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-rw-r--r--doc/lua_api.txt4
-rw-r--r--src/script/lua_api/l_vmanip.cpp8
2 files changed, 10 insertions, 2 deletions
diff --git a/doc/lua_api.txt b/doc/lua_api.txt
index 43ff66bb9..da90f93d2 100644
--- a/doc/lua_api.txt
+++ b/doc/lua_api.txt
@@ -3263,7 +3263,9 @@ will place the schematic inside of the VoxelManip.
* `set_light_data(light_data)`: Sets the `param1` (light) contents of each node
in the `VoxelManip`
* expects lighting data in the same format that `get_light_data()` returns
-* `get_param2_data()`: Gets the raw `param2` data read into the `VoxelManip` object
+* `get_param2_data([buffer])`: Gets the raw `param2` data read into the `VoxelManip` object
+ * Returns an array (indices 1 to volume) of integers ranging from `0` to `255`
+ * If the param `buffer` is present, this table will be used to store the result instead
* `set_param2_data(param2_data)`: Sets the `param2` contents of each node in the `VoxelManip`
* `calc_lighting([p1, p2], [propagate_shadow])`: Calculate lighting within the `VoxelManip`
* To be used only by a `VoxelManip` object from `minetest.get_mapgen_object`
diff --git a/src/script/lua_api/l_vmanip.cpp b/src/script/lua_api/l_vmanip.cpp
index 0d8123acd..bdf720f0a 100644
--- a/src/script/lua_api/l_vmanip.cpp
+++ b/src/script/lua_api/l_vmanip.cpp
@@ -277,11 +277,17 @@ int LuaVoxelManip::l_get_param2_data(lua_State *L)
NO_MAP_LOCK_REQUIRED;
LuaVoxelManip *o = checkobject(L, 1);
+ bool use_buffer = lua_istable(L, 2);
+
MMVManip *vm = o->vm;
u32 volume = vm->m_area.getVolume();
- lua_newtable(L);
+ if (use_buffer)
+ lua_pushvalue(L, 2);
+ else
+ lua_newtable(L);
+
for (u32 i = 0; i != volume; i++) {
lua_Integer param2 = vm->m_data[i].param2;
lua_pushinteger(L, param2);