Add support for colored cables

As requested by player "anju64".

power/electric_cable.lua

@@ -32,7 +32,9 @@ local Cable = tubelib2.Tube:new({
 		"techage:power_pole2", "techage:powerswitch_box", "techage:powerswitch_box_on"},
 	secondary_node_names = {},
 	after_place_tube = function(pos, param2, tube_type, num_tubes)
-		local name = minetest.get_node(pos).name
+		local node = minetest.get_node(pos)
+		local name = node.name
+		local color_param2 = math.floor(node.param2 / 32) * 32
 		if name == "techage:powerswitch_box" or name == "techage:powerswitch_box_on" or name == "techage:powerswitch_box_off" then
 			minetest.swap_node(pos, {name = name, param2 = param2 % 32})
 		elseif name == "techage:power_line" or name == "techage:power_lineS" or name == "techage:power_lineA" then
@@ -40,9 +42,10 @@ local Cable = tubelib2.Tube:new({
 		elseif name == "techage:power_pole2" then
 			-- nothing
 		elseif not networks.hidden_name(pos) then
-			minetest.swap_node(pos, {name = "techage:electric_cable"..tube_type, param2 = param2 % 32})
+			minetest.swap_node(pos, {name = "techage:electric_cable"..tube_type, param2 = param2 % 32 + color_param2})
 		end
 		M(pos):set_int("netw_param2", param2)
+		M(pos):set_int("netw_color_param2", color_param2)
 	end,
 })
 
@@ -55,6 +58,15 @@ Cable:register_on_tube_update2(function(pos, outdir, tlib2, node)
 	power.update_network(pos, outdir, tlib2, node)
 end)
 
+local preserve_metadata = function(pos, oldnode, oldmeta, drops)
+	for _,drop in ipairs(drops) do
+		local meta = drop:get_meta()
+		if meta:get_int("palette_index") == 0 then
+			meta:set_string("palette_index", "")
+		end
+	end
+end
+
 minetest.register_node("techage:electric_cableS", {
 	description = S("TA Electric Cable"),
 	tiles = {
@@ -63,8 +75,16 @@ minetest.register_node("techage:electric_cableS", {
 		"techage_electric_cable.png",
 		"techage_electric_cable.png",
 		"techage_electric_cable.png",
-		"techage_electric_cable_end.png",
+		"techage_electric_cable.png",
-		"techage_electric_cable_end.png",
+		"techage_electric_cable.png",
+	},
+	overlay_tiles = {
+		"",
+		"",
+		"",
+		"",
+		{ name = "techage_electric_cable_end.png", color = "white" },
+		{ name = "techage_electric_cable_end.png", color = "white" },
 	},
 	
 	after_place_node = function(pos, placer, itemstack, pointed_thing)
@@ -79,7 +99,8 @@ minetest.register_node("techage:electric_cableS", {
 		Cable:after_dig_tube(pos, oldnode, oldmetadata)
 	end,
 	
-	paramtype2 = "facedir", -- important!
+	paramtype2 = "colorfacedir", -- important!
+	palette = "techage_cable_palette.png",
 	drawtype = "nodebox",
 	node_box = {
 		type = "fixed",
@@ -94,6 +115,7 @@ minetest.register_node("techage:electric_cableS", {
 	is_ground_content = false,
 	groups = {snappy = 2, choppy = 2, oddly_breakable_by_hand = 3, techage_trowel = 1},
 	sounds = default.node_sound_defaults(),
+	preserve_metadata = preserve_metadata,
 })
 
 minetest.register_node("techage:electric_cableA", {
@@ -101,18 +123,27 @@ minetest.register_node("techage:electric_cableA", {
 	tiles = {
 		-- up, down, right, left, back, front
 		"techage_electric_cable.png",
-		"techage_electric_cable_end.png",
 		"techage_electric_cable.png",
 		"techage_electric_cable.png",
 		"techage_electric_cable.png",
-		"techage_electric_cable_end.png",
+		"techage_electric_cable.png",
+		"techage_electric_cable.png",
+	},
+	overlay_tiles = {
+		"",
+		{ name = "techage_electric_cable_end.png", color = "white" },
+		"",
+		"",
+		"",
+		{ name = "techage_electric_cable_end.png", color = "white" },
 	},
 	
 	after_dig_node = function(pos, oldnode, oldmetadata, digger)
 		Cable:after_dig_tube(pos, oldnode, oldmetadata)
 	end,
 	
-	paramtype2 = "facedir", -- important!
+	paramtype2 = "colorfacedir", -- important!
+	palette = "techage_cable_palette.png",
 	drawtype = "nodebox",
 	node_box = {
 		type = "fixed",
@@ -129,7 +160,12 @@ minetest.register_node("techage:electric_cableA", {
 	groups = {snappy = 2, choppy = 2, oddly_breakable_by_hand = 3, 
 			techage_trowel = 1, not_in_creative_inventory = 1},
 	sounds = default.node_sound_defaults(),
-	drop = "techage:electric_cableS",
+	drop = {
+		items = {
+			{ items = { "techage:electric_cableS" }, inherit_color = true },
+		}
+	},
+	preserve_metadata = preserve_metadata,
 })
 
 minetest.register_craft({
@@ -142,4 +178,16 @@ minetest.register_craft({
 })
 
 techage.ElectricCable = Cable
-techage.ELE1_MAX_CABLE_LENGHT = ELE1_MAX_CABLE_LENGHT
+techage.ELE1_MAX_CABLE_LENGTH = ELE1_MAX_CABLE_LENGTH
+
+
+for idx, color in ipairs({ "white", "grey", "black", "brown", "yellow", "red", "dark_green", "blue" }) do
+	minetest.register_craft({
+		output = idx == 1 and "techage:electric_cableS 8" or minetest.itemstring_with_palette("techage:electric_cableS 8", (idx-1)*32),
+		recipe = {
+			{ "techage:electric_cableS", "techage:electric_cableS", "techage:electric_cableS", },
+			{ "techage:electric_cableS", "dye:"..color, "techage:electric_cableS", },
+			{ "techage:electric_cableS", "techage:electric_cableS", "techage:electric_cableS", },
+		}
+	})
+end