hlrc

    if (gaze_state_animation_restart) {

        // new incoming target, set up soft fade:

        gaze_state_old = gaze_state;

        gaze_state_end_time = get_system_time() + boost::posix_time::milliseconds(overblend_time);

        gaze_state_animation_restart = false;

    boost::posix_time::time_duration tdiff = gaze_state_end_time - get_system_time();

    if (tdiff.is_negative()) {

        // animation is done, exit now

    } else {

        // do smooth animation

        double diff_ms = tdiff.total_milliseconds();