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Lua voxelmanip: Add optional buffer param for 'get param2 data'

Update lua_api.txt.
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paramat committed Oct 29, 2016
1 parent 380a4b6 commit 70e2df4f86cf4101a10c7e1f7a6ac5cc03992793
Showing with 10 additions and 2 deletions.
  1. +3 −1 doc/lua_api.txt
  2. +7 −1 src/script/lua_api/l_vmanip.cpp
@@ -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`
@@ -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);

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