message: gimbal: add ROI to example
diff: @@ -163,6 +163,14 @@ int main(int argc, char** argv)
  gimbal.set_pitch_and_yaw(0.0f, 0.0f);
  sleep_for(seconds(2));
  + std::cout << "Set ROI (region of interested) location...\n";
  + gimbal.set_roi_location(47.39743832, 8.5463316, 488.0f);
  + sleep_for(seconds(3));
  +
  + std::cout << "Back to the center...\n";
  + gimbal.set_pitch_and_yaw(0.0f, 0.0f);
  + sleep_for(seconds(2));
  +
  std::cout << "Stop controlling gimbal...\n";
  gimbal_result = gimbal.release_control();
  if (gimbal_result != Gimbal::Result::Success) {
  