Change sticky movestone craft recipe

It used to be so that you could gain two sticky movestones out of one normal one,
this didn't make much sense.

README.md

@@ -53,6 +53,7 @@ These awesome people made Mesecons possible!
 
 | Contributor     | Contribution                     |
 | --------------- | -------------------------------- |
+| Hawk777         | Code for VoxelManip caching      |
 | Jat15           | Various tweaks.                  |
 | Jeija           | **Main developer! Everything.**  |
 | Jordach         | Noteblock sounds.                |

documentation.json

@@ -1,6 +1,6 @@
 {
 	"Conductors" : {
-		"Mesecon" : "mesecons/doc/mesecon",
+		"Mesecon" : "mesecons_wires/doc/mesecon",
 		"Insulated Wire" : "mesecons_insulated/doc/insulated",
 		"T-Junction" : "mesecons_extrawires/doc/tjunction",
 		"Crossing" : "mesecons_extrawires/doc/crossing",
@@ -42,6 +42,8 @@
 	},
 	"Logic" : {
 		"Luacontroller" : "mesecons_luacontroller/doc/luacontroller",
+		"FPGA" : "mesecons_fpga/doc/fpga",
+		"FPGA Programmer" : "mesecons_fpga/doc/programmer",
 		"Torch" : "mesecons_torch/doc/torch",
 		"Delayer" : "mesecons_delayer/doc/delayer",
 		"Gates" : {

mesecons/actionqueue.lua

@@ -87,8 +87,12 @@ minetest.register_globalstep(function (dtime)
 end)
 
 function mesecon.queue:execute(action)
+	-- ignore if action queue function name doesn't exist,
+	-- (e.g. in case the action queue savegame was written by an old mesecons version)
+	if mesecon.queue.funcs[action.func] then
 		mesecon.queue.funcs[action.func](action.pos, unpack(action.params))
 	end
+end
 
 
 -- Store and read the ActionQueue to / from a file

mesecons/doc/mesecon/description.html

@@ -1 +0,0 @@
- Mesecons are the wires, use them to connect effectors with receptors.

mesecons/init.lua

@@ -3,7 +3,7 @@
 -- |  \/  | |___ ____  |___ |      |    | | \  | |____
 -- |      | |        | |    |      |    | |  \ |     |
 -- |      | |___ ____| |___ |____  |____| |   \| ____|
--- by Jeija, Uberi (Temperest), sfan5, VanessaE
+-- by Jeija, Uberi (Temperest), sfan5, VanessaE, Hawk777 and contributors
 --
 --
 --
@@ -11,7 +11,7 @@
 -- See the documentation on the forum for additional information, especially about crafting
 --
 --
--- For developer documentation see the Developers' section on mesecons.TK
+-- For basic development resources, see http://mesecons.net/developers.html
 --
 --
 --
@@ -70,19 +70,11 @@ dofile(minetest.get_modpath("mesecons").."/internal.lua");
 -- these are the only functions you need to remember
 
 mesecon.queue:add_function("receptor_on", function (pos, rules)
+	mesecon.vm_begin()
+
 	rules = rules or mesecon.rules.default
 
-	-- if area (any of the rule targets) is not loaded, keep trying and call this again later
+	-- Call turnon on all linking positions
-	for _, rule in ipairs(mesecon.flattenrules(rules)) do
-		local np = vector.add(pos, rule)
-		-- if area is not loaded, keep trying
-		if minetest.get_node_or_nil(np) == nil then
-			mesecon.queue:add_action(pos, "receptor_on", {rules}, nil, rules)
-			return
-		end
-	end
-
-	-- execute action
 	for _, rule in ipairs(mesecon.flattenrules(rules)) do
 		local np = vector.add(pos, rule)
 		local rulenames = mesecon.rules_link_rule_all(pos, rule)
@@ -90,6 +82,8 @@ mesecon.queue:add_function("receptor_on", function (pos, rules)
 			mesecon.turnon(np, rulename)
 		end
 	end
+
+	mesecon.vm_commit()
 end)
 
 function mesecon.receptor_on(pos, rules)
@@ -99,23 +93,21 @@ end
 mesecon.queue:add_function("receptor_off", function (pos, rules)
 	rules = rules or mesecon.rules.default
 
-	-- if area (any of the rule targets) is not loaded, keep trying and call this again later
+	-- Call turnoff on all linking positions
-	for _, rule in ipairs(mesecon.flattenrules(rules)) do
-		local np = vector.add(pos, rule)
-		if minetest.get_node_or_nil(np) == nil then
-			mesecon.queue:add_action(pos, "receptor_off", {rules}, nil, rules)
-			return
-		end
-	end
-
 	for _, rule in ipairs(mesecon.flattenrules(rules)) do
 		local np = vector.add(pos, rule)
 		local rulenames = mesecon.rules_link_rule_all(pos, rule)
 		for _, rulename in ipairs(rulenames) do
-			if not mesecon.connected_to_receptor(np, mesecon.invertRule(rule)) then
+			mesecon.vm_begin()
-				mesecon.turnoff(np, rulename)
-			else
 			mesecon.changesignal(np, minetest.get_node(np), rulename, mesecon.state.off, 2)
+
+			-- Turnoff returns true if turnoff process was successful, no onstate receptor
+			-- was found along the way. Commit changes that were made in voxelmanip. If turnoff
+			-- returns true, an onstate receptor was found, abort voxelmanip transaction.
+			if (mesecon.turnoff(np, rulename)) then
+				mesecon.vm_commit()
+			else
+				mesecon.vm_abort()
 			end
 		end
 	end
@@ -132,8 +124,5 @@ print("[OK] Mesecons")
 -- To be removed in future releases
 dofile(minetest.get_modpath("mesecons").."/legacy.lua");
 
---The actual wires
-dofile(minetest.get_modpath("mesecons").."/wires.lua");
-
 --Services like turnoff receptor on dignode and so on
 dofile(minetest.get_modpath("mesecons").."/services.lua");

mesecons/internal.lua

@@ -37,11 +37,6 @@
 -- HIGH-LEVEL Internals
 -- mesecon.is_power_on(pos)				--> Returns true if pos emits power in any way
 -- mesecon.is_power_off(pos)				--> Returns true if pos does not emit power in any way
--- mesecon.turnon(pos, link) 				--> link is the input rule that caused calling turnon, turns on every connected node, iterative
--- mesecon.turnoff(pos, link)				--> link is the input rule that caused calling turnoff, turns off every connected node, iterative
--- mesecon.connected_to_receptor(pos, link)		--> Returns true if pos is connected to a receptor directly or via conductors, iterative
--- mesecon.rules_link(output, input, dug_outputrules)	--> Returns true if outputposition + outputrules = inputposition and inputposition + inputrules = outputposition (if the two positions connect)
--- mesecon.rules_link_anydir(outp., inp., d_outpr.)	--> Same as rules mesecon.rules_link but also returns true if output and input are swapped
 -- mesecon.is_powered(pos)				--> Returns true if pos is powered by a receptor or a conductor
 
 -- RULES ROTATION helpers
@@ -371,38 +366,32 @@ function mesecon.is_power_off(pos, rulename)
 	return false
 end
 
+-- Turn off an equipotential section starting at `pos`, which outputs in the direction of `link`.
+-- Breadth-first search. Map is abstracted away in a voxelmanip.
+-- Follow all all conductor paths replacing conductors that were already
+-- looked at, activating / changing all effectors along the way.
 function mesecon.turnon(pos, link)
 	local frontiers = {{pos = pos, link = link}}
 
 	local depth = 1
-	while frontiers[depth] do
+	while frontiers[1] do
-		local f = frontiers[depth]
+		local f = table.remove(frontiers, 1)
 		local node = mesecon.get_node_force(f.pos)
 
-		-- area not loaded, postpone action
 		if not node then
-			mesecon.queue:add_action(f.pos, "turnon", {link}, nil, true)
+			-- Area does not exist; do nothing
 		elseif mesecon.is_conductor_off(node, f.link) then
 			local rules = mesecon.conductor_get_rules(node)
 
-			minetest.swap_node(f.pos, {name = mesecon.get_conductor_on(node, f.link),
+			-- Call turnon on neighbors
-				param2 = node.param2})
-
-			-- call turnon on neighbors: normal rules
 			for _, r in ipairs(mesecon.rule2meta(f.link, rules)) do
 				local np = vector.add(f.pos, r)
-
+				for _, l in ipairs(mesecon.rules_link_rule_all(f.pos, r)) do
-				-- area not loaded, postpone action
-				if not mesecon.get_node_force(np) then
-					mesecon.queue:add_action(np, "turnon", {rulename},
-						nil, true)
-				else
-					local links = mesecon.rules_link_rule_all(f.pos, r)
-					for _, l in ipairs(links) do
 					table.insert(frontiers, {pos = np, link = l})
 				end
 			end
-			end
+
+			mesecon.swap_node_force(f.pos, mesecon.get_conductor_on(node, f.link))
 		elseif mesecon.is_effector(node.name) then
 			mesecon.changesignal(f.pos, node, f.link, mesecon.state.on, depth)
 			if mesecon.is_effector_off(node.name) then
@@ -413,137 +402,77 @@ function mesecon.turnon(pos, link)
 	end
 end
 
-mesecon.queue:add_function("turnon", function (pos, rulename, recdepth)
+-- Turn on an equipotential section starting at `pos`, which outputs in the direction of `link`.
-	mesecon.turnon(pos, rulename, recdepth)
+-- Breadth-first search. Map is abstracted away in a voxelmanip.
-end)
+-- Follow all all conductor paths replacing conductors that were already
-
+-- looked at, deactivating / changing all effectors along the way.
+-- In case an onstate receptor is discovered, abort the process by returning false, which will
+-- cause `receptor_off` to discard all changes made in the voxelmanip.
+-- Contrary to turnon, turnoff has to cache all change and deactivate signals so that they will only
+-- be called in the very end when we can be sure that no conductor was found along the path.
+--
+-- Signal table entry structure:
+-- {
+--	pos = position of effector,
+--	node = node descriptor (name, param1 and param2),
+--	link = link the effector is connected to,
+--	depth = indicates order in which signals wire fired, higher is later
+-- }
 function mesecon.turnoff(pos, link)
 	local frontiers = {{pos = pos, link = link}}
+	local signals = {}
 
 	local depth = 1
-	while frontiers[depth] do
+	while frontiers[1] do
-		local f = frontiers[depth]
+		local f = table.remove(frontiers, 1)
 		local node = mesecon.get_node_force(f.pos)
 
-		-- area not loaded, postpone action
 		if not node then
-			mesecon.queue:add_action(f.pos, "turnoff", {link}, nil, true)
+			-- Area does not exist; do nothing
 		elseif mesecon.is_conductor_on(node, f.link) then
 			local rules = mesecon.conductor_get_rules(node)
-
-			minetest.swap_node(f.pos, {name = mesecon.get_conductor_off(node, f.link),
-				param2 = node.param2})
-
-			-- call turnoff on neighbors: normal rules
 			for _, r in ipairs(mesecon.rule2meta(f.link, rules)) do
 				local np = vector.add(f.pos, r)
 
-				-- area not loaded, postpone action
+				-- Check if an onstate receptor is connected. If that is the case,
-				if not mesecon.get_node_force(np) then
+				-- abort this turnoff process by returning false. `receptor_off` will
-					mesecon.queue:add_action(np, "turnoff", {rulename},
+				-- discard all the changes that we made in the voxelmanip:
-						nil, true)
+				for _, l in ipairs(mesecon.rules_link_rule_all_inverted(f.pos, r)) do
-				else
+					if mesecon.is_receptor_on(mesecon.get_node_force(np).name) then
-					local links = mesecon.rules_link_rule_all(f.pos, r)
+						return false
-					for _, l in ipairs(links) do
+					end
+				end
+
+				-- Call turnoff on neighbors
+				for _, l in ipairs(mesecon.rules_link_rule_all(f.pos, r)) do
 					table.insert(frontiers, {pos = np, link = l})
 				end
 			end
-			end
+
+			mesecon.swap_node_force(f.pos, mesecon.get_conductor_off(node, f.link))
 		elseif mesecon.is_effector(node.name) then
-			mesecon.changesignal(f.pos, node, f.link, mesecon.state.off, depth)
+			table.insert(signals, {
-			if mesecon.is_effector_on(node.name) and not mesecon.is_powered(f.pos) then
+				pos = f.pos,
-				mesecon.deactivate(f.pos, node, f.link, depth)
+				node = node,
-			end
+				link = f.link,
+				depth = depth
+			})
 		end
 		depth = depth + 1
 	end
+
+	for _, sig in ipairs(signals) do
+		mesecon.changesignal(sig.pos, sig.node, sig.link, mesecon.state.off, sig.depth)
+		if mesecon.is_effector_on(sig.node.name) and not mesecon.is_powered(sig.pos) then
+			mesecon.deactivate(sig.pos, sig.node, sig.link, sig.depth)
+		end
 	end
 
-mesecon.queue:add_function("turnoff", function (pos, rulename, recdepth)
-	mesecon.turnoff(pos, rulename, recdepth)
-end)
-
-
-function mesecon.connected_to_receptor(pos, link)
-	local node = mesecon.get_node_force(pos)
-	if not node then return false end
-
-	-- Check if conductors around are connected
-	local rules = mesecon.get_any_inputrules(node)
-	if not rules then return false end
-
-	for _, rule in ipairs(mesecon.rule2meta(link, rules)) do
-		local links = mesecon.rules_link_rule_all_inverted(pos, rule)
-		for _, l in ipairs(links) do
-			local np = vector.add(pos, l)
-			if mesecon.find_receptor_on(np, mesecon.invertRule(l)) then
 	return true
 end
-		end
-	end
-
-	return false
-end
-
-function mesecon.find_receptor_on(pos, link)
-	local frontiers = {{pos = pos, link = link}}
-	local checked = {}
-
-	-- List of positions that have been searched for onstate receptors
-	local depth = 1
-	while frontiers[depth] do
-		local f = frontiers[depth]
-		local node = mesecon.get_node_force(f.pos)
-
-		if not node then return false end
-		if mesecon.is_receptor_on(node.name) then return true end
-		if mesecon.is_conductor_on(node, f.link) then
-			local rules = mesecon.conductor_get_rules(node)
-
-			-- call turnoff on neighbors: normal rules
-			for _, r in ipairs(mesecon.rule2meta(f.link, rules)) do
-				local np = vector.add(f.pos, r)
-
-				local links = mesecon.rules_link_rule_all_inverted(f.pos, r)
-				for _, l in ipairs(links) do
-					local checkedstring = np.x..np.y..np.z..l.x..l.y..l.z
-					if not checked[checkedstring] then
-						table.insert(frontiers, {pos = np, link = l})
-						checked[checkedstring] = true
-					end
-				end
-			end
-
-		end
-		depth = depth + 1
-	end
-end
-
-function mesecon.rules_link(output, input, dug_outputrules) --output/input are positions (outputrules optional, used if node has been dug), second return value: the name of the affected input rule
-	local outputnode = mesecon.get_node_force(output)
-	local inputnode = mesecon.get_node_force(input)
-
-	local outputrules = dug_outputrules or mesecon.get_any_outputrules (outputnode)
-	local inputrules = mesecon.get_any_inputrules (inputnode)
-	if not outputrules or not inputrules then
-		return
-	end
-
-	for _, outputrule in ipairs(mesecon.flattenrules(outputrules)) do
-		-- Check if output sends to input
-		if vector.equals(vector.add(output, outputrule), input) then
-			for _, inputrule in ipairs(mesecon.flattenrules(inputrules)) do
-				-- Check if input accepts from output
-				if  vector.equals(vector.add(input, inputrule), output) then
-					return true, inputrule
-				end
-			end
-		end
-	end
-
-	return false
-end
 
+-- Get all linking inputrules of inputnode (effector or conductor) that is connected to
+-- outputnode (receptor or conductor) at position `output` and has an output in direction `rule`
 function mesecon.rules_link_rule_all(output, rule)
 	local input = vector.add(output, rule)
 	local inputnode = mesecon.get_node_force(input)
@@ -563,8 +492,9 @@ function mesecon.rules_link_rule_all(output, rule)
 	return rules
 end
 
+-- Get all linking outputnodes of outputnode (receptor or conductor) that is connected to
+-- inputnode (effector or conductor) at position `input` and has an input in direction `rule`
 function mesecon.rules_link_rule_all_inverted(input, rule)
-	--local irule = mesecon.invertRule(rule)
 	local output = vector.add(input, rule)
 	local outputnode = mesecon.get_node_force(output)
 	local outputrules = mesecon.get_any_outputrules(outputnode)
@@ -581,10 +511,6 @@ function mesecon.rules_link_rule_all_inverted(input, rule)
 	return rules
 end
 
-function mesecon.rules_link_anydir(pos1, pos2)
-	return mesecon.rules_link(pos1, pos2) or mesecon.rules_link(pos2, pos1)
-end
-
 function mesecon.is_powered(pos, rule)
 	local node = mesecon.get_node_force(pos)
 	local rules = mesecon.get_any_inputrules(node)

mesecons/legacy.lua

@@ -1,30 +1,14 @@
--- Ugly hack to prevent breaking compatibility with other mods
+-- Un-forceload any forceloaded mapblocks from older versions of Mesecons which
--- Just remove the following two functions to delete the hack, to be done when other mods have updated
+-- used forceloading instead of VoxelManipulators.
-function mesecon.receptor_on(self, pos, rules)
+local BLOCKSIZE = 16
-	if (self.receptor_on) then
+
-		print("[Mesecons] Warning: A mod with mesecon support called mesecon:receptor_on.")
+-- convert block hash --> node position
-		print("[Mesecons]          If you are the programmer of this mod, please update it ")
+local function unhash_blockpos(hash)
-		print("[Mesecons]          to use mesecon.receptor_on instead. mesecon:* is deprecated")
+	return vector.multiply(minetest.get_position_from_hash(hash), BLOCKSIZE)
-		print("[Mesecons]          Otherwise, please make sure you're running the latest version")
-		print("[Mesecons]          of that mod and inform the mod creator.")
-	else
-		rules = pos
-		pos = self
-	end
-	mesecon.queue:add_action(pos, "receptor_on", {rules}, nil, rules)
 end
 
-function mesecon.receptor_off(self, pos, rules)
+local old_forceloaded_blocks = mesecon.file2table("mesecon_forceloaded")
-	if (self.receptor_off) then
+for hash, _ in pairs(old_forceloaded_blocks) do
-		print("[Mesecons] Warning: A mod with mesecon support called mesecon:receptor_off.")
+	minetest.forceload_free_block(unhash_blockpos(hash))
-		print("[Mesecons]          If you are the programmer of this mod, please update it ")
-		print("[Mesecons]          to use mesecon.receptor_off instead. mesecon:* is deprecated")
-		print("[Mesecons]          Otherwise, please make sure you're running the latest version")
-		print("[Mesecons]          of that mod and inform the mod creator.")
-	else
-		rules = pos
-		pos = self
 end
-	mesecon.queue:add_action(pos, "receptor_off", {rules}, nil, rules)
+os.remove(minetest.get_worldpath()..DIR_DELIM.."mesecon_forceloaded")
-end
-

mesecons/presets.lua

@@ -41,12 +41,19 @@ mesecon.rules.alldirs =
 
 mesecon.rules.buttonlike_get = function(node)
 	local rules = mesecon.rules.buttonlike
-	if node.param2 == 2 then
+	local dir = minetest.facedir_to_dir(node.param2)
+	if dir.x == 1 then
+		-- No action needed
+	elseif dir.z == -1 then
 		rules=mesecon.rotate_rules_left(rules)
-	elseif node.param2 == 3 then
+	elseif dir.x == -1 then
 		rules=mesecon.rotate_rules_right(mesecon.rotate_rules_right(rules))
-	elseif node.param2 == 0 then
+	elseif dir.z == 1 then
 		rules=mesecon.rotate_rules_right(rules)
+	elseif dir.y == -1 then
+		rules=mesecon.rotate_rules_up(rules)
+	elseif dir.y == 1 then
+		rules=mesecon.rotate_rules_down(rules)
 	end
 	return rules
 end

mesecons/services.lua

@@ -1,7 +1,7 @@
 -- Dig and place services
 
 mesecon.on_placenode = function(pos, node)
-	mesecon.update_autoconnect(pos, node)
+	mesecon.execute_autoconnect_hooks_now(pos, node)
 
 	-- Receptors: Send on signal when active
 	if mesecon.is_receptor_on(node.name) then
@@ -58,10 +58,9 @@ mesecon.on_dignode = function (pos, node)
 	elseif mesecon.is_receptor_on(node.name) then
 		mesecon.receptor_off(pos, mesecon.receptor_get_rules(node))
 	end
-	mesecon.queue:add_action(pos, "update_autoconnect", {node})
-end
 
-mesecon.queue:add_function("update_autoconnect", mesecon.update_autoconnect)
+	mesecon.execute_autoconnect_hooks_queue(pos, node)
+end
 
 minetest.register_on_placenode(mesecon.on_placenode)
 minetest.register_on_dignode(mesecon.on_dignode)

mesecons/util.lua

@@ -219,7 +219,7 @@ function mesecon.table2file(filename, table)
 	f:close()
 end
 
--- Forceloading: Force server to load area if node is nil
+-- Block position "hashing" (convert to integer) functions for voxelmanip cache
 local BLOCKSIZE = 16
 
 -- convert node position --> block hash
@@ -231,45 +231,160 @@ local function hash_blockpos(pos)
 	})
 end
 
--- convert block hash --> node position
+-- Maps from a hashed mapblock position (as returned by hash_blockpos) to a
-local function unhash_blockpos(hash)
+-- table.
-	return vector.multiply(minetest.get_position_from_hash(hash), BLOCKSIZE)
+--
+-- Contents of the table are:
+-- “vm” → the VoxelManipulator
+-- “va” → the VoxelArea
+-- “data” → the data array
+-- “param1” → the param1 array
+-- “param2” → the param2 array
+-- “dirty” → true if data has been modified
+--
+-- Nil if no VM-based transaction is in progress.
+local vm_cache = nil
+
+-- Starts a VoxelManipulator-based transaction.
+--
+-- During a VM transaction, calls to vm_get_node and vm_swap_node operate on a
+-- cached copy of the world loaded via VoxelManipulators. That cache can later
+-- be committed to the real map by means of vm_commit or discarded by means of
+-- vm_abort.
+function mesecon.vm_begin()
+	vm_cache = {}
 end
 
-mesecon.forceloaded_blocks = {}
+-- Finishes a VoxelManipulator-based transaction, freeing the VMs and map data
+-- and writing back any modified areas.
+function mesecon.vm_commit()
+	for hash, tbl in pairs(vm_cache) do
+		if tbl.dirty then
+			local vm = tbl.vm
+			vm:set_data(tbl.data)
+			vm:write_to_map()
+			vm:update_map()
+		end
+	end
+	vm_cache = nil
+end
 
--- get node and force-load area
+-- Finishes a VoxelManipulator-based transaction, freeing the VMs and throwing
-function mesecon.get_node_force(pos)
+-- away any modified areas.
+function mesecon.vm_abort()
+	vm_cache = nil
+end
+
+-- Gets the cache entry covering a position, populating it if necessary.
+local function vm_get_or_create_entry(pos)
 	local hash = hash_blockpos(pos)
-
+	local tbl = vm_cache[hash]
-	if mesecon.forceloaded_blocks[hash] == nil then
+	if not tbl then
-		-- if no more forceload spaces are available, try again next time
+		local vm = minetest.get_voxel_manip(pos, pos)
-		if minetest.forceload_block(pos) then
+		local min_pos, max_pos = vm:get_emerged_area()
-			mesecon.forceloaded_blocks[hash] = 0
+		local va = VoxelArea:new{MinEdge = min_pos, MaxEdge = max_pos}
+		tbl = {vm = vm, va = va, data = vm:get_data(), param1 = vm:get_light_data(), param2 = vm:get_param2_data(), dirty = false}
+		vm_cache[hash] = tbl
 	end
+	return tbl
+end
+
+-- Gets the node at a given position during a VoxelManipulator-based
+-- transaction.
+function mesecon.vm_get_node(pos)
+	local tbl = vm_get_or_create_entry(pos)
+	local index = tbl.va:indexp(pos)
+	local node_value = tbl.data[index]
+	if node_value == core.CONTENT_IGNORE then
+		return nil
 	else
-		mesecon.forceloaded_blocks[hash] = 0
+		local node_param1 = tbl.param1[index]
+		local node_param2 = tbl.param2[index]
+		return {name = minetest.get_name_from_content_id(node_value), param1 = node_param1, param2 = node_param2}
+	end
 end
 
-	return minetest.get_node_or_nil(pos)
+-- Sets a node’s name during a VoxelManipulator-based transaction.
+--
+-- Existing param1, param2, and metadata are left alone.
+function mesecon.vm_swap_node(pos, name)
+	local tbl = vm_get_or_create_entry(pos)
+	local index = tbl.va:indexp(pos)
+	tbl.data[index] = minetest.get_content_id(name)
+	tbl.dirty = true
 end
 
-minetest.register_globalstep(function (dtime)
+-- Gets the node at a given position, regardless of whether it is loaded or
-	for hash, time in pairs(mesecon.forceloaded_blocks) do
+-- not, respecting a transaction if one is in progress.
-		-- unload forceloaded blocks after 10 minutes without usage
+--
-		if (time > mesecon.setting("forceload_timeout", 600)) then
+-- Outside a VM transaction, if the mapblock is not loaded, it is pulled into
-			minetest.forceload_free_block(unhash_blockpos(hash))
+-- the server’s main map data cache and then accessed from there.
-			mesecon.forceloaded_blocks[hash] = nil
+--
+-- Inside a VM transaction, the transaction’s VM cache is used.
+function mesecon.get_node_force(pos)
+	if vm_cache then
+		return mesecon.vm_get_node(pos)
 	else
-			mesecon.forceloaded_blocks[hash] = time + dtime
+		local node = minetest.get_node_or_nil(pos)
+		if node == nil then
+			-- Node is not currently loaded; use a VoxelManipulator to prime
+			-- the mapblock cache and try again.
+			minetest.get_voxel_manip(pos, pos)
+			node = minetest.get_node_or_nil(pos)
+		end
+		return node
 	end
 end
-end)
 
--- Store and read the forceloaded blocks to / from a file
+-- Swaps the node at a given position, regardless of whether it is loaded or
--- so that those blocks are remembered when the game
+-- not, respecting a transaction if one is in progress.
--- is restarted
+--
-mesecon.forceloaded_blocks = mesecon.file2table("mesecon_forceloaded")
+-- Outside a VM transaction, if the mapblock is not loaded, it is pulled into
-minetest.register_on_shutdown(function()
+-- the server’s main map data cache and then accessed from there.
-	mesecon.table2file("mesecon_forceloaded", mesecon.forceloaded_blocks)
+--
-end)
+-- Inside a VM transaction, the transaction’s VM cache is used.
+--
+-- This function can only be used to change the node’s name, not its parameters
+-- or metadata.
+function mesecon.swap_node_force(pos, name)
+	if vm_cache then
+		return mesecon.vm_swap_node(pos, name)
+	else
+		-- This serves to both ensure the mapblock is loaded and also hand us
+		-- the old node table so we can preserve param2.
+		local node = mesecon.get_node_force(pos)
+		node.name = name
+		minetest.swap_node(pos, node)
+	end
+end
+
+-- Autoconnect Hooks
+-- Nodes like conductors may change their appearance and their connection rules
+-- right after being placed or after being dug, e.g. the default wires use this
+-- to automatically connect to linking nodes after placement.
+-- After placement, the update function will be executed immediately so that the
+-- possibly changed rules can be taken into account when recalculating the circuit.
+-- After digging, the update function will be queued and executed after
+-- recalculating the circuit. The update function must take care of updating the
+-- node at the given position itself, but also all of the other nodes the given
+-- position may have (had) a linking connection to.
+mesecon.autoconnect_hooks = {}
+
+-- name: A unique name for the hook, e.g. "foowire". Used to name the actionqueue function.
+-- fct: The update function with parameters function(pos, node)
+function mesecon.register_autoconnect_hook(name, fct)
+	mesecon.autoconnect_hooks[name] = fct
+	mesecon.queue:add_function("autoconnect_hook_"..name, fct)
+end
+
+function mesecon.execute_autoconnect_hooks_now(pos, node)
+	for _, fct in pairs(mesecon.autoconnect_hooks) do
+		fct(pos, node)
+	end
+end
+
+function mesecon.execute_autoconnect_hooks_queue(pos, node)
+	for name in pairs(mesecon.autoconnect_hooks) do
+		mesecon.queue:add_action(pos, "autoconnect_hook_"..name, {node})
+	end
+end

mesecons_button/init.lua

@@ -26,6 +26,7 @@ minetest.register_node("mesecons_button:button_off", {
 	paramtype2 = "facedir",
 	legacy_wallmounted = true,
 	walkable = false,
+	on_rotate = mesecon.buttonlike_onrotate,
 	sunlight_propagates = true,
 	selection_box = {
 	type = "fixed",
@@ -67,6 +68,7 @@ minetest.register_node("mesecons_button:button_on", {
 	paramtype2 = "facedir",
 	legacy_wallmounted = true,
 	walkable = false,
+	on_rotate = false,
 	light_source = default.LIGHT_MAX-7,
 	sunlight_propagates = true,
 	selection_box = {

mesecons_delayer/init.lua

@@ -47,7 +47,8 @@ elseif	i == 2 then delaytime = 0.3
 elseif	i == 3 then delaytime = 0.5
 elseif	i == 4 then delaytime = 1.0 end
 
-boxes = {{ -6/16, -8/16, -6/16, 6/16, -7/16, 6/16 },		-- the main slab
+local boxes = {
+	 { -6/16, -8/16, -6/16, 6/16, -7/16, 6/16 },		-- the main slab
 
 	 { -2/16, -7/16, -4/16, 2/16, -26/64, -3/16 },		-- the jeweled "on" indicator
 	 { -3/16, -7/16, -3/16, 3/16, -26/64, -2/16 },
@@ -57,7 +58,8 @@ boxes = {{ -6/16, -8/16, -6/16, 6/16, -7/16, 6/16 },		-- the main slab
 
 	 { -6/16, -7/16, -6/16, -4/16, -27/64, -4/16 },		-- the timer indicator
 	 { -8/16, -8/16, -1/16, -6/16, -7/16, 1/16 },		-- the two wire stubs
-	 { 6/16, -8/16, -1/16, 8/16, -7/16, 1/16 }}
+	 { 6/16, -8/16, -1/16, 8/16, -7/16, 1/16 }
+}
 
 minetest.register_node("mesecons_delayer:delayer_off_"..tostring(i), {
 	description = "Delayer",

mesecons_extrawires/corner.lua

@@ -49,7 +49,7 @@ minetest.register_node("mesecons_extrawires:corner_on", {
 
 minetest.register_node("mesecons_extrawires:corner_off", {
 	drawtype = "nodebox",
-	description = "Mesecon Corner",
+	description = "Insulated Mesecon Corner",
 	tiles = {
 		"jeija_insulated_wire_curved_tb_off.png",
 		"jeija_insulated_wire_curved_tb_off.png^[transformR270",

mesecons_extrawires/crossover.lua

@@ -1,4 +1,4 @@
-function crossover_get_rules(node)
+local function crossover_get_rules(node)
 	return {
 		{--first wire
 			{x=-1,y=0,z=0},
@@ -19,28 +19,19 @@ local crossover_states = {
 }
 
 minetest.register_node("mesecons_extrawires:crossover_off", {
-	description = "Insulated Crossover",
+	description = "Insulated Mesecon Crossover",
-	drawtype = "nodebox",
+	drawtype = "mesh",
+	mesh = "mesecons_extrawires_crossover.b3d",
 	tiles = {
-		"jeija_insulated_wire_crossing_tb_off.png",
+		"jeija_insulated_wire_ends_off.png",
-		"jeija_insulated_wire_crossing_tb_off.png",
+		"jeija_insulated_wire_sides_off.png",
+		"jeija_insulated_wire_sides_off.png",
 		"jeija_insulated_wire_ends_off.png"
 	},
 	paramtype = "light",
 	walkable = false,
 	stack_max = 99,
 	selection_box = {type="fixed", fixed={-16/32-0.0001, -18/32, -16/32-0.001, 16/32+0.001, -5/32, 16/32+0.001}},
-	node_box = {
-		type = "fixed",
-		fixed = {
-			{ -16/32-0.001, -17/32, -3/32, 16/32+0.001, -13/32, 3/32 },
-			{ -3/32, -17/32, -16/32-0.001, 3/32, -13/32, -6/32 },
-			{ -3/32, -13/32, -9/32, 3/32, -6/32, -6/32 },
-			{ -3/32, -9/32, -9/32, 3/32, -6/32, 9/32 },
-			{ -3/32, -13/32, 6/32, 3/32, -6/32, 9/32 },
-			{ -3/32, -17/32, 6/32, 3/32, -13/32, 16/32+0.001 },
-		},
-	},
 	groups = {dig_immediate=3, mesecon=3},
 	mesecons = {
 		conductor = {
@@ -53,30 +44,18 @@ minetest.register_node("mesecons_extrawires:crossover_off", {
 minetest.register_node("mesecons_extrawires:crossover_01", {
 	description = "You hacker you!",
 	drop = "mesecons_extrawires:crossover_off",
-	drawtype = "nodebox",
+	drawtype = "mesh",
+	mesh = "mesecons_extrawires_crossover.b3d",
 	tiles = {
-		"jeija_insulated_wire_crossing_tb_01.png",
+		"jeija_insulated_wire_ends_on.png",
-		"jeija_insulated_wire_crossing_tb_01.png",
+		"jeija_insulated_wire_sides_on.png",
-		"jeija_insulated_wire_ends_01x.png",
+		"jeija_insulated_wire_sides_off.png",
-		"jeija_insulated_wire_ends_01x.png",
+		"jeija_insulated_wire_ends_off.png"
-		"jeija_insulated_wire_ends_01z.png",
-		"jeija_insulated_wire_ends_01z.png"
 	},
 	paramtype = "light",
 	walkable = false,
 	stack_max = 99,
 	selection_box = {type="fixed", fixed={-16/32-0.0001, -18/32, -16/32-0.001, 16/32+0.001, -5/32, 16/32+0.001}},
-	node_box = {
-		type = "fixed",
-		fixed = {
-			{ -16/32-0.001, -17/32, -3/32, 16/32+0.001, -13/32, 3/32 },
-			{ -3/32, -17/32, -16/32-0.001, 3/32, -13/32, -6/32 },
-			{ -3/32, -13/32, -9/32, 3/32, -6/32, -6/32 },
-			{ -3/32, -9/32, -9/32, 3/32, -6/32, 9/32 },
-			{ -3/32, -13/32, 6/32, 3/32, -6/32, 9/32 },
-			{ -3/32, -17/32, 6/32, 3/32, -13/32, 16/32+0.001 },
-		},
-	},
 	groups = {dig_immediate=3, mesecon=3, not_in_creative_inventory=1},
 	mesecons = {
 		conductor = {
@@ -89,30 +68,18 @@ minetest.register_node("mesecons_extrawires:crossover_01", {
 minetest.register_node("mesecons_extrawires:crossover_10", {
 	description = "You hacker you!",
 	drop = "mesecons_extrawires:crossover_off",
-	drawtype = "nodebox",
+	drawtype = "mesh",
+	mesh = "mesecons_extrawires_crossover.b3d",
 	tiles = {
-		"jeija_insulated_wire_crossing_tb_10.png",
+		"jeija_insulated_wire_ends_off.png",
-		"jeija_insulated_wire_crossing_tb_10.png",
+		"jeija_insulated_wire_sides_off.png",
-		"jeija_insulated_wire_ends_10x.png",
+		"jeija_insulated_wire_sides_on.png",
-		"jeija_insulated_wire_ends_10x.png",
+		"jeija_insulated_wire_ends_on.png"
-		"jeija_insulated_wire_ends_10z.png",
-		"jeija_insulated_wire_ends_10z.png"
 	},
 	paramtype = "light",
 	walkable = false,
 	stack_max = 99,
 	selection_box = {type="fixed", fixed={-16/32-0.0001, -18/32, -16/32-0.001, 16/32+0.001, -5/32, 16/32+0.001}},
-	node_box = {
-		type = "fixed",
-		fixed = {
-			{ -16/32-0.001, -17/32, -3/32, 16/32+0.001, -13/32, 3/32 },
-			{ -3/32, -17/32, -16/32-0.001, 3/32, -13/32, -6/32 },
-			{ -3/32, -13/32, -9/32, 3/32, -6/32, -6/32 },
-			{ -3/32, -9/32, -9/32, 3/32, -6/32, 9/32 },
-			{ -3/32, -13/32, 6/32, 3/32, -6/32, 9/32 },
-			{ -3/32, -17/32, 6/32, 3/32, -13/32, 16/32+0.001 },
-		},
-	},
 	groups = {dig_immediate=3, mesecon=3, not_in_creative_inventory=1},
 	mesecons = {
 		conductor = {
@@ -125,30 +92,18 @@ minetest.register_node("mesecons_extrawires:crossover_10", {
 minetest.register_node("mesecons_extrawires:crossover_on", {
 	description = "You hacker you!",
 	drop = "mesecons_extrawires:crossover_off",
-	drawtype = "nodebox",
+	drawtype = "mesh",
+	mesh = "mesecons_extrawires_crossover.b3d",
 	tiles = {
-		"jeija_insulated_wire_crossing_tb_on.png",
-		"jeija_insulated_wire_crossing_tb_on.png",
-		"jeija_insulated_wire_ends_on.png",
-		"jeija_insulated_wire_ends_on.png",
 		"jeija_insulated_wire_ends_on.png",
+		"jeija_insulated_wire_sides_on.png",
+		"jeija_insulated_wire_sides_on.png",
 		"jeija_insulated_wire_ends_on.png"
 	},
 	paramtype = "light",
 	walkable = false,
 	stack_max = 99,
 	selection_box = {type="fixed", fixed={-16/32-0.0001, -18/32, -16/32-0.001, 16/32+0.001, -5/32, 16/32+0.001}},
-	node_box = {
-		type = "fixed",
-		fixed = {
-			{ -16/32-0.001, -17/32, -3/32, 16/32+0.001, -13/32, 3/32 },
-			{ -3/32, -17/32, -16/32-0.001, 3/32, -13/32, -6/32 },
-			{ -3/32, -13/32, -9/32, 3/32, -6/32, -6/32 },
-			{ -3/32, -9/32, -9/32, 3/32, -6/32, 9/32 },
-			{ -3/32, -13/32, 6/32, 3/32, -6/32, 9/32 },
-			{ -3/32, -17/32, 6/32, 3/32, -13/32, 16/32+0.001 },
-		},
-	},
 	groups = {dig_immediate=3, mesecon=3, not_in_creative_inventory=1},
 	mesecons = {
 		conductor = {

mesecons_extrawires/tjunction.lua

@@ -50,7 +50,7 @@ minetest.register_node("mesecons_extrawires:tjunction_on", {
 
 minetest.register_node("mesecons_extrawires:tjunction_off", {
 	drawtype = "nodebox",
-	description = "T-junction",
+	description = "Insulated Mesecon T-junction",
 	tiles = {
 		"jeija_insulated_wire_tjunction_tb_off.png",
 		"jeija_insulated_wire_tjunction_tb_off.png^[transformR180",

mesecons_fpga/depends.txt

@@ -0,0 +1 @@
+mesecons

mesecons_fpga/doc/fpga/description.html

@@ -0,0 +1,5 @@
+FPGAs can be used to chain multiple logic gates together in a compact manner.
+They come with 4 I/O ports and 10 internal registers,
+which can then be connected with eachother to form logic circuits.<br />
+Supported gate types: <b>AND</b>, <b>OR</b>, <b>NOT</b>, <b>XOR</b>, <b>NAND</b>, <b>XNOR</b>, <b>Buffer</b> (=)<br />
+I/O ports: <b>A B C D</b>; Registers: numbered <b>0</b> to <b>9</b>

mesecons_fpga/doc/programmer/description.html

@@ -0,0 +1,3 @@
+The FPGA programmer can be used to copy gate configurations from one FPGA to another.<br />
+Shift+Right-Click an FPGA to read its configuration and "remember" it.
+Left-click (punch) FPGAs to write the saved configuration to them.

mesecons_fpga/init.lua

@@ -0,0 +1,375 @@
+local plg = {}
+plg.rules = {}
+
+local lcore = dofile(minetest.get_modpath(minetest.get_current_modname()) .. "/logic.lua")
+dofile(minetest.get_modpath(minetest.get_current_modname()) .. "/tool.lua")(plg)
+
+
+plg.register_nodes = function(template)
+	-- each loop is for one of the 4 IO ports
+	for a = 0, 1 do
+	for b = 0, 1 do
+	for c = 0, 1 do
+	for d = 0, 1 do
+		local ndef = table.copy(template)
+		local nodename = "mesecons_fpga:fpga"
+				.. tostring(d) .. tostring(c) .. tostring(b) .. tostring(a)
+
+		-- build top texture string
+		local texture = "jeija_fpga_top.png"
+		if a == 1 then texture = texture .. "^jeija_microcontroller_LED_A.png" end
+		if b == 1 then texture = texture .. "^jeija_microcontroller_LED_B.png" end
+		if c == 1 then texture = texture .. "^jeija_microcontroller_LED_C.png" end
+		if d == 1 then texture = texture .. "^jeija_microcontroller_LED_D.png" end
+		ndef.tiles[1] = texture
+		ndef.inventory_image = texture
+
+		if (a + b + c + d) > 0 then
+			ndef.groups["not_in_creative_inventory"] = 1
+		end
+
+		-- interaction with mesecons (input / output)
+		local rules_out = {}
+		if a == 1 then table.insert(rules_out, {x = -1, y = 0, z =  0}) end
+		if b == 1 then table.insert(rules_out, {x =  0, y = 0, z =  1}) end
+		if c == 1 then table.insert(rules_out, {x =  1, y = 0, z =  0}) end
+		if d == 1 then table.insert(rules_out, {x =  0, y = 0, z = -1}) end
+		plg.rules[nodename] = rules_out
+
+		local rules_in = {}
+		if a == 0 then table.insert(rules_in, {x = -1, y = 0, z =  0}) end
+		if b == 0 then table.insert(rules_in, {x =  0, y = 0, z =  1}) end
+		if c == 0 then table.insert(rules_in, {x =  1, y = 0, z =  0}) end
+		if d == 0 then table.insert(rules_in, {x =  0, y = 0, z = -1}) end
+		ndef.mesecons.effector.rules = rules_in
+
+		if (a + b + c + d) > 0 then
+			ndef.mesecons.receptor = {
+				state = mesecon.state.on,
+				rules = rules_out,
+			}
+		end
+
+		minetest.register_node(nodename, ndef)
+	end
+	end
+	end
+	end
+end
+
+plg.register_nodes({
+	description = "FPGA",
+	drawtype = "nodebox",
+	tiles = {
+		"", -- replaced later
+		"jeija_microcontroller_bottom.png",
+		"jeija_fpga_sides.png",
+		"jeija_fpga_sides.png",
+		"jeija_fpga_sides.png",
+		"jeija_fpga_sides.png"
+	},
+	inventory_image = "", -- replaced later
+	sunlight_propagates = true,
+	paramtype = "light",
+	walkable = true,
+	groups = {dig_immediate = 2, mesecon = 3},
+	drop = "mesecons_fpga:fpga0000",
+	selection_box = {
+		type = "fixed",
+		fixed = { -8/16, -8/16, -8/16, 8/16, -5/16, 8/16 },
+	},
+	node_box = {
+		type = "fixed",
+		fixed = {
+			{ -8/16, -8/16, -8/16, 8/16, -7/16, 8/16 }, -- bottom slab
+			{ -5/16, -7/16, -5/16, 5/16, -6/16, 5/16 }, -- circuit board
+			{ -3/16, -6/16, -3/16, 3/16, -5/16, 3/16 }, -- IC
+		}
+	},
+	on_construct = function(pos)
+		local meta = minetest.get_meta(pos)
+		local is = { {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {} }
+
+		meta:set_string("instr", lcore.serialize(is))
+		meta:set_int("valid", 0)
+		meta:set_string("formspec", plg.to_formspec_string(is))
+		meta:set_string("infotext", "FPGA")
+	end,
+	on_receive_fields = function(pos, formname, fields, sender)
+		if fields.program == nil then return end -- we only care when the user clicks "Program"
+		local meta = minetest.get_meta(pos)
+		local is = plg.from_formspec_fields(fields)
+
+		meta:set_string("instr", lcore.serialize(is))
+		plg.update_formspec(pos, is)
+	end,
+	sounds = default.node_sound_stone_defaults(),
+	mesecons = {
+		effector = {
+			rules = {}, -- replaced later
+			action_change = function(pos, node, rule, newstate)
+				plg.ports_changed(pos, rule, newstate)
+				plg.update(pos)
+			end
+		}
+	},
+	after_dig_node = function(pos, node)
+		mesecon.receptor_off(pos, plg.rules[node.name])
+	end,
+})
+
+
+plg.to_formspec_string = function(is)
+	local function dropdown_op(x, y, name, val)
+		local s = "dropdown[" .. tostring(x) .. "," .. tostring(y) .. ";"
+				.. "0.75,0.5;" .. name .. ";" -- the height seems to be ignored?
+		s = s .. " ,A,B,C,D,0,1,2,3,4,5,6,7,8,9;"
+		if val == nil then
+			s = s .. "0" -- actually selects no field at all
+		elseif val.type == "io" then
+			local mapping = {
+				["A"] = 1,
+				["B"] = 2,
+				["C"] = 3,
+				["D"] = 4,
+			}
+			s = s .. tostring(1 + mapping[val.port])
+		else -- "reg"
+			s = s .. tostring(6 + val.n)
+		end
+		return s .. "]"
+	end
+	local function dropdown_action(x, y, name, val)
+		local s = "dropdown[" .. tostring(x) .. "," .. tostring(y) .. ";"
+				.. "1.125,0.5;" .. name .. ";" -- the height seems to be ignored?
+		s = s .. " , AND,  OR, NOT, XOR,NAND,   =,XNOR;"
+		if val == nil then
+			return s .. "0]" -- actually selects no field at all
+		end
+		local mapping = {
+			["and"] = 1,
+			["or"] = 2,
+			["not"] = 3,
+			["xor"] = 4,
+			["nand"] = 5,
+			["buf"] = 6,
+			["xnor"] = 7,
+		}
+		return s .. tostring(1 + mapping[val]) .. "]"
+	end
+	local s = "size[9,9]"..
+		"label[3.4,-0.15;FPGA gate configuration]"..
+		"button_exit[7,7.5;2,2.5;program;Program]"..
+		"box[4.2,0.5;0.03,7;#ffffff]"..
+		"label[0.25,0.25;op. 1]"..
+		"label[1.0,0.25;gate type]"..
+		"label[2.125,0.25;op. 2]"..
+		"label[3.15,0.25;dest]"..
+		"label[4.5,0.25;op. 1]"..
+		"label[5.25,0.25;gate type]"..
+		"label[6.375,0.25;op. 2]"..
+		"label[7.4,0.25;dest]"
+	local x = 1 - 0.75
+	local y = 1 - 0.25
+	for i = 1, 14 do
+		local cur = is[i]
+		s = s .. dropdown_op    (x      , y, tostring(i).."op1", cur.op1)
+		s = s .. dropdown_action(x+0.75 , y, tostring(i).."act", cur.action)
+		s = s .. dropdown_op    (x+1.875, y, tostring(i).."op2", cur.op2)
+		s = s .. "label[" .. tostring(x+2.625) .. "," .. tostring(y+0.1) .. "; ->]"
+		s = s .. dropdown_op    (x+2.9  , y, tostring(i).."dst", cur.dst)
+		y = y + 1
+
+		if i == 7 then
+			x = 4.5
+			y = 1 - 0.25
+		end
+	end
+	return s
+end
+
+plg.from_formspec_fields = function(fields)
+	local function read_op(s)
+		if s == nil or s == " " then
+			return nil
+		elseif s == "A" or s == "B" or s == "C" or s == "D" then
+			return {type = "io", port = s}
+		else
+			return {type = "reg", n = tonumber(s)}
+		end
+	end
+	local function read_action(s)
+		if s == nil or s == " " then
+			return nil
+		end
+		local mapping = {
+			["AND"] = "and",
+			["OR"] = "or",
+			["NOT"] = "not",
+			["XOR"] = "xor",
+			["NAND"] = "nand",
+			["="] = "buf",
+			["XNOR"] = "xnor",
+		}
+		s = s:gsub("^%s*", "") -- remove leading spaces
+		return mapping[s]
+	end
+	local is = {}
+	for i = 1, 14 do
+		local cur = {}
+		cur.op1 = read_op(fields[tonumber(i) .. "op1"])
+		cur.action = read_action(fields[tonumber(i) .. "act"])
+		cur.op2 = read_op(fields[tonumber(i) .. "op2"])
+		cur.dst = read_op(fields[tonumber(i) .. "dst"])
+		is[#is + 1] = cur
+	end
+	return is
+end
+
+plg.update_formspec = function(pos, is)
+	if type(is) == "string" then -- serialized string
+		is = lcore.deserialize(is)
+	end
+	local meta = minetest.get_meta(pos)
+	local form = plg.to_formspec_string(is)
+
+	local err = lcore.validate(is)
+	if err == nil then
+		meta:set_int("valid", 1)
+		meta:set_string("infotext", "FPGA (functional)")
+	else
+		meta:set_int("valid", 0)
+		meta:set_string("infotext", "FPGA")
+		local fmsg = minetest.colorize("#ff0000", minetest.formspec_escape(err.msg))
+		form = form .. plg.red_box_around(err.i) ..
+			"label[0.25,8.25;The gate configuration is erroneous in the marked area:]"..
+			"label[0.25,8.5;" .. fmsg .. "]"
+	end
+
+	meta:set_string("formspec", form)
+
+	-- reset ports and run programmed logic
+	plg.setports(pos, false, false, false, false)
+	plg.update(pos)
+end
+
+plg.red_box_around = function(i)
+	local x, y
+	if i > 7 then
+		x = 4.5
+		y = 0.75 + (i - 8)
+	else
+		x = 0.25
+		y = 0.75 + (i - 1)
+	end
+	return string.format("box[%f,%f;3.8,0.8;#ff0000]", x-0.1, y-0.05)
+end
+
+
+plg.update = function(pos)
+	local meta = minetest.get_meta(pos)
+	if meta:get_int("valid") ~= 1 then
+		return
+	end
+
+	local is = lcore.deserialize(meta:get_string("instr"))
+	local A, B, C, D = plg.getports(pos)
+	A, B, C, D = lcore.interpret(is, A, B, C, D)
+	plg.setports(pos, A, B, C, D)
+end
+
+plg.ports_changed = function(pos, rule, newstate)
+	if rule == nil then return end
+	local meta = minetest.get_meta(pos)
+	local states
+
+	local s = meta:get_string("portstates")
+	if s == nil then
+		states = {false, false, false, false}
+	else
+		states = {
+			s:sub(1, 1) == "1",
+			s:sub(2, 2) == "1",
+			s:sub(3, 3) == "1",
+			s:sub(4, 4) == "1",
+		}
+	end
+
+	-- trick to transform rules (see register_node) into port number
+	local portno = ({4, 1, nil, 3, 2})[3 + rule.x + 2*rule.z]
+	states[portno] = (newstate == "on")
+
+	meta:set_string("portstates",
+			(states[1] and "1" or "0") .. (states[2] and "1" or "0") ..
+			(states[3] and "1" or "0") .. (states[4] and "1" or "0")
+	)
+end
+
+plg.getports = function(pos) -- gets merged states of INPUT & OUTPUT
+	local sin, sout
+
+	local s = minetest.get_meta(pos):get_string("portstates")
+	if s == nil then
+		sin = {false, false, false, false}
+	else
+		sin = {
+			s:sub(1, 1) == "1",
+			s:sub(2, 2) == "1",
+			s:sub(3, 3) == "1",
+			s:sub(4, 4) == "1",
+		}
+	end
+
+	local name = minetest.get_node(pos).name
+	assert(name:find("mesecons_fpga:fpga") == 1)
+	local off = #"mesecons_fpga:fpga"
+	sout = {
+		name:sub(off+4, off+4) == "1",
+		name:sub(off+3, off+3) == "1",
+		name:sub(off+2, off+2) == "1",
+		name:sub(off+1, off+1) == "1",
+	}
+
+	return unpack({
+		sin[1] or sout[1],
+		sin[2] or sout[2],
+		sin[3] or sout[3],
+		sin[4] or sout[4],
+	})
+end
+
+plg.setports = function(pos, A, B, C, D) -- sets states of OUTPUT
+	local base = "mesecons_fpga:fpga"
+
+	local name = base
+			.. (D and "1" or "0") .. (C and "1" or "0")
+			.. (B and "1" or "0") .. (A and "1" or "0")
+	minetest.swap_node(pos, {name = name, param2 = minetest.get_node(pos).param2})
+
+	if A ~= nil then
+		local ru = plg.rules[base .. "0001"]
+		if A then mesecon.receptor_on(pos, ru) else mesecon.receptor_off(pos, ru) end
+	end
+	if B ~= nil then
+		local ru = plg.rules[base .. "0010"]
+		if B then mesecon.receptor_on(pos, ru) else mesecon.receptor_off(pos, ru) end
+	end
+	if C ~= nil then
+		local ru = plg.rules[base .. "0100"]
+		if C then mesecon.receptor_on(pos, ru) else mesecon.receptor_off(pos, ru) end
+	end
+	if D ~= nil then
+		local ru = plg.rules[base .. "1000"]
+		if D then mesecon.receptor_on(pos, ru) else mesecon.receptor_off(pos, ru) end
+	end
+end
+
+
+minetest.register_craft({
+	output = "mesecons_fpga:fpga0000 2",
+	recipe = {
+		{'group:mesecon_conductor_craftable', 'group:mesecon_conductor_craftable'},
+		{'mesecons_materials:silicon', 'mesecons_materials:silicon'},
+		{'group:mesecon_conductor_craftable', 'group:mesecon_conductor_craftable'},
+	}
+})

mesecons_fpga/logic.lua

@@ -0,0 +1,210 @@
+local lg = {}
+
+-- (de)serialize
+lg.serialize = function(t)
+	local function _op(t)
+		if t == nil then
+			return " "
+		elseif t.type == "io" then
+			return t.port
+		else -- t.type == "reg"
+			return tostring(t.n)
+		end
+	end
+	local function _action(s)
+		if s == nil then
+			return " "
+		end
+		local mapping = {
+			["and"] = "&",
+			["or"] = "|",
+			["not"] = "~",
+			["xor"] = "^",
+			["nand"] = "?", --dunno
+			["buf"] = "_",
+			["xnor"] = "=",
+		}
+		return mapping[s]
+	end
+
+	local s = ""
+	for i = 1, 14 do
+		local cur = t[i]
+		if next(cur) ~= nil then
+			s = s .. _op(cur.op1) .. _action(cur.action) .. _op(cur.op2) .. _op(cur.dst)
+		end
+		s = s .. "/"
+	end
+	return s
+end
+
+lg.deserialize = function(s)
+	local function _op(c)
+		if c == "A" or c == "B" or c == "C" or c == "D" then
+			return {type = "io", port = c}
+		elseif c == " " then
+			return nil
+		else
+			return {type = "reg", n = tonumber(c)}
+		end
+	end
+	local function _action(c)
+		local mapping = {
+			["&"] = "and",
+			["|"] = "or",
+			["~"] = "not",
+			["^"] = "xor",
+			["?"] = "nand",
+			["_"] = "buf",
+			["="] = "xnor",
+			[" "] = nil,
+		}
+		return mapping[c]
+	end
+
+	local ret = {}
+	for part in s:gmatch("(.-)/") do
+		local parsed
+		if part == "" then
+			parsed = {}
+		else
+			parsed = {
+				action = _action( part:sub(2,2) ),
+				op1 = _op( part:sub(1,1) ),
+				op2 = _op( part:sub(3,3) ),
+				dst = _op( part:sub(4,4) ),
+			}
+		end
+		ret[#ret + 1] = parsed
+	end
+	-- More than 14 instructions (write to all 10 regs + 4 outputs)
+	-- will not pass the write-once requirement of the validator
+	assert(#ret == 14)
+	return ret
+end
+
+-- validation
+lg.validate_single = function(t, i)
+	local function is_reg_written_to(t, n, max)
+		for i = 1, max-1 do
+			if next(t[i]) ~= nil
+					and t[i].dst and t[i].dst.type == "reg"
+					and t[i].dst.n == n then
+				return true
+			end
+		end
+		return false
+	end
+	local function compare_op(t1, t2, allow_same_io)
+		if t1 == nil or t2 == nil then
+			return false
+		elseif t1.type ~= t2.type then
+			return false
+		end
+		if t1.type == "reg" and t1.n == t2.n then
+			return true
+		elseif t1.type == "io" and t1.port == t2.port then
+			return not allow_same_io
+		end
+		return false
+	end
+	local elem = t[i]
+	-- check for completeness
+	if elem.action == nil then
+		return {i = i, msg = "Gate type required"}
+	elseif elem.action == "not" or elem.action == "buf" then
+		if elem.op1 ~= nil or elem.op2 == nil or elem.dst == nil then
+			return {i = i, msg = "Second operand (only) and destination required"}
+		end
+	else
+		if elem.op1 == nil or elem.op2 == nil or elem.dst == nil then
+			return {i = i, msg = "Operands and destination required"}
+		end
+	end
+	-- check whether operands/destination are identical
+	if compare_op(elem.op1, elem.op2) then
+		return {i = i, msg = "Operands cannot be identical"}
+	end
+	if compare_op(elem.op1, elem.dst, true) or compare_op(elem.op2, elem.dst, true) then
+		return {i = i, msg = "Destination and operands must be different"}
+	end
+	-- check whether operands point to defined registers
+	if elem.op1 ~= nil and elem.op1.type == "reg"
+			and not is_reg_written_to(t, elem.op1.n, i) then
+		return {i = i, msg = "First operand is undefined register"}
+	end
+	if elem.op2.type == "reg" and not is_reg_written_to(t, elem.op2.n, i) then
+		return {i = i, msg = "Second operand is undefined register"}
+	end
+	-- check whether destination points to undefined register
+	if elem.dst.type == "reg" and is_reg_written_to(t, elem.dst.n, i) then
+		return {i = i, msg = "Destination is already used register"}
+	end
+
+	return nil
+end
+
+lg.validate = function(t)
+	for i = 1, 14 do
+		if next(t[i]) ~= nil then
+			local r = lg.validate_single(t, i)
+			if r ~= nil then
+				return r
+			end
+		end
+	end
+	return nil
+end
+
+-- interpreter
+lg.interpret = function(t, a, b, c, d)
+	local function _action(s, v1, v2)
+		if s == "and" then
+			return v1 and v2
+		elseif s == "or" then
+			return v1 or v2
+		elseif s == "not" then
+			return not v2
+		elseif s == "xor" then
+			return v1 ~= v2
+		elseif s == "nand" then
+			return not (v1 and v2)
+		elseif s == "buf" then
+			return v2
+		else -- s == "xnor"
+			return v1 == v2
+		end
+	end
+	local function _op(t, regs, io_in)
+		if t.type == "reg" then
+			return regs[t.n]
+		else -- t.type == "io"
+			return io_in[t.port]
+		end
+	end
+
+	local io_in = {A=a, B=b, C=c, D=d}
+	local regs = {}
+	local io_out = {}
+	for i = 1, 14 do
+		local cur = t[i]
+		if next(cur) ~= nil then
+			local v1, v2
+			if cur.op1 ~= nil then
+				v1 = _op(cur.op1, regs, io_in)
+			end
+			v2 = _op(cur.op2, regs, io_in)
+
+			local result = _action(cur.action, v1, v2)
+
+			if cur.dst.type == "reg" then
+				regs[cur.dst.n] = result
+			else -- cur.dst.type == "io"
+				io_out[cur.dst.port] = result
+			end
+		end
+	end
+	return io_out.A, io_out.B, io_out.C, io_out.D
+end
+
+return lg

mesecons_fpga/tool.lua

@@ -0,0 +1,62 @@
+return function(plg)
+
+
+minetest.register_tool("mesecons_fpga:programmer", {
+	description = "FPGA Programmer",
+	inventory_image = "jeija_fpga_programmer.png",
+	stack_max = 1,
+	on_place = function(itemstack, placer, pointed_thing)
+		if pointed_thing.type ~= "node" then
+			return itemstack
+		end
+
+		local pos = pointed_thing.under
+		if minetest.get_node(pos).name:find("mesecons_fpga:fpga") ~= 1 then
+			return itemstack
+		end
+
+		local meta = minetest.get_meta(pos)
+		if meta:get_string("instr") == "//////////////" then
+			minetest.chat_send_player(placer:get_player_name(), "This FPGA is unprogrammed.")
+			return itemstack
+		end
+		itemstack:set_metadata(meta:get_string("instr"))
+		minetest.chat_send_player(placer:get_player_name(), "FPGA gate configuration was successfully copied!")
+		
+		return itemstack
+	end,
+	on_use = function(itemstack, user, pointed_thing)
+		if pointed_thing.type ~= "node" then
+			return itemstack
+		end
+
+		local pos = pointed_thing.under
+		if minetest.get_node(pos).name:find("mesecons_fpga:fpga") ~= 1 then
+			return itemstack
+		end
+
+		local imeta = itemstack:get_metadata()
+		if imeta == "" then
+			minetest.chat_send_player(user:get_player_name(), "Use shift+right-click to copy a gate configuration first.")
+			return itemstack
+		end
+
+		local meta = minetest.get_meta(pos)
+		meta:set_string("instr", imeta)
+		plg.update_formspec(pos, imeta)
+		minetest.chat_send_player(user:get_player_name(), "Gate configuration was successfully written to FPGA!")
+
+		return itemstack
+	end
+})
+
+minetest.register_craft({
+	output = "mesecons_fpga:programmer",
+	recipe = {
+		{'group:mesecon_conductor_craftable'},
+		{'mesecons_materials:silicon'},
+	}
+})
+
+
+end

mesecons_gates/init.lua

@@ -54,7 +54,7 @@ local function update_gate(pos, node, link, newstate)
 	end
 end
 
-function register_gate(name, inputnumber, assess, recipe)
+local function register_gate(name, inputnumber, assess, recipe)
 	local get_inputrules = inputnumber == 2 and gate_get_input_rules_twoinputs or
 		gate_get_input_rules_oneinput
 	local description = "Mesecons Logic Gate: "..name

mesecons_hydroturbine/init.lua

@@ -5,12 +5,12 @@
 
 minetest.register_node("mesecons_hydroturbine:hydro_turbine_off", {
 	drawtype = "mesh",
-	mesh = "jeija_hydro_turbine.obj",
+	mesh = "jeija_hydro_turbine_off.obj",
 	tiles = {
 		"jeija_hydro_turbine_sides_off.png",
 		"jeija_hydro_turbine_top_bottom.png",
-		"jeija_hydro_turbine_turbine_top_bottom.png",
+		"jeija_hydro_turbine_turbine_top_bottom_off.png",
-		"jeija_hydro_turbine_turbine_misc.png"
+		"jeija_hydro_turbine_turbine_misc_off.png"
 	},
 	inventory_image = "jeija_hydro_turbine_inv.png",
 	wield_scale = {x=0.75, y=0.75, z=0.75},
@@ -29,13 +29,15 @@ minetest.register_node("mesecons_hydroturbine:hydro_turbine_off", {
 
 minetest.register_node("mesecons_hydroturbine:hydro_turbine_on", {
 	drawtype = "mesh",
-	mesh = "jeija_hydro_turbine.obj",
+	mesh = "jeija_hydro_turbine_on.obj",
 	wield_scale = {x=0.75, y=0.75, z=0.75},
 	tiles = {
 		"jeija_hydro_turbine_sides_on.png",
 		"jeija_hydro_turbine_top_bottom.png",
-		"jeija_hydro_turbine_turbine_top_bottom.png",
+		{ name = "jeija_hydro_turbine_turbine_top_bottom_on.png",
-		"jeija_hydro_turbine_turbine_misc.png"
+		    animation = {type = "vertical_frames", aspect_w = 128, aspect_h = 16, length = 1.6} },
+		{ name = "jeija_hydro_turbine_turbine_misc_on.png",
+		    animation = {type = "vertical_frames", aspect_w = 256, aspect_h = 32, length = 0.4} }
 	},
 	inventory_image = "jeija_hydro_turbine_inv.png",
 	drop = "mesecons_hydroturbine:hydro_turbine_off 1",
@@ -53,13 +55,20 @@ minetest.register_node("mesecons_hydroturbine:hydro_turbine_on", {
 })
 
 
+local function is_flowing_water(pos)
+	local name = minetest.get_node(pos).name
+	local is_water = minetest.get_item_group(name, "water") > 0
+	local is_flowing = minetest.registered_items[name].liquidtype == "flowing"
+	return (is_water and is_flowing)
+end
+
 minetest.register_abm({
 nodenames = {"mesecons_hydroturbine:hydro_turbine_off"},
 	interval = 1,
 	chance = 1,
 	action = function(pos, node, active_object_count, active_object_count_wider)
 		local waterpos={x=pos.x, y=pos.y+1, z=pos.z}
-		if minetest.get_node(waterpos).name=="default:water_flowing" then
+		if is_flowing_water(waterpos) then
 			minetest.set_node(pos, {name="mesecons_hydroturbine:hydro_turbine_on"})
 			nodeupdate(pos)
 			mesecon.receptor_on(pos)
@@ -73,7 +82,7 @@ nodenames = {"mesecons_hydroturbine:hydro_turbine_on"},
 	chance = 1,
 	action = function(pos, node, active_object_count, active_object_count_wider)
 		local waterpos={x=pos.x, y=pos.y+1, z=pos.z}
-		if minetest.get_node(waterpos).name~="default:water_flowing" then
+		if not is_flowing_water(waterpos) then
 			minetest.set_node(pos, {name="mesecons_hydroturbine:hydro_turbine_off"})
 			nodeupdate(pos)
 			mesecon.receptor_off(pos)

mesecons_hydroturbine/models/jeija_hydro_turbine_off.obj

@@ -1,21 +1,21 @@
-# Blender v2.73 (sub 0) OBJ File: 'mesecons-water-turbine.blend'
+# Blender v2.72 (sub 0) OBJ File: 'mesecons-water-turbine.blend'
 # www.blender.org
 o Cylinder.002_Cylinder.003
-v 0.000000 0.500000 -0.150000
+v 0.000000 0.496094 -0.150000
 v 0.000000 0.562500 -0.150000
-v 0.106066 0.500000 -0.106066
+v 0.106066 0.496094 -0.106066
 v 0.106066 0.562500 -0.106066
-v 0.150000 0.500000 0.000000
+v 0.150000 0.496094 0.000000
 v 0.150000 0.562500 0.000000
-v 0.106066 0.500000 0.106066
+v 0.106066 0.496094 0.106066
 v 0.106066 0.562500 0.106066
-v -0.000000 0.500000 0.150000
+v -0.000000 0.496094 0.150000
 v -0.000000 0.562500 0.150000
-v -0.106066 0.500000 0.106066
+v -0.106066 0.496094 0.106066
 v -0.106066 0.562500 0.106066
-v -0.150000 0.500000 -0.000000
+v -0.150000 0.496094 -0.000000
 v -0.150000 0.562500 -0.000000
-v -0.106066 0.500000 -0.106066
+v -0.106066 0.496094 -0.106066
 v -0.106066 0.562500 -0.106066
 v 0.097545 0.625000 -0.490393
 v -0.097545 0.625000 -0.490393
@@ -113,38 +113,38 @@ v -0.430779 0.634645 -0.108975
 v -0.180802 0.634645 -0.292266
 v -0.180802 1.482640 -0.292266
 v -0.430779 1.482640 -0.108975
-v 0.097545 1.500000 -0.490393
+v 0.097545 1.496094 -0.490393
-v -0.097545 1.500000 -0.490393
+v -0.097545 1.496094 -0.490393
-v -0.277785 1.500000 -0.415735
+v -0.277785 1.496094 -0.415735
-v -0.415735 1.500000 -0.277785
+v -0.415735 1.496094 -0.277785
-v -0.490393 1.500000 -0.097545
+v -0.490393 1.496094 -0.097545
-v -0.490393 1.500000 0.097545
+v -0.490393 1.496094 0.097545
-v -0.415735 1.500000 0.277785
+v -0.415735 1.496094 0.277785
-v -0.277785 1.500000 0.415735
+v -0.277785 1.496094 0.415735
-v -0.097545 1.500000 0.490393
+v -0.097545 1.496094 0.490393
-v 0.097545 1.500000 0.490393
+v 0.097545 1.496094 0.490393
-v 0.277785 1.500000 0.415735
+v 0.277785 1.496094 0.415735
-v 0.415735 1.500000 0.277785
+v 0.415735 1.496094 0.277785
-v 0.490393 1.500000 0.097545
+v 0.490393 1.496094 0.097545
-v 0.490393 1.500000 -0.097545
+v 0.490393 1.496094 -0.097545
-v 0.415735 1.500000 -0.277785
+v 0.415735 1.496094 -0.277785
-v 0.277785 1.500000 -0.415735
+v 0.277785 1.496094 -0.415735
-v 0.097545 1.468750 -0.490393
+v 0.097545 1.464844 -0.490393
-v -0.097545 1.468750 -0.490393
+v -0.097545 1.464844 -0.490393
-v -0.277785 1.468750 -0.415735
+v -0.277785 1.464844 -0.415735
-v -0.415735 1.468750 -0.277785
+v -0.415735 1.464844 -0.277785
-v -0.490393 1.468750 -0.097545
+v -0.490393 1.464844 -0.097545
-v -0.490393 1.468750 0.097545
+v -0.490393 1.464844 0.097545
-v -0.415735 1.468750 0.277785
+v -0.415735 1.464844 0.277785
-v -0.277785 1.468750 0.415735
+v -0.277785 1.464844 0.415735
-v -0.097545 1.468750 0.490393
+v -0.097545 1.464844 0.490393
-v 0.097545 1.468750 0.490393
+v 0.097545 1.464844 0.490393
-v 0.277785 1.468750 0.415735
+v 0.277785 1.464844 0.415735
-v 0.415735 1.468750 0.277785
+v 0.415735 1.464844 0.277785
-v 0.490393 1.468750 0.097545
+v 0.490393 1.464844 0.097545
-v 0.490393 1.468750 -0.097545
+v 0.490393 1.464844 -0.097545
-v 0.415735 1.468750 -0.277785
+v 0.415735 1.464844 -0.277785
-v 0.277785 1.468750 -0.415735
+v 0.277785 1.464844 -0.415735
 v 0.025624 0.559630 -0.061863
 v 0.025624 1.481372 -0.061863
 v 0.061863 0.559630 -0.025624
@@ -161,14 +161,14 @@ v -0.061863 0.559630 -0.025624
 v -0.061863 1.481372 -0.025624
 v -0.025624 0.559630 -0.061863
 v -0.025624 1.481372 -0.061863
-v 0.499775 -0.499550 -0.499775
+v 0.496094 -0.496094 -0.496094
-v 0.499775 -0.499550 0.499775
+v 0.496094 -0.496094 0.496094
-v -0.499775 -0.499550 0.499775
+v -0.496094 -0.496094 0.496094
-v -0.499775 -0.499550 -0.499775
+v -0.496094 -0.496094 -0.496094
-v 0.499775 0.500000 -0.499775
+v 0.496094 0.496094 -0.496094
-v 0.499775 0.500000 0.499775
+v 0.496094 0.496094 0.496094
-v -0.499775 0.500000 0.499775
+v -0.496094 0.496094 0.496094
-v -0.499775 0.500000 -0.499775
+v -0.496094 0.496094 -0.496094
 vt 1.000000 0.000000
 vt 1.000000 1.000000
 vt 0.000000 1.000000
@@ -314,10 +314,10 @@ vt 0.031250 0.875000
 vt 0.031250 0.906250
 vt 0.062500 0.906250
 vn 1.000000 0.000000 0.000000
-vn -0.000000 -0.000000 1.000000
+vn 0.000000 0.000000 1.000000
-vn -1.000000 -0.000000 -0.000000
+vn -1.000000 0.000000 0.000000
 vn 0.000000 0.000000 -1.000000
-vn 0.000000 -1.000000 -0.000000
+vn 0.000000 -1.000000 0.000000
 vn 0.000000 1.000000 0.000000
 vn 0.382700 0.000000 -0.923900
 vn 0.923900 0.000000 -0.382700

mesecons_insulated/init.lua

@@ -1,4 +1,4 @@
-function insulated_wire_get_rules(node)
+local function insulated_wire_get_rules(node)
 	local rules = 	{{x = 1,  y = 0,  z = 0},
 			 {x =-1,  y = 0,  z = 0}}
 	if node.param2 == 1 or node.param2 == 3 then

mesecons_lamp/init.lua

@@ -2,7 +2,7 @@
 -- A lamp is "is an electrical device used to create artificial light" (wikipedia)
 -- guess what?
 
-mesecon_lamp_box = {
+local mesecon_lamp_box = {
 	type = "wallmounted",
 	wall_top = {-0.3125,0.375,-0.3125,0.3125,0.5,0.3125},
 	wall_bottom = {-0.3125,-0.5,-0.3125,0.3125,-0.375,0.3125},

mesecons_luacontroller/init.lua

@@ -20,8 +20,6 @@
 -- The Sandbox
 -- The whole code of the controller runs in a sandbox,
 -- a very restricted environment.
--- However, as this does not prevent you from using e.g. loops,
--- we need to check for these prohibited commands first.
 -- 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
@@ -275,9 +273,25 @@ 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()
 			digiline:receptor_send(pos, digiline.rules.default, channel, msg)
 		end)
+		return true
 	end
 end
 
@@ -286,6 +300,7 @@ 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

mesecons_microcontroller/init.lua

@@ -1,6 +1,7 @@
-EEPROM_SIZE = 255
+local EEPROM_SIZE = 255
 
 local microc_rules = {}
+local yc = {}
 
 for a = 0, 1 do
 for b = 0, 1 do
@@ -20,6 +21,7 @@ end
 if tostring(d) == "1" then
 	top = top.."^jeija_microcontroller_LED_D.png"
 end
+local groups
 if tostring(d)..tostring(c)..tostring(b)..tostring(a) ~= "0000" then
 	groups = {dig_immediate=2, not_in_creative_inventory=1, mesecon = 3, overheat = 1}
 else
@@ -42,8 +44,8 @@ local mesecons = {effector =
 {
 	rules = input_rules,
 	action_change = function (pos, node, rulename, newstate)
-		yc_update_real_portstates(pos, node, rulename, newstate)
+		yc.update_real_portstates(pos, node, rulename, newstate)
-		update_yc(pos)
+		yc.update(pos)
 	end
 }}
 if nodename ~= "mesecons_microcontroller:microcontroller0000" then
@@ -127,8 +129,8 @@ minetest.register_node(nodename, {
 		"button[7.5,0.2;1.5,3;brsflop;RS-Flop]"..
 		"button_exit[3.5,1;2,3;program;Program]")
 		meta:set_string("infotext", "Programmed Microcontroller")
-		yc_reset (pos)
+		yc.reset (pos)
-		update_yc(pos)
+		yc.update(pos)
 	end,
 	sounds = default.node_sound_stone_defaults(),
 	mesecons = mesecons,
@@ -151,8 +153,8 @@ minetest.register_craft({
 	}
 })
 
-function yc_reset(pos)
+yc.reset = function(pos)
-	yc_action(pos, {a=false, b=false, c=false, d=false})
+	yc.action(pos, {a=false, b=false, c=false, d=false})
 	local meta = minetest.get_meta(pos)
 	meta:set_int("afterid", 0)
 	local r = ""
@@ -160,7 +162,7 @@ function yc_reset(pos)
 	meta:set_string("eeprom", r)
 end
 
-function update_yc(pos)
+yc.update = function(pos)
 	local meta = minetest.get_meta(pos)
 
 	if (mesecon.do_overheat(pos)) then
@@ -172,10 +174,10 @@ function update_yc(pos)
 	end
 
 	local code = meta:get_string("code")
-	code = yc_code_remove_commentary(code)
+	code = yc.code_remove_commentary(code)
 	code = string.gsub(code, " ", "")	--Remove all spaces
 	code = string.gsub(code, "	", "")	--Remove all tabs
-	if yc_parsecode(code, pos) == nil then
+	if yc.parsecode(code, pos) == nil then
 		meta:set_string("infotext", "Code not valid!\n"..code)
 	else
 		meta:set_string("infotext", "Working Microcontroller\n"..code)
@@ -184,7 +186,7 @@ end
 
 
 --Code Parsing
-function yc_code_remove_commentary(code)
+yc.code_remove_commentary = function(code)
 	local is_string = false
 	for i = 1, #code do
 		if code:sub(i, i) == '"' then
@@ -196,50 +198,50 @@ function yc_code_remove_commentary(code)
 	return code
 end
 
-function yc_parsecode(code, pos)
+yc.parsecode = function(code, pos)
 	local meta = minetest.get_meta(pos)
 	local endi = 1
-	local Lreal = yc_get_real_portstates(pos)
+	local Lreal = yc.get_real_portstates(pos)
-	local Lvirtual = yc_get_virtual_portstates(pos)
+	local Lvirtual = yc.get_virtual_portstates(pos)
 	if Lvirtual == nil then return nil end
 	local c
 	local eeprom = meta:get_string("eeprom")
 	while true do
 		local command, params
-		command, endi = parse_get_command(code, endi)
+		command, endi = yc.parse_get_command(code, endi)
 		if command == nil then return nil end
 		if command == true then break end --end of code
 		if command == "if" then
 			local r
-			r, endi = yc_command_if(code, endi, yc_merge_portstates(Lreal, Lvirtual), eeprom)
+			r, endi = yc.command_if(code, endi, yc.merge_portstates(Lreal, Lvirtual), eeprom)
 			if r == nil then return nil end
 			if r == true then  -- nothing
 			elseif r == false then
-				local endi_new = yc_skip_to_else (code, endi)
+				local endi_new = yc.skip_to_else (code, endi)
 				if endi_new == nil then --else > not found
-					endi = yc_skip_to_endif(code, endi)
+					endi = yc.skip_to_endif(code, endi)
 				else
 					endi = endi_new
 				end
 				if endi == nil then return nil end
 			end
 		else
-			params, endi = parse_get_params(code, endi)
+			params, endi = yc.parse_get_params(code, endi)
 			if not params then return nil end
 		end
 		if command == "on" then
-			L = yc_command_on (params, Lvirtual)
+			L = yc.command_on (params, Lvirtual)
 		elseif command == "off" then
-			L = yc_command_off(params, Lvirtual)
+			L = yc.command_off(params, Lvirtual)
 		elseif command == "print" then
-			local su = yc_command_print(params, eeprom, yc_merge_portstates(Lreal, Lvirtual))
+			local su = yc.command_print(params, eeprom, yc.merge_portstates(Lreal, Lvirtual))
 			if su ~= true then return nil end
 		elseif command == "after" then
-			local su = yc_command_after(params, pos)
+			local su = yc.command_after(params, pos)
 			if su == nil then return nil end
 		elseif command == "sbi" then
 			local new_eeprom
-			new_eeprom, Lvirtual = yc_command_sbi (params, eeprom, yc_merge_portstates(Lreal, Lvirtual), Lvirtual)
+			new_eeprom, Lvirtual = yc.command_sbi (params, eeprom, yc.merge_portstates(Lreal, Lvirtual), Lvirtual)
 			if new_eeprom == nil then return nil
 			else eeprom = new_eeprom end
 		elseif command == "if" then --nothing
@@ -250,11 +252,11 @@ function yc_parsecode(code, pos)
 		if eeprom == nil then return nil else
 		minetest.get_meta(pos):set_string("eeprom", eeprom) end
 	end
-	yc_action(pos, Lvirtual)
+	yc.action(pos, Lvirtual)
 	return true
 end
 
-function parse_get_command(code, starti)
+yc.parse_get_command = function(code, starti)
 	i = starti
 	local s
 	while s ~= "" do
@@ -266,7 +268,7 @@ function parse_get_command(code, starti)
 			starti = starti + 1
 			i = starti
 		elseif s == ">" then
-			starti = yc_skip_to_endif(code, starti)
+			starti = yc.skip_to_endif(code, starti)
 			if starti == nil then return nil end
 			i = starti
 		else
@@ -280,7 +282,7 @@ function parse_get_command(code, starti)
 	return nil, nil
 end
 
-function parse_get_params(code, starti)
+yc.parse_get_params = function(code, starti)
 	i = starti
 	local s
 	local params = {}
@@ -303,7 +305,7 @@ function parse_get_params(code, starti)
 	return nil, nil
 end
 
-function yc_parse_get_eeprom_param(cond, starti)
+yc.parse_get_eeprom_param = function(cond, starti)
 	i = starti
 	local s
 	local addr
@@ -319,7 +321,7 @@ function yc_parse_get_eeprom_param(cond, starti)
 	return nil, nil
 end
 
-function yc_skip_to_endif(code, starti)
+yc.skip_to_endif = function(code, starti)
 	local i = starti
 	local s = false
 	local open_ifs = 1
@@ -339,7 +341,7 @@ function yc_skip_to_endif(code, starti)
 	return nil
 end
 
-function yc_skip_to_else(code, starti)
+yc.skip_to_else = function(code, starti)
 	local i = starti
 	local s = false
 	local open_ifs = 1
@@ -360,29 +362,29 @@ function yc_skip_to_else(code, starti)
 end
 
 --Commands
-function yc_command_on(params, L)
+yc.command_on = function(params, L)
 	local rules = {}
 	for i, port in ipairs(params) do
-		L = yc_set_portstate (port, true, L)
+		L = yc.set_portstate (port, true, L)
 	end
 	return L
 end
 
-function yc_command_off(params, L)
+yc.command_off = function(params, L)
 	local rules = {}
 	for i, port in ipairs(params) do
-		L = yc_set_portstate (port, false, L)
+		L = yc.set_portstate (port, false, L)
 	end
 	return L
 end
 
-function yc_command_print(params, eeprom, L)
+yc.command_print = function(params, eeprom, L)
 	local s = ""
 	for i, param in ipairs(params) do
 		if param:sub(1,1) == '"' and param:sub(#param, #param) == '"' then
 			s = s..param:sub(2, #param-1)
 		else
-			r = yc_command_parsecondition(param, L, eeprom)
+			r = yc.command_parsecondition(param, L, eeprom)
 			if r == "1" or r == "0" then
 				s = s..r
 			else return nil end
@@ -392,17 +394,17 @@ function yc_command_print(params, eeprom, L)
 	return true
 end
 
-function yc_command_sbi(params, eeprom, L, Lv)
+yc.command_sbi = function(params, eeprom, L, Lv)
 	if params[1]==nil or params[2]==nil or params[3] ~=nil then return nil end
-	local status = yc_command_parsecondition(params[2], L, eeprom)
+	local status = yc.command_parsecondition(params[2], L, eeprom)
 
 	if status == nil then return nil, nil end
 
 	if string.find("ABCD", params[1])~=nil and #params[1]==1 then --is a port
 		if status == "1" then
-			Lv = yc_set_portstate (params[1], true,  Lv)
+			Lv = yc.set_portstate (params[1], true,  Lv)
 		else
-			Lv = yc_set_portstate (params[1], false, Lv)
+			Lv = yc.set_portstate (params[1], false, Lv)
 		end
 		return eeprom, Lv;
 	end
@@ -420,7 +422,7 @@ function yc_command_sbi(params, eeprom, L, Lv)
 end
 
 -- after (delay)
-function yc_command_after(params, pos)
+yc.command_after = function(params, pos)
 	if params[1] == nil or params[2] == nil or params[3] ~= nil then return nil end
 
 	--get time (maximum time is 200)
@@ -436,14 +438,14 @@ function yc_command_after(params, pos)
 	local afterid = math.random(10000)
 	local meta = minetest.get_meta(pos)
 	meta:set_int("afterid", afterid)
-	minetest.after(time, yc_command_after_execute, {pos = pos, code = code, afterid = afterid})
+	minetest.after(time, yc.command_after_execute, {pos = pos, code = code, afterid = afterid})
 	return true
 end
 
-function yc_command_after_execute(params)
+yc.command_after_execute = function(params)
 	local meta = minetest.get_meta(params.pos)
 	if meta:get_int("afterid") == params.afterid then --make sure the node has not been changed
-		if yc_parsecode(params.code, params.pos) == nil then
+		if yc.parsecode(params.code, params.pos) == nil then
 			meta:set_string("infotext", "Code in after() not valid!")
 		else
 			if code ~= nil then
@@ -456,21 +458,21 @@ function yc_command_after_execute(params)
 end
 
 --If
-function yc_command_if(code, starti, L, eeprom)
+yc.command_if = function(code, starti, L, eeprom)
-	local cond, endi = yc_command_if_getcondition(code, starti)
+	local cond, endi = yc.command_if_getcondition(code, starti)
 	if cond == nil then return nil end
 
-	cond = yc_command_parsecondition(cond, L, eeprom)
+	cond = yc.command_parsecondition(cond, L, eeprom)
 
 	local result
 	if cond == "0" then result = false
 	elseif cond == "1" then result = true end
 	if not result then end
-	return result, endi --endi from local cond, endi = yc_command_if_getcondition(code, starti)
+	return result, endi --endi from local cond, endi = yc.command_if_getcondition(code, starti)
 end
 
 --Condition parsing
-function yc_command_if_getcondition(code, starti)
+yc.command_if_getcondition = function(code, starti)
 	i = starti
 	local s
 	local brackets = 1 --1 Bracket to close
@@ -494,7 +496,7 @@ function yc_command_if_getcondition(code, starti)
 	return nil, nil
 end
 
-function yc_command_parsecondition(cond, L, eeprom)
+yc.command_parsecondition = function(cond, L, eeprom)
 	cond = string.gsub(cond, "A", tonumber(L.a and 1 or 0))
 	cond = string.gsub(cond, "B", tonumber(L.b and 1 or 0))
 	cond = string.gsub(cond, "C", tonumber(L.c and 1 or 0))
@@ -506,8 +508,8 @@ function yc_command_parsecondition(cond, L, eeprom)
 	while i<=l do
 		local s = cond:sub(i,i)
 		if s == "#" then
-			local addr, endi = yc_parse_get_eeprom_param(cond, i+1)
+			local addr, endi = yc.parse_get_eeprom_param(cond, i+1)
-			local buf = yc_eeprom_read(tonumber(addr), eeprom)
+			local buf = yc.eeprom_read(tonumber(addr), eeprom)
 			if buf == nil then return nil end
 			local call = cond:sub(i, endi-1)
 			cond = string.gsub(cond, call, buf)
@@ -580,14 +582,14 @@ function yc_command_parsecondition(cond, L, eeprom)
 end
 
 --Virtual-Hardware functions
-function yc_eeprom_read(number, eeprom)
+yc.eeprom_read = function(number, eeprom)
 	if not number then return end
 	return eeprom:sub(number, number)
 end
 
 --Real I/O functions
-function yc_action(pos, L) --L-->Lvirtual
+yc.action = function(pos, L) --L-->Lvirtual
-	local Lv = yc_get_virtual_portstates(pos)
+	local Lv = yc.get_virtual_portstates(pos)
 	local name = "mesecons_microcontroller:microcontroller"
 		..tonumber(L.d and 1 or 0)
 		..tonumber(L.c and 1 or 0)
@@ -596,10 +598,10 @@ function yc_action(pos, L) --L-->Lvirtual
 	local node = minetest.get_node(pos)
 	minetest.swap_node(pos, {name = name, param2 = node.param2})
 
-	yc_action_setports(pos, L, Lv)
+	yc.action_setports(pos, L, Lv)
 end
 
-function yc_action_setports(pos, L, Lv)
+yc.action_setports = function(pos, L, Lv)
 	local name = "mesecons_microcontroller:microcontroller"
 	local rules
 	if Lv.a ~= L.a then
@@ -624,7 +626,7 @@ function yc_action_setports(pos, L, Lv)
 	end
 end
 
-function yc_set_portstate(port, state, L)
+yc.set_portstate = function(port, state, L)
 	if port == "A" then L.a = state
 	elseif port == "B" then L.b = state
 	elseif port == "C" then L.c = state
@@ -633,7 +635,7 @@ function yc_set_portstate(port, state, L)
 	return L
 end
 
-function yc_update_real_portstates(pos, node, rulename, newstate)
+yc.update_real_portstates = function(pos, node, rulename, newstate)
 	local meta = minetest.get_meta(pos)
 	if rulename == nil then
 		meta:set_int("real_portstates", 1)
@@ -657,7 +659,7 @@ function yc_update_real_portstates(pos, node, rulename, newstate)
 	meta:set_int("real_portstates", 1 + L[1] + 2*L[2] + 4*L[3] + 8*L[4])
 end
 
-function yc_get_real_portstates(pos) -- determine if ports are powered (by itself or from outside)
+yc.get_real_portstates = function(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
@@ -668,7 +670,7 @@ function yc_get_real_portstates(pos) -- determine if ports are powered (by itsel
 	return L
 end
 
-function yc_get_virtual_portstates(pos) -- portstates according to the name
+yc.get_virtual_portstates = function(pos) -- portstates according to the name
 	local name = minetest.get_node(pos).name
 	local b, a = string.find(name, ":microcontroller")
 	if a == nil then return nil end
@@ -682,7 +684,7 @@ function yc_get_virtual_portstates(pos) -- portstates according to the name
 	return Lvirtual
 end
 
-function yc_merge_portstates(Lreal, Lvirtual)
+yc.merge_portstates = function(Lreal, Lvirtual)
 	local L = {a=false, b=false, c=false, d=false}
 	if Lvirtual.a or Lreal.a then L.a = true end
 	if Lvirtual.b or Lreal.b then L.b = true end

mesecons_movestones/init.lua

@@ -26,28 +26,28 @@ function mesecon.get_movestone_direction(pos)
 
 	lpos = {x=pos.x+1, y=pos.y, z=pos.z}
 	for n = 1, 3 do
-		if mesecon.is_power_on(lpos, rules[n].x, rules[n].y, rules[n].z) then
+		if mesecon.is_power_on(lpos, rules[n]) then
 			return {x=0, y=0, z=-1}
 		end
 	end
 
 	lpos = {x = pos.x-1, y = pos.y, z = pos.z}
 	for n=4, 6 do
-		if mesecon.is_power_on(lpos, rules[n].x, rules[n].y, rules[n].z) then
+		if mesecon.is_power_on(lpos, rules[n]) then
 			return {x=0, y=0, z=1}
 		end
 	end
 
 	lpos = {x = pos.x, y = pos.y, z = pos.z+1}
 	for n=7, 9 do
-		if mesecon.is_power_on(lpos, rules[n].x, rules[n].y, rules[n].z) then
+		if mesecon.is_power_on(lpos, rules[n]) then
 			return {x=-1, y=0, z=0}
 		end
 	end
 
 	lpos = {x = pos.x, y = pos.y, z = pos.z-1}
 	for n=10, 12 do
-		if mesecon.is_power_on(lpos, rules[n].x, rules[n].y, rules[n].z) then
+		if mesecon.is_power_on(lpos, rules[n]) then
 			return {x=1, y=0, z=0}
 		end
 	end
@@ -145,7 +145,7 @@ mesecon.register_movestone("mesecons_movestones:sticky_movestone", {
 }, true)
 
 minetest.register_craft({
-	output = "mesecons_movestones:sticky_movestone 2",
+	output = "mesecons_movestones:sticky_movestone",
 	recipe = {
 		{"mesecons_materials:glue", "mesecons_movestones:movestone", "mesecons_materials:glue"},
 	}

mesecons_mvps/init.lua

@@ -200,7 +200,6 @@ end
 mesecon.register_on_mvps_move(function(moved_nodes)
 	for _, n in ipairs(moved_nodes) do
 		mesecon.on_placenode(n.pos, n.node)
-		mesecon.update_autoconnect(n.pos)
 	end
 end)
 

mesecons_pistons/init.lua

@@ -1,6 +1,6 @@
 -- Get mesecon rules of pistons
-piston_rules =
+local piston_rules = {
-{{x=0,  y=0,  z=1}, --everything apart from z- (pusher side)
+ {x=0,  y=0,  z=1}, --everything apart from z- (pusher side)
  {x=1,  y=0,  z=0},
  {x=-1, y=0,  z=0},
  {x=1,  y=1,  z=0},
@@ -8,29 +8,32 @@ piston_rules =
  {x=-1, y=1,  z=0},
  {x=-1, y=-1, z=0},
  {x=0,  y=1,  z=1},
- {x=0,  y=-1, z=1}}
+ {x=0,  y=-1, z=1}
+}
 
-local piston_up_rules =
+local piston_up_rules = {
-{{x=0,  y=0,  z=-1}, --everything apart from y+ (pusher side)
+ {x=0,  y=0,  z=-1}, --everything apart from y+ (pusher side)
  {x=1,  y=0,  z=0},
  {x=-1, y=0,  z=0},
  {x=0,  y=0,  z=1},
  {x=1,  y=-1, z=0},
  {x=-1, y=-1, z=0},
  {x=0,  y=-1, z=1},
- {x=0,  y=-1, z=-1}}
+ {x=0,  y=-1, z=-1}
+}
 
-local piston_down_rules =
+local piston_down_rules = {
-{{x=0,  y=0,  z=-1}, --everything apart from y- (pusher side)
+ {x=0,  y=0,  z=-1}, --everything apart from y- (pusher side)
  {x=1,  y=0,  z=0},
  {x=-1, y=0,  z=0},
  {x=0,  y=0,  z=1},
  {x=1,  y=1, z=0},
  {x=-1, y=1, z=0},
  {x=0,  y=1, z=1},
- {x=0,  y=1, z=-1}}
+ {x=0,  y=1, z=-1}
+}
 
-local piston_get_rules = function (node)
+local function piston_get_rules(node)
 	local rules = piston_rules
 	for i = 1, node.param2 do
 		rules = mesecon.rotate_rules_left(rules)
@@ -38,7 +41,7 @@ local piston_get_rules = function (node)
 	return rules
 end
 
-piston_facedir_direction = function (node)
+local function piston_facedir_direction(node)
 	local rules = {{x = 0, y = 0, z = -1}}
 	for i = 1, node.param2 do
 		rules = mesecon.rotate_rules_left(rules)
@@ -46,7 +49,7 @@ piston_facedir_direction = function (node)
 	return rules[1]
 end
 
-piston_get_direction = function(dir, node)
+local function piston_get_direction(dir, node)
 	if type(dir) == "function" then
 		return dir(node)
 	else

mesecons_pressureplates/init.lua

@@ -8,7 +8,7 @@ local pp_box_on = {
 	fixed = { -7/16, -8/16, -7/16, 7/16, -7.5/16, 7/16 },
 }
 
-pp_on_timer = function (pos, elapsed)
+local function pp_on_timer(pos, elapsed)
 	local node = minetest.get_node(pos)
 	local basename = minetest.registered_nodes[node.name].pressureplate_basename
 

mesecons_random/init.lua

@@ -9,7 +9,7 @@ minetest.register_node("mesecons_random:removestone", {
 	mesecons = {effector = {
 		action_on = function (pos, node)
 			minetest.remove_node(pos)
-			mesecon.update_autoconnect(pos)
+			mesecon.on_dignode(pos, node)
 		end
 	}}
 })
@@ -53,6 +53,7 @@ minetest.register_node("mesecons_random:ghoststone_active", {
 	diggable = false,
 	sunlight_propagates = true,
 	paramtype = "light",
+	drop = "mesecons_random:ghoststone",
 	mesecons = {conductor = {
 		state = mesecon.state.on,
 		rules = {

mesecons_receiver/init.lua

@@ -1,10 +1,30 @@
-rcvboxes = {
+local rcvboxes = {
 	{ -3/16, -3/16, -8/16       , 3/16,  3/16  , -13/32       }, -- the smaller bump
 	{ -1/32, -1/32, -3/2        , 1/32,  1/32  , -1/2         }, -- the wire through the block
 	{ -2/32, -1/2 , -.5         , 2/32,  0     , -.5002+3/32  }, -- the vertical wire bit
 	{ -2/32, -1/2 , -7/16+0.002 , 2/32,  -14/32,  16/32+0.001 }  -- the horizontal wire
 }
 
+local down_rcvboxes = {
+	{-6/16, -8/16, -6/16, 6/16, -7/16, 6/16}, -- Top plate
+	{-2/16, -6/16, -2/16, 2/16, -7/16, 2/16}, -- Bump
+	{-1/16, -8/16, -1/16, 1/16, -24/16, 1/16}, -- Wire through the block
+	{-1/16, -8/16, 6/16,  1/16, -7/16, 8/16}, -- Plate extension (North)
+	{-1/16, -8/16, -6/16, 1/16, -7/16, -8/16}, -- Plate extension (South)
+	{-8/16, -8/16, 1/16, -6/16, -7/16, -1/16}, -- Plate extension (West)
+	{6/16,  -8/16, 1/16,  8/16, -7/16, -1/16}, -- Plate extension (East)
+}
+
+local up_rcvboxes = {
+	{-6/16, -8/16, -6/16, 6/16, -7/16, 6/16}, -- Top plate
+	{-2/16, -6/16, -2/16, 2/16, -7/16, 2/16}, -- Bump
+	{-1/16, -6/16, -1/16, 1/16, 24/16, 1/16}, -- Wire through the block
+	{-1/16, -8/16, 6/16,  1/16, -7/16, 8/16}, -- Plate extension (North)
+	{-1/16, -8/16, -6/16, 1/16, -7/16, -8/16}, -- Plate extension (South)
+	{-8/16, -8/16, 1/16, -6/16, -7/16, -1/16}, -- Plate extension (West)
+	{6/16,  -8/16, 1/16,  8/16, -7/16, -1/16}, -- Plate extension (East)
+}
+
 local receiver_get_rules = function (node)
 	local rules = {	{x =  1, y = 0, z = 0},
 			{x = -2, y = 0, z = 0}}
@@ -18,20 +38,13 @@ local receiver_get_rules = function (node)
 	return rules
 end
 
-minetest.register_node("mesecons_receiver:receiver_on", {
+mesecon.register_node("mesecons_receiver:receiver", {
 	drawtype = "nodebox",
-	tiles = {
-		"receiver_top_on.png",
-		"receiver_bottom_on.png",
-		"receiver_lr_on.png",
-		"receiver_lr_on.png",
-		"receiver_fb_on.png",
-		"receiver_fb_on.png",
-	},
 	paramtype = "light",
 	paramtype2 = "facedir",
 	sunlight_propagates = true,
 	walkable = false,
+	on_rotate = false,
 	selection_box = {
              	type = "fixed",
 		fixed = { -3/16, -8/16, -8/16, 3/16, 3/16, 8/16 }
@@ -42,16 +55,7 @@ minetest.register_node("mesecons_receiver:receiver_on", {
 	},
 	groups = {dig_immediate = 3, not_in_creative_inventory = 1},
 	drop = "mesecons:wire_00000000_off",
-	mesecons = {conductor = {
+}, {
-		state = mesecon.state.on,
-		rules = receiver_get_rules,
-		offstate = "mesecons_receiver:receiver_off"
-	}}
-})
-
-minetest.register_node("mesecons_receiver:receiver_off", {
-	drawtype = "nodebox",
-	description = "You hacker you",
 	tiles = {
 		"receiver_top_off.png",
 		"receiver_bottom_off.png",
@@ -60,57 +64,148 @@ minetest.register_node("mesecons_receiver:receiver_off", {
 		"receiver_fb_off.png",
 		"receiver_fb_off.png",
 	},
-	paramtype = "light",
-	paramtype2 = "facedir",
-	sunlight_propagates = true,
-	walkable = false,
-	selection_box = {
-             	type = "fixed",
-		fixed = { -3/16, -8/16, -8/16, 3/16, 3/16, 8/16 }
-	},
-	node_box = {
-		type = "fixed",
-		fixed = rcvboxes
-	},
-	groups = {dig_immediate = 3, not_in_creative_inventory = 1},
-	drop = "mesecons:wire_00000000_off",
 	mesecons = {conductor = {
 		state = mesecon.state.off,
 		rules = receiver_get_rules,
 		onstate = "mesecons_receiver:receiver_on"
 	}}
+}, {
+	tiles = {
+		"receiver_top_on.png",
+		"receiver_bottom_on.png",
+		"receiver_lr_on.png",
+		"receiver_lr_on.png",
+		"receiver_fb_on.png",
+		"receiver_fb_on.png",
+	},
+	mesecons = {conductor = {
+		state = mesecon.state.on,
+		rules = receiver_get_rules,
+		offstate = "mesecons_receiver:receiver_off"
+	}}
+})
+
+mesecon.register_node("mesecons_receiver:receiver_up", {
+	drawtype = "nodebox",
+	paramtype = "light",
+	paramtype2 = "facedir",
+	sunlight_propagates = true,
+	walkable = false,
+	on_rotate = false,
+	selection_box = {
+             	type = "fixed",
+		fixed = up_rcvboxes
+	},
+	node_box = {
+		type = "fixed",
+		fixed = up_rcvboxes
+	},
+	groups = {dig_immediate = 3, not_in_creative_inventory = 1},
+	drop = "mesecons:wire_00000000_off",
+}, {
+	tiles = {"mesecons_wire_off.png"},
+	mesecons = {conductor = {
+		state = mesecon.state.off,
+		rules = {{x=1, y=0, z=0},
+			{x=-1, y=0, z=0},
+			{x=0,  y=0, z=1},
+			{x=0,  y=0, z=-1},
+			{x=0,  y=1, z=0},
+			{x=0,  y=2, z=0}},
+		onstate = "mesecons_receiver:receiver_up_on"
+	}}
+}, {
+	tiles = {"mesecons_wire_on.png"},
+	mesecons = {conductor = {
+		state = mesecon.state.on,
+		rules = {{x=1, y=0, z=0},
+			{x=-1, y=0, z=0},
+			{x=0,  y=0, z=1},
+			{x=0,  y=0, z=-1},
+			{x=0,  y=1, z=0},
+			{x=0,  y=2, z=0}},
+		offstate = "mesecons_receiver:receiver_up_off"
+	}}
+})
+
+mesecon.register_node("mesecons_receiver:receiver_down", {
+	drawtype = "nodebox",
+	paramtype = "light",
+	paramtype2 = "facedir",
+	sunlight_propagates = true,
+	walkable = false,
+	on_rotate = false,
+	selection_box = {
+             	type = "fixed",
+		fixed = down_rcvboxes
+	},
+	node_box = {
+		type = "fixed",
+		fixed = down_rcvboxes
+	},
+	groups = {dig_immediate = 3, not_in_creative_inventory = 1},
+	drop = "mesecons:wire_00000000_off",
+}, {
+	tiles = {"mesecons_wire_off.png"},
+	mesecons = {conductor = {
+		state = mesecon.state.off,
+		rules = {{x=1,y=0, z=0},
+			{x=-1,y=0, z=0},
+			{x=0, y=0, z=1},
+			{x=0, y=0, z=-1},
+			{x=0, y=-2,z=0}},
+		onstate = "mesecons_receiver:receiver_down_on"
+	}}
+}, {
+	tiles = {"mesecons_wire_on.png"},
+	mesecons = {conductor = {
+		state = mesecon.state.on,
+		rules = {{x=1,y=0, z=0},
+			{x=-1,y=0, z=0},
+			{x=0, y=0, z=1},
+			{x=0, y=0, z=-1},
+			{x=0, y=-2,z=0}},
+		offstate = "mesecons_receiver:receiver_down_off"
+	}}
 })
 
 function mesecon.receiver_get_pos_from_rcpt(pos, param2)
 	local rules = {{x = 2,  y = 0, z = 0}}
 	if param2 == nil then param2 = minetest.get_node(pos).param2 end
-	if param2 == 2 then
+	local rcvtype = "mesecons_receiver:receiver_off"
+	local dir = minetest.facedir_to_dir(param2)
+
+	if dir.x == 1 then
+		-- No action needed
+	elseif dir.z == -1 then
 		rules = mesecon.rotate_rules_left(rules)
-	elseif param2 == 3 then
+	elseif dir.x == -1 then
 		rules = mesecon.rotate_rules_right(mesecon.rotate_rules_right(rules))
-	elseif param2 == 0 then
+	elseif dir.z == 1 then
 		rules = mesecon.rotate_rules_right(rules)
+	elseif dir.y == -1 then
+		rules = mesecon.rotate_rules_up(rules)
+		rcvtype = "mesecons_receiver:receiver_up_off"
+	elseif dir.y == 1 then
+		rules = mesecon.rotate_rules_down(rules)
+		rcvtype = "mesecons_receiver:receiver_down_off"
 	end
 	local np = {	x = pos.x + rules[1].x,
 			y = pos.y + rules[1].y,
 			z = pos.z + rules[1].z}
-	return np
+	return np, rcvtype
 end
 
 function mesecon.receiver_place(rcpt_pos)
 	local node = minetest.get_node(rcpt_pos)
-	local pos = mesecon.receiver_get_pos_from_rcpt(rcpt_pos, node.param2)
+	local pos, rcvtype = mesecon.receiver_get_pos_from_rcpt(rcpt_pos, node.param2)
 	local nn = minetest.get_node(pos)
+	local param2 = minetest.dir_to_facedir(minetest.facedir_to_dir(node.param2))
 
 	if string.find(nn.name, "mesecons:wire_") ~= nil then
 		minetest.dig_node(pos)
-		if mesecon.is_power_on(rcpt_pos) then
+		minetest.set_node(pos, {name = rcvtype, param2 = param2})
-			minetest.set_node(pos, {name = "mesecons_receiver:receiver_on", param2 = node.param2})
+		mesecon.on_placenode(pos, nn)
-			mesecon.receptor_on(pos, receiver_get_rules(node))
-		else
-			minetest.set_node(pos, {name = "mesecons_receiver:receiver_off", param2 = node.param2})
-		end
-		mesecon.update_autoconnect(pos)
 	end
 end
 
@@ -121,7 +216,6 @@ function mesecon.receiver_remove(rcpt_pos, dugnode)
 		minetest.dig_node(pos)
 		local node = {name = "mesecons:wire_00000000_off"}
 		minetest.set_node(pos, node)
-		mesecon.update_autoconnect(pos)
 		mesecon.on_placenode(pos, node)
 	end
 end
@@ -143,7 +237,9 @@ minetest.register_on_placenode(function (pos, node)
 		local rules = {	{x = 2,  y = 0,  z = 0},
 				{x =-2,  y = 0,  z = 0},
 				{x = 0,  y = 0,  z = 2},
-				{x = 0,  y = 0, z =-2}}
+				{x = 0,  y = 0,  z =-2},
+				{x = 0,  y = 2,  z = 0},
+				{x = 0,  y = -2, z = 0}}
 		local i = 1
 		while rules[i] ~= nil do
 			local np = {	x = pos.x + rules[i].x,
@@ -156,3 +252,8 @@ minetest.register_on_placenode(function (pos, node)
 		end
 	end
 end)
+
+function mesecon.buttonlike_onrotate(pos, node)
+	minetest.after(0, mesecon.receiver_remove, pos, node)
+	minetest.after(0, mesecon.receiver_place, pos)
+end

mesecons_walllever/init.lua

@@ -31,6 +31,7 @@ mesecon.register_node("mesecons_walllever:wall_lever", {
 		"jeija_wall_lever_back_edges.png"
 	},
 	mesh="jeija_wall_lever_off.obj",
+	on_rotate = mesecon.buttonlike_onrotate,
 	mesecons = {receptor = {
 		rules = mesecon.rules.buttonlike_get,
 		state = mesecon.state.off
@@ -44,6 +45,7 @@ mesecon.register_node("mesecons_walllever:wall_lever", {
 		"jeija_wall_lever_back_edges.png"
 	},
 	mesh="jeija_wall_lever_on.obj",
+	on_rotate = false,
 	mesecons = {receptor = {
 		rules = mesecon.rules.buttonlike_get,
 		state = mesecon.state.on

mesecons_wires/depends.txt

@@ -0,0 +1 @@
+mesecons

mesecons_wires/doc/mesecon/description.html

@@ -0,0 +1 @@
+Mesecons are the wires, use them to connect effectors with receptors.

mesecons_wires/init.lua

@@ -91,10 +91,7 @@ local update_on_place_dig = function (pos, node)
 	end
 end
 
-function mesecon.update_autoconnect(pos, node)
+mesecon.register_autoconnect_hook("wire", update_on_place_dig)
-	if (not node) then node = minetest.get_node(pos) end
-	update_on_place_dig(pos, node)
-end
 
 -- ############################
 -- ## Wire node registration ##
@@ -143,7 +140,7 @@ nid_inc = function (nid)
 	return i <= 8
 end
 
-register_wires = function()
+local function register_wires()
 	local nid = {}
 	while true do
 		-- Create group specifiction and nodeid string (see note above for details)
@@ -204,7 +201,7 @@ register_wires = function()
 			groups_off["not_in_creative_inventory"] = 1
 		end
 
-		mesecon.register_node("mesecons:wire_"..nodeid, {
+		mesecon.register_node(":mesecons:wire_"..nodeid, {
 			description = "Mesecon",
 			drawtype = "nodebox",
 			inventory_image = "mesecons_wire_inv.png",