8cc7b283d5
if the station is too far away. Instead, simply return the closest station. All the code that searches navaids does it's own range checking anyway. This will make the navlist query functions a bit more useful for other types of functionality where you may need to lookup a station without consideration of range (i.e. presetting your position relative to a navaid.)
88 lines
2.6 KiB
C++
88 lines
2.6 KiB
C++
// navlist.hxx -- navaids management class
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//
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// Written by Curtis Olson, started April 2000.
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//
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// Copyright (C) 2000 Curtis L. Olson - curt@flightgear.org
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//
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// This program is free software; you can redistribute it and/or
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// modify it under the terms of the GNU General Public License as
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// published by the Free Software Foundation; either version 2 of the
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// License, or (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful, but
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// WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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//
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// $Id$
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#ifndef _FG_NAVLIST_HXX
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#define _FG_NAVLIST_HXX
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#include <simgear/compiler.h>
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#include <simgear/misc/sg_path.hxx>
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#include <map>
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#include <vector>
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#include STL_STRING
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#include "nav.hxx"
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SG_USING_STD(map);
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SG_USING_STD(vector);
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SG_USING_STD(string);
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class FGNavList {
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// convenience types
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typedef vector < FGNav* > nav_list_type;
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typedef nav_list_type::iterator nav_list_iterator;
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typedef nav_list_type::const_iterator nav_list_const_iterator;
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typedef map < int, nav_list_type > nav_map_type;
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typedef nav_map_type::iterator nav_map_iterator;
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typedef nav_map_type::const_iterator nav_map_const_iterator;
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typedef map < string, nav_list_type > nav_ident_map_type;
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nav_map_type navaids;
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nav_ident_map_type ident_navaids;
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// Given a point and a list of stations, return the closest one to
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// the specified point.
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FGNav *findNavFromList( const Point3D &aircraft,
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const nav_list_type &stations );
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public:
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FGNavList();
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~FGNavList();
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// load the navaids and build the map
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bool init( SGPath path );
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// Query the database for the specified frequency. It is assumed
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// that there will be multiple stations with matching frequencies
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// so a position must be specified. Lon and lat are in degrees,
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// elev is in meters.
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FGNav *findByFreq( double freq, double lon, double lat, double elev );
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// locate closest item in the DB matching the requested ident
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FGNav *findByIdent( const char* ident, const double lon, const double lat );
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// Given an Ident and optional freqency, return the first matching
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// station.
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FGNav *findByIdentAndFreq( const char* ident, const double freq = 0.0 );
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};
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extern FGNavList *current_navlist;
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#endif // _FG_NAVLIST_HXX
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