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>
55 #include <Navaids/navrecord.hxx>
60 using namespace flightgear;
62 /***************************************************************************
64 ***************************************************************************/
66 AirportCache FGAirport::airportCache;
68 FGAirport::FGAirport( PositionedID aGuid,
69 const std::string &id,
70 const SGGeod& location,
71 const std::string &name,
74 FGPositioned(aGuid, aType, id, location),
76 _has_metar(has_metar),
78 mTowerDataLoaded(false),
79 mRunwaysLoaded(false),
80 mHelipadsLoaded(false),
81 mTaxiwaysLoaded(false),
82 mProceduresLoaded(false),
83 mThresholdDataLoaded(false),
89 FGAirport::~FGAirport()
94 bool FGAirport::isAirport() const
96 return type() == AIRPORT;
99 bool FGAirport::isSeaport() const
101 return type() == SEAPORT;
104 bool FGAirport::isHeliport() const
106 return type() == HELIPORT;
109 bool FGAirport::isAirportType(FGPositioned* pos)
115 return (pos->type() >= AIRPORT) && (pos->type() <= SEAPORT);
118 FGAirportDynamics * FGAirport::getDynamics()
124 _dynamics = new FGAirportDynamics(this);
125 XMLLoader::load(_dynamics);
128 FGRunwayPreference rwyPrefs(this);
129 XMLLoader::load(&rwyPrefs);
130 _dynamics->setRwyUse(rwyPrefs);
135 //------------------------------------------------------------------------------
136 unsigned int FGAirport::numRunways() const
139 return mRunways.size();
142 //------------------------------------------------------------------------------
143 unsigned int FGAirport::numHelipads() const
146 return mHelipads.size();
149 //------------------------------------------------------------------------------
150 FGRunwayRef FGAirport::getRunwayByIndex(unsigned int aIndex) const
153 return mRunways.at(aIndex);
156 //------------------------------------------------------------------------------
157 FGHelipadRef FGAirport::getHelipadByIndex(unsigned int aIndex) const
160 return loadById<FGHelipad>(mHelipads, aIndex);
163 //------------------------------------------------------------------------------
164 FGRunwayMap FGAirport::getRunwayMap() const
169 double minLengthFt = fgGetDouble("/sim/navdb/min-runway-length-ft");
171 BOOST_FOREACH(FGRunwayRef rwy, mRunways)
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
201 BOOST_FOREACH(FGRunwayRef rwy, mRunways) {
202 if (rwy->ident() == aIdent) {
210 //------------------------------------------------------------------------------
211 bool FGAirport::hasHelipadWithIdent(const std::string& aIdent) const
213 return flightgear::NavDataCache::instance()
214 ->airportItemWithIdent(guid(), FGPositioned::HELIPAD, aIdent) != 0;
217 //------------------------------------------------------------------------------
218 FGRunwayRef FGAirport::getRunwayByIdent(const std::string& aIdent) const
221 BOOST_FOREACH(FGRunwayRef rwy, mRunways) {
222 if (rwy->ident() == aIdent) {
227 SG_LOG(SG_GENERAL, SG_ALERT, "no such runway '" << aIdent << "' at airport " << ident());
228 throw sg_range_exception("unknown runway " + aIdent + " at airport:" + ident(), "FGAirport::getRunwayByIdent");
231 //------------------------------------------------------------------------------
232 FGHelipadRef FGAirport::getHelipadByIdent(const std::string& aIdent) const
234 PositionedID id = flightgear::NavDataCache::instance()->airportItemWithIdent(guid(), FGPositioned::HELIPAD, aIdent);
236 SG_LOG(SG_GENERAL, SG_ALERT, "no such helipad '" << aIdent << "' at airport " << ident());
237 throw sg_range_exception("unknown helipad " + aIdent + " at airport:" + ident(), "FGAirport::getRunwayByIdent");
240 return loadById<FGHelipad>(id);
243 //------------------------------------------------------------------------------
244 FGRunwayRef FGAirport::findBestRunwayForHeading(double aHeading, struct FindBestRunwayForHeadingParams * parms ) const
248 FGRunway* result = NULL;
249 double currentBestQuality = 0.0;
251 struct FindBestRunwayForHeadingParams fbrfhp;
252 if( NULL != parms ) fbrfhp = *parms;
254 SGPropertyNode_ptr searchNode = fgGetNode("/sim/airport/runways/search");
255 if( searchNode.valid() ) {
256 fbrfhp.lengthWeight = searchNode->getDoubleValue("length-weight", fbrfhp.lengthWeight );
257 fbrfhp.widthWeight = searchNode->getDoubleValue("width-weight", fbrfhp.widthWeight );
258 fbrfhp.surfaceWeight = searchNode->getDoubleValue("surface-weight", fbrfhp.surfaceWeight );
259 fbrfhp.deviationWeight = searchNode->getDoubleValue("deviation-weight", fbrfhp.deviationWeight );
260 fbrfhp.ilsWeight = searchNode->getDoubleValue("ils-weight", fbrfhp.ilsWeight );
263 BOOST_FOREACH(FGRunwayRef rwy, mRunways) {
264 double good = rwy->score( fbrfhp.lengthWeight, fbrfhp.widthWeight, fbrfhp.surfaceWeight, fbrfhp.ilsWeight );
265 double dev = aHeading - rwy->headingDeg();
266 SG_NORMALIZE_RANGE(dev, -180.0, 180.0);
267 double bad = fabs( fbrfhp.deviationWeight * dev) + 1e-20;
268 double quality = good / bad;
270 if (quality > currentBestQuality) {
271 currentBestQuality = quality;
279 //------------------------------------------------------------------------------
280 FGRunwayRef FGAirport::findBestRunwayForPos(const SGGeod& aPos) const
284 FGRunway* result = NULL;
285 double currentLowestDev = 180.0;
287 BOOST_FOREACH(FGRunwayRef rwy, mRunways) {
288 double inboundCourse = SGGeodesy::courseDeg(aPos, rwy->end());
289 double dev = inboundCourse - rwy->headingDeg();
290 SG_NORMALIZE_RANGE(dev, -180.0, 180.0);
293 if (dev < currentLowestDev) { // new best match
294 currentLowestDev = dev;
297 } // of runway iteration
303 //------------------------------------------------------------------------------
304 bool FGAirport::hasHardRunwayOfLengthFt(double aLengthFt) const
308 BOOST_FOREACH(FGRunwayRef rwy, mRunways) {
309 if (rwy->isHardSurface() && (rwy->lengthFt() >= aLengthFt)) {
310 return true; // we're done!
312 } // of runways iteration
317 //------------------------------------------------------------------------------
318 FGRunwayList FGAirport::getRunwaysWithoutReciprocals() const
324 BOOST_FOREACH(FGRunwayRef rwy, mRunways) {
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(geod()));
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 PositionedIDVec FGAirport::itemsOfType(FGPositioned::Type ty) const
507 flightgear::NavDataCache* cache = flightgear::NavDataCache::instance();
508 return cache->airportItemsOfType(guid(), ty);
511 void FGAirport::loadRunways() const
513 if (mRunwaysLoaded) {
514 return; // already loaded, great
517 loadSceneryDefinitions();
519 mRunwaysLoaded = true;
520 PositionedIDVec rwys(itemsOfType(FGPositioned::RUNWAY));
521 BOOST_FOREACH(PositionedID id, rwys) {
522 mRunways.push_back(loadById<FGRunway>(id));
526 void FGAirport::loadHelipads() const
528 if (mHelipadsLoaded) {
529 return; // already loaded, great
532 mHelipadsLoaded = true;
533 mHelipads = itemsOfType(FGPositioned::HELIPAD);
536 void FGAirport::loadTaxiways() const
538 if (mTaxiwaysLoaded) {
539 return; // already loaded, great
542 mTaxiwaysLoaded = true;
543 mTaxiways = itemsOfType(FGPositioned::TAXIWAY);
546 void FGAirport::loadProcedures() const
548 if (mProceduresLoaded) {
552 mProceduresLoaded = true;
554 if (!XMLLoader::findAirportData(ident(), "procedures", path)) {
555 SG_LOG(SG_GENERAL, SG_INFO, "no procedures data available for " << ident());
559 SG_LOG(SG_GENERAL, SG_INFO, ident() << ": loading procedures from " << path.str());
560 RouteBase::loadAirportProcedures(path, const_cast<FGAirport*>(this));
563 void FGAirport::loadSceneryDefinitions() const
565 if (mThresholdDataLoaded) {
569 mThresholdDataLoaded = true;
572 if (!XMLLoader::findAirportData(ident(), "threshold", path)) {
573 return; // no XML threshold data
577 SGPropertyNode_ptr rootNode = new SGPropertyNode;
578 readProperties(path.str(), rootNode);
579 const_cast<FGAirport*>(this)->readThresholdData(rootNode);
580 } catch (sg_exception& e) {
581 SG_LOG(SG_NAVAID, SG_WARN, ident() << "loading threshold XML failed:" << e.getFormattedMessage());
585 void FGAirport::readThresholdData(SGPropertyNode* aRoot)
587 SGPropertyNode* runway;
589 for (; (runway = aRoot->getChild("runway", runwayIndex)) != NULL; ++runwayIndex) {
590 SGPropertyNode* t0 = runway->getChild("threshold", 0),
591 *t1 = runway->getChild("threshold", 1);
593 assert(t1); // too strict? maybe we should finally allow single-ended runways
595 processThreshold(t0);
596 processThreshold(t1);
597 } // of runways iteration
600 void FGAirport::processThreshold(SGPropertyNode* aThreshold)
602 // first, let's identify the current runway
603 std::string rwyIdent(aThreshold->getStringValue("rwy"));
604 NavDataCache* cache = NavDataCache::instance();
605 PositionedID id = cache->airportItemWithIdent(guid(), FGPositioned::RUNWAY, rwyIdent);
607 double lon = aThreshold->getDoubleValue("lon"),
608 lat = aThreshold->getDoubleValue("lat");
609 SGGeod newThreshold(SGGeod::fromDegM(lon, lat, elevationM()));
611 double newHeading = aThreshold->getDoubleValue("hdg-deg");
612 double newDisplacedThreshold = aThreshold->getDoubleValue("displ-m");
613 double newStopway = aThreshold->getDoubleValue("stopw-m");
616 SG_LOG(SG_GENERAL, SG_DEBUG, "FGAirport::processThreshold: "
617 "found runway not defined in the global data:" << ident() << "/" << rwyIdent);
618 // enable this code when threshold.xml contains sufficient data to
619 // fully specify a new runway, *and* we figure out how to assign runtime
620 // Positioned IDs and insert temporary items into the spatial map.
622 double newLength = 0.0, newWidth = 0.0;
624 FGRunway* rwy = new FGRunway(id, guid(), rwyIdent, newThreshold,
627 newDisplacedThreshold, newStopway,
629 // insert into the spatial map too
630 mRunways.push_back(rwy);
633 FGRunway* rwy = loadById<FGRunway>(id);
634 rwy->updateThreshold(newThreshold, newHeading,
635 newDisplacedThreshold, newStopway);
640 SGGeod FGAirport::getTowerLocation() const
643 return mTowerPosition;
646 void FGAirport::validateTowerData() const
648 if (mTowerDataLoaded) {
652 mTowerDataLoaded = true;
654 // first, load data from the cache (apt.dat)
655 NavDataCache* cache = NavDataCache::instance();
656 PositionedIDVec towers = cache->airportItemsOfType(guid(), FGPositioned::TOWER);
657 if (towers.empty()) {
658 SG_LOG(SG_GENERAL, SG_ALERT, "No towers defined for:" <<ident());
659 mTowerPosition = geod(); // use airport position
660 // increase tower elevation by 20 metres above the field elevation
661 mTowerPosition.setElevationM(geod().getElevationM() + 20.0);
663 FGPositionedRef tower = cache->loadById(towers.front());
664 mTowerPosition = tower->geod();
668 if (!XMLLoader::findAirportData(ident(), "twr", path)) {
669 return; // no XML tower data, base position is fine
673 SGPropertyNode_ptr rootNode = new SGPropertyNode;
674 readProperties(path.str(), rootNode);
675 const_cast<FGAirport*>(this)->readTowerData(rootNode);
676 } catch (sg_exception& e){
677 SG_LOG(SG_NAVAID, SG_WARN, ident() << "loading twr XML failed:" << e.getFormattedMessage());
681 void FGAirport::readTowerData(SGPropertyNode* aRoot)
683 SGPropertyNode* twrNode = aRoot->getChild("tower")->getChild("twr");
684 double lat = twrNode->getDoubleValue("lat"),
685 lon = twrNode->getDoubleValue("lon"),
686 elevM = twrNode->getDoubleValue("elev-m");
687 // tower elevation is AGL, not AMSL. Since we don't want to depend on the
688 // scenery for a precise terrain elevation, we use the field elevation
689 // (this is also what the apt.dat code does)
690 double fieldElevationM = geod().getElevationM();
691 mTowerPosition = SGGeod::fromDegM(lon, lat, fieldElevationM + elevM);
694 void FGAirport::validateILSData()
696 if (mILSDataLoaded) {
700 // to avoid re-entrancy on this code-path, ensure we set loaded
702 mILSDataLoaded = true;
705 if (!XMLLoader::findAirportData(ident(), "ils", path)) {
706 return; // no XML tower data
710 SGPropertyNode_ptr rootNode = new SGPropertyNode;
711 readProperties(path.str(), rootNode);
712 readILSData(rootNode);
713 } catch (sg_exception& e){
714 SG_LOG(SG_NAVAID, SG_WARN, ident() << "loading ils XML failed:" << e.getFormattedMessage());
718 void FGAirport::readILSData(SGPropertyNode* aRoot)
720 NavDataCache* cache = NavDataCache::instance();
721 // find the entry matching the runway
722 SGPropertyNode* runwayNode, *ilsNode;
723 for (int i=0; (runwayNode = aRoot->getChild("runway", i)) != NULL; ++i) {
724 for (int j=0; (ilsNode = runwayNode->getChild("ils", j)) != NULL; ++j) {
725 // must match on both nav-ident and runway ident, to support the following:
726 // - runways with multiple distinct ILS installations (KEWD, for example)
727 // - runways where both ends share the same nav ident (LFAT, for example)
728 PositionedID ils = cache->findILS(guid(), ilsNode->getStringValue("rwy"),
729 ilsNode->getStringValue("nav-id"));
731 SG_LOG(SG_GENERAL, SG_INFO, "reading ILS data for " << ident() <<
732 ", couldn't find runway/navaid for:" <<
733 ilsNode->getStringValue("rwy") << "/" <<
734 ilsNode->getStringValue("nav-id"));
738 double hdgDeg = ilsNode->getDoubleValue("hdg-deg"),
739 lon = ilsNode->getDoubleValue("lon"),
740 lat = ilsNode->getDoubleValue("lat"),
741 elevM = ilsNode->getDoubleValue("elev-m");
743 FGNavRecordRef nav(FGPositioned::loadById<FGNavRecord>(ils));
745 nav->updateFromXML(SGGeod::fromDegM(lon, lat, elevM), hdgDeg);
746 } // of ILS iteration
747 } // of runway iteration
750 void FGAirport::addSID(flightgear::SID* aSid)
752 mSIDs.push_back(aSid);
755 void FGAirport::addSTAR(STAR* aStar)
757 mSTARs.push_back(aStar);
760 void FGAirport::addApproach(Approach* aApp)
762 mApproaches.push_back(aApp);
765 //------------------------------------------------------------------------------
766 unsigned int FGAirport::numSIDs() const
772 //------------------------------------------------------------------------------
773 flightgear::SID* FGAirport::getSIDByIndex(unsigned int aIndex) const
776 return mSIDs[aIndex];
779 //------------------------------------------------------------------------------
780 flightgear::SID* FGAirport::findSIDWithIdent(const std::string& aIdent) const
783 for (unsigned int i=0; i<mSIDs.size(); ++i) {
784 if (mSIDs[i]->ident() == aIdent) {
792 //------------------------------------------------------------------------------
793 flightgear::SIDList FGAirport::getSIDs() const
796 return flightgear::SIDList(mSIDs.begin(), mSIDs.end());
799 //------------------------------------------------------------------------------
800 unsigned int FGAirport::numSTARs() const
803 return mSTARs.size();
806 //------------------------------------------------------------------------------
807 STAR* FGAirport::getSTARByIndex(unsigned int aIndex) const
810 return mSTARs[aIndex];
813 //------------------------------------------------------------------------------
814 STAR* FGAirport::findSTARWithIdent(const std::string& aIdent) const
817 for (unsigned int i=0; i<mSTARs.size(); ++i) {
818 if (mSTARs[i]->ident() == aIdent) {
826 //------------------------------------------------------------------------------
827 STARList FGAirport::getSTARs() const
830 return STARList(mSTARs.begin(), mSTARs.end());
833 unsigned int FGAirport::numApproaches() const
836 return mApproaches.size();
839 //------------------------------------------------------------------------------
840 Approach* FGAirport::getApproachByIndex(unsigned int aIndex) const
843 return mApproaches[aIndex];
846 //------------------------------------------------------------------------------
847 Approach* FGAirport::findApproachWithIdent(const std::string& aIdent) const
850 for (unsigned int i=0; i<mApproaches.size(); ++i) {
851 if (mApproaches[i]->ident() == aIdent) {
852 return mApproaches[i];
859 //------------------------------------------------------------------------------
860 ApproachList FGAirport::getApproaches(ProcedureType type) const
863 if( type == PROCEDURE_INVALID )
864 return ApproachList(mApproaches.begin(), mApproaches.end());
867 for(size_t i = 0; i < mApproaches.size(); ++i)
869 if( mApproaches[i]->type() == type )
870 ret.push_back(mApproaches[i]);
876 FGAirport::commStations() const
878 NavDataCache* cache = NavDataCache::instance();
879 CommStationList result;
880 BOOST_FOREACH(PositionedID pos, cache->airportItemsOfType(guid(),
881 FGPositioned::FREQ_GROUND,
882 FGPositioned::FREQ_UNICOM))
884 result.push_back( loadById<CommStation>(pos) );
891 FGAirport::commStationsOfType(FGPositioned::Type aTy) const
893 NavDataCache* cache = NavDataCache::instance();
894 CommStationList result;
895 BOOST_FOREACH(PositionedID pos, cache->airportItemsOfType(guid(), aTy)) {
896 result.push_back( loadById<CommStation>(pos) );
902 class AirportWithSize
905 AirportWithSize(FGPositionedRef pos) :
909 assert(pos->type() == FGPositioned::AIRPORT);
910 FGAirport* apt = static_cast<FGAirport*>(pos.get());
911 BOOST_FOREACH(FGRunway* rwy, apt->getRunwaysWithoutReciprocals()) {
912 _sizeMetric += static_cast<int>(rwy->lengthFt());
916 bool operator<(const AirportWithSize& other) const
918 return _sizeMetric < other._sizeMetric;
921 FGPositionedRef pos() const
924 FGPositionedRef _pos;
925 unsigned int _sizeMetric;
929 void FGAirport::sortBySize(FGPositionedList& airportList)
931 std::vector<AirportWithSize> annotated;
932 BOOST_FOREACH(FGPositionedRef p, airportList) {
933 annotated.push_back(AirportWithSize(p));
935 std::sort(annotated.begin(), annotated.end());
937 for (unsigned int i=0; i<annotated.size(); ++i) {
938 airportList[i] = annotated[i].pos();
942 // get airport elevation
943 double fgGetAirportElev( const std::string& id )
945 const FGAirport *a=fgFindAirportID( id);
947 return a->getElevation();
954 // get airport position
955 SGGeod fgGetAirportPos( const std::string& id )
957 const FGAirport *a = fgFindAirportID( id);
960 return SGGeod::fromDegM(a->getLongitude(), a->getLatitude(), a->getElevation());
962 return SGGeod::fromDegM(0.0, 0.0, -9999.0);