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Lua API documentation: Various fixes (#12059)
Change 1: Clarify when on_step collision information is provided Change 2: Document PostgreSQL and Redis settings Change 3: Overall AreaStore documentation improvements including consistent parameter naming based on community suggestions
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@ -6211,45 +6211,53 @@ Sorted alphabetically.
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`AreaStore`
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-----------
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A fast access data structure to store areas, and find areas near a given
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position or area.
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Every area has a `data` string attribute to store additional information.
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You can create an empty `AreaStore` by calling `AreaStore()`, or
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`AreaStore(type_name)`. The mod decides where to save and load AreaStore.
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If you chose the parameter-less constructor, a fast implementation will be
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automatically chosen for you.
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AreaStore is a data structure to calculate intersections of 3D cuboid volumes
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and points. The `data` field (string) may be used to store and retrieve any
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mod-relevant information to the specified area.
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Despite its name, mods must take care of persisting AreaStore data. They may
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use the provided load and write functions for this.
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### Methods
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* `get_area(id, include_borders, include_data)`
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* `AreaStore(type_name)`
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* Returns a new AreaStore instance
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* `type_name`: optional, forces the internally used API.
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* Possible values: `"LibSpatial"` (default).
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* When other values are specified, or SpatialIndex is not available,
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the custom Minetest functions are used.
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* `get_area(id, include_corners, include_data)`
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* Returns the area information about the specified ID.
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* Returned values are either of these:
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nil -- Area not found
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true -- Without `include_borders` and `include_data`
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true -- Without `include_corners` and `include_data`
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{
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min = pos, max = pos -- `include_borders == true`
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min = pos, max = pos -- `include_corners == true`
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data = string -- `include_data == true`
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}
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* `get_areas_for_pos(pos, include_borders, include_data)`
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* `get_areas_for_pos(pos, include_corners, include_data)`
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* Returns all areas as table, indexed by the area ID.
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* Table values: see `get_area`.
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* `get_areas_in_area(edge1, edge2, accept_overlap, include_borders, include_data)`
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* Returns all areas that contain all nodes inside the area specified by `edge1`
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and `edge2` (inclusive).
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* `get_areas_in_area(corner1, corner2, accept_overlap, include_corners, include_data)`
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* Returns all areas that contain all nodes inside the area specified by`
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`corner1 and `corner2` (inclusive).
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* `accept_overlap`: if `true`, areas are returned that have nodes in
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common (intersect) with the specified area.
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* Returns the same values as `get_areas_for_pos`.
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* `insert_area(edge1, edge2, data, [id])`: inserts an area into the store.
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* `insert_area(corner1, corner2, data, [id])`: inserts an area into the store.
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* Returns the new area's ID, or nil if the insertion failed.
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* The (inclusive) positions `edge1` and `edge2` describe the area.
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* The (inclusive) positions `corner1` and `corner2` describe the area.
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* `data` is a string stored with the area.
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* `id` (optional): will be used as the internal area ID if it is an unique
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number between 0 and 2^32-2.
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* `reserve(count)`: reserves resources for at most `count` many contained
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areas.
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Only needed for efficiency, and only some implementations profit.
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* `reserve(count)`
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* Requires SpatialIndex, no-op function otherwise.
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* Reserves resources for `count` many contained areas to improve
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efficiency when working with many area entries. Additional areas can still
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be inserted afterwards at the usual complexity.
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* `remove_area(id)`: removes the area with the given id from the store, returns
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success.
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* `set_cache_params(params)`: sets params for the included prefiltering cache.
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@ -7362,7 +7370,7 @@ Used by `minetest.register_entity`.
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-- for more info) by using a '_' prefix
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}
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Collision info passed to `on_step`:
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Collision info passed to `on_step` (`moveresult` argument):
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{
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touching_ground = boolean,
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@ -7379,6 +7387,8 @@ Collision info passed to `on_step`:
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},
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...
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}
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-- `collisions` does not contain data of unloaded mapblock collisions
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-- or when the velocity changes are negligibly small
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}
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ABM (ActiveBlockModifier) definition
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@ -129,9 +129,9 @@ Example content (added indentation and - explanations):
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backend = sqlite3 - which DB backend to use for blocks (sqlite3, dummy, leveldb, redis, postgresql)
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player_backend = sqlite3 - which DB backend to use for player data
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readonly_backend = sqlite3 - optionally readonly seed DB (DB file _must_ be located in "readonly" subfolder)
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auth_backend = files - which DB backend to use for authentication data
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server_announce = false - whether the server is publicly announced or not
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load_mod_<mod> = false - whether <mod> is to be loaded in this world
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auth_backend = files - which DB backend to use for authentication data
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For load_mod_<mod>, the possible values are:
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@ -145,6 +145,18 @@ For load_mod_<mod>, the possible values are:
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* Other locations and absolute paths are not supported
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* Note that `moddir` is the directory name, not the mod name specified in mod.conf.
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PostgreSQL backend specific settings:
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pgsql_connection = host=127.0.0.1 port=5432 user=mt_user password=mt_password dbname=minetest
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pgsql_player_connection = (same parameters as above)
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pgsql_readonly_connection = (same parameters as above)
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pgsql_auth_connection = (same parameters as above)
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Redis backend specific settings:
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redis_address = 127.0.0.1 - Redis server address
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redis_hash = foo - Database hash
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redis_port = 6379 - (optional) connection port
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redis_password = hunter2 - (optional) server password
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Player File Format
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===================
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@ -27,26 +27,26 @@ with this program; if not, write to the Free Software Foundation, Inc.,
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#include "filesys.h"
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#include <fstream>
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static inline void get_data_and_border_flags(lua_State *L, u8 start_i,
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bool *borders, bool *data)
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static inline void get_data_and_corner_flags(lua_State *L, u8 start_i,
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bool *corners, bool *data)
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{
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if (!lua_isboolean(L, start_i))
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return;
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*borders = lua_toboolean(L, start_i);
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*corners = lua_toboolean(L, start_i);
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if (!lua_isboolean(L, start_i + 1))
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return;
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*data = lua_toboolean(L, start_i + 1);
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}
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static void push_area(lua_State *L, const Area *a,
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bool include_borders, bool include_data)
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bool include_corners, bool include_data)
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{
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if (!include_borders && !include_data) {
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if (!include_corners && !include_data) {
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lua_pushboolean(L, true);
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return;
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}
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lua_newtable(L);
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if (include_borders) {
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if (include_corners) {
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push_v3s16(L, a->minedge);
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lua_setfield(L, -2, "min");
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push_v3s16(L, a->maxedge);
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@ -59,13 +59,13 @@ static void push_area(lua_State *L, const Area *a,
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}
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static inline void push_areas(lua_State *L, const std::vector<Area *> &areas,
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bool borders, bool data)
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bool corners, bool data)
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{
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lua_newtable(L);
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size_t cnt = areas.size();
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for (size_t i = 0; i < cnt; i++) {
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lua_pushnumber(L, areas[i]->id);
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push_area(L, areas[i], borders, data);
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push_area(L, areas[i], corners, data);
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lua_settable(L, -3);
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}
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}
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@ -94,7 +94,7 @@ int LuaAreaStore::gc_object(lua_State *L)
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return 0;
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}
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// get_area(id, include_borders, include_data)
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// get_area(id, include_corners, include_data)
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int LuaAreaStore::l_get_area(lua_State *L)
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{
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NO_MAP_LOCK_REQUIRED;
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@ -104,9 +104,9 @@ int LuaAreaStore::l_get_area(lua_State *L)
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u32 id = luaL_checknumber(L, 2);
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bool include_borders = true;
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bool include_corners = true;
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bool include_data = false;
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get_data_and_border_flags(L, 3, &include_borders, &include_data);
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get_data_and_corner_flags(L, 3, &include_corners, &include_data);
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const Area *res;
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@ -114,12 +114,12 @@ int LuaAreaStore::l_get_area(lua_State *L)
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if (!res)
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return 0;
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push_area(L, res, include_borders, include_data);
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push_area(L, res, include_corners, include_data);
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return 1;
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}
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// get_areas_for_pos(pos, include_borders, include_data)
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// get_areas_for_pos(pos, include_corners, include_data)
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int LuaAreaStore::l_get_areas_for_pos(lua_State *L)
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{
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NO_MAP_LOCK_REQUIRED;
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@ -129,19 +129,19 @@ int LuaAreaStore::l_get_areas_for_pos(lua_State *L)
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v3s16 pos = check_v3s16(L, 2);
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bool include_borders = true;
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bool include_corners = true;
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bool include_data = false;
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get_data_and_border_flags(L, 3, &include_borders, &include_data);
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get_data_and_corner_flags(L, 3, &include_corners, &include_data);
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std::vector<Area *> res;
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ast->getAreasForPos(&res, pos);
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push_areas(L, res, include_borders, include_data);
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push_areas(L, res, include_corners, include_data);
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return 1;
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}
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// get_areas_in_area(edge1, edge2, accept_overlap, include_borders, include_data)
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// get_areas_in_area(corner1, corner2, accept_overlap, include_corners, include_data)
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int LuaAreaStore::l_get_areas_in_area(lua_State *L)
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{
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NO_MAP_LOCK_REQUIRED;
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@ -149,25 +149,26 @@ int LuaAreaStore::l_get_areas_in_area(lua_State *L)
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LuaAreaStore *o = checkobject(L, 1);
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AreaStore *ast = o->as;
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v3s16 minedge = check_v3s16(L, 2);
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v3s16 maxedge = check_v3s16(L, 3);
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v3s16 minp = check_v3s16(L, 2);
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v3s16 maxp = check_v3s16(L, 3);
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sortBoxVerticies(minp, maxp);
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bool include_borders = true;
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bool include_corners = true;
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bool include_data = false;
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bool accept_overlap = false;
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if (lua_isboolean(L, 4)) {
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accept_overlap = readParam<bool>(L, 4);
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get_data_and_border_flags(L, 5, &include_borders, &include_data);
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get_data_and_corner_flags(L, 5, &include_corners, &include_data);
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}
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std::vector<Area *> res;
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ast->getAreasInArea(&res, minedge, maxedge, accept_overlap);
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push_areas(L, res, include_borders, include_data);
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ast->getAreasInArea(&res, minp, maxp, accept_overlap);
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push_areas(L, res, include_corners, include_data);
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return 1;
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}
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// insert_area(edge1, edge2, data, id)
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// insert_area(corner1, corner2, data, id)
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int LuaAreaStore::l_insert_area(lua_State *L)
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{
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NO_MAP_LOCK_REQUIRED;
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