121 lines
2.9 KiB
C++
121 lines
2.9 KiB
C++
// fixlist.cxx -- fix list 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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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif
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#include <simgear/debug/logstream.hxx>
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#include <simgear/misc/sgstream.hxx>
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#include <simgear/math/sg_geodesy.hxx>
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#include "fixlist.hxx"
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FGFixList *current_fixlist;
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// Constructor
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FGFixList::FGFixList( void ) {
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}
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// Destructor
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FGFixList::~FGFixList( void ) {
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}
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// load the navaids and build the map
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bool FGFixList::init( SGPath path ) {
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fixlist.erase( fixlist.begin(), fixlist.end() );
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sg_gzifstream in( path.str() );
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if ( !in.is_open() ) {
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SG_LOG( SG_GENERAL, SG_ALERT, "Cannot open file: " << path.str() );
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exit(-1);
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}
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// read in each line of the file
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in >> skipeol;
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in >> skipcomment;
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#ifdef __MWERKS__
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char c = 0;
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while ( in.get(c) && c != '\0' ) {
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in.putback(c);
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#else
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while ( ! in.eof() ) {
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#endif
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FGFix fix;
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in >> fix;
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if ( fix.get_ident() == "[End]" ) {
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break;
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}
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/* cout << "ident=" << fix.get_ident()
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<< ", lat=" << fix.get_lat()
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<< ", lon=" << fix.get_lon() << endl; */
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fixlist[fix.get_ident()] = fix;
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in >> skipcomment;
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}
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return true;
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}
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// query the database for the specified fix, lon and lat are in
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// degrees, elev is in meters
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bool FGFixList::query( const string& ident, FGFix *fix ) {
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*fix = fixlist[ident];
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if ( ! fix->get_ident().empty() ) {
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return true;
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} else {
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return false;
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}
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}
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// query the database for the specified fix, lon and lat are in
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// degrees, elev is in meters
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bool FGFixList::query_and_offset( const string& ident, double lon, double lat,
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double elev, FGFix *fix, double *heading,
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double *dist )
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{
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*fix = fixlist[ident];
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if ( fix->get_ident().empty() ) {
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return false;
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}
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double az1, az2, s;
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geo_inverse_wgs_84( elev, lat, lon,
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fix->get_lat(), fix->get_lon(),
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&az1, &az2, &s );
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// cout << " dist = " << s << endl;
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*heading = az2;
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*dist = s;
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return true;
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}
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