Traitor/mods/furniture/traffic_signs.lua

local function on_construct(pos)
   local meta = minetest.get_meta(pos)
   meta:set_string('formspec', 'field[text;;${text}]')
   meta:set_string('infotext', '')
end

local function on_receive_fields(pos, formname, fields, sender)
   local meta = minetest.get_meta(pos)
   local name = sender:get_player_name()
   if not minetest.is_protected(pos, name) or minetest.check_player_privs(name, { server = true }) then
      if not fields.text then return end
      meta:set_string('text', fields.text)
      meta:set_string('infotext', fields.text)
   end
end

minetest.register_node('furniture:traffic_sign_address_1', {
   description = 'Street Sign (Single)',
   drawtype = 'mesh',
   mesh = 'furniture_street_sign_address_1.obj',
   tiles = {'furniture_traffic_sign_post.png', 'furniture_traffic_sign_streets.png'},
   paramtype = 'light',
   paramtype2 = 'facedir',
   selection_box = {
      type = 'fixed',
      fixed = {{-.0625, -1, -.0625, .0625, 1.5, .0625}, --post
               {-.5, 1.25, -.0625, .5, 1.4375, -.03125}}},
   collision_box = {
      type = 'fixed',
      fixed = {-.0625, -1, -.0625, .0625, 1.5, .0625}},
   groups = {breakable=1},
   on_construct = on_construct,
   on_receive_fields = on_receive_fields
})

minetest.register_node('furniture:traffic_sign_address_2', {
   description = 'Street Sign (Double)',
   drawtype = 'mesh',
   mesh = 'furniture_street_sign_address_2.obj',
   tiles = {'furniture_traffic_sign_post.png', 'furniture_traffic_sign_streets.png'},
   paramtype = 'light',
   paramtype2 = 'facedir',
   selection_box = {
      type = 'fixed',
      fixed = {{-.0625, -1, -.0625, .0625, 1.5, .0625},
               {-.5, 1.25, -.0625, .5, 1.4375, -.03125}}},
   collision_box = {
      type = 'fixed',
      fixed = {-.0625, -1, -.0625, .0625, 1.5, .0625}},
   groups = {breakable=1},
   on_construct = on_construct,
   after_place_node = function(pos, placer)
      local node = minetest.get_node(pos)
      local above_pos = {x=pos.x, y=pos.y+1, z=pos.z}
      minetest.set_node(above_pos, {name = 'furniture:traffic_sign_address_hidden', param2 = node.param2})
   end,
   on_receive_fields = on_receive_fields,
   on_destruct = function(pos)
      local above_pos = {x=pos.x, y=pos.y+1, z=pos.z}
      minetest.remove_node(above_pos)
   end,
})

minetest.register_node('furniture:traffic_sign_address_hidden', {
   drawtype = 'airlike',
   paramtype2 = 'facedir',
   selection_box = {
      type = 'fixed',
      fixed = {.0625, .0625, -.5, .03125, .25, .5}},
   drop = 'furniture:traffic_sign_address_2',
   groups = {breakable=1, not_in_creative_inventory=1},
   on_construct = on_construct,
   on_receive_fields = on_receive_fields,
   on_destruct = function(pos)
      local below_pos = {x=pos.x, y=pos.y-1, z=pos.z}
      minetest.remove_node(below_pos)
   end,
})

minetest.register_node('furniture:traffic_sign_stop', {
   description = 'Stop Sign',
   drawtype = 'mesh',
   mesh = 'furniture_traffic_sign_stop.obj',
   tiles = {'furniture_traffic_sign_post.png', 'furniture_traffic_sign_stop.png'},
   paramtype = 'light',
   paramtype2 = 'facedir',
   selection_box = {
      type = 'fixed',
      fixed = {{-.0625, -1, -.0625, .0625, 1.5, .0625},
               {-.5, .5, -.0625, .5, 1.5, -.03125}}},
   collision_box = {
      type = 'fixed',
      fixed = {-.0625, -1, -.0625, .0625, 1.5, .0625}},
   groups = {breakable=1},
})

minetest.register_node('furniture:traffic_sign_speed_55', {
   description = 'Speed Limit 55',
   drawtype = 'mesh',
   mesh = 'furniture_traffic_sign_speed.obj',
   tiles = {'furniture_traffic_sign_post.png', 'furniture_traffic_sign_speed_55.png'},
   paramtype = 'light',
   paramtype2 = 'facedir',
   selection_box = {
      type = 'fixed',
      fixed = {{-.0625, -1, -.0625, .0625, 1.5, .0625},
               {-.5, .5, -.0625, .5, 1.5, -.03125}}},
   collision_box = {
      type = 'fixed',
      fixed = {-.0625, -1, -.0625, .0625, 1.5, .0625}},
   groups = {breakable=1},
})

minetest.register_node('furniture:traffic_sign_no_parking', {
   description = 'No Parking',
   drawtype = 'mesh',
   mesh = 'furniture_traffic_sign_speed.obj',
   tiles = {'furniture_traffic_sign_post.png', 'furniture_traffic_sign_no_parking.png'},
   paramtype = 'light',
   paramtype2 = 'facedir',
   selection_box = {
      type = 'fixed',
      fixed = {{-.0625, -1, -.0625, .0625, 1.5, .0625},
               {-.5, .5, -.0625, .5, 1.5, -.03125}}},
   collision_box = {
      type = 'fixed',
      fixed = {-.0625, -1, -.0625, .0625, 1.5, .0625}},
   groups = {breakable=1},
})

minetest.register_node('furniture:traffic_sign_one_way', {
   description = 'One Way',
   drawtype = 'mesh',
   mesh = 'furniture_traffic_sign_speed.obj',
   tiles = {'furniture_traffic_sign_post.png', 'furniture_traffic_sign_one_way.png'},
   paramtype = 'light',
   paramtype2 = 'facedir',
   selection_box = {
      type = 'fixed',
      fixed = {{-.0625, -1, -.0625, .0625, 1.5, .0625},
               {-.5, .5, -.0625, .5, 1.5, -.03125}}},
   collision_box = {
      type = 'fixed',
      fixed = {-.0625, -1, -.0625, .0625, 1.5, .0625}},
   groups = {breakable=1},
})

minetest.register_node('furniture:traffic_sign_slow', {
   description = 'One Way',
   drawtype = 'mesh',
   mesh = 'furniture_traffic_sign_warning.obj',
   tiles = {'furniture_traffic_sign_post.png', 'furniture_traffic_sign_slow.png'},
   paramtype = 'light',
   paramtype2 = 'facedir',
   selection_box = {
      type = 'fixed',
      fixed = {{-.0625, -1, -.0625, .0625, 1.5, .0625},
               {-.5, .5, -.0625, .5, 1.5, -.03125}}},
   collision_box = {
      type = 'fixed',
      fixed = {-.0625, -1, -.0625, .0625, 1.5, .0625}},
   groups = {breakable=1},
})