Add glass and obsidian glass signs

requires signs_lib commit c66c1b7 or later
(otherwise the entity won't be visible from the back side).

crafting.lua

@@ -136,3 +136,40 @@ minetest.register_craft( {
 			{ "steel:sheet_metal", "steel:sheet_metal", "steel:sheet_metal" }
 	},
 })
+
+minetest.register_craft( {
+	output = "basic_signs:sign_wall_glass 8",
+	recipe = {
+			{ "default:glass", "default:glass", "default:glass" },
+			{ "default:glass", "default:glass", "default:glass" },
+			{ "",              "default:glass", "" }
+	},
+})
+
+minetest.register_craft( {
+	output = "basic_signs:sign_wall_obsidian_glass 8",
+	recipe = {
+			{ "default:obsidian_glass", "default:obsidian_glass", "default:obsidian_glass" },
+			{ "default:obsidian_glass", "default:obsidian_glass", "default:obsidian_glass" },
+			{ "",                       "default:obsidian_glass", "" }
+	},
+})
+
+minetest.register_craft( {
+	output = "basic_signs:sign_wall_glass 3",
+	recipe = {
+			{ "xpanes:pane_flat", "xpanes:pane_flat", "xpanes:pane_flat" },
+			{ "xpanes:pane_flat", "xpanes:pane_flat", "xpanes:pane_flat" },
+			{ "",                 "xpanes:pane_flat", "" }
+	},
+})
+
+minetest.register_craft( {
+	output = "basic_signs:sign_wall_obsidian_glass 3",
+	recipe = {
+			{ "xpanes:obsidian_pane_flat", "xpanes:obsidian_pane_flat", "xpanes:obsidian_pane_flat" },
+			{ "xpanes:obsidian_pane_flat", "xpanes:obsidian_pane_flat", "xpanes:obsidian_pane_flat" },
+			{ "",                       "xpanes:obsidian_pane_flat", "" }
+	},
+})
+

init.lua

@@ -9,7 +9,16 @@ dofile(basic_signs.path .. "/crafting.lua")
 local S, NS = dofile(basic_signs.path .. "/intllib.lua")
 basic_signs.gettext = S
 
+function basic_signs.check_for_floor(pointed_thing)
+	if pointed_thing.above.x == pointed_thing.under.x
+		  and pointed_thing.above.z == pointed_thing.under.z
+		  and pointed_thing.above.y > pointed_thing.under.y then
+		return true
+	end
+end
+
 function basic_signs.determine_sign_type(pos, placer, itemstack, pointed_thing)
+
 	local playername = placer:get_player_name()
 	local pt_name = minetest.get_node(pointed_thing.under).name
 	local node = minetest.get_node(pos)  -- since we're in after-place, this will be the wall sign itself
@@ -19,30 +28,35 @@ function basic_signs.determine_sign_type(pos, placer, itemstack, pointed_thing)
 		return itemstack
 	end
 
+	local newparam2 = minetest.dir_to_facedir(placer:get_look_dir())
+
 	if minetest.registered_nodes[pt_name] and
 	   minetest.registered_nodes[pt_name].on_rightclick and
 	   not placer:get_player_control().sneak then
 		return minetest.registered_nodes[pt_name].on_rightclick(pos, node, placer, itemstack, pointed_thing)
 	elseif signs_lib.check_for_pole(pos, pointed_thing) then
-		minetest.swap_node(pos, {name = "default:sign_wall_wood_onpole", param2 = node.param2})
+		minetest.swap_node(pos, {name = "default:sign_wall_wood_onpole",  param2 = node.param2})
-	else
+	elseif signs_lib.check_for_ceiling(pointed_thing) then
-		local lookdir = placer:get_look_dir()
+		minetest.swap_node(pos, {name = "default:sign_wall_wood_hanging", param2 = newparam2})
-		print(dump(lookdir))
+	elseif basic_signs.check_for_floor(pointed_thing) then
-		local newparam2 = minetest.dir_to_facedir(lookdir)
+		minetest.swap_node(pos, {name = "basic_signs:yard_sign",              param2 = newparam2})
-
-		if node.param2 == 0 then
-			minetest.swap_node(pos, {name = "basic_signs:hanging_sign",  param2 = newparam2})
-		elseif node.param2 == 1 then
-			minetest.swap_node(pos, {name = "basic_signs:yard_sign",     param2 = newparam2})
-		end
-		signs_lib.update_sign(pos)
 	end
+	signs_lib.update_sign(pos)
+
 	if not creative.is_enabled_for(playername) then
 		itemstack:take_item()
 	end
 	return itemstack
 end
 
+local def
+
+local wgroups = table.copy(signs_lib.standard_wood_groups)
+wgroups.not_in_creative_inventory = 1
+
+local sgroups = table.copy(signs_lib.standard_steel_groups)
+sgroups.not_in_creative_inventory = 1
+
 minetest.override_item("default:sign_wall_wood", {
 	after_place_node = basic_signs.determine_sign_type
 })
@@ -56,10 +70,47 @@ signs_lib.register_sign("basic_signs:sign_wall_locked", {
 	inventory_image = "basic_signs_sign_wall_locked_inv.png",
 	locked = true,
 	entity_info = "standard",
+	allow_hanging = true,
+	allow_widefont = true
+})
+
+signs_lib.register_sign("basic_signs:sign_wall_glass", {
+	description = S("Glass Sign"),
+	tiles = {
+		{ name = "basic_signs_sign_wall_glass.png", backface_culling = true},
+		"basic_signs_sign_wall_glass_edges.png",
+	},
+	inventory_image = "basic_signs_sign_wall_glass_inv.png",
+	default_color = "c",
+	locked = true,
+	entity_info = "standard",
+	sounds = default.node_sound_glass_defaults(),
+	groups = {cracky = 3, oddly_breakable_by_hand = 3},
+	allow_hanging = true,
+	allow_widefont = true,
+	use_texture_alpha = true,
+})
+
+signs_lib.register_sign("basic_signs:sign_wall_obsidian_glass", {
+	description = S("Obsidian Glass Sign"),
+	tiles = {
+		{ name = "basic_signs_sign_wall_obsidian_glass.png", backface_culling = true},
+		"basic_signs_sign_wall_obsidian_glass_edges.png",
+	},
+	inventory_image = "basic_signs_sign_wall_obsidian_glass_inv.png",
+	default_color = "c",
+	locked = true,
+	entity_info = "standard",
+	sounds = default.node_sound_glass_defaults(),
+	groups = {cracky = 3},
+	allow_hanging = true,
+	allow_widefont = true,
+	use_texture_alpha = true,
 })
 
 minetest.register_alias("locked_sign:sign_wall_locked", "basic_signs:sign_wall_locked")
 
+
 -- array : color, translated color, default text color
 
 local sign_colors = {
@@ -93,6 +144,8 @@ for i, color in ipairs(sign_colors) do
 			mesh = "signs_lib_standard_wall_sign_entity.obj",
 			yaw = signs_lib.standard_yaw
 		},
+		allow_hanging = true,
+		allow_widefont = true
 	})
 
 	table.insert(signs_lib.lbm_restore_nodes, "signs:sign_wall_"..color[1])
@@ -114,31 +167,11 @@ signs_lib.register_sign("basic_signs:yard_sign", {
 		mesh = "basic_signs_yard_sign_entity.obj",
 		yaw = signs_lib.standard_yaw
 	},
+	groups = wgroups,
 	drop = "default:sign_wall_wood",
-	allow_onpole = false
+	allow_onpole = false,
-})
+	allow_widefont = true
-
-signs_lib.register_sign("basic_signs:hanging_sign", {
-	description = "Wooden sign, hanging",
-	paramtype2 = "facedir",
-	selection_box = signs_lib.make_selection_boxes(35, 32, false, 0, 3, -18.5, true),
-	mesh = "basic_signs_hanging_sign.obj",
-	tiles = {
-		"signs_lib_sign_wall_wooden.png",
-		"signs_lib_sign_wall_wooden_edges.png",
-		"basic_signs_ceiling_hangers.png"
-	},
-	inventory_image = "default_sign_wood.png",
-	entity_info = {
-		mesh = "basic_signs_hanging_sign_entity.obj",
-		yaw = signs_lib.standard_yaw
-	},
-	drop = "default:sign_wall_wood",
-	allow_onpole = false
 })
 
 table.insert(signs_lib.lbm_restore_nodes, "signs:sign_yard")
-table.insert(signs_lib.lbm_restore_nodes, "signs:sign_hanging")
 minetest.register_alias("signs:sign_yard", "basic_signs:yard_sign")
-minetest.register_alias("signs:sign_hanging", "basic_signs:hanging_sign")
-

models/basic_signs_hanging_sign.obj

@@ -1,62 +0,0 @@
-# Blender v2.79 (sub 0) OBJ File: 'basic_signs wooden hanging sign.blend'
-# www.blender.org
-o Cube
-v 0.437500 -0.312500 0.031250
-v 0.437500 -0.312500 -0.031250
-v 0.437500 0.312500 0.031250
-v 0.437500 0.312500 -0.031250
-v -0.437500 -0.312500 0.031250
-v -0.437500 -0.312500 -0.031250
-v -0.437500 0.312500 0.031250
-v -0.437500 0.312500 -0.031250
-v 0.437500 -0.312500 0.031250
-v 0.437500 -0.312500 -0.031250
-v 0.437500 0.312500 0.031250
-v 0.437500 0.312500 -0.031250
-v -0.437500 -0.312500 0.031250
-v -0.437500 -0.312500 -0.031250
-v -0.437500 0.312500 0.031250
-v -0.437500 0.312500 -0.031250
-v 0.500000 0.312500 0.000000
-v 0.500000 0.500000 0.000000
-v -0.500000 0.312500 0.000000
-v -0.500000 0.500000 0.000000
-vt 0.468750 0.812500
-vt 0.031250 0.812500
-vt 0.031250 0.187500
-vt 0.468750 0.187500
-vt 0.531250 0.812500
-vt 0.968750 0.812500
-vt 0.968750 0.187500
-vt 0.531250 0.187500
-vt 0.234375 0.000000
-vt 0.234375 1.000000
-vt 0.015625 1.000000
-vt 0.015625 -0.000000
-vt 0.609375 -0.000000
-vt 0.609375 1.000000
-vt 0.390625 1.000000
-vt 0.390625 -0.000000
-vt 0.765625 0.000000
-vt 0.765625 1.000000
-vt 1.000000 0.812500
-vt 1.000000 1.000000
-vt 0.000000 1.000000
-vt -0.000000 0.812500
-vn 0.0000 0.0000 -1.0000
-vn 0.0000 -0.0000 1.0000
-vn 0.0000 -1.0000 0.0000
-vn 0.0000 1.0000 0.0000
-vn 1.0000 0.0000 0.0000
-vn -1.0000 0.0000 0.0000
-g Cube_Cube_front-back
-s off
-f 8/1/1 4/2/1 2/3/1 6/4/1
-f 3/5/2 7/6/2 5/7/2 1/8/2
-g Cube_Cube_edges
-f 13/9/3 14/10/3 10/11/3 9/12/3
-f 11/13/4 12/14/4 16/15/4 15/16/4
-f 11/13/5 9/17/5 10/18/5 12/14/5
-f 13/9/6 15/16/6 16/15/6 14/10/6
-g Cube_Cube_hangers
-f 19/19/1 20/20/1 18/21/1 17/22/1

models/basic_signs_hanging_sign_entity.obj

@@ -1,15 +0,0 @@
-# Blender v2.79 (sub 0) OBJ File: 'basic_signs wooden hanging sign.blend'
-# www.blender.org
-o Plane
-v 0.406250 -0.281250 -0.042969
-v -0.406250 -0.281250 -0.042969
-v 0.406250 0.281250 -0.042969
-v -0.406250 0.281250 -0.042969
-vt 0.000000 0.000000
-vt 1.000000 0.000000
-vt 1.000000 1.000000
-vt 0.000000 1.000000
-vn 0.0000 -0.0000 -1.0000
-g Plane_Plane_None
-s off
-f 1/1/1 2/2/1 4/3/1 3/4/1