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Find nodes in area (under air): Raise volume limit and document it

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paramat committed Feb 21, 2018
1 parent 5652ede commit 673f7196a2200a8f77d04a0470f642f729a4f94b
Showing with 8 additions and 14 deletions.
  1. +2 −0 doc/lua_api.txt
  2. +6 −14 src/script/lua_api/l_env.cpp
@@ -2819,9 +2819,11 @@ and `minetest.auth_reload` call the authentication handler.
* `nodenames`: e.g. `{"ignore", "group:tree"}` or `"default:dirt"`
* First return value: Table with all node positions
* Second return value: Table with the count of each node with the node name as index
* Area volume is limited to 4,096,000 nodes
* `minetest.find_nodes_in_area_under_air(pos1, pos2, nodenames)`: returns a list of positions
* `nodenames`: e.g. `{"ignore", "group:tree"}` or `"default:dirt"`
* Return value: Table with all node positions with a node air above
* Area volume is limited to 4,096,000 nodes
* `minetest.get_perlin(noiseparams)`
* `minetest.get_perlin(seeddiff, octaves, persistence, scale)`
* Return world-specific perlin noise (`int(worldseed)+seeddiff`)
@@ -801,14 +801,10 @@ int ModApiEnvMod::l_find_nodes_in_area(lua_State *L)
sortBoxVerticies(minp, maxp);

v3s16 cube = maxp - minp + 1;

/* Limit for too large areas, assume default values
* and give tolerances of 1 node on each side
* (chunksize * MAP_BLOCKSIZE + 2)^3 = 551368
*/
if ((u64)cube.X * (u64)cube.Y * (u64)cube.Z > 551368) {
// Volume limit equal to 8 default mapchunks, (80 * 2) ^ 3 = 4,096,000
if ((u64)cube.X * (u64)cube.Y * (u64)cube.Z > 4096000) {
luaL_error(L, "find_nodes_in_area(): area volume"
" exceeds allowed value of 551368");
" exceeds allowed value of 4096000");
return 0;
}

@@ -873,14 +869,10 @@ int ModApiEnvMod::l_find_nodes_in_area_under_air(lua_State *L)
sortBoxVerticies(minp, maxp);

v3s16 cube = maxp - minp + 1;

/* Limit for too large areas, assume default values
* and give tolerances of 1 node on each side
* (chunksize * MAP_BLOCKSIZE + 2)^3 = 551368
*/
if ((u64)cube.X * (u64)cube.Y * (u64)cube.Z > 551368) {
// Volume limit equal to 8 default mapchunks, (80 * 2) ^ 3 = 4,096,000
if ((u64)cube.X * (u64)cube.Y * (u64)cube.Z > 4096000) {
luaL_error(L, "find_nodes_in_area_under_air(): area volume"
" exceeds allowed value of 551368");
" exceeds allowed value of 4096000");
return 0;
}

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