mesecons/mesecons_extrawires/crossing.lua

for x=-1, 1 do for z=-1, 1 do
	rules = {}
	nodename = "mesecons_extrawires:crossing"
	if x == -1 then
		nodename = nodename .. "A"
		table.insert(rules, {x=-1, y=0, z=0})
	end
	if z == 1 then
		nodename = nodename .. "B"
		table.insert(rules, {x=0, y=0, z=1})
	end
	if x == 1 then
		nodename = nodename .. "C"
		table.insert(rules, {x=1, y=0, z=0})
	end
	if z == -1 then
		nodename = nodename .. "D"
		table.insert(rules, {x=0, y=0, z=-1})
	end
	mesecon:add_rules(nodename, rules)
	mesecon:register_effector(nodename, nodename, all_rules)
	if nodename == "mesecons_extrawires:crossing" then
		description = "Insulated Crossing"
		groups = {dig_immediate = 3, mesecon = 3, mesecon_conductor_craftable=1}
	else
		description = "You hacker you!"
		drop = "mesecons_extrawires:crossing"
		groups = {dig_immediate = 3, not_in_creative_inventory=1, mesecon = 3}
		mesecon:add_receptor_node(nodename, rules)
	end
	minetest.register_node(nodename, {
		drawtype = "nodebox",
		description = description,
		tiles = {
			"jeija_insulated_wire_sides.png",
		},
		paramtype = "light",
		walkable = false,
		stack_max = 99,
		selection_box = {
			type = "fixed",
			fixed = { -16/32-0.0001, -18/32, -16/32-0.001, 16/32+0.001, -5/32, 16/32+0.001 },
		},
		node_box = {
			type = "fixed",
			fixed = {
				{ -16/32-0.001, -17/32, -3/32, 16/32+0.001, -13/32, 3/32 },
				{ -3/32, -17/32, -16/32-0.001, 3/32, -13/32, -6/32 },
				{ -3/32, -13/32, -9/32, 3/32, -6/32, -6/32 },
				{ -3/32, -9/32, -9/32, 3/32, -6/32, 9/32 },
				{ -3/32, -13/32, 6/32, 3/32, -6/32, 9/32 },
				{ -3/32, -17/32, 6/32, 3/32, -13/32, 16/32+0.001 },
			},
		},
		groups = groups,
		drop = drop,
	})
end end

function receptor_set(pos, rules, on)
	if on then
		mesecon:receptor_on(pos, rules)
	else
		mesecon:receptor_off(pos, rules)
	end
end

function update_plus(pos, name)
	vL = {
		a = string.find(name, "A")~=nil,
		b = string.find(name, "B")~=nil,
		c = string.find(name, "C")~=nil,
		d = string.find(name, "D")~=nil,
	}
	rL = yc_get_real_portstates(pos)
	L = {
		a = rL.c and not vL.c,
		b = rL.d and not vL.d,
		c = rL.a and not vL.a,
		d = rL.b and not vL.b,
	}
	newname = "mesecons_extrawires:crossing"
	if L.a then newname = newname .. "A" end
	if L.b then newname = newname .. "B" end
	if L.c then newname = newname .. "C" end
	if L.d then newname = newname .. "D" end
	if newname ~= name then
		minetest.env:add_node(pos, {name = newname})
	end
	if L.a ~= vL.a then
		receptor_set(pos, mesecon:get_rules("mesecons_extrawires:crossingA"), L.a)
		if not L.a and yc_get_real_portstates(pos).a then
			--catch signal changing direction while on
			update_plus(pos, newname)
		end
	end
	if L.b ~= vL.b then
		receptor_set(pos, mesecon:get_rules("mesecons_extrawires:crossingB"), L.b)
		if not L.b and yc_get_real_portstates(pos).b then
			update_plus(pos, newname)
		end
	end
	if L.c ~= vL.c then
		receptor_set(pos, mesecon:get_rules("mesecons_extrawires:crossingC"), L.c)
		if not L.c and yc_get_real_portstates(pos).c then
			update_plus(pos, newname)
		end
	end
	if L.d ~= vL.d then
		receptor_set(pos, mesecon:get_rules("mesecons_extrawires:crossingD"), L.d)
		if not L.c and yc_get_real_portstates(pos).d then
			update_plus(pos, newname)
		end
	end
end

mesecon:register_on_signal_change(function(pos, node)
	if string.find(node.name, "mesecons_extrawires:crossing")~=nil then
		update_plus(pos, node.name)
	end
end)

minetest.register_craft({
	type = "shapeless",
	output = "mesecons_extrawires:crossing",
	recipe = {
		"mesecons_insulated:insulated_off",
		"mesecons_insulated:insulated_off",
	},
})

minetest.register_craft({
	type = "shapeless",
	output = "mesecons_insulated:insulated_off 2",
	recipe = {
		"mesecons_extrawires:crossing",
	},
})