add mesecons mods

mods/mesecons/mesecons_gates/doc/and/description.html

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+AND gates power their output if both inputs (from left and right) are powered.
+They work in unloaded blocks.

mods/mesecons/mesecons_gates/doc/diode/description.html

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+Diodes conduct signals in one direction only.
+They work in unloaded blocks.

mods/mesecons/mesecons_gates/doc/nand/description.html

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+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.

mods/mesecons/mesecons_gates/doc/nor/description.html

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+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.

mods/mesecons/mesecons_gates/doc/not/description.html

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+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.

mods/mesecons/mesecons_gates/doc/or/description.html

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+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.

mods/mesecons/mesecons_gates/doc/xor/description.html

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+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.

mods/mesecons/mesecons_gates/init.lua

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+local S = minetest.get_translator(minetest.get_current_modname())
+
+local selection_box = {
+	type = "fixed",
+	fixed = { -8/16, -8/16, -8/16, 8/16, -6/16, 8/16 }
+}
+
+local nodebox = {
+	type = "fixed",
+	fixed = {
+		{ -8/16, -8/16, -8/16, 8/16, -7/16, 8/16 }, -- bottom slab
+		{ -6/16, -7/16, -6/16, 6/16, -6/16, 6/16 }
+	},
+}
+
+local gate_get_output_rules = mesecon.horiz_rules_getter({{x = 1, y = 0, z = 0}})
+
+local gate_get_input_rules_oneinput = mesecon.horiz_rules_getter({{x =-1, y = 0, z = 0}})
+
+local gate_get_input_rules_twoinputs = mesecon.horiz_rules_getter({
+	{x = 0, y = 0, z = 1, name = "input1"},
+	{x = 0, y = 0, z = -1, name = "input2"},
+})
+
+local function set_gate(pos, node, state)
+	local gate = minetest.registered_nodes[node.name]
+
+	local new_nodename = state and gate.onstate or gate.offstate
+	minetest.swap_node(pos, {name = new_nodename, param2 = node.param2})
+	if new_nodename ~= node.name then
+		if mesecon.do_overheat(pos) then
+			minetest.remove_node(pos)
+			mesecon.receptor_off(pos, gate_get_output_rules(node))
+			minetest.add_item(pos, gate.drop)
+		elseif state then
+			mesecon.receptor_on(pos, gate_get_output_rules(node))
+		else
+			mesecon.receptor_off(pos, gate_get_output_rules(node))
+		end
+	end
+end
+
+local function update_gate(pos, node, link, newstate)
+	local gate = minetest.registered_nodes[node.name]
+
+	if gate.inputnumber == 1 then
+		set_gate(pos, node, gate.assess(newstate == "on"))
+	elseif gate.inputnumber == 2 then
+		-- Inputs are stored in param2. Bit 5 is always set.
+		-- input1 is bit 6 and input2 is bit 7.
+		local val1, val2
+		if node.param2 >= 32 then
+			-- Bit 5 is set, so param2 is in the proper format.
+			if link.name == "input1" then
+				val1 = newstate == "on"
+				val2 = node.param2 >= 128
+			else
+				val1 = node.param2 % 128 >= 64
+				val2 = newstate == "on"
+			end
+		else
+			-- Migrate old gates where the inputs are stored as metadata.
+			-- This also triggers for newly placed gates.
+			local meta = minetest.get_meta(pos)
+			if link.name == "input1" then
+				val1 = newstate == "on"
+				val2 = meta:get_int("input2") == 1
+			else
+				val1 = meta:get_int("input1") == 1
+				val2 = newstate == "on"
+			end
+			-- Set bit 5 so this won't happen again.
+			node.param2 = node.param2 + 32
+			-- Clear the metadata.
+			meta:set_string("input1", "")
+			meta:set_string("input2", "")
+		end
+		node.param2 = node.param2 % 64 + (val1 and 64 or 0) + (val2 and 128 or 0)
+		set_gate(pos, node, gate.assess(val1, val2))
+	end
+end
+
+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 basename = "mesecons_gates:"..name
+	mesecon.register_node(basename, {
+		description = description,
+		inventory_image = "jeija_gate_off.png^jeija_gate_"..name..".png",
+		paramtype = "light",
+		paramtype2 = "4dir",
+		is_ground_content = false,
+		drawtype = "nodebox",
+		drop = basename.."_off",
+		selection_box = selection_box,
+		node_box = nodebox,
+		walkable = true,
+		sounds = mesecon.node_sound.stone,
+		assess = assess,
+		onstate = basename.."_on",
+		offstate = basename.."_off",
+		inputnumber = inputnumber,
+		after_dig_node = mesecon.do_cooldown,
+		on_rotate = mesecon.on_rotate,
+	},{
+		tiles = {
+			"jeija_microcontroller_bottom.png^".."jeija_gate_off.png^"..
+			"jeija_gate_output_off.png^".."jeija_gate_"..name..".png",
+			"jeija_microcontroller_bottom.png^".."jeija_gate_output_off.png^"..
+			"[transformFY",
+			"jeija_gate_side.png^".."jeija_gate_side_output_off.png",
+			"jeija_gate_side.png",
+			"jeija_gate_side.png",
+			"jeija_gate_side.png"
+		},
+		groups = {dig_immediate = 2, overheat = 1},
+		mesecons = { receptor = {
+			state = "off",
+			rules = gate_get_output_rules
+		}, effector = {
+			rules = get_inputrules,
+			action_change = update_gate
+		}}
+	},{
+		tiles = {
+			"jeija_microcontroller_bottom.png^".."jeija_gate_on.png^"..
+			"jeija_gate_output_on.png^".."jeija_gate_"..name..".png",
+			"jeija_microcontroller_bottom.png^".."jeija_gate_output_on.png^"..
+			"[transformFY",
+			"jeija_gate_side.png^".."jeija_gate_side_output_on.png",
+			"jeija_gate_side.png",
+			"jeija_gate_side.png",
+			"jeija_gate_side.png"
+		},
+		groups = {dig_immediate = 2, not_in_creative_inventory = 1, overheat = 1},
+		mesecons = { receptor = {
+			state = "on",
+			rules = gate_get_output_rules
+		}, effector = {
+			rules = get_inputrules,
+			action_change = update_gate
+		}}
+	})
+
+	minetest.register_craft({output = basename.."_off", recipe = recipe})
+end
+
+register_gate("diode", 1, function (input) return input end,
+	{{"mesecons:mesecon", "mesecons_torch:mesecon_torch_on", "mesecons_torch:mesecon_torch_on"}},
+	S("Diode"))
+
+register_gate("not", 1, function (input) return not input end,
+	{{"mesecons:mesecon", "mesecons_torch:mesecon_torch_on", "mesecons:mesecon"}},
+	S("NOT Gate"))
+
+register_gate("and", 2, function (val1, val2) return val1 and val2 end,
+	{{"mesecons:mesecon", "", ""},
+	 {"", "mesecons_materials:silicon", "mesecons:mesecon"},
+	 {"mesecons:mesecon", "", ""}},
+	S("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", "", ""}},
+	S("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", "", ""}},
+	S("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", "", ""}},
+	S("NOR Gate"))
+
+register_gate("or", 2, function (val1, val2) return (val1 or val2) end,
+	{{"mesecons:mesecon", "", ""},
+	 {"", "mesecons:mesecon", "mesecons:mesecon"},
+	 {"mesecons:mesecon", "", ""}},
+	S("OR Gate"))

mods/mesecons/mesecons_gates/locale/mesecons_gates.ru.tr

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+# textdomain: mesecons_gates
+Diode=Диод
+NOT Gate=НЕ-шлюз
+AND Gate=И-шлюз
+NAND Gate=NAND-шлюз
+XOR Gate=XOR-шлюз
+NOR Gate=NOR-шлюз
+OR Gate=ИЛИ-шлюз

mods/mesecons/mesecons_gates/locale/mesecons_gates.uk.tr

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+# textdomain: mesecons_gates
+Diode=Діод
+NOT Gate=NOT перехідник
+AND Gate=AND перехідник
+NAND Gate=NAND перехідник
+XOR Gate=XOR перехідник
+NOR Gate=NOR перехідник
+OR Gate=OR перехідник

mods/mesecons/mesecons_gates/locale/template.txt

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+# textdomain: mesecons_gates
+Diode=
+NOT Gate=
+AND Gate=
+NAND Gate=
+XOR Gate=
+NOR Gate=
+OR Gate=

mods/mesecons/mesecons_gates/mod.conf

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+name = mesecons_gates
+depends = mesecons, mesecons_gamecompat, mesecons_microcontroller, mesecons_delayer, mesecons_torch, mesecons_materials