+ } // of runways iteration
+
+ return false;
+}
+
+unsigned int FGAirport::numTaxiways() const
+{
+ return mTaxiways.size();
+}
+
+FGRunway* FGAirport::getTaxiwayByIndex(unsigned int aIndex) const
+{
+ assert(aIndex >= 0 && aIndex < mTaxiways.size());
+ return mTaxiways[aIndex];
+}
+
+void FGAirport::addRunway(FGRunway* aRunway)
+{
+ aRunway->setAirport(this);
+
+ if (aRunway->isTaxiway()) {
+ mTaxiways.push_back(aRunway);
+ } else {
+ mRunways.push_back(aRunway);
+ }
+}
+
+FGRunway* FGAirport::getActiveRunwayForUsage() const
+{
+ static FGEnvironmentMgr* envMgr = NULL;
+ if (!envMgr) {
+ envMgr = (FGEnvironmentMgr *) globals->get_subsystem("environment");
+ }
+
+ FGEnvironment stationWeather(envMgr->getEnvironment(mPosition));
+
+ double windSpeed = stationWeather.get_wind_speed_kt();
+ double hdg = stationWeather.get_wind_from_heading_deg();
+ if (windSpeed <= 0.0) {
+ hdg = 270; // This forces West-facing rwys to be used in no-wind situations
+ // which is consistent with Flightgear's initial setup.
+ }
+
+ return findBestRunwayForHeading(hdg);
+}
+
+FGAirport* FGAirport::findClosest(const SGGeod& aPos, double aCuttofNm, Filter* filter)
+{
+ AirportFilter aptFilter;
+ if (filter == NULL) {
+ filter = &aptFilter;
+ }
+
+ FGPositionedRef r = FGPositioned::findClosest(aPos, aCuttofNm, filter);
+ if (!r) {
+ return NULL;
+ }
+
+ return static_cast<FGAirport*>(r.ptr());
+}
+
+FGAirport::HardSurfaceFilter::HardSurfaceFilter(double minLengthFt) :
+ mMinLengthFt(minLengthFt)
+{
+}
+
+bool FGAirport::HardSurfaceFilter::pass(FGPositioned* aPos) const
+{
+ if (aPos->type() != AIRPORT) {
+ return false; // exclude seaports and heliports as well, we need a runways
+ }
+
+ return static_cast<FGAirport*>(aPos)->hasHardRunwayOfLengthFt(mMinLengthFt);
+}
+
+/******************************************************************************
+ * FGAirportList
+ *****************************************************************************/
+
+// Populates a list of subdirectories of $FG_ROOT/Airports/AI so that
+// the add() method doesn't have to try opening 2 XML files in each of
+// thousands of non-existent directories. FIXME: should probably add
+// code to free this list after parsing of apt.dat is finished;
+// non-issue at the moment, however, as there are no AI subdirectories
+// in the base package.
+//
+// Note: 2005/12/23: This is probably not necessary anymore, because I'm
+// Switching to runtime airport dynamics loading (DT).
+FGAirportList::FGAirportList()
+{
+// ulDir* d;
+// ulDirEnt* dent;
+// SGPath aid( globals->get_fg_root() );
+// aid.append( "/Airports/AI" );
+// if((d = ulOpenDir(aid.c_str())) == NULL)
+// return;
+// while((dent = ulReadDir(d)) != NULL) {
+// SG_LOG( SG_GENERAL, SG_DEBUG, "Dent: " << dent->d_name );
+// ai_dirs.insert(dent->d_name);
+// }
+// ulCloseDir(d);
+}
+
+
+FGAirportList::~FGAirportList( void )
+{
+ for (unsigned int i = 0; i < airports_array.size(); ++i) {
+ delete airports_array[i];