-Injector=
+Sequence slots by Priority=
+Sequence slots Randomly=
+Sequence slots by Rotation=
+Exact match - off=
+Exact match - on=
+Prefer item types:=
+Itemwise=
+Stackwise=
+Digiline=
+
+## legacy
+Auto-Tap=
+
+## pipes
+Pipe Segment=
+Pipe Segment (legacy)=
+
+
+## routing tubes
+Pneumatic tube segment=
+Broken Tube=
+High Priority Tube Segment=
+Accelerating Pneumatic Tube Segment=
+Crossing Pneumatic Tube Segment=
+One way tube=
+
+## signal tubes
+Detecting Pneumatic Tube Segment on=
+Detecting Pneumatic Tube Segment=
+Digiline Detecting Pneumatic Tube Segment=
+Digiline Detecting Tube=
+Conducting Pneumatic Tube Segment=
+Conducting Pneumatic Tube Segment on=
+Digiline Conducting Pneumatic Tube Segment=
+Mesecon and Digiline Conducting Pneumatic Tube Segment=
+Mesecon and Digiline Conducting Pneumatic Tube Segment on=
+
+## sorting tubes
+Sorting Pneumatic Tube Segment=
+Sorting pneumatic tube=
+
+## teleport tube
+Receive=
+channels are public by default=
+use <player>:<channel> for fully private channels=
+use <player>;<channel> for private receivers=
+Teleporting Pneumatic Tube Segment=
+unconfigured Teleportation Tube=
+Sorry, channel '@1' is reserved for exclusive use by @2=
+Sorry, receiving from channel '@1' is reserved for @2=
+Teleportation Tube @1 on '@2'=
+
+## trashcan
+Trash Can=
+
+## tube registration
+Pneumatic tube segment (legacy)=
+
+## vacuum tubes
+Vacuuming Pneumatic Tube Segment=
+Adjustable Vacuuming Pneumatic Tube Segment=
+Adjustable Vacuuming Pneumatic Tube Segment (@1m)=
+
+## wielder
+Node Breaker=
+Deployer=
+Dispenser=

luaentity.lua

@@ -9,16 +9,16 @@ local filename = minetest.get_worldpath().."/luaentities"
 local function read_file()
 	local f = io.open(filename, "r")
 	if f == nil then return {} end
-    	local t = f:read("*all")
-    	f:close()
+	local t = f:read("*all")
+	f:close()
 	if t == "" or t == nil then return {} end
 	return minetest.deserialize(t) or {}
 end
 
 local function write_file(tbl)
 	local f = io.open(filename, "w")
-    	f:write(minetest.serialize(tbl))
-    	f:close()
+	f:write(minetest.serialize(tbl))
+	f:close()
 end
 
 local function read_entities()
@@ -36,7 +36,7 @@ local function read_entities()
 		y=math.min(30927,y)
 		z=math.min(30927,z)
 
-		entity.start_pos.x = x                 
+		entity.start_pos.x = x
 		entity.start_pos.y = y
 		entity.start_pos.z = z
 
@@ -46,6 +46,11 @@ local function read_entities()
 end
 
 local function write_entities()
+	if not luaentity.entities then
+		-- This can happen if crashing on startup, causing another error that
+		-- masks the original one. Return gracefully in that case instead.
+		return
+	end
 	for _, entity in pairs(luaentity.entities) do
 		setmetatable(entity, nil)
 		for _, attached in pairs(entity._attached_entities) do
@@ -74,7 +79,7 @@ local move_entities_globalstep_part1 = function(dtime)
 	local active_block_range = tonumber(minetest.settings:get("active_block_range")) or 2
 	local new_active_blocks = {}
 	for _, player in ipairs(minetest.get_connected_players()) do
-		local blockpos = get_blockpos(player:getpos())
+		local blockpos = get_blockpos(player:get_pos())
 		local minp = vector.subtract(blockpos, active_block_range)
 		local maxp = vector.add(blockpos, active_block_range)
 
@@ -114,9 +119,9 @@ local entitydef_default = {
 		if not def.entity then
 			return
 		end
-		def.entity:setpos(vector.add(self._pos, def.offset))
-		def.entity:setvelocity(self._velocity)
-		def.entity:setacceleration(self._acceleration)
+		def.entity:set_pos(vector.add(self._pos, def.offset))
+		def.entity:set_velocity(self._velocity)
+		def.entity:set_acceleration(self._acceleration)
 	end,
 	_attach_all = function(self)
 		local master = self._attached_entities_master
@@ -186,43 +191,43 @@ local entitydef_default = {
 			self:_add_attached(id)
 		end
 	end,
-	getid = function(self)
+	get_id = function(self)
 		return self._id
 	end,
-	getpos = function(self)
+	get_pos = function(self)
 		return vector.new(self._pos)
 	end,
-	setpos = function(self, pos)
+	set_pos = function(self, pos)
 		self._pos = vector.new(pos)
 		--for _, entity in pairs(self._attached_entities) do
 		--	if entity.entity then
-		--		entity.entity:setpos(vector.add(self._pos, entity.offset))
+		--		entity.entity:set_pos(vector.add(self._pos, entity.offset))
 		--	end
 		--end
 		local master = self._attached_entities_master
 		if master then
 			local master_def = self._attached_entities[master]
-			master_def.entity:setpos(vector.add(self._pos, master_def.offset))
+			master_def.entity:set_pos(vector.add(self._pos, master_def.offset))
 		end
 	end,
-	getvelocity = function(self)
-		return vector.new(self._velocity)	
+	get_velocity = function(self)
+		return vector.new(self._velocity)
 	end,
-	setvelocity = function(self, velocity)
+	set_velocity = function(self, velocity)
 		self._velocity = vector.new(velocity)
 		local master = self._attached_entities_master
 		if master then
-			self._attached_entities[master].entity:setvelocity(self._velocity)
+			self._attached_entities[master].entity:set_velocity(self._velocity)
 		end
 	end,
-	getacceleration = function(self)
+	get_acceleration = function(self)
 		return vector.new(self._acceleration)
 	end,
-	setacceleration = function(self, acceleration)
+	set_acceleration = function(self, acceleration)
 		self._acceleration = vector.new(acceleration)
 		local master = self._attached_entities_master
 		if master then
-			self._attached_entities[master].entity:setacceleration(self._acceleration)
+			self._attached_entities[master].entity:set_acceleration(self._acceleration)
 		end
 	end,
 	remove = function(self)
@@ -284,7 +289,7 @@ function luaentity.add_entity(pos, name)
 		_acceleration = {x = 0, y = 0, z = 0},
 		_attached_entities = {},
 	}
-	
+
 	local prototype = luaentity.registered_entities[name]
 	setmetatable(entity, prototype) -- Default to prototype for other methods
 	luaentity.entities[index] = entity
@@ -313,28 +318,31 @@ end
 function luaentity.get_objects_inside_radius(pos, radius)
 	local objects = {}
 	local index = 1
-	for id, entity in pairs(luaentity.entities) do
-		if vector.distance(pos, entity:getpos()) <= radius then
+	for _, entity in pairs(luaentity.entities) do
+		if vector.distance(pos, entity:get_pos()) <= radius then
 			objects[index] = entity
 			index = index + 1
 		end
 	end
+	return objects
 end
 
 local move_entities_globalstep_part2 = function(dtime)
 	if not luaentity.entities then
 		luaentity.entities = read_entities()
 	end
-	for id, entity in pairs(luaentity.entities) do
+	for _, entity in pairs(luaentity.entities) do
 		local master = entity._attached_entities_master
 		local master_def = master and entity._attached_entities[master]
 		local master_entity = master_def and master_def.entity
-		local master_entity_pos = master_entity and master_entity:getpos()
+		local master_entity_pos = master_entity and master_entity:get_pos()
 		if master_entity_pos then
 			entity._pos = vector.subtract(master_entity_pos, master_def.offset)
-			entity._velocity = master_entity:getvelocity()
-			entity._acceleration = master_entity:getacceleration()
+			entity._velocity = master_entity:get_velocity()
+			entity._acceleration = master_entity:get_acceleration()
 		else
+			entity._velocity = entity._velocity or vector.new(0,0,0)
+			entity._acceleration = entity._acceleration or vector.new(0,0,0)
 			entity._pos = vector.add(vector.add(
 				entity._pos,
 				vector.multiply(entity._velocity, dtime)),

mod.conf

@@ -1 +1,5 @@
 name = pipeworks
+description = This mod uses mesh nodes and nodeboxes to supply a complete set of 3D pipes and tubes, along with devices that work with them.
+depends = default, basic_materials, screwdriver
+optional_depends = mesecons, mesecons_mvps, digilines, signs_lib
+min_minetest_version = 5.2.0

models.lua

@@ -33,8 +33,8 @@ pipeworks.tube_frontstub = {
 }
 
 pipeworks.tube_backstub = {
-	{ -9/64, -9/64, -9/64,   9/64, 9/64, 32/64 },	-- tube segment against -Z face
-} 
+	{ -9/64, -9/64, -9/64,   9/64, 9/64, 32/64 },	-- tube segment against +Z face
+}
 
 pipeworks.tube_boxes = {pipeworks.tube_leftstub, pipeworks.tube_rightstub, pipeworks.tube_bottomstub, pipeworks.tube_topstub, pipeworks.tube_frontstub, pipeworks.tube_backstub}
 

models/pipeworks_entry_panel_lowpoly.obj

@@ -0,0 +1,236 @@
+# Blender v2.78 (sub 0) OBJ File: 'pipe-entry-panel-lowpoly.blend'
+# www.blender.org
+o Cylinder.000
+v -0.500000 0.500000 -0.062500
+v 0.500000 0.500000 -0.062500
+v 0.500000 -0.500000 -0.062500
+v -0.500000 -0.500000 -0.062500
+v 0.500000 0.500000 0.062500
+v 0.500000 -0.500000 0.062500
+v -0.500000 0.500000 0.062500
+v -0.500000 -0.500000 0.062500
+v -0.156250 -0.064721 0.500000
+v -0.156250 -0.064721 0.468750
+v -0.064721 -0.156250 0.500000
+v -0.064721 -0.156250 0.468750
+v 0.064721 -0.156250 0.500000
+v 0.064721 -0.156250 0.468750
+v 0.156250 -0.064721 0.500000
+v 0.156250 -0.064721 0.468750
+v 0.156250 0.064721 0.500000
+v 0.156250 0.064721 0.468750
+v 0.064721 0.156250 0.500000
+v 0.064721 0.156250 0.468750
+v -0.064721 0.156250 0.500000
+v -0.064721 0.156250 0.468750
+v -0.156250 0.064721 0.500000
+v -0.156250 0.064721 0.468750
+v -0.125000 -0.051777 0.468750
+v -0.125000 -0.051777 -0.468750
+v -0.051777 -0.125000 0.468750
+v -0.051777 -0.125000 -0.468750
+v 0.051777 -0.125000 0.468750
+v 0.051777 -0.125000 -0.468750
+v 0.125000 -0.051777 0.468750
+v 0.125000 -0.051777 -0.468750
+v 0.125000 0.051777 0.468750
+v 0.125000 0.051777 -0.468750
+v 0.051777 0.125000 0.468750
+v 0.051777 0.125000 -0.468750
+v -0.051777 0.125000 0.468750
+v -0.051777 0.125000 -0.468750
+v -0.125000 0.051777 0.468750
+v -0.125000 0.051777 -0.468750
+v -0.156250 -0.064721 -0.468750
+v -0.156250 -0.064721 -0.500000
+v -0.064721 -0.156250 -0.468750
+v -0.064721 -0.156250 -0.500000
+v 0.064721 -0.156250 -0.468750
+v 0.064721 -0.156250 -0.500000
+v 0.156250 -0.064721 -0.468750
+v 0.156250 -0.064721 -0.500000
+v 0.156250 0.064721 -0.468750
+v 0.156250 0.064721 -0.500000
+v 0.064721 0.156250 -0.468750
+v 0.064721 0.156250 -0.500000
+v -0.064721 0.156250 -0.468750
+v -0.064721 0.156250 -0.500000
+v -0.156250 0.064721 -0.468750
+v -0.156250 0.064721 -0.500000
+vt 0.5076 0.5076
+vt 0.9924 0.5076
+vt 0.9924 0.9924
+vt 0.5076 0.9924
+vt 0.0682 0.4924
+vt 0.0076 0.4924
+vt 0.0076 0.0076
+vt 0.0682 0.0076
+vt 0.4924 0.9924
+vt 0.0076 0.9924
+vt 0.0076 0.5076
+vt 0.4924 0.5076
+vt 0.2955 0.4924
+vt 0.2348 0.4924
+vt 0.2348 0.0076
+vt 0.2955 0.0076
+vt 0.2197 0.0076
+vt 0.2197 0.4924
+vt 0.1591 0.4924
+vt 0.1591 0.0076
+vt 0.0833 0.4924
+vt 0.0833 0.0076
+vt 0.1439 0.0076
+vt 0.1439 0.4924
+vt 0.8561 0.4318
+vt 0.8106 0.4773
+vt 0.7500 0.4773
+vt 0.7045 0.4318
+vt 0.7045 0.3712
+vt 0.7500 0.3258
+vt 0.8106 0.3258
+vt 0.8561 0.3712
+vt 0.6288 0.4773
+vt 0.6742 0.4318
+vt 0.6742 0.3712
+vt 0.6288 0.3258
+vt 0.5682 0.3258
+vt 0.5227 0.3712
+vt 0.5227 0.4318
+vt 0.5682 0.4773
+vt 0.6742 0.4318
+vt 0.6288 0.4773
+vt 0.5682 0.4773
+vt 0.5227 0.4318
+vt 0.5227 0.3712
+vt 0.5682 0.3258
+vt 0.6288 0.3258
+vt 0.6742 0.3712
+vt 0.8106 0.4773
+vt 0.8561 0.4318
+vt 0.8561 0.3712
+vt 0.8106 0.3258
+vt 0.7500 0.3258
+vt 0.7045 0.3712
+vt 0.7045 0.4318
+vt 0.7500 0.4773
+vt 0.9015 0.2879
+vt 0.9015 0.2727
+vt 0.9318 0.2727
+vt 0.9318 0.2879
+vt 0.9621 0.2727
+vt 0.9621 0.2879
+vt 0.9924 0.2727
+vt 0.9924 0.2879
+vt 0.7500 0.2879
+vt 0.7500 0.2727
+vt 0.7803 0.2727
+vt 0.7803 0.2879
+vt 0.8106 0.2727
+vt 0.8106 0.2879
+vt 0.8409 0.2727
+vt 0.8409 0.2879
+vt 0.8712 0.2727
+vt 0.8712 0.2879
+vt 0.6894 0.2879
+vt 0.6894 0.2727
+vt 0.7197 0.2727
+vt 0.7197 0.2879
+vt 0.6591 0.2879
+vt 0.6591 0.2727
+vt 0.7500 0.2727
+vt 0.7500 0.2879
+vt 0.5076 0.2879
+vt 0.5076 0.2727
+vt 0.5379 0.2727
+vt 0.5379 0.2879
+vt 0.5682 0.2727
+vt 0.5682 0.2879
+vt 0.5985 0.2727
+vt 0.5985 0.2879
+vt 0.6288 0.2727
+vt 0.6288 0.2879
+vt 0.5227 0.2197
+vt 0.5227 0.1894
+vt 0.9924 0.1894
+vt 0.9924 0.2197
+vt 0.9924 0.2500
+vt 0.5227 0.2500
+vt 0.9924 0.0379
+vt 0.9924 0.0682
+vt 0.5227 0.0682
+vt 0.5227 0.0379
+vt 0.5227 0.1591
+vt 0.9924 0.1591
+vt 0.5227 0.1288
+vt 0.5227 0.0985
+vt 0.9924 0.0985
+vt 0.9924 0.1288
+vt 0.9924 0.0076
+vt 0.5227 0.0076
+vn 0.0000 -0.0000 -1.0000
+vn 1.0000 -0.0000 0.0000
+vn 0.0000 0.0000 1.0000
+vn -1.0000 -0.0000 0.0000
+vn 0.0000 -1.0000 0.0000
+vn 0.0000 1.0000 0.0000
+vn -0.7173 -0.2971 0.6302
+vn -0.7173 -0.2971 -0.6302
+vn -0.2971 -0.7173 -0.6302
+vn -0.2971 -0.7173 0.6302
+vn 0.2971 -0.7173 -0.6302
+vn 0.2971 -0.7173 0.6302
+vn 0.7173 -0.2971 -0.6302
+vn 0.7173 -0.2971 0.6302
+vn 0.7173 0.2971 -0.6302
+vn 0.7173 0.2971 0.6302
+vn 0.2971 0.7173 -0.6302
+vn 0.2971 0.7173 0.6302
+vn -0.2971 0.7173 -0.6302
+vn -0.2971 0.7173 0.6302
+vn -0.7173 0.2971 -0.6302
+vn -0.7173 0.2971 0.6302
+vn 0.9239 -0.3827 0.0000
+vn 0.9239 0.3827 0.0000
+vn 0.3827 -0.9239 0.0000
+vn -0.3827 -0.9239 0.0000
+vn -0.9239 -0.3827 0.0000
+vn 0.3827 0.9239 0.0000
+vn -0.3827 0.9239 0.0000
+vn -0.9239 0.3827 0.0000
+g Cylinder.000_Cylinder.000_None
+s off
+f 1/1/1 2/2/1 3/3/1 4/4/1
+f 2/5/2 5/6/2 6/7/2 3/8/2
+f 5/9/3 7/10/3 8/11/3 6/12/3
+f 7/13/4 1/14/4 4/15/4 8/16/4
+f 4/17/5 3/18/5 6/19/5 8/20/5
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models/pipeworks_fountainhead_lowpoly.obj

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models/pipeworks_pipe_10_lowpoly.obj

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models/pipeworks_pipe_2_lowpoly.obj

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models/pipeworks_pipe_3_lowpoly.obj

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models/pipeworks_pump_lowpoly.obj

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models/pipeworks_valve_on_lowpoly.obj

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pipes.lua

@@ -1,15 +1,21 @@
 -- This file supplies the steel pipes
+local S = minetest.get_translator("pipeworks")
 
 local REGISTER_COMPATIBILITY = true
 
 local pipes_empty_nodenames = {}
 local pipes_full_nodenames = {}
 
-local vti = {4, 3, 2, 1, 6, 5}
+local new_flow_logic_register = pipeworks.flowables.register
+
+local polys = ""
+if pipeworks.enable_lowpoly then polys = "_lowpoly" end
+
+--~ local vti = {4, 3, 2, 1, 6, 5}
 local cconnects = {{}, {1}, {1, 2}, {1, 3}, {1, 3, 5}, {1, 2, 3}, {1, 2, 3, 5}, {1, 2, 3, 4}, {1, 2, 3, 4, 5}, {1, 2, 3, 4, 5, 6}}
 for index, connects in ipairs(cconnects) do
 	local outsel = {}
-	
+
 	local jx = 0
 	local jy = 0
 	local jz = 0
@@ -24,33 +30,33 @@ for index, connects in ipairs(cconnects) do
 		table.insert(outsel, pipeworks.pipe_selectboxes[v])
 	end
 
+	--[[
 	if #connects == 1 then
 		local v = connects[1]
 		v = v-1 + 2*(v%2) -- Opposite side
 	end
-	
+	--]]
+
 	local pgroups = {snappy = 3, pipe = 1, not_in_creative_inventory = 1}
-	local pipedesc = "Pipe segement".." "..dump(connects).."... You hacker, you."
-	local image = nil
+	local pipedesc = S("Pipe Segment").." "..dump(connects)
 
 	if #connects == 0 then
 		pgroups = {snappy = 3, tube = 1}
-		pipedesc = "Pipe segment"
-		image = "pipeworks_pipe_inv.png"
+		pipedesc = S("Pipe Segment")
 	end
-	
+
 	local outimg_e = { "pipeworks_pipe_plain.png" }
 	local outimg_l = { "pipeworks_pipe_plain.png" }
 
-	if index == 3 then 
+	if index == 3 then
 		outimg_e = { "pipeworks_pipe_3_empty.png" }
 		outimg_l = { "pipeworks_pipe_3_loaded.png" }
 	end
 
-	local mesh = "pipeworks_pipe_"..index..".obj"
+	local mesh = "pipeworks_pipe_"..index..polys..".obj"
 
 	if index == 1 then
-		mesh = "pipeworks_pipe_3.obj"
+		mesh = "pipeworks_pipe_3"..polys..".obj"
 	end
 
 	minetest.register_node("pipeworks:pipe_"..index.."_empty", {
@@ -59,8 +65,6 @@ for index, connects in ipairs(cconnects) do
 		mesh = mesh,
 		tiles = outimg_e,
 		sunlight_propagates = true,
-		inventory_image = image,
-		wield_image = image,
 		paramtype = "light",
 		paramtype2 = "facedir",
 		selection_box = {
@@ -72,7 +76,7 @@ for index, connects in ipairs(cconnects) do
 			fixed = outsel
 		},
 		groups = pgroups,
-		sounds = default.node_sound_wood_defaults(),
+		sounds = default.node_sound_metal_defaults(),
 		walkable = true,
 		drop = "pipeworks:pipe_1_empty",
 		after_place_node = function(pos)
@@ -81,9 +85,12 @@ for index, connects in ipairs(cconnects) do
 		after_dig_node = function(pos)
 			pipeworks.scan_for_pipe_objects(pos)
 		end,
-		on_rotate = false
+		on_rotate = false,
+		check_for_pole = pipeworks.check_for_vert_pipe,
+		check_for_horiz_pole = pipeworks.check_for_horiz_pipe,
+		pipenumber = index
 	})
-	
+
 	local pgroups = {snappy = 3, pipe = 1, not_in_creative_inventory = 1}
 
 	minetest.register_node("pipeworks:pipe_"..index.."_loaded", {
@@ -103,7 +110,7 @@ for index, connects in ipairs(cconnects) do
 			fixed = outsel
 		},
 		groups = pgroups,
-		sounds = default.node_sound_wood_defaults(),
+		sounds = default.node_sound_metal_defaults(),
 		walkable = true,
 		drop = "pipeworks:pipe_1_empty",
 		after_place_node = function(pos)
@@ -113,11 +120,18 @@ for index, connects in ipairs(cconnects) do
 		after_dig_node = function(pos)
 			pipeworks.scan_for_pipe_objects(pos)
 		end,
-		on_rotate = false
+		on_rotate = false,
+		check_for_pole = pipeworks.check_for_vert_pipe,
+		check_for_horiz_pole = pipeworks.check_for_horiz_pipe,
+		pipenumber = index
 	})
-	
-	table.insert(pipes_empty_nodenames, "pipeworks:pipe_"..index.."_empty")
-	table.insert(pipes_full_nodenames,  "pipeworks:pipe_"..index.."_loaded")
+
+	local emptypipe = "pipeworks:pipe_"..index.."_empty"
+	local fullpipe = "pipeworks:pipe_"..index.."_loaded"
+	table.insert(pipes_empty_nodenames, emptypipe)
+	table.insert(pipes_full_nodenames, fullpipe)
+	new_flow_logic_register.simple(emptypipe)
+	new_flow_logic_register.simple(fullpipe)
 end
 
 
@@ -129,9 +143,7 @@ if REGISTER_COMPATIBILITY then
 		drawtype = "airlike",
 		sunlight_propagates = true,
 		paramtype = "light",
-		inventory_image = "pipeworks_pipe_inv.png",
-		wield_image = "pipeworks_pipe_inv.png",
-		description = "Pipe Segment (legacy)",
+		description = S("Pipe Segment (legacy)"),
 		groups = {not_in_creative_inventory = 1, pipe_to_update = 1},
 		drop = "pipeworks:pipe_1_empty",
 		after_place_node = function(pos)
@@ -144,7 +156,6 @@ if REGISTER_COMPATIBILITY then
 		drawtype = "airlike",
 		sunlight_propagates = true,
 		paramtype = "light",
-		inventory_image = "pipeworks_pipe_inv.png",
 		groups = {not_in_creative_inventory = 1, pipe_to_update = 1},
 		drop = "pipeworks:pipe_1_empty",
 		after_place_node = function(pos)
@@ -182,14 +193,31 @@ if REGISTER_COMPATIBILITY then
 	})
 end
 
-table.insert(pipes_empty_nodenames,"pipeworks:valve_on_empty")
-table.insert(pipes_empty_nodenames,"pipeworks:valve_off_empty")
-table.insert(pipes_empty_nodenames,"pipeworks:entry_panel_empty")
-table.insert(pipes_empty_nodenames,"pipeworks:flow_sensor_empty")
+local valve_on = "pipeworks:valve_on_empty"
+local valve_off = "pipeworks:valve_off_empty"
+local entry_panel_empty = "pipeworks:entry_panel_empty"
+local flow_sensor_empty = "pipeworks:flow_sensor_empty"
+local sp_empty = "pipeworks:straight_pipe_empty"
+-- XXX: why aren't these in devices.lua!?
+table.insert(pipes_empty_nodenames, valve_on)
+table.insert(pipes_empty_nodenames, valve_off)
+table.insert(pipes_empty_nodenames, entry_panel_empty)
+table.insert(pipes_empty_nodenames, flow_sensor_empty)
+table.insert(pipes_empty_nodenames, sp_empty)
 
-table.insert(pipes_full_nodenames,"pipeworks:valve_on_loaded")
-table.insert(pipes_full_nodenames,"pipeworks:entry_panel_loaded")
-table.insert(pipes_full_nodenames,"pipeworks:flow_sensor_loaded")
+local valve_on_loaded = "pipeworks:valve_on_loaded"
+local entry_panel_loaded = "pipeworks:entry_panel_loaded"
+local flow_sensor_loaded = "pipeworks:flow_sensor_loaded"
+local sp_loaded = "pipeworks:straight_pipe_loaded"
+table.insert(pipes_full_nodenames, valve_on_loaded)
+table.insert(pipes_full_nodenames, entry_panel_loaded)
+table.insert(pipes_full_nodenames, flow_sensor_loaded)
+table.insert(pipes_full_nodenames, sp_loaded)
+
+pipeworks.pipes_full_nodenames = pipes_full_nodenames
+pipeworks.pipes_empty_nodenames = pipes_empty_nodenames
+
+if pipeworks.toggles.pipe_mode == "classic" then
 
 minetest.register_abm({
 	nodenames = pipes_empty_nodenames,
@@ -213,7 +241,7 @@ minetest.register_abm({
 	nodenames = {"pipeworks:spigot","pipeworks:spigot_pouring"},
 	interval = 1,
 	chance = 1,
-	action = function(pos, node, active_object_count, active_object_count_wider) 
+	action = function(pos, node, active_object_count, active_object_count_wider)
 		pipeworks.spigot_check(pos,node)
 	end
 })
@@ -222,8 +250,11 @@ minetest.register_abm({
 	nodenames = {"pipeworks:fountainhead","pipeworks:fountainhead_pouring"},
 	interval = 1,
 	chance = 1,
-	action = function(pos, node, active_object_count, active_object_count_wider) 
+	action = function(pos, node, active_object_count, active_object_count_wider)
 		pipeworks.fountainhead_check(pos,node)
 	end
 })
 
+
+
+end

pressure_logic/abm_register.lua

@@ -0,0 +1,27 @@
+-- register new flow logic ABMs
+-- written 2017 by thetaepsilon
+
+local register = {}
+pipeworks.flowlogic.abmregister = register
+
+local flowlogic = pipeworks.flowlogic
+
+-- register node list for the main logic function.
+-- see flowlogic.run() in abms.lua.
+
+local register_flowlogic_abm = function(nodename)
+	if pipeworks.toggles.pipe_mode == "pressure" then
+		minetest.register_abm({
+			label = "pipeworks new_flow_logic run",
+			nodenames = { nodename },
+			interval = 1,
+			chance = 1,
+			action = function(pos, node, active_object_count, active_object_count_wider)
+				flowlogic.run(pos, node)
+			end
+		})
+	else
+		minetest.log("warning", "pipeworks pressure_logic not enabled but register.flowlogic() requested")
+	end
+end
+register.flowlogic = register_flowlogic_abm

pressure_logic/abms.lua

@@ -0,0 +1,371 @@
+-- reimplementation of new_flow_logic branch: processing functions
+-- written 2017 by thetaepsilon
+
+
+
+local flowlogic = {}
+flowlogic.helpers = {}
+pipeworks.flowlogic = flowlogic
+
+
+
+-- borrowed from above: might be useable to replace the above coords tables
+local make_coords_offsets = function(pos, include_base)
+	local coords = {
+		{x=pos.x,y=pos.y-1,z=pos.z},
+		{x=pos.x,y=pos.y+1,z=pos.z},
+		{x=pos.x-1,y=pos.y,z=pos.z},
+		{x=pos.x+1,y=pos.y,z=pos.z},
+		{x=pos.x,y=pos.y,z=pos.z-1},
+		{x=pos.x,y=pos.y,z=pos.z+1},
+	}
+	if include_base then table.insert(coords, pos) end
+	return coords
+end
+
+
+
+-- local debuglog = function(msg) print("## "..msg) end
+
+
+
+--~ local formatvec = function(vec) local sep="," return "("..tostring(vec.x)..sep..tostring(vec.y)..sep..tostring(vec.z)..")" end
+
+
+
+-- new version of liquid check
+-- accepts a limit parameter to only delete water blocks that the receptacle can accept,
+-- and returns it so that the receptacle can update it's pressure values.
+local check_for_liquids_v2 = function(pos, limit)
+	local coords = make_coords_offsets(pos, false)
+	local total = 0
+	for _, tpos in ipairs(coords) do
+		if total >= limit then break end
+		local name = minetest.get_node(tpos).name
+		if name == "default:water_source" then
+			minetest.remove_node(tpos)
+			total = total + 1
+		end
+	end
+	--pipeworks.logger("check_for_liquids_v2@"..formatvec(pos).." total "..total)
+	return total
+end
+flowlogic.check_for_liquids_v2 = check_for_liquids_v2
+
+
+
+local label_pressure = "pipeworks.water_pressure"
+local get_pressure_access = function(pos)
+	local metaref = minetest.get_meta(pos)
+	return {
+		get = function()
+			return metaref:get_float(label_pressure)
+		end,
+		set = function(v)
+			metaref:set_float(label_pressure, v)
+		end
+	}
+end
+
+
+-- logging is unreliable when something is crashing...
+--[[
+local nilexplode = function(caller, label, value)
+	if value == nil then
+		error(caller..": "..label.." was nil")
+	end
+end
+--]]
+
+
+
+local finitemode = pipeworks.toggles.finite_water
+flowlogic.run = function(pos, node)
+	local nodename = node.name
+	-- get the current pressure value.
+	local nodepressure = get_pressure_access(pos)
+	local currentpressure = nodepressure.get()
+	local oldpressure = currentpressure
+
+	-- if node is an input: run intake phase
+	local inputdef = pipeworks.flowables.inputs.list[nodename]
+	if inputdef then
+		currentpressure = flowlogic.run_input(pos, node, currentpressure, inputdef)
+		--debuglog("post-intake currentpressure is "..currentpressure)
+		--nilexplode("run()", "currentpressure", currentpressure)
+	end
+
+	-- balance pressure with neighbours
+	currentpressure = flowlogic.balance_pressure(pos, node, currentpressure)
+
+	-- if node is an output: run output phase
+	local outputdef = pipeworks.flowables.outputs.list[nodename]
+	if outputdef then
+		currentpressure = flowlogic.run_output(
+			pos,
+			node,
+			currentpressure,
+			oldpressure,
+			outputdef,
+			finitemode)
+	end
+
+	-- if node has pressure transitions: determine new node
+	if pipeworks.flowables.transitions.list[nodename] then
+		local newnode = flowlogic.run_transition(node, currentpressure)
+		--pipeworks.logger("flowlogic.run()@"..formatvec(pos).." transition, new node name = "..dump(newnode).." pressure "..tostring(currentpressure))
+		minetest.swap_node(pos, newnode)
+		flowlogic.run_transition_post(pos, newnode)
+	end
+
+	-- set the new pressure
+	nodepressure.set(currentpressure)
+end
+
+
+
+local simple_neighbour_offsets = {
+		{x=0, y=-1,z= 0},
+		{x=0, y= 1,z= 0},
+		{x=-1,y= 0,z= 0},
+		{x= 1,y= 0,z= 0},
+		{x= 0,y= 0,z=-1},
+		{x= 0,y= 0,z= 1},
+}
+local get_neighbour_positions = function(pos, node)
+	-- local dname = "get_neighbour_positions@"..formatvec(pos).." "
+	-- get list of node neighbours.
+	-- if this node is directional and only flows on certain sides,
+	-- invoke the callback to retrieve the set.
+	-- for simple flowables this is just an auto-gen'd list of all six possible neighbours.
+	local candidates = {}
+	if pipeworks.flowables.list.simple[node.name] then
+		candidates = simple_neighbour_offsets
+	else
+		-- directional flowables: call the callback to get the list
+		local directional = pipeworks.flowables.list.directional[node.name]
+		if directional then
+			--pipeworks.logger(dname.."invoking neighbourfn")
+			local offsets = directional.neighbourfn(node)
+			candidates = offsets
+		end
+	end
+
+	-- then, check each possible neighbour to see if they can be reached from this node.
+	local connections = {}
+	for _, offset in ipairs(candidates) do
+		local npos = vector.add(pos, offset)
+		local neighbour = minetest.get_node(npos)
+		local nodename = neighbour.name
+		local is_simple = (pipeworks.flowables.list.simple[nodename])
+		if is_simple then
+			local n = get_pressure_access(npos)
+			table.insert(connections, n)
+		else
+			-- if target node is also directional, check if it agrees it can flow in that direction
+			local directional = pipeworks.flowables.list.directional[nodename]
+			if directional then
+				--pipeworks.logger(dname.."directionality test for offset "..formatvec(offset))
+				local towards_origin = vector.multiply(offset, -1)
+				--pipeworks.logger(dname.."vector passed to directionfn: "..formatvec(towards_origin))
+				local result = directional.directionfn(neighbour, towards_origin)
+				--pipeworks.logger(dname.."result: "..tostring(result))
+				if result then
+					local n = get_pressure_access(npos)
+					table.insert(connections, n)
+				end
+			end
+		end
+	end
+
+	return connections
+end
+
+
+
+flowlogic.balance_pressure = function(pos, node, currentpressure)
+	-- local dname = "flowlogic.balance_pressure()@"..formatvec(pos).." "
+	-- check the pressure of all nearby flowable nodes, and average it out.
+
+	-- unconditionally include self in nodes to average over.
+	-- result of averaging will be returned as new pressure for main flow logic callback
+	local totalv = currentpressure
+	local totalc = 1
+
+	-- pressure handles to average over
+	local connections = get_neighbour_positions(pos, node)
+
+	-- for each neighbour, add neighbour's pressure to the total to balance out
+	for _, neighbour in ipairs(connections) do
+		local n = neighbour.get()
+		totalv = totalv + n
+		totalc = totalc + 1
+	end
+	local average = totalv / totalc
+	for _, target in ipairs(connections) do
+		target.set(average)
+	end
+
+	return average
+end
+
+
+
+flowlogic.run_input = function(pos, node, currentpressure, inputdef)
+	-- intakefn allows a given input node to define it's own intake logic.
+	-- this function will calculate the maximum amount of water that can be taken in;
+	-- the intakefn will be given this and is expected to return the actual absorption amount.
+
+	local maxpressure = inputdef.maxpressure
+	local intake_limit = maxpressure - currentpressure
+	if intake_limit <= 0 then return currentpressure end
+
+	local actual_intake = inputdef.intakefn(pos, intake_limit)
+	--pipeworks.logger("run_input@"..formatvec(pos).." oldpressure "..currentpressure.." intake_limit "..intake_limit.." actual_intake "..actual_intake)
+	if actual_intake <= 0 then return currentpressure end
+
+	local newpressure = actual_intake + currentpressure
+	--debuglog("run_input() end, oldpressure "..currentpressure.." intake_limit "..intake_limit.." actual_intake "..actual_intake.." newpressure "..newpressure)
+	return newpressure
+end
+
+
+
+-- flowlogic output helper implementation:
+-- outputs water by trying to place water nodes nearby in the world.
+-- neighbours is a list of node offsets to try placing water in.
+-- this is a constructor function, returning another function which satisfies the output helper requirements.
+-- note that this does *not* take rotation into account.
+flowlogic.helpers.make_neighbour_output_fixed = function(neighbours)
+	return function(pos, node, currentpressure, finitemode)
+		local taken = 0
+		for _, offset in pairs(neighbours) do
+			local npos = vector.add(pos, offset)
+			local name = minetest.get_node(npos).name
+			if currentpressure < 1 then break end
+			-- take pressure anyway in non-finite mode, even if node is water source already.
+			-- in non-finite mode, pressure has to be sustained to keep the sources there.
+			-- so in non-finite mode, placing water is dependent on the target node;
+			-- draining pressure is not.
+			local canplace = (name == "air") or (name == "default:water_flowing")
+			if canplace then
+				minetest.swap_node(npos, {name="default:water_source"})
+			end
+			if (not finitemode) or canplace then
+				taken = taken + 1
+				currentpressure = currentpressure - 1
+			end
+		end
+		return taken
+	end
+end
+
+-- complementary function to the above when using non-finite mode:
+-- removes water sources from neighbor positions when the output is "off" due to lack of pressure.
+flowlogic.helpers.make_neighbour_cleanup_fixed = function(neighbours)
+	return function(pos, node, currentpressure)
+		--pipeworks.logger("neighbour_cleanup_fixed@"..formatvec(pos))
+		for _, offset in pairs(neighbours) do
+			local npos = vector.add(pos, offset)
+			local name = minetest.get_node(npos).name
+			if (name == "default:water_source") then
+				--pipeworks.logger("neighbour_cleanup_fixed removing "..formatvec(npos))
+				minetest.remove_node(npos)
+			end
+		end
+	end
+end
+
+
+
+flowlogic.run_output = function(pos, node, currentpressure, oldpressure, outputdef, finitemode)
+	-- processing step for water output devices.
+	-- takes care of checking a minimum pressure value and updating the resulting pressure level
+	-- the outputfn is provided the current pressure and returns the pressure "taken".
+	-- as an example, using this with the above spigot function,
+	-- the spigot function tries to output a water source if it will fit in the world.
+	--pipeworks.logger("flowlogic.run_output() pos "..formatvec(pos).." old -> currentpressure "..tostring(oldpressure).." "..tostring(currentpressure).." finitemode "..tostring(finitemode))
+	local upper = outputdef.upper
+	local lower = outputdef.lower
+	local result = currentpressure
+	local threshold
+	if finitemode then threshold = lower else threshold = upper end
+	if currentpressure > threshold then
+		local takenpressure = outputdef.outputfn(pos, node, currentpressure, finitemode)
+		local newpressure = currentpressure - takenpressure
+		if newpressure < 0 then newpressure = 0 end
+		result = newpressure
+	end
+	if (not finitemode) and (currentpressure < lower) and (oldpressure < lower) then
+		--pipeworks.logger("flowlogic.run_output() invoking cleanup currentpressure="..tostring(currentpressure))
+		outputdef.cleanupfn(pos, node, currentpressure)
+	end
+	return result
+end
+
+
+
+-- determine which node to switch to based on current pressure
+flowlogic.run_transition = function(node, currentpressure)
+	local simplesetdef = pipeworks.flowables.transitions.simple[node.name]
+	local result = node
+	local found = false
+
+	-- simple transition sets: assumes all nodes in the set share param values.
+	if simplesetdef then
+		-- assumes that the set has been checked to contain at least one element...
+		local nodename_prev = simplesetdef[1].nodename
+		local result_nodename = node.name
+
+		for _, element in ipairs(simplesetdef) do
+			-- find the highest element that is below the current pressure.
+			local threshold = element.threshold
+			if threshold > currentpressure then
+				result_nodename = nodename_prev
+				found = true
+				break
+			end
+			nodename_prev = element.nodename
+		end
+
+		-- use last element if no threshold is greater than current pressure
+		if not found then
+			result_nodename = nodename_prev
+			found = true
+		end
+
+		-- preserve param1/param2 values
+		result = { name=result_nodename, param1=node.param1, param2=node.param2 }
+	end
+
+	if not found then
+		pipeworks.logger("flowlogic.run_transition() BUG no transition " ..
+			"definitions found! node.name=" .. node.name ..
+			" currentpressure=" .. tostring(currentpressure))
+	end
+
+	return result
+end
+
+-- post-update hook for run_transition
+-- among other things, updates mesecons if present.
+-- node here means the new node, returned from run_transition() above
+flowlogic.run_transition_post = function(pos, node)
+	local mesecons_def = minetest.registered_nodes[node.name].mesecons
+	local mesecons_rules = pipeworks.flowables.transitions.mesecons[node.name]
+	if minetest.global_exists("mesecon") and (mesecons_def ~= nil) and mesecons_rules then
+		if type(mesecons_def) ~= "table" then
+			pipeworks.logger("flowlogic.run_transition_post() BUG mesecons def for "..node.name.."not a table: got "..tostring(mesecons_def))
+		else
+			local receptor = mesecons_def.receptor
+			if receptor then
+				local state = receptor.state
+				if state == mesecon.state.on then
+					mesecon.receptor_on(pos, mesecons_rules)
+				elseif state == mesecon.state.off then
+					mesecon.receptor_off(pos, mesecons_rules)
+				end
+			end
+		end
+	end
+end

pressure_logic/flowable_node_registry.lua

@@ -0,0 +1,53 @@
+-- registry of flowable node behaviours in new flow logic
+-- written 2017 by thetaepsilon
+
+-- the actual registration functions which edit these tables can be found in flowable_node_registry_install.lua
+-- this is because the ABM code needs to inspect these tables,
+-- but the registration code needs to reference said ABM code.
+-- so those functions were split out to resolve a circular dependency.
+
+
+
+pipeworks.flowables = {}
+pipeworks.flowables.list = {}
+pipeworks.flowables.list.all = {}
+-- pipeworks.flowables.list.nodenames = {}
+
+-- simple flowables - balance pressure in any direction
+pipeworks.flowables.list.simple = {}
+pipeworks.flowables.list.simple_nodenames = {}
+
+-- directional flowables - can only flow on certain sides
+-- format per entry is a table with the following fields:
+-- neighbourfn: function(node),
+--	called to determine which nodes to consider as neighbours.
+--	can be used to e.g. inspect the node's param values for facedir etc.
+--	returns: array of vector offsets to look for possible neighbours in
+-- directionfn: function(node, vector):
+--	can this node flow in this direction?
+--	called in the context of another node to check the matching entry returned by neighbourfn.
+-- for every offset vector returned by neighbourfn,
+-- the node at that absolute position is checked.
+-- if that node is also a directional flowable,
+-- then that node's vector is passed to that node's directionfn
+-- (inverted, so that directionfn sees a vector pointing out from it back to the origin node).
+-- if directionfn agrees that the neighbour node can currently flow in that direction,
+-- the neighbour is to participate in pressure balancing.
+pipeworks.flowables.list.directional = {}
+
+-- simple intakes - try to absorb any adjacent water nodes
+pipeworks.flowables.inputs = {}
+pipeworks.flowables.inputs.list = {}
+pipeworks.flowables.inputs.nodenames = {}
+
+-- outputs - takes pressure from pipes and update world to do something with it
+pipeworks.flowables.outputs = {}
+pipeworks.flowables.outputs.list = {}
+-- not currently any nodenames arraylist for this one as it's not currently needed.
+
+-- nodes with registered node transitions
+-- nodes will be switched depending on pressure level
+pipeworks.flowables.transitions = {}
+pipeworks.flowables.transitions.list = {}	-- master list
+pipeworks.flowables.transitions.simple = {}	-- nodes that change based purely on pressure
+pipeworks.flowables.transitions.mesecons = {}	-- table of mesecons rules to apply on transition

pressure_logic/flowable_node_registry_install.lua

@@ -0,0 +1,263 @@
+-- flowable node registry: add entries and install ABMs if new flow logic is enabled
+-- written 2017 by thetaepsilon
+
+
+
+-- use for hooking up ABMs as nodes are registered
+local abmregister = pipeworks.flowlogic.abmregister
+
+-- registration functions
+pipeworks.flowables.register = {}
+local register = pipeworks.flowables.register
+
+-- some sanity checking for passed args, as this could potentially be made an external API eventually
+local checkexists = function(nodename)
+	if type(nodename) ~= "string" then error("pipeworks.flowables nodename must be a string!") end
+	return pipeworks.flowables.list.all[nodename]
+end
+
+local insertbase = function(nodename)
+	if checkexists(nodename) then error("pipeworks.flowables duplicate registration!") end
+	pipeworks.flowables.list.all[nodename] = true
+	-- table.insert(pipeworks.flowables.list.nodenames, nodename)
+	if pipeworks.toggles.pipe_mode == "pressure" then
+		abmregister.flowlogic(nodename)
+	end
+end
+
+local regwarning = function(kind, nodename)
+	--~ local tail = ""
+	--~ if pipeworks.toggles.pipe_mode ~= "pressure" then tail = " but pressure logic not enabled" end
+	--pipeworks.logger(kind.." flow logic registry requested for "..nodename..tail)
+end
+
+-- Register a node as a simple flowable.
+-- Simple flowable nodes have no considerations for direction of flow;
+-- A cluster of adjacent simple flowables will happily average out in any direction.
+register.simple = function(nodename)
+	insertbase(nodename)
+	pipeworks.flowables.list.simple[nodename] = true
+	table.insert(pipeworks.flowables.list.simple_nodenames, nodename)
+	regwarning("simple", nodename)
+end
+
+-- Register a node as a directional flowable:
+-- has a helper function which determines which nodes to consider valid neighbours.
+register.directional = function(nodename, neighbourfn, directionfn)
+	insertbase(nodename)
+	pipeworks.flowables.list.directional[nodename] = {
+		neighbourfn = neighbourfn,
+		directionfn = directionfn
+	}
+	regwarning("directional", nodename)
+end
+
+-- register a node as a directional flowable that can only flow through either the top or bottom side.
+-- used for fountainheads (bottom side) and pumps (top side).
+-- this is in world terms, not facedir relative!
+register.directional_vertical_fixed = function(nodename, topside)
+	local y
+	if topside then y = 1 else y = -1 end
+	local side = { x=0, y=y, z=0 }
+	local neighbourfn = function(node) return { side } end
+	local directionfn = function(node, direction)
+		return vector.equals(direction, side)
+	end
+	register.directional(nodename, neighbourfn, directionfn)
+end
+
+-- register a node as a directional flowable whose accepting sides depends upon param2 rotation.
+-- used for entry panels, valves, flow sensors and spigots.
+-- this is mostly for legacy reasons and SHOULD NOT BE USED IN NEW CODE.
+register.directional_horizonal_rotate = function(nodename, doubleended)
+	local rotations = {
+		{x= 0,y= 0,z= 1},
+		{x= 1,y= 0,z= 0},
+		{x= 0,y= 0,z=-1},
+		{x=-1,y= 0,z= 0},
+	}
+	local getends = function(node)
+		--local dname = "horizontal rotate getends() "
+		local param2 = node.param2
+		-- the pipeworks nodes use a fixed value for vertical facing nodes
+		-- if that is detected, just return that directly.
+		if param2 == 17 then
+			return {{x=0,y=1,z=0}, {x=0,y=-1,z=0}}
+		end
+
+		-- the sole end of the spigot points in the direction the rotation bits suggest
+		-- also note to self: lua arrays start at one...
+		local mainend = (param2 % 4) + 1
+		-- use modulus wrap-around to find other end for straight-run devices like the valve
+		local otherend = ((param2 + 2) % 4) + 1
+		local mainrot = rotations[mainend]
+		--pipeworks.logger(dname.."mainrot: "..dump(mainrot))
+		local result
+		if doubleended then
+			result = { mainrot, rotations[otherend] }
+		else
+			result = { mainrot }
+		end
+		--pipeworks.logger(dname.."result: "..dump(result))
+		return result
+	end
+	local neighbourfn = function(node)
+		return getends(node)
+	end
+	local directionfn = function(node, direction)
+		local result = false
+		for _, endvec in ipairs(getends(node)) do
+			if vector.equals(direction, endvec) then result = true end
+		end
+		return result
+	end
+	register.directional(nodename, neighbourfn, directionfn)
+end
+
+
+
+local checkbase = function(nodename)
+	if not checkexists(nodename) then error("pipeworks.flowables node doesn't exist as a flowable!") end
+end
+
+local duplicateerr = function(kind, nodename) error(kind.." duplicate registration for "..nodename) end
+
+
+
+-- Registers a node as a fluid intake.
+-- intakefn is used to determine the water that can be taken in a node-specific way.
+-- Expects node to be registered as a flowable (is present in flowables.list.all),
+-- so that water can move out of it.
+-- maxpressure is the maximum pipeline pressure that this node can drive;
+-- if the input's node exceeds this the callback is not run.
+-- possible WISHME here: technic-driven high-pressure pumps
+register.intake = function(nodename, maxpressure, intakefn)
+	-- check for duplicate registration of this node
+	local list = pipeworks.flowables.inputs.list
+	checkbase(nodename)
+	if list[nodename] then duplicateerr("pipeworks.flowables.inputs", nodename) end
+	list[nodename] = { maxpressure=maxpressure, intakefn=intakefn }
+	regwarning("intake", nodename)
+end
+
+
+
+-- Register a node as a simple intake:
+-- tries to absorb water source nodes from it's surroundings.
+-- may exceed limit slightly due to needing to absorb whole nodes.
+register.intake_simple = function(nodename, maxpressure)
+	register.intake(nodename, maxpressure, pipeworks.flowlogic.check_for_liquids_v2)
+end
+
+
+
+-- Register a node as an output.
+-- Expects node to already be a flowable.
+-- upper and lower thresholds have different meanings depending on whether finite liquid mode is in effect.
+-- if not (the default unless auto-detected),
+-- nodes above their upper threshold have their outputfn invoked (and pressure deducted),
+-- nodes between upper and lower are left idle,
+-- and nodes below lower have their cleanup fn invoked (to say remove water sources).
+-- the upper and lower difference acts as a hysteresis to try and avoid "gaps" in the flow.
+-- if finite mode is on, upper is ignored and lower is used to determine whether to run outputfn;
+-- cleanupfn is ignored in this mode as finite mode assumes something causes water to move itself.
+register.output = function(nodename, upper, lower, outputfn, cleanupfn)
+	if pipeworks.flowables.outputs.list[nodename] then
+		error("pipeworks.flowables.outputs duplicate registration!")
+	end
+	checkbase(nodename)
+	pipeworks.flowables.outputs.list[nodename] = {
+		upper=upper,
+		lower=lower,
+		outputfn=outputfn,
+		cleanupfn=cleanupfn,
+	}
+	-- output ABM now part of main flow logic ABM to preserve ordering.
+	-- note that because outputs have to be a flowable first
+	-- (and the installation of the flow logic ABM is conditional),
+	-- registered output nodes for new_flow_logic is also still conditional on the enable flag.
+	regwarning("output node", nodename)
+end
+
+-- register a simple output:
+-- drains pressure by attempting to place water in nearby nodes,
+-- which can be set by passing a list of offset vectors.
+-- will attempt to drain as many whole nodes as there are positions in the offset list.
+-- for meanings of upper and lower, see register.output() above.
+-- non-finite mode:
+--	above upper pressure: places water sources as appropriate, keeps draining pressure.
+--	below lower presssure: removes it's neighbour water sources.
+-- finite mode:
+--	same as for above pressure in non-finite mode,
+--	but only drains pressure when water source nodes are actually placed.
+register.output_simple = function(nodename, upper, lower, neighbours)
+	local outputfn = pipeworks.flowlogic.helpers.make_neighbour_output_fixed(neighbours)
+	local cleanupfn = pipeworks.flowlogic.helpers.make_neighbour_cleanup_fixed(neighbours)
+	register.output(nodename, upper, lower, outputfn, cleanupfn)
+end
+
+
+
+-- common base checking for transition nodes
+-- ensures the node has only been registered once as a transition.
+local transition_list = pipeworks.flowables.transitions.list
+local insert_transition_base = function(nodename)
+	checkbase(nodename)
+	if transition_list[nodename] then duplicateerr("base transition", nodename) end
+	transition_list[nodename] = true
+end
+
+
+
+-- register a simple transition set.
+-- expects a table with nodenames as keys and threshold pressures as values.
+-- internally, the table is sorted by value, and when one of these nodes needs to transition,
+-- the table is searched starting from the lowest (even if it's value is non-zero),
+-- until a value is found which is higher than or equal to the current node pressure.
+-- ex. nodeset = { ["mod:level_0"] = 0, ["mod:level_1"] = 1, --[[ ... ]] }
+local simpleseterror = function(msg)
+	error("register.transition_simple_set(): "..msg)
+end
+local simple_transitions = pipeworks.flowables.transitions.simple
+
+register.transition_simple_set = function(nodeset, extras)
+	local set = {}
+	if extras == nil then extras = {} end
+
+	local length = #nodeset
+	if length < 2 then simpleseterror("nodeset needs at least two elements!") end
+	for index, element in ipairs(nodeset) do
+		if type(element) ~= "table" then simpleseterror("element "..tostring(index).." in nodeset was not table!") end
+		local nodename = element[1]
+		local value = element[2]
+		if type(nodename) ~= "string" then simpleseterror("nodename "..tostring(nodename).."was not a string!") end
+		if type(value) ~= "number" then simpleseterror("pressure value "..tostring(value).."was not a number!") end
+		insert_transition_base(nodename)
+		if simple_transitions[nodename] then duplicateerr("simple transition set", nodename) end
+		-- assigning set to table is done separately below
+
+		table.insert(set, { nodename=nodename, threshold=value })
+	end
+
+	-- sort pressure values, smallest first
+	local smallest_first = function(a, b)
+		return a.threshold < b.threshold
+	end
+	table.sort(set, smallest_first)
+
+	-- individual registration of each node, all sharing this set,
+	-- so each node in the set will transition to the correct target node.
+	for _, element in ipairs(set) do
+		--pipeworks.logger("register.transition_simple_set() after sort: nodename "..element.nodename.." value "..tostring(element.threshold))
+		simple_transitions[element.nodename] = set
+	end
+
+	-- handle extra options
+	-- if mesecons rules table was passed, set for each node
+	if extras.mesecons then
+		local mesecons_rules = pipeworks.flowables.transitions.mesecons
+		for _, element in ipairs(set) do
+			mesecons_rules[element.nodename] = extras.mesecons
+		end
+	end
+end

routing_tubes.lua

@@ -1,19 +1,19 @@
-
+local S = minetest.get_translator("pipeworks")
 -- the default tube and default textures
-pipeworks.register_tube("pipeworks:tube", "Pneumatic tube segment")
+pipeworks.register_tube("pipeworks:tube", S("Pneumatic tube segment"))
 minetest.register_craft( {
 	output = "pipeworks:tube_1 6",
 	recipe = {
-	        { "homedecor:plastic_sheeting", "homedecor:plastic_sheeting", "homedecor:plastic_sheeting" },
+	        { "basic_materials:plastic_sheet", "basic_materials:plastic_sheet", "basic_materials:plastic_sheet" },
 	        { "", "", "" },
-	        { "homedecor:plastic_sheeting", "homedecor:plastic_sheeting", "homedecor:plastic_sheeting" }
+	        { "basic_materials:plastic_sheet", "basic_materials:plastic_sheet", "basic_materials:plastic_sheet" }
 	},
 })
 
 local nodecolor = 0xffff3030
 
 pipeworks.register_tube("pipeworks:broken_tube", {
-	description = "Broken Tube (you hacker you)",
+	description = S("Broken Tube"),
 	plain = { { name = "pipeworks_broken_tube_plain.png", backface_culling = false, color = nodecolor } },
 	noctr = { { name = "pipeworks_broken_tube_plain.png", backface_culling = false, color = nodecolor } },
 	ends  = { { name = "pipeworks_broken_tube_end.png",   color = nodecolor } },
@@ -35,7 +35,7 @@ pipeworks.register_tube("pipeworks:broken_tube", {
 			local itemstack = puncher:get_wielded_item()
 			local wieldname = itemstack:get_name()
 			local playername = puncher:get_player_name()
-			print("[Pipeworks] "..playername.." struck a broken tube at "..minetest.pos_to_string(pos))
+			local log_msg = playername.." struck a broken tube at "..minetest.pos_to_string(pos).."\n"
 			if   wieldname == "anvil:hammer"
 			  or wieldname == "cottages:hammer"
 			  or wieldname == "glooptest:hammer_steel"
@@ -47,17 +47,17 @@ pipeworks.register_tube("pipeworks:broken_tube", {
 				local meta = minetest.get_meta(pos)
 				local was_node = minetest.deserialize(meta:get_string("the_tube_was"))
 				if was_node and was_node ~= "" then
-					print("            with "..wieldname.." to repair it.")
+					pipeworks.logger(log_msg.."            with "..wieldname.." to repair it.")
 					minetest.swap_node(pos, { name = was_node.name, param2 = was_node.param2 })
 					pipeworks.scan_for_tube_objects(pos)
 					itemstack:add_wear(1000)
 					puncher:set_wielded_item(itemstack)
 					return itemstack
 				else
-					print("            but it can't be repaired.")
+					pipeworks.logger(log_msg.."            but it can't be repaired.")
 				end
 			else
-				print("            with "..wieldname.." but that tool is too weak.")
+				pipeworks.logger(log_msg.."            with "..wieldname.." but that tool is too weak.")
 			end
 		end
 	}
@@ -69,7 +69,7 @@ pipeworks.register_tube("pipeworks:broken_tube", {
 if pipeworks.enable_priority_tube then
 	local color = "#ff3030:128"
 	pipeworks.register_tube("pipeworks:priority_tube", {
-			description = "High Priority Tube Segment",
+			description = S("High Priority Tube Segment"),
 			inventory_image = "pipeworks_tube_inv.png^[colorize:" .. color,
 			plain = { { name = "pipeworks_tube_plain.png", color = nodecolor } },
 			noctr = { { name = "pipeworks_tube_noctr.png", color = nodecolor } },
@@ -82,16 +82,16 @@ if pipeworks.enable_priority_tube then
 	minetest.register_craft( {
 		output = "pipeworks:priority_tube_1 6",
 		recipe = {
-			{ "homedecor:plastic_sheeting", "homedecor:plastic_sheeting", "homedecor:plastic_sheeting" },
+			{ "basic_materials:plastic_sheet", "basic_materials:plastic_sheet", "basic_materials:plastic_sheet" },
 			{ "default:gold_ingot", "", "default:gold_ingot" },
-			{ "homedecor:plastic_sheeting", "homedecor:plastic_sheeting", "homedecor:plastic_sheeting" }
+			{ "basic_materials:plastic_sheet", "basic_materials:plastic_sheet", "basic_materials:plastic_sheet" }
 		},
 	})
 end
 
 if pipeworks.enable_accelerator_tube then
 	pipeworks.register_tube("pipeworks:accelerator_tube", {
-			description = "Accelerating Pneumatic Tube Segment",
+			description = S("Accelerating Pneumatic Tube Segment"),
 			inventory_image = "pipeworks_accelerator_tube_inv.png",
 			plain = { "pipeworks_accelerator_tube_plain.png" },
 			noctr = { "pipeworks_accelerator_tube_noctr.png" },
@@ -107,16 +107,16 @@ if pipeworks.enable_accelerator_tube then
 	minetest.register_craft( {
 		output = "pipeworks:accelerator_tube_1 2",
 		recipe = {
-			{ "homedecor:plastic_sheeting", "homedecor:plastic_sheeting", "homedecor:plastic_sheeting" },
+			{ "basic_materials:plastic_sheet", "basic_materials:plastic_sheet", "basic_materials:plastic_sheet" },
 			{ "default:mese_crystal_fragment", "default:steel_ingot", "default:mese_crystal_fragment" },
-			{ "homedecor:plastic_sheeting", "homedecor:plastic_sheeting", "homedecor:plastic_sheeting" }
+			{ "basic_materials:plastic_sheet", "basic_materials:plastic_sheet", "basic_materials:plastic_sheet" }
 		},
 	})
 end
 
 if pipeworks.enable_crossing_tube then
 	pipeworks.register_tube("pipeworks:crossing_tube", {
-			description = "Crossing Pneumatic Tube Segment",
+			description = S("Crossing Pneumatic Tube Segment"),
 			inventory_image = "pipeworks_crossing_tube_inv.png",
 			plain = { "pipeworks_crossing_tube_plain.png" },
 			noctr = { "pipeworks_crossing_tube_noctr.png" },
@@ -138,7 +138,7 @@ end
 
 if pipeworks.enable_one_way_tube then
 	minetest.register_node("pipeworks:one_way_tube", {
-		description = "One way tube",
+		description = S("One way tube"),
 		tiles = {"pipeworks_one_way_tube_top.png", "pipeworks_one_way_tube_top.png", "pipeworks_one_way_tube_output.png",
 			"pipeworks_one_way_tube_input.png", "pipeworks_one_way_tube_side.png", "pipeworks_one_way_tube_top.png"},
 		paramtype2 = "facedir",
@@ -161,13 +161,16 @@ if pipeworks.enable_one_way_tube then
 		},
 		after_place_node = pipeworks.after_place,
 		after_dig_node = pipeworks.after_dig,
+		on_rotate = pipeworks.on_rotate,
+		check_for_pole = pipeworks.check_for_vert_tube,
+		check_for_horiz_pole = pipeworks.check_for_horiz_tube
 	})
 	minetest.register_craft({
 		output = "pipeworks:one_way_tube 2",
 		recipe = {
-			{ "homedecor:plastic_sheeting", "homedecor:plastic_sheeting", "homedecor:plastic_sheeting" },
-			{ "group:stick", "default:mese_crystal", "homedecor:plastic_sheeting" },
-			{ "homedecor:plastic_sheeting", "homedecor:plastic_sheeting", "homedecor:plastic_sheeting" }
+			{ "basic_materials:plastic_sheet", "basic_materials:plastic_sheet", "basic_materials:plastic_sheet" },
+			{ "group:stick", "default:mese_crystal", "basic_materials:plastic_sheet" },
+			{ "basic_materials:plastic_sheet", "basic_materials:plastic_sheet", "basic_materials:plastic_sheet" }
 		},
 	})
 end

settingtypes.txt

@@ -34,6 +34,9 @@ pipeworks_enable_digiline_detector_tube (Enable Digiline Detector Tube) bool tru
 #Enable mesecon signal conducting tube.
 pipeworks_enable_conductor_tube (Enable Conductor Tube) bool true
 
+#Enable digiline signal conducting tube.
+pipeworks_enable_digiline_conductor_tube (Enable Digiline Conductor Tube) bool true
+
 #Enable accelerator tube.
 pipeworks_enable_accelerator_tube (Enable Accelerator Tube) bool true
 
@@ -60,6 +63,10 @@ pipeworks_enable_one_way_tube (Enable One Way Tube) bool true
 #always go to it if there are multible ways.
 pipeworks_enable_priority_tube (Enable High Priority Tube) bool true
 
+#Enable lua controlled tube.
+#It is comparable with mesecons luacontroller.
+pipeworks_enable_lua_tube (Enable Lua controlled Tube) bool true
+
 #Enable cyclic mode.
 pipeworks_enable_cyclic_mode (Enable Cyclic Mode) bool true
 
@@ -67,4 +74,4 @@ pipeworks_enable_cyclic_mode (Enable Cyclic Mode) bool true
 pipeworks_drop_on_routing_fail (Drop On Routing Fail) bool false
 
 #Delete item on clearobject.
-pipeworks_delete_item_on_clearobject (Delete Item On Clearobject) bool true
+pipeworks_delete_item_on_clearobject (Delete Item On Clearobject) bool true

signal_tubes.lua

@@ -1,7 +1,8 @@
+local S = minetest.get_translator("pipeworks")
 if pipeworks.enable_detector_tube then
 	local detector_tube_step = 5 * tonumber(minetest.settings:get("dedicated_server_step"))
 	pipeworks.register_tube("pipeworks:detector_tube_on", {
-			description = "Detecting Pneumatic Tube Segment on (you hacker you)",
+			description = S("Detecting Pneumatic Tube Segment on"),
 			inventory_image = "pipeworks_detector_tube_inv.png",
 			plain = { "pipeworks_detector_tube_plain.png" },
 			node_def = {
@@ -40,7 +41,7 @@ if pipeworks.enable_detector_tube then
 			},
 	})
 	pipeworks.register_tube("pipeworks:detector_tube_off", {
-			description = "Detecting Pneumatic Tube Segment",
+			description = S("Detecting Pneumatic Tube Segment"),
 			inventory_image = "pipeworks_detector_tube_inv.png",
 			plain = { "pipeworks_detector_tube_plain.png" },
 			node_def = {
@@ -60,16 +61,17 @@ if pipeworks.enable_detector_tube then
 	minetest.register_craft( {
 		output = "pipeworks:detector_tube_off_1 2",
 		recipe = {
-			{ "homedecor:plastic_sheeting", "homedecor:plastic_sheeting", "homedecor:plastic_sheeting" },
+			{ "basic_materials:plastic_sheet", "basic_materials:plastic_sheet", "basic_materials:plastic_sheet" },
 			{ "mesecons:mesecon", "mesecons_materials:silicon", "mesecons:mesecon" },
-			{ "homedecor:plastic_sheeting", "homedecor:plastic_sheeting", "homedecor:plastic_sheeting" }
+			{ "basic_materials:plastic_sheet", "basic_materials:plastic_sheet", "basic_materials:plastic_sheet" }
 		},
 	})
 end
 
-if minetest.get_modpath("digilines") and pipeworks.enable_digiline_detector_tube then
+local digiline_enabled = minetest.get_modpath("digilines") ~= nil
+if digiline_enabled and pipeworks.enable_digiline_detector_tube then
 	pipeworks.register_tube("pipeworks:digiline_detector_tube", {
-			description = "Digiline Detecting Pneumatic Tube Segment",
+			description = S("Digiline Detecting Pneumatic Tube Segment"),
 			inventory_image = "pipeworks_digiline_detector_tube_inv.png",
 			plain = { "pipeworks_digiline_detector_tube_plain.png" },
 			node_def = {
@@ -78,7 +80,7 @@ if minetest.get_modpath("digilines") and pipeworks.enable_digiline_detector_tube
 
 						local setchan = meta:get_string("channel")
 
-						digiline:receptor_send(pos, digiline.rules.default, setchan, stack:to_string())
+						digiline:receptor_send(pos, digiline.rules.default, setchan, stack:to_table())
 
 						return pipeworks.notvel(pipeworks.meseadjlist, velocity)
 					end},
@@ -86,9 +88,9 @@ if minetest.get_modpath("digilines") and pipeworks.enable_digiline_detector_tube
 					local meta = minetest.get_meta(pos)
 					meta:set_string("formspec",
 						"size[8.6,2.2]"..
-						"field[0.6,0.6;8,1;channel;Channel:;${channel}]"..
+						"field[0.6,0.6;8,1;channel;"..S("Channel")..";${channel}]"..
 						"image[0.3,1.3;1,1;pipeworks_digiline_detector_tube_inv.png]"..
-						"label[1.6,1.2;Digiline Detecting Tube]"
+						"label[1.6,1.2;"..S("Digiline Detecting Tube").."]"
 					)
 				end,
 				on_receive_fields = function(pos, formname, fields, sender)
@@ -101,7 +103,10 @@ if minetest.get_modpath("digilines") and pipeworks.enable_digiline_detector_tube
 					receptor = {},
 					effector = {
 						action = function(pos,node,channel,msg) end
-					}
+					},
+					wire = {
+						rules = pipeworks.digilines_rules
+					},
 				},
 			},
 	})
@@ -109,16 +114,16 @@ if minetest.get_modpath("digilines") and pipeworks.enable_digiline_detector_tube
 	minetest.register_craft( {
 		output = "pipeworks:digiline_detector_tube_1 2",
 		recipe = {
-			{ "homedecor:plastic_sheeting", "homedecor:plastic_sheeting", "homedecor:plastic_sheeting" },
+			{ "basic_materials:plastic_sheet", "basic_materials:plastic_sheet", "basic_materials:plastic_sheet" },
 			{ "digilines:wire_std_00000000", "mesecons_materials:silicon", "digilines:wire_std_00000000" },
-			{ "homedecor:plastic_sheeting", "homedecor:plastic_sheeting", "homedecor:plastic_sheeting" }
+			{ "basic_materials:plastic_sheet", "basic_materials:plastic_sheet", "basic_materials:plastic_sheet" }
 		},
 	})
 end
 
 if pipeworks.enable_conductor_tube then
 	pipeworks.register_tube("pipeworks:conductor_tube_off", {
-			description = "Conducting Pneumatic Tube Segment",
+			description = S("Conducting Pneumatic Tube Segment"),
 			inventory_image = "pipeworks_conductor_tube_inv.png",
 			short = "pipeworks_conductor_tube_short.png",
 			plain = { "pipeworks_conductor_tube_plain.png" },
@@ -132,7 +137,7 @@ if pipeworks.enable_conductor_tube then
 			},
 	})
 	pipeworks.register_tube("pipeworks:conductor_tube_on", {
-			description = "Conducting Pneumatic Tube Segment on (you hacker you)",
+			description = S("Conducting Pneumatic Tube Segment on"),
 			inventory_image = "pipeworks_conductor_tube_inv.png",
 			short = "pipeworks_conductor_tube_short.png",
 			plain = { "pipeworks_conductor_tube_on_plain.png" },
@@ -147,14 +152,80 @@ if pipeworks.enable_conductor_tube then
 			},
 	})
 
-	minetest.register_craft( {
-		output = "pipeworks:conductor_tube_off_1 6",
-		recipe = {
-			{ "homedecor:plastic_sheeting", "homedecor:plastic_sheeting", "homedecor:plastic_sheeting" },
-			{ "mesecons:mesecon", "mesecons:mesecon", "mesecons:mesecon" },
-			{ "homedecor:plastic_sheeting", "homedecor:plastic_sheeting", "homedecor:plastic_sheeting" }
-		},
+	minetest.register_craft({
+		type = "shapeless",
+		output = "pipeworks:conductor_tube_off_1",
+		recipe = {"pipeworks:tube_1", "mesecons:mesecon"}
 	})
 end
 
+if digiline_enabled and pipeworks.enable_digiline_conductor_tube then
+	pipeworks.register_tube("pipeworks:digiline_conductor_tube", {
+		description = S("Digiline Conducting Pneumatic Tube Segment"),
+		inventory_image = "pipeworks_tube_inv.png^pipeworks_digiline_conductor_tube_inv.png",
+		short = "pipeworks_tube_short.png^pipeworks_digiline_conductor_tube_short.png",
+		plain = {"pipeworks_tube_plain.png^pipeworks_digiline_conductor_tube_plain.png"},
+		noctr = {"pipeworks_tube_noctr.png^pipeworks_digiline_conductor_tube_noctr.png"},
+		ends = {"pipeworks_tube_end.png^pipeworks_digiline_conductor_tube_end.png"},
+		node_def = {digiline = {wire = {rules = pipeworks.digilines_rules}}},
+	})
+	minetest.register_craft({
+		type = "shapeless",
+		output = "pipeworks:digiline_conductor_tube_1",
+		recipe = {"pipeworks:tube_1", "digilines:wire_std_00000000"}
+	})
+end
 
+if digiline_enabled and pipeworks.enable_digiline_conductor_tube and
+		pipeworks.enable_conductor_tube then
+	pipeworks.register_tube("pipeworks:mesecon_and_digiline_conductor_tube_off", {
+		description = S("Mesecon and Digiline Conducting Pneumatic Tube Segment"),
+		inventory_image = "pipeworks_conductor_tube_inv.png^pipeworks_digiline_conductor_tube_inv.png",
+		short = "pipeworks_conductor_tube_short.png^pipeworks_digiline_conductor_tube_short.png",
+		plain = {"pipeworks_conductor_tube_plain.png^pipeworks_digiline_conductor_tube_plain.png"},
+		noctr = {"pipeworks_conductor_tube_noctr.png^pipeworks_digiline_conductor_tube_noctr.png"},
+		ends = {"pipeworks_conductor_tube_end.png^pipeworks_digiline_conductor_tube_end.png"},
+		node_def = {
+			digiline = {wire = {rules = pipeworks.digilines_rules}},
+			groups = {mesecon = 2},
+			mesecons = {conductor = {
+				state = "off",
+				rules = pipeworks.mesecons_rules,
+				onstate = "pipeworks:mesecon_and_digiline_conductor_tube_on_#id"
+			}},
+		},
+	})
+	pipeworks.register_tube("pipeworks:mesecon_and_digiline_conductor_tube_on", {
+		description = S("Mesecon and Digiline Conducting Pneumatic Tube Segment on"),
+		inventory_image = "pipeworks_conductor_tube_inv.png^pipeworks_digiline_conductor_tube_inv.png",
+		short = "pipeworks_conductor_tube_short.png^pipeworks_digiline_conductor_tube_short.png",
+		plain = {"pipeworks_conductor_tube_on_plain.png^pipeworks_digiline_conductor_tube_plain.png"},
+		noctr = {"pipeworks_conductor_tube_on_noctr.png^pipeworks_digiline_conductor_tube_noctr.png"},
+		ends = {"pipeworks_conductor_tube_on_end.png^pipeworks_digiline_conductor_tube_end.png"},
+		node_def = {
+			digiline = {wire = {rules = pipeworks.digilines_rules}},
+			groups = {mesecon = 2, not_in_creative_inventory = 1},
+			drop = "pipeworks:mesecon_and_digiline_conductor_tube_off_1",
+			mesecons = {conductor = {
+				state = "on",
+				rules = pipeworks.mesecons_rules,
+				offstate = "pipeworks:mesecon_and_digiline_conductor_tube_off_#id"}
+			},
+		},
+	})
+	minetest.register_craft({
+		type = "shapeless",
+		output = "pipeworks:mesecon_and_digiline_conductor_tube_off_1",
+		recipe = {"pipeworks:tube_1", "mesecons:mesecon", "digilines:wire_std_00000000"}
+	})
+	minetest.register_craft({
+		type = "shapeless",
+		output = "pipeworks:mesecon_and_digiline_conductor_tube_off_1",
+		recipe = {"pipeworks:conductor_tube_off_1", "digilines:wire_std_00000000"}
+	})
+	minetest.register_craft({
+		type = "shapeless",
+		output = "pipeworks:mesecon_and_digiline_conductor_tube_off_1",
+		recipe = {"pipeworks:digiline_conductor_tube_1", "mesecons:mesecon"}
+	})
+end

signs_compat.lua

@@ -0,0 +1,241 @@
+-- This file adds placement rules for signs_lib, if present
+
+local spv = {
+	[4] = true,
+	[6] = true,
+	[8] = true,
+	[10] = true,
+	[13] = true,
+	[15] = true,
+	[17] = true,
+	[19] = true
+}
+
+local sphns = {
+	[1] = true,
+	[3] = true,
+	[5] = true,
+	[7] = true,
+	[9] = true,
+	[11] = true,
+	[21] = true,
+	[23] = true
+}
+
+local sphew = {
+	[0] = true,
+	[2] = true,
+	[12] = true,
+	[14] = true,
+	[16] = true,
+	[18] = true,
+	[20] = true,
+	[22] = true
+}
+
+local owtv = {
+	[5] = true,
+	[7] = true,
+	[9] = true,
+	[11] = true,
+	[12] = true,
+	[14] = true,
+	[16] = true,
+	[18] = true
+}
+
+local owtns = {
+	[0] = true,
+	[2] = true,
+	[4] = true,
+	[6] = true,
+	[8] = true,
+	[10] = true,
+	[20] = true,
+	[22] = true
+}
+
+local owtew = {
+	[1] = true,
+	[3] = true,
+	[13] = true,
+	[15] = true,
+	[17] = true,
+	[19] = true,
+	[21] = true,
+	[23] = true
+}
+
+local vert_n = {
+	[3] = {[5] = true},
+	[6] = {[9] = true, [12] = true, [16] = true},
+	[7] = {[9] = true, [11] = true},
+}
+
+local vert_e = {
+	[3] = {[5] = true},
+	[6] = {[5] = true, [9] = true, [16] = true},
+	[7] = {[7] = true, [11] = true},
+}
+
+local vert_s = {
+	[3] = {[5] = true},
+	[6] = {[5] = true, [12] = true, [16] = true},
+	[7] = {[5] = true, [7] = true},
+}
+
+local vert_w = {
+	[3] = {[5] = true},
+	[6] = {[5] = true, [9] = true, [12] = true},
+	[7] = {[5] = true, [9] = true},
+}
+
+local horiz_n = {
+	[3] = {[0] = true},
+	[6] = {[0] = true, [4] = true, [20] = true},
+	[7] = {[2] = true, [10] = true},
+	[8] = {[0] = true},
+	[9] = {[2] = true},
+}
+
+local horiz_e = {
+	[3] = {[1] = true},
+	[6] = {[1] = true, [17] = true, [21] = true},
+	[7] = {[3] = true, [19] = true},
+	[8] = {[1] = true},
+	[9] = {[3] = true},
+}
+
+local horiz_s = {
+	[3] = {[0] = true},
+	[6] = {[0] = true, [8] = true, [20] = true},
+	[7] = {[0] = true, [4] = true},
+	[8] = {[0] = true},
+	[9] = {[0] = true},
+}
+
+local horiz_w = {
+	[3] = {[1] = true},
+	[6] = {[1] = true, [13] = true, [21] = true},
+	[7] = {[1] = true, [13] = true},
+	[8] = {[1] = true},
+	[9] = {[1] = true},
+}
+
+local function get_sign_dir(node, def)
+	if (node.param2 == 4 and def.paramtype2 == "wallmounted")
+	  or (node.param2 == 0 and def.paramtype2 ~= "wallmounted") then
+		return {["N"] = true}
+	elseif (node.param2 == 2 and def.paramtype2 == "wallmounted")
+	  or (node.param2 == 1 and def.paramtype2 ~= "wallmounted") then
+		return {["E"] = true}
+	elseif (node.param2 == 5 and def.paramtype2 == "wallmounted")
+	  or (node.param2 == 2 and def.paramtype2 ~= "wallmounted") then
+		return {["S"] = true}
+	elseif node.param2 == 3 then
+		return {["W"] = true}
+	end
+	return {}
+end
+
+--[[
+In the functions below:
+
+ pos: the (real) position of the placed sign
+ node: the sign node itself
+ def: its definition
+
+ ppos: the position of the pointed node (pipe/tube)
+ pnode: the node itself
+ pdef: its definition
+
+--]]
+
+
+-- pipes
+
+function pipeworks.check_for_vert_pipe(pos, node, def, ppos, pnode, pdef)
+	local signdir = get_sign_dir(node, def)
+	local pipenumber = pdef.pipenumber
+	local pipedir = pnode.param2
+	if string.find(pnode.name, "straight_pipe") and spv[pipedir] then
+		return true
+	elseif signdir["N"] and vert_n[pipenumber] and vert_n[pipenumber][pipedir] then
+		return true
+	elseif signdir["E"] and vert_e[pipenumber] and vert_e[pipenumber][pipedir] then
+		return true
+	elseif signdir["S"] and vert_s[pipenumber] and vert_s[pipenumber][pipedir] then
+		return true
+	elseif signdir["W"] and vert_w[pipenumber] and vert_w[pipenumber][pipedir] then
+		return true
+	end
+end
+
+function pipeworks.check_for_horiz_pipe(pos, node, def, ppos, pnode, pdef)
+	local signdir = get_sign_dir(node, def)
+	local pipenumber = pdef.pipenumber
+	local pipedir = pnode.param2
+	if string.find(pnode.name, "straight_pipe") then
+		if (signdir["N"] or signdir["S"]) and sphns[pipedir] then
+			return true
+		elseif (signdir["E"] or signdir["W"]) and sphew[pipedir] then
+			return true
+		end
+	elseif signdir["N"] and horiz_n[pipenumber] and horiz_n[pipenumber][pipedir] then
+		return true
+	elseif signdir["E"] and horiz_e[pipenumber] and horiz_e[pipenumber][pipedir] then
+		return true
+	elseif signdir["S"] and horiz_s[pipenumber] and horiz_s[pipenumber][pipedir] then
+		return true
+	elseif signdir["W"] and horiz_w[pipenumber] and horiz_w[pipenumber][pipedir] then
+		return true
+	end
+end
+
+-- tubes
+
+function pipeworks.check_for_vert_tube(pos, node, def, ppos, pnode, pdef)
+	local signdir = get_sign_dir(node, def)
+	local tubenumber = pdef.tubenumber
+	local tubedir = pnode.param2
+	if pnode.name == "pipeworks:one_way_tube" and owtv[tubedir] then
+		return true
+	elseif tubenumber == 2 and (tubedir == 5 or tubedir == 7) then -- it's a stub pointing up or down
+		return true
+	elseif signdir["N"] and vert_n[tubenumber] and vert_n[tubenumber][tubedir] then
+		return true
+	elseif signdir["E"] and vert_e[tubenumber] and vert_e[tubenumber][tubedir] then
+		return true
+	elseif signdir["S"] and vert_s[tubenumber] and vert_s[tubenumber][tubedir] then
+		return true
+	elseif signdir["W"] and vert_w[tubenumber] and vert_w[tubenumber][tubedir] then
+		return true
+	end
+end
+
+function pipeworks.check_for_horiz_tube(pos, node, def, ppos, pnode, pdef)
+	local signdir = get_sign_dir(node, def)
+	local tubenumber = pdef.tubenumber
+	local tubedir = pnode.param2
+	if tubenumber == 2 then -- it'a a stub pointing sideways
+		if (tubedir == 0 or tubedir == 2) and (signdir["N"] or signdir["S"]) then
+			return true
+		elseif (tubedir == 1 or tubedir == 3) and (signdir["E"] or signdir["W"]) then
+			return true
+		end
+	elseif pnode.name == "pipeworks:one_way_tube" then
+		if (signdir["N"] or signdir["S"]) and owtns[tubedir] then
+			return true
+		elseif (signdir["E"] or signdir["W"]) and owtew[tubedir] then
+			return true
+		end
+	elseif signdir["N"] and horiz_n[tubenumber] and horiz_n[tubenumber][tubedir] then
+		return true
+	elseif signdir["E"] and horiz_e[tubenumber] and horiz_e[tubenumber][tubedir] then
+		return true
+	elseif signdir["S"] and horiz_s[tubenumber] and horiz_s[tubenumber][tubedir] then
+		return true
+	elseif signdir["W"] and horiz_w[tubenumber] and horiz_w[tubenumber][tubedir] then
+		return true
+	end
+end

sorting_tubes.lua

@@ -1,3 +1,4 @@
+local S = minetest.get_translator("pipeworks")
 local fs_helpers = pipeworks.fs_helpers
 
 if pipeworks.enable_mese_tube then
@@ -55,7 +56,7 @@ if pipeworks.enable_mese_tube then
 	end
 
 	pipeworks.register_tube("pipeworks:mese_tube", {
-			description = "Sorting Pneumatic Tube Segment",
+			description = S("Sorting Pneumatic Tube Segment"),
 			inventory_image = "pipeworks_mese_tube_inv.png",
 			noctr = {"pipeworks_mese_tube_noctr_1.png", "pipeworks_mese_tube_noctr_2.png", "pipeworks_mese_tube_noctr_3.png",
 				"pipeworks_mese_tube_noctr_4.png", "pipeworks_mese_tube_noctr_5.png", "pipeworks_mese_tube_noctr_6.png"},
@@ -107,7 +108,7 @@ if pipeworks.enable_mese_tube then
 						inv:set_size("line"..tostring(i), 6*1)
 					end
 					update_formspec(pos)
-					meta:set_string("infotext", "Sorting pneumatic tube")
+					meta:set_string("infotext", S("Sorting pneumatic tube"))
 				end,
 				on_punch = update_formspec,
 				on_receive_fields = function(pos, formname, fields, sender)
@@ -153,9 +154,9 @@ if pipeworks.enable_mese_tube then
 	minetest.register_craft( {
 		output = "pipeworks:mese_tube_000000 2",
 		recipe = {
-			{ "homedecor:plastic_sheeting", "homedecor:plastic_sheeting", "homedecor:plastic_sheeting" },
+			{ "basic_materials:plastic_sheet", "basic_materials:plastic_sheet", "basic_materials:plastic_sheet" },
 			{ "", "default:mese_crystal", "" },
-			{ "homedecor:plastic_sheeting", "homedecor:plastic_sheeting", "homedecor:plastic_sheeting" }
+			{ "basic_materials:plastic_sheet", "basic_materials:plastic_sheet", "basic_materials:plastic_sheet" }
 		},
 	})
 

teleport_tube.lua

@@ -1,10 +1,11 @@
+local S = minetest.get_translator("pipeworks")
 local filename=minetest.get_worldpath() .. "/teleport_tubes"
 
 local tp_tube_db = nil -- nil forces a read
 local tp_tube_db_version = 2.0
 
 local function hash(pos)
-	return string.format("%d", minetest.hash_node_position(pos))
+	return string.format("%.30g", minetest.hash_node_position(pos))
 end
 
 local function save_tube_db()
@@ -22,7 +23,7 @@ end
 local function migrate_tube_db()
 		local tmp_db = {}
 		tp_tube_db.version = nil
-		for key, val in pairs(tp_tube_db) do
+		for _, val in pairs(tp_tube_db) do
 			if(val.channel ~= "") then -- skip unconfigured tubes
 				tmp_db[hash(val)] = val
 			end
@@ -50,6 +51,11 @@ local function read_tube_db()
 	return tp_tube_db
 end
 
+-- debug formatter for coordinates used below
+local fmt = function(pos)
+	return pos.x..", "..pos.y..", "..pos.z
+end
+
 -- updates or adds a tube
 local function set_tube(pos, channel, can_receive)
 	local tubes = tp_tube_db or read_tube_db()
@@ -63,6 +69,19 @@ local function set_tube(pos, channel, can_receive)
 	end
 
 	-- we haven't found any tp tube to update, so lets add it
+	-- but sanity check that the hash has not already been inserted.
+	-- if so, complain very loudly and refuse the update so the player knows something is amiss.
+	-- to catch regressions of https://github.com/minetest-mods/pipeworks/issues/166
+	local existing = tp_tube_db[hash]
+	if  existing ~= nil then
+		local e = "error"
+		minetest.log(e, "pipeworks teleport tube update refused due to position hash collision")
+		minetest.log(e, "collided hash: "..hash)
+		minetest.log(e, "tried-to-place tube: "..fmt(pos))
+		minetest.log(e, "existing tube: "..fmt(existing))
+		return
+	end
+
 	tp_tube_db[hash] = {x=pos.x,y=pos.y,z=pos.z,channel=channel,cr=can_receive}
 	save_tube_db()
 end
@@ -109,19 +128,19 @@ local function update_meta(meta, can_receive)
 	meta:set_int("can_receive", can_receive and 1 or 0)
 	local cr_state = can_receive and "on" or "off"
 	meta:set_string("formspec","size[8.6,2.2]"..
-			"field[0.6,0.6;7,1;channel;Channel:;${channel}]"..
-			"label[7.3,0;Receive]"..
+			"field[0.6,0.6;7,1;channel;"..S("Channel")..";${channel}]"..
+			"label[7.3,0;"..S("Receive").."]"..
 			"image_button[7.3,0.3;1,0.6;pipeworks_button_" .. cr_state .. ".png;cr" .. (can_receive and 0 or 1) .. ";;;false;pipeworks_button_interm.png]"..
 			"image[0.3,1.3;1,1;pipeworks_teleport_tube_inv.png]"..
-			"label[1.6,1.2;channels are public by default]" ..
-			"label[1.6,1.5;use <player>:<channel> for fully private channels]" ..
-			"label[1.6,1.8;use <player>\\;<channel> for private receivers]" ..
+			"label[1.6,1.2;"..S("channels are public by default").."]" ..
+			"label[1.6,1.5;"..S("use <player>:<channel> for fully private channels").."]" ..
+			"label[1.6,1.8;"..S("use <player>\\;<channel> for private receivers").."]" ..
 			default.gui_bg..
 			default.gui_bg_img)
 end
 
 pipeworks.register_tube("pipeworks:teleport_tube", {
-	description = "Teleporting Pneumatic Tube Segment",
+	description = S("Teleporting Pneumatic Tube Segment"),
 	inventory_image = "pipeworks_teleport_tube_inv.png",
 	noctr = { "pipeworks_teleport_tube_noctr.png" },
 	plain = { "pipeworks_teleport_tube_plain.png" },
@@ -151,7 +170,7 @@ pipeworks.register_tube("pipeworks:teleport_tube", {
 		on_construct = function(pos)
 			local meta = minetest.get_meta(pos)
 			update_meta(meta, true)
-			meta:set_string("infotext", "unconfigured Teleportation Tube")
+			meta:set_string("infotext", S("unconfigured Teleportation Tube"))
 		end,
 		on_receive_fields = function(pos,formname,fields,sender)
 			if not fields.channel -- ignore escaping or clientside manipulation of the form
@@ -171,12 +190,14 @@ pipeworks.register_tube("pipeworks:teleport_tube", {
 				if name and mode and name ~= sender_name then
 					--channels starting with '[name]:' can only be used by the named player
 					if mode == ":" then
-						minetest.chat_send_player(sender_name, "Sorry, channel '"..new_channel.."' is reserved for exclusive use by "..name)
+						minetest.chat_send_player(sender_name, S("Sorry, channel '@1' is reserved for exclusive use by @2",
+							new_channel, name))
 						return
-				
+
 					--channels starting with '[name];' can be used by other players, but cannot be received from
 					elseif mode == ";" and (fields.cr1 or (can_receive ~= 0 and not fields.cr0)) then
-						minetest.chat_send_player(sender_name, "Sorry, receiving from channel '"..new_channel.."' is reserved for "..name)
+						minetest.chat_send_player(sender_name, S("Sorry, receiving from channel '@1' is reserved for @2",
+							new_channel, name))
 						return
 					end
 				end
@@ -208,11 +229,11 @@ pipeworks.register_tube("pipeworks:teleport_tube", {
 				if channel ~= "" then
 					set_tube(pos, channel, can_receive)
 					local cr_description = (can_receive == 1) and "sending and receiving" or "sending"
-					meta:set_string("infotext", string.format("Teleportation Tube %s on '%s'", cr_description, channel))
+					meta:set_string("infotext", S("Teleportation Tube @1 on '@2'", cr_description, channel))
 				else
 					-- remove empty channel tubes, to not have to search through them
 					remove_tube(pos)
-					meta:set_string("infotext", "unconfigured Teleportation Tube")
+					meta:set_string("infotext", S("unconfigured Teleportation Tube"))
 				end
 			end
 		end,
@@ -224,9 +245,9 @@ pipeworks.register_tube("pipeworks:teleport_tube", {
 minetest.register_craft( {
 	output = "pipeworks:teleport_tube_1 2",
 	recipe = {
-	        { "homedecor:plastic_sheeting", "homedecor:plastic_sheeting", "homedecor:plastic_sheeting" },
+	        { "basic_materials:plastic_sheet", "basic_materials:plastic_sheet", "basic_materials:plastic_sheet" },
 	        { "default:desert_stone", "default:mese", "default:desert_stone" },
-	        { "homedecor:plastic_sheeting", "homedecor:plastic_sheeting", "homedecor:plastic_sheeting" }
+	        { "basic_materials:plastic_sheet", "basic_materials:plastic_sheet", "basic_materials:plastic_sheet" }
 	},
 })
 
@@ -240,3 +261,11 @@ if minetest.get_modpath("mesecons_mvps") ~= nil then
 		end
 	end)
 end
+
+-- Expose teleport tube database API for other mods
+pipeworks.tptube = {
+	hash = hash,
+	save_tube_db = save_tube_db,
+	get_db = function() return tp_tube_db or read_tube_db() end,
+	tp_tube_db_version = tp_tube_db_version
+}