document SoundEmitter

[varnholt]

   auto instance = std::make_shared<SoundEmitter>(parent);

   instance->_position.x = data._tmx_object->_x_px;
   instance->_position.y = data._tmx_object->_y_px;
   instance->_size.x = data._tmx_object->_width_px;
   instance->_size.y = data._tmx_object->_height_px;
   instance->setObjectId(data._tmx_object->_name);
   instance->_rect =
      sf::FloatRect{data._tmx_object->_x_px, data._tmx_object->_y_px, data._tmx_object->_width_px, data._tmx_object->_height_px};

   // deserialize range data
   if (data._tmx_object->_properties)
   {
      // read audio range properties
      AudioRange audio_range;
      const auto radius_far_px = data._tmx_object->_properties->_map.find("radius_far_px");
      if (radius_far_px != data._tmx_object->_properties->_map.cend())
      {
         audio_range._radius_far_px = radius_far_px->second->_value_float.value();
      }

      const auto volume_far = data._tmx_object->_properties->_map.find("volume_far");
      if (volume_far != data._tmx_object->_properties->_map.cend())
      {
         audio_range._volume_far = volume_far->second->_value_float.value();
      }

      const auto radius_near_px = data._tmx_object->_properties->_map.find("radius_near_px");
      if (radius_near_px != data._tmx_object->_properties->_map.cend())
      {
         audio_range._radius_near_px = radius_near_px->second->_value_float.value();
      }

      const auto volume_near = data._tmx_object->_properties->_map.find("volume_near");
      if (volume_near != data._tmx_object->_properties->_map.cend())
      {
         audio_range._volume_near = volume_near->second->_value_float.value();
      }

      instance->_audio_range = audio_range;

      // read sample properties
      const auto looped = data._tmx_object->_properties->_map.find("looped");
      if (looped != data._tmx_object->_properties->_map.cend())
      {
         instance->_looped = looped->second->_value_bool.value();
      }

      const auto filename = data._tmx_object->_properties->_map.find("filename");
      if (filename != data._tmx_object->_properties->_map.cend())
      {
         instance->_filename = filename->second->_value_string.value();
      }

      Audio::getInstance().addSample(instance->_filename);
   }