Allow floor/ceiling sign to rotate by 90°

mods/default/sign.lua

@@ -2,6 +2,38 @@ local S = minetest.get_translator("default")
 
 local SIGN_MAX_TEXT_LENGTH = 64
 
+local on_construct = function(pos)
+   local meta = minetest.get_meta(pos)
+   meta:set_string("formspec", default.ui.get_page("default:field"))
+   -- Show empty sign text in quotation marks
+   meta:set_string("infotext", S('""'))
+   meta:set_string("text", "")
+end
+local on_receive_fields = function(pos, formname, fields, sender)
+   if fields.text == nil then return end
+   if minetest.is_protected(pos, sender:get_player_name()) and
+                  not minetest.check_player_privs(sender, "protection_bypass") then
+           minetest.record_protection_violation(pos, sender:get_player_name())
+           return itemstack
+   end
+   local meta = minetest.get_meta(pos)
+   local text = fields.text
+   if string.len(text) > SIGN_MAX_TEXT_LENGTH then
+       text = string.sub(text, 1, SIGN_MAX_TEXT_LENGTH)
+   end
+   minetest.log("action", (sender:get_player_name() or "")..
+                   " wrote \""..text.."\" to sign at "..
+                   minetest.pos_to_string(pos))
+   meta:set_string("text", text)
+   -- Show sign text in quotation marks
+   meta:set_string("infotext", S('"@1"', text))
+
+   default.write_name(pos, meta:get_string("text"))
+end
+local on_destruct = function(pos)
+   default.write_name(pos, "")
+end
+
 minetest.register_node(
    "default:sign",
    {
@@ -24,37 +56,57 @@ minetest.register_node(
       groups = {choppy = 2,handy = 2,attached_node = 1},
       is_ground_content = false,
       sounds = default.node_sound_defaults(),
-      on_construct = function(pos)
-         --local n = minetest.get_node(pos)
-         local meta = minetest.get_meta(pos)
-         meta:set_string("formspec", default.ui.get_page("default:field"))
-         -- Show empty sign text in quotation marks
-         meta:set_string("infotext", S('""'))
-         meta:set_string("text", "")
-      end,
-      on_receive_fields = function(pos, formname, fields, sender)
-         if fields.text == nil then return end
-         if minetest.is_protected(pos, sender:get_player_name()) and
-                        not minetest.check_player_privs(sender, "protection_bypass") then
-                 minetest.record_protection_violation(pos, sender:get_player_name())
-                 return itemstack
-         end
-         local meta = minetest.get_meta(pos)
-         local text = fields.text
-         if string.len(text) > SIGN_MAX_TEXT_LENGTH then
-             text = string.sub(text, 1, SIGN_MAX_TEXT_LENGTH)
-         end
-         minetest.log("action", (sender:get_player_name() or "")..
-                         " wrote \""..text.."\" to sign at "..
-                         minetest.pos_to_string(pos))
-         meta:set_string("text", text)
-         -- Show sign text in quotation marks
-         meta:set_string("infotext", S('"@1"', text))
+      on_construct = on_construct,
+      on_receive_fields = on_receive_fields,
+      on_destruct = on_destruct,
+      on_place = function(itemstack, placer, pointed_thing)
+	if not placer or not placer:is_player() then
+          return itemstack
+        end
+        if pointed_thing.type ~= "node" then
+	  return minetest.item_place_node(itemstack, placer, pointed_thing)
+	end
+	if pointed_thing.under.y == pointed_thing.above.y then
+	  return minetest.item_place_node(itemstack, placer, pointed_thing)
+        end
 
-         default.write_name(pos, meta:get_string("text"))
+	local r90 = false
+        local yaw = placer:get_look_horizontal()
+	if not ((yaw > (1/4)*math.pi and yaw < (3/4)*math.pi) or (yaw > (5/4)*math.pi and yaw < (7/4)*math.pi)) then
+	  return minetest.item_place_node(itemstack, placer, pointed_thing)
+        end
+	local r90sign = ItemStack("default:sign90")
+	r90sign = minetest.item_place_node(r90sign, placer, pointed_thing)
+	if r90sign:is_empty() then
+	  itemstack:take_item()
+	end
+	return itemstack
       end,
-      on_destruct = function(pos)
-         default.write_name(pos, "")
-      end
+})
+
+minetest.register_node(
+   "default:sign90",
+   {
+      drawtype = "nodebox",
+      tiles = {"default_sign.png^[transformR90"},
+      inventory_image = "default_sign_inventory.png^[transformR90",
+      wield_image = "default_sign_inventory.png^[transformR90",
+      paramtype = "light",
+      paramtype2 = "wallmounted",
+      sunlight_propagates = true,
+      walkable = false,
+      node_box = {
+	 type = "wallmounted",
+	 wall_top = {-0.5+(4/16), 0.5, -0.5+(1/16), 0.5-(4/16), 0.5-(1/16), 0.5-(1/16)},
+	 wall_bottom = {-0.5+(4/16), -0.5, -0.5+(1/16), 0.5-(4/16), -0.5+(1/16), 0.5-(1/16)},
+	 wall_side = {-0.5, -0.5+(1/16), -0.5+(4/16), -0.5+(1/16), 0.5-(1/16), 0.5-(4/16)},
+      },
+      groups = {choppy = 2,handy = 2,attached_node = 1, not_in_creative_inventory=1},
+      is_ground_content = false,
+      sounds = default.node_sound_defaults(),
+      on_construct = on_construct,
+      on_receive_fields = on_receive_fields,
+      on_destruct = on_destruct,
+      drop = "default:sign",
 })