d9bfd5a425
SimGear change. It changes all the SG_xxxx to be the 'real' includes, and gets rid of many #ifdef SG_HAVE_STD_INCLUDES. As an added bonus, rather than replacing 'SG_USING_NAMESPACE(std)' with 'using namespace std', I just fixed the small number of places to use std:: explicitly. So we're no longer polluting the global namespace with the entire contents of std, in many cases. There is one more 'mechanical' change to come - getting rid of SG_USING_STD(X), but I want to keep that separate from everything else. (There's another mechnical change, replacing <math.h> with <cmath> and so on *everywhere*, but one step at a time)
295 lines
9.4 KiB
C++
295 lines
9.4 KiB
C++
// navdb.cxx -- top level navaids management routines
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//
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// Written by Curtis Olson, started May 2004.
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//
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// Copyright (C) 2004 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 <simgear/compiler.h>
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#include <string>
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#include <simgear/debug/logstream.hxx>
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#include <Airports/runways.hxx>
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#include <Airports/simple.hxx>
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#include <Main/globals.hxx>
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#include "navrecord.hxx"
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#include "navdb.hxx"
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SG_USING_STD( string );
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// load and initialize the navigational databases
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bool fgNavDBInit( FGAirportList *airports,
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FGNavList *navlist, FGNavList *loclist, FGNavList *gslist,
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FGNavList *dmelist, FGNavList *mkrlist,
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FGNavList *tacanlist, FGNavList *carrierlist,
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FGTACANList *channellist)
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{
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SG_LOG(SG_GENERAL, SG_INFO, "Loading Navaid Databases");
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// SG_LOG(SG_GENERAL, SG_INFO, " VOR/NDB");
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// SGPath p_nav( globals->get_fg_root() );
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// p_nav.append( "Navaids/default.nav" );
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// navlist->init( p_nav );
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// SG_LOG(SG_GENERAL, SG_INFO, " ILS and Marker Beacons");
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// beacons->init();
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// SGPath p_ils( globals->get_fg_root() );
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// p_ils.append( "Navaids/default.ils" );
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// ilslist->init( p_ils );
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SGPath path( globals->get_fg_root() );
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path.append( "Navaids/nav.dat" );
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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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// skip first two lines
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in >> skipeol;
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in >> skipeol;
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while ( ! in.eof() ) {
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FGNavRecord *r = new FGNavRecord;
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in >> (*r);
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if ( r->get_type() > 95 ) {
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delete r;
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break;
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}
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/*cout << "id = " << r->get_ident() << endl;
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cout << " type = " << r->get_type() << endl;
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cout << " lon = " << r->get_lon() << endl;
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cout << " lat = " << r->get_lat() << endl;
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cout << " elev = " <<r->get_elev_ft() << endl;
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cout << " freq = " << r->get_freq() << endl;
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cout << " range = " << r->get_range() << endl;
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cout << " name = " << r->get_name() << endl << endl; */
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// fudge elevation to the field elevation if it's not specified
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if ( fabs(r->get_elev_ft()) < 0.01 && r->get_apt_id().length() ) {
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// cout << r->get_type() << " " << r->get_apt_id() << " zero elev"
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// << endl;
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const FGAirport* a = airports->search( r->get_apt_id() );
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if ( a ) {
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r->set_elev_ft( a->getElevation() );
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// cout << " setting to " << a.elevation << endl;
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}
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}
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if ( r->get_type() == 2 || r->get_type() == 3 ) {
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// NDB=2, VOR=3
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navlist->add( r );
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} else if ( r->get_type() == 4 || r->get_type() == 5 ) {
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// ILS=4, LOC(only)=5
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loclist->add( r );
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} else if ( r->get_type() == 6 ) {
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// GS=6
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gslist->add( r );
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} else if ( r->get_type() == 7 || r->get_type() == 8
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|| r->get_type() == 9 )
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{
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// Marker Beacon = 7,8,9
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mkrlist->add( r );
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} else if ( r->get_type() == 12 || r->get_type() == 13) {
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// DME with ILS=12; standalone DME=13
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string str1( r->get_name() );
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string::size_type loc1= str1.find( "TACAN", 0 );
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string::size_type loc2 = str1.find( "VORTAC", 0 );
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if( loc1 != string::npos || loc2 != string::npos ){
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//cout << " name = " << r->get_name() ;
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//cout << " freq = " << r->get_freq() ;
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tacanlist->add( r );
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}
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dmelist->add( r );
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}
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in >> skipcomment;
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}
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// load the carrier navaids file
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string file, name;
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path = "";
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path = globals->get_fg_root() ;
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path.append( "Navaids/carrier_nav.dat" );
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file = path.str();
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SG_LOG( SG_GENERAL, SG_INFO, "opening file: " << path.str() );
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sg_gzifstream incarrier( path.str() );
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if ( !incarrier.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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// skip first two lines
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//incarrier >> skipeol;
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//incarrier >> skipeol;
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while ( ! incarrier.eof() ) {
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FGNavRecord *r = new FGNavRecord;
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incarrier >> (*r);
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carrierlist->add ( r );
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/*cout << " carrier lon: "<< r->get_lon() ;
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cout << " carrier lat: "<< r->get_lat() ;
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cout << " freq: " << r->get_freq() ;
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cout << " carrier name: "<< r->get_name() << endl;*/
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//if ( r->get_type() > 95 ) {
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// break;}
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} // end while
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// end loading the carrier navaids file
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// load the channel/freqency file
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string channel, freq;
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path="";
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path = globals->get_fg_root();
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path.append( "Navaids/TACAN_freq.dat" );
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SG_LOG( SG_GENERAL, SG_INFO, "opening file: " << path.str() );
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sg_gzifstream inchannel( path.str() );
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if ( !inchannel.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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// skip first line
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inchannel >> skipeol;
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while ( ! inchannel.eof() ) {
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FGTACANRecord *r = new FGTACANRecord;
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inchannel >> (*r);
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channellist->add ( r );
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//cout << "channel = " << r->get_channel() ;
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//cout << " freq = " << r->get_freq() << endl;
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} // end while
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// end ReadChanFile
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return true;
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}
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// Given a localizer record and it's corresponding runway record,
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// adjust the localizer position so it is in perfect alignment with
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// the runway.
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static void update_loc_position( FGNavRecord *loc, FGRunway *rwy,
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double threshold )
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{
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double hdg = rwy->_heading;
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hdg += 180.0;
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if ( hdg > 360.0 ) {
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hdg -= 360.0;
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}
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// calculate runway threshold point
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double thresh_lat, thresh_lon, return_az;
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geo_direct_wgs_84 ( 0.0, rwy->_lat, rwy->_lon, hdg,
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rwy->_length/2.0 * SG_FEET_TO_METER,
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&thresh_lat, &thresh_lon, &return_az );
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// cout << "Threshold = " << thresh_lat << "," << thresh_lon << endl;
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// calculate distance from threshold to localizer
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double az1, az2, dist_m;
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geo_inverse_wgs_84( 0.0, loc->get_lat(), loc->get_lon(),
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thresh_lat, thresh_lon,
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&az1, &az2, &dist_m );
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// cout << "Distance = " << dist_m << endl;
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// back project that distance along the runway center line
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double nloc_lat, nloc_lon;
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geo_direct_wgs_84 ( 0.0, thresh_lat, thresh_lon, hdg + 180.0,
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dist_m, &nloc_lat, &nloc_lon, &return_az );
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// printf("New localizer = %.6f %.6f\n", nloc_lat, nloc_lon );
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// sanity check, how far have we moved the localizer?
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geo_inverse_wgs_84( 0.0, loc->get_lat(), loc->get_lon(),
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nloc_lat, nloc_lon,
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&az1, &az2, &dist_m );
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// cout << "Distance moved = " << dist_m << endl;
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// cout << "orig heading = " << loc->get_multiuse() << endl;
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// cout << "new heading = " << rwy->_heading << endl;
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double hdg_diff = loc->get_multiuse() - rwy->_heading;
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// clamp to [-180.0 ... 180.0]
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if ( hdg_diff < -180.0 ) {
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hdg_diff += 360.0;
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} else if ( hdg_diff > 180.0 ) {
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hdg_diff -= 360.0;
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}
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if ( fabs(hdg_diff) <= threshold ) {
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loc->set_lat( nloc_lat );
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loc->set_lon( nloc_lon );
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loc->set_multiuse( rwy->_heading );
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}
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}
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// This routines traverses the localizer list and attempts to match
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// each entry with it's corresponding runway. When it is successful,
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// it then "moves" the localizer and updates it's heading so it
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// *perfectly* aligns with the runway, but is still the same distance
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// from the runway threshold.
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void fgNavDBAlignLOCwithRunway( FGRunwayList *runways, FGNavList *loclist,
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double threshold ) {
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nav_map_type navmap = loclist->get_navaids();
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nav_map_const_iterator freq = navmap.begin();
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while ( freq != navmap.end() ) {
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nav_list_type locs = freq->second;
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nav_list_const_iterator loc = locs.begin();
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while ( loc != locs.end() ) {
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string name = (*loc)->get_name();
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string::size_type pos1 = name.find(" ");
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string id = name.substr(0, pos1);
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name = name.substr(pos1+1);
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string::size_type pos2 = name.find(" ");
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string rwy = name.substr(0, pos2);
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FGRunway r;
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if ( runways->search(id, rwy, &r) ) {
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update_loc_position( (*loc), &r, threshold );
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}
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++loc;
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}
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++freq;
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}
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}
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