Method serializeMetadataToDisk

outofcore/src/outofcore_base_data.cpp:131–167

    ////////////////////////////////////////////////////////////////////////////////

    void
    OutofcoreOctreeBaseMetadata::serializeMetadataToDisk ()
    {
      if (LOD_num_points_.empty ())
        return;

      // Create JSON object
      std::shared_ptr<cJSON> idx (cJSON_CreateObject (), cJSON_Delete);
  
      cJSON* name = cJSON_CreateString (tree_name_.c_str ());
      cJSON* version = cJSON_CreateNumber ( __PCL_OUTOFCORE_VERSION__ );
      cJSON* pointtype = cJSON_CreateString (point_type_.c_str ());
      cJSON* lod = cJSON_CreateNumber (static_cast<double> (levels_of_depth_));

      // cJSON does not allow 64 bit ints.  Have to put the points in a double to
      // use this api, will allow counts up to 2^52 points to be stored correctly
      //or split into LSB MSB?
      std::vector<double> lodPoints_db;
      lodPoints_db.insert (lodPoints_db.begin (), LOD_num_points_.begin (), LOD_num_points_.end ());

      cJSON* numpts = cJSON_CreateDoubleArray ( &(lodPoints_db.front ()), static_cast<int>(lodPoints_db.size ()));

      cJSON_AddItemToObject (idx.get (), "name", name);
      cJSON_AddItemToObject (idx.get (), "version", version);
      cJSON_AddItemToObject (idx.get (), "pointtype", pointtype);
      cJSON_AddItemToObject (idx.get (), "lod", lod);
      cJSON_AddItemToObject (idx.get (), "numpts", numpts);
      cJSON_AddStringToObject(idx.get(), "coord_system", coordinate_system_.c_str());

      char* idx_txt = cJSON_Print (idx.get ());

      std::ofstream f (metadata_filename_.string ().c_str (), std::ios::out | std::ios::trunc);
      f << idx_txt;
      f.close ();

      free (idx_txt);
    }

    ////////////////////////////////////////////////////////////////////////////////