Mineclonia/mods/ITEMS/mcl_signs/init.lua

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local S = minetest.get_translator("mcl_signs")
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local F = minetest.formspec_escape
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-- Font: 04.jp.org
-- load characters map
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local chars_file = io.open(minetest.get_modpath("mcl_signs").."/characters.txt", "r")
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-- FIXME: Support more characters (many characters are missing)
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local charmap = {}
if not chars_file then
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minetest.log("error", "[mcl_signs] : character map file not found")
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else
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while true do
local char = chars_file:read("*l")
if char == nil then
break
end
local img = chars_file:read("*l")
chars_file:read("*l")
charmap[char] = img
end
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end
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-- CONSTANTS
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local SIGN_WIDTH = 115
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local LINE_LENGTH = 15
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local NUMBER_OF_LINES = 4
local LINE_HEIGHT = 14
local CHAR_WIDTH = 5
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-- Helper functions
local function round(num, idp)
local mult = 10^(idp or 0)
return math.floor(num * mult + 0.5) / mult
end
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local string_to_array = function(str)
local tab = {}
for i=1,string.len(str) do
table.insert(tab, string.sub(str, i,i))
end
return tab
end
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local string_to_line_array = function(str)
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local tab = {}
local current = 1
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local linechar = 1
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tab[1] = ""
for _,char in ipairs(string_to_array(str)) do
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-- New line
if char == "\n" then
current = current + 1
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tab[current] = ""
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linechar = 1
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else
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tab[current] = tab[current]..char
linechar = linechar + 1
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end
end
return tab
end
local create_lines = function(text)
local line_num = 1
local tab = {}
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for _, line in ipairs(string_to_line_array(text)) do
if line_num > NUMBER_OF_LINES then
break
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end
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table.insert(tab, line)
line_num = line_num + 1
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end
return tab
end
local generate_line = function(s, ypos)
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local i = 1
local parsed = {}
local width = 0
local chars = 0
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local printed_char_width = CHAR_WIDTH + 1
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while chars < LINE_LENGTH and i <= #s do
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local file = nil
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-- Get and render character
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if charmap[s:sub(i, i)] ~= nil then
file = charmap[s:sub(i, i)]
i = i + 1
elseif i < #s and charmap[s:sub(i, i + 1)] ~= nil then
file = charmap[s:sub(i, i + 1)]
i = i + 2
else
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-- No character image found.
-- Use replacement character:
file = "_rc"
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i = i + 1
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minetest.log("verbose", "[mcl_signs] Unknown symbol in '"..s.."' at "..i)
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end
if file ~= nil then
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width = width + printed_char_width
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table.insert(parsed, file)
chars = chars + 1
end
end
width = width - 1
local texture = ""
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local xpos = math.floor((SIGN_WIDTH - width) / 2)
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for i = 1, #parsed do
texture = texture..":"..xpos..","..ypos.."="..parsed[i]..".png"
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xpos = xpos + printed_char_width
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end
return texture
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end
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local generate_texture = function(lines, signnodename)
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local texture = "[combine:"..SIGN_WIDTH.."x"..SIGN_WIDTH
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local ypos
if signnodename == "mcl_signs:wall_sign" then
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ypos = 30
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else
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ypos = 0
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end
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for i = 1, #lines do
texture = texture..generate_line(lines[i], ypos)
ypos = ypos + LINE_HEIGHT
end
return texture
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end
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local n = 23/56 - 1/128
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local signtext_info_wall = {
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{delta = {x = 0, y = 0, z = n}, yaw = 0},
{delta = {x = n, y = 0, z = 0}, yaw = math.pi / -2},
{delta = {x = 0, y = 0, z = -n}, yaw = math.pi},
{delta = {x = -n, y = 0, z = 0}, yaw = math.pi / 2},
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}
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local signtext_info_standing = {}
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local m = -1/16 + 1/64
for rot=0, 15 do
local yaw = math.pi*2 - (((math.pi*2) / 16) * rot)
local delta = vector.multiply(minetest.yaw_to_dir(yaw), m)
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-- Offset because sign is a bit above node boundaries
delta.y = delta.y + 2/28
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table.insert(signtext_info_standing, { delta = delta, yaw = yaw })
end
local function get_rotation_level(facedir, nodename)
local rl = facedir * 4
if nodename == "mcl_signs:standing_sign22_5" then
rl = rl + 1
elseif nodename == "mcl_signs:standing_sign45" then
rl = rl + 2
elseif nodename == "mcl_signs:standing_sign67_5" then
rl = rl + 3
end
return rl
end
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local function get_wall_signtext_info(param2, nodename)
local dir = minetest.wallmounted_to_dir(param2)
if dir.x > 0 then
return 2
elseif dir.z > 0 then
return 1
elseif dir.x < 0 then
return 4
else
return 3
end
end
local sign_groups = {handy=1,axey=1, flammable=1, deco_block=1, material_wood=1, attached_node=1, dig_by_piston=1}
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local destruct_sign = function(pos)
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local objects = minetest.get_objects_inside_radius(pos, 0.5)
for _, v in ipairs(objects) do
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local ent = v:get_luaentity()
if ent and ent.name == "mcl_signs:text" then
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v:remove()
end
end
local players = minetest.get_connected_players()
for p=1, #players do
minetest.close_formspec(players[p]:get_player_name(), "mcl_signs:set_text_"..pos.x.."_"..pos.y.."_"..pos.z)
end
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end
local update_sign = function(pos, fields, sender)
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local meta = minetest.get_meta(pos)
if not meta then
return
end
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local text = meta:get_string("text")
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if fields and (text == "" and fields.text) then
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meta:set_string("text", fields.text)
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text = fields.text
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end
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if text == nil then
text = ""
end
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local objects = minetest.get_objects_inside_radius(pos, 0.5)
for _, v in ipairs(objects) do
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local ent = v:get_luaentity()
if ent and ent.name == "mcl_signs:text" then
v:set_properties({textures={generate_texture(create_lines(text), ent._signnodename)}})
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return
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end
end
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-- if there is no entity
local sign_info
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local n = minetest.get_node(pos)
local nn = n.name
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if nn == "mcl_signs:standing_sign" or nn == "mcl_signs:standing_sign22_5" or nn == "mcl_signs:standing_sign45" or nn == "mcl_signs:standing_sign67_5" then
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sign_info = signtext_info_standing[get_rotation_level(n.param2, nn) + 1]
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elseif nn == "mcl_signs:wall_sign" then
sign_info = signtext_info_wall[get_wall_signtext_info(n.param2)]
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end
if sign_info == nil then
return
end
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local text_entity = minetest.add_entity({
x = pos.x + sign_info.delta.x,
y = pos.y + sign_info.delta.y,
z = pos.z + sign_info.delta.z}, "mcl_signs:text")
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text_entity:get_luaentity()._signnodename = nn
text_entity:set_properties({textures={generate_texture(create_lines(text), nn)}})
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text_entity:set_yaw(sign_info.yaw)
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end
local show_formspec = function(player, pos)
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minetest.show_formspec(
player:get_player_name(),
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"mcl_signs:set_text_"..pos.x.."_"..pos.y.."_"..pos.z,
"size[6,3]textarea[0.25,0.25;6,1.5;text;"..F(S("Enter sign text:"))..";]label[0,1.5;"..F(S("Maximum line length: 15")).."\n"..F(S("Maximum lines: 4")).."]button_exit[0,2.5;6,1;submit;"..F(S("Done")).."]"
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)
end
minetest.register_on_player_receive_fields(function(player, formname, fields)
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if formname:find("mcl_signs:set_text_") == 1 then
local x, y, z = formname:match("mcl_signs:set_text_(.-)_(.-)_(.*)")
local pos = {x=tonumber(x), y=tonumber(y), z=tonumber(z)}
if not pos or not pos.x or not pos.y or not pos.z then return end
update_sign(pos, fields, player)
end
end)
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local node_sounds
if minetest.get_modpath("mcl_sounds") then
node_sounds = mcl_sounds.node_sound_wood_defaults()
end
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minetest.register_node("mcl_signs:wall_sign", {
description = S("Sign"),
_doc_items_longdesc = S("Signs can be written and come in two variants: Wall sign and sign on a sign post. Signs can be placed on the top and the sides of other blocks, but not below them."),
_doc_items_usagehelp = S("After placing the sign, you can write something on it. You have 4 lines of text with up to 15 characters for each line; anything beyond these limits is lost. Not all characters are supported. The text can not be changed once it has been written; you have to break and place the sign again."),
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inventory_image = "default_sign.png",
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walkable = false,
is_ground_content = false,
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wield_image = "default_sign.png",
node_placement_prediction = "",
paramtype = "light",
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sunlight_propagates = true,
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paramtype2 = "wallmounted",
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drawtype = "mesh",
mesh = "mcl_signs_signonwallmount.obj",
selection_box = {type = "wallmounted", wall_side = {-0.5, -7/28, -0.5, -23/56, 7/28, 0.5}},
tiles = {"mcl_signs_sign.png"},
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groups = sign_groups,
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stack_max = 16,
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sounds = node_sounds,
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on_place = function(itemstack, placer, pointed_thing)
local above = pointed_thing.above
local under = pointed_thing.under
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-- Use pointed node's on_rightclick function first, if present
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local node_under = minetest.get_node(under)
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if placer and not placer:get_player_control().sneak then
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if minetest.registered_nodes[node_under.name] and minetest.registered_nodes[node_under.name].on_rightclick then
return minetest.registered_nodes[node_under.name].on_rightclick(under, node_under, placer, itemstack) or itemstack
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end
end
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local dir = vector.subtract(under, above)
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-- Only build when it's legal
local abovenodedef = minetest.registered_nodes[minetest.get_node(above).name]
if not abovenodedef or abovenodedef.buildable_to == false then
return itemstack
end
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local wdir = minetest.dir_to_wallmounted(dir)
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local placer_pos = placer:get_pos()
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local fdir = minetest.dir_to_facedir(dir)
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local sign_info
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local nodeitem = ItemStack(itemstack)
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-- Ceiling
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if wdir == 0 then
--how would you add sign to ceiling?
return itemstack
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-- Floor
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elseif wdir == 1 then
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-- Standing sign
-- Determine the sign rotation based on player's yaw
local yaw = math.pi*2 - placer:get_look_horizontal()
-- Select one of 16 possible rotations (0-15)
local rotation_level = round((yaw / (math.pi*2)) * 16)
if rotation_level > 15 then
rotation_level = 0
elseif rotation_level < 0 then
rotation_level = 15
end
-- The actual rotation is a combination of predefined mesh and facedir (see node definition)
if rotation_level % 4 == 0 then
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nodeitem:set_name("mcl_signs:standing_sign")
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elseif rotation_level % 4 == 1 then
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nodeitem:set_name("mcl_signs:standing_sign22_5")
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elseif rotation_level % 4 == 2 then
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nodeitem:set_name("mcl_signs:standing_sign45")
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elseif rotation_level % 4 == 3 then
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nodeitem:set_name("mcl_signs:standing_sign67_5")
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end
fdir = math.floor(rotation_level / 4)
-- Place the node!
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local _, success = minetest.item_place_node(nodeitem, placer, pointed_thing, fdir)
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if not success then
return itemstack
end
if not minetest.settings:get_bool("creative_mode") then
itemstack:take_item()
end
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sign_info = signtext_info_standing[rotation_level + 1]
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-- Side
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else
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-- Wall sign
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local _, success = minetest.item_place_node(itemstack, placer, pointed_thing, wdir)
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if not success then
return itemstack
end
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sign_info = signtext_info_wall[fdir + 1]
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end
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-- Determine spawn position of entity
local place_pos
if minetest.registered_nodes[node_under.name].buildable_to then
place_pos = under
else
place_pos = above
end
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local text_entity = minetest.add_entity({
x = place_pos.x + sign_info.delta.x,
y = place_pos.y + sign_info.delta.y,
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z = place_pos.z + sign_info.delta.z}, "mcl_signs:text")
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text_entity:set_yaw(sign_info.yaw)
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text_entity:get_luaentity()._signnodename = nodeitem:get_name()
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minetest.sound_play({name="default_place_node_hard", gain=1.0}, {pos = place_pos})
show_formspec(placer, place_pos)
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return itemstack
end,
on_destruct = destruct_sign,
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on_punch = function(pos, node, puncher)
update_sign(pos)
end,
_mcl_hardness = 1,
_mcl_blast_resistance = 5,
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})
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local on_rotate
if minetest.get_modpath("screwdriver") then
on_rotate = screwdriver.disallow
end
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-- Standing sign nodes.
-- 4 rotations at 0°, 22.5°, 45° and 67.5°.
-- These are 4 out of 16 possible rotations.
-- With facedir the remaining 12 rotations are constructed.
-- 0°
local ssign = {
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paramtype = "light",
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sunlight_propagates = true,
walkable = false,
is_ground_content = false,
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paramtype2 = "facedir",
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drawtype = "mesh",
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mesh = "mcl_signs_sign.obj",
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selection_box = {type = "fixed", fixed = {-0.2, -0.5, -0.2, 0.2, 0.5, 0.2}},
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tiles = {"mcl_signs_sign.png"},
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groups = sign_groups,
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drop = "mcl_signs:wall_sign",
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stack_max = 16,
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sounds = node_sounds,
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on_destruct = destruct_sign,
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on_punch = function(pos, node, puncher)
update_sign(pos)
end,
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on_rotate = on_rotate,
_mcl_hardness = 1,
_mcl_blast_resistance = 5,
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}
-- 22.5°
minetest.register_node("mcl_signs:standing_sign", ssign)
local ssign22_5 = table.copy(ssign)
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ssign22_5.mesh = "mcl_signs_sign22.5.obj"
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-- 45°
minetest.register_node("mcl_signs:standing_sign22_5", ssign22_5)
local ssign45 = table.copy(ssign)
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ssign45.mesh = "mcl_signs_sign45.obj"
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minetest.register_node("mcl_signs:standing_sign45", ssign45)
-- 67.5°
local ssign67 = table.copy(ssign)
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ssign67.mesh = "mcl_signs_sign67.5.obj"
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minetest.register_node("mcl_signs:standing_sign67_5", ssign67)
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-- FIXME: Prevent entity destruction by /clearobjects
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minetest.register_entity("mcl_signs:text", {
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pointable = false,
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visual = "upright_sprite",
textures = {},
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physical = false,
collide_with_objects = false,
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_signnodename = nil, -- node name of sign node to which the text belongs
on_activate = function(self, staticdata)
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if staticdata ~= nil and staticdata ~= "" then
local des = minetest.deserialize(staticdata)
if des then
self._signnodename = des._signnodename
end
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end
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local meta = minetest.get_meta(self.object:get_pos())
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local text = meta:get_string("text")
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self.object:set_properties({
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textures={generate_texture(create_lines(text), self._signnodename)},
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})
self.object:set_armor_groups({ immortal = 1 })
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end,
get_staticdata = function(self)
local out = { _signnodename = self._signnodename }
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return minetest.serialize(out)
end,
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})
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minetest.register_craft({
type = "fuel",
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recipe = "mcl_signs:wall_sign",
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burntime = 10,
})
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if minetest.get_modpath("mcl_core") then
minetest.register_craft({
output = 'mcl_signs:wall_sign 3',
recipe = {
{'group:wood', 'group:wood', 'group:wood'},
{'group:wood', 'group:wood', 'group:wood'},
{'', 'mcl_core:stick', ''},
}
})
end
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if minetest.get_modpath("doc") then
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doc.add_entry_alias("nodes", "mcl_signs:wall_sign", "nodes", "mcl_signs:standing_sign")
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doc.add_entry_alias("nodes", "mcl_signs:wall_sign", "nodes", "mcl_signs:standing_sign22_5")
doc.add_entry_alias("nodes", "mcl_signs:wall_sign", "nodes", "mcl_signs:standing_sign45")
doc.add_entry_alias("nodes", "mcl_signs:wall_sign", "nodes", "mcl_signs:standing_sign67_5")
end
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minetest.register_alias("signs:sign_wall", "mcl_signs:wall_sign")
minetest.register_alias("signs:sign_yard", "mcl_signs:standing_sign")
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minetest.register_lbm({
name = "mcl_signs:respawn_entities",
label = "Respawn sign text entities",
run_at_every_load = true,
nodenames = { "mcl_signs:wall_sign", "mcl_signs:standing_sign", "mcl_signs:standing_sign22_5", "mcl_signs:standing_sign45", "mcl_signs:standing_sign67_5" },
action = function(pos, node)
update_sign(pos)
end,
})
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if minetest.settings:get_bool("log_mods") then
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minetest.log("action", "[mcl_signs] loaded")
end