cartographer/map_api.lua

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local map_data, chunk, biome_lookup, marker_lookup = ...;
function cartographer.create_map(x, z, w, h, filled, detail, scale)
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local id = map_data.next_map_id;
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local map = {
id = id,
x = x,
z = z,
w = w,
h = h,
detail = detail,
scale = scale,
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fill = {},
markers = {},
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};
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map_data.maps[id] = map;
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if filled then
cartographer.fill(map, x, z, w, h);
end
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map_data.next_map_id = map_data.next_map_id + 1;
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return id;
end
function cartographer.get_map(id)
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return map_data.maps[id];
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end
function cartographer.resize_map(id, w, h)
local map = cartographer.get_map(id);
if map ~= nil and w >= map.w and h >= map.h then
map.w = w;
map.h = h;
end
end
function cartographer.fill(map, x, z, w, h)
if map == nil then
return;
end
for i = math.max(x, map.x),math.min(x + w - 1, map.x + map.w),1 do
for j = math.max(z, map.z),math.min(z + h - 1, map.z + map.h),1 do
map.fill[(i - map.x) + ((j - map.z) * map.w)] = map.detail;
end
end
end
function cartographer.set_marker(map, x, z, marker)
if map == nil or x < map.x or x > map.x + map.w or z < map.z or z > map.z + map.h then
return;
end
if not map.markers[x] then
map.markers[x] = {
[z] = marker,
};
else
map.markers[x][z] = marker;
end
end
function cartographer.get_marker(map, x, z)
if map == nil or x < map.x or x > map.x + map.w or z < map.z or z > map.z + map.h or not map.markers[x] then
return nil;
end
return map.markers[x][z];
end
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-- Fill in the local area of a map around a position
-- id: A map ID
-- x: The x position, in world coordinates
-- z: The z position, in world coordinates
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function cartographer.fill_local(id, x, z)
local map = cartographer.get_map(id);
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x, z = cartographer.to_map_coordinates(map, x, z);
-- TODO: Adjust size to match map scale
if map and x >= map.x - 2 and x <= map.x + map.w + 1 and z >= map.z - 2 and z <= map.z + map.h + 1 then
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cartographer.fill(map, x - 2, z - 2, 5, 5);
end
end
-- Convert a position in world coordinates to the given map's coordinate system
-- map: The map to use as reference, or nil to use the default size (map scale of 1)
-- x: The x position, in world coordinates
-- z: The z position, in world coordinates
--
-- Returns The converted x and z coordinates
function cartographer.to_map_coordinates(map, x, z)
if not map or map.scale == 0 then
return chunk.to(x), chunk.to(z);
end
return math.floor(chunk.to(x) / map.scale + 0.5), math.floor(chunk.to(z) / map.scale + 0.5);
end
-- Periodically-called function to fill in maps and queue chunks for manual
-- scanning
local function fill_loop()
-- Fill in all player-held maps
for _,p in ipairs(minetest.get_connected_players()) do
local inventory = p:get_inventory();
local pos = p:get_pos();
if pos.y > -10 then
for i = 1,inventory:get_size("main") do
local stack = inventory:get_stack("main", i);
if stack:get_name() == "cartographer:map" then
cartographer.fill_local(stack:get_meta():get_int("cartographer:map_id"), pos.x, pos.z);
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end
end
for i = -2,2 do
for j = -2,2 do
local adjusted_pos = {
x = pos.x + chunk.from(i),
y = pos.y,
z = pos.z + chunk.from(j),
}
cartographer.queue_region(adjusted_pos);
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end
end
end
end
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for _ = 1,10 do
cartographer.scan_regions();
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end
minetest.after(5, fill_loop);
end
minetest.after(5, fill_loop);
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-- Register a biome with textures to display
-- name: A string containing the biome name
-- textures: A table of texture names.
-- These should correspond with detail levels,
-- any detail level past the length of the table will return the last texture
-- (Optional) min_height: The minimum Y position where this biome data should be used
-- (Optional) max_height: The maximum Y position where this biome data should be used
function cartographer.register_biome(name, textures, min_height, max_height)
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biome_lookup[#biome_lookup + 1] = {
name = name,
textures = textures,
min_height = min_height,
max_height = max_height,
};
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end
-- Format marker ids to allow their use as formspec element ids.
-- We're mostly concerned with guarding against the : character because it is
-- common for ids and has an alternate meaning in formspecs.
-- id: The id to format
--
-- Returns the formatted id
local function format_marker_id(id)
return id:gsub(":", "_");
end
-- Find the marker data for a given id
-- id: The id to search for
--
-- Returns the marker data, or nil if not found
function cartographer.get_marker_data(id)
if not id then
return nil;
end
id = format_marker_id(id);
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for _,marker in pairs(marker_lookup) do
if marker.id == id then
return marker;
end
end
return nil;
end
-- Register a marker with textures to display
-- id: A string containing the id of the marker
-- name: A string containing the displayedname of the marker
-- textures: A table of texture names.
-- These should correspond with detail levels,
-- any detail level past the length of the table will return the last texture
function cartographer.register_marker(id, name, textures)
if not id then
return nil;
end
id = format_marker_id(id);
local existing_marker = cartographer.get_marker_data(id);
if existing_marker then
existing_marker.name = name;
existing_marker.textures = textures;
else
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marker_lookup[#marker_lookup+1] = {
id = id,
name = name,
textures = textures,
};
end
end
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function cartographer.is_filled(map, x, z)
if map == nil then
return false;
end
return map.fill[(x - map.x) + ((z - map.z) * map.w)] ~= nil;
end
-- Get an entry from a list for a given detail level
-- textures: An array of textures
-- detail: The detail level
--
-- Returns the entry at detail, or the last entry if detail is out-of-bounds
function cartographer.detail_texture(textures, detail)
return textures[math.min(detail, #textures)];
end
-- Get the texture name (minus index/extension) for the given biome, height, and detail level.
-- name: A string containing the biome name
-- height: A number representing the Y position of the biome
-- detail: The detail level
-- Returns a string with a texture name, or nil if no matching biome entry was found.
function cartographer.get_biome_texture(name, height, detail)
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for _,biome in ipairs(biome_lookup) do
local matches_height = (not biome.min_height or height >= biome.min_height)
and (not biome.max_height or height <= biome.max_height);
if biome.name == name and matches_height then
return cartographer.detail_texture(biome.textures, detail);
end
end
return nil;
end
-- Get the texture name (minus extension) for the given marker and detail level.
-- id: A string containing the marker id
-- detail: The detail level
-- Returns a string with a texture name, or nil if no matching marker was found.
function cartographer.get_marker_texture(id, detail)
if not id then
return nil;
end
id = format_marker_id(id);
local marker = cartographer.get_marker_data(id);
if marker then
return marker.textures[math.min(detail, #marker.textures)];
end
return nil;
end
-- Play a feedback sound localized on the given player
-- sound: The sound to play
-- player: The player who triggered the sound
function cartographer.map_sound(sound, player)
minetest.sound_play(sound, { pos=player:get_pos(), max_hear_distance=5 }, true);
end