X-Git-Url: https://git.mxchange.org/?a=blobdiff_plain;f=src%2FNavaids%2Fnavlist.cxx;h=66d990d5cd987f0cda3aa54c03a4fe5c37595b13;hb=e171f0ecdbbdac03d35a2dd022b14a98989c3984;hp=db55bebbdaaa6c016dfe7e3cfd9c489e0c955867;hpb=2c20ef1c7f7b5dfef06db045b3c135b3d39544fd;p=flightgear.git diff --git a/src/Navaids/navlist.cxx b/src/Navaids/navlist.cxx index db55bebbd..66d990d5c 100644 --- a/src/Navaids/navlist.cxx +++ b/src/Navaids/navlist.cxx @@ -26,24 +26,12 @@ #endif #include -#include #include +#include #include "navlist.hxx" - -// Return true if the nav record matches the type -static bool isTypeMatch(const FGNavRecord* n, fg_nav_types type) { - switch(type) { - case FG_NAV_ANY: return(true); - case FG_NAV_VOR: return(n->get_type() == 3); - case FG_NAV_NDB: return(n->get_type() == 2); - case FG_NAV_ILS: return(n->get_type() == 4); // Note - very simplified, only matches loc as part of full ILS. - default: return false; - } -} - - +using std::string; // FGNavList ------------------------------------------------------------------ @@ -54,343 +42,141 @@ FGNavList::FGNavList( void ) FGNavList::~FGNavList( void ) { + nav_list_type navlist = navaids.begin()->second; + navaids.erase( navaids.begin(), navaids.end() ); } // load the navaids and build the map bool FGNavList::init() { - // FIXME: leaves all the individual navaid entries leaked + // 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; } - -// 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 ) { navaids[n->get_freq()].push_back(n); - ident_navaids[n->get_ident()].push_back(n); - tile_add( navaids_by_tile, n ); return true; } - -FGNavRecord *FGNavList::findByFreq( double freq, double lon, double lat, double elev ) +FGNavRecord *FGNavList::findByFreq( double freq, const SGGeod& position) { const nav_list_type& stations = navaids[(int)(freq*100.0 + 0.5)]; - - SGGeod geod = SGGeod::fromRadM(lon, lat, elev); - SGVec3d aircraft = SGVec3d::fromGeod(geod); 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 { - const nav_list_type& stations = ident_navaids[ident]; - SGGeod geod = SGGeod::fromRad(lon, lat); - SGVec3d aircraft = SGVec3d::fromGeod(geod); - return findNavFromList( aircraft, stations ); -} - - -nav_list_type FGNavList::findFirstByIdent( const string& ident, fg_nav_types type, bool exact) -{ - nav_list_type n2; - n2.clear(); - - int iType; - if(type == FG_NAV_VOR) iType = 3; - else if(type == FG_NAV_NDB) iType = 2; - else return(n2); - - nav_ident_map_iterator it; - if(exact) { - it = ident_navaids.find(ident); - } else { - bool typeMatch = false; - int safety_count = 0; - it = ident_navaids.lower_bound(ident); - while(!typeMatch) { - nav_list_type n0 = it->second; - // local copy, so we should be able to do anything with n0. - // Remove the types that don't match request. - for(nav_list_iterator it0 = n0.begin(); it0 != n0.end();) { - FGNavRecord* nv = *it0; - if(nv->get_type() == iType) { - typeMatch = true; - ++it0; - } else { - it0 = n0.erase(it0); - } - } - if(typeMatch) { - return(n0); - } - if(it == ident_navaids.begin()) { - // We didn't find a match before reaching the beginning of the map - n0.clear(); - return(n0); - } - safety_count++; - if(safety_count == 1000000) { - SG_LOG(SG_INSTR, SG_ALERT, - "safety_count triggered exit from while loop in findFirstByIdent!"); - break; - } - ++it; - if(it == ident_navaids.end()) { - n0.clear(); - return(n0); - } - } - } - if(it == ident_navaids.end()) { - n2.clear(); - return(n2); - } else { - nav_list_type n1 = it->second; - n2.clear(); - for(nav_list_iterator it2 = n1.begin(); it2 != n1.end(); ++it2) { - FGNavRecord* nv = *it2; - if(nv->get_type() == iType) n2.push_back(nv); - } - return(n2); - } -} - +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 ) -{ - 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]; +FGNavRecord *FGNavList::findByIdentAndFreq(const string& ident, const double freq ) +{ + 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; } - - return NULL; + + cur = FGPositioned::findNextWithPartialId(cur, ident, &filter); + } + + 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 SGVec3d &aircraft, +FGNavRecord *FGNavList::findNavFromList( const SGGeod &aircraft, const nav_list_type &stations ) { FGNavRecord *nav = NULL; 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 ) { + for ( it = stations.begin(); it != end; ++it ) { + FGNavRecord *station = *it; // cout << "testing " << current->get_ident() << endl; - d2 = distSqr(stations[i]->get_cart(), aircraft); - - // 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 || - stations[i]->get_type() == 13) ) + 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 || - stations[i]->get_type() == 13 ) { - // 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; - SGGeod geod = SGGeod::fromCart(aircraft); - geo_inverse_wgs_84( geod, stations[i]->get_pos(), - &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, fg_nav_types type) -{ - 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; - - int latidx = (int)lat_deg; - diff = lat_deg - (double)latidx; - if ( (lat_deg < 0.0) && (fabs(diff) > SG_EPSILON) ) { - latidx -= 1; - } - latidx += 90; - - int master_index = lonidx * 1000 + latidx; - - const nav_list_type& navs = navaids_by_tile[ master_index ]; - // cout << "Master index = " << master_index << endl; - // cout << "beacon search length = " << beacons.size() << endl; - - nav_list_const_iterator current = navs.begin(); - nav_list_const_iterator last = navs.end(); - - SGGeod geod = SGGeod::fromRadM(lon_rad, lat_rad, elev_m); - SGVec3d aircraft = SGVec3d::fromGeod(geod); - - double min_dist = 999999999.0; - - for ( ; current != last ; ++current ) { - if(isTypeMatch(*current, type)) { - // cout << " testing " << (*current)->get_ident() << endl; - - double d = distSqr((*current)->get_cart(), aircraft); - // 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); - } - } - } - - // cout << "lon = " << lon << " lat = " << lat - // << " closest beacon = " << sqrt( min_dist ) << endl; - - return result; -} - // Given a frequency, return the first matching station. FGNavRecord *FGNavList::findStationByFreq( double freq ) { @@ -398,7 +184,7 @@ FGNavRecord *FGNavList::findStationByFreq( double freq ) SG_LOG( SG_INSTR, SG_DEBUG, "findStationByFreq " << freq << " size " << stations.size() ); - if (stations.size()) { + if (!stations.empty()) { return stations[0]; } return NULL; @@ -438,7 +224,7 @@ 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.size()) { + if (!stations.empty()) { return stations[0]; } return NULL;