#include "metarairportfilter.hxx"
#include <simgear/scene/sky/cloud.hxx>
#include <simgear/structure/exception.hxx>
+#include <simgear/misc/strutils.hxx>
+#include <simgear/magvar/magvar.hxx>
+#include <simgear/timing/sg_time.hxx>
#include <Main/fg_props.hxx>
using std::string;
static vector<string> coverage_string;
+/**
+ * @brief Helper class to wrap SGMagVar functionality and cache the variation and dip for
+ * a certain position.
+ */
+class MagneticVariation : public SGMagVar {
+public:
+ /**
+ * Constructor
+ */
+ MagneticVariation() : _lat(1), _lon(1), _alt(1) {
+ recalc( 0.0, 0.0, 0.0 );
+ }
+
+ /**
+ * @brief get the magnetic variation for a specific position at the current time
+ * @param lon the positions longitude in degrees
+ * @param lat the positions latitude in degrees
+ * @param alt the positions height above MSL (aka altitude) in feet
+ * @return the magnetic variation in degrees
+ */
+ double get_variation_deg( double lon, double lat, double alt );
+
+ /**
+ * @brief get the magnetic dip for a specific position at the current time
+ * @param lon the positions longitude in degrees
+ * @param lat the positions latitude in degrees
+ * @param alt the positions height above MSL (aka altitude) in feet
+ * @return the magnetic dip in degrees
+ */
+ double get_dip_deg( double lon, double lat, double alt );
+private:
+ void recalc( double lon, double lat, double alt );
+ SGTime _time;
+ double _lat, _lon, _alt;
+};
+
+inline void MagneticVariation::recalc( double lon, double lat, double alt )
+{
+ // calculation of magnetic variation is expensive. Cache the position
+ // and perform this calculation only if it has changed
+ if( _lon != lon || _lat != lat || _alt != alt ) {
+ SG_LOG(SG_ALL, SG_DEBUG, "Recalculating magvar for lon=" << lon << ", lat=" << lat << ", alt=" << alt );
+ _lon = lon;
+ _lat = lat;
+ _alt = alt;
+
+ lon *= SGD_DEGREES_TO_RADIANS;
+ lat *= SGD_DEGREES_TO_RADIANS;
+ alt *= SG_FEET_TO_METER;
+ _time.update( lon, lat, 0, 0 );
+ update( lon, lat, alt, _time.getJD() );
+ }
+}
+
+inline double MagneticVariation::get_variation_deg( double lon, double lat, double alt )
+{
+ recalc( lon, lat, alt );
+ return get_magvar() * SGD_RADIANS_TO_DEGREES;
+}
+
+inline double MagneticVariation::get_dip_deg( double lon, double lat, double alt )
+{
+ recalc( lon, lat, alt );
+ return get_magdip() * SGD_RADIANS_TO_DEGREES;
+}
+
MetarProperties::MetarProperties( SGPropertyNode_ptr rootNode ) :
_rootNode(rootNode),
_metarValidNode( rootNode->getNode( "valid", true ) ),
_rain(0.0),
_hail(0.0),
_snow(0.0),
- _snow_cover(false)
+ _snow_cover(false),
+ _magneticVariation(new MagneticVariation())
{
// Hack to avoid static initialization order problems on OSX
if( coverage_string.size() == 0 ) {
_metarValidNode->setBoolValue( false );
_tiedProperties.setRoot( _rootNode );
_tiedProperties.Tie("data", this, &MetarProperties::get_metar, &MetarProperties::set_metar );
- _tiedProperties.Tie("station-id", this, &MetarProperties::get_station_id );
+ _tiedProperties.Tie("station-id", this, &MetarProperties::get_station_id, &MetarProperties::set_station_id );
_tiedProperties.Tie("station-elevation-ft", &_station_elevation );
_tiedProperties.Tie("station-latitude-deg", &_station_latitude );
_tiedProperties.Tie("station-longitude-deg", &_station_longitude );
+ _tiedProperties.Tie("station-magnetic-variation-deg", this, &MetarProperties::get_magnetic_variation_deg );
+ _tiedProperties.Tie("station-magnetic-dip-deg", this, &MetarProperties::get_magnetic_dip_deg );
_tiedProperties.Tie("min-visibility-m", &_min_visibility );
_tiedProperties.Tie("max-visibility-m", &_max_visibility );
_tiedProperties.Tie("base-wind-range-from", &_base_wind_range_from );
MetarProperties::~MetarProperties()
{
+ delete _magneticVariation;
}
_metarValidNode->setBoolValue(true);
}
+void MetarProperties::setStationId( const std::string & value )
+{
+ set_station_id(simgear::strutils::strip(value).c_str());
+}
+
+double MetarProperties::get_magnetic_variation_deg() const
+{
+ return _magneticVariation->get_variation_deg( _station_longitude, _station_latitude, _station_elevation );
+}
+
+double MetarProperties::get_magnetic_dip_deg() const
+{
+ return _magneticVariation->get_dip_deg( _station_longitude, _station_latitude, _station_elevation );
+}
+
} // namespace Environment
namespace Environment {
+/* -------------------------------------------------------------------------------- */
+
+class LiveMetarProperties : public MetarProperties {
+public:
+ LiveMetarProperties( SGPropertyNode_ptr rootNode );
+ virtual ~LiveMetarProperties();
+ virtual void update( double dt );
+
+ virtual double getTimeToLive() const { return _timeToLive; }
+ virtual void setTimeToLive( double value ) { _timeToLive = value; }
+private:
+ double _timeToLive;
+
+};
+
+typedef SGSharedPtr<LiveMetarProperties> LiveMetarProperties_ptr;
+
+LiveMetarProperties::LiveMetarProperties( SGPropertyNode_ptr rootNode ) :
+ MetarProperties( rootNode ),
+ _timeToLive(0.0)
+{
+ _tiedProperties.Tie("time-to-live", &_timeToLive );
+}
+
+LiveMetarProperties::~LiveMetarProperties()
+{
+}
+
+void LiveMetarProperties::update( double dt )
+{
+ _timeToLive -= dt;
+ if( _timeToLive < 0.0 ) _timeToLive = 0.0;
+}
+
+/* -------------------------------------------------------------------------------- */
+
class BasicRealWxController : public RealWxController
{
public:
bool _enabled;
bool __enabled;
TiedPropertyList _tiedProperties;
- MetarProperties _metarProperties;
+ ; typedef std::vector<LiveMetarProperties_ptr> MetarPropertiesList;
+ MetarPropertiesList _metarProperties;
};
/* -------------------------------------------------------------------------------- */
_ground_elevation_n( fgGetNode( "/position/ground-elev-m", true )),
_max_age_n( fgGetNode( "/environment/params/metar-max-age-min", false ) ),
_enabled(true),
- __enabled(false),
- _metarProperties( fgGetNode( rootNode->getStringValue("metar", "/environment/metar"), true ) )
+ __enabled(false)
{
+ // at least instantiate MetarProperties for /environment/metar
+ _metarProperties.push_back( new LiveMetarProperties(
+ fgGetNode( rootNode->getStringValue("metar", "/environment/metar"), true ) ) );
+
+ PropertyList metars = rootNode->getChildren("metar");
+ for( PropertyList::size_type i = 1; i < metars.size(); i++ ) {
+ SG_LOG( SG_ALL, SG_INFO, "Adding metar properties at " << metars[i]->getStringValue() );
+ _metarProperties.push_back( new LiveMetarProperties(
+ fgGetNode( metars[i]->getStringValue(), true )));
+ }
}
BasicRealWxController::~BasicRealWxController()
void BasicRealWxController::update( double dt )
{
if( _enabled ) {
- update( !__enabled, dt );
+ bool firstIteration = !__enabled; // first iteration after being enabled?
+
+ // clock tick for every METAR in stock
+ for( MetarPropertiesList::iterator it = _metarProperties.begin();
+ it != _metarProperties.end(); it++ ) {
+ // first round? All received METARs are outdated
+ if( firstIteration ) (*it)->setTimeToLive( 0.0 );
+ (*it)->update(dt);
+ }
+
+ update( firstIteration, dt );
__enabled = true;
} else {
__enabled = false;
_proxyPort = fgGetNode("/sim/presets/proxy/port", true)->getStringValue();
_proxyAuth = fgGetNode("/sim/presets/proxy/authentication", true)->getStringValue();
}
+ MetarLoadRequest( const MetarLoadRequest & other ) {
+ _stationId = other._stationId;
+ _proxyHost = other._proxyAuth;
+ _proxyPort = other._proxyPort;
+ _proxyAuth = other._proxyAuth;
+ }
string _stationId;
string _proxyHost;
string _proxyPort;
string _proxyAuth;
private:
};
+
+ class MetarLoadResponse {
+ public:
+ MetarLoadResponse( const string & stationId, const string metar ) {
+ _stationId = stationId;
+ _metar = metar;
+ }
+ MetarLoadResponse( const MetarLoadResponse & other ) {
+ _stationId = other._stationId;
+ _metar = other._metar;
+ }
+ string _stationId;
+ string _metar;
+ };
private:
- double _metarTimeToLive;
double _positionTimeToLive;
- double _minimumRequestInterval;
-
- SGPropertyNode_ptr _metarDataNode;
- SGPropertyNode_ptr _metarValidNode;
- SGPropertyNode_ptr _metarStationIdNode;
-
+ double _requestTimer;
#if defined(ENABLE_THREADS)
class MetarLoadThread : public OpenThreads::Thread {
MetarLoadThread( long maxAge );
void requestMetar( const MetarLoadRequest & metarRequest, bool background = true );
bool hasMetar() { return _responseQueue.size() > 0; }
- string getMetar() { return _responseQueue.pop(); }
+ MetarLoadResponse getMetar() { return _responseQueue.pop(); }
virtual void run();
private:
void fetch( const MetarLoadRequest & );
long _maxAge;
+ long _minRequestInterval;
SGBlockingQueue <MetarLoadRequest> _requestQueue;
- SGBlockingQueue <string> _responseQueue;
+ SGBlockingQueue <MetarLoadResponse> _responseQueue;
};
MetarLoadThread * _metarLoadThread;
NoaaMetarRealWxController::NoaaMetarRealWxController( SGPropertyNode_ptr rootNode ) :
BasicRealWxController(rootNode),
- _metarTimeToLive(0.0),
_positionTimeToLive(0.0),
- _minimumRequestInterval(0.0),
- _metarDataNode(_metarProperties.get_root_node()->getNode("data",true)),
- _metarValidNode(_metarProperties.get_root_node()->getNode("valid",true)),
- _metarStationIdNode(_metarProperties.get_root_node()->getNode("station-id",true))
+ _requestTimer(0.0)
{
#if defined(ENABLE_THREADS)
_metarLoadThread = new MetarLoadThread(getMetarMaxAgeMin());
void NoaaMetarRealWxController::update( bool first, double dt )
{
- _metarTimeToLive -= dt;
_positionTimeToLive -= dt;
- _minimumRequestInterval -= dt;
-
- bool valid = _metarValidNode->getBoolValue();
- string stationId = valid ? _metarStationIdNode->getStringValue() : "";
+ _requestTimer -= dt;
- if( first ) _metarTimeToLive = 0.0;
-
- if( _metarTimeToLive <= 0.0 ) {
- valid = false;
- _metarTimeToLive = 900;
- _positionTimeToLive = 0;
- }
-
- if( _positionTimeToLive <= 0.0 || valid == false ) {
+ if( _positionTimeToLive <= 0.0 ) {
+ // check nearest airport
+ SG_LOG(SG_ALL, SG_INFO, "NoaaMetarRealWxController::update(): (re) checking nearby airport with METAR" );
_positionTimeToLive = 60.0;
SGGeod pos = SGGeod::fromDeg(_longitude_n->getDoubleValue(), _latitude_n->getDoubleValue());
return;
}
- if( stationId != nearestAirport->ident() ) {
- valid = false;
- stationId = nearestAirport->ident();
+ SG_LOG(SG_ALL, SG_INFO,
+ "NoaaMetarRealWxController::update(): nearest airport with METAR is: " << nearestAirport->ident() );
+
+ // if it has changed, invalidate the associated METAR
+ if( _metarProperties[0]->getStationId() != nearestAirport->ident() ) {
+ SG_LOG(SG_ALL, SG_INFO,
+ "NoaaMetarRealWxController::update(): nearest airport with METAR has changed. Old: '" <<
+ _metarProperties[0]->getStationId() <<
+ "', new: '" << nearestAirport->ident() << "'" );
+ _metarProperties[0]->setStationId( nearestAirport->ident() );
+ _metarProperties[0]->setTimeToLive( 0.0 );
}
-
}
-
- if( !valid ) {
- if( _minimumRequestInterval <= 0 && stationId.length() > 0 ) {
- MetarLoadRequest request( stationId );
- // load the first metar in the foreground to make sure a metar is received
- // before the automatic runway selection code runs. All subsequent calls
- // run in the background
- _metarLoadThread->requestMetar( request, !first );
- _minimumRequestInterval = 10;
+
+ if( _requestTimer <= 0.0 ) {
+ _requestTimer = 10.0;
+
+ for( MetarPropertiesList::iterator it = _metarProperties.begin();
+ it != _metarProperties.end(); it++ ) {
+
+ if( (*it)->getTimeToLive() > 0.0 ) continue;
+ const std::string & stationId = (*it)->getStationId();
+ if( stationId.empty() ) continue;
+
+ SG_LOG(SG_ALL, SG_INFO,
+ "NoaaMetarRealWxController::update(): spawning load request for station-id '" << stationId << "'" );
+
+ MetarLoadRequest request( stationId );
+ // load the metar for the neares airport in the foreground if the fdm is uninitialized
+ // to make sure a metar is received
+ // before the automatic runway selection code runs. All subsequent calls
+ // run in the background
+ bool background = fgGetBool("/sim/fdm-initialized", false ) || it != _metarProperties.begin();
+ _metarLoadThread->requestMetar( request, background );
}
}
- if( _metarLoadThread->hasMetar() ) {
- string metar = _metarLoadThread->getMetar();
- SG_LOG( SG_ALL, SG_ALERT, "NoaaMetarRwalWxController::update() received METAR " << metar );
- _metarDataNode->setStringValue( metar );
+ // pick all the received responses from the result queue and update the associated
+ // property tree
+ while( _metarLoadThread->hasMetar() ) {
+ MetarLoadResponse metar = _metarLoadThread->getMetar();
+ SG_LOG( SG_ALL, SG_INFO, "NoaaMetarRwalWxController::update() received METAR for " << metar._stationId << ": " << metar._metar );
+ for( MetarPropertiesList::iterator it = _metarProperties.begin();
+ it != _metarProperties.end(); it++ ) {
+ if( (*it)->getStationId() != metar._stationId )
+ continue;
+ (*it)->setTimeToLive(900);
+ (*it)->setMetar( metar._metar );
+ }
}
-
-
}
/* -------------------------------------------------------------------------------- */
#if defined(ENABLE_THREADS)
NoaaMetarRealWxController::MetarLoadThread::MetarLoadThread( long maxAge ) :
- _maxAge(maxAge)
+ _maxAge(maxAge),
+ _minRequestInterval(2000)
{
}
void NoaaMetarRealWxController::MetarLoadThread::run()
{
+ SGTimeStamp lastRun = SGTimeStamp::fromSec(0);
for( ;; ) {
+ SGTimeStamp dt = SGTimeStamp::now() - lastRun;
+
+ if( dt.getSeconds() * 1000 < _minRequestInterval )
+ microSleep( (_minRequestInterval - dt.getSeconds() * 1000 ) * 1000 );
+
+ lastRun = SGTimeStamp::now();
+
const MetarLoadRequest request = _requestQueue.pop();
if( request._stationId.size() == 0 )
break;
fetch( request );
+
}
}
try {
result = new FGMetar( request._stationId, request._proxyHost, request._proxyPort, request._proxyAuth );
+ _minRequestInterval = 2000;
} catch (const sg_io_exception& e) {
SG_LOG( SG_GENERAL, SG_WARN, "NoaaMetarRealWxController::fetchMetar(): can't get METAR for "
<< request._stationId << ":" << e.getFormattedMessage().c_str() );
+ _minRequestInterval += _minRequestInterval/2;
+ if( _minRequestInterval > 30000 )
+ _minRequestInterval = 30000;
return;
}
return;
}
- _responseQueue.push( metar );
+ MetarLoadResponse response( request._stationId, metar );
+ _responseQueue.push( response );
}
#endif
projects / flightgear.git / commitdiff