X-Git-Url: https://git.mxchange.org/?a=blobdiff_plain;f=src%2FNavaids%2Fnavlist.cxx;h=822391e04d79d38cd928566f07c4c023decce286;hb=b30408b862ae0a300ff32ef90b20cdde9efdd499;hp=f490521253300af170d352f8635a13845d590753;hpb=8a756eee5404eefbe88d0899439366b50e491c2a;p=flightgear.git diff --git a/src/Navaids/navlist.cxx b/src/Navaids/navlist.cxx index f49052125..822391e04 100644 --- a/src/Navaids/navlist.cxx +++ b/src/Navaids/navlist.cxx @@ -25,175 +25,273 @@ # include #endif +#include +#include +#include + #include #include #include #include "navlist.hxx" +#include +#include +#include + using std::string; -// FGNavList ------------------------------------------------------------------ +namespace { // anonymous -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; + +}; -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) { - nav_list_type navlist = navaids.begin()->second; - navaids.erase( navaids.begin(), navaids.end() ); + 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() +//------------------------------------------------------------------------------ +FGNavList::TypeFilter::TypeFilter(const FGPositioned::Type type) { - // 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() ); - return true; + if (type == FGPositioned::INVALID) { + _mintype = FGPositioned::NDB; + _maxtype = FGPositioned::GS; + } else { + _mintype = _maxtype = type; + } } -// add an entry to the lists -bool FGNavList::add( FGNavRecord *n ) +//------------------------------------------------------------------------------ +FGNavList::TypeFilter::TypeFilter( const FGPositioned::Type minType, + const FGPositioned::Type maxType ): + _mintype(minType), + _maxtype(maxType) { - navaids[n->get_freq()].push_back(n); - return true; } -FGNavRecord *FGNavList::findByFreq( double freq, const SGGeod& position) +//------------------------------------------------------------------------------ +bool FGNavList::TypeFilter::fromTypeString(const std::string& type) { - 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( position, stations ); + 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; } -class VORNDBFilter : public FGPositioned::Filter +/** + * 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: - virtual FGPositioned::Type minType() const { - return FGPositioned::VOR; + TacanFilter() : + TypeFilter(FGPositioned::DME, FGPositioned::TACAN) + { } - - virtual FGPositioned::Type maxType() const { - return FGPositioned::NDB; + + 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); } }; -// Given an Ident and optional freqency, return the first matching -// station. -FGNavRecord *FGNavList::findByIdentAndFreq(const string& ident, const double freq ) +FGNavList::TypeFilter* FGNavList::locFilter() { - FGPositionedRef cur; - VORNDBFilter filter; - cur = FGPositioned::findNextWithPartialId(cur, ident, &filter); - - if (freq <= 0.0) { - return static_cast(cur.ptr()); // might be null + static TypeFilter tf(FGPositioned::ILS, FGPositioned::LOC); + return &tf; +} + +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; +} + +FGNavList::TypeFilter* FGNavList::carrierFilter() +{ + static TypeFilter tf(FGPositioned::MOBILE_TACAN); + return &tf; +} + +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; } - int f = (int)(freq*100.0 + 0.5); - while (cur) { - FGNavRecord* nav = static_cast(cur.ptr()); - if (nav->get_freq() == f) { - return nav; +// 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; } - cur = FGPositioned::findNextWithPartialId(cur, ident, &filter); + if (navidUsable(station, position)) { + return station; + } } - + +// fell out of the loop, no usable match 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(); +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; } - - 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 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 ( 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 dist = sqrt(d2); - d2 = (dist + 5000) * (dist + 5000); - } - - if ( d2 < min_dist ) { - min_dist = d2; - nav = station; - } + + BOOST_FOREACH(PositionedID id, stations) { + FGNavRecordRef station = FGPositioned::loadById(id); + if (filter->pass(station)) { + return station; } + } - return nav; + return NULL; } -// Given a frequency, return the first matching station. -FGNavRecord *FGNavList::findStationByFreq( double freq ) +nav_list_type FGNavList::findAllByFreq( double freq, const SGGeod& position, + TypeFilter* filter) { - const nav_list_type& stations = navaids[(int)(freq*100.0 + 0.5)]; + 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; + } - SG_LOG( SG_INSTR, SG_DEBUG, "findStationByFreq " << freq << " size " << stations.size() ); + stations.push_back(station); + } + + return stations; +} - if (!stations.empty()) { - return stations[0]; +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 NULL; + } + + return reply; } +// 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 reply = findByIdentAndFreq( ident, freq, filter ); + NavRecordDistanceSortPredicate sortPredicate( position ); + std::sort( reply.begin(), reply.end(), sortPredicate ); + return reply; +} // FGTACANList ---------------------------------------------------------------- @@ -225,7 +323,7 @@ bool FGTACANList::add( FGTACANRecord *c ) 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() ); + SG_LOG( SG_NAVAID, SG_DEBUG, "findByChannel " << channel<< " size " << stations.size() ); if (!stations.empty()) { return stations[0];