X-Git-Url: https://git.mxchange.org/?a=blobdiff_plain;f=src%2FNavaids%2Fnavlist.cxx;h=9b0c911dee50c44c274532495c78113a9252fb5d;hb=9c467af6bf2f04ddaae2d7937ce6d4b547ab099b;hp=8b8aabd10abc70a9c3c1e991d1ec69c1c11a14f9;hpb=258cd292c6638459e7ea1eaa50f1ddf7ac3029b5;p=flightgear.git diff --git a/src/Navaids/navlist.cxx b/src/Navaids/navlist.cxx index 8b8aabd10..9b0c911de 100644 --- a/src/Navaids/navlist.cxx +++ b/src/Navaids/navlist.cxx @@ -2,7 +2,7 @@ // // Written by Curtis Olson, started April 2000. // -// Copyright (C) 2000 Curtis L. Olson - curt@flightgear.org +// Copyright (C) 2000 Curtis L. Olson - http://www.flightgear.org/~curt // // This program is free software; you can redistribute it and/or // modify it under the terms of the GNU General Public License as @@ -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. // // $Id$ @@ -25,251 +25,310 @@ # include #endif +#include +#include +#include + #include -#include #include +#include #include "navlist.hxx" +#include +#include +#include -// Constructor -FGNavList::FGNavList( void ) { -} +using std::string; +namespace { // anonymous -// Destructor -FGNavList::~FGNavList( void ) { +class NavRecordDistanceSortPredicate +{ +public: + NavRecordDistanceSortPredicate( const SGGeod & position ) : + _position(SGVec3d::fromGeod(position)) {} + + bool operator()( const nav_rec_ptr & n1, const nav_rec_ptr & n2 ) + { + if( n1 == NULL || n2 == NULL ) return false; + return distSqr(n1->cart(), _position) < distSqr(n2->cart(), _position); + } +private: + SGVec3d _position; + +}; + +// discount navids if they conflict with another on the same frequency +// this only applies to navids associated with opposite ends of a runway, +// with matching frequencies. +bool navidUsable(FGNavRecord* aNav, const SGGeod &aircraft) +{ + FGRunway* r(aNav->runway()); + if (!r || !r->reciprocalRunway()) { + return true; + } + + // check if the runway frequency is paired + FGNavRecord* locA = r->ILS(); + FGNavRecord* locB = r->reciprocalRunway()->ILS(); + + if (!locA || !locB || (locA->get_freq() != locB->get_freq())) { + return true; // not paired, ok + } + + // okay, both ends have an ILS, and they're paired. We need to select based on + // aircraft position. What we're going to use is *runway* (not navid) position, + // ie whichever runway end we are closer too. This makes back-course / missed + // approach behaviour incorrect, but that's the price we accept. + double crs = SGGeodesy::courseDeg(aircraft, r->geod()); + double hdgDiff = crs - r->headingDeg(); + SG_NORMALIZE_RANGE(hdgDiff, -180.0, 180.0); + return (fabs(hdgDiff) < 90.0); } + +} // of anonymous namespace +// FGNavList ------------------------------------------------------------------ -// load the navaids and build the map -bool FGNavList::init() { - // FIXME: leaves all the individual navaid entries leaked - 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() ); +//------------------------------------------------------------------------------ +FGNavList::TypeFilter::TypeFilter(const FGPositioned::Type type) +{ + if (type == FGPositioned::INVALID) { + _mintype = FGPositioned::NDB; + _maxtype = FGPositioned::GS; + } else { + _mintype = _maxtype = type; + } +} - return true; +//------------------------------------------------------------------------------ +FGNavList::TypeFilter::TypeFilter( const FGPositioned::Type minType, + const FGPositioned::Type maxType ): + _mintype(minType), + _maxtype(maxType) +{ } +//------------------------------------------------------------------------------ +bool FGNavList::TypeFilter::fromTypeString(const std::string& type) +{ + FGPositioned::Type t; + if( type == "any" ) t = FGPositioned::INVALID; + else if( type == "fix" ) t = FGPositioned::FIX; + else if( type == "vor" ) t = FGPositioned::VOR; + else if( type == "ndb" ) t = FGPositioned::NDB; + else if( type == "ils" ) t = FGPositioned::ILS; + else if( type == "dme" ) t = FGPositioned::DME; + else if( type == "tacan") t = FGPositioned::TACAN; + else return false; + + _mintype = _maxtype = t; + + return true; +} -// real add a marker beacon -static void real_add( nav_map_type &navmap, const int master_index, - FGNavRecord *n ) +/** + * Filter returning Tacan stations. Checks for both pure TACAN stations + * but also co-located VORTACs. This is done by searching for DMEs whose + * name indicates they are a TACAN or VORTAC; not a great solution. + */ +class TacanFilter : public FGNavList::TypeFilter +{ +public: + TacanFilter() : + TypeFilter(FGPositioned::DME, FGPositioned::TACAN) + { + } + + virtual bool pass(FGPositioned* pos) const + { + if (pos->type() == FGPositioned::TACAN) { + return true; + } + + assert(pos->type() == FGPositioned::DME); + string::size_type loc1 = pos->name().find( "TACAN" ); + string::size_type loc2 = pos->name().find( "VORTAC" ); + return (loc1 != string::npos) || (loc2 != string::npos); + } +}; + +FGNavList::TypeFilter* FGNavList::locFilter() { - navmap[master_index].push_back( n ); + static TypeFilter tf(FGPositioned::ILS, FGPositioned::LOC); + return &tf; } +FGNavList::TypeFilter* FGNavList::ndbFilter() +{ + static TypeFilter tf(FGPositioned::NDB); + return &tf; +} -// front end for add a marker beacon -static void tile_add( nav_map_type &navmap, FGNavRecord *n ) { - double diff; +FGNavList::TypeFilter* FGNavList::navFilter() +{ + static TypeFilter tf(FGPositioned::VOR, FGPositioned::LOC); + return &tf; +} - double lon = n->get_lon(); - double lat = n->get_lat(); +FGNavList::TypeFilter* FGNavList::tacanFilter() +{ + static TacanFilter tf; + return &tf; +} - 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; +FGNavList::TypeFilter* FGNavList::mobileTacanFilter() +{ + static TypeFilter tf(FGPositioned::MOBILE_TACAN); + return &tf; +} - int latidx = (int)lat; - diff = lat - (double)latidx; - if ( (lat < 0.0) && (fabs(diff) > SG_EPSILON) ) { - latidx -= 1; +FGNavRecordRef FGNavList::findByFreq( double freq, + const SGGeod& position, + TypeFilter* filter ) +{ + flightgear::NavDataCache* cache = flightgear::NavDataCache::instance(); + int freqKhz = static_cast(freq * 100 + 0.5); + PositionedIDVec stations(cache->findNavaidsByFreq(freqKhz, position, filter)); + if (stations.empty()) { + return NULL; + } + +// now walk the (sorted) results list to find a usable, in-range navaid + SGVec3d acCart(SGVec3d::fromGeod(position)); + double min_dist + = FG_NAV_MAX_RANGE*SG_NM_TO_METER*FG_NAV_MAX_RANGE*SG_NM_TO_METER; + + BOOST_FOREACH(PositionedID id, stations) { + FGNavRecordRef station = FGPositioned::loadById(id); + if (!filter->pass(station)) { + continue; } - 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 ); + + double d2 = distSqr(station->cart(), acCart); + if (d2 > min_dist) { + // since results are sorted by proximity, as soon as we pass the + // distance cutoff we're done - fall out and return NULL + break; } + + if (navidUsable(station, position)) { + return station; + } + } + +// fell out of the loop, no usable match + return NULL; } +FGNavRecordRef FGNavList::findByFreq(double freq, TypeFilter* filter) +{ + flightgear::NavDataCache* cache = flightgear::NavDataCache::instance(); + int freqKhz = static_cast(freq * 100 + 0.5); + PositionedIDVec stations(cache->findNavaidsByFreq(freqKhz, filter)); + if (stations.empty()) { + return NULL; + } + BOOST_FOREACH(PositionedID id, stations) { + FGNavRecordRef station = FGPositioned::loadById(id); + if (filter->pass(station)) { + return station; + } + } -// 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; + return NULL; } - -// 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. -FGNavRecord *FGNavList::findByFreq( double freq, double lon, double lat, double elev ) +nav_list_type FGNavList::findAllByFreq( double freq, const SGGeod& position, + TypeFilter* filter) { - nav_list_type stations = navaids[(int)(freq*100.0 + 0.5)]; - Point3D aircraft = sgGeodToCart( Point3D(lon, lat, elev) ); + nav_list_type stations; + + flightgear::NavDataCache* cache = flightgear::NavDataCache::instance(); + int freqKhz = static_cast(freq * 1000 + 0.5); + PositionedIDVec ids(cache->findNavaidsByFreq(freqKhz, position, filter)); + + BOOST_FOREACH(PositionedID id, ids) { + FGNavRecordRef station = FGPositioned::loadById(id); + if (!filter->pass(station)) { + continue; + } - return findNavFromList( aircraft, stations ); + stations.push_back(station); + } + + return stations; } +nav_list_type FGNavList::findByIdentAndFreq(const string& ident, const double freq, + TypeFilter* filter) +{ + nav_list_type reply; + int f = (int)(freq*100.0 + 0.5); + + FGPositionedList stations = FGPositioned::findAllWithIdent(ident, filter); + BOOST_FOREACH(FGPositionedRef ref, stations) { + FGNavRecord* nav = static_cast(ref.ptr()); + if ( f <= 0.0 || nav->get_freq() == f) { + reply.push_back( nav ); + } + } + + return reply; +} -FGNavRecord *FGNavList::findByIdent( const char* ident, - const double lon, const double lat ) +// Given an Ident and optional frequency and type , +// return a list of matching stations sorted by distance to the given position +nav_list_type FGNavList::findByIdentAndFreq( const SGGeod & position, + const std::string& ident, const double freq, + TypeFilter* filter) { - nav_list_type stations = ident_navaids[ident]; - Point3D aircraft = sgGeodToCart( Point3D(lon, lat, 0.0) ); + nav_list_type reply = findByIdentAndFreq( ident, freq, filter ); + NavRecordDistanceSortPredicate sortPredicate( position ); + std::sort( reply.begin(), reply.end(), sortPredicate ); - return findNavFromList( aircraft, stations ); + return reply; } +// FGTACANList ---------------------------------------------------------------- -// Given an Ident and optional freqency, return the first matching -// station. -FGNavRecord *FGNavList::findByIdentAndFreq( const char* ident, const double freq ) +FGTACANList::FGTACANList( void ) { - nav_list_type stations = ident_navaids[ident]; - - 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 { - return stations[0]; - } - - return NULL; } -// Given a point and a list of stations, return the closest one to the -// specified point. -FGNavRecord *FGNavList::findNavFromList( const Point3D &aircraft, - const nav_list_type &stations ) +FGTACANList::~FGTACANList( void ) { - FGNavRecord *nav = NULL; - Point3D station; - double dist; - double min_dist = FG_NAV_MAX_RANGE * SG_NM_TO_METER; - - // 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() ); - - dist = aircraft.distance3D( station ); - - // cout << " dist = " << sqrt(d) - // << " range = " << current->get_range() * SG_NM_TO_METER - // << endl; - - if ( dist < min_dist ) { - min_dist = dist; - nav = stations[i]; - } - } +} - return nav; + +bool FGTACANList::init() +{ + return true; } -// returns the closest entry to the give lon/lat/elev -FGNavRecord *FGNavList::findClosest( double lon_rad, double lat_rad, - double elev_m ) +// add an entry to the lists +bool FGTACANList::add( FGTACANRecord *c ) { - 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; + ident_channels[c->get_channel()].push_back(c); + return true; +} - 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; - - 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); - } +// 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_NAVAID, SG_DEBUG, "findByChannel " << channel<< " size " << stations.size() ); + + if (!stations.empty()) { + return stations[0]; } + return NULL; +} - // cout << "lon = " << lon << " lat = " << lat - // << " closest beacon = " << sqrt( min_dist ) << endl; - return result; -}