VoxeLibre/mods/ITEMS/mcl_maps/init.lua

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mcl_maps = {}
local S = minetest.get_translator("mcl_maps")
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local storage = minetest.get_mod_storage()
local modpath = minetest.get_modpath("mcl_maps")
local worldpath = minetest.get_worldpath()
local map_textures_path = worldpath .. "/mcl_maps/"
local last_finished_id = storage:get_int("next_id") - 1
minetest.mkdir(map_textures_path)
local function load_json_file(name)
local file = assert(io.open(modpath .. "/" .. name .. ".json", "r"))
local data = minetest.parse_json(file:read())
file:close()
return data
end
local texture_colors = load_json_file("colors")
local palettes = load_json_file("palettes")
local color_cache = {}
local creating_maps = {}
local loading_maps = {}
local loaded_maps = {}
local c_air = minetest.get_content_id("air")
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function mcl_maps.create_map(pos)
local itemstack = ItemStack("mcl_maps:filled_map")
local meta = itemstack:get_meta()
local id = storage:get_int("next_id")
storage:set_int("next_id", id + 1)
local texture_file = "mcl_maps_map_texture_" .. id .. ".tga"
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local texture_path = map_textures_path .. texture_file
local texture = "[combine:140x140:0,0=mcl_maps_map_background.png:6,6=" .. texture_file
meta:set_int("mcl_maps:id", id)
meta:set_string("mcl_maps:texture", texture)
meta:set_string("mcl_maps:texture_path", texture_path)
tt.reload_itemstack_description(itemstack)
creating_maps[texture] = true
local minp = vector.multiply(vector.floor(vector.divide(pos, 128)), 128)
local maxp = vector.add(minp, vector.new(127, 127, 127))
minetest.emerge_area(minp, maxp, function(blockpos, action, calls_remaining)
if calls_remaining > 0 then
return
end
local vm = minetest.get_voxel_manip()
local emin, emax = vm:read_from_map(minp, maxp)
local data = vm:get_data()
local param2data = vm:get_param2_data()
local area = VoxelArea:new({MinEdge = emin, MaxEdge = emax})
local pixels = {}
local last_heightmap
for x = 1, 128 do
local map_x = minp.x - 1 + x
local heightmap = {}
for z = 1, 128 do
local map_z = minp.z - 1 + z
local color
for map_y = maxp.y, minp.y, -1 do
local index = area:index(map_x, map_y, map_z)
local c_id = data[index]
if c_id ~= c_air then
color = color_cache[c_id]
if color == nil then
local nodename = minetest.get_name_from_content_id(c_id)
local def = minetest.registered_nodes[nodename]
if def then
local texture
if def.palette then
texture = def.palette
elseif def.tiles then
texture = def.tiles[1]
if type(texture) == "table" then
texture = texture.name
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end
end
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if texture then
texture = texture:match("([^=^%^]-([^.]+))$"):split("^")[1]
end
if def.palette then
local palette = palettes[texture]
color = palette and {palette = palette}
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else
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color = texture_colors[texture]
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end
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end
end
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if color and color.palette then
color = color.palette[param2data[index] + 1]
else
color_cache[c_id] = color or false
end
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if color and last_heightmap then
local last_height = last_heightmap[z]
if last_height < map_y then
color = {
math.min(255, color[1] + 16),
math.min(255, color[2] + 16),
math.min(255, color[3] + 16),
}
elseif last_height > map_y then
color = {
math.max(0, color[1] - 16),
math.max(0, color[2] - 16),
math.max(0, color[3] - 16),
}
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end
end
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height = map_y
break
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end
end
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heightmap[z] = height
pixels[z] = pixels[z] or {}
pixels[z][x] = color or {0, 0, 0}
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end
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last_heightmap = heightmap
end
tga_encoder.image(pixels):save(texture_path)
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creating_maps[texture] = false
end)
return itemstack
end
-- Turn empty map into filled map by rightclick
local make_filled_map = function(itemstack, placer, pointed_thing)
if minetest.settings:get_bool("enable_real_maps", true) then
local new_map = mcl_maps.create_map(placer:get_pos())
itemstack:take_item()
if itemstack:is_empty() then
return new_map
else
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local inv = placer:get_inventory()
if inv:room_for_item("main", new_map) then
inv:add_item("main", new_map)
else
minetest.add_item(placer:get_pos(), new_map)
end
return itemstack
end
end
end
minetest.register_craftitem("mcl_maps:empty_map", {
description = S("Empty Map"),
_doc_items_longdesc = S("Empty maps are not useful as maps, but they can be stacked and turned to maps which can be used."),
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_doc_items_usagehelp = S("Rightclick to create a filled map (which can't be stacked anymore)."),
inventory_image = "mcl_maps_map_empty.png",
on_place = make_filled_map,
on_secondary_use = make_filled_map,
stack_max = 64,
})
minetest.register_craftitem("mcl_maps:filled_map", {
description = S("Map"),
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_tt_help = S("Shows a map image."),
_doc_items_longdesc = S("When created, the map saves the nearby area as an image that can be viewed any time by holding the map."),
_doc_items_usagehelp = S("Hold the map in your hand. This will display a map on your screen."),
groups = {tool = 1, not_in_creative_inventory = 1},
inventory_image = "mcl_maps_map_filled.png^(mcl_maps_map_filled_markings.png^[colorize:#000000)",
stack_max = 64,
})
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tt.register_priority_snippet(function(itemstring, _, itemstack)
if itemstack and itemstring == "mcl_maps:filled_map" then
local id = itemstack:get_meta():get_string("mcl_maps:id")
if id ~= "" then
return "#" .. id, mcl_colors.GRAY
end
end
end)
minetest.register_craft({
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output = "mcl_maps:empty_map",
recipe = {
{ "mcl_core:paper", "mcl_core:paper", "mcl_core:paper" },
{ "mcl_core:paper", "group:compass", "mcl_core:paper" },
{ "mcl_core:paper", "mcl_core:paper", "mcl_core:paper" },
}
})
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minetest.register_craft({
type = "shapeless",
output = "mcl_maps:filled_map 2",
recipe = {"mcl_maps:filled_map", "mcl_maps:empty_map"},
})
minetest.register_on_craft(function(itemstack, player, old_craft_grid, craft_inv)
if itemstack:get_name() == "mcl_maps:filled_map" then
for _, stack in pairs(old_craft_grid) do
if stack:get_name() == "mcl_maps:filled_map" then
itemstack:get_meta():from_table(stack:get_meta():to_table())
return itemstack
end
end
end
end)
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local maps = {}
local huds = {}
minetest.register_on_joinplayer(function(player)
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huds[player] = player:hud_add({
hud_elem_type = "image",
text = "blank.png",
position = {x = 1, y = 1},
alignment = {x = -1, y = -1},
offset = {x = -125, y = -50},
scale = {x = 2, y = 2},
})
end)
minetest.register_on_leaveplayer(function(player)
maps[player] = nil
huds[player] = nil
end)
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local function is_holding_map(player)
local wield = player:get_wielded_item()
if wield:get_name() ~= "mcl_maps:filled_map" then
return
end
local meta = wield:get_meta()
local texture = meta:get_string("mcl_maps:texture")
if texture == "" then
return
end
if loaded_maps[texture] then
return texture
end
local path = meta:get_string("mcl_maps:texture_path")
if not creating_maps[texture] and not loading_maps[texture] then
loading_maps[texture] = true
local player_name = player:get_player_name()
minetest.dynamic_add_media(path, function(finished_name)
if player_name == finished_name then
loading_maps[texture] = false
loaded_maps[texture] = true
end
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end)
end
end
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minetest.register_globalstep(function(dtime)
for _, player in pairs(minetest.get_connected_players()) do
local texture = is_holding_map(player)
if texture then
if texture ~= maps[player] then
player:hud_change(huds[player], "text", texture)
maps[player] = texture
end
elseif maps[player] then
player:hud_change(huds[player], "text", "blank.png")
maps[player] = nil
end
end
end)