2 // simple.cxx -- a really simplistic class to manage airport ID,
3 // lat, lon of the center of one of it's runways, and
6 // Written by Curtis Olson, started April 1998.
7 // Updated by Durk Talsma, started December, 2004.
9 // Copyright (C) 1998 Curtis L. Olson - http://www.flightgear.org/~curt
11 // This program is free software; you can redistribute it and/or
12 // modify it under the terms of the GNU General Public License as
13 // published by the Free Software Foundation; either version 2 of the
14 // License, or (at your option) any later version.
16 // This program is distributed in the hope that it will be useful, but
17 // WITHOUT ANY WARRANTY; without even the implied warranty of
18 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19 // General Public License for more details.
21 // You should have received a copy of the GNU General Public License
22 // along with this program; if not, write to the Free Software
23 // Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
31 #include "airport.hxx"
35 #include <boost/foreach.hpp>
37 #include <simgear/misc/sg_path.hxx>
38 #include <simgear/props/props.hxx>
39 #include <simgear/props/props_io.hxx>
40 #include <simgear/debug/logstream.hxx>
41 #include <simgear/sg_inlines.h>
42 #include <simgear/structure/exception.hxx>
44 #include <Environment/environment_mgr.hxx>
45 #include <Environment/environment.hxx>
46 #include <Main/fg_props.hxx>
47 #include <Airports/runways.hxx>
48 #include <Airports/pavement.hxx>
49 #include <Airports/dynamics.hxx>
50 #include <Airports/xmlloader.hxx>
51 #include <Navaids/procedure.hxx>
52 #include <Navaids/waypoint.hxx>
53 #include <ATC/CommStation.hxx>
54 #include <Navaids/NavDataCache.hxx>
59 using namespace flightgear;
61 /***************************************************************************
63 ***************************************************************************/
65 AirportCache FGAirport::airportCache;
67 FGAirport::FGAirport( PositionedID aGuid,
68 const std::string &id,
69 const SGGeod& location,
70 const std::string &name,
73 FGPositioned(aGuid, aType, id, location),
75 _has_metar(has_metar),
77 mTowerDataLoaded(false),
78 mRunwaysLoaded(false),
79 mHelipadsLoaded(false),
80 mTaxiwaysLoaded(false),
81 mProceduresLoaded(false),
87 FGAirport::~FGAirport()
92 bool FGAirport::isAirport() const
94 return type() == AIRPORT;
97 bool FGAirport::isSeaport() const
99 return type() == SEAPORT;
102 bool FGAirport::isHeliport() const
104 return type() == HELIPORT;
107 bool FGAirport::isAirportType(FGPositioned* pos)
113 return (pos->type() >= AIRPORT) && (pos->type() <= SEAPORT);
116 FGAirportDynamics * FGAirport::getDynamics()
122 _dynamics = new FGAirportDynamics(this);
123 XMLLoader::load(_dynamics);
126 FGRunwayPreference rwyPrefs(this);
127 XMLLoader::load(&rwyPrefs);
128 _dynamics->setRwyUse(rwyPrefs);
133 //------------------------------------------------------------------------------
134 unsigned int FGAirport::numRunways() const
137 return mRunways.size();
140 //------------------------------------------------------------------------------
141 unsigned int FGAirport::numHelipads() const
144 return mHelipads.size();
147 //------------------------------------------------------------------------------
148 FGRunwayRef FGAirport::getRunwayByIndex(unsigned int aIndex) const
151 return loadById<FGRunway>(mRunways, aIndex);
154 //------------------------------------------------------------------------------
155 FGHelipadRef FGAirport::getHelipadByIndex(unsigned int aIndex) const
158 return loadById<FGHelipad>(mHelipads, aIndex);
161 //------------------------------------------------------------------------------
162 FGRunwayMap FGAirport::getRunwayMap() const
167 double minLengthFt = fgGetDouble("/sim/navdb/min-runway-length-ft");
169 BOOST_FOREACH(PositionedID id, mRunways)
171 FGRunway* rwy = loadById<FGRunway>(id);
173 // ignore unusably short runways
174 // TODO other methods don't check this...
175 if( rwy->lengthFt() >= minLengthFt )
176 map[ rwy->ident() ] = rwy;
182 //------------------------------------------------------------------------------
183 FGHelipadMap FGAirport::getHelipadMap() const
188 BOOST_FOREACH(PositionedID id, mHelipads)
190 FGHelipad* rwy = loadById<FGHelipad>(id);
191 map[ rwy->ident() ] = rwy;
197 //------------------------------------------------------------------------------
198 bool FGAirport::hasRunwayWithIdent(const std::string& aIdent) const
200 return flightgear::NavDataCache::instance()
201 ->airportItemWithIdent(guid(), FGPositioned::RUNWAY, aIdent) != 0;
204 //------------------------------------------------------------------------------
205 bool FGAirport::hasHelipadWithIdent(const std::string& aIdent) const
207 return flightgear::NavDataCache::instance()
208 ->airportItemWithIdent(guid(), FGPositioned::HELIPAD, aIdent) != 0;
211 //------------------------------------------------------------------------------
212 FGRunwayRef FGAirport::getRunwayByIdent(const std::string& aIdent) const
215 flightgear::NavDataCache::instance()
216 ->airportItemWithIdent(guid(), FGPositioned::RUNWAY, aIdent);
219 SG_LOG(SG_GENERAL, SG_ALERT, "no such runway '" << aIdent << "' at airport " << ident());
220 throw sg_range_exception("unknown runway " + aIdent + " at airport:" + ident(), "FGAirport::getRunwayByIdent");
223 return loadById<FGRunway>(id);
226 //------------------------------------------------------------------------------
227 FGHelipadRef FGAirport::getHelipadByIdent(const std::string& aIdent) const
229 PositionedID id = flightgear::NavDataCache::instance()->airportItemWithIdent(guid(), FGPositioned::HELIPAD, aIdent);
231 SG_LOG(SG_GENERAL, SG_ALERT, "no such helipad '" << aIdent << "' at airport " << ident());
232 throw sg_range_exception("unknown helipad " + aIdent + " at airport:" + ident(), "FGAirport::getRunwayByIdent");
235 return loadById<FGHelipad>(id);
238 //------------------------------------------------------------------------------
239 FGRunwayRef FGAirport::findBestRunwayForHeading(double aHeading) const
243 FGRunway* result = NULL;
244 double currentBestQuality = 0.0;
246 SGPropertyNode *param = fgGetNode("/sim/airport/runways/search", true);
247 double lengthWeight = param->getDoubleValue("length-weight", 0.01);
248 double widthWeight = param->getDoubleValue("width-weight", 0.01);
249 double surfaceWeight = param->getDoubleValue("surface-weight", 10);
250 double deviationWeight = param->getDoubleValue("deviation-weight", 1);
252 BOOST_FOREACH(PositionedID id, mRunways) {
253 FGRunway* rwy = loadById<FGRunway>(id);
254 // bug http://code.google.com/p/flightgear-bugs/issues/detail?id=1149
255 // (and probably some other issues besides).
256 if (rwy->type() == FGPositioned::HELIPAD) {
260 double good = rwy->score(lengthWeight, widthWeight, surfaceWeight);
261 double dev = aHeading - rwy->headingDeg();
262 SG_NORMALIZE_RANGE(dev, -180.0, 180.0);
263 double bad = fabs(deviationWeight * dev) + 1e-20;
264 double quality = good / bad;
266 if (quality > currentBestQuality) {
267 currentBestQuality = quality;
275 //------------------------------------------------------------------------------
276 FGRunwayRef FGAirport::findBestRunwayForPos(const SGGeod& aPos) const
280 FGRunway* result = NULL;
281 double currentLowestDev = 180.0;
283 BOOST_FOREACH(PositionedID id, mRunways) {
284 FGRunway* rwy = loadById<FGRunway>(id);
286 double inboundCourse = SGGeodesy::courseDeg(aPos, rwy->end());
287 double dev = inboundCourse - rwy->headingDeg();
288 SG_NORMALIZE_RANGE(dev, -180.0, 180.0);
291 if (dev < currentLowestDev) { // new best match
292 currentLowestDev = dev;
295 } // of runway iteration
301 //------------------------------------------------------------------------------
302 bool FGAirport::hasHardRunwayOfLengthFt(double aLengthFt) const
306 BOOST_FOREACH(PositionedID id, mRunways) {
307 FGRunway* rwy = loadById<FGRunway>(id);
308 if (rwy->isHardSurface() && (rwy->lengthFt() >= aLengthFt)) {
309 return true; // we're done!
311 } // of runways iteration
316 //------------------------------------------------------------------------------
317 FGRunwayList FGAirport::getRunwaysWithoutReciprocals() const
323 BOOST_FOREACH(PositionedID id, mRunways) {
324 FGRunway* rwy = loadById<FGRunway>(id);
325 FGRunway* recip = rwy->reciprocalRunway();
327 FGRunwayList::iterator it = std::find(r.begin(), r.end(), recip);
329 continue; // reciprocal already in result set, don't include us
339 //------------------------------------------------------------------------------
340 unsigned int FGAirport::numTaxiways() const
343 return mTaxiways.size();
346 //------------------------------------------------------------------------------
347 FGTaxiwayRef FGAirport::getTaxiwayByIndex(unsigned int aIndex) const
350 return loadById<FGTaxiway>(mTaxiways, aIndex);
353 //------------------------------------------------------------------------------
354 FGTaxiwayList FGAirport::getTaxiways() const
357 return loadAllById<FGTaxiway>(mTaxiways);
360 //------------------------------------------------------------------------------
361 unsigned int FGAirport::numPavements() const
364 return mPavements.size();
367 //------------------------------------------------------------------------------
368 FGPavementRef FGAirport::getPavementByIndex(unsigned int aIndex) const
371 return loadById<FGPavement>(mPavements, aIndex);
374 //------------------------------------------------------------------------------
375 FGPavementList FGAirport::getPavements() const
378 return loadAllById<FGPavement>(mPavements);
381 //------------------------------------------------------------------------------
382 FGRunwayRef FGAirport::getActiveRunwayForUsage() const
384 FGEnvironmentMgr* envMgr = (FGEnvironmentMgr *) globals->get_subsystem("environment");
386 // This forces West-facing rwys to be used in no-wind situations
387 // which is consistent with Flightgear's initial setup.
391 FGEnvironment stationWeather(envMgr->getEnvironment(mPosition));
393 double windSpeed = stationWeather.get_wind_speed_kt();
394 if (windSpeed > 0.0) {
395 hdg = stationWeather.get_wind_from_heading_deg();
399 return findBestRunwayForHeading(hdg);
402 //------------------------------------------------------------------------------
403 FGAirportRef FGAirport::findClosest( const SGGeod& aPos,
407 AirportFilter aptFilter;
411 return static_pointer_cast<FGAirport>
413 FGPositioned::findClosest(aPos, aCuttofNm, filter)
417 FGAirport::HardSurfaceFilter::HardSurfaceFilter(double minLengthFt) :
418 mMinLengthFt(minLengthFt)
420 if (minLengthFt < 0.0) {
421 mMinLengthFt = fgGetDouble("/sim/navdb/min-runway-length-ft", 0.0);
425 bool FGAirport::HardSurfaceFilter::passAirport(FGAirport* aApt) const
427 return aApt->hasHardRunwayOfLengthFt(mMinLengthFt);
430 //------------------------------------------------------------------------------
431 FGAirport::TypeRunwayFilter::TypeRunwayFilter():
432 _type(FGPositioned::AIRPORT),
433 _min_runway_length_ft( fgGetDouble("/sim/navdb/min-runway-length-ft", 0.0) )
438 //------------------------------------------------------------------------------
439 bool FGAirport::TypeRunwayFilter::fromTypeString(const std::string& type)
441 if( type == "heliport" ) _type = FGPositioned::HELIPORT;
442 else if( type == "seaport" ) _type = FGPositioned::SEAPORT;
443 else if( type == "airport" ) _type = FGPositioned::AIRPORT;
449 //------------------------------------------------------------------------------
450 bool FGAirport::TypeRunwayFilter::pass(FGPositioned* pos) const
452 FGAirport* apt = static_cast<FGAirport*>(pos);
453 if( (apt->type() == FGPositioned::AIRPORT)
454 && !apt->hasHardRunwayOfLengthFt(_min_runway_length_ft)
461 //------------------------------------------------------------------------------
462 FGAirportRef FGAirport::findByIdent(const std::string& aIdent)
464 AirportCache::iterator it = airportCache.find(aIdent);
465 if (it != airportCache.end())
469 FGAirportRef r = static_pointer_cast<FGAirport>
471 FGPositioned::findFirstWithIdent(aIdent, &filter)
474 // add airport to the cache (even when it's NULL, so we don't need to search in vain again)
475 airportCache[aIdent] = r;
477 // we don't warn here when r==NULL, let the caller do that
481 //------------------------------------------------------------------------------
482 FGAirportRef FGAirport::getByIdent(const std::string& aIdent)
484 FGAirportRef r = findByIdent(aIdent);
486 throw sg_range_exception("No such airport with ident: " + aIdent);
490 char** FGAirport::searchNamesAndIdents(const std::string& aFilter)
492 return NavDataCache::instance()->searchAirportNamesAndIdents(aFilter);
495 // find basic airport location info from airport database
496 const FGAirport *fgFindAirportID( const std::string& id)
502 return FGAirport::findByIdent(id);
505 void FGAirport::loadRunways() const
507 if (mRunwaysLoaded) {
508 return; // already loaded, great
511 loadSceneryDefinitions();
513 mRunwaysLoaded = true;
514 mRunways = flightgear::NavDataCache::instance()->airportItemsOfType(guid(), FGPositioned::RUNWAY);
517 void FGAirport::loadHelipads() const
519 if (mHelipadsLoaded) {
520 return; // already loaded, great
523 loadSceneryDefinitions();
525 mHelipadsLoaded = true;
526 mHelipads = flightgear::NavDataCache::instance()->airportItemsOfType(guid(), FGPositioned::HELIPAD);
529 void FGAirport::loadTaxiways() const
531 if (mTaxiwaysLoaded) {
532 return; // already loaded, great
535 mTaxiwaysLoaded = true;
536 mTaxiways = flightgear::NavDataCache::instance()->airportItemsOfType(guid(), FGPositioned::TAXIWAY);
539 void FGAirport::loadProcedures() const
541 if (mProceduresLoaded) {
545 mProceduresLoaded = true;
547 if (!XMLLoader::findAirportData(ident(), "procedures", path)) {
548 SG_LOG(SG_GENERAL, SG_INFO, "no procedures data available for " << ident());
552 SG_LOG(SG_GENERAL, SG_INFO, ident() << ": loading procedures from " << path.str());
553 RouteBase::loadAirportProcedures(path, const_cast<FGAirport*>(this));
556 void FGAirport::loadSceneryDefinitions() const
558 NavDataCache* cache = NavDataCache::instance();
560 if (!XMLLoader::findAirportData(ident(), "threshold", path)) {
561 return; // no XML threshold data
564 if (!cache->isCachedFileModified(path)) {
565 // cached values are correct, we're all done
569 flightgear::NavDataCache::Transaction txn(cache);
570 SGPropertyNode_ptr rootNode = new SGPropertyNode;
571 readProperties(path.str(), rootNode);
572 const_cast<FGAirport*>(this)->readThresholdData(rootNode);
573 cache->stampCacheFile(path);
577 void FGAirport::readThresholdData(SGPropertyNode* aRoot)
579 SGPropertyNode* runway;
581 for (; (runway = aRoot->getChild("runway", runwayIndex)) != NULL; ++runwayIndex) {
582 SGPropertyNode* t0 = runway->getChild("threshold", 0),
583 *t1 = runway->getChild("threshold", 1);
585 assert(t1); // too strict? maybe we should finally allow single-ended runways
587 processThreshold(t0);
588 processThreshold(t1);
589 } // of runways iteration
592 void FGAirport::processThreshold(SGPropertyNode* aThreshold)
594 // first, let's identify the current runway
595 std::string rwyIdent(aThreshold->getStringValue("rwy"));
596 NavDataCache* cache = NavDataCache::instance();
597 PositionedID id = cache->airportItemWithIdent(guid(), FGPositioned::RUNWAY, rwyIdent);
599 SG_LOG(SG_GENERAL, SG_DEBUG, "FGAirport::processThreshold: "
600 "found runway not defined in the global data:" << ident() << "/" << rwyIdent);
604 double lon = aThreshold->getDoubleValue("lon"),
605 lat = aThreshold->getDoubleValue("lat");
606 SGGeod newThreshold(SGGeod::fromDegM(lon, lat, mPosition.getElevationM()));
608 double newHeading = aThreshold->getDoubleValue("hdg-deg");
609 double newDisplacedThreshold = aThreshold->getDoubleValue("displ-m");
610 double newStopway = aThreshold->getDoubleValue("stopw-m");
612 cache->updateRunwayThreshold(id, newThreshold,
613 newHeading, newDisplacedThreshold, newStopway);
616 SGGeod FGAirport::getTowerLocation() const
620 NavDataCache* cache = NavDataCache::instance();
621 PositionedIDVec towers = cache->airportItemsOfType(guid(), FGPositioned::TOWER);
622 if (towers.empty()) {
623 SG_LOG(SG_GENERAL, SG_ALERT, "No towers defined for:" <<ident());
627 FGPositionedRef tower = cache->loadById(towers.front());
628 return tower->geod();
631 void FGAirport::validateTowerData() const
633 if (mTowerDataLoaded) {
637 mTowerDataLoaded = true;
638 NavDataCache* cache = NavDataCache::instance();
640 if (!XMLLoader::findAirportData(ident(), "twr", path)) {
641 return; // no XML tower data
644 if (!cache->isCachedFileModified(path)) {
645 // cached values are correct, we're all done
649 flightgear::NavDataCache::Transaction txn(cache);
650 SGPropertyNode_ptr rootNode = new SGPropertyNode;
651 readProperties(path.str(), rootNode);
652 const_cast<FGAirport*>(this)->readTowerData(rootNode);
653 cache->stampCacheFile(path);
657 void FGAirport::readTowerData(SGPropertyNode* aRoot)
659 SGPropertyNode* twrNode = aRoot->getChild("tower")->getChild("twr");
660 double lat = twrNode->getDoubleValue("lat"),
661 lon = twrNode->getDoubleValue("lon"),
662 elevM = twrNode->getDoubleValue("elev-m");
663 // tower elevation is AGL, not AMSL. Since we don't want to depend on the
664 // scenery for a precise terrain elevation, we use the field elevation
665 // (this is also what the apt.dat code does)
666 double fieldElevationM = geod().getElevationM();
667 SGGeod towerLocation(SGGeod::fromDegM(lon, lat, fieldElevationM + elevM));
669 NavDataCache* cache = NavDataCache::instance();
670 PositionedIDVec towers = cache->airportItemsOfType(guid(), FGPositioned::TOWER);
671 if (towers.empty()) {
672 cache->insertTower(guid(), towerLocation);
674 // update the position
675 cache->updatePosition(towers.front(), towerLocation);
679 bool FGAirport::validateILSData()
681 if (mILSDataLoaded) {
685 mILSDataLoaded = true;
686 NavDataCache* cache = NavDataCache::instance();
688 if (!XMLLoader::findAirportData(ident(), "ils", path)) {
689 return false; // no XML tower data
692 if (!cache->isCachedFileModified(path)) {
693 // cached values are correct, we're all done
697 SGPropertyNode_ptr rootNode = new SGPropertyNode;
698 readProperties(path.str(), rootNode);
700 flightgear::NavDataCache::Transaction txn(cache);
701 readILSData(rootNode);
702 cache->stampCacheFile(path);
705 // we loaded data, tell the caller it might need to reload things
709 void FGAirport::readILSData(SGPropertyNode* aRoot)
711 NavDataCache* cache = NavDataCache::instance();
713 // find the entry matching the runway
714 SGPropertyNode* runwayNode, *ilsNode;
715 for (int i=0; (runwayNode = aRoot->getChild("runway", i)) != NULL; ++i) {
716 for (int j=0; (ilsNode = runwayNode->getChild("ils", j)) != NULL; ++j) {
717 // must match on both nav-ident and runway ident, to support the following:
718 // - runways with multiple distinct ILS installations (KEWD, for example)
719 // - runways where both ends share the same nav ident (LFAT, for example)
720 PositionedID ils = cache->findILS(guid(), ilsNode->getStringValue("rwy"),
721 ilsNode->getStringValue("nav-id"));
723 SG_LOG(SG_GENERAL, SG_INFO, "reading ILS data for " << ident() <<
724 ", couldn;t find runway/navaid for:" <<
725 ilsNode->getStringValue("rwy") << "/" <<
726 ilsNode->getStringValue("nav-id"));
730 double hdgDeg = ilsNode->getDoubleValue("hdg-deg"),
731 lon = ilsNode->getDoubleValue("lon"),
732 lat = ilsNode->getDoubleValue("lat"),
733 elevM = ilsNode->getDoubleValue("elev-m");
735 cache->updateILS(ils, SGGeod::fromDegM(lon, lat, elevM), hdgDeg);
736 } // of ILS iteration
737 } // of runway iteration
740 void FGAirport::addSID(flightgear::SID* aSid)
742 mSIDs.push_back(aSid);
745 void FGAirport::addSTAR(STAR* aStar)
747 mSTARs.push_back(aStar);
750 void FGAirport::addApproach(Approach* aApp)
752 mApproaches.push_back(aApp);
755 //------------------------------------------------------------------------------
756 unsigned int FGAirport::numSIDs() const
762 //------------------------------------------------------------------------------
763 flightgear::SID* FGAirport::getSIDByIndex(unsigned int aIndex) const
766 return mSIDs[aIndex];
769 //------------------------------------------------------------------------------
770 flightgear::SID* FGAirport::findSIDWithIdent(const std::string& aIdent) const
773 for (unsigned int i=0; i<mSIDs.size(); ++i) {
774 if (mSIDs[i]->ident() == aIdent) {
782 //------------------------------------------------------------------------------
783 flightgear::SIDList FGAirport::getSIDs() const
786 return flightgear::SIDList(mSIDs.begin(), mSIDs.end());
789 //------------------------------------------------------------------------------
790 unsigned int FGAirport::numSTARs() const
793 return mSTARs.size();
796 //------------------------------------------------------------------------------
797 STAR* FGAirport::getSTARByIndex(unsigned int aIndex) const
800 return mSTARs[aIndex];
803 //------------------------------------------------------------------------------
804 STAR* FGAirport::findSTARWithIdent(const std::string& aIdent) const
807 for (unsigned int i=0; i<mSTARs.size(); ++i) {
808 if (mSTARs[i]->ident() == aIdent) {
816 //------------------------------------------------------------------------------
817 STARList FGAirport::getSTARs() const
820 return STARList(mSTARs.begin(), mSTARs.end());
823 unsigned int FGAirport::numApproaches() const
826 return mApproaches.size();
829 //------------------------------------------------------------------------------
830 Approach* FGAirport::getApproachByIndex(unsigned int aIndex) const
833 return mApproaches[aIndex];
836 //------------------------------------------------------------------------------
837 Approach* FGAirport::findApproachWithIdent(const std::string& aIdent) const
840 for (unsigned int i=0; i<mApproaches.size(); ++i) {
841 if (mApproaches[i]->ident() == aIdent) {
842 return mApproaches[i];
849 //------------------------------------------------------------------------------
850 ApproachList FGAirport::getApproaches(ProcedureType type) const
853 if( type == PROCEDURE_INVALID )
854 return ApproachList(mApproaches.begin(), mApproaches.end());
857 for(size_t i = 0; i < mApproaches.size(); ++i)
859 if( mApproaches[i]->type() == type )
860 ret.push_back(mApproaches[i]);
866 FGAirport::commStations() const
868 NavDataCache* cache = NavDataCache::instance();
869 CommStationList result;
870 BOOST_FOREACH(PositionedID pos, cache->airportItemsOfType(guid(),
871 FGPositioned::FREQ_GROUND,
872 FGPositioned::FREQ_UNICOM))
874 result.push_back( loadById<CommStation>(pos) );
881 FGAirport::commStationsOfType(FGPositioned::Type aTy) const
883 NavDataCache* cache = NavDataCache::instance();
884 CommStationList result;
885 BOOST_FOREACH(PositionedID pos, cache->airportItemsOfType(guid(), aTy)) {
886 result.push_back( loadById<CommStation>(pos) );
892 class AirportWithSize
895 AirportWithSize(FGPositionedRef pos) :
899 assert(pos->type() == FGPositioned::AIRPORT);
900 FGAirport* apt = static_cast<FGAirport*>(pos.get());
901 BOOST_FOREACH(FGRunway* rwy, apt->getRunwaysWithoutReciprocals()) {
902 _sizeMetric += static_cast<int>(rwy->lengthFt());
906 bool operator<(const AirportWithSize& other) const
908 return _sizeMetric < other._sizeMetric;
911 FGPositionedRef pos() const
914 FGPositionedRef _pos;
915 unsigned int _sizeMetric;
919 void FGAirport::sortBySize(FGPositionedList& airportList)
921 std::vector<AirportWithSize> annotated;
922 BOOST_FOREACH(FGPositionedRef p, airportList) {
923 annotated.push_back(AirportWithSize(p));
925 std::sort(annotated.begin(), annotated.end());
927 for (unsigned int i=0; i<annotated.size(); ++i) {
928 airportList[i] = annotated[i].pos();
932 // get airport elevation
933 double fgGetAirportElev( const std::string& id )
935 const FGAirport *a=fgFindAirportID( id);
937 return a->getElevation();
944 // get airport position
945 SGGeod fgGetAirportPos( const std::string& id )
947 const FGAirport *a = fgFindAirportID( id);
950 return SGGeod::fromDegM(a->getLongitude(), a->getLatitude(), a->getElevation());
952 return SGGeod::fromDegM(0.0, 0.0, -9999.0);