Rend les items du groupe limitcraft non craftable par l'autocrafter

Fix setter issue, add dynamic/static option

Add player height. Properties aren't adaptive yet

LICENSE

@@ -500,3 +500,194 @@ necessary.  Here is a sample; alter the names:
   Ty Coon, President of Vice
 
 That's all there is to it!
+
+
+--------------------------------------------------------------------------------
+
+Some code in lua_tube.lua is copied from The Mesecons Mod for Minetest:
+
+License of source code
+----------------------
+Copyright (C) 2011-2016 Mesecons Mod Developer Team and contributors
+
+This program is free software; you can redistribute the Mesecons Mod and/or
+modify it under the terms of the GNU Lesser General Public License version 3
+published by the Free Software Foundation.
+
+This library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with this library; if not, write to the
+Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
+Boston, MA  02110-1301, USA.
+
+
+GNU LESSER GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+
+  This version of the GNU Lesser General Public License incorporates
+the terms and conditions of version 3 of the GNU General Public
+License, supplemented by the additional permissions listed below.
+
+  0. Additional Definitions.
+
+  As used herein, "this License" refers to version 3 of the GNU Lesser
+General Public License, and the "GNU GPL" refers to version 3 of the GNU
+General Public License.
+
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+other than an Application or a Combined Work as defined below.
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+   b) Give prominent notice with the combined library that part of it
+   is a work based on the Library, and explaining where to find the
+   accompanying uncombined form of the same work.
+
+  6. Revised Versions of the GNU Lesser General Public License.
+
+  The Free Software Foundation may publish revised and/or new versions
+of the GNU Lesser General Public License from time to time. Such new
+versions will be similar in spirit to the present version, but may
+differ in detail to address new problems or concerns.
+
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+Library.
+

autocrafter.lua

@@ -66,8 +66,11 @@ local function run_autocrafter(pos, elapsed)
 	local inventory = meta:get_inventory()
 	local craft = get_craft(pos, inventory)
 	local output_item = craft.output.item
+	-- NALC: existence de limitgroup ?
+	local limitcraft = minetest.get_item_group(output_item:get_name(), "limitcraft") or 0
 	-- only use crafts that have an actual result
-	if output_item:is_empty() then
+	-- NALC: ou si l'item n'est pas dans le group limitcraft
+	if output_item:is_empty() or limitcraft > 0 then
 		meta:set_string("infotext", "unconfigured Autocrafter: unknown recipe")
 		return false
 	end

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

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

@@ -157,3 +157,134 @@ 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
+			_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(),
+	}
+	local _trash
+	-- 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)
+	_trash, p.move_to = 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)
+
+	-- 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
@@ -62,7 +63,7 @@ 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
 					if v.pos.x == pos.x and v.pos.y == pos.y and v.pos.z == pos.z then
@@ -71,13 +72,13 @@ minetest.register_on_player_receive_fields(function(player, formname, fields)
 				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
 				fs_helpers.on_receive_fields(pos, fields)
@@ -142,6 +143,7 @@ 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
@@ -191,9 +193,9 @@ override = {
 	after_dig_node = pipeworks.after_dig
 }
 --[[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]]

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 = {
@@ -148,4 +155,18 @@ if minetest.get_modpath("homedecor") == nil then
 	})
 end
 
+-- crafting items for creating node breakers
+minetest.register_craftitem("pipeworks:gear", {
+	description = "Gear",
+	inventory_image = "pipeworks_gear.png",
+})
+
+minetest.register_craft( {
+        output = "pipeworks:gear 6",
+        recipe = {
+                { "", 			"default:steel_ingot",	"" },
+                { "default:steel_ingot","default:stone",	"default:steel_ingot" },
+                { "",			"default:steel_ingot",	"" }
+        },
+})
 

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

devices.lua

@@ -1,3 +1,7 @@
+local new_flow_logic_register = pipeworks.flowables.register
+
+local polys = ""
+if pipeworks.enable_lowpoly then polys = "_lowpoly" end
 
 -- rotation handlers
 
@@ -68,7 +72,7 @@ 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
@@ -129,10 +133,11 @@ for s in ipairs(states) do
 		dgroups = {snappy=3, pipe=1, not_in_creative_inventory=1}
 	end
 
-	minetest.register_node("pipeworks:pump_"..states[s], {
+	local pumpname = "pipeworks:pump_"..states[s]
+	minetest.register_node(pumpname, {
 		description = "Pump/Intake Module",
 		drawtype = "mesh",
-		mesh = "pipeworks_pump.obj",
+		mesh = "pipeworks_pump"..polys..".obj",
 		tiles = { "pipeworks_pump_"..states[s]..".png" },
 		paramtype = "light",
 		paramtype2 = "facedir",
@@ -149,23 +154,33 @@ 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", {
+
+	-- 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 = "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",
@@ -188,24 +203,30 @@ 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", {
+local nodename_valve_loaded = "pipeworks:valve_on_loaded"
+minetest.register_node(nodename_valve_loaded, {
 	description = "Valve",
 	drawtype = "mesh",
-	mesh = "pipeworks_valve_on.obj",
+	mesh = "pipeworks_valve_on"..polys..".obj",
 	tiles = { "pipeworks_valve.png" },
 	sunlight_propagates = true,
 	paramtype = "light",
@@ -228,21 +249,28 @@ 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",
 	tiles = {
@@ -275,10 +303,11 @@ minetest.register_node("pipeworks:grating", {
 
 -- outlet spigot
 
-minetest.register_node("pipeworks:spigot", {
+local nodename_spigot_empty = "pipeworks:spigot"
+minetest.register_node(nodename_spigot_empty, {
 	description = "Spigot outlet",
 	drawtype = "mesh",
-	mesh = "pipeworks_spigot.obj",
+	mesh = "pipeworks_spigot"..polys..".obj",
 	tiles = { "pipeworks_spigot.png" },
 	sunlight_propagates = true,
 	paramtype = "light",
@@ -305,10 +334,11 @@ minetest.register_node("pipeworks:spigot", {
 	on_rotate = pipeworks.fix_after_rotation
 })
 
-minetest.register_node("pipeworks:spigot_pouring", {
+local nodename_spigot_loaded = "pipeworks:spigot_pouring"
+minetest.register_node(nodename_spigot_loaded, {
 	description = "Spigot outlet",
 	drawtype = "mesh",
-	mesh = "pipeworks_spigot_pouring.obj",
+	mesh = "pipeworks_spigot_pouring"..polys..".obj",
 	tiles = {
 		{
 			name = "default_water_flowing_animated.png",
@@ -347,6 +377,17 @@ 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)
@@ -359,10 +400,11 @@ local panel_cbox = {
 	}
 }
 
-minetest.register_node("pipeworks:entry_panel_empty", {
+local nodename_panel_empty = "pipeworks:entry_panel_empty"
+minetest.register_node(nodename_panel_empty, {
 	description = "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",
@@ -378,10 +420,11 @@ minetest.register_node("pipeworks:entry_panel_empty", {
 	on_rotate = pipeworks.fix_after_rotation
 })
 
-minetest.register_node("pipeworks:entry_panel_loaded", {
+local nodename_panel_loaded = "pipeworks:entry_panel_loaded"
+minetest.register_node(nodename_panel_loaded, {
 	description = "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",
@@ -397,11 +440,17 @@ 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", {
+
+
+local nodename_sensor_empty = "pipeworks:flow_sensor_empty"
+minetest.register_node(nodename_sensor_empty, {
 	description = "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",
@@ -436,10 +485,11 @@ minetest.register_node("pipeworks:flow_sensor_empty", {
 	on_rotate = pipeworks.fix_after_rotation
 })
 
-minetest.register_node("pipeworks:flow_sensor_loaded", {
+local nodename_sensor_loaded = "pipeworks:flow_sensor_loaded"
+minetest.register_node(nodename_sensor_loaded, {
 	description = "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",
@@ -474,9 +524,17 @@ 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 sgroups = {snappy=3, pipe=1, tankfill=fill+1}
@@ -547,10 +605,11 @@ end
 
 -- fountainhead
 
-minetest.register_node("pipeworks:fountainhead", {
+local nodename_fountain_empty = "pipeworks:fountainhead"
+minetest.register_node(nodename_fountain_empty, {
 	description = "Fountainhead",
 	drawtype = "mesh",
-	mesh = "pipeworks_fountainhead.obj",
+	mesh = "pipeworks_fountainhead"..polys..".obj",
 	tiles = { "pipeworks_fountainhead.png" },
 	sunlight_propagates = true,
 	paramtype = "light",
@@ -580,10 +639,11 @@ minetest.register_node("pipeworks:fountainhead", {
 	on_rotate = false
 })
 
-minetest.register_node("pipeworks:fountainhead_pouring", {
+local nodename_fountain_loaded = "pipeworks:fountainhead_pouring"
+minetest.register_node(nodename_fountain_loaded, {
 	description = "Fountainhead",
 	drawtype = "mesh",
-	mesh = "pipeworks_fountainhead.obj",
+	mesh = "pipeworks_fountainhead"..polys..".obj",
 	tiles = { "pipeworks_fountainhead.png" },
 	sunlight_propagates = true,
 	paramtype = "light",
@@ -614,6 +674,66 @@ 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 = "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_wood_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
+})
+
+local nodename_sp_loaded = "pipeworks:straight_pipe_loaded"
+minetest.register_node(nodename_sp_loaded, {
+	description = "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_wood_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
+})
+
+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")

filter-injector.lua

@@ -115,7 +115,7 @@ local function grabAndFire(data,slotseq_mode,exmatch_mode,filtmeta,frominv,fromi
 			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)
+				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
@@ -146,7 +146,7 @@ local function grabAndFire(data,slotseq_mode,exmatch_mode,filtmeta,frominv,fromi
 				end
 				if fromtube.remove_items then
 					-- it could be the entire stack...
-					item = fromtube.remove_items(frompos, fromnode, stack, dir, count)
+					item = fromtube.remove_items(frompos, fromnode, stack, dir, count, frominvname, spos)
 				else
 					item = stack:take_item(count)
 					frominv:set_stack(frominvname, spos, stack)
@@ -156,7 +156,7 @@ local function grabAndFire(data,slotseq_mode,exmatch_mode,filtmeta,frominv,fromi
 				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)
+				local item1 = pipeworks.tube_inject_item(pos, start_pos, dir, item, fakePlayer:get_player_name())
 				return true-- only fire one item, please
 			end
 	end
@@ -167,11 +167,9 @@ 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)
@@ -219,7 +217,7 @@ local function punch_filter(data, filtpos, filtnode, msg)
 	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)
@@ -317,8 +315,16 @@ local function punch_filter(data, filtpos, filtnode, msg)
 		exact_match = 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
 	for _, frominvname in ipairs(type(fromtube.input_inventory) == "table" and fromtube.input_inventory or {fromtube.input_inventory}) do
 		local done = false
@@ -378,12 +384,22 @@ for _, data in ipairs({
 		end,
 		after_dig_node = pipeworks.after_dig,
 		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
@@ -481,3 +497,64 @@ if minetest.get_modpath("digilines") then
 		},
 	})
 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)

init.lua

@@ -14,7 +14,6 @@ pipeworks.worldpath = minetest.get_worldpath()
 pipeworks.modpath = minetest.get_modpath("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 +21,9 @@ 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
 
@@ -38,6 +40,7 @@ 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"
 
@@ -89,9 +92,18 @@ 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
+
 dofile(pipeworks.modpath.."/common.lua")
 dofile(pipeworks.modpath.."/models.lua")
 dofile(pipeworks.modpath.."/autoplace_pipes.lua")
@@ -110,14 +122,26 @@ 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
+
 if pipeworks.enable_redefines then
 	dofile(pipeworks.modpath.."/compat-chests.lua")
 	dofile(pipeworks.modpath.."/compat-furnaces.lua")
 end
 if pipeworks.enable_autocrafter then dofile(pipeworks.modpath.."/autocrafter.lua") end
+if pipeworks.enable_lua_tube then dofile(pipeworks.modpath.."/lua_tube.lua") end
 
 minetest.register_alias("pipeworks:pipe", "pipeworks:pipe_110000_empty")
 

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
@@ -49,12 +50,93 @@ 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))
+			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
+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
+		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 +150,30 @@ 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,
@@ -151,7 +207,7 @@ minetest.register_entity("pipeworks:tubed_item", {
 			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 +220,7 @@ 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 +252,12 @@ 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 +293,15 @@ 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 +322,7 @@ 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 +331,14 @@ 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 +350,29 @@ 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))
+					dropped_item:set_velocity(vector.multiply(velocity, 5))
 					self:remove()
 					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
@@ -317,11 +388,11 @@ if minetest.get_modpath("mesecons_mvps") then
 		end
 		for id, 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

@@ -36,7 +36,7 @@ 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

lua_tube.lua

@@ -0,0 +1,859 @@
+--        ______
+--       |
+--       |
+--       |        __       ___  _   __         _  _
+-- |   | |       |  | |\ |  |  |_| |  | |  |  |_ |_|
+-- |___| |______ |__| | \|  |  | \ |__| |_ |_ |_ |\  tube
+-- |
+-- |
+--
+
+-- Reference
+-- ports = get_real_port_states(pos): gets if inputs are powered from outside
+-- newport = merge_port_states(state1, state2): just does result = state1 or state2 for every port
+-- set_port(pos, rule, state): activates/deactivates the mesecons according to the port states
+-- set_port_states(pos, ports): Applies new port states to a Luacontroller at pos
+-- run(pos): runs the code in the controller at pos
+-- reset_meta(pos, code, errmsg): performs a software-reset, installs new code and prints error messages
+-- resetn(pos): performs a hardware reset, turns off all ports
+--
+-- The Sandbox
+-- The whole code of the controller runs in a sandbox,
+-- a very restricted environment.
+-- Actually the only way to damage the server is to
+-- use too much memory from the sandbox.
+-- You can add more functions to the environment
+-- (see where local env is defined)
+-- Something nice to play is is appending minetest.env to it.
+
+local BASENAME = "pipeworks:lua_tube"
+
+local rules = {
+	red    = {x = -1, y =  0, z =  0, name = "red"},
+	blue   = {x =  1, y =  0, z =  0, name = "blue"},
+	yellow = {x =  0, y = -1, z =  0, name = "yellow"},
+	green  = {x =  0, y =  1, z =  0, name = "green"},
+	black  = {x =  0, y =  0, z = -1, name = "black"},
+	white  = {x =  0, y =  0, z =  1, name = "white"},
+}
+
+
+------------------
+-- Action stuff --
+------------------
+-- These helpers are required to set the port states of the lua_tube
+
+local function update_real_port_states(pos, rule_name, new_state)
+	local meta = minetest.get_meta(pos)
+	if rule_name == nil then
+		meta:set_int("real_portstates", 1)
+		return
+	end
+	local n = meta:get_int("real_portstates") - 1
+	local L = {}
+	for i = 1, 6 do
+		L[i] = n % 2
+		n = math.floor(n / 2)
+	end
+	--                  (0,0,-1) (0,-1,0) (-1,0,0)      (1,0,0) (0,1,0) (0,0,1)
+	local pos_to_side = {  5,        3,       1,   nil,    2,      4,      6  }
+	if rule_name.x == nil then
+		for _, rname in ipairs(rule_name) do
+			local port = pos_to_side[rname.x + (2 * rname.y) + (3 * rname.z) + 4]
+			L[port] = (newstate == "on") and 1 or 0
+		end
+	else
+		local port = pos_to_side[rule_name.x + (2 * rule_name.y) + (3 * rule_name.z) + 4]
+		L[port] = (new_state == "on") and 1 or 0
+	end
+	meta:set_int("real_portstates",
+		 1 +
+		 1 * L[1] +
+		 2 * L[2] +
+		 4 * L[3] +
+		 8 * L[4] +
+		16 * L[5] +
+		32 * L[6])
+end
+
+
+local port_names = {"red", "blue", "yellow", "green", "black", "white"}
+
+local function get_real_port_states(pos)
+	-- Determine if ports are powered (by itself or from outside)
+	local meta = minetest.get_meta(pos)
+	local L = {}
+	local n = meta:get_int("real_portstates") - 1
+	for _, name in ipairs(port_names) do
+		L[name] = ((n % 2) == 1)
+		n = math.floor(n / 2)
+	end
+	return L
+end
+
+
+local function merge_port_states(ports, vports)
+	return {
+		red    = ports.red    or vports.red,
+		blue   = ports.blue   or vports.blue,
+		yellow = ports.yellow or vports.yellow,
+		green  = ports.green  or vports.green,
+		black  = ports.black  or vports.black,
+		white  = ports.white  or vports.white,
+	}
+end
+
+local function generate_name(ports)
+	local red    = ports.red    and 1 or 0
+	local blue   = ports.blue   and 1 or 0
+	local yellow = ports.yellow and 1 or 0
+	local green  = ports.green  and 1 or 0
+	local black  = ports.black  and 1 or 0
+	local white  = ports.white  and 1 or 0
+	return BASENAME..white..black..green..yellow..blue..red
+end
+
+
+local function set_port(pos, rule, state)
+	if state then
+		mesecon.receptor_on(pos, {rule})
+	else
+		mesecon.receptor_off(pos, {rule})
+	end
+end
+
+
+local function clean_port_states(ports)
+	ports.red    = ports.red    and true or false
+	ports.blue   = ports.blue   and true or false
+	ports.yellow = ports.yellow and true or false
+	ports.green  = ports.green  and true or false
+	ports.black  = ports.black  and true or false
+	ports.white  = ports.white  and true or false
+end
+
+
+local function set_port_states(pos, ports)
+	local node = minetest.get_node(pos)
+	local name = node.name
+	clean_port_states(ports)
+	local vports = minetest.registered_nodes[name].virtual_portstates
+	local new_name = generate_name(ports)
+
+	if name ~= new_name and vports then
+		-- Problem:
+		-- We need to place the new node first so that when turning
+		-- off some port, it won't stay on because the rules indicate
+		-- there is an onstate output port there.
+		-- When turning the output off then, it will however cause feedback
+		-- so that the lua_tube will receive an "off" event by turning
+		-- its output off.
+		-- Solution / Workaround:
+		-- Remember which output was turned off and ignore next "off" event.
+		local meta = minetest.get_meta(pos)
+		local ign = minetest.deserialize(meta:get_string("ignore_offevents")) or {}
+		if ports.red    and not vports.red    and not mesecon.is_powered(pos, rules.red)    then ign.red    = true end
+		if ports.blue   and not vports.blue   and not mesecon.is_powered(pos, rules.blue)   then ign.blue   = true end
+		if ports.yellow and not vports.yellow and not mesecon.is_powered(pos, rules.yellow) then ign.yellow = true end
+		if ports.green  and not vports.green  and not mesecon.is_powered(pos, rules.green)  then ign.green  = true end
+		if ports.black  and not vports.black  and not mesecon.is_powered(pos, rules.black)  then ign.black  = true end
+		if ports.white  and not vports.white  and not mesecon.is_powered(pos, rules.white)  then ign.white  = true end
+		meta:set_string("ignore_offevents", minetest.serialize(ign))
+
+		minetest.swap_node(pos, {name = new_name, param2 = node.param2})
+
+		if ports.red    ~= vports.red    then set_port(pos, rules.red,    ports.red)    end
+		if ports.blue   ~= vports.blue   then set_port(pos, rules.blue,   ports.blue)   end
+		if ports.yellow ~= vports.yellow then set_port(pos, rules.yellow, ports.yellow) end
+		if ports.green  ~= vports.green  then set_port(pos, rules.green,  ports.green)  end
+		if ports.black  ~= vports.black  then set_port(pos, rules.black,  ports.black)  end
+		if ports.white  ~= vports.white  then set_port(pos, rules.white,  ports.white)  end
+	end
+end
+
+
+-----------------
+-- Overheating --
+-----------------
+local function burn_controller(pos)
+	local node = minetest.get_node(pos)
+	node.name = BASENAME.."_burnt"
+	minetest.swap_node(pos, node)
+	minetest.get_meta(pos):set_string("lc_memory", "");
+	-- Wait for pending operations
+	minetest.after(0.2, mesecon.receptor_off, pos, mesecon.rules.flat)
+end
+
+local function overheat(pos, meta)
+	if mesecon.do_overheat(pos) then -- If too hot
+		burn_controller(pos)
+		return true
+	end
+end
+
+------------------------
+-- Ignored off events --
+------------------------
+
+local function ignore_event(event, meta)
+	if event.type ~= "off" then return false end
+	local ignore_offevents = minetest.deserialize(meta:get_string("ignore_offevents")) or {}
+	if ignore_offevents[event.pin.name] then
+		ignore_offevents[event.pin.name] = nil
+		meta:set_string("ignore_offevents", minetest.serialize(ignore_offevents))
+		return true
+	end
+end
+
+-------------------------
+-- Parsing and running --
+-------------------------
+
+local function safe_print(param)
+	print(dump(param))
+end
+
+local function safe_date()
+	return(os.date("*t",os.time()))
+end
+
+-- string.rep(str, n) with a high value for n can be used to DoS
+-- the server. Therefore, limit max. length of generated string.
+local function safe_string_rep(str, n)
+	if #str * n > mesecon.setting("luacontroller_string_rep_max", 64000) then
+		debug.sethook() -- Clear hook
+		error("string.rep: string length overflow", 2)
+	end
+
+	return string.rep(str, n)
+end
+
+-- string.find with a pattern can be used to DoS the server.
+-- Therefore, limit string.find to patternless matching.
+local function safe_string_find(...)
+	if (select(4, ...)) ~= true then
+		debug.sethook() -- Clear hook
+		error("string.find: 'plain' (fourth parameter) must always be true in a lua controlled tube")
+	end
+
+	return string.find(...)
+end
+
+local function remove_functions(x)
+	local tp = type(x)
+	if tp == "function" then
+		return nil
+	end
+
+	-- Make sure to not serialize the same table multiple times, otherwise
+	-- writing mem.test = mem in the lua controlled tube will lead to infinite recursion
+	local seen = {}
+
+	local function rfuncs(x)
+		if seen[x] then return end
+		seen[x] = true
+		if type(x) ~= "table" then return end
+
+		for key, value in pairs(x) do
+			if type(key) == "function" or type(value) == "function" then
+				x[key] = nil
+			else
+				if type(key) == "table" then
+					rfuncs(key)
+				end
+				if type(value) == "table" then
+					rfuncs(value)
+				end
+			end
+		end
+	end
+
+	rfuncs(x)
+
+	return x
+end
+
+local function get_interrupt(pos)
+	-- iid = interrupt id
+	local function interrupt(time, iid)
+		if type(time) ~= "number" then return end
+		local luac_id = minetest.get_meta(pos):get_int("luac_id")
+		mesecon.queue:add_action(pos, "pipeworks:lc_tube_interrupt", {luac_id, iid}, time, iid, 1)
+	end
+	return interrupt
+end
+
+
+local function get_digiline_send(pos)
+	if not digiline then return end
+	return function(channel, msg)
+		-- Make sure channel is string, number or boolean
+		if (type(channel) ~= "string" and type(channel) ~= "number" and type(channel) ~= "boolean") then
+			return false
+		end
+
+		-- It is technically possible to send functions over the wire since
+		-- the high performance impact of stripping those from the data has
+		-- been decided to not be worth the added realism.
+		-- Make sure serialized version of the data is not insanely long to
+		-- prevent DoS-like attacks
+		local msg_ser = minetest.serialize(msg)
+		if #msg_ser > mesecon.setting("luacontroller_digiline_maxlen", 50000) then
+			return false
+		end
+
+		minetest.after(0, function()
+			digilines.receptor_send(pos, digiline.rules.default, channel, msg)
+		end)
+		return true
+	end
+end
+
+
+local safe_globals = {
+	"assert", "error", "ipairs", "next", "pairs", "select",
+	"tonumber", "tostring", "type", "unpack", "_VERSION"
+}
+
+local function create_environment(pos, mem, event)
+	-- Gather variables for the environment
+	local vports = minetest.registered_nodes[minetest.get_node(pos).name].virtual_portstates
+	local vports_copy = {}
+	for k, v in pairs(vports) do vports_copy[k] = v end
+	local rports = get_real_port_states(pos)
+
+	-- Create new library tables on each call to prevent one Luacontroller
+	-- from breaking a library and messing up other Luacontrollers.
+	local env = {
+		pin = merge_port_states(vports, rports),
+		port = vports_copy,
+		event = event,
+		mem = mem,
+		heat = mesecon.get_heat(pos),
+		heat_max = mesecon.setting("overheat_max", 20),
+		print = safe_print,
+		interrupt = get_interrupt(pos),
+		digiline_send = get_digiline_send(pos),
+		string = {
+			byte = string.byte,
+			char = string.char,
+			format = string.format,
+			len = string.len,
+			lower = string.lower,
+			upper = string.upper,
+			rep = safe_string_rep,
+			reverse = string.reverse,
+			sub = string.sub,
+			find = safe_string_find,
+		},
+		math = {
+			abs = math.abs,
+			acos = math.acos,
+			asin = math.asin,
+			atan = math.atan,
+			atan2 = math.atan2,
+			ceil = math.ceil,
+			cos = math.cos,
+			cosh = math.cosh,
+			deg = math.deg,
+			exp = math.exp,
+			floor = math.floor,
+			fmod = math.fmod,
+			frexp = math.frexp,
+			huge = math.huge,
+			ldexp = math.ldexp,
+			log = math.log,
+			log10 = math.log10,
+			max = math.max,
+			min = math.min,
+			modf = math.modf,
+			pi = math.pi,
+			pow = math.pow,
+			rad = math.rad,
+			random = math.random,
+			sin = math.sin,
+			sinh = math.sinh,
+			sqrt = math.sqrt,
+			tan = math.tan,
+			tanh = math.tanh,
+		},
+		table = {
+			concat = table.concat,
+			insert = table.insert,
+			maxn = table.maxn,
+			remove = table.remove,
+			sort = table.sort,
+		},
+		os = {
+			clock = os.clock,
+			difftime = os.difftime,
+			time = os.time,
+			datetable = safe_date,
+		},
+	}
+	env._G = env
+
+	for _, name in pairs(safe_globals) do
+		env[name] = _G[name]
+	end
+
+	return env
+end
+
+
+local function timeout()
+	debug.sethook() -- Clear hook
+	error("Code timed out!", 2)
+end
+
+
+local function create_sandbox(code, env)
+	if code:byte(1) == 27 then
+		return nil, "Binary code prohibited."
+	end
+	local f, msg = loadstring(code)
+	if not f then return nil, msg end
+	setfenv(f, env)
+
+	-- Turn off JIT optimization for user code so that count
+	-- events are generated when adding debug hooks
+	if rawget(_G, "jit") then
+		jit.off(f, true)
+	end
+
+	return function(...)
+		-- Use instruction counter to stop execution
+		-- after luacontroller_maxevents
+		local maxevents = mesecon.setting("luacontroller_maxevents", 10000)
+		debug.sethook(timeout, "", maxevents)
+		local ok, ret = pcall(f, ...)
+		debug.sethook()  -- Clear hook
+		if not ok then error(ret, 0) end
+		return ret
+	end
+end
+
+
+local function load_memory(meta)
+	return minetest.deserialize(meta:get_string("lc_memory")) or {}
+end
+
+
+local function save_memory(pos, meta, mem)
+	local memstring = minetest.serialize(remove_functions(mem))
+	local memsize_max = mesecon.setting("luacontroller_memsize", 100000)
+
+	if (#memstring <= memsize_max) then
+		meta:set_string("lc_memory", memstring)
+	else
+		print("Error: lua_tube memory overflow. "..memsize_max.." bytes available, "
+				..#memstring.." required. Controller overheats.")
+		burn_controller(pos)
+	end
+end
+
+
+local function run(pos, event)
+	local meta = minetest.get_meta(pos)
+	if overheat(pos) then return end
+	if ignore_event(event, meta) then return end
+
+	-- Load code & mem from meta
+	local mem  = load_memory(meta)
+	local code = meta:get_string("code")
+
+	-- Create environment
+	local env = create_environment(pos, mem, event)
+
+	-- Create the sandbox and execute code
+	local f, msg = create_sandbox(code, env)
+	if not f then return false, msg end
+	local succ, msg = pcall(f)
+	if not succ then return false, msg end
+	if type(env.port) ~= "table" then
+		return false, "Ports set are invalid."
+	end
+
+	-- Actually set the ports
+	set_port_states(pos, env.port)
+
+	-- Save memory. This may burn the luacontroller if a memory overflow occurs.
+	save_memory(pos, meta, env.mem)
+
+	return succ, msg
+end
+
+mesecon.queue:add_function("pipeworks:lc_tube_interrupt", function (pos, luac_id, iid)
+	-- There is no lua_tube anymore / it has been reprogrammed / replaced / burnt
+	if (minetest.get_meta(pos):get_int("luac_id") ~= luac_id) then return end
+	if (minetest.registered_nodes[minetest.get_node(pos).name].is_burnt) then return end
+	run(pos, {type = "interrupt", iid = iid})
+end)
+
+local function reset_meta(pos, code, errmsg)
+	local meta = minetest.get_meta(pos)
+	meta:set_string("code", code)
+	code = minetest.formspec_escape(code or "")
+	errmsg = minetest.formspec_escape(tostring(errmsg or ""))
+	meta:set_string("formspec", "size[12,10]"..
+		"background[-0.2,-0.25;12.4,10.75;jeija_luac_background.png]"..
+		"textarea[0.2,0.2;12.2,9.5;code;;"..code.."]"..
+		"image_button[4.75,8.75;2.5,1;jeija_luac_runbutton.png;program;]"..
+		"image_button_exit[11.72,-0.25;0.425,0.4;jeija_close_window.png;exit;]"..
+		"label[0.1,9;"..errmsg.."]")
+	meta:set_int("luac_id", math.random(1, 65535))
+end
+
+local function reset(pos)
+	set_port_states(pos, {red = false, blue = false, yellow = false,
+		green = false, black = false, white = false})
+end
+
+
+-----------------------
+-- Node Registration --
+-----------------------
+
+local output_rules = {}
+local input_rules = {}
+
+local node_box = {
+	type = "fixed",
+	fixed = {
+		pipeworks.tube_leftstub[1],   -- tube segment against -X face
+		pipeworks.tube_rightstub[1],  -- tube segment against +X face
+		pipeworks.tube_bottomstub[1], -- tube segment against -Y face
+		pipeworks.tube_topstub[1],    -- tube segment against +Y face
+		pipeworks.tube_frontstub[1],  -- tube segment against -Z face
+		pipeworks.tube_backstub[1],   -- tube segment against +Z face
+	}
+}
+
+local selection_box = {
+	type = "fixed",
+	fixed = pipeworks.tube_selectboxes,
+}
+
+local digiline = {
+	receptor = {},
+	effector = {
+		action = function(pos, node, channel, msg)
+			run(pos, {type = "digiline", channel = channel, msg = msg})
+		end
+	}
+}
+local function on_receive_fields(pos, form_name, fields, sender)
+	if not fields.program then
+		return
+	end
+	local name = sender:get_player_name()
+	if minetest.is_protected(pos, name) and not minetest.check_player_privs(name, {protection_bypass=true}) then
+		minetest.record_protection_violation(pos, name)
+		return
+	end
+	reset(pos)
+	reset_meta(pos, fields.code)
+	local succ, err = run(pos, {type="program"})
+	if not succ then
+		print(err)
+		reset_meta(pos, fields.code, err)
+	end
+end
+
+local function go_back(velocity)
+	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 speed = math.abs(velocity.x + velocity.y + velocity.z)
+	if speed == 0 then
+		speed = 1
+	end
+	local vel = {x = velocity.x/speed, y = velocity.y/speed, z = velocity.z/speed,speed=speed}
+	if speed >= 4.1 then
+		speed = 4
+	elseif speed >= 1.1 then
+		speed = speed - 0.1
+	else
+		speed = 1
+	end
+	vel.speed = speed
+	return pipeworks.notvel(adjlist, vel)
+end
+
+local tiles_base = {
+	"pipeworks_mese_tube_plain_4.png", "pipeworks_mese_tube_plain_3.png",
+	"pipeworks_mese_tube_plain_2.png", "pipeworks_mese_tube_plain_1.png",
+	"pipeworks_mese_tube_plain_6.png", "pipeworks_mese_tube_plain_5.png"}
+
+for red    = 0, 1 do -- 0 = off  1 = on
+for blue   = 0, 1 do
+for yellow = 0, 1 do
+for green  = 0, 1 do
+for black  = 0, 1 do
+for white  = 0, 1 do
+	local cid = tostring(white)..tostring(black)..tostring(green)..
+			tostring(yellow)..tostring(blue)..tostring(red)
+	local node_name = BASENAME..cid
+	local tiles = table.copy(tiles_base)
+	if red == 1 then
+		tiles[1] = tiles[1].."^(pipeworks_lua_tube_port_on.png^[transformR90)"
+		tiles[2] = tiles[2].."^(pipeworks_lua_tube_port_on.png^[transformR90)"
+		tiles[5] = tiles[5].."^(pipeworks_lua_tube_port_on.png^[transformR270)"
+		tiles[6] = tiles[6].."^(pipeworks_lua_tube_port_on.png^[transformR90)"
+	else
+		tiles[1] = tiles[1].."^(pipeworks_lua_tube_port_off.png^[transformR90)"
+		tiles[2] = tiles[2].."^(pipeworks_lua_tube_port_off.png^[transformR90)"
+		tiles[5] = tiles[5].."^(pipeworks_lua_tube_port_off.png^[transformR270)"
+		tiles[6] = tiles[6].."^(pipeworks_lua_tube_port_off.png^[transformR90)"
+	end
+	if blue == 1 then
+		tiles[1] = tiles[1].."^(pipeworks_lua_tube_port_on.png^[transformR270)"
+		tiles[2] = tiles[2].."^(pipeworks_lua_tube_port_on.png^[transformR270)"
+		tiles[5] = tiles[5].."^(pipeworks_lua_tube_port_on.png^[transformR90)"
+		tiles[6] = tiles[6].."^(pipeworks_lua_tube_port_on.png^[transformR270)"
+	else
+		tiles[1] = tiles[1].."^(pipeworks_lua_tube_port_off.png^[transformR270)"
+		tiles[2] = tiles[2].."^(pipeworks_lua_tube_port_off.png^[transformR270)"
+		tiles[5] = tiles[5].."^(pipeworks_lua_tube_port_off.png^[transformR90)"
+		tiles[6] = tiles[6].."^(pipeworks_lua_tube_port_off.png^[transformR270)"
+	end
+	if yellow == 1 then
+		tiles[3] = tiles[3].."^(pipeworks_lua_tube_port_on.png^[transformR180)"
+		tiles[4] = tiles[4].."^(pipeworks_lua_tube_port_on.png^[transformR180)"
+		tiles[5] = tiles[5].."^(pipeworks_lua_tube_port_on.png^[transformR180)"
+		tiles[6] = tiles[6].."^(pipeworks_lua_tube_port_on.png^[transformR180)"
+	else
+		tiles[3] = tiles[3].."^(pipeworks_lua_tube_port_off.png^[transformR180)"
+		tiles[4] = tiles[4].."^(pipeworks_lua_tube_port_off.png^[transformR180)"
+		tiles[5] = tiles[5].."^(pipeworks_lua_tube_port_off.png^[transformR180)"
+		tiles[6] = tiles[6].."^(pipeworks_lua_tube_port_off.png^[transformR180)"
+	end
+	if green == 1 then
+		tiles[3] = tiles[3].."^pipeworks_lua_tube_port_on.png"
+		tiles[4] = tiles[4].."^pipeworks_lua_tube_port_on.png"
+		tiles[5] = tiles[5].."^pipeworks_lua_tube_port_on.png"
+		tiles[6] = tiles[6].."^pipeworks_lua_tube_port_on.png"
+	else
+		tiles[3] = tiles[3].."^pipeworks_lua_tube_port_off.png"
+		tiles[4] = tiles[4].."^pipeworks_lua_tube_port_off.png"
+		tiles[5] = tiles[5].."^pipeworks_lua_tube_port_off.png"
+		tiles[6] = tiles[6].."^pipeworks_lua_tube_port_off.png"
+	end
+	if black == 1 then
+		tiles[1] = tiles[1].."^(pipeworks_lua_tube_port_on.png^[transformR180)"
+		tiles[2] = tiles[2].."^pipeworks_lua_tube_port_on.png"
+		tiles[3] = tiles[3].."^(pipeworks_lua_tube_port_on.png^[transformR90)"
+		tiles[4] = tiles[4].."^(pipeworks_lua_tube_port_on.png^[transformR270)"
+	else
+		tiles[1] = tiles[1].."^(pipeworks_lua_tube_port_off.png^[transformR180)"
+		tiles[2] = tiles[2].."^pipeworks_lua_tube_port_off.png"
+		tiles[3] = tiles[3].."^(pipeworks_lua_tube_port_off.png^[transformR90)"
+		tiles[4] = tiles[4].."^(pipeworks_lua_tube_port_off.png^[transformR270)"
+	end
+	if white == 1 then
+		tiles[1] = tiles[1].."^pipeworks_lua_tube_port_on.png"
+		tiles[2] = tiles[2].."^(pipeworks_lua_tube_port_on.png^[transformR180)"
+		tiles[3] = tiles[3].."^(pipeworks_lua_tube_port_on.png^[transformR270)"
+		tiles[4] = tiles[4].."^(pipeworks_lua_tube_port_on.png^[transformR90)"
+	else
+		tiles[1] = tiles[1].."^pipeworks_lua_tube_port_off.png"
+		tiles[2] = tiles[2].."^(pipeworks_lua_tube_port_off.png^[transformR180)"
+		tiles[3] = tiles[3].."^(pipeworks_lua_tube_port_off.png^[transformR270)"
+		tiles[4] = tiles[4].."^(pipeworks_lua_tube_port_off.png^[transformR90)"
+	end
+
+	local groups = {snappy = 3, tube = 1, tubedevice = 1, overheat = 1}
+	if red + blue + yellow + green + black + white ~= 0 then
+		groups.not_in_creative_inventory = 1
+	end
+
+	output_rules[cid] = {}
+	input_rules[cid] = {}
+	if red    == 1 then table.insert(output_rules[cid], rules.red)    end
+	if blue   == 1 then table.insert(output_rules[cid], rules.blue)   end
+	if yellow == 1 then table.insert(output_rules[cid], rules.yellow) end
+	if green  == 1 then table.insert(output_rules[cid], rules.green)  end
+	if black  == 1 then table.insert(output_rules[cid], rules.black)  end
+	if white  == 1 then table.insert(output_rules[cid], rules.white)  end
+
+	if red    == 0 then table.insert( input_rules[cid], rules.red)    end
+	if blue   == 0 then table.insert( input_rules[cid], rules.blue)   end
+	if yellow == 0 then table.insert( input_rules[cid], rules.yellow) end
+	if green  == 0 then table.insert( input_rules[cid], rules.green)  end
+	if black  == 0 then table.insert( input_rules[cid], rules.black)  end
+	if white  == 0 then table.insert( input_rules[cid], rules.white)  end
+
+	local mesecons = {
+		effector = {
+			rules = input_rules[cid],
+			action_change = function (pos, _, rule_name, new_state)
+				update_real_port_states(pos, rule_name, new_state)
+				run(pos, {type=new_state, pin=rule_name})
+			end,
+		},
+		receptor = {
+			state = mesecon.state.on,
+			rules = output_rules[cid]
+		}
+	}
+
+	minetest.register_node(node_name, {
+		description = "Lua controlled Tube",
+		drawtype = "nodebox",
+		tiles = tiles,
+		paramtype = "light",
+		groups = groups,
+		drop = BASENAME.."000000",
+		sunlight_propagates = true,
+		selection_box = selection_box,
+		node_box = node_box,
+		on_construct = reset_meta,
+		on_receive_fields = on_receive_fields,
+		sounds = default.node_sound_wood_defaults(),
+		mesecons = mesecons,
+		digiline = digiline,
+		-- Virtual portstates are the ports that
+		-- the node shows as powered up (light up).
+		virtual_portstates = {
+			red    = red    == 1,
+			blue   = blue   == 1,
+			yellow = yellow == 1,
+			green  = green  == 1,
+			black  = black  == 1,
+			white  = white  == 1,
+		},
+		after_dig_node = function(pos, node)
+			mesecon.do_cooldown(pos)
+			mesecon.receptor_off(pos, output_rules)
+			pipeworks.after_dig(pos, node)
+		end,
+		is_luacontroller = true,
+		tubelike = 1,
+		tube = {
+			connect_sides = {front = 1, back = 1, left = 1, right = 1, top = 1, bottom = 1},
+			priority = 50,
+			can_go = function(pos, node, velocity, stack)
+				local src = {name = nil}
+				-- add color of the incoming tube explicitly; referring to rules, in case they change later
+				for color, rule in pairs(rules) do
+					if (-velocity.x == rule.x and -velocity.y == rule.y and -velocity.z == rule.z) then
+						src.name = rule.name
+						break
+					end
+				end
+				local succ, msg = run(pos, {
+					type = "item",
+					pin = src,
+					itemstring = stack:to_string(),
+					item = stack:to_table(),
+					velocity = velocity,
+				})
+				if not succ or type(msg) ~= "string" then
+					return go_back(velocity)
+				end
+				local r = rules[msg]
+				return r and {r} or go_back(velocity)
+			end,
+		},
+		after_place_node = pipeworks.after_place,
+		on_blast = function(pos, intensity)
+			if not intensity or intensity > 1 + 3^0.5 then
+				minetest.remove_node(pos)
+				return {string.format("%s_%s", name, dropname)}
+			end
+			minetest.swap_node(pos, {name = "pipeworks:broken_tube_1"})
+			pipeworks.scan_for_tube_objects(pos)
+		end,
+		on_blast = function(pos, intensity)
+			if not intensity or intensity > 1 + 3^0.5 then
+				minetest.remove_node(pos)
+				return {string.format("%s_%s", name, dropname)}
+			end
+			minetest.swap_node(pos, {name = "pipeworks:broken_tube_1"})
+			pipeworks.scan_for_tube_objects(pos)
+		end,
+	})
+end
+end
+end
+end
+end
+end
+
+------------------------------------
+-- Overheated Lua controlled Tube --
+------------------------------------
+
+local tiles_burnt = table.copy(tiles_base)
+tiles_burnt[1] = tiles_burnt[1].."^(pipeworks_lua_tube_port_burnt.png^[transformR90)"
+tiles_burnt[2] = tiles_burnt[2].."^(pipeworks_lua_tube_port_burnt.png^[transformR90)"
+tiles_burnt[5] = tiles_burnt[5].."^(pipeworks_lua_tube_port_burnt.png^[transformR270)"
+tiles_burnt[6] = tiles_burnt[6].."^(pipeworks_lua_tube_port_burnt.png^[transformR90)"
+tiles_burnt[1] = tiles_burnt[1].."^(pipeworks_lua_tube_port_burnt.png^[transformR270)"
+tiles_burnt[2] = tiles_burnt[2].."^(pipeworks_lua_tube_port_burnt.png^[transformR270)"
+tiles_burnt[5] = tiles_burnt[5].."^(pipeworks_lua_tube_port_burnt.png^[transformR90)"
+tiles_burnt[6] = tiles_burnt[6].."^(pipeworks_lua_tube_port_burnt.png^[transformR270)"
+tiles_burnt[3] = tiles_burnt[3].."^(pipeworks_lua_tube_port_burnt.png^[transformR180)"
+tiles_burnt[4] = tiles_burnt[4].."^(pipeworks_lua_tube_port_burnt.png^[transformR180)"
+tiles_burnt[5] = tiles_burnt[5].."^(pipeworks_lua_tube_port_burnt.png^[transformR180)"
+tiles_burnt[6] = tiles_burnt[6].."^(pipeworks_lua_tube_port_burnt.png^[transformR180)"
+tiles_burnt[3] = tiles_burnt[3].."^pipeworks_lua_tube_port_burnt.png"
+tiles_burnt[4] = tiles_burnt[4].."^pipeworks_lua_tube_port_burnt.png"
+tiles_burnt[5] = tiles_burnt[5].."^pipeworks_lua_tube_port_burnt.png"
+tiles_burnt[6] = tiles_burnt[6].."^pipeworks_lua_tube_port_burnt.png"
+tiles_burnt[1] = tiles_burnt[1].."^(pipeworks_lua_tube_port_burnt.png^[transformR180)"
+tiles_burnt[2] = tiles_burnt[2].."^pipeworks_lua_tube_port_burnt.png"
+tiles_burnt[3] = tiles_burnt[3].."^(pipeworks_lua_tube_port_burnt.png^[transformR90)"
+tiles_burnt[4] = tiles_burnt[4].."^(pipeworks_lua_tube_port_burnt.png^[transformR270)"
+tiles_burnt[1] = tiles_burnt[1].."^pipeworks_lua_tube_port_burnt.png"
+tiles_burnt[2] = tiles_burnt[2].."^(pipeworks_lua_tube_port_burnt.png^[transformR180)"
+tiles_burnt[3] = tiles_burnt[3].."^(pipeworks_lua_tube_port_burnt.png^[transformR270)"
+tiles_burnt[4] = tiles_burnt[4].."^(pipeworks_lua_tube_port_burnt.png^[transformR90)"
+
+minetest.register_node(BASENAME .. "_burnt", {
+	drawtype = "nodebox",
+	tiles = tiles_burnt,
+	is_burnt = true,
+	paramtype = "light",
+	groups = {snappy = 3, tube = 1, tubedevice = 1, not_in_creative_inventory=1},
+	drop = BASENAME.."000000",
+	sunlight_propagates = true,
+	selection_box = selection_box,
+	node_box = node_box,
+	on_construct = reset_meta,
+	on_receive_fields = on_receive_fields,
+	sounds = default.node_sound_wood_defaults(),
+	virtual_portstates = {red = false, blue = false, yellow = false,
+		green = false, black = false, white = false},
+	mesecons = {
+		effector = {
+			rules = mesecon.rules.alldirs,
+			action_change = function(pos, _, rule_name, new_state)
+				update_real_port_states(pos, rule_name, new_state)
+			end,
+		},
+	},
+	tubelike = 1,
+	tube = {
+		connect_sides = {front = 1, back = 1, left = 1, right = 1, top = 1, bottom = 1},
+		priority = 50,
+	},
+	after_place_node = pipeworks.after_place,
+	after_dig_node = pipeworks.after_dig,
+	on_blast = function(pos, intensity)
+		if not intensity or intensity > 1 + 3^0.5 then
+			minetest.remove_node(pos)
+			return {string.format("%s_%s", name, dropname)}
+		end
+		minetest.swap_node(pos, {name = "pipeworks:broken_tube_1"})
+		pipeworks.scan_for_tube_objects(pos)
+	end,
+})
+
+------------------------
+-- Craft Registration --
+------------------------
+
+minetest.register_craft({
+	type = "shapeless",
+	output = BASENAME.."000000",
+	recipe = {"pipeworks:mese_tube_000000", "mesecons_luacontroller:luacontroller0000"},
+})

luaentity.lua

@@ -74,7 +74,7 @@ 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 +114,9 @@ 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 +186,43 @@ 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)
+	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)
@@ -314,7 +314,7 @@ 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
+		if vector.distance(pos, entity:get_pos()) <= radius then
 			objects[index] = entity
 			index = index + 1
 		end
@@ -329,11 +329,11 @@ local move_entities_globalstep_part2 = function(dtime)
 		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._pos = vector.add(vector.add(
 				entity._pos,

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
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+vt 0.7045 0.4318
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+vt 0.9015 0.2879
+vt 0.9015 0.2727
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+vt 0.7500 0.2727
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+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
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+vn 0.7173 0.2971 -0.6302
+vn 0.7173 0.2971 0.6302
+vn 0.2971 0.7173 -0.6302
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+vn -0.2971 0.7173 0.6302
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+vn 0.9239 -0.3827 0.0000
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+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
+f 7/21/6 5/22/6 2/23/6 1/24/6
+f 12/25/1 10/26/1 24/27/1 22/28/1 20/29/1 18/30/1 16/31/1 14/32/1
+f 9/33/3 11/34/3 13/35/3 15/36/3 17/37/3 19/38/3 21/39/3 23/40/3
+f 44/41/1 42/42/1 56/43/1 54/44/1 52/45/1 50/46/1 48/47/1 46/48/1
+f 41/49/3 43/50/3 45/51/3 47/52/3 49/53/3 51/54/3 53/55/3 55/56/3
+s 1
+f 9/57/7 10/58/8 12/59/9 11/60/10
+f 11/60/10 12/59/9 14/61/11 13/62/12
+f 13/62/12 14/61/11 16/63/13 15/64/14
+f 15/65/14 16/66/13 18/67/15 17/68/16
+f 17/68/16 18/67/15 20/69/17 19/70/18
+f 19/70/18 20/69/17 22/71/19 21/72/20
+f 21/72/20 22/71/19 24/73/21 23/74/22
+f 23/74/22 24/73/21 10/58/8 9/57/7
+f 43/75/10 44/76/9 46/77/11 45/78/12
+f 41/79/7 42/80/8 44/76/9 43/75/10
+f 45/78/12 46/77/11 48/81/13 47/82/14
+f 47/83/14 48/84/13 50/85/15 49/86/16
+f 49/86/16 50/85/15 52/87/17 51/88/18
+f 51/88/18 52/87/17 54/89/19 53/90/20
+f 53/90/20 54/89/19 56/91/21 55/92/22
+f 55/92/22 56/91/21 42/80/8 41/79/7
+f 32/93/23 34/94/24 33/95/24 31/96/23
+f 32/93/23 31/96/23 29/97/25 30/98/25
+f 27/99/26 25/100/27 26/101/27 28/102/26
+f 34/94/24 36/103/28 35/104/28 33/95/24
+f 38/105/29 40/106/30 39/107/30 37/108/29
+f 38/105/29 37/108/29 35/104/28 36/103/28
+f 29/109/25 27/99/26 28/102/26 30/110/25
+f 25/100/27 39/107/30 40/106/30 26/101/27

models/pipeworks_flow_sensor_lowpoly.obj

@@ -0,0 +1,220 @@
+# Blender v2.78 (sub 0) OBJ File: 'pipe-flow-sensor-lowpoly.blend'
+# www.blender.org
+o Cube.001_Cube.001_None
+v -0.187500 0.187500 0.250000
+v -0.187500 0.187500 -0.250000
+v -0.187500 -0.187500 -0.250000
+v -0.187500 -0.187500 0.250000
+v 0.187500 0.187500 -0.250000
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models/pipeworks_pipe_10_lowpoly.obj

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models/pipeworks_pipe_3_lowpoly.obj

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models/pipeworks_spigot_lowpoly.obj

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models/pipeworks_spigot_pouring_lowpoly.obj

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models/pipeworks_valve_on_lowpoly.obj

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pipes.lua

@@ -5,6 +5,11 @@ local REGISTER_COMPATIBILITY = true
 local pipes_empty_nodenames = {}
 local pipes_full_nodenames = {}
 
+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
@@ -31,12 +36,10 @@ for index, connects in ipairs(cconnects) do
 	
 	local pgroups = {snappy = 3, pipe = 1, not_in_creative_inventory = 1}
 	local pipedesc = "Pipe segement".." "..dump(connects).."... You hacker, you."
-	local image = nil
 
 	if #connects == 0 then
 		pgroups = {snappy = 3, tube = 1}
 		pipedesc = "Pipe segment"
-		image = "pipeworks_pipe_inv.png"
 	end
 	
 	local outimg_e = { "pipeworks_pipe_plain.png" }
@@ -47,10 +50,10 @@ for index, connects in ipairs(cconnects) do
 		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 +62,6 @@ 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 = {
@@ -116,8 +117,12 @@ for index, connects in ipairs(cconnects) do
 		on_rotate = false
 	})
 	
-	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
 
 
@@ -129,8 +134,6 @@ 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)",
 		groups = {not_in_creative_inventory = 1, pipe_to_update = 1},
 		drop = "pipeworks:pipe_1_empty",
@@ -144,7 +147,6 @@ 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 +184,31 @@ 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,
@@ -227,3 +246,6 @@ minetest.register_abm({
 	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 +1,368 @@
+-- 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 index, 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 index, 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.
+
+	-- pressure handles to average over
+	local connections = {}
+	-- 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
+
+	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 = nil
+	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 index, 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! nodename="..nodename.." 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 index, 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

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

@@ -67,7 +67,8 @@ if pipeworks.enable_detector_tube then
 	})
 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",
 			inventory_image = "pipeworks_digiline_detector_tube_inv.png",
@@ -147,14 +148,80 @@ 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 = "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 = "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 = "Mesecon and Digiline Conducting Pneumatic Tube Segment on (you hacker you)",
+		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

teleport_tube.lua

@@ -4,7 +4,7 @@ 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()
@@ -50,6 +50,11 @@ 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 +68,19 @@ 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

todo/pressure_logic.txt

@@ -0,0 +1,33 @@
+-- (may not be possible) stop removing water nodes that were not placed by outputs when off
+In non-finite mode, spigots and fountainheads will vanish water sources in their output positions, even if those output nodes did not place them there.
+This is annoying though not game-breaking in non-finite mode, where water sources can at least be easily replenished.
+Fixing this would require some kind of metadata marker on water nodes placed by spigots and fountains, such that only water sources placed while the device is "on" are removed when it is "off".
+It is debateable whether existing water sources should be marked for removal when the device turns on again.
+
+-- Make spigots and fountainheads deactivate by placing a flowing water node
+Currently, in non-finite mode, the spigots and fountainheads react to pressure dropping below threshold by deleting the water source they placed.
+VanessaE would like this changed so that these nodes replace the water source with a flowing water source, such that it drains away at the same rate as surrounding water.
+This should be a simple case of modifying the cleanup handler that is installed for these nodes by the helper that they use, to place flowing water instead of air in the situations where it would normally do so.
+
+--  Decorative grating functionality
+The decorative grating block currently is just that - purely decorative, it serves no purpose.
+VanessaE would like this to function as an output with the following properties:
+* While on, tries to randomly place a water source in an adjacent node every ABM interval, preferring to place it downwards first.
+* Even with multiple water source nodes placed, only drains 1 unit pressure per ABM interval in non-finite mode. Finite mode will cause it to drain 1 unit per water source node placed and simply stop placing sources when below threshold pressure, like spigots and fountainheads already do.
+* When turning off in non-finite mode, for all neighbour nodes, replace the water sources with flowing water as discussed above, but *only* if those neighbouring sources do not have any water source neighbours of their own in turn - this will prevent the block from creating a "hole" in a uniform pool of water sources.
+
+
+
+-- Support for other fluids in pipes (Feature request/wish list)
+Various sources from IRC and github issues have indicated that the ability to carry amounts of substance other than water through pipes would see uses appear for it if it were implemented (there does not appear to be anything trying to do so right now).
+Extending the pressure mechanism to handle new fluids would be simple enough, it would just have to deal with more variables.
+However, this feature raises the question of how to handle mixtures of fluids in pipes.
+
+Two possible solutions appear evident:
++ Don't mix at all. For each flowable registered, either a variant would be created for each supported liquid, or each node would declare which fluid it carries explicitly. Flowable nodes for different fluids would not interact with each other at all.
+
++ Equalise "pressure" of multiple fluid variables in a similar manner to how the single water pressure value is currently balanced out, however this raises the issue of how to deal with mixtures - for instance, how is a spigot to function with a mixed liquid? does it simply refuse to function if it doesn't know how to deal with a certain mixture (as it can only output whole nodes)? likewise for certain mixtures in pipes, should it be allowed for lava and water for instance to mix like they don't interact at all?
+
+This mechanism also hints at a weakness of the pressure logic mechanism as it currently stands - namely that liquids are handled like gases and assumed to be compressible.
+
+

vacuum_tubes.lua

@@ -87,7 +87,7 @@ local function vacuum(pos, radius)
 	for _, object in pairs(minetest.get_objects_inside_radius(pos, math.sqrt(3) * radius)) do
 		local lua_entity = object:get_luaentity()
 		if not object:is_player() and lua_entity and lua_entity.name == "__builtin:item" then
-			local obj_pos = object:getpos()
+			local obj_pos = object:get_pos()
 			local minpos = vector.subtract(pos, radius)
 			local maxpos = vector.add(pos, radius)
 			if  obj_pos.x >= minpos.x and obj_pos.x <= maxpos.x

wielder.lua

@@ -19,20 +19,44 @@ local function set_wielder_formspec(data, meta)
 	meta:set_string("infotext", data.description)
 end
 
+local can_tool_dig_node = function(nodename, toolcaps, toolname)
+	--pipeworks.logger("can_tool_dig_node() STUB nodename="..tostring(nodename).." toolname="..tostring(toolname).." toolcaps: "..dump(toolcaps))
+	-- brief documentation of minetest.get_dig_params() as it's not yet documented in lua_api.txt:
+	-- takes two arguments, a node's block groups and a tool's capabilities,
+	-- both as they appear in their respective definitions.
+	-- returns a table with the following fields:
+	-- diggable: boolean, can this tool dig this node at all
+	-- time: float, time needed to dig with this tool
+	-- wear: int, number of wear points to inflict on the item
+	local nodedef = minetest.registered_nodes[nodename]
+	-- don't explode due to nil def in event of unknown node!
+	if (nodedef == nil) then return false end
+
+	local nodegroups = nodedef.groups
+	local diggable = minetest.get_dig_params(nodegroups, toolcaps).diggable
+	if not diggable then
+		-- a pickaxe can't actually dig leaves based on it's groups alone,
+		-- but a player holding one can - the game seems to fall back to the hand.
+		-- fall back to checking the hand's properties if the tool isn't the correct one.
+		local hand_caps = minetest.registered_items[""].tool_capabilities
+		diggable = minetest.get_dig_params(nodegroups, hand_caps)
+	end
+	return diggable
+end
+
 local function wielder_on(data, wielder_pos, wielder_node)
 	data.fixup_node(wielder_pos, wielder_node)
 	if wielder_node.name ~= data.name_base.."_off" then return end
 	wielder_node.name = data.name_base.."_on"
 	minetest.swap_node(wielder_pos, wielder_node)
-	nodeupdate(wielder_pos)
+	minetest.check_for_falling(wielder_pos)
 	local wielder_meta = minetest.get_meta(wielder_pos)
 	local inv = wielder_meta:get_inventory()
 	local wield_inv_name = data.wield_inv_name
-	local wieldindex, wieldstack
+	local wieldindex
 	for i, stack in ipairs(inv:get_list(wield_inv_name)) do
 		if not stack:is_empty() then
 			wieldindex = i
-			wieldstack = stack
 			break
 		end
 	end
@@ -41,7 +65,6 @@ local function wielder_on(data, wielder_pos, wielder_node)
 		wield_inv_name = data.ghost_inv_name
 		inv:set_stack(wield_inv_name, 1, ItemStack(data.ghost_tool))
 		wieldindex = 1
-		wieldstack = inv:get_stack(wield_inv_name, 1)
 	end
 	local dir = minetest.facedir_to_dir(wielder_node.param2)
 	-- under/above is currently intentionally left switched
@@ -73,71 +96,20 @@ local function wielder_on(data, wielder_pos, wielder_node)
 		yaw = 0
 		pitch = math.pi/2
 	end
-	local virtplayer = {
-		get_inventory_formspec = delay(wielder_meta:get_string("formspec")),
-		get_look_dir = delay(vector.multiply(dir, -1)),
-		get_look_pitch = delay(pitch),
-		get_look_yaw = delay(yaw),
-		get_player_control = delay({ jump=false, right=false, left=false, LMB=false, RMB=false, sneak=data.sneak, aux1=false, down=false, up=false }),
-		get_player_control_bits = delay(data.sneak and 64 or 0),
-		get_player_name = delay(data.masquerade_as_owner and wielder_meta:get_string("owner") or ":pipeworks:"..minetest.pos_to_string(wielder_pos)),
-		is_player = delay(true),
-		is_fake_player = true,
-		set_inventory_formspec = delay(),
-		getpos = delay(vector.subtract(wielder_pos, assumed_eye_pos)),
-		get_hp = delay(20),
-		get_inventory = delay(inv),
-		get_wielded_item = delay(wieldstack),
-		get_wield_index = delay(wieldindex),
-		get_wield_list = delay(wield_inv_name),
-		moveto = delay(),
-		punch = delay(),
-		remove = delay(),
-		right_click = delay(),
-		setpos = delay(),
-		set_hp = delay(),
-		set_properties = delay(),
-		set_wielded_item = function(self, item)
-			wieldstack = item
-			inv:set_stack(wield_inv_name, wieldindex, item)
-		end,
-		set_animation = delay(),
-		set_attach = delay(),
-		set_detach = delay(),
-		set_bone_position = delay(),
-		hud_change = delay(),
-		get_breath = delay(11),
-		-- TODO "implement" all these
-		-- set_armor_groups
-		-- get_armor_groups
-		-- get_animation
-		-- get_attach
-		-- get_bone_position
-		-- get_properties
-		-- get_player_velocity
-		-- set_look_pitch
-		-- set_look_yaw
-		-- set_breath
-		-- 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
-	}
+	local virtplayer = pipeworks.create_fake_player({
+		name = data.masquerade_as_owner and wielder_meta:get_string("owner")
+			or ":pipeworks:" .. minetest.pos_to_string(wielder_pos),
+		formspec = wielder_meta:get_string("formspec"),
+		look_dir = vector.multiply(dir, -1),
+		look_pitch = pitch,
+		look_yaw = yaw,
+		sneak = data.sneak,
+		position = vector.subtract(wielder_pos, assumed_eye_pos),
+		inventory = inv,
+		wield_index = wieldindex,
+		wield_list = wield_inv_name
+	})
+
 	local pointed_thing = { type="node", under=under_pos, above=above_pos }
 	data.act(virtplayer, pointed_thing)
 	if data.eject_drops then
@@ -154,7 +126,7 @@ local function wielder_off(data, pos, node)
 	if node.name == data.name_base.."_on" then
 		node.name = data.name_base.."_off"
 		minetest.swap_node(pos, node)
-		nodeupdate(pos)
+		minetest.check_for_falling(pos)
 	end
 end
 
@@ -231,7 +203,7 @@ local function register_wielder(data)
 			end,
 			after_place_node = function (pos, placer)
 				pipeworks.scan_for_tube_objects(pos)
-				local placer_pos = placer:getpos()
+				local placer_pos = placer:get_pos()
 				if placer_pos and placer:is_player() then placer_pos = vector.add(placer_pos, assumed_eye_pos) end
 				if placer_pos then
 					local dir = vector.subtract(pos, placer_pos)
@@ -281,19 +253,22 @@ end
 
 if pipeworks.enable_node_breaker then
 	local data
+	-- see after end of data table for other use of these variables
+	local name_base = "pipeworks:nodebreaker"
+	local wield_inv_name = "pick"
 	data = {
-		name_base = "pipeworks:nodebreaker",
+		name_base = name_base,
 		description = "Node Breaker",
 		texture_base = "pipeworks_nodebreaker",
 		texture_stateful = { top = true, bottom = true, side2 = true, side1 = true, front = true },
 		tube_connect_sides = { top=1, bottom=1, left=1, right=1, back=1 },
 		tube_permit_anteroposterior_insert = false,
-		wield_inv_name = "pick",
+		wield_inv_name = wield_inv_name,
 		wield_inv_width = 1,
 		wield_inv_height = 1,
 		can_dig_nonempty_wield_inv = true,
 		ghost_inv_name = "ghost_pick",
-		ghost_tool = "default:pick_mese",
+		ghost_tool = ":",	-- hand by default
 		fixup_node = function (pos, node)
 			local meta = minetest.get_meta(pos)
 			local inv = meta:get_inventory()
@@ -346,17 +321,26 @@ if pipeworks.enable_node_breaker then
 		masquerade_as_owner = true,
 		sneak = false,
 		act = function(virtplayer, pointed_thing)
+			--local dname = "nodebreaker.act() "
 			local wieldstack = virtplayer:get_wielded_item()
 			local oldwieldstack = ItemStack(wieldstack)
 			local on_use = (minetest.registered_items[wieldstack:get_name()] or {}).on_use
 			if on_use then
+				--pipeworks.logger(dname.."invoking on_use "..tostring(on_use))
 				wieldstack = on_use(wieldstack, virtplayer, pointed_thing) or wieldstack
 				virtplayer:set_wielded_item(wieldstack)
 			else
 				local under_node = minetest.get_node(pointed_thing.under)
 				local on_dig = (minetest.registered_nodes[under_node.name] or {on_dig=minetest.node_dig}).on_dig
-				on_dig(pointed_thing.under, under_node, virtplayer)
-				wieldstack = virtplayer:get_wielded_item()
+				-- check that the current tool is capable of destroying the target node.
+				-- if we can't, don't dig, and leave the wield stack unchanged.
+				-- note that wieldstack:get_tool_capabilities() returns hand properties if the item has none of it's own.
+				if can_tool_dig_node(under_node.name, wieldstack:get_tool_capabilities(), wieldstack:get_name()) then
+					on_dig(pointed_thing.under, under_node, virtplayer)
+					wieldstack = virtplayer:get_wielded_item()
+				else
+					--pipeworks.logger(dname.."couldn't dig node!")
+				end
 			end
 			local wieldname = wieldstack:get_name()
 			if wieldname == oldwieldstack:get_name() then
@@ -379,9 +363,9 @@ if pipeworks.enable_node_breaker then
 	minetest.register_craft({
 		output = "pipeworks:nodebreaker_off",
 		recipe = {
-			{ "group:wood",    "default:pick_mese", "group:wood"    },
+			{ "pipeworks:gear", "pipeworks:gear",   "pipeworks:gear"    },
 			{ "default:stone", "mesecons:piston",   "default:stone" },
-			{ "default:stone", "mesecons:mesecon",  "default:stone" },
+			{ "group:wood",    "mesecons:mesecon",  "group:wood" },
 		}
 	})
 	-- aliases for when someone had technic installed, but then uninstalled it but not pipeworks
@@ -391,6 +375,20 @@ if pipeworks.enable_node_breaker then
 	minetest.register_alias("technic:node_breaker_on", "pipeworks:nodebreaker_on")
 	-- turn legacy auto-tree-taps into node breakers
 	dofile(pipeworks.modpath.."/legacy.lua")
+
+	-- register LBM for transition to cheaper node breakers
+	local lbm_id = "pipeworks:refund_node_breaker_pick"
+	minetest.register_lbm({
+		name = lbm_id,
+		label = "Give back mese pick for pre-transition node breakers",
+		run_at_every_load = false,
+		nodenames = { name_base.."_on", name_base.."_off" },
+		action = function(pos, node)
+			pipeworks.logger(lbm_id.." entry, nodename="..node.name)
+			local invref = minetest.get_meta(pos):get_inventory()
+			invref:add_item(wield_inv_name, ItemStack("default:pick_mese"))
+		end
+	})
 end
 
 if pipeworks.enable_deployer then
@@ -442,7 +440,9 @@ if pipeworks.enable_dispenser then
 		sneak = true,
 		act = function(virtplayer, pointed_thing)
 			local wieldstack = virtplayer:get_wielded_item()
-			virtplayer:set_wielded_item((minetest.registered_items[wieldstack:get_name()] or {on_drop=minetest.item_drop}).on_drop(wieldstack, virtplayer, virtplayer:getpos()) or wieldstack)
+			virtplayer:set_wielded_item((minetest.registered_items[wieldstack:get_name()] or
+				{on_drop=minetest.item_drop}).on_drop(wieldstack, virtplayer, virtplayer:get_pos()) or
+				wieldstack)
 		end,
 		eject_drops = false,
 	})