2 // simple.cxx -- a really simplistic class to manage airport ID,
3 // lat, lon of the center of one of it's runways, and
6 // Written by Curtis Olson, started April 1998.
8 // Copyright (C) 1998 Curtis L. Olson - curt@me.umn.edu
10 // This program is free software; you can redistribute it and/or
11 // modify it under the terms of the GNU General Public License as
12 // published by the Free Software Foundation; either version 2 of the
13 // License, or (at your option) any later version.
15 // This program is distributed in the hope that it will be useful, but
16 // WITHOUT ANY WARRANTY; without even the implied warranty of
17 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 // General Public License for more details.
20 // You should have received a copy of the GNU General Public License
21 // along with this program; if not, write to the Free Software
22 // Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
30 #include <simgear/compiler.h>
32 #include <simgear/debug/logstream.hxx>
33 #include <simgear/misc/sgstream.hxx>
40 SG_USING_NAMESPACE(std);
41 SG_USING_STD(istream);
45 operator >> ( istream& in, FGAirport& a )
48 in >> junk >> a.id >> a.latitude >> a.longitude >> a.elevation
51 char name[256]; // should never be longer than this, right? :-)
52 in.getline( name, 256 );
55 a.has_metar = true; // assume true
61 FGAirportList::FGAirportList( const string& file ) {
62 SG_LOG( SG_GENERAL, SG_DEBUG, "Reading simple airport list: " << file );
64 // open the specified file for reading
65 sg_gzifstream in( file );
66 if ( !in.is_open() ) {
67 SG_LOG( SG_GENERAL, SG_ALERT, "Cannot open file: " << file );
78 airports_by_id[a.id] = a;
79 airports_array.push_back( &airports_by_id[a.id] );
85 // search for the specified id
86 FGAirport FGAirportList::search( const string& id) {
88 return airports_by_id[id];
92 // search for the airport nearest the specified position
93 FGAirport FGAirportList::search( double lon_deg, double lat_deg,
96 double min_dist = 360.0;
98 for ( i = 0; i < airports_array.size(); ++i ) {
99 // crude manhatten distance based on lat/lon difference
100 double d = fabs(lon_deg - airports_array[i]->longitude)
101 + fabs(lat_deg - airports_array[i]->latitude);
102 if ( d < min_dist ) {
103 if ( !with_metar || (with_metar && airports_array[i]->has_metar) ) {
110 return *airports_array[closest];
115 FGAirportList::~FGAirportList( void ) {
119 FGAirportList::size () const
121 return airports_array.size();
124 const FGAirport FGAirportList::getAirport( int index ) const
126 return *airports_array[index];
131 * Mark the specified airport record as not having metar
133 void FGAirportList::no_metar( const string &id ) {
134 airports_by_id[id].has_metar = false;