9b900e9430
Cache the parsed navigation and airport data in a binary file to reduce startup times and memory consumption (since only referenced FGPositioned elements are held in memory). Data will be reimported when the mod-time of any input file is changed. If a global file is changed (nav.dat, awy.dat, apt.dat, etc), the cache will be completely rebuilt, which takes approximately 30 seconds on moderate hardware. (Future work may reduce this).
75 lines
1.9 KiB
C++
75 lines
1.9 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 - http://www.flightgear.org/~curt
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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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, 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 <algorithm>
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#include <simgear/debug/logstream.hxx>
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#include <simgear/misc/sgstream.hxx>
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#include <simgear/misc/sg_path.hxx>
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#include <simgear/math/sg_geodesy.hxx>
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#include "fixlist.hxx"
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#include <Navaids/fix.hxx>
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#include <Navaids/NavDataCache.hxx>
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FGFix::FGFix(PositionedID aGuid, const std::string& aIdent, const SGGeod& aPos) :
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FGPositioned(aGuid, FIX, aIdent, aPos)
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{
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}
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namespace flightgear
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{
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void loadFixes(const SGPath& path)
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{
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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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// toss the first two lines of the file
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in >> skipeol;
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in >> skipeol;
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NavDataCache* cache = NavDataCache::instance();
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// read in each remaining line of the file
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while ( ! in.eof() ) {
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double lat, lon;
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std::string ident;
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in >> lat >> lon >> ident;
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if (lat > 95) break;
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cache->insertFix(ident, SGGeod::fromDeg(lon, lat));
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in >> skipcomment;
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}
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}
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} // of namespace flightgear;
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