// $Id$
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
#include <simgear/debug/logstream.hxx>
-#include <simgear/misc/fgstream.hxx>
-#include <simgear/math/fg_geodesy.hxx>
+#include <simgear/misc/sgstream.hxx>
+#include <simgear/math/sg_geodesy.hxx>
+#include "mkrbeacons.hxx"
#include "ilslist.hxx"
+FGILSList *current_ilslist;
+
+
// Constructor
FGILSList::FGILSList( void ) {
}
// load the navaids and build the map
-bool FGILSList::init( FGPath path ) {
- FGILS ils;
+bool FGILSList::init( SGPath path ) {
ilslist.erase( ilslist.begin(), ilslist.end() );
- fg_gzifstream in( path.str() );
+ sg_gzifstream in( path.str() );
if ( !in.is_open() ) {
- FG_LOG( FG_GENERAL, FG_ALERT, "Cannot open file: " << path.str() );
+ SG_LOG( SG_GENERAL, SG_ALERT, "Cannot open file: " << path.str() );
exit(-1);
}
in >> skipeol;
in >> skipcomment;
-#ifdef __MWERKS__
+ // double min = 1000000.0;
+ // double max = 0.0;
+#ifdef __MWERKS__
char c = 0;
- while ( in.get(c) && c != '\0' && n.get_ilstype() != '[' ) {
+ while ( in.get(c) && c != '\0' ) {
in.putback(c);
- in >> ils;
- if ( ils.get_type() != '[' ) {
- ilslist[ils.get_locfreq()].push_back(ils);
- }
- in >> skipcomment;
- }
-
#else
+ while ( ! in.eof() ) {
+#endif
+
+ FGILS *ils = new FGILS;
+ in >> (*ils);
+ if ( ils->get_ilstype() == '[' ) {
+ break;
+ }
+
+ /* cout << "typename = " << ils.get_ilstypename() << endl;
+ cout << " aptcode = " << ils.get_aptcode() << endl;
+ cout << " twyno = " << ils.get_rwyno() << endl;
+ cout << " locfreq = " << ils.get_locfreq() << endl;
+ cout << " locident = " << ils.get_locident() << endl << endl; */
+
+ ilslist[ils->get_locfreq()].push_back(ils);
+ in >> skipcomment;
- while ( ! in.eof() && ils.get_ilstype() != '[' ) {
- in >> ils;
- /* cout << "id = " << n.get_ident() << endl;
- cout << " type = " << n.get_type() << endl;
- cout << " lon = " << n.get_lon() << endl;
- cout << " lat = " << n.get_lat() << endl;
- cout << " elev = " << n.get_elev() << endl;
- cout << " freq = " << n.get_freq() << endl;
- cout << " range = " << n.get_range() << endl; */
- if ( ils.get_ilstype() != '[' ) {
- ilslist[ils.get_locfreq()].push_back(ils);
+ /* if ( ils.get_locfreq() < min ) {
+ min = ils.get_locfreq();
+ }
+ if ( ils.get_locfreq() > max ) {
+ max = ils.get_locfreq();
+ } */
+
+ // update the marker beacon list
+ if ( fabs(ils->get_omlon()) > SG_EPSILON ||
+ fabs(ils->get_omlat()) > SG_EPSILON ) {
+ current_beacons->add( ils->get_omlon(), ils->get_omlat(),
+ ils->get_gselev(), FGMkrBeacon::OUTER );
+ }
+ if ( fabs(ils->get_mmlon()) > SG_EPSILON ||
+ fabs(ils->get_mmlat()) > SG_EPSILON ) {
+ current_beacons->add( ils->get_mmlon(), ils->get_mmlat(),
+ ils->get_gselev(), FGMkrBeacon::MIDDLE );
+ }
+ if ( fabs(ils->get_imlon()) > SG_EPSILON ||
+ fabs(ils->get_imlat()) > SG_EPSILON ) {
+ current_beacons->add( ils->get_imlon(), ils->get_imlat(),
+ ils->get_gselev(), FGMkrBeacon::INNER );
}
- in >> skipcomment;
}
-#endif
+ // cout << "min freq = " << min << endl;
+ // cout << "max freq = " << max << endl;
return true;
}
-// query the database for the specified frequency, lon and lat are in
-// degrees, elev is in meters
-bool FGILSList::query( double lon, double lat, double elev, double freq,
- FGILS *ils, double *heading, double *dist )
+// Query the database for the specified frequency. It is assumed that
+// there will be multiple stations with matching frequencies so a
+// position must be specified. Lon and lat are in degrees, elev is in
+// meters.
+FGILS *FGILSList::findByFreq( double freq,
+ double lon, double lat, double elev )
{
- ils_list_type stations = ilslist[(int)(freq*100.0)];
+ FGILS *ils = NULL;
+
+ ils_list_type stations = ilslist[(int)(freq*100.0 + 0.5)];
+
+ double best_angle = 362.0;
+
+ // double az1, az2, s;
+ Point3D aircraft = sgGeodToCart( Point3D(lon, lat, elev) );
+ Point3D station;
+ double d2;
+ for ( unsigned int i = 0; i < stations.size(); ++i ) {
+ // cout << " testing " << current->get_locident() << endl;
+ station = Point3D(stations[i]->get_x(),
+ stations[i]->get_y(),
+ stations[i]->get_z());
+ // cout << " aircraft = " << aircraft << " station = " << station
+ // << endl;
+
+ d2 = aircraft.distance3Dsquared( station );
+ // cout << " distance = " << d << " ("
+ // << FG_ILS_DEFAULT_RANGE * SG_NM_TO_METER
+ // * FG_ILS_DEFAULT_RANGE * SG_NM_TO_METER
+ // << ")" << endl;
- ils_list_iterator current = stations.begin();
- ils_list_iterator last = stations.end();
-
- double az1, az2, s;
- for ( ; current != last ; ++current ) {
- // cout << "testing " << current->get_ident() << endl;
- geo_inverse_wgs_84( elev, lat, lon,
- current->get_loclat(), current->get_loclon(),
- &az1, &az2, &s );
// cout << " dist = " << s << endl;
- if ( s < ( FG_ILS_DEFAULT_RANGE * NM_TO_METER ) ) {
- *ils = *current;
- *heading = az2;
- *dist = s;
- return true;
+
+ // match up to twice the published range so we can model
+ // reduced signal strength. The assumption is that there will
+ // be maximum of two possbile stations of a particular
+ // frequency in range. If two exist, one will be associated
+ // with each end of the runway. In this case, pick the
+ // station pointing most directly at us.
+ if ( d2 < (2* FG_ILS_DEFAULT_RANGE * SG_NM_TO_METER
+ * 2 * FG_ILS_DEFAULT_RANGE * SG_NM_TO_METER) ) {
+
+ // Get our bearing from this station.
+ double reciprocal_bearing, dummy;
+ double a_lat_deg = lat * SGD_RADIANS_TO_DEGREES;
+ double a_lon_deg = lon * SGD_RADIANS_TO_DEGREES;
+ // Locator beam direction
+ double s_ils_deg = stations[i]->get_locheading() - 180.0;
+ if ( s_ils_deg < 0.0 ) { s_ils_deg += 360.0; }
+ double angle_to_beam_deg;
+
+ // printf("**ALI geting geo_inverse_wgs_84 with elev = %.2f, a.lat = %.2f, a.lon = %.2f,
+ // s.lat = %.2f, s.lon = %.2f\n", elev,a_lat_deg,a_lon_deg,stations[i]->get_loclat(),stations[i]->get_loclon());
+
+ geo_inverse_wgs_84( elev, stations[i]->get_loclat(),
+ stations[i]->get_loclon(), a_lat_deg, a_lon_deg,
+ &reciprocal_bearing, &dummy, &dummy );
+ angle_to_beam_deg = fabs(reciprocal_bearing - s_ils_deg);
+ if ( angle_to_beam_deg <= best_angle ) {
+ ils = stations[i];
+ best_angle = angle_to_beam_deg;
+ }
}
}
- return false;
+ return ils;
}
projects / flightgear.git / blobdiff