# include <config.h>
#endif
+#include <cassert>
#include <boost/foreach.hpp>
#include <algorithm>
#include "navlist.hxx"
#include <Airports/runways.hxx>
+#include <Navaids/NavDataCache.hxx>
using std::string;
};
+// 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 ------------------------------------------------------------------
FGNavList::TypeFilter::TypeFilter(const FGPositioned::Type type)
{
if (type == FGPositioned::INVALID) {
- _mintype = FGPositioned::VOR;
+ _mintype = FGPositioned::NDB;
_maxtype = FGPositioned::GS;
} else {
_mintype = _maxtype = type;
}
-FGNavList::FGNavList( void )
+FGNavList::TypeFilter::TypeFilter(const FGPositioned::Type minType,
+ const FGPositioned::Type maxType) :
+ _mintype(minType),
+ _maxtype(maxType)
{
}
+/**
+ * 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::~FGNavList( void )
+FGNavList::TypeFilter* FGNavList::locFilter()
{
- nav_list_type navlist = navaids.begin()->second;
- navaids.erase( navaids.begin(), navaids.end() );
+ static TypeFilter tf(FGPositioned::ILS, FGPositioned::LOC);
+ return &tf;
}
-
-// load the navaids and build the map
-bool FGNavList::init()
+FGNavList::TypeFilter* FGNavList::ndbFilter()
{
- // 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;
+ static TypeFilter tf(FGPositioned::NDB);
+ return &tf;
}
-// add an entry to the lists
-bool FGNavList::add( FGNavRecord *n )
+FGNavList::TypeFilter* FGNavList::navFilter()
{
- navaids[n->get_freq()].push_back(n);
- return true;
+ static TypeFilter tf(FGPositioned::VOR, FGPositioned::LOC);
+ return &tf;
}
-FGNavRecord *FGNavList::findByFreq( double freq, const SGGeod& position)
+FGNavList::TypeFilter* FGNavList::tacanFilter()
{
- 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 );
+ static TacanFilter tf;
+ return &tf;
}
-nav_list_type FGNavList::findAllByFreq( double freq, const SGGeod& position, const FGPositioned::Type type)
+FGNavList::TypeFilter* FGNavList::carrierFilter()
{
- nav_list_type stations;
- TypeFilter filter(type);
-
- BOOST_FOREACH(nav_rec_ptr nav, navaids[(int)(freq*100.0 + 0.5)]) {
- if (filter.pass(nav.ptr())) {
- stations.push_back(nav);
- }
- }
-
- NavRecordDistanceSortPredicate sortPredicate( position );
- std::sort( stations.begin(), stations.end(), sortPredicate );
- return stations;
+ static TypeFilter tf(FGPositioned::MOBILE_TACAN);
+ return &tf;
}
-
-// Given an Ident and optional freqency, return the first matching
-// station.
-const nav_list_type FGNavList::findByIdentAndFreq(const string& ident, const double freq, const FGPositioned::Type type )
+FGNavRecord *FGNavList::findByFreq( double freq, const SGGeod& position,
+ TypeFilter* filter)
{
- FGPositionedRef cur;
- TypeFilter filter(type);
- nav_list_type reply;
-
- cur = FGPositioned::findNextWithPartialId(cur, ident, &filter);
+ flightgear::NavDataCache* cache = flightgear::NavDataCache::instance();
+ int freqKhz = static_cast<int>(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<FGNavRecord*>(cur.ptr());
- if ( f <= 0.0 || nav->get_freq() == f) {
- reply.push_back( 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) {
+ FGNavRecord* station = (FGNavRecord*) cache->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;
+ }
}
-
- return reply;
+
+// fell out of the loop, no usable match
+ return NULL;
}
-// Given an Ident and optional freqency and type ,
-// return a list of matching stations sorted by distance to the given position
-const nav_list_type FGNavList::findByIdentAndFreq( const SGGeod & position,
- const std::string& ident, const double freq, const FGPositioned::Type type )
+FGNavRecord *FGNavList::findByFreq( double freq, TypeFilter* filter)
{
- nav_list_type reply = findByIdentAndFreq( ident, freq, type );
- NavRecordDistanceSortPredicate sortPredicate( position );
- std::sort( reply.begin(), reply.end(), sortPredicate );
+ flightgear::NavDataCache* cache = flightgear::NavDataCache::instance();
+ int freqKhz = static_cast<int>(freq * 100 + 0.5);
+ PositionedIDVec stations(cache->findNavaidsByFreq(freqKhz, filter));
+ if (stations.empty()) {
+ return NULL;
+ }
- return reply;
+ BOOST_FOREACH(PositionedID id, stations) {
+ FGNavRecord* station = (FGNavRecord*) cache->loadById(id);
+ if (filter->pass(station)) {
+ return station;
+ }
+ }
+
+ return NULL;
}
-// 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.
-static bool navidUsable(FGNavRecord* aNav, const SGGeod &aircraft)
+nav_list_type FGNavList::findAllByFreq( double freq, const SGGeod& position,
+ TypeFilter* filter)
{
- FGRunway* r(aNav->runway());
- if (!r || !r->reciprocalRunway()) {
- return true;
- }
+ nav_list_type stations;
-// check if the runway frequency is paired
- FGNavRecord* locA = r->ILS();
- FGNavRecord* locB = r->reciprocalRunway()->ILS();
+ flightgear::NavDataCache* cache = flightgear::NavDataCache::instance();
+ int freqKhz = static_cast<int>(freq * 1000 + 0.5);
+ PositionedIDVec ids(cache->findNavaidsByFreq(freqKhz, position, filter));
- if (!locA || !locB || (locA->get_freq() != locB->get_freq())) {
- return true; // not paired, ok
+ BOOST_FOREACH(PositionedID id, ids) {
+ FGNavRecord* station = (FGNavRecord*) cache->loadById(id);
+ if (!filter->pass(station)) {
+ continue;
+ }
+
+ stations.push_back(station);
}
-// 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);
+ return stations;
}
-// 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 )
+nav_list_type FGNavList::findByIdentAndFreq(const string& ident, const double freq,
+ TypeFilter* filter)
{
- 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;
- d2 = distSqr(station->cart(), aircraftCart);
- if ( d2 > min_dist || !navidUsable(station, aircraft)) {
- continue;
- }
-
- min_dist = d2;
- nav = station;
+ nav_list_type reply;
+ int f = (int)(freq*100.0 + 0.5);
+
+ FGPositioned::List stations = FGPositioned::findAllWithIdent(ident, filter);
+ BOOST_FOREACH(FGPositionedRef ref, stations) {
+ FGNavRecord* nav = static_cast<FGNavRecord*>(ref.ptr());
+ if ( f <= 0.0 || nav->get_freq() == f) {
+ reply.push_back( nav );
}
+ }
- return nav;
+ return reply;
}
-// Given a frequency, return the first matching station.
-FGNavRecord *FGNavList::findStationByFreq( double freq )
+// 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)
{
- const nav_list_type& stations = navaids[(int)(freq*100.0 + 0.5)];
-
- SG_LOG( SG_INSTR, SG_DEBUG, "findStationByFreq " << freq << " size " << stations.size() );
+ nav_list_type reply = findByIdentAndFreq( ident, freq, filter );
+ NavRecordDistanceSortPredicate sortPredicate( position );
+ std::sort( reply.begin(), reply.end(), sortPredicate );
- if (!stations.empty()) {
- return stations[0];
- }
- return NULL;
+ return reply;
}
-
-
// FGTACANList ----------------------------------------------------------------
FGTACANList::FGTACANList( void )