add green and yellow wall signs

(intended for traffic signage or similar)

Rework related textures.  Use steel ingots and green, white, black, yellow dyes
to craft.  Can also use "sheet metal" from my fork of Zeg9's steel mod.

signs_lib/init.lua

@@ -484,13 +484,16 @@ signs_lib.update_sign = function(pos, fields)
 
 	-- if there is no entity
 	local sign_info
-	if minetest.get_node(pos).name == "signs:sign_yard" then
+	local signnode = minetest.get_node(pos)
+	if signnode.name == "signs:sign_yard" then
 		sign_info = signs_lib.yard_sign_model.textpos[minetest.get_node(pos).param2 + 1]
-	elseif minetest.get_node(pos).name == "signs:sign_hanging" then
+	elseif signnode.name == "signs:sign_hanging" then
 		sign_info = signs_lib.hanging_sign_model.textpos[minetest.get_node(pos).param2 + 1]
-	elseif minetest.get_node(pos).name == "default:sign_wall" then
+	elseif signnode.name == "default:sign_wall" 
+		or signnode.name == "signs:sign_wall_green"
+		or signnode.name == "signs:sign_wall_yellow" then
 		sign_info = signs_lib.wall_sign_model.textpos[minetest.get_node(pos).param2 + 1]
-	else --if minetest.get_node(pos).name == "signs:sign_post" then
+	else -- ...it must be a sign on a fence post.
 		sign_info = signs_lib.sign_post_model.textpos[minetest.get_node(pos).param2 + 1]
 	end
 	if sign_info == nil then
@@ -553,19 +556,22 @@ function signs_lib.determine_sign_type(itemstack, placer, pointed_thing)
 		local sign_info
 		local pt_name = minetest.get_node(under).name
 		print(dump(pt_name))
+		local signname = itemstack:get_name()
 
-		if fences_with_sign[pt_name] then
+		if fences_with_sign[pt_name] and signname == "default:sign_wall" then
 			minetest.add_node(under, {name = fences_with_sign[pt_name], param2 = fdir})
 			sign_info = signs_lib.sign_post_model.textpos[fdir + 1]
 
-		elseif wdir == 0 then
+		elseif wdir == 0 and signname == "default:sign_wall" then
 			minetest.add_node(above, {name = "signs:sign_hanging", param2 = fdir})
 			sign_info = signs_lib.hanging_sign_model.textpos[fdir + 1]
-		elseif wdir == 1 then
+
+		elseif wdir == 1 and signname == "default:sign_wall" then
 			minetest.add_node(above, {name = "signs:sign_yard", param2 = fdir})
 			sign_info = signs_lib.yard_sign_model.textpos[fdir + 1]
+
 		else
-			minetest.add_node(above, {name = "default:sign_wall", param2 = fdir})
+			minetest.add_node(above, {name = signname, param2 = fdir})
 			sign_info = signs_lib.wall_sign_model.textpos[fdir + 1]
 		end
 
@@ -714,6 +720,78 @@ minetest.register_node(":signs:sign_post", {
     },
 })
 
+minetest.register_node(":signs:sign_wall_green", {
+	description = S("Sign (green, metal)"),
+	inventory_image = "signs_green_inv.png",
+	wield_image = "signs_green_inv.png",
+	node_placement_prediction = "",
+	paramtype = "light",
+	sunlight_propagates = true,
+	paramtype2 = "facedir",
+	drawtype = "nodebox",
+	node_box = signs_lib.wall_sign_model.nodebox,
+	tiles = {
+		"signs_green_top.png",
+		"signs_green_bottom.png",
+		"signs_green_sides.png",
+		"signs_green_sides.png",
+		"signs_back_metal.png",
+		"signs_green_front.png"
+	},
+	groups = sign_groups,
+	on_place = function(itemstack, placer, pointed_thing)
+		return signs_lib.determine_sign_type(itemstack, placer, pointed_thing)
+	end,
+	on_construct = function(pos)
+		signs_lib.construct_sign(pos)
+	end,
+	on_destruct = function(pos)
+		signs_lib.destruct_sign(pos)
+	end,
+	on_receive_fields = function(pos, formname, fields, sender)
+		signs_lib.receive_fields(pos, formname, fields, sender)
+	end,
+	on_punch = function(pos, node, puncher)
+		signs_lib.update_sign(pos)
+	end,
+})
+
+minetest.register_node(":signs:sign_wall_yellow", {
+	description = S("Sign (yellow, metal)"),
+	inventory_image = "signs_yellow_inv.png",
+	wield_image = "signs_yellow_inv.png",
+	node_placement_prediction = "",
+	paramtype = "light",
+	sunlight_propagates = true,
+	paramtype2 = "facedir",
+	drawtype = "nodebox",
+	node_box = signs_lib.wall_sign_model.nodebox,
+	tiles = {
+		"signs_yellow_top.png",
+		"signs_yellow_bottom.png",
+		"signs_yellow_sides.png",
+		"signs_yellow_sides.png",
+		"signs_back_metal.png",
+		"signs_yellow_front.png"
+	},
+	groups = sign_groups,
+	on_place = function(itemstack, placer, pointed_thing)
+		return signs_lib.determine_sign_type(itemstack, placer, pointed_thing)
+	end,
+	on_construct = function(pos)
+		signs_lib.construct_sign(pos)
+	end,
+	on_destruct = function(pos)
+		signs_lib.destruct_sign(pos)
+	end,
+	on_receive_fields = function(pos, formname, fields, sender)
+		signs_lib.receive_fields(pos, formname, fields, sender)
+	end,
+	on_punch = function(pos, node, puncher)
+		signs_lib.update_sign(pos)
+	end,
+})
+
 local signs_text_on_activate
 
 signs_text_on_activate = function(self)
@@ -811,6 +889,40 @@ minetest.register_alias("homedecor:fence_wood_with_sign", "signs:sign_post")
 
 signs_lib.register_fence_with_sign("default:fence_wood", "signs:sign_post")
 
+-- craft recipes for the green and yellow signs
+
+minetest.register_craft( {
+        output = "signs:sign_wall_green 4",
+        recipe = {
+			{ "dye:dark_green", "dye:white", "dye:dark_green" },
+			{ "default:steel_ingot", "default:steel_ingot", "default:steel_ingot" }
+        },
+})
+
+minetest.register_craft( {
+        output = "signs:sign_wall_green 2",
+        recipe = {
+			{ "dye:dark_green", "dye:white", "dye:dark_green" },
+			{ "steel:sheet_metal", "steel:sheet_metal", "steel:sheet_metal" }
+        },
+})
+
+minetest.register_craft( {
+        output = "signs:sign_wall_yellow 4",
+        recipe = {
+			{ "dye:yellow", "dye:black", "dye:yellow" },
+			{ "default:steel_ingot", "default:steel_ingot", "default:steel_ingot" }
+        },
+})
+
+minetest.register_craft( {
+        output = "signs:sign_wall_yellow 2",
+        recipe = {
+			{ "dye:yellow", "dye:black", "dye:yellow" },
+			{ "steel:sheet_metal", "steel:sheet_metal", "steel:sheet_metal" }
+        },
+})
+
 if minetest.setting_get("log_mods") then
 	minetest.log("action", S("signs loaded"))
 end