X-Git-Url: https://git.mxchange.org/?a=blobdiff_plain;f=src%2FNavaids%2Fnavlist.cxx;h=a145bac0d9d5d7090e4c237597062da2234d6366;hb=d8f5529d217c3710bcece9244f1f41cfb8550669;hp=18f0cb2cc6dfd5b00484dd89ad926cd503c37a78;hpb=a759908c7658562a573de86f68dd14a7cfab398c;p=flightgear.git diff --git a/src/Navaids/navlist.cxx b/src/Navaids/navlist.cxx index 18f0cb2cc..a145bac0d 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 @@ -16,104 +16,440 @@ // // 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" -// Constructor -FGNavList::FGNavList( void ) { +// Return true if the nav record matches the type +static bool isTypeMatch(const FGNavRecord* n, fg_nav_types type) { + switch(type) { + case FG_NAV_ANY: return(true); + case FG_NAV_VOR: return(n->get_type() == 3); + case FG_NAV_NDB: return(n->get_type() == 2); + case FG_NAV_ILS: return(n->get_type() == 4); // Note - very simplified, only matches loc as part of full ILS. + default: return false; + } } -// Destructor -FGNavList::~FGNavList( void ) { + +// FGNavList ------------------------------------------------------------------ + +FGNavList::FGNavList( void ) +{ } -// load the navaids and build the map -bool FGNavList::init( FGPath path ) { - FGNav n; +FGNavList::~FGNavList( void ) +{ + navaids_by_tile.erase( navaids_by_tile.begin(), navaids_by_tile.end() ); + nav_list_type navlist = navaids.begin()->second; + navaids.erase( navaids.begin(), navaids.end() ); +} + +// load the navaids and build the map +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() ); + navaids_by_tile.erase( navaids_by_tile.begin(), navaids_by_tile.end() ); + ident_navaids.erase( ident_navaids.begin(), ident_navaids.end() ); - fg_gzifstream in( path.str() ); - if ( !in.is_open() ) { - FG_LOG( FG_GENERAL, FG_ALERT, "Cannot open file: " << path.str() ); - exit(-1); - } + return true; +} - // read in each line of the file - in >> skipeol; - in >> skipcomment; +// real add a marker beacon +static void real_add( nav_map_type &navmap, const int master_index, + FGNavRecord *n ) +{ + navmap[master_index].push_back( n ); +} -#ifdef __MWERKS__ - 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; +// front end for add a marker beacon +static void tile_add( nav_map_type &navmap, FGNavRecord *n ) +{ + double diff = 0; + + double lon = n->get_lon(); + double lat = n->get_lat(); + + 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; -#else - - 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; + int latidx = (int)lat; + diff = lat - (double)latidx; + if ( (lat < 0.0) && (fabs(diff) > SG_EPSILON) ) { + latidx -= 1; } + 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 ); + } +} -#endif +// 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; } -// 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, double *heading, double *dist ) +FGNavRecord *FGNavList::findByFreq( double freq, double lon, double lat, double elev ) +{ + const nav_list_type& stations = navaids[(int)(freq*100.0 + 0.5)]; + + SGGeod geod = SGGeod::fromRadM(lon, lat, elev); + SGVec3d aircraft = SGVec3d::fromGeod(geod); + SG_LOG( SG_INSTR, SG_DEBUG, "findbyFreq " << freq << " size " << stations.size() ); + + return findNavFromList( aircraft, stations ); +} + + +FGNavRecord *FGNavList::findByIdent( const char* ident, + const double lon, const double lat ) +{ + const nav_list_type& stations = ident_navaids[ident]; + SGGeod geod = SGGeod::fromRad(lon, lat); + SGVec3d aircraft = SGVec3d::fromGeod(geod); + return findNavFromList( aircraft, stations ); +} + + +nav_list_type FGNavList::findFirstByIdent( const string& ident, fg_nav_types type, bool exact) +{ + nav_list_type n2; + n2.clear(); + + int iType; + if(type == FG_NAV_VOR) iType = 3; + else if(type == FG_NAV_NDB) iType = 2; + else return(n2); + + nav_ident_map_iterator it; + if(exact) { + it = ident_navaids.find(ident); + } else { + bool typeMatch = false; + int safety_count = 0; + it = ident_navaids.lower_bound(ident); + while(!typeMatch) { + nav_list_type n0 = it->second; + // local copy, so we should be able to do anything with n0. + // Remove the types that don't match request. + for(nav_list_iterator it0 = n0.begin(); it0 != n0.end();) { + FGNavRecord* nv = *it0; + if(nv->get_type() == iType) { + typeMatch = true; + ++it0; + } else { + it0 = n0.erase(it0); + } + } + if(typeMatch) { + return(n0); + } + if(it == ident_navaids.begin()) { + // We didn't find a match before reaching the beginning of the map + n0.clear(); + return(n0); + } + safety_count++; + if(safety_count == 1000000) { + SG_LOG(SG_INSTR, SG_ALERT, + "safety_count triggered exit from while loop in findFirstByIdent!"); + break; + } + ++it; + if(it == ident_navaids.end()) { + n0.clear(); + return(n0); + } + } + } + if(it == ident_navaids.end()) { + n2.clear(); + return(n2); + } else { + nav_list_type n1 = it->second; + n2.clear(); + for(nav_list_iterator it2 = n1.begin(); it2 != n1.end(); ++it2) { + FGNavRecord* nv = *it2; + if(nv->get_type() == iType) n2.push_back(nv); + } + return(n2); + } +} + + +// Given an Ident and optional freqency, return the first matching +// station. +FGNavRecord *FGNavList::findByIdentAndFreq( const char* ident, const double freq ) +{ + nav_list_type stations = ident_navaids[ident]; + SG_LOG( SG_INSTR, SG_DEBUG, "findByIdent " << ident<< " size " << stations.size() ); + 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); + nav_list_const_iterator it, end = stations.end(); + for ( it = stations.begin(); it != end; ++it ) { + if ( f == (*it)->get_freq() ) { + return (*it); + } + } + } else if (!stations.empty()) { + 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 SGVec3d &aircraft, + const nav_list_type &stations ) { - nav_list_type stations = navaids[(int)(freq*100.0)]; + 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; + + 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->get_cart(), aircraft); + + // cout << " dist = " << sqrt(d) + // << " range = " << current->get_range() * SG_NM_TO_METER + // << endl; + + // 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.) + int type = station->get_type(); + if ( d2 < min_dist && + (type == 4 || type == 5 || type == 6 || type == 12 || type == 13) ) + { + double hdg_deg = 0.0; + if ( type == 4 || type == 5 ){ + hdg_deg = station->get_multiuse(); - nav_list_iterator current = stations.begin(); - nav_list_iterator last = stations.end(); + } else if ( type == 6 ) { + int tmp = (int)(station->get_multiuse() / 1000.0); + hdg_deg = station->get_multiuse() - (tmp * 1000); + + } else if ( type == 12 || type == 13 ) { + // oops, Robin's data format doesn't give us the + // needed information to compute a heading for a DME + // transmitter. FIXME Robin! + } + + double az1 = 0.0, az2 = 0.0, s = 0.0; + SGGeod geod = SGGeod::fromCart(aircraft); + geo_inverse_wgs_84( geod, station->get_pos(), &az1, &az2, &s); + az1 = az1 - station->get_multiuse(); + if ( az1 > 180.0) az1 -= 360.0; + if ( az1 < -180.0) az1 += 360.0; + // penalize opposite facing stations by adding 5000 meters + // (squared) which is further than matching stations would + // ever be placed from each other. + if ( fabs(az1) > 90.0 ) { + double dist = sqrt(d2); + d2 = (dist + 5000) * (dist + 5000); + } + } + + if ( d2 < min_dist ) { + min_dist = d2; + nav = station; + } + } + + return nav; +} + + +// returns the closest entry to the give lon/lat/elev +FGNavRecord *FGNavList::findClosest( double lon_rad, double lat_rad, + double elev_m, fg_nav_types type) +{ + 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; + + 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; + + const nav_list_type& navs = navaids_by_tile[ master_index ]; + // cout << "Master index = " << master_index << endl; + // cout << "beacon search length = " << beacons.size() << endl; + + nav_list_const_iterator current = navs.begin(); + nav_list_const_iterator last = navs.end(); + + SGGeod geod = SGGeod::fromRadM(lon_rad, lat_rad, elev_m); + SGVec3d aircraft = SGVec3d::fromGeod(geod); + + double min_dist = 999999999.0; - double az1, az2, s; for ( ; current != last ; ++current ) { - // cout << "testing " << current->get_ident() << endl; - geo_inverse_wgs_84( elev, lat, lon, - current->get_lat(), current->get_lon(), - &az1, &az2, &s ); - // cout << " dist = " << s << endl; - if ( s < ( current->get_range() * NM_TO_METER ) ) { - *n = *current; - *heading = az2; - *dist = s; - return true; - } + if(isTypeMatch(*current, type)) { + // cout << " testing " << (*current)->get_ident() << endl; + + double d = distSqr((*current)->get_cart(), aircraft); + // 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); + } + } + } + + // cout << "lon = " << lon << " lat = " << lat + // << " closest beacon = " << sqrt( min_dist ) << endl; + + return result; +} + +// 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; +} + + + +// FGTACANList ---------------------------------------------------------------- + +FGTACANList::FGTACANList( void ) +{ +} + + +FGTACANList::~FGTACANList( void ) +{ +} + + +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_INSTR, SG_DEBUG, "findByChannel " << channel<< " size " << stations.size() ); - return false; + if (!stations.empty()) { + return stations[0]; + } + return NULL; } + +