создание новых пользовательских данных

#define GRID_META "denisbaic.gridmanager"
#define checkgrid(L) \
    *static_cast<GridManager**>(luaL_checkudata(L,1,GRID_META))

int l_sin(lua_State* L)
{
    const double d = luaL_checknumber(L,1);
    lua_pushnumber(L, sin(d));
    return 1;
}

int l_GenerateAndCalculateCorridors(lua_State* L)
{
    const int RoomsToGenerate = luaL_checkinteger(L, 1);
    const int MinSideSize = luaL_checkinteger(L, 2);
    const int MaxSideSize = luaL_checkinteger(L, 3);
    const float MaxStep = luaL_checknumber(L, 4);
    const float Buffer = luaL_checknumber(L, 5);
    lua_pop(L, 5);
    std::vector<Room> Rooms;
    std::vector<EdgeDelaunay> Corridors;
    DungeonGenerator::GenerateAndCalculateCorridors(Rooms, Corridors, RoomsToGenerate, MinSideSize, MaxSideSize, MaxStep, Buffer);

    GridManager** grid_manager_ptr = static_cast<GridManager**>(lua_newuserdata(L, sizeof *grid_manager_ptr));

    *grid_manager_ptr = new GridManager(Rooms, Corridors);

    luaL_getmetatable(L, GRID_META);
    lua_setmetatable(L, -2);

    return 1;
}