#include <Main/fg_props.hxx>
#include <Main/util.hxx>
+#include "atmosphere.hxx"
#include "fgmetar.hxx"
#include "environment_ctrl.hxx"
virtual bool passAirport(FGAirport* aApt) const {
return aApt->getMetar();
}
+
+ // permit heliports and seaports too
+ virtual FGPositioned::Type maxType() const
+ { return FGPositioned::SEAPORT; }
};
static AirportWithMetar airportWithMetarFilter;
{
double last_altitude_ft = 0.0;
double sort_required = false;
- int i;
+ size_t i;
- for (i = 0; i < node->nChildren(); i++) {
+ for (i = 0; i < (size_t)node->nChildren(); i++) {
const SGPropertyNode * child = node->getChild(i);
if ( strcmp(child->getName(), "entry") == 0
&& child->getStringValue("elevation-ft", "")[0] != '\0'
////////////////////////////////////////////////////////////////////////
FGMetarCtrl::FGMetarCtrl( SGSubsystem * environmentCtrl )
- : _environmentCtrl(environmentCtrl),
- station_elevation_ft(0.0),
+ :
metar_valid(false),
setup_winds_aloft(true),
wind_interpolation_required(true),
MaxCloudAltitudeChangeFtSec( 20.0 ),
MaxCloudThicknessChangeFtSec( 50.0 ),
MaxCloudInterpolationHeightFt( 5000.0 ),
- MaxCloudInterpolationDeltaFt( 4000.0 )
+ MaxCloudInterpolationDeltaFt( 4000.0 ),
+ _environmentCtrl(environmentCtrl)
{
windModulator = new FGBasicWindModulator();
return d > 180.0 ? d - 360.0 : d;
}
+// Return the sea level pressure for a metar observation, in inHg.
+// This is different from QNH because it accounts for the current
+// temperature at the observation point.
+// metarPressure in inHg
+// fieldHt in ft
+// fieldTemp in C
+
+static double reducePressureSl(double metarPressure, double fieldHt,
+ double fieldTemp)
+{
+ double elev = fieldHt * SG_FEET_TO_METER;
+ double fieldPressure
+ = FGAtmo::fieldPressure(elev, metarPressure * atmodel::inHg);
+ double slPressure = P_layer(0, elev, fieldPressure,
+ fieldTemp + atmodel::freezing,
+ atmodel::ISA::lam0);
+ return slPressure / atmodel::inHg;
+}
+
void
FGMetarCtrl::update(double dt)
{
bool reinit_required = false;
bool layer_rebuild_required = false;
+ double station_elevation_ft = station_elevation_n->getDoubleValue();
if (first_update) {
double dir = base_wind_dir_n->getDoubleValue()+magnetic_variation_n->getDoubleValue();
fgDefaultWeatherValue("visibility-m", metarvis);
double metarpressure = pressure_n->getDoubleValue();
- fgDefaultWeatherValue("pressure-sea-level-inhg", metarpressure);
+ fgDefaultWeatherValue("pressure-sea-level-inhg",
+ reducePressureSl(metarpressure,
+ station_elevation_ft,
+ temperature_n->getDoubleValue()));
// We haven't already loaded a METAR, so apply it immediately.
vector<SGPropertyNode_ptr> layers = clouds_n->getChildren("layer");
double pressure = boundary_sea_level_pressure_n->getDoubleValue();
double metarpressure = pressure_n->getDoubleValue();
- if( pressure != metarpressure ) {
- pressure = interpolate_val( pressure, metarpressure, MaxPressureChangeInHgSec );
+ double newpressure = reducePressureSl(metarpressure,
+ station_elevation_ft,
+ temperature_n->getDoubleValue());
+ if( pressure != newpressure ) {
+ pressure = interpolate_val( pressure, newpressure, MaxPressureChangeInHgSec );
fgDefaultWeatherValue("pressure-sea-level-inhg", pressure);
reinit_required = true;
}
}
}
}
-
- set_temp_at_altitude(temperature_n->getDoubleValue(), station_elevation_ft);
- set_dewpoint_at_altitude(dewpoint_n->getDoubleValue(), station_elevation_ft);
+ set_temp_at_altitude(temperature_n->getDoubleValue(), station_elevation_ft);
+ set_dewpoint_at_altitude(dewpoint_n->getDoubleValue(), station_elevation_ft);
//TODO: check if temperature/dewpoint have changed. This requires reinit.
// Force an update of the 3D clouds
break;
}
- metar_fetcher->fetch( airport_id );
+ metar_fetcher->fetch( airport_id );
}
}
#endif
search_timer(0.0),
error_timer(0.0),
_stale_count(0),
- _error_count(0)
+ _error_count(0),
+ enabled(false)
{
longitude_n = fgGetNode( "/position/longitude-deg", true );
latitude_n = fgGetNode( "/position/latitude-deg", true );
_stale_count = 0;
_error_count = 0;
current_airport_id.clear();
+ /* Torsten Dreyer:
+ hack to stop startup.nas complaining if metar arrives after nasal-dir-initialized
+ is fired. Immediately fetch and wait for the METAR before continuing. This gets the
+ /environment/metar/xxx properties filled before nasal-dir is initialized.
+ Maybe the runway selection should happen here to make startup.nas obsolete?
+ */
+ const char * startup_airport = fgGetString("/sim/startup/options/airport");
+ if( *startup_airport ) {
+ FGAirport * a = FGAirport::getByIdent( startup_airport );
+ if( a ) {
+ SGGeod pos = SGGeod::fromDeg(a->getLongitude(), a->getLatitude());
+ a = FGAirport::findClosest(pos, 10000.0, &airportWithMetarFilter);
+ current_airport_id = a->getId();
+ fetch( current_airport_id );
+ }
+ }
}
void FGMetarFetcher::reinit ()
_error_count = 0;
}
- if( enable_n->getBoolValue() == false )
+ if( enable_n->getBoolValue() == false ) {
+ enabled = false;
return;
+ }
+
+ // we were just enabled, reset all timers to
+ // trigger immediate metar fetch
+ if( !enabled ) {
+ search_timer = 0.0;
+ fetch_timer = 0.0;
+ error_timer = error_timer_sec;
+ enabled = true;
+ }
FGAirport * a = NULL;
void FGMetarFetcher::fetch( const string & id )
{
+ if( enable_n->getBoolValue() == false )
+ return;
+
SGSharedPtr<FGMetar> result = NULL;
// fetch current metar data
}
} else {
_stale_count = 0;
- }
+ }
} catch (const sg_io_exception& e) {
SG_LOG( SG_GENERAL, SG_WARN, "Error fetching live weather data: " << e.getFormattedMessage().c_str() );
result = NULL;
+ // remove METAR flag from the airport
+ FGAirport * a = FGAirport::findByIdent( id );
+ if( a ) a->setMetar( false );
+ // immediately schedule a new search
+ search_timer = 0.0;
}
// write the metar to the property node, the rest is done by the methods tied to this property
projects / flightgear.git / blobdiff