X-Git-Url: https://git.mxchange.org/?a=blobdiff_plain;f=src%2FNavaids%2Fnavlist.cxx;h=66d990d5cd987f0cda3aa54c03a4fe5c37595b13;hb=e171f0ecdbbdac03d35a2dd022b14a98989c3984;hp=75f15ee90a8c5c116b23b21b78e5cfbdd0c4d348;hpb=2e08c972048c9d0ee321d0ad960dadd5c21a573f;p=flightgear.git diff --git a/src/Navaids/navlist.cxx b/src/Navaids/navlist.cxx index 75f15ee90..66d990d5c 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 +16,218 @@ // // 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 "navlist.hxx" +using std::string; -FGNavList *current_navlist; +// FGNavList ------------------------------------------------------------------ - -// Constructor -FGNavList::FGNavList( void ) { +FGNavList::FGNavList( void ) +{ } -// Destructor -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( FGPath path ) { - FGNav n; - +bool FGNavList::init() +{ + // 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; +} - fg_gzifstream in( path.str() ); - if ( !in.is_open() ) { - FG_LOG( FG_GENERAL, FG_ALERT, "Cannot open file: " << path.str() ); - exit(-1); - } +// add an entry to the lists +bool FGNavList::add( FGNavRecord *n ) +{ + navaids[n->get_freq()].push_back(n); + return true; +} - // read in each line of the file +FGNavRecord *FGNavList::findByFreq( double freq, const SGGeod& position) +{ + 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 ); +} - in >> skipeol; - in >> skipcomment; +class VORNDBFilter : public FGPositioned::Filter +{ +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 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; + } + + cur = FGPositioned::findNextWithPartialId(cur, ident, &filter); + } -#ifdef __MWERKS__ + return NULL; +} - 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; +// 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 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; + } } -#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(); - } - } + return nav; +} + +// Given a frequency, return the first matching station. +FGNavRecord *FGNavList::findStationByFreq( double freq ) +{ + const nav_list_type& stations = navaids[(int)(freq*100.0 + 0.5)]; + + SG_LOG( SG_INSTR, SG_DEBUG, "findStationByFreq " << freq << " size " << stations.size() ); + + if (!stations.empty()) { + return stations[0]; } + return NULL; +} - // cout << "min freq = " << min << endl; - // cout << "max freq = " << max << endl; -#endif +// FGTACANList ---------------------------------------------------------------- + +FGTACANList::FGTACANList( void ) +{ +} + + +FGTACANList::~FGTACANList( void ) +{ +} + + +bool FGTACANList::init() +{ return true; } -// 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 ) +// add an entry to the lists +bool FGTACANList::add( FGTACANRecord *c ) { - nav_list_type stations = navaids[(int)(freq*100.0 + 0.5)]; - - nav_list_iterator current = stations.begin(); - nav_list_iterator last = stations.end(); - - // 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()); - - 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; - } - } + ident_channels[c->get_channel()].push_back(c); + return true; +} - return false; + +// 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_INSTR, SG_DEBUG, "findByChannel " << channel<< " size " << stations.size() ); + + if (!stations.empty()) { + return stations[0]; + } + return NULL; } + +