VoxeLibre/mods/signs/init.lua

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-- Font: 04.jp.org
-- load characters map
local chars_file = io.open(minetest.get_modpath("signs").."/characters", "r")
local charmap = {}
local max_chars = 16
if not chars_file then
print("[signs] E: character map file not found")
else
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
end
local signs = {
{delta = {x = 0, y = 0, z = 0.399}, yaw = 0},
{delta = {x = 0.399, y = 0, z = 0}, yaw = math.pi / -2},
{delta = {x = 0, y = 0, z = -0.399}, yaw = math.pi},
{delta = {x = -0.399, y = 0, z = 0}, yaw = math.pi / 2},
}
local signs_yard = {
{delta = {x = 0, y = 0, z = -0.05}, yaw = 0},
{delta = {x = -0.05, y = 0, z = 0}, yaw = math.pi / -2},
{delta = {x = 0, y = 0, z = 0.05}, yaw = math.pi},
{delta = {x = 0.05, y = 0, z = 0}, yaw = math.pi / 2},
}
local sign_groups = {choppy=2, dig_immediate=2}
local construct_sign = function(pos)
local meta = minetest.get_meta(pos)
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meta:set_string("formspec", "field[text;;${text}]")
meta:set_string("infotext", "")
end
local destruct_sign = function(pos)
local objects = minetest.get_objects_inside_radius(pos, 0.5)
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for _, v in ipairs(objects) do
if v:get_entity_name() == "signs:text" then
v:remove()
end
end
end
local update_sign = function(pos, fields, sender)
local meta = minetest.get_meta(pos)
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local owner = meta:get_string("owner")
meta:set_string("infotext", "")
local text = meta:get_string("text")
if fields and sender:get_player_name() == owner or text == "" and fields then
meta:set_string("text", fields.text)
meta:set_string("owner", sender:get_player_name() or "")
end
text = meta:get_string("text")
local objects = minetest.get_objects_inside_radius(pos, 0.5)
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for _, v in ipairs(objects) do
if v:get_entity_name() == "signs:text" then
v:set_properties({textures={generate_texture(create_lines(text))}})
return
end
end
-- if there is no entity
local sign_info
if minetest.get_node(pos).name == "signs:sign_yard" then
sign_info = signs_yard[minetest.get_node(pos).param2 + 1]
elseif minetest.get_node(pos).name == "signs:sign_wall" then
sign_info = signs[minetest.get_node(pos).param2 + 1]
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end
if sign_info == nil then
return
end
local text = minetest.add_entity({x = pos.x + sign_info.delta.x,
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y = pos.y + sign_info.delta.y,
z = pos.z + sign_info.delta.z}, "signs:text")
text:setyaw(sign_info.yaw)
end
minetest.register_node("signs:sign_wall", {
description = "Sign",
inventory_image = "default_sign_wall.png",
walkable = false,
is_ground_content = false,
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wield_image = "default_sign_wall.png",
node_placement_prediction = "",
paramtype = "light",
sunlight_propagates = true,
paramtype2 = "facedir",
drawtype = "nodebox",
node_box = {type = "fixed", fixed = {-0.45, -0.15, 0.4, 0.45, 0.45, 0.498}},
selection_box = {type = "fixed", fixed = {-0.45, -0.15, 0.4, 0.45, 0.45, 0.498}},
tiles = {"signs_top.png", "signs_bottom.png", "signs_side.png", "signs_side.png", "signs_back.png", "signs_front.png"},
groups = sign_groups,
on_place = function(itemstack, placer, pointed_thing)
local above = pointed_thing.above
local under = pointed_thing.under
local dir = {x = under.x - above.x,
y = under.y - above.y,
z = under.z - above.z}
local wdir = minetest.dir_to_wallmounted(dir)
local placer_pos = placer:getpos()
if placer_pos then
dir = {
x = above.x - placer_pos.x,
y = above.y - placer_pos.y,
z = above.z - placer_pos.z
}
end
local fdir = minetest.dir_to_facedir(dir)
local sign_info
if wdir == 0 then
--how would you add sign to ceiling?
minetest.add_item(above, "signs:sign_wall")
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itemstack:take_item()
return itemstack
elseif wdir == 1 then
minetest.add_node(above, {name = "signs:sign_yard", param2 = fdir})
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sign_info = signs_yard[fdir + 1]
else
minetest.add_node(above, {name = "signs:sign_wall", param2 = fdir})
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sign_info = signs[fdir + 1]
end
local text = minetest.add_entity({x = above.x + sign_info.delta.x,
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y = above.y + sign_info.delta.y,
z = above.z + sign_info.delta.z}, "signs:text")
text:setyaw(sign_info.yaw)
itemstack:take_item()
return itemstack
end,
on_construct = function(pos)
construct_sign(pos)
end,
on_destruct = function(pos)
destruct_sign(pos)
end,
on_receive_fields = function(pos, formname, fields, sender)
update_sign(pos, fields, sender)
end,
on_punch = function(pos, node, puncher)
update_sign(pos)
end,
})
minetest.register_node("signs:sign_yard", {
paramtype = "light",
sunlight_propagates = true,
walkable = false,
is_ground_content = false,
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paramtype2 = "facedir",
drawtype = "nodebox",
node_box = {type = "fixed", fixed = {
{-0.45, -0.15, -0.049, 0.45, 0.45, 0.049},
{-0.05, -0.5, -0.049, 0.05, -0.15, 0.049}
}},
selection_box = {type = "fixed", fixed = {-0.45, -0.15, -0.049, 0.45, 0.45, 0.049}},
tiles = {"signs_top.png", "signs_bottom.png", "signs_side.png", "signs_side.png", "signs_back.png", "signs_front.png"},
groups = {choppy=2, dig_immediate=2},
drop = "signs:sign_wall",
on_construct = function(pos)
construct_sign(pos)
end,
on_destruct = function(pos)
destruct_sign(pos)
end,
on_receive_fields = function(pos, formname, fields, sender)
update_sign(pos, fields, sender)
end,
on_punch = function(pos, node, puncher)
update_sign(pos)
end,
})
minetest.register_entity("signs:text", {
collisionbox = { 0, 0, 0, 0, 0, 0 },
visual = "upright_sprite",
textures = {},
on_activate = function(self)
local meta = minetest.get_meta(self.object:getpos())
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local text = meta:get_string("text")
self.object:set_properties({textures={generate_texture(create_lines(text))}})
end
})
-- CONSTANTS
local SIGN_WITH = 110
local SIGN_PADDING = 8
local LINE_LENGTH = 16
local NUMBER_OF_LINES = 4
local LINE_HEIGHT = 14
local CHAR_WIDTH = 5
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
string_to_word_array = function(str)
local tab = {}
local current = 1
tab[1] = ""
for _,char in ipairs(string_to_array(str)) do
if char ~= " " then
tab[current] = tab[current]..char
else
current = current+1
tab[current] = ""
end
end
return tab
end
create_lines = function(text)
local line = ""
local line_num = 1
local tab = {}
for _,word in ipairs(string_to_word_array(text)) do
if string.len(line)+string.len(word) < LINE_LENGTH and word ~= "|" then
if line ~= "" then
line = line.." "..word
else
line = word
end
else
table.insert(tab, line)
if word ~= "|" then
line = word
else
line = ""
end
line_num = line_num+1
if line_num > NUMBER_OF_LINES then
return tab
end
end
end
table.insert(tab, line)
return tab
end
generate_texture = function(lines)
local texture = "[combine:"..SIGN_WITH.."x"..SIGN_WITH
local ypos = 12
for i = 1, #lines do
texture = texture..generate_line(lines[i], ypos)
ypos = ypos + LINE_HEIGHT
end
return texture
end
generate_line = function(s, ypos)
local i = 1
local parsed = {}
local width = 0
local chars = 0
while chars < max_chars and i <= #s do
local file = nil
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
print("[signs] W: unknown symbol in '"..s.."' at "..i.." (probably "..s:sub(i, i)..")")
i = i + 1
end
if file ~= nil then
width = width + CHAR_WIDTH
table.insert(parsed, file)
chars = chars + 1
end
end
width = width - 1
local texture = ""
local xpos = math.floor((SIGN_WITH - 2 * SIGN_PADDING - width) / 2 + SIGN_PADDING)
for i = 1, #parsed do
texture = texture..":"..xpos..","..ypos.."="..parsed[i]..".png"
xpos = xpos + CHAR_WIDTH + 1
end
return texture
end
if minetest.setting_get("log_mods") then
minetest.log("action", "signs loaded")
end
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minetest.register_craft({
type = "fuel",
recipe = "signs:sign_wall",
burntime = 10,
})