C++ (Cpp) NMEAInfo::ClearWeakBaroAltitude Examples

Example #1

File: Parser.cpp Project: ThomasXBMC/XCSoar

bool
NMEAParser::RMZ(NMEAInputLine &line, NMEAInfo &info)
{
    //JMW?  RMZAltitude = info.pressure.PressureAltitudeToQNHAltitude(RMZAltitude);

    fixed value;
    if (ReadAltitude(line, value)) {
        // JMW no in-built baro sources, so use this generic one
        if (info.flarm.IsDetected()) {
            /* FLARM emulates the Garmin $PGRMZ sentence, but emits the
               altitude above 1013.25 hPa - since the don't have a "FLARM"
               device driver, we use the auto-detected "isFlarm" flag
               here */
            info.ProvideWeakPressureAltitude(value);

            /* when a FLARM gets detected too late, the previous call to
               this function may have filled the PGRMZ value into
               "barometric altitude"; that was a misapprehension, and the
               following line attempts to correct it as early as possible */
            info.ClearWeakBaroAltitude();
        } else {
            info.ProvideWeakBaroAltitude(value);
            info.ClearWeakPressureAltitude();
        }
    }

    return true;
}