1 // atislist.cxx -- navaids management class
3 // Written by Curtis Olson, started April 2000.
5 // Copyright (C) 2000 Curtis L. Olson - curt@flightgear.org
7 // This program is free software; you can redistribute it and/or
8 // modify it under the terms of the GNU General Public License as
9 // published by the Free Software Foundation; either version 2 of the
10 // License, or (at your option) any later version.
12 // This program is distributed in the hope that it will be useful, but
13 // WITHOUT ANY WARRANTY; without even the implied warranty of
14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 // General Public License for more details.
17 // You should have received a copy of the GNU General Public License
18 // along with this program; if not, write to the Free Software
19 // Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
26 #include <simgear/debug/logstream.hxx>
27 #include <simgear/misc/sgstream.hxx>
28 #include <simgear/math/sg_geodesy.hxx>
30 #include "atislist.hxx"
33 FGATISList *current_atislist;
37 FGATISList::FGATISList( void ) {
42 FGATISList::~FGATISList( void ) {
46 // load the navaids and build the map
47 bool FGATISList::init( SGPath path ) {
50 atislist.erase( atislist.begin(), atislist.end() );
52 sg_gzifstream in( path.str() );
53 if ( !in.is_open() ) {
54 SG_LOG( SG_GENERAL, SG_ALERT, "Cannot open file: " << path.str() );
58 // read in each line of the file
66 while ( in.get(c) && c != '\0' && a.get_type() != '[' ) {
69 if ( a.get_type() != '[' ) {
70 atislist[a.get_freq()].push_back(a);
80 while ( ! in.eof() && a.get_type() != '[' ) {
82 //cout << "id = " << a.get_ident() << endl;
83 //cout << " type = " << a.get_type() << endl;
84 //cout << " lon = " << a.get_lon() << endl;
85 //cout << " lat = " << a.get_lat() << endl;
86 //cout << " elev = " << a.get_elev() << endl;
87 //cout << " freq = " << a.get_freq() << endl;
88 //cout << " range = " << a.get_range() << endl;
89 if ( a.get_type() != '[' ) {
90 atislist[a.get_freq()].push_back(a);
94 if ( a.get_type() != 'N' ) {
95 if ( a.get_freq() < min ) {
98 if ( a.get_freq() > max ) {
104 // cout << "min freq = " << min << endl;
105 // cout << "max freq = " << max << endl;
113 // query the database for the specified frequency, lon and lat are in
114 // degrees, elev is in meters
115 bool FGATISList::query( double lon, double lat, double elev, double freq,
118 atis_list_type stations = atislist[(int)(freq*100.0 + 0.5)];
120 atis_list_iterator current = stations.begin();
121 atis_list_iterator last = stations.end();
123 // double az1, az2, s;
124 Point3D aircraft = sgGeodToCart( Point3D(lon, lat, elev) );
127 for ( ; current != last ; ++current ) {
128 //cout << "testing " << current->get_ident() << endl;
129 station = Point3D(current->get_x(), current->get_y(), current->get_z());
130 //cout << "aircraft = " << aircraft << endl;
131 //cout << "station = " << station << endl;
133 d = aircraft.distance3Dsquared( station );
135 //cout << " dist = " << sqrt(d)
136 // << " range = " << current->get_range() * SG_NM_TO_METER << endl;
138 // match up to twice the published range so we can model
139 // reduced signal strength
140 if ( d < (2 * current->get_range() * SG_NM_TO_METER
141 * 2 * current->get_range() * SG_NM_TO_METER ) ) {
142 //cout << "matched = " << current->get_ident() << endl;