[mesecons] Update

- Update of Mesecons

mods/mesecons/README.md

@@ -22,7 +22,7 @@ OK, I want in.
 --------------
 Go get it!
 
-[DOWNLOADS PAGE](http://mesecons.net/downloads.php)
+[DOWNLOAD IT NOW](https://github.com/Jeija/minetest-mod-mesecons/archive/master.zip)
 
 Now go ahead and install it like any other Minetest mod. Don't know how? Check out [the wonderful page about it](http://wiki.minetest.com/wiki/Mods) over at the Minetest Wiki. For your convenience, here's a quick summary:
 
@@ -39,7 +39,7 @@ How do I use this thing?
 ------------------------
 How about a [quick overview video](https://www.youtube.com/watch?v=6kmeQj6iW5k)?
 
-Or maybe a [comprehensive reference](http://mesecons.net/items.php) is your style?
+Or maybe a [comprehensive reference](http://mesecons.net/items.html) is your style?
 
 An overview for the very newest of new beginners? How does [this one](http://uberi.mesecons.net/projects/MeseconsBasics/index.html) look?
 

mods/mesecons/mesecons/VERSION

@@ -1 +0,0 @@
-0.41 DEV

mods/mesecons/mesecons/actionqueue.lua

@@ -23,7 +23,7 @@ function mesecon.queue:add_action(pos, func, params, time, overwritecheck, prior
 	-- Otherwise, add the action to the queue
 	if overwritecheck then -- check if old action has to be overwritten / removed:
 		for i, ac in ipairs(mesecon.queue.actions) do
-			if(mesecon.cmpPos(pos, ac.pos)
+			if(vector.equals(pos, ac.pos)
 			and mesecon.cmpAny(overwritecheck, ac.owcheck)) then
 				toremove = i
 				break
@@ -94,25 +94,8 @@ end
 -- Store and read the ActionQueue to / from a file
 -- so that upcoming actions are remembered when the game
 -- is restarted
-
+mesecon.queue.actions = mesecon.file2table("mesecon_actionqueue")
-local wpath = minetest.get_worldpath()
-local function file2table(filename)
-	local f = io.open(filename, "r")
-	if f==nil then return {} end
-	local t = f:read("*all")
-	f:close()
-	if t=="" or t==nil then return {} end
-	return minetest.deserialize(t)
-end
-
-local function table2file(filename, table)
-	local f = io.open(filename, "w")
-	f:write(minetest.serialize(table))
-	f:close()
-end
-
-mesecon.queue.actions = file2table(wpath.."/mesecon_actionqueue")
 
 minetest.register_on_shutdown(function()
-	mesecon.queue.actions = table2file(wpath.."/mesecon_actionqueue", mesecon.queue.actions)
+	mesecon.table2file("mesecon_actionqueue", mesecon.queue.actions)
 end)

mods/mesecons/mesecons/init.lua

@@ -74,7 +74,7 @@ mesecon.queue:add_function("receptor_on", function (pos, rules)
 
 	-- if area (any of the rule targets) is not loaded, keep trying and call this again later
 	for _, rule in ipairs(mesecon.flattenrules(rules)) do
-		local np = mesecon.addPosRule(pos, rule)
+		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)
@@ -84,7 +84,7 @@ mesecon.queue:add_function("receptor_on", function (pos, rules)
 
 	-- execute action
 	for _, rule in ipairs(mesecon.flattenrules(rules)) do
-		local np = mesecon.addPosRule(pos, rule)
+		local np = vector.add(pos, rule)
 		local rulenames = mesecon.rules_link_rule_all(pos, rule)
 		for _, rulename in ipairs(rulenames) do
 			mesecon.turnon(np, rulename)
@@ -101,7 +101,7 @@ mesecon.queue:add_function("receptor_off", function (pos, rules)
 
 	-- if area (any of the rule targets) is not loaded, keep trying and call this again later
 	for _, rule in ipairs(mesecon.flattenrules(rules)) do
-		local np = mesecon.addPosRule(pos, rule)
+		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
@@ -109,7 +109,7 @@ mesecon.queue:add_function("receptor_off", function (pos, rules)
 	end
 
 	for _, rule in ipairs(mesecon.flattenrules(rules)) do
-		local np = mesecon.addPosRule(pos, rule)
+		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

mods/mesecons/mesecons/internal.lua

@@ -77,6 +77,8 @@ function mesecon.get_conductor(nodename)
 end
 
 function mesecon.get_any_outputrules (node)
+	if not node then return nil end
+
 	if mesecon.is_conductor(node.name) then
 		return mesecon.conductor_get_rules(node)
 	elseif mesecon.is_receptor(node.name) then
@@ -85,6 +87,8 @@ function mesecon.get_any_outputrules (node)
 end
 
 function mesecon.get_any_inputrules (node)
+	if not node then return nil end
+
 	if mesecon.is_conductor(node.name) then
 		return mesecon.conductor_get_rules(node)
 	elseif mesecon.is_effector(node.name) then
@@ -182,7 +186,9 @@ end
 
 -- Activation:
 mesecon.queue:add_function("activate", function (pos, rulename)
-	local node = minetest.get_node(pos)
+	local node = mesecon.get_node_force(pos)
+	if not node then return end
+
 	local effector = mesecon.get_effector(node.name)
 
 	if effector and effector.action_on then
@@ -203,7 +209,9 @@ end
 
 -- Deactivation
 mesecon.queue:add_function("deactivate", function (pos, rulename)
-	local node = minetest.get_node(pos)
+	local node = mesecon.get_node_force(pos)
+	if not node then return end
+
 	local effector = mesecon.get_effector(node.name)
 
 	if effector and effector.action_off then
@@ -224,7 +232,9 @@ end
 
 -- Change
 mesecon.queue:add_function("change", function (pos, rulename, changetype)
-	local node = minetest.get_node(pos)
+	local node = mesecon.get_node_force(pos)
+	if not node then return end
+
 	local effector = mesecon.get_effector(node.name)
 
 	if effector and effector.action_change then
@@ -249,6 +259,8 @@ end
 -- Conductors
 
 function mesecon.is_conductor_on(node, rulename)
+	if not node then return false end
+
 	local conductor = mesecon.get_conductor(node.name)
 	if conductor then
 		if conductor.state then
@@ -263,10 +275,13 @@ function mesecon.is_conductor_on(node, rulename)
 			return mesecon.get_bit(binstate, bit)
 		end
 	end
+
 	return false
 end
 
 function mesecon.is_conductor_off(node, rulename)
+	if not node then return false end
+
 	local conductor = mesecon.get_conductor(node.name)
 	if conductor then
 		if conductor.state then
@@ -281,6 +296,7 @@ function mesecon.is_conductor_off(node, rulename)
 			return not mesecon.get_bit(binstate, bit)
 		end
 	end
+
 	return false
 end
 
@@ -340,16 +356,16 @@ end
 -- some more general high-level stuff
 
 function mesecon.is_power_on(pos, rulename)
-	local node = minetest.get_node(pos)
+	local node = mesecon.get_node_force(pos)
-	if mesecon.is_conductor_on(node, rulename) or mesecon.is_receptor_on(node.name) then
+	if node and (mesecon.is_conductor_on(node, rulename) or mesecon.is_receptor_on(node.name)) then
 		return true
 	end
 	return false
 end
 
 function mesecon.is_power_off(pos, rulename)
-	local node = minetest.get_node(pos)
+	local node = mesecon.get_node_force(pos)
-	if mesecon.is_conductor_off(node, rulename) or mesecon.is_receptor_off(node.name) then
+	if node and (mesecon.is_conductor_off(node, rulename) or mesecon.is_receptor_off(node.name)) then
 		return true
 	end
 	return false
@@ -361,7 +377,7 @@ function mesecon.turnon(pos, link)
 	local depth = 1
 	while frontiers[depth] do
 		local f = frontiers[depth]
-		local node = minetest.get_node_or_nil(f.pos)
+		local node = mesecon.get_node_force(f.pos)
 
 		-- area not loaded, postpone action
 		if not node then
@@ -374,10 +390,10 @@ function mesecon.turnon(pos, link)
 
 			-- call turnon on neighbors: normal rules
 			for _, r in ipairs(mesecon.rule2meta(f.link, rules)) do
-				local np = mesecon.addPosRule(f.pos, r)
+				local np = vector.add(f.pos, r)
 
 				-- area not loaded, postpone action
-				if not minetest.get_node_or_nil(np) then
+				if not mesecon.get_node_force(np) then
 					mesecon.queue:add_action(np, "turnon", {rulename},
 						nil, true)
 				else
@@ -407,7 +423,7 @@ function mesecon.turnoff(pos, link)
 	local depth = 1
 	while frontiers[depth] do
 		local f = frontiers[depth]
-		local node = minetest.get_node_or_nil(f.pos)
+		local node = mesecon.get_node_force(f.pos)
 
 		-- area not loaded, postpone action
 		if not node then
@@ -420,10 +436,10 @@ function mesecon.turnoff(pos, link)
 
 			-- call turnoff on neighbors: normal rules
 			for _, r in ipairs(mesecon.rule2meta(f.link, rules)) do
-				local np = mesecon.addPosRule(f.pos, r)
+				local np = vector.add(f.pos, r)
 
 				-- area not loaded, postpone action
-				if not minetest.get_node_or_nil(np) then
+				if not mesecon.get_node_force(np) then
 					mesecon.queue:add_action(np, "turnoff", {rulename},
 						nil, true)
 				else
@@ -449,7 +465,8 @@ end)
 
 
 function mesecon.connected_to_receptor(pos, link)
-	local node = minetest.get_node(pos)
+	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)
@@ -458,7 +475,7 @@ function mesecon.connected_to_receptor(pos, link)
 	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 = mesecon.addPosRule(pos, l)
+			local np = vector.add(pos, l)
 			if mesecon.find_receptor_on(np, mesecon.invertRule(l)) then
 				return true
 			end
@@ -476,7 +493,7 @@ function mesecon.find_receptor_on(pos, link)
 	local depth = 1
 	while frontiers[depth] do
 		local f = frontiers[depth]
-		local node = minetest.get_node_or_nil(f.pos)
+		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
@@ -485,7 +502,7 @@ function mesecon.find_receptor_on(pos, link)
 
 			-- call turnoff on neighbors: normal rules
 			for _, r in ipairs(mesecon.rule2meta(f.link, rules)) do
-				local np = mesecon.addPosRule(f.pos, r)
+				local np = vector.add(f.pos, r)
 
 				local links = mesecon.rules_link_rule_all_inverted(f.pos, r)
 				for _, l in ipairs(links) do
@@ -503,8 +520,9 @@ function mesecon.find_receptor_on(pos, link)
 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 = minetest.get_node(output)
+	local outputnode = mesecon.get_node_force(output)
-	local inputnode = minetest.get_node(input)
+	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
@@ -513,21 +531,22 @@ function mesecon.rules_link(output, input, dug_outputrules) --output/input are p
 
 	for _, outputrule in ipairs(mesecon.flattenrules(outputrules)) do
 		-- Check if output sends to input
-		if mesecon.cmpPos(mesecon.addPosRule(output, outputrule), input) then
+		if vector.equals(vector.add(output, outputrule), input) then
 			for _, inputrule in ipairs(mesecon.flattenrules(inputrules)) do
 				-- Check if input accepts from output
-				if  mesecon.cmpPos(mesecon.addPosRule(input, inputrule), output) then
+				if  vector.equals(vector.add(input, inputrule), output) then
 					return true, inputrule
 				end
 			end
 		end
 	end
+
 	return false
 end
 
 function mesecon.rules_link_rule_all(output, rule)
-	local input = mesecon.addPosRule(output, rule)
+	local input = vector.add(output, rule)
-	local inputnode = minetest.get_node(input)
+	local inputnode = mesecon.get_node_force(input)
 	local inputrules = mesecon.get_any_inputrules (inputnode)
 	if not inputrules then
 		return {}
@@ -536,17 +555,18 @@ function mesecon.rules_link_rule_all(output, rule)
 
 	for _, inputrule in ipairs(mesecon.flattenrules(inputrules)) do
 		-- Check if input accepts from output
-		if  mesecon.cmpPos(mesecon.addPosRule(input, inputrule), output) then
+		if  vector.equals(vector.add(input, inputrule), output) then
 			table.insert(rules, inputrule)
 		end
 	end
+
 	return rules
 end
 
 function mesecon.rules_link_rule_all_inverted(input, rule)
 	--local irule = mesecon.invertRule(rule)
-	local output = mesecon.addPosRule(input, rule)
+	local output = vector.add(input, rule)
-	local outputnode = minetest.get_node(output)
+	local outputnode = mesecon.get_node_force(output)
 	local outputrules = mesecon.get_any_outputrules (outputnode)
 	if not outputrules then
 		return {}
@@ -554,7 +574,7 @@ function mesecon.rules_link_rule_all_inverted(input, rule)
 	local rules = {}
 
 	for _, outputrule in ipairs(mesecon.flattenrules(outputrules)) do
-		if  mesecon.cmpPos(mesecon.addPosRule(output, outputrule), input) then
+		if  vector.equals(vector.add(output, outputrule), input) then
 			table.insert(rules, mesecon.invertRule(outputrule))
 		end
 	end
@@ -566,7 +586,7 @@ function mesecon.rules_link_anydir(pos1, pos2)
 end
 
 function mesecon.is_powered(pos, rule)
-	local node = minetest.get_node(pos)
+	local node = mesecon.get_node_force(pos)
 	local rules = mesecon.get_any_inputrules(node)
 	if not rules then return false end
 
@@ -577,10 +597,11 @@ function mesecon.is_powered(pos, rule)
 		for _, rule in ipairs(mesecon.flattenrules(rules)) do
 			local rulenames = mesecon.rules_link_rule_all_inverted(pos, rule)
 			for _, rname in ipairs(rulenames) do
-				local np = mesecon.addPosRule(pos, rname)
+				local np = vector.add(pos, rname)
-				local nn = minetest.get_node(np)
+				local nn = mesecon.get_node_force(np)
-				if (mesecon.is_conductor_on (nn, mesecon.invertRule(rname))
+
-				or mesecon.is_receptor_on (nn.name)) then
+				if (mesecon.is_conductor_on(nn, mesecon.invertRule(rname))
+				or mesecon.is_receptor_on(nn.name)) then
 					table.insert(sourcepos, np)
 				end
 			end
@@ -588,8 +609,8 @@ function mesecon.is_powered(pos, rule)
 	else
 		local rulenames = mesecon.rules_link_rule_all_inverted(pos, rule)
 		for _, rname in ipairs(rulenames) do
-			local np = mesecon.addPosRule(pos, rname)
+			local np = vector.add(pos, rname)
-			local nn = minetest.get_node(np)
+			local nn = mesecon.get_node_force(np)
 			if (mesecon.is_conductor_on (nn, mesecon.invertRule(rname))
 			or mesecon.is_receptor_on (nn.name)) then
 				table.insert(sourcepos, np)

mods/mesecons/mesecons/services.lua

@@ -16,7 +16,7 @@ mesecon.on_placenode = function (pos, node)
 			-- also call receptor_on if itself is powered already, so that neighboring
 			-- conductors will be activated (when pushing an on-conductor with a piston)
 			for _, s in ipairs(sources) do
-				local rule = {x = pos.x - s.x, y = pos.y - s.y, z = pos.z - s.z}
+				local rule = vector.subtract(pos, s)
 				mesecon.turnon(pos, rule)
 			end
 			--mesecon.receptor_on (pos, mesecon.conductor_get_rules(node))

mods/mesecons/mesecons/util.lua

@@ -2,7 +2,7 @@ function mesecon.move_node(pos, newpos)
 	local node = minetest.get_node(pos)
 	local meta = minetest.get_meta(pos):to_table()
 	minetest.remove_node(pos)
-	minetest.add_node(newpos, node)
+	minetest.set_node(newpos, node)
 	minetest.get_meta(pos):from_table(meta)
 end
 
@@ -50,7 +50,7 @@ function mesecon.rule2bit(findrule, allrules)
 	end
 	for m,metarule in ipairs( allrules) do
 	for _,    rule in ipairs(metarule ) do
-		if mesecon.cmpPos(findrule, rule) then
+		if vector.equals(findrule, rule) then
 			return m
 		end
 	end
@@ -69,7 +69,7 @@ function mesecon.rule2metaindex(findrule, allrules)
 
 	for m, metarule in ipairs( allrules) do
 	for _,     rule in ipairs(metarule ) do
-		if mesecon.cmpPos(findrule, rule) then
+		if vector.equals(findrule, rule) then
 			return m
 		end
 	end
@@ -133,15 +133,7 @@ function mesecon.set_bit(binary,bit,value)
 end
 
 function mesecon.invertRule(r)
-	return {x = -r.x, y = -r.y, z = -r.z}
+	return vector.multiply(r, -1)
-end
-
-function mesecon.addPosRule(p, r)
-	return {x = p.x + r.x, y = p.y + r.y, z = p.z + r.z}
-end
-
-function mesecon.cmpPos(p1, p2)
-	return (p1.x == p2.x and p1.y == p2.y and p1.z == p2.z)
 end
 
 function mesecon.tablecopy(table) -- deep table copy
@@ -209,3 +201,75 @@ function mesecon.flipstate(pos, node)
 
 	return newstate
 end
+
+-- File writing / reading utilities
+local wpath = minetest.get_worldpath()
+function mesecon.file2table(filename)
+	local f = io.open(wpath..DIR_DELIM..filename, "r")
+	if f == nil then return {} end
+	local t = f:read("*all")
+	f:close()
+	if t == "" or t == nil then return {} end
+	return minetest.deserialize(t)
+end
+
+function mesecon.table2file(filename, table)
+	local f = io.open(wpath..DIR_DELIM..filename, "w")
+	f:write(minetest.serialize(table))
+	f:close()
+end
+
+-- Forceloading: Force server to load area if node is nil
+local BLOCKSIZE = 16
+
+-- convert node position --> block hash
+local function hash_blockpos(pos)
+	return minetest.hash_node_position({
+		x = math.floor(pos.x/BLOCKSIZE),
+		y = math.floor(pos.y/BLOCKSIZE),
+		z = math.floor(pos.z/BLOCKSIZE)
+	})
+end
+
+-- convert block hash --> node position
+local function unhash_blockpos(hash)
+	return vector.multiply(minetest.get_position_from_hash(hash), BLOCKSIZE)
+end
+
+mesecon.forceloaded_blocks = {}
+
+-- get node and force-load area
+function mesecon.get_node_force(pos)
+	local hash = hash_blockpos(pos)
+
+	if mesecon.forceloaded_blocks[hash] == nil then
+		-- if no more forceload spaces are available, try again next time
+		if minetest.forceload_block(pos) then
+			mesecon.forceloaded_blocks[hash] = 0
+		end
+	else
+		mesecon.forceloaded_blocks[hash] = 0
+	end
+
+	return minetest.get_node_or_nil(pos)
+end
+
+minetest.register_globalstep(function (dtime)
+	for hash, time in pairs(mesecon.forceloaded_blocks) do
+		-- unload forceloaded blocks after 10 minutes without usage
+		if (time > mesecon.setting("forceload_timeout", 600)) then
+			minetest.forceload_free_block(unhash_blockpos(hash))
+			mesecon.forceloaded_blocks[hash] = nil
+		else
+			mesecon.forceloaded_blocks[hash] = time + dtime
+		end
+	end
+end)
+
+-- Store and read the forceloaded blocks to / from a file
+-- so that those blocks are remembered when the game
+-- is restarted
+mesecon.forceloaded_blocks = mesecon.file2table("mesecon_forceloaded")
+minetest.register_on_shutdown(function()
+	mesecon.table2file("mesecon_forceloaded", mesecon.forceloaded_blocks)
+end)

mods/mesecons/mesecons/wires.lua

@@ -22,7 +22,7 @@ local wire_getconnect = function (from_pos, self_pos)
 		end
 
 		for _, r in ipairs(mesecon.flattenrules(rules)) do
-			if (mesecon.cmpPos(mesecon.addPosRule(self_pos, r), from_pos)) then
+			if (vector.equals(vector.add(self_pos, r), from_pos)) then
 				return true
 			end
 		end
@@ -35,7 +35,7 @@ local wire_updateconnect = function (pos)
 	local connections = {}
 
 	for _, r in ipairs(mesecon.rules.default) do
-		if wire_getconnect(pos, mesecon.addPosRule(pos, r)) then
+		if wire_getconnect(pos, vector.add(pos, r)) then
 			table.insert(connections, r)
 		end
 	end
@@ -83,7 +83,7 @@ local update_on_place_dig = function (pos, node)
 	if (not rules) then return end
 
 	for _, r in ipairs(mesecon.flattenrules(rules)) do
-		local np = mesecon.addPosRule(pos, r)
+		local np = vector.add(pos, r)
 		if minetest.registered_nodes[minetest.get_node(np).name]
 		and minetest.registered_nodes[minetest.get_node(np).name].mesecon_wire then
 			wire_updateconnect(np)

mods/mesecons/mesecons_detector/init.lua

@@ -4,6 +4,7 @@ local GET_COMMAND = "GET"
 -- Detects players in a certain radius
 -- The radius can be specified in mesecons/settings.lua
 
+-- The following file was modified to detect multiple players
 local object_detector_make_formspec = function (pos)
 	local meta = minetest.get_meta(pos)
 	meta:set_string("formspec", "size[9,2.5]" ..
@@ -101,43 +102,44 @@ minetest.register_craft({
 	}
 })
 
-minetest.register_abm(
+minetest.register_abm({
-	{nodenames = {"mesecons_detector:object_detector_off"},
+	nodenames = {"mesecons_detector:object_detector_off"},
-	interval = 1.0,
+	interval = 1,
 	chance = 1,
-	action = function(pos)
+	action = function(pos, node)
-		if object_detector_scan(pos) then
+		if not object_detector_scan(pos) then return end
-			minetest.swap_node(pos, {name = "mesecons_detector:object_detector_on"})
+
-			mesecon.receptor_on(pos, mesecon.rules.pplate)
+		node.name = "mesecons_detector:object_detector_on"
-		end
+		minetest.swap_node(pos, node)
+		mesecon.receptor_on(pos, mesecon.rules.pplate)
 	end,
 })
 
-minetest.register_abm(
+minetest.register_abm({
-	{nodenames = {"mesecons_detector:object_detector_on"},
+	nodenames = {"mesecons_detector:object_detector_on"},
-	interval = 1.0,
+	interval = 1,
 	chance = 1,
-	action = function(pos)
+	action = function(pos, node)
-		if not object_detector_scan(pos) then
+		if object_detector_scan(pos) then return end
-			minetest.swap_node(pos, {name = "mesecons_detector:object_detector_off"})
+
-			mesecon.receptor_off(pos, mesecon.rules.pplate)
+		node.name = "mesecons_detector:object_detector_off"
-		end
+		minetest.swap_node(pos, node)
+		mesecon.receptor_off(pos, mesecon.rules.pplate)
 	end,
 })
 
 -- Node detector
 -- Detects the node in front of it
 
-local node_detector_make_formspec = function (pos)
+local function node_detector_make_formspec(pos)
-	local meta = minetest.get_meta(pos)
+	minetest.get_meta(pos):set_string("formspec", "size[9,2.5]" ..
-	meta:set_string("formspec", "size[9,2.5]" ..
 		"field[0.3,  0;9,2;scanname;Name of node to scan for (empty for any):;${scanname}]"..
 		"field[0.3,1.5;4,2;digiline_channel;Digiline Channel (optional):;${digiline_channel}]"..
 		"button_exit[7,0.75;2,3;;Save]")
 end
 
-local node_detector_on_receive_fields = function(pos, formname, fields)
+local function node_detector_on_receive_fields(pos, _, fields)
-	if not fields.scanname or not fields.digiline_channel then return end;
+	if not fields.scanname or not fields.digiline_channel then return end
 
 	local meta = minetest.get_meta(pos)
 	meta:set_string("scanname", fields.scanname)
@@ -145,41 +147,59 @@ local node_detector_on_receive_fields = function(pos, formname, fields)
 	node_detector_make_formspec(pos)
 end
 
--- returns true if player was found, false if not
+-- returns true if node was found, false if not
-local node_detector_scan = function (pos)
+local function node_detector_scan(pos)
-	if not pos then return end
 	local node = minetest.get_node_or_nil(pos)
 	if not node then return end
-	local scandir = minetest.facedir_to_dir(node.param2)
+
-	if not scandir then return end
+	local frontname = minetest.get_node(
-	local frontpos = vector.subtract(pos, scandir)
+		vector.subtract(pos, minetest.facedir_to_dir(node.param2))
-	local frontnode = minetest.get_node(frontpos)
+	).name
-	local meta = minetest.get_meta(pos)
+	local scanname = minetest.get_meta(pos):get_string("scanname")
-	return (frontnode.name == meta:get_string("scanname")) or
+
-		(frontnode.name ~= "air" and frontnode.name ~= "ignore" and meta:get_string("scanname") == "")
+	return (frontname == scanname) or
+		(frontname ~= "air" and frontname ~= "ignore" and scanname == "")
 end
 
 -- set player name when receiving a digiline signal on a specific channel
 local node_detector_digiline = {
 	effector = {
-		action = function (pos, node, channel, msg)
+		action = function(pos, node, channel, msg)
 			local meta = minetest.get_meta(pos)
-			local active_channel = meta:get_string("digiline_channel")
+			if channel ~= meta:get_string("digiline_channel") then return end
-			if channel == active_channel then
+
-				if msg == GET_COMMAND then
+			if msg == GET_COMMAND then
-					local frontpos = vector.subtract(pos, minetest.facedir_to_dir(node.param2))
+				local nodename = minetest.get_node(
-					local name = minetest.get_node(frontpos).name
+					vector.subtract(pos, minetest.facedir_to_dir(node.param2))
-					digiline:receptor_send(pos, digiline.rules.default, channel, name)
+				).name
-				else
+
-					meta:set_string("scanname", msg)
+				digiline:receptor_send(pos, digiline.rules.default, channel, nodename)
-					node_detector_make_formspec(pos)
+			else
-				end
+				meta:set_string("scanname", msg)
+				node_detector_make_formspec(pos)
 			end
 		end,
 	},
 	receptor = {}
 }
 
+local function after_place_node_detector(pos, placer)
+	local placer_pos = placer:getpos()
+	if not placer_pos then
+		return
+	end
+
+	--correct for the player's height
+	if placer:is_player() then
+		placer_pos.y = placer_pos.y + 1.625
+	end
+
+	--correct for 6d facedir
+	local node = minetest.get_node(pos)
+	node.param2 = minetest.dir_to_facedir(vector.subtract(pos, placer_pos), true)
+	minetest.set_node(pos, node)
+end
+
 minetest.register_node("mesecons_detector:node_detector_off", {
 	tiles = {"default_steel_block.png", "default_steel_block.png", "default_steel_block.png", "default_steel_block.png", "default_steel_block.png", "jeija_node_detector_off.png"},
 	paramtype = "light",
@@ -192,25 +212,7 @@ minetest.register_node("mesecons_detector:node_detector_off", {
 	}},
 	on_construct = node_detector_make_formspec,
 	on_receive_fields = node_detector_on_receive_fields,
-	after_place_node = function (pos, placer)
+	after_place_node = after_place_node_detector,
-		local placer_pos = placer:getpos()
-
-		--correct for the player's height
-		if placer:is_player() then placer_pos.y = placer_pos.y + 1.5 end
-
-		--correct for 6d facedir
-		if placer_pos then
-			local dir = {
-				x = pos.x - placer_pos.x,
-				y = pos.y - placer_pos.y,
-				z = pos.z - placer_pos.z
-			}
-			local node = minetest.get_node(pos)
-			node.param2 = minetest.dir_to_facedir(dir, true)
-			minetest.set_node(pos, node)
-			minetest.log("action", "real (6d) facedir: " .. node.param2)
-		end
-	end,
 	sounds = default.node_sound_stone_defaults(),
 	digiline = node_detector_digiline
 })
@@ -227,25 +229,7 @@ minetest.register_node("mesecons_detector:node_detector_on", {
 	}},
 	on_construct = node_detector_make_formspec,
 	on_receive_fields = node_detector_on_receive_fields,
-	after_place_node = function (pos, placer)
+	after_place_node = after_place_node_detector,
-		local placer_pos = placer:getpos()
-
-		--correct for the player's height
-		if placer:is_player() then placer_pos.y = placer_pos.y + 1.5 end
-
-		--correct for 6d facedir
-		if placer_pos then
-			local dir = {
-				x = pos.x - placer_pos.x,
-				y = pos.y - placer_pos.y,
-				z = pos.z - placer_pos.z
-			}
-			local node = minetest.get_node(pos)
-			node.param2 = minetest.dir_to_facedir(dir, true)
-			minetest.set_node(pos, node)
-			minetest.log("action", "real (6d) facedir: " .. node.param2)
-		end
-	end,
 	sounds = default.node_sound_stone_defaults(),
 	digiline = node_detector_digiline
 })
@@ -259,26 +243,28 @@ minetest.register_craft({
 	}
 })
 
-minetest.register_abm(
+minetest.register_abm({
-	{nodenames = {"mesecons_detector:node_detector_off"},
+	nodenames = {"mesecons_detector:node_detector_off"},
-	interval = 1.0,
+	interval = 1,
 	chance = 1,
 	action = function(pos, node)
-		if node_detector_scan(pos) then
+		if not node_detector_scan(pos) then return end
-			minetest.swap_node(pos, {name = "mesecons_detector:node_detector_on", param2 = node.param2})
+
-			mesecon.receptor_on(pos)
+		node.name = "mesecons_detector:node_detector_on"
-		end
+		minetest.swap_node(pos, node)
+		mesecon.receptor_on(pos)
 	end,
 })
 
-minetest.register_abm(
+minetest.register_abm({
-	{nodenames = {"mesecons_detector:node_detector_on"},
+	nodenames = {"mesecons_detector:node_detector_on"},
-	interval = 1.0,
+	interval = 1,
 	chance = 1,
 	action = function(pos, node)
-		if not node_detector_scan(pos) then
+		if node_detector_scan(pos) then return end
-			minetest.swap_node(pos, {name = "mesecons_detector:node_detector_off", param2 = node.param2})
+
-			mesecon.receptor_off(pos)
+		node.name = "mesecons_detector:node_detector_off"
-		end
+		minetest.swap_node(pos, node)
+		mesecon.receptor_off(pos)
 	end,
 })

mods/mesecons/mesecons_doors/init.lua

@@ -20,31 +20,53 @@ local function on_rightclick(pos, dir, check_name, replace, replace_dir, params)
 end
 
 local function meseconify_door(name)
-	if not minetest.registered_items[name] then return end
+	if minetest.registered_items[name .. "_b_1"] then
+		-- old style double-node doors
+		local function toggle_state1 (pos, node)
+			on_rightclick(pos, 1, name.."_t_1", name.."_b_2", name.."_t_2", {1,2,3,0})
+		end
 
-	local function toggle_state1 (pos, node)
+		local function toggle_state2 (pos, node)
-		on_rightclick(pos, 1, name.."_t_1", name.."_b_2", name.."_t_2", {1,2,3,0})
+			on_rightclick(pos, 1, name.."_t_2", name.."_b_1", name.."_t_1", {3,0,1,2})
+		end
+
+		minetest.override_item(name.."_b_1", {
+			mesecons = {effector = {
+				action_on = toggle_state1,
+				action_off = toggle_state1,
+				rules = mesecon.rules.pplate
+			}}
+		})
+
+		minetest.override_item(name.."_b_2", {
+			mesecons = {effector = {
+				action_on = toggle_state2,
+				action_off = toggle_state2,
+				rules = mesecon.rules.pplate
+			}}
+		})
+	elseif minetest.registered_items[name .. "_a"] then
+		-- new style mesh node based doors
+		local override = {
+			mesecons = {effector = {
+				action_on = function(pos, node)
+					local door = doors.get(pos)
+					if door then
+						door:open()
+					end
+				end,
+				action_off = function(pos, node)
+					local door = doors.get(pos)
+					if door then
+						door:close()
+					end
+				end,
+				rules = mesecon.rules.pplate
+			}}
+		}
+		minetest.override_item(name .. "_a", override)
+		minetest.override_item(name .. "_b", override)
 	end
-
-	local function toggle_state2 (pos, node)
-		on_rightclick(pos, 1, name.."_t_2", name.."_b_1", name.."_t_1", {3,0,1,2})
-	end
-
-	minetest.override_item(name.."_b_1", {
-		mesecons = {effector = {
-			action_on = toggle_state1,
-			action_off = toggle_state1,
-			rules = mesecon.rules.pplate
-		}},
-	})
-
-	minetest.override_item(name.."_b_2", {
-		mesecons = {effector = {
-			action_on = toggle_state2,
-			action_off = toggle_state2,
-			rules = mesecon.rules.pplate
-		}},
-	})
 end
 
 meseconify_door("doors:door_wood")
@@ -67,18 +89,41 @@ local function trapdoor_switch(pos, node)
 	minetest.get_meta(pos):set_int("state", state == 1 and 0 or 1)
 end
 
-if minetest.registered_nodes["doors:trapdoor"] then
+if doors and doors.get then
-	minetest.override_item("doors:trapdoor", {
+	local override = {
 		mesecons = {effector = {
-			action_on = trapdoor_switch,
+			action_on = function(pos, node)
-			action_off = trapdoor_switch
+				local door = doors.get(pos)
+				if door then
+					door:open()
+				end
+			end,
+			action_off = function(pos, node)
+				local door = doors.get(pos)
+				if door then
+					door:close()
+				end
+			end,
 		}},
-	})
+	}
+	minetest.override_item("doors:trapdoor", override)
+	minetest.override_item("doors:trapdoor_open", override)
+	minetest.override_item("doors:trapdoor_steel", override)
+	minetest.override_item("doors:trapdoor_steel_open", override)
+else
+	if minetest.registered_nodes["doors:trapdoor"] then
+		minetest.override_item("doors:trapdoor", {
+			mesecons = {effector = {
+				action_on = trapdoor_switch,
+				action_off = trapdoor_switch
+			}},
+		})
 
-	minetest.override_item("doors:trapdoor_open", {
+		minetest.override_item("doors:trapdoor_open", {
-		mesecons = {effector = {
+			mesecons = {effector = {
-			action_on = trapdoor_switch,
+				action_on = trapdoor_switch,
-			action_off = trapdoor_switch
+				action_off = trapdoor_switch
-		}},
+			}},
-	})
+		})
+	end
 end

mods/mesecons/mesecons_extrawires/vertical.lua

@@ -42,33 +42,37 @@ local vertical_updatepos = function (pos)
 	local node = minetest.get_node(pos)
 	if minetest.registered_nodes[node.name]
 	and minetest.registered_nodes[node.name].is_vertical_conductor then
-		local node_above = minetest.get_node(mesecon.addPosRule(pos, vertical_rules[1]))
+		local node_above = minetest.get_node(vector.add(pos, vertical_rules[1]))
-		local node_below = minetest.get_node(mesecon.addPosRule(pos, vertical_rules[2]))
+		local node_below = minetest.get_node(vector.add(pos, vertical_rules[2]))
-		local namestate = minetest.registered_nodes[node.name].vertical_conductor_state
 
 		local above = minetest.registered_nodes[node_above.name]
 			and minetest.registered_nodes[node_above.name].is_vertical_conductor
 		local below = minetest.registered_nodes[node_below.name]
 			and minetest.registered_nodes[node_below.name].is_vertical_conductor
 
-		local basename = "mesecons_extrawires:vertical_"
+		mesecon.on_dignode(pos, node)
+
+		-- Always place offstate conductor and let mesecon.on_placenode take care
+		local newname = "mesecons_extrawires:vertical_"
 		if above and below then -- above and below: vertical mesecon
-			minetest.add_node(pos, {name = basename .. namestate})
+			newname = newname .. "off"
 		elseif above and not below then -- above only: bottom
-			minetest.add_node(pos, {name = basename .. "bottom_" .. namestate})
+			newname = newname .. "bottom_off"
 		elseif not above and below then -- below only: top
-			minetest.add_node(pos, {name = basename .. "top_" .. namestate})
+			newname = newname .. "top_off"
 		else -- no vertical wire above, no vertical wire below: use bottom
-			minetest.add_node(pos, {name = basename .. "bottom_" .. namestate})
+			newname = newname .. "bottom_off"
 		end
-		mesecon.update_autoconnect(pos)
+
+		minetest.set_node(pos, {name = newname})
+		mesecon.on_placenode(pos, {name = newname})
 	end
 end
 
 local vertical_update = function (pos, node)
 	vertical_updatepos(pos) -- this one
-	vertical_updatepos(mesecon.addPosRule(pos, vertical_rules[1])) -- above
+	vertical_updatepos(vector.add(pos, vertical_rules[1])) -- above
-	vertical_updatepos(mesecon.addPosRule(pos, vertical_rules[2])) -- below
+	vertical_updatepos(vector.add(pos, vertical_rules[2])) -- below
 end
 
 -- Vertical wire
@@ -87,7 +91,6 @@ mesecon.register_node("mesecons_extrawires:vertical", {
 },{
 	tiles = {"mesecons_wire_off.png"},
 	groups = {dig_immediate=2}, --MFF
-	vertical_conductor_state = "off",
 	mesecons = {conductor = {
 		state = mesecon.state.off,
 		onstate = "mesecons_extrawires:vertical_on",
@@ -96,7 +99,6 @@ mesecon.register_node("mesecons_extrawires:vertical", {
 },{
 	tiles = {"mesecons_wire_on.png"},
 	groups = {dig_immediate=2, not_in_creative_inventory=1}, --MFF
-	vertical_conductor_state = "on",
 	mesecons = {conductor = {
 		state = mesecon.state.on,
 		offstate = "mesecons_extrawires:vertical_off",
@@ -120,7 +122,6 @@ mesecon.register_node("mesecons_extrawires:vertical_top", {
 	after_dig_node = vertical_update
 },{
 	tiles = {"mesecons_wire_off.png"},
-	vertical_conductor_state = "off",
 	mesecons = {conductor = {
 		state = mesecon.state.off,
 		onstate = "mesecons_extrawires:vertical_top_on",
@@ -128,7 +129,6 @@ mesecon.register_node("mesecons_extrawires:vertical_top", {
 	}}
 },{
 	tiles = {"mesecons_wire_on.png"},
-	vertical_conductor_state = "on",
 	mesecons = {conductor = {
 		state = mesecon.state.on,
 		offstate = "mesecons_extrawires:vertical_top_off",
@@ -152,7 +152,6 @@ mesecon.register_node("mesecons_extrawires:vertical_bottom", {
 	after_dig_node = vertical_update
 },{
 	tiles = {"mesecons_wire_off.png"},
-	vertical_conductor_state = "off",
 	mesecons = {conductor = {
 		state = mesecon.state.off,
 		onstate = "mesecons_extrawires:vertical_bottom_on",
@@ -160,7 +159,6 @@ mesecon.register_node("mesecons_extrawires:vertical_bottom", {
 	}}
 },{
 	tiles = {"mesecons_wire_on.png"},
-	vertical_conductor_state = "on",
 	mesecons = {conductor = {
 		state = mesecon.state.on,
 		offstate = "mesecons_extrawires:vertical_bottom_off",

mods/mesecons/mesecons_hydroturbine/init.lua

@@ -60,7 +60,7 @@ nodenames = {"mesecons_hydroturbine:hydro_turbine_off"},
 	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" or minetest.get_node(waterpos).name == "default:river_water_flowing" then
-			minetest.add_node(pos, {name="mesecons_hydroturbine:hydro_turbine_on"})
+			minetest.set_node(pos, {name="mesecons_hydroturbine:hydro_turbine_on"})
 			nodeupdate(pos)
 			mesecon.receptor_on(pos)
 		end
@@ -74,7 +74,7 @@ nodenames = {"mesecons_hydroturbine:hydro_turbine_on"},
 	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" or minetest.get_node(waterpos).name ~= "default:river_water_flowing" then
-			minetest.add_node(pos, {name="mesecons_hydroturbine:hydro_turbine_off"})
+			minetest.set_node(pos, {name="mesecons_hydroturbine:hydro_turbine_off"})
 			nodeupdate(pos)
 			mesecon.receptor_off(pos)
 		end

mods/mesecons/mesecons_mvps/init.lua

@@ -15,10 +15,16 @@ end
 
 -- Nodes that cannot be pushed / pulled by movestones, pistons
 function mesecon.is_mvps_stopper(node, pushdir, stack, stackid)
+	-- unknown nodes are always stoppers
+	if not minetest.registered_nodes[node.name] then
+		return true
+	end
+
 	local get_stopper = mesecon.mvps_stoppers[node.name]
 	if type (get_stopper) == "function" then
 		get_stopper = get_stopper(node, pushdir, stack, stackid)
 	end
+
 	return get_stopper
 end
 
@@ -47,6 +53,17 @@ function mesecon.mvps_process_stack(stack)
 	end
 end
 
+-- tests if the node can be pushed into, e.g. air, water, grass
+local function node_replaceable(name)
+	if name == "ignore" then return true end
+
+	if minetest.registered_nodes[name] then
+		return minetest.registered_nodes[name].buildable_to or false
+	end
+
+	return false
+end
+
 function mesecon.mvps_get_stack(pos, dir, maximum, all_pull_sticky)
 	-- determine the number of nodes to be pushed
 	local nodes = {}
@@ -56,9 +73,7 @@ function mesecon.mvps_get_stack(pos, dir, maximum, all_pull_sticky)
 		local np = frontiers[1]
 		local nn = minetest.get_node(np)
 
-		if nn.name ~= "air"
+		if not node_replaceable(nn.name) then
-		and minetest.registered_nodes[nn.name]
-		and minetest.registered_nodes[nn.name].liquidtype == "none" then
 			table.insert(nodes, {node = nn, pos = np})
 			if #nodes > maximum then return nil end
 
@@ -160,9 +175,9 @@ function mesecon.mvps_push_or_pull(pos, stackdir, movedir, maximum, all_pull_sti
 
 	-- add nodes
 	for _, n in ipairs(nodes) do
-		local np = mesecon.addPosRule(n.pos, movedir)
+		local np = vector.add(n.pos, movedir)
 
-		minetest.add_node(np, n.node)
+		minetest.set_node(np, n.node)
 		minetest.get_meta(np):from_table(n.meta)
 	end
 
@@ -171,7 +186,7 @@ function mesecon.mvps_push_or_pull(pos, stackdir, movedir, maximum, all_pull_sti
 	for i in ipairs(nodes) do
 		moved_nodes[i] = {}
 		moved_nodes[i].oldpos = nodes[i].pos
-		nodes[i].pos = mesecon.addPosRule(nodes[i].pos, movedir)
+		nodes[i].pos = vector.add(nodes[i].pos, movedir)
 		moved_nodes[i].pos = nodes[i].pos
 		moved_nodes[i].node = nodes[i].node
 		moved_nodes[i].meta = nodes[i].meta
@@ -192,12 +207,8 @@ end)
 function mesecon.mvps_move_objects(pos, dir, nodestack)
 	local objects_to_move = {}
 
-	-- Move object at tip of stack
+	-- Move object at tip of stack, pushpos is position at tip of stack
-	local pushpos = mesecon.addPosRule(pos, -- get pos at tip of stack
+	local pushpos = vector.add(pos, vector.multiply(dir, #nodestack))
-		{x = dir.x * #nodestack,
-		 y = dir.y * #nodestack,
-		 z = dir.z * #nodestack})
-
 
 	local objects = minetest.get_objects_inside_radius(pushpos, 1)
 	for _, obj in ipairs(objects) do
@@ -208,7 +219,7 @@ function mesecon.mvps_move_objects(pos, dir, nodestack)
 	if tonumber(minetest.setting_get("movement_gravity")) > 0 and dir.y == 0 then
 		-- If gravity positive and dir horizontal, push players standing on the stack
 		for _, n in ipairs(nodestack) do
-			local p_above = mesecon.addPosRule(n.pos, {x=0, y=1, z=0})
+			local p_above = vector.add(n.pos, {x=0, y=1, z=0})
 			local objects = minetest.get_objects_inside_radius(p_above, 1)
 			for _, obj in ipairs(objects) do
 				table.insert(objects_to_move, obj)
@@ -219,7 +230,7 @@ function mesecon.mvps_move_objects(pos, dir, nodestack)
 	for _, obj in ipairs(objects_to_move) do
 		local entity = obj:get_luaentity()
 		if not entity or not mesecon.is_mvps_unmov(entity.name) then
-			local np = mesecon.addPosRule(obj:getpos(), dir)
+			local np = vector.add(obj:getpos(), dir)
 
 			--move only if destination is not solid
 			local nn = minetest.get_node(np)

mods/mesecons/mesecons_noteblock/init.lua

@@ -5,7 +5,7 @@ minetest.register_node("mesecons_noteblock:noteblock", {
 	on_punch = function(pos, node) -- change sound when punched
 		node.param2 = (node.param2+1)%12
 		mesecon.noteblock_play(pos, node.param2)
-		minetest.add_node(pos, node)
+		minetest.set_node(pos, node)
 	end,
 	sounds = default.node_sound_wood_defaults(),
 	mesecons = {effector = { -- play sound when activated

mods/mesecons/mesecons_pistons/init.lua

@@ -57,7 +57,7 @@ end
 local piston_remove_pusher = function(pos, node)
 	local pistonspec = minetest.registered_nodes[node.name].mesecons_piston
 	local dir = piston_get_direction(pistonspec.dir, node)
-	local pusherpos = mesecon.addPosRule(pos, dir)
+	local pusherpos = vector.add(pos, dir)
 	local pushername = minetest.get_node(pusherpos).name
 
 	-- make sure there actually is a pusher (for compatibility reasons mainly)
@@ -78,12 +78,12 @@ local piston_on = function(pos, node)
 	local pistonspec = minetest.registered_nodes[node.name].mesecons_piston
 
 	local dir = piston_get_direction(pistonspec.dir, node)
-	local np = mesecon.addPosRule(pos, dir)
+	local np = vector.add(pos, dir)
 	local maxpush = mesecon.setting("piston_max_push", 15)
 	local success, stack, oldstack = mesecon.mvps_push(np, dir, maxpush)
 	if success then
-		minetest.add_node(pos, {param2 = node.param2, name = pistonspec.onname})
+		minetest.set_node(pos, {param2 = node.param2, name = pistonspec.onname})
-		minetest.add_node(np,  {param2 = node.param2, name = pistonspec.pusher})
+		minetest.set_node(np,  {param2 = node.param2, name = pistonspec.pusher})
 		minetest.sound_play("piston_extend", {
 			pos = pos,
 			max_hear_distance = 20,
@@ -96,7 +96,7 @@ end
 
 local piston_off = function(pos, node)
 	local pistonspec = minetest.registered_nodes[node.name].mesecons_piston
-	minetest.add_node(pos, {param2 = node.param2, name = pistonspec.offname})
+	minetest.set_node(pos, {param2 = node.param2, name = pistonspec.offname})
 	piston_remove_pusher(pos, node)
 
 	if pistonspec.sticky then
@@ -117,10 +117,16 @@ local piston_orientate = function(pos, placer)
 
 	local node = minetest.get_node(pos)
 	local pistonspec = minetest.registered_nodes[node.name].mesecons_piston
-	if pitch > 55 then --looking upwards
+
-		minetest.add_node(pos, {name=pistonspec.piston_down})
+	-- looking upwards (pitch > 55) / looking downwards (pitch < -55)
-	elseif pitch < -55 then --looking downwards
+	local nn = nil
-		minetest.add_node(pos, {name=pistonspec.piston_up})
+	if pitch > 55 then nn = {name = pistonspec.piston_down} end
+	if pitch < -55 then nn = {name = pistonspec.piston_up} end
+
+	if nn then
+		minetest.set_node(pos, nn)
+		-- minetest.after, because on_placenode for unoriented piston must be processed first
+		minetest.after(0, mesecon.on_placenode, pos, nn)
 	end
 end
 
@@ -719,12 +725,12 @@ end
 local piston_get_stopper = function (node, dir, stack, stackid)
 	pistonspec = minetest.registered_nodes[node.name].mesecons_piston
 	dir = piston_get_direction(pistonspec.dir, node)
-	local pusherpos  = mesecon.addPosRule(stack[stackid].pos, dir)
+	local pusherpos  = vector.add(stack[stackid].pos, dir)
 	local pushernode = minetest.get_node(pusherpos)
 
 	if minetest.registered_nodes[node.name].mesecons_piston.pusher == pushernode.name then
 		for _, s in ipairs(stack) do
-			if  mesecon.cmpPos(s.pos, pusherpos) -- pusher is also to be pushed
+			if  vector.equals(s.pos, pusherpos) -- pusher is also to be pushed
 			and s.node.param2 == node.param2 then
 				return false
 			end

mods/mesecons/mesecons_pressureplates/init.lua

@@ -17,16 +17,16 @@ pp_on_timer = function (pos, elapsed)
 	if not basename then return end
 
 	local objs   = minetest.get_objects_inside_radius(pos, 1)
-	local two_below = mesecon.addPosRule(pos, {x = 0, y = -2, z = 0})
+	local two_below = vector.add(pos, vector.new(0, -2, 0))
 
 	if objs[1] == nil and node.name == basename .. "_on" then
-		minetest.add_node(pos, {name = basename .. "_off"})
+		minetest.set_node(pos, {name = basename .. "_off"})
 		mesecon.receptor_off(pos, mesecon.rules.pplate)
 	elseif node.name == basename .. "_off" then
 		for k, obj in pairs(objs) do
 			local objpos = obj:getpos()
 			if objpos.y > pos.y-1 and objpos.y < pos.y then
-				minetest.add_node(pos, {name = basename .. "_on"})
+				minetest.set_node(pos, {name = basename .. "_on"})
 				mesecon.receptor_on(pos, mesecon.rules.pplate )
 			end
 		end

mods/mesecons/mesecons_random/init.lua

@@ -66,10 +66,10 @@ minetest.register_node("mesecons_random:ghoststone_active", {
 		offstate = "mesecons_random:ghoststone"
 	}},
 	on_construct = function(pos)
-		--remove shadow
+		-- remove shadow
-		pos2 = {x = pos.x, y = pos.y + 1, z = pos.z}
+		shadowpos = vector.add(pos, vector.new(0, 1, 0))
-		if ( minetest.get_node(pos2).name == "air" ) then
+		if (minetest.get_node(shadowpos).name == "air") then
-			minetest.dig_node(pos2)
+			minetest.dig_node(shadowpos)
 		end
 	end
 })

mods/mesecons/mesecons_receiver/init.lua

@@ -105,10 +105,10 @@ function mesecon.receiver_place(rcpt_pos)
 	if string.find(nn.name, "mesecons:wire_") ~= nil then
 		minetest.dig_node(pos)
 		if mesecon.is_power_on(rcpt_pos) then
-			minetest.add_node(pos, {name = "mesecons_receiver:receiver_on", param2 = node.param2})
+			minetest.set_node(pos, {name = "mesecons_receiver:receiver_on", param2 = node.param2})
 			mesecon.receptor_on(pos, receiver_get_rules(node))
 		else
-			minetest.add_node(pos, {name = "mesecons_receiver:receiver_off", param2 = node.param2})
+			minetest.set_node(pos, {name = "mesecons_receiver:receiver_off", param2 = node.param2})
 		end
 		mesecon.update_autoconnect(pos)
 	end
@@ -120,7 +120,7 @@ function mesecon.receiver_remove(rcpt_pos, dugnode)
 	if string.find(nn.name, "mesecons_receiver:receiver_") ~=nil then
 		minetest.dig_node(pos)
 		local node = {name = "mesecons:wire_00000000_off"}
-		minetest.add_node(pos, node)
+		minetest.set_node(pos, node)
 		mesecon.update_autoconnect(pos)
 		mesecon.on_placenode(pos, node)
 	end

mods/mesecons/mesecons_torch/init.lua

@@ -91,7 +91,7 @@ minetest.register_abm({
 	action = function(pos, node)
 		local is_powered = false
 		for _, rule in ipairs(torch_get_input_rules(node)) do
-			local src = mesecon.addPosRule(pos, rule)
+			local src = vector.add(pos, rule)
 			if mesecon.is_power_on(src) then
 				is_powered = true
 			end