X-Git-Url: https://git.mxchange.org/?a=blobdiff_plain;f=src%2FNavaids%2Fnavlist.cxx;h=66d990d5cd987f0cda3aa54c03a4fe5c37595b13;hb=e171f0ecdbbdac03d35a2dd022b14a98989c3984;hp=c5234dea48eee130e94082ff1a2ab429edaaa258;hpb=3188b395c8cd7011b21c11d2ab054cb045a45671;p=flightgear.git diff --git a/src/Navaids/navlist.cxx b/src/Navaids/navlist.cxx index c5234dea4..66d990d5c 100644 --- a/src/Navaids/navlist.cxx +++ b/src/Navaids/navlist.cxx @@ -16,7 +16,7 @@ // // You should have received a copy of the GNU General Public License // along with this program; if not, write to the Free Software -// Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. +// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. // // $Id$ @@ -26,334 +26,208 @@ #endif #include -#include #include +#include #include "navlist.hxx" +using std::string; -// Constructor -FGNavList::FGNavList( void ) { -} +// FGNavList ------------------------------------------------------------------ -FGTACANList::FGTACANList( void ){ +FGNavList::FGNavList( void ) +{ } -// Destructor -FGNavList::~FGNavList( void ) { +FGNavList::~FGNavList( void ) +{ + nav_list_type navlist = navaids.begin()->second; + navaids.erase( navaids.begin(), navaids.end() ); } -FGTACANList::~FGTACANList( void ){ -} // load the navaids and build the map -bool FGNavList::init() { - - // FIXME: leaves all the individual navaid entries leaked +bool FGNavList::init() +{ + // No need to delete the original navaid structures + // since we're using an SGSharedPointer + nav_list_type navlist = navaids.begin()->second; navaids.erase( navaids.begin(), navaids.end() ); - navaids_by_tile.erase( navaids_by_tile.begin(), navaids_by_tile.end() ); - ident_navaids.erase( ident_navaids.begin(), ident_navaids.end() ); - return true; } -bool FGTACANList::init() { - - return true; -} - -// real add a marker beacon -static void real_add( nav_map_type &navmap, const int master_index, - FGNavRecord *n ) -{ - navmap[master_index].push_back( n ); -} - - -// front end for add a marker beacon -static void tile_add( nav_map_type &navmap, FGNavRecord *n ) { - double diff; - - double lon = n->get_lon(); - double lat = n->get_lat(); - - int lonidx = (int)lon; - diff = lon - (double)lonidx; - if ( (lon < 0.0) && (fabs(diff) > SG_EPSILON) ) { - lonidx -= 1; - } - double lonfrac = lon - (double)lonidx; - lonidx += 180; - - int latidx = (int)lat; - diff = lat - (double)latidx; - if ( (lat < 0.0) && (fabs(diff) > SG_EPSILON) ) { - latidx -= 1; - } - double latfrac = lat - (double)latidx; - latidx += 90; - - int master_index = lonidx * 1000 + latidx; - // cout << "lonidx = " << lonidx << " latidx = " << latidx << " "; - // cout << "Master index = " << master_index << endl; - - // add to the actual bucket - real_add( navmap, master_index, n ); - - // if we are close to the edge, add to adjacent buckets so we only - // have to search one bucket at run time - - // there are 8 cases since there are 8 adjacent tiles - - if ( lonfrac < 0.2 ) { - real_add( navmap, master_index - 1000, n ); - if ( latfrac < 0.2 ) { - real_add( navmap, master_index - 1000 - 1, n ); - } else if ( latfrac > 0.8 ) { - real_add( navmap, master_index - 1000 + 1, n ); - } - } else if ( lonfrac > 0.8 ) { - real_add( navmap, master_index + 1000, n ); - if ( latfrac < 0.2 ) { - real_add( navmap, master_index + 1000 - 1, n ); - } else if ( latfrac > 0.8 ) { - real_add( navmap, master_index + 1000 + 1, n ); - } - } else if ( latfrac < 0.2 ) { - real_add( navmap, master_index - 1, n ); - } else if ( latfrac > 0.8 ) { - real_add( navmap, master_index + 1, n ); - } -} - - - // add an entry to the lists -bool FGNavList::add( FGNavRecord *n ) { +bool FGNavList::add( FGNavRecord *n ) +{ navaids[n->get_freq()].push_back(n); - ident_navaids[n->get_ident()].push_back(n); - tile_add( navaids_by_tile, n ); return true; } -// add an entry to the lists -bool FGTACANList::add( FGTACANRecord *c ) { - ident_channels[c->get_channel()].push_back(c); - return true; -} - -FGNavRecord *FGNavList::findByFreq( double freq, double lon, double lat, double elev ) +FGNavRecord *FGNavList::findByFreq( double freq, const SGGeod& position) { - nav_list_type stations = navaids[(int)(freq*100.0 + 0.5)]; - Point3D aircraft = sgGeodToCart( Point3D(lon, lat, elev) ); + const nav_list_type& stations = navaids[(int)(freq*100.0 + 0.5)]; SG_LOG( SG_INSTR, SG_DEBUG, "findbyFreq " << freq << " size " << stations.size() ); - - return findNavFromList( aircraft, stations ); + return findNavFromList( position, stations ); } - -FGNavRecord *FGNavList::findByIdent( const char* ident, - const double lon, const double lat ) +class VORNDBFilter : public FGPositioned::Filter { - nav_list_type stations = ident_navaids[ident]; - Point3D aircraft = sgGeodToCart( Point3D(lon, lat, 0.0) ); - - return findNavFromList( aircraft, stations ); -} - +public: + virtual bool pass(FGPositioned* aPos) const + { + return (aPos->type() == FGPositioned::VOR) || (aPos->type() == FGPositioned::NDB); + } +}; // Given an Ident and optional freqency, return the first matching // station. -FGNavRecord *FGNavList::findByIdentAndFreq( const char* ident, const double freq ) +FGNavRecord *FGNavList::findByIdentAndFreq(const string& ident, const double freq ) { - nav_list_type stations = ident_navaids[ident]; - SG_LOG( SG_INSTR, SG_DEBUG, "findByIdent " << ident<< " size " << stations.size() ); - if ( freq > 0.0 ) { - // sometimes there can be duplicated idents. If a freq is - // specified, use it to refine the search. - int f = (int)(freq*100.0 + 0.5); - for ( unsigned int i = 0; i < stations.size(); ++i ) { - if ( f == stations[i]->get_freq() ) { - return stations[i]; - } - } - } else if (stations.size()) { - return stations[0]; + FGPositionedRef cur; + VORNDBFilter filter; + cur = FGPositioned::findNextWithPartialId(cur, ident, &filter); + + if (freq <= 0.0) { + return static_cast(cur.ptr()); // might be null + } + + int f = (int)(freq*100.0 + 0.5); + while (cur) { + FGNavRecord* nav = static_cast(cur.ptr()); + if (nav->get_freq() == f) { + return nav; } + + cur = FGPositioned::findNextWithPartialId(cur, ident, &filter); + } - return NULL; + return NULL; } +// LOC, ILS, GS, and DME antenna's could potentially be +// installed at the opposite end of the runway. So it's not +// enough to simply find the closest antenna with the right +// frequency. We need the closest antenna with the right +// frequency that is most oriented towards us. (We penalize +// stations that are facing away from us by adding 5000 meters +// which is further than matching stations would ever be +// placed from each other. (Do the expensive check only for +// directional atennas and only when there is a chance it is +// the closest station.) + +static bool penaltyForNav(FGNavRecord* aNav, const SGGeod &aGeod) +{ + switch (aNav->type()) { + case FGPositioned::ILS: + case FGPositioned::LOC: + case FGPositioned::GS: +// FIXME +// case FGPositioned::DME: we can't get the heading for a DME transmitter, oops + break; + default: + return false; + } + + double hdg_deg = 0.0; + if (aNav->type() == FGPositioned::GS) { + int tmp = (int)(aNav->get_multiuse() / 1000.0); + hdg_deg = aNav->get_multiuse() - (tmp * 1000); + } else { + hdg_deg = aNav->get_multiuse(); + } + + double az1, az2, s; + SGGeodesy::inverse(aGeod, aNav->geod(), az1, az2, s); + az1 = az1 - hdg_deg; + SG_NORMALIZE_RANGE(az1, -180.0, 180.0); + return fabs(az1) > 90.0; +} // Given a point and a list of stations, return the closest one to the // specified point. -FGNavRecord *FGNavList::findNavFromList( const Point3D &aircraft, +FGNavRecord *FGNavList::findNavFromList( const SGGeod &aircraft, const nav_list_type &stations ) { FGNavRecord *nav = NULL; - Point3D station; double d2; // in meters squared double min_dist = FG_NAV_MAX_RANGE*SG_NM_TO_METER*FG_NAV_MAX_RANGE*SG_NM_TO_METER; - + SGVec3d aircraftCart = SGVec3d::fromGeod(aircraft); + + nav_list_const_iterator it; + nav_list_const_iterator end = stations.end(); // find the closest station within a sensible range (FG_NAV_MAX_RANGE) - for ( unsigned int i = 0; i < stations.size(); ++i ) { - // cout << "testing " << current->get_ident() << endl; - station = Point3D( stations[i]->get_x(), - stations[i]->get_y(), - stations[i]->get_z() ); - - d2 = aircraft.distance3Dsquared( station ); - - // cout << " dist = " << sqrt(d) - // << " range = " << current->get_range() * SG_NM_TO_METER - // << endl; - - // LOC, ILS, GS, and DME antenna's could potentially be - // installed at the opposite end of the runway. So it's not - // enough to simply find the closest antenna with the right - // frequency. We need the closest antenna with the right - // frequency that is most oriented towards us. (We penalize - // stations that are facing away from us by adding 5000 meters - // which is further than matching stations would ever be - // placed from each other. (Do the expensive check only for - // directional atennas and only when there is a chance it is - // the closest station.) - if ( d2 < min_dist && - (stations[i]->get_type() == 4 || stations[i]->get_type() == 5 || - stations[i]->get_type() == 6 || stations[i]->get_type() == 12) ) + for ( it = stations.begin(); it != end; ++it ) { + FGNavRecord *station = *it; + // cout << "testing " << current->get_ident() << endl; + d2 = distSqr(station->cart(), aircraftCart); + if ( d2 < min_dist && penaltyForNav(station, aircraft)) { - double hdg_deg = 0.0; - if ( stations[i]->get_type() == 4 || stations[i]->get_type() == 5 ){ - hdg_deg = stations[i]->get_multiuse(); - } else if ( stations[i]->get_type() == 6 ) { - int tmp = (int)(stations[i]->get_multiuse() / 1000.0); - hdg_deg = stations[i]->get_multiuse() - (tmp * 1000); - } else if ( stations[i]->get_type() == 12 ) { - // oops, Robin's data format doesn't give us the - // needed information to compute a heading for a DME - // transmitter. FIXME Robin! - } - - double az1 = 0.0, az2 = 0.0, s = 0.0; - double elev_m = 0.0, lat_rad = 0.0, lon_rad = 0.0; - double xyz[3] = { aircraft.x(), aircraft.y(), aircraft.z() }; - sgCartToGeod( xyz, &lat_rad, &lon_rad, &elev_m ); - geo_inverse_wgs_84( elev_m, - lat_rad * SG_RADIANS_TO_DEGREES, - lon_rad * SG_RADIANS_TO_DEGREES, - stations[i]->get_lat(), stations[i]->get_lon(), - &az1, &az2, &s); - az1 = az1 - stations[i]->get_multiuse(); - if ( az1 > 180.0) az1 -= 360.0; - if ( az1 < -180.0) az1 += 360.0; - // penalize opposite facing stations by adding 5000 meters - // (squared) which is further than matching stations would - // ever be placed from each other. - if ( fabs(az1) > 90.0 ) { - double dist = sqrt(d2); - d2 = (dist + 5000) * (dist + 5000); - } + double dist = sqrt(d2); + d2 = (dist + 5000) * (dist + 5000); } - + if ( d2 < min_dist ) { min_dist = d2; - nav = stations[i]; + nav = station; } } return nav; } - -// returns the closest entry to the give lon/lat/elev -FGNavRecord *FGNavList::findClosest( double lon_rad, double lat_rad, - double elev_m ) +// Given a frequency, return the first matching station. +FGNavRecord *FGNavList::findStationByFreq( double freq ) { - FGNavRecord *result = NULL; - double diff; - - double lon_deg = lon_rad * SG_RADIANS_TO_DEGREES; - double lat_deg = lat_rad * SG_RADIANS_TO_DEGREES; - int lonidx = (int)lon_deg; - diff = lon_deg - (double)lonidx; - if ( (lon_deg < 0.0) && (fabs(diff) > SG_EPSILON) ) { - lonidx -= 1; - } - lonidx += 180; + const nav_list_type& stations = navaids[(int)(freq*100.0 + 0.5)]; - int latidx = (int)lat_deg; - diff = lat_deg - (double)latidx; - if ( (lat_deg < 0.0) && (fabs(diff) > SG_EPSILON) ) { - latidx -= 1; - } - latidx += 90; + SG_LOG( SG_INSTR, SG_DEBUG, "findStationByFreq " << freq << " size " << stations.size() ); - int master_index = lonidx * 1000 + latidx; - - nav_list_type navs = navaids_by_tile[ master_index ]; - // cout << "Master index = " << master_index << endl; - // cout << "beacon search length = " << beacons.size() << endl; - - nav_list_iterator current = navs.begin(); - nav_list_iterator last = navs.end(); - - Point3D aircraft = sgGeodToCart( Point3D(lon_rad, - lat_rad, - elev_m) ); - - double min_dist = 999999999.0; - - for ( ; current != last ; ++current ) { - // cout << " testing " << (*current)->get_ident() << endl; - Point3D station = Point3D( (*current)->get_x(), - (*current)->get_y(), - (*current)->get_z() ); - // cout << " aircraft = " << aircraft << " station = " << station - // << endl; - - double d = aircraft.distance3Dsquared( station ); // meters^2 - // cout << " distance = " << d << " (" - // << FG_ILS_DEFAULT_RANGE * SG_NM_TO_METER - // * FG_ILS_DEFAULT_RANGE * SG_NM_TO_METER - // << ")" << endl; - - // cout << " range = " << sqrt(d) << endl; - - if ( d < min_dist ) { - min_dist = d; - result = (*current); - } + if (!stations.empty()) { + return stations[0]; } + return NULL; +} + - // cout << "lon = " << lon << " lat = " << lat - // << " closest beacon = " << sqrt( min_dist ) << endl; - return result; +// FGTACANList ---------------------------------------------------------------- + +FGTACANList::FGTACANList( void ) +{ } -// Given a TACAN Channel return the first matching frequency -FGTACANRecord *FGTACANList::findByChannel( string channel ) + +FGTACANList::~FGTACANList( void ) { - tacan_list_type stations = ident_channels[channel]; - SG_LOG( SG_INSTR, SG_DEBUG, "findByChannel " << channel<< " size " << stations.size() ); - - if (stations.size()) { - return stations[0]; - } - return NULL; } -// Given a frequency, return the first matching station. -FGNavRecord *FGNavList::findStationByFreq( double freq ) + +bool FGTACANList::init() { - nav_list_type stations = navaids[(int)(freq*100.0 + 0.5)]; - - SG_LOG( SG_INSTR, SG_DEBUG, "findStationByFreq " << freq << " size " << stations.size() ); - - if (stations.size()) { + return true; +} + + +// add an entry to the lists +bool FGTACANList::add( FGTACANRecord *c ) +{ + ident_channels[c->get_channel()].push_back(c); + return true; +} + + +// Given a TACAN Channel return the first matching frequency +FGTACANRecord *FGTACANList::findByChannel( const string& channel ) +{ + const tacan_list_type& stations = ident_channels[channel]; + SG_LOG( SG_INSTR, SG_DEBUG, "findByChannel " << channel<< " size " << stations.size() ); + + if (!stations.empty()) { return stations[0]; - } + } return NULL; } + +