Document inactive block behaviour (#447)

Add check nil var with bug from crash server.
fixes #438

README.md

@@ -22,9 +22,9 @@ OK, I want in.
 --------------
 Go get it!
 
-[DOWNLOAD IT NOW](https://github.com/Jeija/minetest-mod-mesecons/archive/master.zip)
+[DOWNLOAD IT NOW](https://github.com/minetest-mods/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:
+Now go ahead and install it like any other Minetest mod. Don't know how? Check out [the wonderful page about it](https://wiki.minetest.net/Mods) over at the official Minetest Wiki. For your convenience, here's a quick summary:
 
 1. If Mesecons is still in a ZIP file, extract the folder inside to somewhere on the computer.
 2. Make sure that when you open the folder, you can directly find `README.md` in the listing. If you just see another folder, move that folder up one level and delete the old one.
@@ -43,9 +43,11 @@ Or maybe a [comprehensive reference](http://mesecons.net/items.html) is your sty
 
 An overview for the very newest of new beginners? How does [this one](http://uberi.mesecons.net/projects/MeseconsBasics/index.html) look?
 
+There is also a [wiki page](https://wiki.minetest.net/Mods/Mesecons) dedicated to this mod.
+
 Want to get more into building? Why not check out the [Mesecons Laboratory](http://uberi.mesecons.net/), a website dedicated to advanced Mesecons builders?
 
-Want to contribute to Mesecons itself? Check out the [source code](https://github.com/Jeija/minetest-mod-mesecons)!
+Want to contribute to Mesecons itself? Check out the [source code](https://github.com/minetest-mods/mesecons)!
 
 Who wrote it anyways?
 ---------------------

bower.json

@@ -0,0 +1,12 @@
+{
+    "name": "mesecons",
+    "description": "Mesecons is a mod for Minetest that implements items related to digital circuitry: wires, buttons, lights, and programmable controllers.",
+    "homepage": "http://mesecons.net",
+    "authors": "Jeija",
+    "license": "LGPL-3.0+",
+    "keywords": [
+        "mesecons",
+        "minetest",
+        "mod"
+    ]
+}

documentation.json

@@ -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/internal.lua

@@ -548,52 +548,3 @@ function mesecon.is_powered(pos, rule)
 	if (#sourcepos == 0) then return false
 	else return sourcepos end
 end
-
---Rules rotation Functions:
-function mesecon.rotate_rules_right(rules)
-	local nr = {}
-	for i, rule in ipairs(rules) do
-		table.insert(nr, {
-			x = -rule.z,
-			y =  rule.y,
-			z =  rule.x,
-			name = rule.name})
-	end
-	return nr
-end
-
-function mesecon.rotate_rules_left(rules)
-	local nr = {}
-	for i, rule in ipairs(rules) do
-		table.insert(nr, {
-			x =  rule.z,
-			y =  rule.y,
-			z = -rule.x,
-			name = rule.name})
-	end
-	return nr
-end
-
-function mesecon.rotate_rules_down(rules)
-	local nr = {}
-	for i, rule in ipairs(rules) do
-		table.insert(nr, {
-			x = -rule.y,
-			y =  rule.x,
-			z =  rule.z,
-			name = rule.name})
-	end
-	return nr
-end
-
-function mesecon.rotate_rules_up(rules)
-	local nr = {}
-	for i, rule in ipairs(rules) do
-		table.insert(nr, {
-			x =  rule.y,
-			y = -rule.x,
-			z =  rule.z,
-			name = rule.name})
-	end
-	return nr
-end

mesecons/oldwires.lua

@@ -4,7 +4,7 @@ minetest.register_node("mesecons:mesecon_off", {
 	inventory_image = "jeija_mesecon_off.png",
 	wield_image = "jeija_mesecon_off.png",
 	paramtype = "light",
-	is_ground_content = true,
+	is_ground_content = false,
 	walkable = false,
 	selection_box = {
 		type = "fixed",
@@ -22,7 +22,7 @@ minetest.register_node("mesecons:mesecon_on", {
 	drawtype = "raillike",
 	tiles = {"jeija_mesecon_on.png", "jeija_mesecon_curved_on.png", "jeija_mesecon_t_junction_on.png", "jeija_mesecon_crossing_on.png"},
 	paramtype = "light",
-	is_ground_content = true,
+	is_ground_content = false,
 	walkable = false,
 	selection_box = {
 		type = "fixed",
@@ -30,7 +30,7 @@ minetest.register_node("mesecons:mesecon_on", {
 	},
 	groups = {dig_immediate=3, not_in_creaive_inventory=1, mesecon=1},
 	drop = "mesecons:mesecon_off 1",
-	light_source = default.LIGHT_MAX-11,
+	light_source = minetest.LIGHT_MAX-11,
 	mesecons = {conductor={
 		state = mesecon.state.on,
 		offstate = "mesecons:mesecon_off"

mesecons/presets.lua

@@ -1,54 +1,85 @@
 mesecon.rules = {}
 mesecon.state = {}
 
-mesecon.rules.default =
-{{x=0,  y=0,  z=-1},
- {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=-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},
- {x=0,  y=-1, z=-1}}
+mesecon.rules.default = {
+	{x =  0, y =  0, z = -1},
+	{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 = -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},
+	{x =  0, y = -1, z = -1},
+}
 
-mesecon.rules.pplate = mesecon.mergetable(mesecon.rules.default, {{x=0, y=-2, z=0}})
+mesecon.rules.floor = mesecon.mergetable(mesecon.rules.default, {{x = 0, y = -1, z = 0}})
 
-mesecon.rules.buttonlike =
-{{x = 1,  y = 0, z = 0},
- {x = 1,  y = 1, z = 0},
- {x = 1,  y =-1, z = 0},
- {x = 1,  y =-1, z = 1},
- {x = 1,  y =-1, z =-1},
- {x = 2,  y = 0, z = 0}}
+mesecon.rules.pplate = mesecon.mergetable(mesecon.rules.floor, {{x = 0, y = -2, z = 0}})
 
-mesecon.rules.flat =
-{{x = 1, y = 0, z = 0},
- {x =-1, y = 0, z = 0},
- {x = 0, y = 0, z = 1},
- {x = 0, y = 0, z =-1}}
+mesecon.rules.buttonlike = {
+	{x = 1,  y =  0, z =  0},
+	{x = 1,  y =  1, z =  0},
+	{x = 1,  y = -1, z =  0},
+	{x = 1,  y = -1, z =  1},
+	{x = 1,  y = -1, z = -1},
+	{x = 2,  y =  0, z =  0},
+}
 
-mesecon.rules.alldirs =
-{{x= 1, y= 0,  z= 0},
- {x=-1, y= 0,  z= 0},
- {x= 0, y= 1,  z= 0},
- {x= 0, y=-1,  z= 0},
- {x= 0, y= 0,  z= 1},
- {x= 0, y= 0,  z=-1}}
+mesecon.rules.flat = {
+	{x =  1, y = 0, z =  0},
+	{x = -1, y = 0, z =  0},
+	{x =  0, y = 0, z =  1},
+	{x =  0, y = 0, z = -1},
+}
+
+mesecon.rules.alldirs = {
+	{x =  1, y =  0,  z =  0},
+	{x = -1, y =  0,  z =  0},
+	{x =  0, y =  1,  z =  0},
+	{x =  0, y = -1,  z =  0},
+	{x =  0, y =  0,  z =  1},
+	{x =  0, y =  0,  z = -1},
+}
+
+local rules_wallmounted = {
+	xp = mesecon.rotate_rules_down(mesecon.rules.floor),
+	xn = mesecon.rotate_rules_up(mesecon.rules.floor),
+	yp = mesecon.rotate_rules_up(mesecon.rotate_rules_up(mesecon.rules.floor)),
+	yn = mesecon.rules.floor,
+	zp = mesecon.rotate_rules_left(mesecon.rotate_rules_up(mesecon.rules.floor)),
+	zn = mesecon.rotate_rules_right(mesecon.rotate_rules_up(mesecon.rules.floor)),
+}
+
+local rules_buttonlike = {
+	xp = mesecon.rules.buttonlike,
+	xn = mesecon.rotate_rules_right(mesecon.rotate_rules_right(mesecon.rules.buttonlike)),
+	yp = mesecon.rotate_rules_down(mesecon.rules.buttonlike),
+	yn = mesecon.rotate_rules_up(mesecon.rules.buttonlike),
+	zp = mesecon.rotate_rules_right(mesecon.rules.buttonlike),
+	zn = mesecon.rotate_rules_left(mesecon.rules.buttonlike),
+}
+
+local function rules_from_dir(ruleset, dir)
+	if dir.x ==  1 then return ruleset.xp end
+	if dir.y ==  1 then return ruleset.yp end
+	if dir.z ==  1 then return ruleset.zp end
+	if dir.x == -1 then return ruleset.xn end
+	if dir.y == -1 then return ruleset.yn end
+	if dir.z == -1 then return ruleset.zn end
+end
+
+mesecon.rules.wallmounted_get = function(node)
+	local dir = minetest.wallmounted_to_dir(node.param2)
+	return rules_from_dir(rules_wallmounted, dir)
+end
 
 mesecon.rules.buttonlike_get = function(node)
-	local rules = mesecon.rules.buttonlike
-	if node.param2 == 2 then
-		rules=mesecon.rotate_rules_left(rules)
-	elseif node.param2 == 3 then
-		rules=mesecon.rotate_rules_right(mesecon.rotate_rules_right(rules))
-	elseif node.param2 == 0 then
-		rules=mesecon.rotate_rules_right(rules)
-	end
-	return rules
+	local dir = minetest.facedir_to_dir(node.param2)
+	return rules_from_dir(rules_buttonlike, dir)
 end
 
 mesecon.state.on = "on"

mesecons/services.lua

@@ -21,7 +21,8 @@ mesecon.on_placenode = function(pos, node)
 			end
 			--mesecon.receptor_on (pos, mesecon.conductor_get_rules(node))
 		elseif mesecon.is_conductor_on(node) then
-			minetest.swap_node(pos, {name = mesecon.get_conductor_off(node)})
+			node.name = mesecon.get_conductor_off(node)
+			minetest.swap_node(pos, node)
 		end
 	end
 
@@ -62,34 +63,74 @@ mesecon.on_dignode = function(pos, node)
 	mesecon.execute_autoconnect_hooks_queue(pos, node)
 end
 
+function mesecon.on_blastnode(pos, intensity)
+	local node = minetest.get_node(pos)
+	minetest.remove_node(pos)
+	mesecon.on_dignode(pos, node)
+	return minetest.get_node_drops(node.name, "")
+end
+
 minetest.register_on_placenode(mesecon.on_placenode)
 minetest.register_on_dignode(mesecon.on_dignode)
 
 -- Overheating service for fast circuits
+local OVERHEAT_MAX = mesecon.setting("overheat_max", 20)
+local COOLDOWN_TIME = mesecon.setting("cooldown_time", 2.0)
+local COOLDOWN_STEP = mesecon.setting("cooldown_granularity", 0.5)
+local COOLDOWN_MULTIPLIER = OVERHEAT_MAX / COOLDOWN_TIME
+local cooldown_timer = 0.0
+local object_heat = {}
 
 -- returns true if heat is too high
-mesecon.do_overheat = function(pos)
-	local meta = minetest.get_meta(pos)
-	local heat = meta:get_int("heat") or 0
-
-	heat = heat + 1
-	meta:set_int("heat", heat)
-
-	if heat < mesecon.setting("overheat_max", 20) then
-		mesecon.queue:add_action(pos, "cooldown", {}, 1, nil, 0)
-	else
+function mesecon.do_overheat(pos)
+	local id = minetest.hash_node_position(pos)
+	local heat = (object_heat[id] or 0) + 1
+	object_heat[id] = heat
+	if heat >= OVERHEAT_MAX then
+		minetest.log("action", "Node overheats at " .. minetest.pos_to_string(pos))
+		object_heat[id] = nil
 		return true
 	end
-
 	return false
 end
 
+function mesecon.do_cooldown(pos)
+	local id = minetest.hash_node_position(pos)
+	object_heat[id] = nil
+end
 
-mesecon.queue:add_function("cooldown", function (pos)
-	local meta = minetest.get_meta(pos)
-	local heat = meta:get_int("heat")
+function mesecon.get_heat(pos)
+	local id = minetest.hash_node_position(pos)
+	return object_heat[id] or 0
+end
 
-	if (heat > 0) then
-		meta:set_int("heat", heat - 1)
+function mesecon.move_hot_nodes(moved_nodes)
+	local new_heat = {}
+	for _, n in ipairs(moved_nodes) do
+		local old_id = minetest.hash_node_position(n.oldpos)
+		local new_id = minetest.hash_node_position(n.pos)
+		new_heat[new_id] = object_heat[old_id]
+		object_heat[old_id] = nil
 	end
-end)
+	for id, heat in pairs(new_heat) do
+		object_heat[id] = heat
+	end
+end
+
+local function global_cooldown(dtime)
+	cooldown_timer = cooldown_timer + dtime
+	if cooldown_timer < COOLDOWN_STEP then
+		return -- don't overload the CPU
+	end
+	local cooldown = COOLDOWN_MULTIPLIER * cooldown_timer
+	cooldown_timer = 0
+	for id, heat in pairs(object_heat) do
+		heat = heat - cooldown
+		if heat <= 0 then
+			object_heat[id] = nil -- free some RAM
+		else
+			object_heat[id] = heat
+		end
+	end
+end
+minetest.register_globalstep(global_cooldown)

mesecons/settings.lua

@@ -1,15 +1,15 @@
 -- SETTINGS
 function mesecon.setting(setting, default)
 	if type(default) == "boolean" then
-		local read = minetest.setting_getbool("mesecon."..setting)
+		local read = minetest.settings:get_bool("mesecon."..setting)
 		if read == nil then
 			return default
 		else
 			return read
 		end
 	elseif type(default) == "string" then
-		return minetest.setting_get("mesecon."..setting) or default
+		return minetest.settings:get("mesecon."..setting) or default
 	elseif type(default) == "number" then
-		return tonumber(minetest.setting_get("mesecon."..setting) or default)
+		return tonumber(minetest.settings:get("mesecon."..setting) or default)
 	end
 end

mesecons/util.lua

@@ -6,6 +6,56 @@ function mesecon.move_node(pos, newpos)
 	minetest.get_meta(pos):from_table(meta)
 end
 
+-- Rules rotation Functions:
+function mesecon.rotate_rules_right(rules)
+	local nr = {}
+	for i, rule in ipairs(rules) do
+		table.insert(nr, {
+			x = -rule.z,
+			y =  rule.y,
+			z =  rule.x,
+			name = rule.name})
+	end
+	return nr
+end
+
+function mesecon.rotate_rules_left(rules)
+	local nr = {}
+	for i, rule in ipairs(rules) do
+		table.insert(nr, {
+			x =  rule.z,
+			y =  rule.y,
+			z = -rule.x,
+			name = rule.name})
+	end
+	return nr
+end
+
+function mesecon.rotate_rules_down(rules)
+	local nr = {}
+	for i, rule in ipairs(rules) do
+		table.insert(nr, {
+			x = -rule.y,
+			y =  rule.x,
+			z =  rule.z,
+			name = rule.name})
+	end
+	return nr
+end
+
+function mesecon.rotate_rules_up(rules)
+	local nr = {}
+	for i, rule in ipairs(rules) do
+		table.insert(nr, {
+			x =  rule.y,
+			y = -rule.x,
+			z =  rule.z,
+			name = rule.name})
+	end
+	return nr
+end
+--
+
 function mesecon.flattenrules(allrules)
 --[[
 	{
@@ -178,6 +228,7 @@ end
 
 function mesecon.register_node(name, spec_common, spec_off, spec_on)
 	spec_common.drop = spec_common.drop or name .. "_off"
+	spec_common.on_blast = spec_common.on_blast or mesecon.on_blastnode
 	spec_common.__mesecon_basename = name
 	spec_on.__mesecon_state = "on"
 	spec_off.__mesecon_state = "off"
@@ -231,11 +282,6 @@ local function hash_blockpos(pos)
 	})
 end
 
--- convert block hash --> node position
-local function unhash_blockpos(hash)
-	return vector.multiply(minetest.get_position_from_hash(hash), BLOCKSIZE)
-end
-
 -- Maps from a hashed mapblock position (as returned by hash_blockpos) to a
 -- table.
 --

mesecons_blinkyplant/doc/blinkyplant/description.html

@@ -1 +1,2 @@
 The blinky plants toggles between on and off state every three seconds. Can be used to make clocks. Also works after having restarted the game.
+It stops blinking in an inactive block, then starts again when the block becomes active.

mesecons_blinkyplant/init.lua

@@ -24,6 +24,7 @@ mesecon.register_node("mesecons_blinkyplant:blinky_plant", {
 	drawtype = "plantlike",
 	inventory_image = "jeija_blinky_plant_off.png",
 	paramtype = "light",
+	is_ground_content = false,
 	walkable = false,
 	sounds = default.node_sound_leaves_defaults(),
 	selection_box = {

mesecons_button/init.lua

@@ -4,12 +4,13 @@
 
 mesecon.button_turnoff = function (pos)
 	local node = minetest.get_node(pos)
-	if node.name=="mesecons_button:button_on" then --has not been dug
-		minetest.swap_node(pos, {name = "mesecons_button:button_off", param2=node.param2})
-		minetest.sound_play("mesecons_button_pop", {pos=pos})
-		local rules = mesecon.rules.buttonlike_get(node)
-		mesecon.receptor_off(pos, rules)
+	if node.name ~= "mesecons_button:button_on" then -- has been dug
+		return
 	end
+	minetest.swap_node(pos, {name = "mesecons_button:button_off", param2 = node.param2})
+	minetest.sound_play("mesecons_button_pop", {pos = pos})
+	local rules = mesecon.rules.buttonlike_get(node)
+	mesecon.receptor_off(pos, rules)
 end
 
 minetest.register_node("mesecons_button:button_off", {
@@ -24,8 +25,10 @@ minetest.register_node("mesecons_button:button_off", {
 	},
 	paramtype = "light",
 	paramtype2 = "facedir",
+	is_ground_content = false,
 	legacy_wallmounted = true,
 	walkable = false,
+	on_rotate = mesecon.buttonlike_onrotate,
 	sunlight_propagates = true,
 	selection_box = {
 	type = "fixed",
@@ -44,13 +47,14 @@ minetest.register_node("mesecons_button:button_off", {
 		minetest.swap_node(pos, {name = "mesecons_button:button_on", param2=node.param2})
 		mesecon.receptor_on(pos, mesecon.rules.buttonlike_get(node))
 		minetest.sound_play("mesecons_button_push", {pos=pos})
-		minetest.after(1, mesecon.button_turnoff, pos)
+		minetest.get_node_timer(pos):start(1)
 	end,
 	sounds = default.node_sound_stone_defaults(),
 	mesecons = {receptor = {
 		state = mesecon.state.off,
 		rules = mesecon.rules.buttonlike_get
-	}}
+	}},
+	on_blast = mesecon.on_blastnode,
 })
 
 minetest.register_node("mesecons_button:button_on", {
@@ -65,9 +69,11 @@ minetest.register_node("mesecons_button:button_on", {
 		},
 	paramtype = "light",
 	paramtype2 = "facedir",
+	is_ground_content = false,
 	legacy_wallmounted = true,
 	walkable = false,
-	light_source = default.LIGHT_MAX-7,
+	on_rotate = false,
+	light_source = minetest.LIGHT_MAX-7,
 	sunlight_propagates = true,
 	selection_box = {
 		type = "fixed",
@@ -87,7 +93,9 @@ minetest.register_node("mesecons_button:button_on", {
 	mesecons = {receptor = {
 		state = mesecon.state.on,
 		rules = mesecon.rules.buttonlike_get
-	}}
+	}},
+	on_timer = mesecon.button_turnoff,
+	on_blast = mesecon.on_blastnode,
 })
 
 minetest.register_craft({

mesecons_commandblock/doc/commandblock/description.html

@@ -1 +1,2 @@
 There is no crafting recipe as this should only be available for server admins. Quite similar to the Minecraft counterpart. Executes server commands.
+It works in inactive blocks.

mesecons_commandblock/init.lua

@@ -181,6 +181,7 @@ minetest.register_node("mesecons_commandblock:commandblock_off", {
 	description = "Command Block",
 	tiles = {"jeija_commandblock_off.png"},
 	inventory_image = minetest.inventorycube("jeija_commandblock_off.png"),
+	is_ground_content = false,
 	groups = {cracky=2, mesecon_effector_off=1},
 	on_construct = construct,
 	after_place_node = after_place,
@@ -189,11 +190,13 @@ minetest.register_node("mesecons_commandblock:commandblock_off", {
 	sounds = default.node_sound_stone_defaults(),
 	mesecons = {effector = {
 		action_on = commandblock_action_on
-	}}
+	}},
+	on_blast = mesecon.on_blastnode,
 })
 
 minetest.register_node("mesecons_commandblock:commandblock_on", {
 	tiles = {"jeija_commandblock_on.png"},
+	is_ground_content = false,
 	groups = {cracky=2, mesecon_effector_on=1, not_in_creative_inventory=1},
 	light_source = 10,
 	drop = "mesecons_commandblock:commandblock_off",
@@ -204,5 +207,6 @@ minetest.register_node("mesecons_commandblock:commandblock_on", {
 	sounds = default.node_sound_stone_defaults(),
 	mesecons = {effector = {
 		action_off = commandblock_action_off
-	}}
+	}},
+	on_blast = mesecon.on_blastnode,
 })

mesecons_delayer/doc/delayer/description.html

@@ -1 +1 @@
-The delayer delays the signal from the input for a determined time. The time can be set by punching the delayer. Possible delays are: 0.1 seconds, 0.3 seconds, 0.5 seconds and 1 second. You may try to use it for creating songs with the noteblock.
+The delayer delays the signal from the input for a determined time. The time can be set by punching the delayer. Possible delays are: 0.1 seconds, 0.3 seconds, 0.5 seconds and 1 second. You may try to use it for creating songs with the noteblock. It works in unloaded blocks.

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",
@@ -85,7 +87,7 @@ minetest.register_node("mesecons_delayer:delayer_off_"..tostring(i), {
 	paramtype = "light",
 	paramtype2 = "facedir",
 	sunlight_propagates = true,
-	is_ground_content = true,
+	is_ground_content = false,
 	drop = 'mesecons_delayer:delayer_off_1',
 	on_punch = function (pos, node)
 		if node.name=="mesecons_delayer:delayer_off_1" then
@@ -112,7 +114,8 @@ minetest.register_node("mesecons_delayer:delayer_off_"..tostring(i), {
 			rules = delayer_get_input_rules,
 			action_on = delayer_activate
 		}
-	}
+	},
+	on_blast = mesecon.on_blastnode,
 })
 
 
@@ -140,7 +143,7 @@ minetest.register_node("mesecons_delayer:delayer_on_"..tostring(i), {
 	paramtype = "light",
 	paramtype2 = "facedir",
 	sunlight_propagates = true,
-	is_ground_content = true,
+	is_ground_content = false,
 	drop = 'mesecons_delayer:delayer_off_1',
 	on_punch = function (pos, node)
 		if node.name=="mesecons_delayer:delayer_on_1" then
@@ -155,6 +158,7 @@ minetest.register_node("mesecons_delayer:delayer_on_"..tostring(i), {
 	end,
 	delayer_time = delaytime,
 	delayer_offstate = "mesecons_delayer:delayer_off_"..tostring(i),
+	sounds = default.node_sound_stone_defaults(),
 	mesecons = {
 		receptor =
 		{
@@ -166,7 +170,8 @@ minetest.register_node("mesecons_delayer:delayer_on_"..tostring(i), {
 			rules = delayer_get_input_rules,
 			action_off = delayer_deactivate
 		}
-	}
+	},
+	on_blast = mesecon.on_blastnode,
 })
 end
 

mesecons_detector/doc/nodedetector/description.html

@@ -4,3 +4,5 @@ It can also receive digiline signals. You can either send "GET" and it will
 respond with the detected nodename or you can send any other string and it will
 set this string as the node to scan for.
 Nodenames must include the mod they reside in, so for instance default:dirt, not just dirt.
+The distance parameter specifies how many blocks are between the node detector and the node to detect.
+Automatic scanning with Mesecons output only works when the detector is in an active block, but Digilines queries always work.

mesecons_detector/doc/objectdetector/description.html

@@ -1,3 +1,5 @@
 The object detector is a receptor. It changes its state when a player approaches.
 Right-click it to set a name to scan for.
+You can also search for comma-separated lists of players where the detector gets activated if any of the names in the list are found.
 It can also receive digiline signals which are the name to scan for on the specified channel in the right-click menu.
+Automatic scanning with Mesecons output only works when the detector is in an active block, but Digilines queries always work.

mesecons_detector/init.lua

@@ -5,15 +5,18 @@ local GET_COMMAND = "GET"
 -- The radius can be specified in mesecons/settings.lua
 
 local function object_detector_make_formspec(pos)
-	minetest.get_meta(pos):set_string("formspec", "size[9,2.5]" ..
+	local meta = minetest.get_meta(pos)
+	meta:set_string("formspec", "size[9,2.5]" ..
 		"field[0.3,  0;9,2;scanname;Name of player 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 function object_detector_on_receive_fields(pos, _, fields)
+local function object_detector_on_receive_fields(pos, formname, fields, sender)
 	if not fields.scanname or not fields.digiline_channel then return end
 
+	if minetest.is_protected(pos, sender:get_player_name()) then return end
+
 	local meta = minetest.get_meta(pos)
 	meta:set_string("scanname", fields.scanname)
 	meta:set_string("digiline_channel", fields.digiline_channel)
@@ -28,14 +31,17 @@ local function object_detector_scan(pos)
 	if next(objs) == nil then return false end
 
 	local scanname = minetest.get_meta(pos):get_string("scanname")
+	local scan_for = {}
+	for _, str in pairs(string.split(scanname:gsub(" ", ""), ",")) do
+		scan_for[str] = true
+	end
+
 	local every_player = scanname == ""
 	for _, obj in pairs(objs) do
 		-- "" is returned if it is not a player; "" ~= nil; so only handle objects with foundname ~= ""
 		local foundname = obj:get_player_name()
-
 		if foundname ~= "" then
-			-- return true if scanning for any player or if specific playername was detected
-			if scanname == "" or foundname == scanname then
+			if every_player or scan_for[foundname] then
 				return true
 			end
 		end
@@ -60,6 +66,7 @@ local object_detector_digiline = {
 minetest.register_node("mesecons_detector:object_detector_off", {
 	tiles = {"default_steel_block.png", "default_steel_block.png", "jeija_object_detector_off.png", "jeija_object_detector_off.png", "jeija_object_detector_off.png", "jeija_object_detector_off.png"},
 	paramtype = "light",
+	is_ground_content = false,
 	walkable = true,
 	groups = {cracky=3},
 	description="Player Detector",
@@ -70,12 +77,14 @@ minetest.register_node("mesecons_detector:object_detector_off", {
 	on_construct = object_detector_make_formspec,
 	on_receive_fields = object_detector_on_receive_fields,
 	sounds = default.node_sound_stone_defaults(),
-	digiline = object_detector_digiline
+	digiline = object_detector_digiline,
+	on_blast = mesecon.on_blastnode,
 })
 
 minetest.register_node("mesecons_detector:object_detector_on", {
 	tiles = {"default_steel_block.png", "default_steel_block.png", "jeija_object_detector_on.png", "jeija_object_detector_on.png", "jeija_object_detector_on.png", "jeija_object_detector_on.png"},
 	paramtype = "light",
+	is_ground_content = false,
 	walkable = true,
 	groups = {cracky=3,not_in_creative_inventory=1},
 	drop = 'mesecons_detector:object_detector_off',
@@ -86,7 +95,8 @@ minetest.register_node("mesecons_detector:object_detector_on", {
 	on_construct = object_detector_make_formspec,
 	on_receive_fields = object_detector_on_receive_fields,
 	sounds = default.node_sound_stone_defaults(),
-	digiline = object_detector_digiline
+	digiline = object_detector_digiline,
+	on_blast = mesecon.on_blastnode,
 })
 
 minetest.register_craft({
@@ -98,6 +108,15 @@ minetest.register_craft({
 	}
 })
 
+minetest.register_craft({
+	output = 'mesecons_detector:object_detector_off',
+	recipe = {
+		{"default:steel_ingot", "default:steel_ingot", "default:steel_ingot"},
+		{"default:steel_ingot", "mesecons_microcontroller:microcontroller0000", "default:steel_ingot"},
+		{"default:steel_ingot", "group:mesecon_conductor_craftable", "default:steel_ingot"},
+	}
+})
+
 minetest.register_abm({
 	nodenames = {"mesecons_detector:object_detector_off"},
 	interval = 1,
@@ -128,17 +147,23 @@ minetest.register_abm({
 -- Detects the node in front of it
 
 local function node_detector_make_formspec(pos)
-	minetest.get_meta(pos):set_string("formspec", "size[9,2.5]" ..
+	local meta = minetest.get_meta(pos)
+	if meta:get_string("distance") == ""  then meta:set_string("distance", "0") end
+	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}]"..
+		"field[0.3,1.5;2.5,2;distance;Distance (0-"..mesecon.setting("node_detector_distance_max", 10).."):;${distance}]"..
+		"field[3,1.5;4,2;digiline_channel;Digiline Channel (optional):;${digiline_channel}]"..
 		"button_exit[7,0.75;2,3;;Save]")
 end
 
-local function node_detector_on_receive_fields(pos, _, fields)
+local function node_detector_on_receive_fields(pos, fieldname, fields, sender)
 	if not fields.scanname or not fields.digiline_channel then return end
 
+	if minetest.is_protected(pos, sender:get_player_name()) then return end
+
 	local meta = minetest.get_meta(pos)
 	meta:set_string("scanname", fields.scanname)
+	meta:set_string("distance", fields.distance or "0")
 	meta:set_string("digiline_channel", fields.digiline_channel)
 	node_detector_make_formspec(pos)
 end
@@ -148,10 +173,17 @@ local function node_detector_scan(pos)
 	local node = minetest.get_node_or_nil(pos)
 	if not node then return end
 
+	local meta = minetest.get_meta(pos)
+
+	local distance = meta:get_int("distance")
+	local distance_max = mesecon.setting("node_detector_distance_max", 10)
+	if distance < 0 then distance = 0 end
+	if distance > distance_max then distance = distance_max end
+
 	local frontname = minetest.get_node(
-		vector.subtract(pos, minetest.facedir_to_dir(node.param2))
+		vector.subtract(pos, vector.multiply(minetest.facedir_to_dir(node.param2), distance + 1))
 	).name
-	local scanname = minetest.get_meta(pos):get_string("scanname")
+	local scanname = meta:get_string("scanname")
 
 	return (frontname == scanname) or
 		(frontname ~= "air" and frontname ~= "ignore" and scanname == "")
@@ -162,11 +194,17 @@ local node_detector_digiline = {
 	effector = {
 		action = function(pos, node, channel, msg)
 			local meta = minetest.get_meta(pos)
+
+			local distance = meta:get_int("distance")
+			local distance_max = mesecon.setting("node_detector_distance_max", 10)
+			if distance < 0 then distance = 0 end
+			if distance > distance_max then distance = distance_max end
+
 			if channel ~= meta:get_string("digiline_channel") then return end
 
 			if msg == GET_COMMAND then
 				local nodename = minetest.get_node(
-					vector.subtract(pos, minetest.facedir_to_dir(node.param2))
+					vector.subtract(pos, vector.multiply(minetest.facedir_to_dir(node.param2), distance + 1))
 				).name
 
 				digiline:receptor_send(pos, digiline.rules.default, channel, nodename)
@@ -200,6 +238,7 @@ 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",
 	paramtype2 = "facedir",
+	is_ground_content = false,
 	walkable = true,
 	groups = {cracky=3},
 	description="Node Detector",
@@ -208,15 +247,16 @@ 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 = after_place_node_detector,
 	sounds = default.node_sound_stone_defaults(),
-	digiline = node_detector_digiline
+	digiline = node_detector_digiline,
+	on_blast = mesecon.on_blastnode,
 })
 
 minetest.register_node("mesecons_detector:node_detector_on", {
 	tiles = {"default_steel_block.png", "default_steel_block.png", "default_steel_block.png", "default_steel_block.png", "default_steel_block.png", "jeija_node_detector_on.png"},
 	paramtype = "light",
 	paramtype2 = "facedir",
+	is_ground_content = false,
 	walkable = true,
 	groups = {cracky=3,not_in_creative_inventory=1},
 	drop = 'mesecons_detector:node_detector_off',
@@ -225,9 +265,9 @@ 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 = after_place_node_detector,
 	sounds = default.node_sound_stone_defaults(),
-	digiline = node_detector_digiline
+	digiline = node_detector_digiline,
+	on_blast = mesecon.on_blastnode,
 })
 
 minetest.register_craft({
@@ -239,6 +279,15 @@ minetest.register_craft({
 	}
 })
 
+minetest.register_craft({
+	output = 'mesecons_detector:node_detector_off',
+	recipe = {
+		{"default:steel_ingot", "group:mesecon_conductor_craftable", "default:steel_ingot"},
+		{"default:steel_ingot", "mesecons_microcontroller:microcontroller0000", "default:steel_ingot"},
+		{"default:steel_ingot", "default:steel_ingot", "default:steel_ingot"},
+	}
+})
+
 minetest.register_abm({
 	nodenames = {"mesecons_detector:node_detector_off"},
 	interval = 1,

mesecons_extrawires/corner.lua

@@ -1,12 +1,15 @@
+local screwdriver_exists = minetest.global_exists("screwdriver")
+
 local corner_nodebox = {
 	type = "fixed",
+	-- ±0.001 is to prevent z-fighting
 	fixed = {{ -16/32-0.001, -17/32, -3/32, 0, -13/32, 3/32 },
 		   { -3/32, -17/32, -16/32+0.001, 3/32, -13/32, 3/32}}
 }
 
 local corner_selectionbox = {
 		type = "fixed",
-		fixed = { -16/32-0.001, -18/32, -16/32, 5/32, -12/32, 5/32 },
+		fixed = { -16/32, -16/32, -16/32, 5/32, -12/32, 5/32 },
 }
 
 local corner_get_rules = function (node)
@@ -33,23 +36,27 @@ minetest.register_node("mesecons_extrawires:corner_on", {
 	},
 	paramtype = "light",
 	paramtype2 = "facedir",
+	is_ground_content = false,
 	walkable = false,
 	sunlight_propagates = true,
 	selection_box = corner_selectionbox,
 	node_box = corner_nodebox,
 	groups = {dig_immediate = 3, not_in_creative_inventory = 1},
 	drop = "mesecons_extrawires:corner_off",
+	sounds = default.node_sound_defaults(),
 	mesecons = {conductor =
 	{
 		state = mesecon.state.on,
 		rules = corner_get_rules,
 		offstate = "mesecons_extrawires:corner_off"
-	}}
+	}},
+	on_blast = mesecon.on_blastnode,
+	on_rotate = screwdriver_exists and screwdriver.rotate_simple,
 })
 
 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",
@@ -60,17 +67,21 @@ minetest.register_node("mesecons_extrawires:corner_off", {
 	},
 	paramtype = "light",
 	paramtype2 = "facedir",
+	is_ground_content = false,
 	walkable = false,
 	sunlight_propagates = true,
 	selection_box = corner_selectionbox,
 	node_box = corner_nodebox,
 	groups = {dig_immediate = 3},
+	sounds = default.node_sound_defaults(),
 	mesecons = {conductor =
 	{
 		state = mesecon.state.off,
 		rules = corner_get_rules,
 		onstate = "mesecons_extrawires:corner_on"
-	}}
+	}},
+	on_blast = mesecon.on_blastnode,
+	on_rotate = screwdriver_exists and screwdriver.rotate_simple,
 })
 
 minetest.register_craft({

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},
@@ -19,143 +19,110 @@ local crossover_states = {
 }
 
 minetest.register_node("mesecons_extrawires:crossover_off", {
-	description = "Insulated Crossover",
-	drawtype = "nodebox",
+	description = "Insulated Mesecon Crossover",
+	drawtype = "mesh",
+	mesh = "mesecons_extrawires_crossover.b3d",
 	tiles = {
-		"jeija_insulated_wire_crossing_tb_off.png",
-		"jeija_insulated_wire_crossing_tb_off.png",
+		"jeija_insulated_wire_ends_off.png",
+		"jeija_insulated_wire_sides_off.png",
+		"jeija_insulated_wire_sides_off.png",
 		"jeija_insulated_wire_ends_off.png"
 	},
 	paramtype = "light",
+	is_ground_content = false,
 	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 },
-		},
-	},
+	selection_box = {type="fixed", fixed={-16/32, -16/32, -16/32, 16/32, -5/32, 16/32}},
 	groups = {dig_immediate=3, mesecon=3},
+	sounds = default.node_sound_defaults(),
 	mesecons = {
 		conductor = {
 			states = crossover_states,
 			rules = crossover_get_rules(),
 		}
 	},
+	on_blast = mesecon.on_blastnode,
 })
 
 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_crossing_tb_01.png",
-		"jeija_insulated_wire_ends_01x.png",
-		"jeija_insulated_wire_ends_01x.png",
-		"jeija_insulated_wire_ends_01z.png",
-		"jeija_insulated_wire_ends_01z.png"
+		"jeija_insulated_wire_ends_on.png",
+		"jeija_insulated_wire_sides_on.png",
+		"jeija_insulated_wire_sides_off.png",
+		"jeija_insulated_wire_ends_off.png"
 	},
 	paramtype = "light",
+	is_ground_content = false,
 	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 },
-		},
-	},
+	selection_box = {type="fixed", fixed={-16/32, -16/32, -16/32, 16/32, -5/32, 16/32}},
 	groups = {dig_immediate=3, mesecon=3, not_in_creative_inventory=1},
+	sounds = default.node_sound_defaults(),
 	mesecons = {
 		conductor = {
 			states = crossover_states,
 			rules = crossover_get_rules(),
 		}
 	},
+	on_blast = mesecon.on_blastnode,
 })
 
 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_crossing_tb_10.png",
-		"jeija_insulated_wire_ends_10x.png",
-		"jeija_insulated_wire_ends_10x.png",
-		"jeija_insulated_wire_ends_10z.png",
-		"jeija_insulated_wire_ends_10z.png"
+		"jeija_insulated_wire_ends_off.png",
+		"jeija_insulated_wire_sides_off.png",
+		"jeija_insulated_wire_sides_on.png",
+		"jeija_insulated_wire_ends_on.png"
 	},
 	paramtype = "light",
+	is_ground_content = false,
 	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 },
-		},
-	},
+	selection_box = {type="fixed", fixed={-16/32, -16/32, -16/32, 16/32, -5/32, 16/32}},
 	groups = {dig_immediate=3, mesecon=3, not_in_creative_inventory=1},
+	sounds = default.node_sound_defaults(),
 	mesecons = {
 		conductor = {
 			states = crossover_states,
 			rules = crossover_get_rules(),
 		}
 	},
+	on_blast = mesecon.on_blastnode,
 })
 
 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",
+	is_ground_content = false,
 	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 },
-		},
-	},
+	selection_box = {type="fixed", fixed={-16/32, -16/32, -16/32, 16/32, -5/32, 16/32}},
 	groups = {dig_immediate=3, mesecon=3, not_in_creative_inventory=1},
+	sounds = default.node_sound_defaults(),
 	mesecons = {
 		conductor = {
 			states = crossover_states,
 			rules = crossover_get_rules(),
 		}
 	},
+	on_blast = mesecon.on_blastnode,
 })
 
 minetest.register_craft({

mesecons_extrawires/depends.txt

@@ -1,2 +1,3 @@
 default
 mesecons
+screwdriver?

mesecons_extrawires/doc/corner/description.html

@@ -1 +1 @@
-Insulated corners are conductors that only conduct between the inputs (also not up or down). When placing they always point to the left in direction of your vision.
+Insulated corners are conductors that only conduct between the inputs (also not up or down). When placing they always point to the left in direction of your vision. Like uninsulated wires, they work through unloaded blocks.

mesecons_extrawires/doc/crossing/description.html

@@ -1 +1 @@
-Insulated crossing are conductors that conduct two signals between the opposing sides, the signals are insulated to each other.
+Insulated crossing are conductors that conduct two signals between the opposing sides, the signals are insulated to each other. Like uninsulated wires, they work through unloaded blocks.

mesecons_extrawires/doc/mese/description.html

@@ -1 +1 @@
-The basic prerequesite for mesecons, can be crafted into wires and other stuff. Have a look at the <a href="http://wiki.minetest.net/Mese">Minetest Wiki</a> for more information. Mese is a conductor. It conducts in all six directions: Up/Down/Left/Right/Forward/Backward
+The basic prerequesite for mesecons, can be crafted into wires and other stuff. Have a look at the <a href="http://wiki.minetest.net/Mese">Minetest Wiki</a> for more information. Mese is a conductor. It conducts in all six directions: Up/Down/Left/Right/Forward/Backward. Like horizontal wires, Mese conduction works through unloaded blocks.

mesecons_extrawires/doc/tjunction/description.html

@@ -1 +1 @@
-Insulated T-Junctions are conductors that only conduct between the inputs (also not up or down).
+Insulated T-Junctions are conductors that only conduct between the inputs (also not up or down). Like uninsulated wires, they work through unloaded blocks.

mesecons_extrawires/doc/vertical/description.html

@@ -1 +1 @@
-Vertical Mesecons only conduct up and down. Plates appear at the ends, at that place they also conduct to the side.
+Vertical Mesecons only conduct up and down. Plates appear at the ends, at that place they also conduct to the side. Like horizontal wires, they work through unloaded blocks.

mesecons_extrawires/mesewire.lua

@@ -26,7 +26,8 @@ local powered_def = mesecon.mergetable(minetest.registered_nodes["default:mese"]
 		offstate = "default:mese",
 		rules = mesewire_rules
 	}},
-	groups = {cracky = 1, not_in_creative_inventory = 1}
+	groups = {cracky = 1, not_in_creative_inventory = 1},
+	on_blast = mesecon.on_blastnode,
 })
 
 for i, v in pairs(powered_def.tiles) do

mesecons_extrawires/tjunction.lua

@@ -1,12 +1,15 @@
+local screwdriver_exists = minetest.global_exists("screwdriver")
+
 local tjunction_nodebox = {
 	type = "fixed",
+	-- ±0.001 is to prevent z-fighting
 	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, -3/32},}
 }
 
 local tjunction_selectionbox = {
 		type = "fixed",
-		fixed = { -16/32-0.001, -18/32, -16/32, 16/32+0.001, -12/32, 7/32 },
+		fixed = { -16/32, -16/32, -16/32, 16/32, -12/32, 7/32 },
 }
 
 local tjunction_get_rules = function (node)
@@ -34,23 +37,27 @@ minetest.register_node("mesecons_extrawires:tjunction_on", {
 	},
 	paramtype = "light",
 	paramtype2 = "facedir",
+	is_ground_content = false,
 	walkable = false,
 	sunlight_propagates = true,
 	selection_box = tjunction_selectionbox,
 	node_box = tjunction_nodebox,
 	groups = {dig_immediate = 3, not_in_creative_inventory = 1},
 	drop = "mesecons_extrawires:tjunction_off",
+	sounds = default.node_sound_defaults(),
 	mesecons = {conductor =
 	{
 		state = mesecon.state.on,
 		rules = tjunction_get_rules,
 		offstate = "mesecons_extrawires:tjunction_off"
-	}}
+	}},
+	on_blast = mesecon.on_blastnode,
+	on_rotate = screwdriver_exists and screwdriver.rotate_simple,
 })
 
 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",
@@ -61,17 +68,21 @@ minetest.register_node("mesecons_extrawires:tjunction_off", {
 	},
 	paramtype = "light",
 	paramtype2 = "facedir",
+	is_ground_content = false,
 	walkable = false,
 	sunlight_propagates = true,
 	selection_box = tjunction_selectionbox,
 	node_box = tjunction_nodebox,
 	groups = {dig_immediate = 3},
+	sounds = default.node_sound_defaults(),
 	mesecons = {conductor =
 	{
 		state = mesecon.state.off,
 		rules = tjunction_get_rules,
 		onstate = "mesecons_extrawires:tjunction_on"
-	}}
+	}},
+	on_blast = mesecon.on_blastnode,
+	on_rotate = screwdriver_exists and screwdriver.rotate_simple,
 })
 
 minetest.register_craft({

mesecons_extrawires/vertical.lua

@@ -77,17 +77,19 @@ end
 
 -- Vertical wire
 mesecon.register_node("mesecons_extrawires:vertical", {
-	description = "Vertical mesecon",
+	description = "Vertical Mesecon",
 	drawtype = "nodebox",
 	walkable = false,
 	paramtype = "light",
+	is_ground_content = false,
 	sunlight_propagates = true,
 	selection_box = vertical_box,
 	node_box = vertical_box,
 	is_vertical_conductor = true,
 	drop = "mesecons_extrawires:vertical_off",
 	after_place_node = vertical_update,
-	after_dig_node = vertical_update
+	after_dig_node = vertical_update,
+	sounds = default.node_sound_defaults(),
 },{
 	tiles = {"mesecons_wire_off.png"},
 	groups = {dig_immediate=3},
@@ -112,6 +114,7 @@ mesecon.register_node("mesecons_extrawires:vertical_top", {
 	drawtype = "nodebox",
 	walkable = false,
 	paramtype = "light",
+	is_ground_content = false,
 	sunlight_propagates = true,
 	groups = {dig_immediate=3, not_in_creative_inventory=1},
 	selection_box = top_box,
@@ -119,7 +122,8 @@ mesecon.register_node("mesecons_extrawires:vertical_top", {
 	is_vertical_conductor = true,
 	drop = "mesecons_extrawires:vertical_off",
 	after_place_node = vertical_update,
-	after_dig_node = vertical_update
+	after_dig_node = vertical_update,
+	sounds = default.node_sound_defaults(),
 },{
 	tiles = {"mesecons_wire_off.png"},
 	mesecons = {conductor = {
@@ -142,6 +146,7 @@ mesecon.register_node("mesecons_extrawires:vertical_bottom", {
 	drawtype = "nodebox",
 	walkable = false,
 	paramtype = "light",
+	is_ground_content = false,
 	sunlight_propagates = true,
 	groups = {dig_immediate = 3, not_in_creative_inventory = 1},
 	selection_box = bottom_box,
@@ -149,7 +154,8 @@ mesecon.register_node("mesecons_extrawires:vertical_bottom", {
 	is_vertical_conductor = true,
 	drop = "mesecons_extrawires:vertical_off",
 	after_place_node = vertical_update,
-	after_dig_node = vertical_update
+	after_dig_node = vertical_update,
+	sounds = default.node_sound_defaults(),
 },{
 	tiles = {"mesecons_wire_off.png"},
 	mesecons = {conductor = {

mesecons_fpga/depends.txt

@@ -0,0 +1,2 @@
+mesecons
+screwdriver?

mesecons_fpga/doc/fpga/description.html

@@ -0,0 +1,6 @@
+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 each other to form logic circuits.
+They work fine in unloaded blocks.<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 +1,420 @@
+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
+	is_ground_content = false,
+	sunlight_propagates = true,
+	paramtype = "light",
+	walkable = true,
+	groups = {dig_immediate = 2, mesecon = 3, overheat = 1},
+	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,
+	on_blast = mesecon.on_blastnode,
+	on_rotate = function(pos, node, user, mode)
+		local abcd1 = {"A", "B", "C", "D"}
+		local abcd2 = {A = 1, B = 2, C = 3, D = 4}
+		local ops = {"op1", "op2", "dst"}
+		local dir = 0
+		if mode == screwdriver.ROTATE_FACE then -- clock-wise
+			dir = 1
+			if user and user:is_player() then
+				minetest.chat_send_player(user:get_player_name(),
+						"FPGA ports have been rotated clockwise.")
+			end
+		elseif mode == screwdriver.ROTATE_AXIS then -- counter-clockwise
+			dir = -1
+			if user and user:is_player() then
+				minetest.chat_send_player(user:get_player_name(),
+						"FPGA ports have been rotated counter-clockwise.")
+			end
+		end
+
+		local meta = minetest.get_meta(pos)
+		local instr = lcore.deserialize(meta:get_string("instr"))
+		for i = 1, #instr do
+			for _, op in ipairs(ops) do
+				local o = instr[i][op]
+				if o and o.type == "io" then
+					local num = abcd2[o.port]
+					num = num + dir
+					if num > 4 then num = 1
+					elseif num < 1 then num = 4 end
+					instr[i][op].port = abcd1[num]
+				end
+			end
+		end
+
+		meta:set_string("instr", lcore.serialize(instr))
+		plg.update_formspec(pos, instr)
+		return true
+	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
+	elseif mesecon.do_overheat(pos) then
+		plg.setports(pos, false, false, false, false)
+		meta:set_int("valid", 0)
+		meta:set_string("infotext", "FPGA (overheated)")
+		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/doc/and/description.html

@@ -1 +1,2 @@
-And gates power their output if both inputs (from left and right) are powered.
+AND gates power their output if both inputs (from left and right) are powered.
+They work in unloaded blocks.

mesecons_gates/doc/diode/description.html

@@ -1 +1,2 @@
-Mesecon diodes, just like real ones, only transfer power (signals) in one direction only.
+Diodes conduct signals in one direction only.
+They work in unloaded blocks.

mesecons_gates/doc/nand/description.html

@@ -1 +1,2 @@
-Nand gates do not power their output if both inputs (from left and right) are powered, but power it in every other case.
+NAND gates do not power their output if both inputs (from left and right) are powered, but power it in every other case.
+They work in unloaded blocks.

mesecons_gates/doc/nor/description.html

@@ -1 +1,2 @@
-Nor gates only power their output if none of their two inputs is powered. They are basically or gates with a not gate at their output.
+NOR gates only power their output if none of their two inputs is powered. They are basically OR gates with a NOT gate at their output.
+They work in unloaded blocks.

mesecons_gates/doc/not/description.html

@@ -1 +1,2 @@
-Not gates invert signals, just like a mesecon torch does, but faster. The input is at the opposite side of the output.
+NOT gates invert signals, just like a mesecon torch does, but faster. The input is at the opposite side of the output.
+They work in unloaded blocks.

mesecons_gates/doc/or/description.html

@@ -1 +1,2 @@
-Or gates power their output if either of their inputs (or both) are powered. You could basically get the same behaviour with two diodes, but or gates save some space.
+OR gates power their output if either of their inputs (or both) are powered. You could basically get the same behaviour with two diodes, but OR gates save some space.
+They work in unloaded blocks.

mesecons_gates/doc/xor/description.html

@@ -1 +1,2 @@
 XOR gates power their output if only one input is powered, they're off if either both or none of the inputs is powered.
+They work in unloaded blocks.

mesecons_gates/init.lua

@@ -54,10 +54,10 @@ 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, description)
 	local get_inputrules = inputnumber == 2 and gate_get_input_rules_twoinputs or
 		gate_get_input_rules_oneinput
-	local description = "Mesecons Logic Gate: "..name
+	description = "Logic Gate: "..name
 
 	local basename = "mesecons_gates:"..name
 	mesecon.register_node(basename, {
@@ -65,6 +65,7 @@ function register_gate(name, inputnumber, assess, recipe)
 		inventory_image = "jeija_gate_off.png^jeija_gate_"..name..".png",
 		paramtype = "light",
 		paramtype2 = "facedir",
+		is_ground_content = false,
 		drawtype = "nodebox",
 		drop = basename.."_off",
 		selection_box = nodebox,
@@ -74,7 +75,8 @@ function register_gate(name, inputnumber, assess, recipe)
 		assess = assess,
 		onstate = basename.."_on",
 		offstate = basename.."_off",
-		inputnumber = inputnumber
+		inputnumber = inputnumber,
+		after_dig_node = mesecon.do_cooldown,
 	},{
 		tiles = {"jeija_microcontroller_bottom.png^".."jeija_gate_off.png^"..
 			"jeija_gate_"..name..".png"},
@@ -103,32 +105,39 @@ function register_gate(name, inputnumber, assess, recipe)
 end
 
 register_gate("diode", 1, function (input) return input end,
-	{{"mesecons:mesecon", "mesecons_torch:mesecon_torch_on", "mesecons_torch:mesecon_torch_on"}})
+	{{"mesecons:mesecon", "mesecons_torch:mesecon_torch_on", "mesecons_torch:mesecon_torch_on"}},
+	"Diode")
 
 register_gate("not", 1, function (input) return not input end,
-	{{"mesecons:mesecon", "mesecons_torch:mesecon_torch_on", "mesecons:mesecon"}})
+	{{"mesecons:mesecon", "mesecons_torch:mesecon_torch_on", "mesecons:mesecon"}},
+	"NOT Gate")
 
 register_gate("and", 2, function (val1, val2) return val1 and val2 end,
 	{{"mesecons:mesecon", "", ""},
 	 {"", "mesecons_materials:silicon", "mesecons:mesecon"},
-	 {"mesecons:mesecon", "", ""}})
+	 {"mesecons:mesecon", "", ""}},
+	"AND Gate")
 
 register_gate("nand", 2, function (val1, val2) return not (val1 and val2) end,
 	{{"mesecons:mesecon", "", ""},
 	 {"", "mesecons_materials:silicon", "mesecons_torch:mesecon_torch_on"},
-	 {"mesecons:mesecon", "", ""}})
+	 {"mesecons:mesecon", "", ""}},
+	"NAND Gate")
 
 register_gate("xor", 2, function (val1, val2) return (val1 or val2) and not (val1 and val2) end,
 	{{"mesecons:mesecon", "", ""},
 	 {"", "mesecons_materials:silicon", "mesecons_materials:silicon"},
-	 {"mesecons:mesecon", "", ""}})
+	 {"mesecons:mesecon", "", ""}},
+	"XOR Gate")
 
 register_gate("nor", 2, function (val1, val2) return not (val1 or val2) end,
 	{{"mesecons:mesecon", "", ""},
 	 {"", "mesecons:mesecon", "mesecons_torch:mesecon_torch_on"},
-	 {"mesecons:mesecon", "", ""}})
+	 {"mesecons:mesecon", "", ""}},
+	"NOR Gate")
 
 register_gate("or", 2, function (val1, val2) return (val1 or val2) end,
 	{{"mesecons:mesecon", "", ""},
 	 {"", "mesecons:mesecon", "mesecons:mesecon"},
-	 {"mesecons:mesecon", "", ""}})
+	 {"mesecons:mesecon", "", ""}},
+	"OR Gate")

mesecons_hydroturbine/doc/waterturbine/description.html

@@ -1 +1,2 @@
 Water turbines are receptors that turn on if flowing water is above them.
+They only work in active blocks; in inactive blocks they keep their old state.

mesecons_hydroturbine/init.lua

@@ -5,14 +5,15 @@
 
 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_misc.png"
+		"jeija_hydro_turbine_turbine_top_bottom_off.png",
+		"jeija_hydro_turbine_turbine_misc_off.png"
 	},
 	inventory_image = "jeija_hydro_turbine_inv.png",
+	is_ground_content = false,
 	wield_scale = {x=0.75, y=0.75, z=0.75},
 	groups = {dig_immediate=2},
 	description="Water Turbine",
@@ -21,21 +22,25 @@ minetest.register_node("mesecons_hydroturbine:hydro_turbine_off", {
 		type = "fixed",
 		fixed = { -0.5, -0.5, -0.5, 0.5, 1.5, 0.5 },
 	},
-	sounds = default.node_sound_stone_defaults(),
+	sounds = default.node_sound_metal_defaults(),
 	mesecons = {receptor = {
 		state = mesecon.state.off
-	}}
+	}},
+	on_blast = mesecon.on_blastnode,
 })
 
 minetest.register_node("mesecons_hydroturbine:hydro_turbine_on", {
 	drawtype = "mesh",
-	mesh = "jeija_hydro_turbine.obj",
+	is_ground_content = false,
+	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",
-		"jeija_hydro_turbine_turbine_misc.png"
+		{ name = "jeija_hydro_turbine_turbine_top_bottom_on.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",
@@ -46,22 +51,29 @@ minetest.register_node("mesecons_hydroturbine:hydro_turbine_on", {
 		type = "fixed",
 		fixed = { -0.5, -0.5, -0.5, 0.5, 1.5, 0.5 },
 	},
-	sounds = default.node_sound_stone_defaults(),
+	sounds = default.node_sound_metal_defaults(),
 	mesecons = {receptor = {
 		state = mesecon.state.on
-	}}
+	}},
+	on_blast = mesecon.on_blastnode,
 })
 
 
+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)
 		end
 	end,
@@ -73,9 +85,8 @@ 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)
 		end
 	end,

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 1.500000 -0.490393
-v -0.277785 1.500000 -0.415735
-v -0.415735 1.500000 -0.277785
-v -0.490393 1.500000 -0.097545
-v -0.490393 1.500000 0.097545
-v -0.415735 1.500000 0.277785
-v -0.277785 1.500000 0.415735
-v -0.097545 1.500000 0.490393
-v 0.097545 1.500000 0.490393
-v 0.277785 1.500000 0.415735
-v 0.415735 1.500000 0.277785
-v 0.490393 1.500000 0.097545
-v 0.490393 1.500000 -0.097545
-v 0.415735 1.500000 -0.277785
-v 0.277785 1.500000 -0.415735
-v 0.097545 1.468750 -0.490393
-v -0.097545 1.468750 -0.490393
-v -0.277785 1.468750 -0.415735
-v -0.415735 1.468750 -0.277785
-v -0.490393 1.468750 -0.097545
-v -0.490393 1.468750 0.097545
-v -0.415735 1.468750 0.277785
-v -0.277785 1.468750 0.415735
-v -0.097545 1.468750 0.490393
-v 0.097545 1.468750 0.490393
-v 0.277785 1.468750 0.415735
-v 0.415735 1.468750 0.277785
-v 0.490393 1.468750 0.097545
-v 0.490393 1.468750 -0.097545
-v 0.415735 1.468750 -0.277785
-v 0.277785 1.468750 -0.415735
+v 0.097545 1.496094 -0.490393
+v -0.097545 1.496094 -0.490393
+v -0.277785 1.496094 -0.415735
+v -0.415735 1.496094 -0.277785
+v -0.490393 1.496094 -0.097545
+v -0.490393 1.496094 0.097545
+v -0.415735 1.496094 0.277785
+v -0.277785 1.496094 0.415735
+v -0.097545 1.496094 0.490393
+v 0.097545 1.496094 0.490393
+v 0.277785 1.496094 0.415735
+v 0.415735 1.496094 0.277785
+v 0.490393 1.496094 0.097545
+v 0.490393 1.496094 -0.097545
+v 0.415735 1.496094 -0.277785
+v 0.277785 1.496094 -0.415735
+v 0.097545 1.464844 -0.490393
+v -0.097545 1.464844 -0.490393
+v -0.277785 1.464844 -0.415735
+v -0.415735 1.464844 -0.277785
+v -0.490393 1.464844 -0.097545
+v -0.490393 1.464844 0.097545
+v -0.415735 1.464844 0.277785
+v -0.277785 1.464844 0.415735
+v -0.097545 1.464844 0.490393
+v 0.097545 1.464844 0.490393
+v 0.277785 1.464844 0.415735
+v 0.415735 1.464844 0.277785
+v 0.490393 1.464844 0.097545
+v 0.490393 1.464844 -0.097545
+v 0.415735 1.464844 -0.277785
+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 0.499775 -0.499550 0.499775
-v -0.499775 -0.499550 0.499775
-v -0.499775 -0.499550 -0.499775
-v 0.499775 0.500000 -0.499775
-v 0.499775 0.500000 0.499775
-v -0.499775 0.500000 0.499775
-v -0.499775 0.500000 -0.499775
+v 0.496094 -0.496094 -0.496094
+v 0.496094 -0.496094 0.496094
+v -0.496094 -0.496094 0.496094
+v -0.496094 -0.496094 -0.496094
+v 0.496094 0.496094 -0.496094
+v 0.496094 0.496094 0.496094
+v -0.496094 0.496094 0.496094
+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 -1.000000 -0.000000 -0.000000
+vn 0.000000 0.000000 1.000000
+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/depends.txt

@@ -1 +1,2 @@
 mesecons
+screwdriver?

mesecons_insulated/doc/insulated/description.html

@@ -1 +1 @@
- Insulated mesecons are conductors that only conduct in one direction (and also not up or down).
+ Insulated mesecons are conductors that only conduct in one direction (and also not up or down). Like uninsulated wires, they work through unloaded blocks.

mesecons_insulated/init.lua

@@ -1,4 +1,6 @@
-function insulated_wire_get_rules(node)
+local screwdriver_exists = minetest.global_exists("screwdriver")
+
+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
@@ -9,7 +11,7 @@ end
 
 minetest.register_node("mesecons_insulated:insulated_on", {
 	drawtype = "nodebox",
-	description = "Insulated Mesecon",
+	description = "Straight Insulated Mesecon",
 	tiles = {
 		"jeija_insulated_wire_sides_on.png",
 		"jeija_insulated_wire_sides_on.png",
@@ -20,28 +22,33 @@ minetest.register_node("mesecons_insulated:insulated_on", {
 	},
 	paramtype = "light",
 	paramtype2 = "facedir",
+	is_ground_content = false,
 	walkable = false,
 	sunlight_propagates = true,
 	selection_box = {
 		type = "fixed",
-		fixed = { -16/32-0.001, -18/32, -7/32, 16/32+0.001, -12/32, 7/32 }
+		fixed = { -16/32, -16/32, -7/32, 16/32, -12/32, 7/32 }
 	},
 	node_box = {
 		type = "fixed",
+		-- ±0.001 is to prevent z-fighting
 		fixed = { -16/32-0.001, -17/32, -3/32, 16/32+0.001, -13/32, 3/32 }
 	},
 	groups = {dig_immediate = 3, not_in_creative_inventory = 1},
 	drop = "mesecons_insulated:insulated_off",
+	sounds = default.node_sound_defaults(),
 	mesecons = {conductor = {
 		state = mesecon.state.on,
 		offstate = "mesecons_insulated:insulated_off",
 		rules = insulated_wire_get_rules
-	}}
+	}},
+	on_blast = mesecon.on_blastnode,
+	on_rotate = screwdriver_exists and screwdriver.rotate_simple,
 })
 
 minetest.register_node("mesecons_insulated:insulated_off", {
 	drawtype = "nodebox",
-	description = "Insulated Mesecon",
+	description = "Straight Insulated Mesecon",
 	tiles = {
 		"jeija_insulated_wire_sides_off.png",
 		"jeija_insulated_wire_sides_off.png",
@@ -52,22 +59,27 @@ minetest.register_node("mesecons_insulated:insulated_off", {
 	},
 	paramtype = "light",
 	paramtype2 = "facedir",
+	is_ground_content = false,
 	walkable = false,
 	sunlight_propagates = true,
 	selection_box = {
 		type = "fixed",
-		fixed = { -16/32-0.001, -18/32, -7/32, 16/32+0.001, -12/32, 7/32 }
+		fixed = { -16/32, -16/32, -7/32, 16/32, -12/32, 7/32 }
 	},
 	node_box = {
 		type = "fixed",
+		-- ±0.001 is to prevent z-fighting
 		fixed = { -16/32-0.001, -17/32, -3/32, 16/32+0.001, -13/32, 3/32 }
 	},
 	groups = {dig_immediate = 3},
+	sounds = default.node_sound_defaults(),
 	mesecons = {conductor = {
 		state = mesecon.state.off,
 		onstate = "mesecons_insulated:insulated_on",
 		rules = insulated_wire_get_rules
-	}}
+	}},
+	on_blast = mesecon.on_blastnode,
+	on_rotate = screwdriver_exists and screwdriver.rotate_simple,
 })
 
 minetest.register_craft({

mesecons_lamp/doc/lamp/description.html

@@ -1 +1 @@
-Lamps are effectors that if powered emit light.
+Mesecon lamps are effectors that if powered emit light.

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},
@@ -14,20 +14,23 @@ minetest.register_node("mesecons_lamp:lamp_on", {
 	tiles = {"jeija_meselamp_on.png"},
 	paramtype = "light",
 	paramtype2 = "wallmounted",
+	is_ground_content = false,
 	legacy_wallmounted = true,
 	sunlight_propagates = true,
 	walkable = true,
-	light_source = default.LIGHT_MAX,
+	light_source = minetest.LIGHT_MAX,
 	node_box = mesecon_lamp_box,
 	selection_box = mesecon_lamp_box,
-	groups = {dig_immediate=3,not_in_creative_inventory=1, mesecon_effector_on = 1},
-	drop="mesecons_lamp:lamp_off 1",
+	groups = {dig_immediate = 3,not_in_creative_inventory = 1, mesecon_effector_on = 1},
+	drop = "mesecons_lamp:lamp_off 1",
 	sounds = default.node_sound_glass_defaults(),
 	mesecons = {effector = {
 		action_off = function (pos, node)
 			minetest.swap_node(pos, {name = "mesecons_lamp:lamp_off", param2 = node.param2})
-		end
-	}}
+		end,
+		rules = mesecon.rules.wallmounted_get,
+	}},
+	on_blast = mesecon.on_blastnode,
 })
 
 minetest.register_node("mesecons_lamp:lamp_off", {
@@ -37,18 +40,21 @@ minetest.register_node("mesecons_lamp:lamp_off", {
 	wield_image = "jeija_meselamp.png",
 	paramtype = "light",
 	paramtype2 = "wallmounted",
+	is_ground_content = false,
 	sunlight_propagates = true,
 	walkable = true,
 	node_box = mesecon_lamp_box,
 	selection_box = mesecon_lamp_box,
 	groups = {dig_immediate=3, mesecon_receptor_off = 1, mesecon_effector_off = 1},
-    	description="Meselamp",
+	description = "Mesecon Lamp",
 	sounds = default.node_sound_glass_defaults(),
 	mesecons = {effector = {
 		action_on = function (pos, node)
 			minetest.swap_node(pos, {name = "mesecons_lamp:lamp_on", param2 = node.param2})
-		end
-	}}
+		end,
+		rules = mesecon.rules.wallmounted_get,
+	}},
+	on_blast = mesecon.on_blastnode,
 })
 
 minetest.register_craft({

mesecons_lightstone/doc/lightstone_blue/description.html

@@ -1 +1,2 @@
 Effector, glows blue when powered.
+It works in an inactive block.

mesecons_lightstone/doc/lightstone_darkgrey/description.html

@@ -1 +1,2 @@
 Effector, glows dark grey when powered.
+It works in an inactive block.

mesecons_lightstone/doc/lightstone_green/description.html

@@ -1 +1,2 @@
 Effector, glows green when powered.
+It works in an inactive block.

mesecons_lightstone/doc/lightstone_lightgrey/description.html

@@ -1 +1,2 @@
 Effector, glows light grey when powered.
+It works in an inactive block.

mesecons_lightstone/doc/lightstone_red/description.html

@@ -1 +1,2 @@
 Effector, glows red when powered.
+It works in an inactive block.

mesecons_lightstone/doc/lightstone_yellow/description.html

@@ -1 +1,2 @@
 Effector, glows yellow when powered.
+It works in an inactive block.

mesecons_lightstone/init.lua

@@ -14,31 +14,38 @@ local lightstone_rules = {
 	{x=0,  y=-1, z=0},
 }
 
-function mesecon.lightstone_add(name, base_item, texture_off, texture_on)
+function mesecon.lightstone_add(name, base_item, texture_off, texture_on, desc)
+	if not desc then
+		desc = name .. " Lightstone"
+	end
 	minetest.register_node("mesecons_lightstone:lightstone_" .. name .. "_off", {
 		tiles = {texture_off},
-		groups = {cracky=2, mesecon_effector_off = 1, mesecon = 2},
-		description=name.." Lightstone",
+		is_ground_content = false,
+		groups = {cracky = 2, mesecon_effector_off = 1, mesecon = 2},
+		description = desc,
 		sounds = default.node_sound_stone_defaults(),
 		mesecons = {effector = {
 			rules = lightstone_rules,
 			action_on = function (pos, node)
 				minetest.swap_node(pos, {name = "mesecons_lightstone:lightstone_" .. name .. "_on", param2 = node.param2})
 			end,
-		}}
+		}},
+		on_blast = mesecon.on_blastnode,
 	})
 	minetest.register_node("mesecons_lightstone:lightstone_" .. name .. "_on", {
-	tiles = {texture_on},
-	groups = {cracky=2,not_in_creative_inventory=1, mesecon = 2},
-	drop = "mesecons_lightstone:lightstone_" .. name .. "_off",
-	light_source = default.LIGHT_MAX-2,
-	sounds = default.node_sound_stone_defaults(),
-	mesecons = {effector = {
-		rules = lightstone_rules,
-		action_off = function (pos, node)
-			minetest.swap_node(pos, {name = "mesecons_lightstone:lightstone_" .. name .. "_off", param2 = node.param2})
-		end,
-	}}
+		tiles = {texture_on},
+		is_ground_content = false,
+		groups = {cracky = 2, not_in_creative_inventory = 1, mesecon = 2},
+		drop = "mesecons_lightstone:lightstone_" .. name .. "_off",
+		light_source = minetest.LIGHT_MAX - 2,
+		sounds = default.node_sound_stone_defaults(),
+		mesecons = {effector = {
+			rules = lightstone_rules,
+			action_off = function (pos, node)
+				minetest.swap_node(pos, {name = "mesecons_lightstone:lightstone_" .. name .. "_off", param2 = node.param2})
+			end,
+		}},
+		on_blast = mesecon.on_blastnode,
 	})
 
 	minetest.register_craft({
@@ -52,9 +59,15 @@ function mesecon.lightstone_add(name, base_item, texture_off, texture_on)
 end
 
 
-mesecon.lightstone_add("red", "dye:red", "jeija_lightstone_red_off.png", "jeija_lightstone_red_on.png")
-mesecon.lightstone_add("green", "dye:green", "jeija_lightstone_green_off.png", "jeija_lightstone_green_on.png")
-mesecon.lightstone_add("blue", "dye:blue", "jeija_lightstone_blue_off.png", "jeija_lightstone_blue_on.png")
-mesecon.lightstone_add("gray", "dye:grey", "jeija_lightstone_gray_off.png", "jeija_lightstone_gray_on.png")
-mesecon.lightstone_add("darkgray", "dye:dark_grey", "jeija_lightstone_darkgray_off.png", "jeija_lightstone_darkgray_on.png")
-mesecon.lightstone_add("yellow", "dye:yellow", "jeija_lightstone_yellow_off.png", "jeija_lightstone_yellow_on.png")
+mesecon.lightstone_add("red", "dye:red", "jeija_lightstone_red_off.png", "jeija_lightstone_red_on.png", "Red Lightstone")
+mesecon.lightstone_add("green", "dye:green", "jeija_lightstone_green_off.png", "jeija_lightstone_green_on.png", "Green Lightstone")
+mesecon.lightstone_add("blue", "dye:blue", "jeija_lightstone_blue_off.png", "jeija_lightstone_blue_on.png", "Blue Lightstone")
+mesecon.lightstone_add("gray", "dye:grey", "jeija_lightstone_gray_off.png", "jeija_lightstone_gray_on.png", "Grey Lightstone")
+mesecon.lightstone_add("darkgray", "dye:dark_grey", "jeija_lightstone_darkgray_off.png", "jeija_lightstone_darkgray_on.png", "Dark Grey Lightstone")
+mesecon.lightstone_add("yellow", "dye:yellow", "jeija_lightstone_yellow_off.png", "jeija_lightstone_yellow_on.png", "Yellow Lightstone")
+mesecon.lightstone_add("orange", "dye:orange", "jeija_lightstone_orange_off.png", "jeija_lightstone_orange_on.png", "Orange Lightstone")
+mesecon.lightstone_add("white", "dye:white", "jeija_lightstone_white_off.png", "jeija_lightstone_white_on.png", "White Lightstone")
+mesecon.lightstone_add("pink", "dye:pink", "jeija_lightstone_pink_off.png", "jeija_lightstone_pink_on.png", "Pink Lightstone")
+mesecon.lightstone_add("magenta", "dye:magenta", "jeija_lightstone_magenta_off.png", "jeija_lightstone_magenta_on.png", "Magenta Lightstone")
+mesecon.lightstone_add("cyan", "dye:cyan", "jeija_lightstone_cyan_off.png", "jeija_lightstone_cyan_on.png", "Cyan Lightstone")
+mesecon.lightstone_add("violet", "dye:violet", "jeija_lightstone_violet_off.png", "jeija_lightstone_violet_on.png", "Violet Lightstone")

mesecons_luacontroller/doc/luacontroller/description.html

@@ -1,5 +1,7 @@
-The luacontroller is an advanced programmable component.
-You can simply code it in the language mesecons uses itself: Lua!
+The Luacontroller is an advanced programmable component.
+You can simply code it in the language Mesecons uses itself: Lua!
 All the code runs in a sandbox, so it's completely safe (but I won't guarantee that for absolute certainty!).
+It works fine in an unloaded block, loading the block when the program needs to run.
+Events are properly delivered after a server restart.
 
 <a href="http://mesecons.net/luacontroller/">Documentation is available here!</a>

mesecons_luacontroller/init.lua

@@ -12,9 +12,11 @@
 -- ports = get_real_port_states(pos): gets if inputs are powered from outside
 -- newport = merge_port_states(state1, state2): just does result = state1 or state2 for every port
 -- set_port(pos, rule, state): activates/deactivates the mesecons according to the port states
--- set_port_states(pos, ports): Applies new port states to a LuaController at pos
--- run(pos): runs the code in the controller at pos
--- reset_meta(pos, code, errmsg): performs a software-reset, installs new code and prints error messages
+-- set_port_states(pos, ports): Applies new port states to a Luacontroller at pos
+-- run_inner(pos, code, event): runs code on the controller at pos and event
+-- reset_formspec(pos, code, errmsg): installs new code and prints error messages, without resetting LCID
+-- reset_meta(pos, code, errmsg): performs a software-reset, installs new code and prints error message
+-- run(pos, event): a wrapper for run_inner which gets code & handles errors via reset_meta
 -- resetn(pos): performs a hardware reset, turns off all ports
 --
 -- The Sandbox
@@ -141,7 +143,7 @@ local function set_port_states(pos, ports)
 		-- Solution / Workaround:
 		-- Remember which output was turned off and ignore next "off" event.
 		local meta = minetest.get_meta(pos)
-		local ign = minetest.deserialize(meta:get_string("ignore_offevents")) or {}
+		local ign = minetest.deserialize(meta:get_string("ignore_offevents"), true) or {}
 		if ports.a and not vports.a and not mesecon.is_powered(pos, rules.a) then ign.A = true end
 		if ports.b and not vports.b and not mesecon.is_powered(pos, rules.b) then ign.B = true end
 		if ports.c and not vports.c and not mesecon.is_powered(pos, rules.c) then ign.C = true end
@@ -183,7 +185,7 @@ end
 
 local function ignore_event(event, meta)
 	if event.type ~= "off" then return false end
-	local ignore_offevents = minetest.deserialize(meta:get_string("ignore_offevents")) or {}
+	local ignore_offevents = minetest.deserialize(meta:get_string("ignore_offevents"), true) or {}
 	if ignore_offevents[event.pin.name] then
 		ignore_offevents[event.pin.name] = nil
 		meta:set_string("ignore_offevents", minetest.serialize(ignore_offevents))
@@ -196,7 +198,11 @@ end
 -------------------------
 
 local function safe_print(param)
+	local string_meta = getmetatable("")
+	local sandbox = string_meta.__index
+	string_meta.__index = string -- Leave string sandbox temporarily
 	print(dump(param))
+	string_meta.__index = sandbox -- Restore string sandbox
 end
 
 local function safe_date()
@@ -219,7 +225,7 @@ end
 local function safe_string_find(...)
 	if (select(4, ...)) ~= true then
 		debug.sethook() -- Clear hook
-		error("string.find: 'plain' (fourth parameter) must always be true in a LuaController")
+		error("string.find: 'plain' (fourth parameter) must always be true in a Luacontroller")
 	end
 
 	return string.find(...)
@@ -232,10 +238,11 @@ local function remove_functions(x)
 	end
 
 	-- Make sure to not serialize the same table multiple times, otherwise
-	-- writing mem.test = mem in the LuaController will lead to infinite recursion
+	-- writing mem.test = mem in the Luacontroller will lead to infinite recursion
 	local seen = {}
 
 	local function rfuncs(x)
+		if x == nil then return end
 		if seen[x] then return end
 		seen[x] = true
 		if type(x) ~= "table" then return end
@@ -259,50 +266,180 @@ local function remove_functions(x)
 	return x
 end
 
-local function get_interrupt(pos)
+-- itbl: Flat table of functions to run after sandbox cleanup, used to prevent various security hazards
+local function get_interrupt(pos, itbl, send_warning)
 	-- iid = interrupt id
 	local function interrupt(time, iid)
+		-- NOTE: This runs within string metatable sandbox, so don't *rely* on anything of the form (""):y
+		-- Hence the values get moved out. Should take less time than original, so totally compatible
 		if type(time) ~= "number" then return end
-		local luac_id = minetest.get_meta(pos):get_int("luac_id")
-		mesecon.queue:add_action(pos, "lc_interrupt", {luac_id, iid}, time, iid, 1)
+		table.insert(itbl, function ()
+			-- Outside string metatable sandbox, can safely run this now
+			local luac_id = minetest.get_meta(pos):get_int("luac_id")
+			-- Check if IID is dodgy, so you can't use interrupts to store an infinite amount of data.
+			-- Note that this is safe from alter-after-free because this code gets run after the sandbox has ended.
+			-- This runs outside of the timer and *shouldn't* harm perf. unless dodgy data is being sent in the first place
+			iid = remove_functions(iid)
+			local msg_ser = minetest.serialize(iid)
+			if #msg_ser <= mesecon.setting("luacontroller_interruptid_maxlen", 256) then
+				mesecon.queue:add_action(pos, "lc_interrupt", {luac_id, iid}, time, iid, 1)
+			else
+				send_warning("An interrupt ID was too large!")
+			end
+		end)
 	end
 	return interrupt
 end
 
 
-local function get_digiline_send(pos)
-	if not digiline then return end
+-- Given a message object passed to digiline_send, clean it up into a form
+-- which is safe to transmit over the network and compute its "cost" (a very
+-- rough estimate of its memory usage).
+--
+-- The cleaning comprises the following:
+-- 1. Functions (and userdata, though user scripts ought not to get hold of
+--    those in the first place) are removed, because they break the model of
+--    Digilines as a network that carries basic data, and they could exfiltrate
+--    references to mutable objects from one Luacontroller to another, allowing
+--    inappropriate high-bandwidth, no-wires communication.
+-- 2. Tables are duplicated because, being mutable, they could otherwise be
+--    modified after the send is complete in order to change what data arrives
+--    at the recipient, perhaps in violation of the previous cleaning rule or
+--    in violation of the message size limit.
+--
+-- The cost indication is only approximate; it’s not a perfect measurement of
+-- the number of bytes of memory used by the message object.
+--
+-- Parameters:
+-- msg -- the message to clean
+-- back_references -- for internal use only; do not provide
+--
+-- Returns:
+-- 1. The cleaned object.
+-- 2. The approximate cost of the object.
+local function clean_and_weigh_digiline_message(msg, back_references)
+	local t = type(msg)
+	if t == "string" then
+		-- Strings are immutable so can be passed by reference, and cost their
+		-- length plus the size of the Lua object header (24 bytes on a 64-bit
+		-- platform) plus one byte for the NUL terminator.
+		return msg, #msg + 25
+	elseif t == "number" then
+		-- Numbers are passed by value so need not be touched, and cost 8 bytes
+		-- as all numbers in Lua are doubles.
+		return msg, 8
+	elseif t == "boolean" then
+		-- Booleans are passed by value so need not be touched, and cost 1
+		-- byte.
+		return msg, 1
+	elseif t == "table" then
+		-- Tables are duplicated. Check if this table has been seen before
+		-- (self-referential or shared table); if so, reuse the cleaned value
+		-- of the previous occurrence, maintaining table topology and avoiding
+		-- infinite recursion, and charge zero bytes for this as the object has
+		-- already been counted.
+		back_references = back_references or {}
+		local bref = back_references[msg]
+		if bref then
+			return bref, 0
+		end
+		-- Construct a new table by cleaning all the keys and values and adding
+		-- up their costs, plus 8 bytes as a rough estimate of table overhead.
+		local cost = 8
+		local ret = {}
+		back_references[msg] = ret
+		for k, v in pairs(msg) do
+			local k_cost, v_cost
+			k, k_cost = clean_and_weigh_digiline_message(k, back_references)
+			v, v_cost = clean_and_weigh_digiline_message(v, back_references)
+			if k ~= nil and v ~= nil then
+				-- Only include an element if its key and value are of legal
+				-- types.
+				ret[k] = v
+			end
+			-- If we only counted the cost of a table element when we actually
+			-- used it, we would be vulnerable to the following attack:
+			-- 1. Construct a huge table (too large to pass the cost limit).
+			-- 2. Insert it somewhere in a table, with a function as a key.
+			-- 3. Insert it somewhere in another table, with a number as a key.
+			-- 4. The first occurrence doesn’t pay the cost because functions
+			--    are stripped and therefore the element is dropped.
+			-- 5. The second occurrence doesn’t pay the cost because it’s in
+			--    back_references.
+			-- By counting the costs regardless of whether the objects will be
+			-- included, we avoid this attack; it may overestimate the cost of
+			-- some messages, but only those that won’t be delivered intact
+			-- anyway because they contain illegal object types.
+			cost = cost + k_cost + v_cost
+		end
+		return ret, cost
+	else
+		return nil, 0
+	end
+end
+
+
+-- itbl: Flat table of functions to run after sandbox cleanup, used to prevent various security hazards
+local function get_digiline_send(pos, itbl, send_warning)
+	if not minetest.global_exists("digilines") then return end
+	local chan_maxlen = mesecon.setting("luacontroller_digiline_channel_maxlen", 256)
+	local maxlen = mesecon.setting("luacontroller_digiline_maxlen", 50000)
 	return function(channel, msg)
-		minetest.after(0, function()
-			digiline:receptor_send(pos, digiline.rules.default, channel, msg)
+		-- NOTE: This runs within string metatable sandbox, so don't *rely* on anything of the form (""):y
+		--        or via anything that could.
+		-- Make sure channel is string, number or boolean
+		if type(channel) == "string" then
+			if #channel > chan_maxlen then
+				send_warning("Channel string too long.")
+				return false
+			end
+		elseif (type(channel) ~= "string" and type(channel) ~= "number" and type(channel) ~= "boolean") then
+			send_warning("Channel must be string, number or boolean.")
+			return false
+		end
+
+		local msg_cost
+		msg, msg_cost = clean_and_weigh_digiline_message(msg)
+		if msg == nil or msg_cost > maxlen then
+			send_warning("Message was too complex, or contained invalid data.")
+			return false
+		end
+
+		table.insert(itbl, function ()
+			-- Runs outside of string metatable sandbox
+			local luac_id = minetest.get_meta(pos):get_int("luac_id")
+			mesecon.queue:add_action(pos, "lc_digiline_relay", {channel, luac_id, msg})
 		end)
+		return true
 	end
 end
 
 
 local safe_globals = {
+	-- Don't add pcall/xpcall unless willing to deal with the consequences (unless very careful, incredibly likely to allow killing server indirectly)
 	"assert", "error", "ipairs", "next", "pairs", "select",
 	"tonumber", "tostring", "type", "unpack", "_VERSION"
 }
-local function create_environment(pos, mem, event)
+
+local function create_environment(pos, mem, event, itbl, send_warning)
 	-- Gather variables for the environment
 	local vports = minetest.registered_nodes[minetest.get_node(pos).name].virtual_portstates
 	local vports_copy = {}
 	for k, v in pairs(vports) do vports_copy[k] = v end
 	local rports = get_real_port_states(pos)
 
-	-- Create new library tables on each call to prevent one LuaController
-	-- from breaking a library and messing up other LuaControllers.
+	-- Create new library tables on each call to prevent one Luacontroller
+	-- from breaking a library and messing up other Luacontrollers.
 	local env = {
 		pin = merge_port_states(vports, rports),
 		port = vports_copy,
 		event = event,
 		mem = mem,
-		heat = minetest.get_meta(pos):get_int("heat"),
+		heat = mesecon.get_heat(pos),
 		heat_max = mesecon.setting("overheat_max", 20),
 		print = safe_print,
-		interrupt = get_interrupt(pos),
-		digiline_send = get_digiline_send(pos),
+		interrupt = get_interrupt(pos, itbl, send_warning),
+		digiline_send = get_digiline_send(pos, itbl, send_warning),
 		string = {
 			byte = string.byte,
 			char = string.char,
@@ -390,10 +527,11 @@ local function create_sandbox(code, env)
 		jit.off(f, true)
 	end
 
+	local maxevents = mesecon.setting("luacontroller_maxevents", 10000)
 	return function(...)
+		-- NOTE: This runs within string metatable sandbox, so the setting's been moved out for safety
 		-- Use instruction counter to stop execution
 		-- after luacontroller_maxevents
-		local maxevents = mesecon.setting("luacontroller_maxevents", 10000)
 		debug.sethook(timeout, "", maxevents)
 		local ok, ret = pcall(f, ...)
 		debug.sethook()  -- Clear hook
@@ -404,7 +542,7 @@ end
 
 
 local function load_memory(meta)
-	return minetest.deserialize(meta:get_string("lc_memory")) or {}
+	return minetest.deserialize(meta:get_string("lc_memory"), true) or {}
 end
 
 
@@ -414,6 +552,7 @@ local function save_memory(pos, meta, mem)
 
 	if (#memstring <= memsize_max) then
 		meta:set_string("lc_memory", memstring)
+		meta:mark_as_private("lc_memory")
 	else
 		print("Error: Luacontroller memory overflow. "..memsize_max.." bytes available, "
 				..#memstring.." required. Controller overheats.")
@@ -421,26 +560,42 @@ local function save_memory(pos, meta, mem)
 	end
 end
 
-
-local function run(pos, event)
+-- Returns success (boolean), errmsg (string)
+-- run (as opposed to run_inner) is responsible for setting up meta according to this output
+local function run_inner(pos, code, event)
 	local meta = minetest.get_meta(pos)
-	if overheat(pos) then return end
-	if ignore_event(event, meta) then return end
+	-- Note: These return success, presumably to avoid changing LC ID.
+	if overheat(pos) then return true, "" end
+	if ignore_event(event, meta) then return true, "" end
 
 	-- Load code & mem from meta
 	local mem  = load_memory(meta)
 	local code = meta:get_string("code")
 
+	-- 'Last warning' label.
+	local warning = ""
+	local function send_warning(str)
+		warning = "Warning: " .. str
+	end
+
 	-- Create environment
-	local env = create_environment(pos, mem, event)
+	local itbl = {}
+	local env = create_environment(pos, mem, event, itbl, send_warning)
 
 	-- Create the sandbox and execute code
 	local f, msg = create_sandbox(code, env)
-	if not f then return msg end
+	if not f then return false, msg end
+	-- Start string true sandboxing
+	local onetruestring = getmetatable("")
+	-- If a string sandbox is already up yet inconsistent, something is very wrong
+	assert(onetruestring.__index == string)
+	onetruestring.__index = env.string
 	local success, msg = pcall(f)
-	if not success then return msg end
+	onetruestring.__index = string
+	-- End string true sandboxing
+	if not success then return false, msg end
 	if type(env.port) ~= "table" then
-		return "Ports set are invalid."
+		return false, "Ports set are invalid."
 	end
 
 	-- Actually set the ports
@@ -448,8 +603,58 @@ local function run(pos, event)
 
 	-- Save memory. This may burn the luacontroller if a memory overflow occurs.
 	save_memory(pos, meta, env.mem)
+
+	-- Execute deferred tasks
+	for _, v in ipairs(itbl) do
+		local failure = v()
+		if failure then
+			return false, failure
+		end
+	end
+	return true, warning
 end
 
+local function reset_formspec(meta, code, errmsg)
+	meta:set_string("code", code)
+	meta:mark_as_private("code")
+	code = minetest.formspec_escape(code or "")
+	errmsg = minetest.formspec_escape(tostring(errmsg or ""))
+	meta:set_string("formspec", "size[12,10]"
+		.."background[-0.2,-0.25;12.4,10.75;jeija_luac_background.png]"
+		.."label[0.1,8.3;"..errmsg.."]"
+		.."textarea[0.2,0.2;12.2,9.5;code;;"..code.."]"
+		.."image_button[4.75,8.75;2.5,1;jeija_luac_runbutton.png;program;]"
+		.."image_button_exit[11.72,-0.25;0.425,0.4;jeija_close_window.png;exit;]"
+		)
+end
+
+local function reset_meta(pos, code, errmsg)
+	local meta = minetest.get_meta(pos)
+	reset_formspec(meta, code, errmsg)
+	meta:set_int("luac_id", math.random(1, 65535))
+end
+
+-- Wraps run_inner with LC-reset-on-error
+local function run(pos, event)
+	local meta = minetest.get_meta(pos)
+	local code = meta:get_string("code")
+	local ok, errmsg = run_inner(pos, code, event)
+	if not ok then
+		reset_meta(pos, code, errmsg)
+	else
+		reset_formspec(meta, code, errmsg)
+	end
+	return ok, errmsg
+end
+
+local function reset(pos)
+	set_port_states(pos, {a=false, b=false, c=false, d=false})
+end
+
+-----------------------
+-- A.Queue callbacks --
+-----------------------
+
 mesecon.queue:add_function("lc_interrupt", function (pos, luac_id, iid)
 	-- There is no luacontroller anymore / it has been reprogrammed / replaced / burnt
 	if (minetest.get_meta(pos):get_int("luac_id") ~= luac_id) then return end
@@ -457,25 +662,14 @@ mesecon.queue:add_function("lc_interrupt", function (pos, luac_id, iid)
 	run(pos, {type="interrupt", iid = iid})
 end)
 
-local function reset_meta(pos, code, errmsg)
-	local meta = minetest.get_meta(pos)
-	meta:set_string("code", code)
-	code = minetest.formspec_escape(code or "")
-	errmsg = minetest.formspec_escape(errmsg or "")
-	meta:set_string("formspec", "size[10,8]"..
-		"background[-0.2,-0.25;10.4,8.75;jeija_luac_background.png]"..
-		"textarea[0.2,0.6;10.2,5;code;;"..code.."]"..
-		"image_button[3.75,6;2.5,1;jeija_luac_runbutton.png;program;]"..
-		"image_button_exit[9.72,-0.25;0.425,0.4;jeija_close_window.png;exit;]"..
-		"label[0.1,5;"..errmsg.."]")
-	meta:set_int("heat", 0)
-	meta:set_int("luac_id", math.random(1, 65535))
-end
-
-local function reset(pos)
-	set_port_states(pos, {a=false, b=false, c=false, d=false})
-end
-
+mesecon.queue:add_function("lc_digiline_relay", function (pos, channel, luac_id, msg)
+	if not digiline then return end
+	-- This check is only really necessary because in case of server crash, old actions can be thrown into the future
+	if (minetest.get_meta(pos):get_int("luac_id") ~= luac_id) then return end
+	if (minetest.registered_nodes[minetest.get_node(pos).name].is_burnt) then return end
+	-- The actual work
+	digiline:receptor_send(pos, digiline.rules.default, channel, msg)
+end)
 
 -----------------------
 -- Node Registration --
@@ -502,10 +696,23 @@ local digiline = {
 	receptor = {},
 	effector = {
 		action = function(pos, node, channel, msg)
+			msg = clean_and_weigh_digiline_message(msg)
 			run(pos, {type = "digiline", channel = channel, msg = msg})
 		end
 	}
 }
+
+local function get_program(pos)
+	local meta = minetest.get_meta(pos)
+	return meta:get_string("code")
+end
+
+local function set_program(pos, code)
+	reset(pos)
+	reset_meta(pos, code)
+	return run(pos, {type="program"})
+end
+
 local function on_receive_fields(pos, form_name, fields, sender)
 	if not fields.program then
 		return
@@ -515,12 +722,10 @@ local function on_receive_fields(pos, form_name, fields, sender)
 		minetest.record_protection_violation(pos, name)
 		return
 	end
-	reset(pos)
-	reset_meta(pos, fields.code)
-	local err = run(pos, {type="program"})
-	if err then
-		print(err)
-		reset_meta(pos, fields.code, err)
+	local ok, err = set_program(pos, fields.code)
+	if not ok then
+		-- it's not an error from the server perspective
+		minetest.log("action", "Lua controller programming error: " .. tostring(err))
 	end
 end
 
@@ -574,11 +779,15 @@ for d = 0, 1 do
 		receptor = {
 			state = mesecon.state.on,
 			rules = output_rules[cid]
-		}
+		},
+		luacontroller = {
+			get_program = get_program,
+			set_program = set_program,
+		},
 	}
 
 	minetest.register_node(node_name, {
-		description = "LuaController",
+		description = "Luacontroller",
 		drawtype = "nodebox",
 		tiles = {
 			top,
@@ -590,6 +799,7 @@ for d = 0, 1 do
 		},
 		inventory_image = top,
 		paramtype = "light",
+		is_ground_content = false,
 		groups = groups,
 		drop = BASENAME.."0000",
 		sunlight_propagates = true,
@@ -609,9 +819,11 @@ for d = 0, 1 do
 			d = d == 1,
 		},
 		after_dig_node = function (pos, node)
+			mesecon.do_cooldown(pos)
 			mesecon.receptor_off(pos, output_rules)
 		end,
 		is_luacontroller = true,
+		on_blast = mesecon.on_blastnode,
 	})
 end
 end
@@ -619,7 +831,7 @@ end
 end
 
 ------------------------------
--- Overheated LuaController --
+-- Overheated Luacontroller --
 ------------------------------
 
 minetest.register_node(BASENAME .. "_burnt", {
@@ -635,6 +847,7 @@ minetest.register_node(BASENAME .. "_burnt", {
 	inventory_image = "jeija_luacontroller_burnt_top.png",
 	is_burnt = true,
 	paramtype = "light",
+	is_ground_content = false,
 	groups = {dig_immediate=2, not_in_creative_inventory=1},
 	drop = BASENAME.."0000",
 	sunlight_propagates = true,
@@ -652,6 +865,7 @@ minetest.register_node(BASENAME .. "_burnt", {
 			end,
 		},
 	},
+	on_blast = mesecon.on_blastnode,
 })
 
 ------------------------