X-Git-Url: https://git.mxchange.org/?a=blobdiff_plain;f=src%2FNavaids%2Fnavlist.cxx;h=822391e04d79d38cd928566f07c4c023decce286;hb=b30408b862ae0a300ff32ef90b20cdde9efdd499;hp=75f15ee90a8c5c116b23b21b78e5cfbdd0c4d348;hpb=2e08c972048c9d0ee321d0ad960dadd5c21a573f;p=flightgear.git diff --git a/src/Navaids/navlist.cxx b/src/Navaids/navlist.cxx index 75f15ee90..822391e04 100644 --- a/src/Navaids/navlist.cxx +++ b/src/Navaids/navlist.cxx @@ -1,8 +1,8 @@ -// navaids.cxx -- navaids management class +// navlist.cxx -- navaids management class // // 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 @@ -16,127 +16,319 @@ // // 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. // // $Id$ +#ifdef HAVE_CONFIG_H +# include +#endif + +#include +#include +#include + #include -#include -#include +#include +#include #include "navlist.hxx" +#include +#include +#include -FGNavList *current_navlist; +using std::string; +namespace { // anonymous + +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; + +}; -// Constructor -FGNavList::FGNavList( void ) { +// 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 ------------------------------------------------------------------ -// Destructor -FGNavList::~FGNavList( void ) { + +//------------------------------------------------------------------------------ +FGNavList::TypeFilter::TypeFilter(const FGPositioned::Type type) +{ + if (type == FGPositioned::INVALID) { + _mintype = FGPositioned::NDB; + _maxtype = FGPositioned::GS; + } else { + _mintype = _maxtype = type; + } } +//------------------------------------------------------------------------------ +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; -// load the navaids and build the map -bool FGNavList::init( FGPath path ) { - FGNav n; + _mintype = _maxtype = t; - navaids.erase( navaids.begin(), navaids.end() ); + return true; +} - fg_gzifstream in( path.str() ); - if ( !in.is_open() ) { - FG_LOG( FG_GENERAL, FG_ALERT, "Cannot open file: " << path.str() ); - exit(-1); +/** + * 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); + } +}; - // read in each line of the file +FGNavList::TypeFilter* FGNavList::locFilter() +{ + static TypeFilter tf(FGPositioned::ILS, FGPositioned::LOC); + return &tf; +} - in >> skipeol; - in >> skipcomment; +FGNavList::TypeFilter* FGNavList::ndbFilter() +{ + static TypeFilter tf(FGPositioned::NDB); + return &tf; +} + +FGNavList::TypeFilter* FGNavList::navFilter() +{ + static TypeFilter tf(FGPositioned::VOR, FGPositioned::LOC); + return &tf; +} + +FGNavList::TypeFilter* FGNavList::tacanFilter() +{ + static TacanFilter tf; + return &tf; +} -#ifdef __MWERKS__ +FGNavList::TypeFilter* FGNavList::carrierFilter() +{ + static TypeFilter tf(FGPositioned::MOBILE_TACAN); + return &tf; +} - char c = 0; - while ( in.get(c) && c != '\0' && n.get_type() != '[' ) { - in.putback(c); - in >> n; - if ( n.get_type() != '[' ) { - navaids[n.get_freq()].push_back(n); - } - in >> skipcomment; +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 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; + } -#else - - double min = 100000; - double max = 0; - - while ( ! in.eof() && n.get_type() != '[' ) { - in >> n; - /* 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 ( n.get_type() != '[' ) { - navaids[n.get_freq()].push_back(n); - } - in >> skipcomment; - - if ( n.get_type() != 'N' ) { - if ( n.get_freq() < min ) { - min = n.get_freq(); - } - if ( n.get_freq() > max ) { - max = n.get_freq(); - } - } + BOOST_FOREACH(PositionedID id, stations) { + FGNavRecordRef station = FGPositioned::loadById(id); + if (filter->pass(station)) { + return station; } + } - // cout << "min freq = " << min << endl; - // cout << "max freq = " << max << endl; + return NULL; +} -#endif +nav_list_type FGNavList::findAllByFreq( double freq, const SGGeod& position, + TypeFilter* filter) +{ + 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 true; + 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; +} -// query the database for the specified frequency, lon and lat are in -// degrees, elev is in meters -bool FGNavList::query( double lon, double lat, double elev, double freq, - FGNav *n ) +// 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 = navaids[(int)(freq*100.0 + 0.5)]; + nav_list_type reply = findByIdentAndFreq( ident, freq, filter ); + NavRecordDistanceSortPredicate sortPredicate( position ); + std::sort( reply.begin(), reply.end(), sortPredicate ); + + return reply; +} - nav_list_iterator current = stations.begin(); - nav_list_iterator last = stations.end(); +// FGTACANList ---------------------------------------------------------------- - // double az1, az2, s; - Point3D aircraft = fgGeodToCart( Point3D(lon, lat, elev) ); - Point3D station; - double d; - for ( ; current != last ; ++current ) { - // cout << "testing " << current->get_ident() << endl; - station = Point3D(current->get_x(), current->get_y(), current->get_z()); +FGTACANList::FGTACANList( void ) +{ +} - d = aircraft.distance3Dsquared( station ); - // cout << " dist = " << sqrt(d) - // << " range = " << current->get_range() * NM_TO_METER << endl; - if ( d < (current->get_range() * NM_TO_METER - * current->get_range() * NM_TO_METER * 5.0) ) { - // cout << "matched = " << current->get_ident() << endl; - *n = *current; - return true; - } - } +FGTACANList::~FGTACANList( void ) +{ +} - return false; + +bool FGTACANList::init() +{ + 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_NAVAID, SG_DEBUG, "findByChannel " << channel<< " size " << stations.size() ); + + if (!stations.empty()) { + return stations[0]; + } + return NULL; +} + +