//
// Written by Curtis Olson, started May 2004.
//
-// Copyright (C) 2004 Curtis L. Olson - curt@flightgear.org
+// Copyright (C) 2004 Curtis L. Olson - http://www.flightgear.org/~curt
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License as
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
-// Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
//
// $Id$
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#include <simgear/compiler.h>
+
+#include STL_STRING
#include <simgear/debug/logstream.hxx>
+#include <Airports/runways.hxx>
+#include <Airports/simple.hxx>
#include <Main/globals.hxx>
#include "navrecord.hxx"
-
#include "navdb.hxx"
+SG_USING_STD( string );
+
// load and initialize the navigational databases
-bool fgNavDBInit( FGNavList *navlist, FGNavList *loclist, FGNavList *gslist,
- FGNavList *dmelist, FGNavList *mkrlist )
+bool fgNavDBInit( FGAirportList *airports,
+ FGNavList *navlist, FGNavList *loclist, FGNavList *gslist,
+ FGNavList *dmelist, FGNavList *mkrlist,
+ FGNavList *tacanlist, FGNavList *carrierlist,
+ FGTACANList *channellist)
{
SG_LOG(SG_GENERAL, SG_INFO, "Loading Navaid Databases");
// SG_LOG(SG_GENERAL, SG_INFO, " VOR/NDB");
#ifdef __MWERKS__
+
+ FIXME -- Please report to the FlightGear mailing list, if you still use a
+ compiler identifying itself as __MWERKS__ that needs this hack.
+ There are 41 instances of it in the SimGear & FilghtGear code,
+ and they are scheduled for removal.
+
char c = 0;
- while ( in.get(c) && c != '\0' ) {
+ while ( in.get(c) && c != '\0' ) {
in.putback(c);
#else
while ( ! in.eof() ) {
FGNavRecord *r = new FGNavRecord;
in >> (*r);
if ( r->get_type() > 95 ) {
+ delete r;
break;
}
- /* cout << "id = " << n.get_ident() << endl;
- cout << " type = " << n.get_type() << endl;
- cout << " lon = " << n.get_lon() << endl;
- cout << " lat = " << n.get_lat() << endl;
- cout << " elev = " << n.get_elev() << endl;
- cout << " freq = " << n.get_freq() << endl;
- cout << " range = " << n.get_range() << endl << endl; */
+ /*cout << "id = " << r->get_ident() << endl;
+ cout << " type = " << r->get_type() << endl;
+ cout << " lon = " << r->get_lon() << endl;
+ cout << " lat = " << r->get_lat() << endl;
+ cout << " elev = " <<r->get_elev_ft() << endl;
+ cout << " freq = " << r->get_freq() << endl;
+ cout << " range = " << r->get_range() << endl;
+ cout << " name = " << r->get_name() << endl << endl; */
+
+ // fudge elevation to the field elevation if it's not specified
+ if ( fabs(r->get_elev_ft()) < 0.01 && r->get_apt_id().length() ) {
+ // cout << r->get_type() << " " << r->get_apt_id() << " zero elev"
+ // << endl;
+ const FGAirport* a = airports->search( r->get_apt_id() );
+ if ( a ) {
+ r->set_elev_ft( a->getElevation() );
+ // cout << " setting to " << a.elevation << endl;
+ }
+ }
if ( r->get_type() == 2 || r->get_type() == 3 ) {
// NDB=2, VOR=3
{
// Marker Beacon = 7,8,9
mkrlist->add( r );
- } else if ( r->get_type() == 12 ) {
- // DME=12
+ } else if ( r->get_type() == 12 || r->get_type() == 13) {
+ // DME with ILS=12; standalone DME=13
+ string str1( r->get_name() );
+ string::size_type loc1= str1.find( "TACAN", 0 );
+ string::size_type loc2 = str1.find( "VORTAC", 0 );
+
+ if( loc1 != string::npos || loc2 != string::npos ){
+ //cout << " name = " << r->get_name() ;
+ //cout << " freq = " << r->get_freq() ;
+ tacanlist->add( r );
+ }
+
dmelist->add( r );
+
}
in >> skipcomment;
}
- // cout << "min freq = " << min << endl;
- // cout << "max freq = " << max << endl;
+// load the carrier navaids file
+
+ string file, name;
+ path = "";
+ path = globals->get_fg_root() ;
+ path.append( "Navaids/carrier_nav.dat" );
+
+ file = path.str();
+ SG_LOG( SG_GENERAL, SG_INFO, "opening file: " << path.str() );
+
+ sg_gzifstream incarrier( path.str() );
+
+ if ( !incarrier.is_open() ) {
+ SG_LOG( SG_GENERAL, SG_ALERT, "Cannot open file: " << path.str() );
+ exit(-1);
+ }
+
+ // skip first two lines
+ //incarrier >> skipeol;
+ //incarrier >> skipeol;
+
+#ifdef __MWERKS__
+ char c = 0;
+ while ( incarrier.get(c) && c != '\0' ) {
+ incarrier.putback(c);
+#else
+ while ( ! incarrier.eof() ) {
+#endif
+
+ FGNavRecord *r = new FGNavRecord;
+ incarrier >> (*r);
+ carrierlist->add ( r );
+ /*cout << " carrier lon: "<< r->get_lon() ;
+ cout << " carrier lat: "<< r->get_lat() ;
+ cout << " freq: " << r->get_freq() ;
+ cout << " carrier name: "<< r->get_name() << endl;*/
+
+ //if ( r->get_type() > 95 ) {
+ // break;}
+ } // end while
+
+// end loading the carrier navaids file
+
+// load the channel/freqency file
+ string channel, freq;
+ path="";
+ path = globals->get_fg_root();
+ path.append( "Navaids/TACAN_freq.dat" );
+
+ SG_LOG( SG_GENERAL, SG_INFO, "opening file: " << path.str() );
+
+ sg_gzifstream inchannel( path.str() );
+
+ if ( !inchannel.is_open() ) {
+ SG_LOG( SG_GENERAL, SG_ALERT, "Cannot open file: " << path.str() );
+ exit(-1);
+ }
+
+ // skip first line
+ inchannel >> skipeol;
+
+#ifdef __MWERKS__
+ char c = 0;
+ while ( inchannel.get(c) && c != '\0' ) {
+ in.putback(c);
+#else
+ while ( ! inchannel.eof() ) {
+#endif
+
+ FGTACANRecord *r = new FGTACANRecord;
+ inchannel >> (*r);
+ channellist->add ( r );
+ //cout << "channel = " << r->get_channel() ;
+ //cout << " freq = " << r->get_freq() << endl;
+
+ } // end while
+
+
+ // end ReadChanFile
+
return true;
}
+
+
+// Given a localizer record and it's corresponding runway record,
+// adjust the localizer position so it is in perfect alignment with
+// the runway.
+static void update_loc_position( FGNavRecord *loc, FGRunway *rwy,
+ double threshold )
+{
+ double hdg = rwy->_heading;
+ hdg += 180.0;
+ if ( hdg > 360.0 ) {
+ hdg -= 360.0;
+ }
+
+ // calculate runway threshold point
+ double thresh_lat, thresh_lon, return_az;
+ geo_direct_wgs_84 ( 0.0, rwy->_lat, rwy->_lon, hdg,
+ rwy->_length/2.0 * SG_FEET_TO_METER,
+ &thresh_lat, &thresh_lon, &return_az );
+ // cout << "Threshold = " << thresh_lat << "," << thresh_lon << endl;
+
+ // calculate distance from threshold to localizer
+ double az1, az2, dist_m;
+ geo_inverse_wgs_84( 0.0, loc->get_lat(), loc->get_lon(),
+ thresh_lat, thresh_lon,
+ &az1, &az2, &dist_m );
+ // cout << "Distance = " << dist_m << endl;
+
+ // back project that distance along the runway center line
+ double nloc_lat, nloc_lon;
+ geo_direct_wgs_84 ( 0.0, thresh_lat, thresh_lon, hdg + 180.0,
+ dist_m, &nloc_lat, &nloc_lon, &return_az );
+ // printf("New localizer = %.6f %.6f\n", nloc_lat, nloc_lon );
+
+ // sanity check, how far have we moved the localizer?
+ geo_inverse_wgs_84( 0.0, loc->get_lat(), loc->get_lon(),
+ nloc_lat, nloc_lon,
+ &az1, &az2, &dist_m );
+ // cout << "Distance moved = " << dist_m << endl;
+
+ // cout << "orig heading = " << loc->get_multiuse() << endl;
+ // cout << "new heading = " << rwy->_heading << endl;
+
+ double hdg_diff = loc->get_multiuse() - rwy->_heading;
+
+ // clamp to [-180.0 ... 180.0]
+ if ( hdg_diff < -180.0 ) {
+ hdg_diff += 360.0;
+ } else if ( hdg_diff > 180.0 ) {
+ hdg_diff -= 360.0;
+ }
+
+ if ( fabs(hdg_diff) <= threshold ) {
+ loc->set_lat( nloc_lat );
+ loc->set_lon( nloc_lon );
+ loc->set_multiuse( rwy->_heading );
+ }
+}
+
+
+// This routines traverses the localizer list and attempts to match
+// each entry with it's corresponding runway. When it is successful,
+// it then "moves" the localizer and updates it's heading so it
+// *perfectly* aligns with the runway, but is still the same distance
+// from the runway threshold.
+void fgNavDBAlignLOCwithRunway( FGRunwayList *runways, FGNavList *loclist,
+ double threshold ) {
+ nav_map_type navmap = loclist->get_navaids();
+
+ nav_map_const_iterator freq = navmap.begin();
+ while ( freq != navmap.end() ) {
+ nav_list_type locs = freq->second;
+ nav_list_const_iterator loc = locs.begin();
+ while ( loc != locs.end() ) {
+ string name = (*loc)->get_name();
+ string::size_type pos1 = name.find(" ");
+ string id = name.substr(0, pos1);
+ name = name.substr(pos1+1);
+ string::size_type pos2 = name.find(" ");
+ string rwy = name.substr(0, pos2);
+
+ FGRunway r;
+ if ( runways->search(id, rwy, &r) ) {
+ update_loc_position( (*loc), &r, threshold );
+ }
+ ++loc;
+ }
+ ++freq;
+ }
+}
+
projects / flightgear.git / blobdiff