Function runGridMapIteratorVersion2

grid_map_demos/src/iterator_benchmark.cpp:34–44

! * Improved efficiency by storing direct access to data layers. */

 * Improved efficiency by storing direct access to data layers.
 */
void runGridMapIteratorVersion2(GridMap& map, const string& layer_from, const string& layer_to)
{
  const auto& data_from = map[layer_from];
  auto& data_to = map[layer_to];
  for (GridMapIterator iterator(map); !iterator.isPastEnd(); ++iterator) {
    const Index index(*iterator);
    const float value_from = data_from(index(0), index(1));
    float& value_to = data_to(index(0), index(1));
    value_to = value_to > value_from ? value_to : value_from;
  }
}

/*!
 * Improved efficiency by using linear index.