X-Git-Url: https://git.mxchange.org/?a=blobdiff_plain;f=src%2FNavaids%2Fnavlist.cxx;h=a145bac0d9d5d7090e4c237597062da2234d6366;hb=d8f5529d217c3710bcece9244f1f41cfb8550669;hp=691431889f1b8e59570bb7f8fe24ea111f3f694a;hpb=d5a5c9bb0e3ea232f789e0c440ecb73f5cca3e85;p=flightgear.git

diff --git a/src/Navaids/navlist.cxx b/src/Navaids/navlist.cxx
index 691431889..a145bac0d 100644
--- a/src/Navaids/navlist.cxx
+++ b/src/Navaids/navlist.cxx
@@ -2,7 +2,7 @@
 //
 // Written by Curtis Olson, started April 2000.
 //
-// Copyright (C) 2000  Curtis L. Olson - curt@flightgear.org
+// Copyright (C) 2000  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
@@ -16,7 +16,7 @@
 //
 // 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.
 //
 // $Id$
 
@@ -32,20 +32,40 @@
 #include "navlist.hxx"
 
 
-// Constructor
-FGNavList::FGNavList( void ) {
+// Return true if the nav record matches the type
+static bool isTypeMatch(const FGNavRecord* n, fg_nav_types type) {
+    switch(type) {
+        case FG_NAV_ANY: return(true);
+        case FG_NAV_VOR: return(n->get_type() == 3);
+        case FG_NAV_NDB: return(n->get_type() == 2);
+        case FG_NAV_ILS: return(n->get_type() == 4);	// Note - very simplified, only matches loc as part of full ILS.
+        default: return false;
+    }
 }
 
 
-// Destructor
-FGNavList::~FGNavList( void ) {
+
+// FGNavList ------------------------------------------------------------------
+
+FGNavList::FGNavList( void )
+{
 }
 
 
-// load the navaids and build the map
-bool FGNavList::init() {
+FGNavList::~FGNavList( void )
+{
+    navaids_by_tile.erase( navaids_by_tile.begin(), navaids_by_tile.end() );
+    nav_list_type navlist = navaids.begin()->second;
+    navaids.erase( navaids.begin(), navaids.end() );
+}
 
-    // FIXME: leaves all the individual navaid entries leaked
+
+// load the navaids and build the map
+bool FGNavList::init()
+{
+    // No need to delete the original navaid structures
+    // since we're using an SGSharedPointer
+    nav_list_type navlist = navaids.begin()->second;
     navaids.erase( navaids.begin(), navaids.end() );
     navaids_by_tile.erase( navaids_by_tile.begin(), navaids_by_tile.end() );
     ident_navaids.erase( ident_navaids.begin(), ident_navaids.end() );
@@ -63,8 +83,9 @@ static void real_add( nav_map_type &navmap, const int master_index,
 
 
 // front end for add a marker beacon
-static void tile_add( nav_map_type &navmap, FGNavRecord *n ) {
-    double diff;
+static void tile_add( nav_map_type &navmap, FGNavRecord *n )
+{
+    double diff = 0;
 
     double lon = n->get_lon();
     double lat = n->get_lat();
@@ -72,7 +93,7 @@ static void tile_add( nav_map_type &navmap, FGNavRecord *n ) {
     int lonidx = (int)lon;
     diff = lon - (double)lonidx;
     if ( (lon < 0.0) && (fabs(diff) > SG_EPSILON) ) {
-	lonidx -= 1;
+        lonidx -= 1;
     }
     double lonfrac = lon - (double)lonidx;
     lonidx += 180;
@@ -80,7 +101,7 @@ static void tile_add( nav_map_type &navmap, FGNavRecord *n ) {
     int latidx = (int)lat;
     diff = lat - (double)latidx;
     if ( (lat < 0.0) && (fabs(diff) > SG_EPSILON) ) {
-	latidx -= 1;
+        latidx -= 1;
     }
     double latfrac = lat - (double)latidx;
     latidx += 90;
@@ -98,30 +119,30 @@ static void tile_add( nav_map_type &navmap, FGNavRecord *n ) {
     // there are 8 cases since there are 8 adjacent tiles
 
     if ( lonfrac < 0.2 ) {
-	real_add( navmap, master_index - 1000, n );
-	if ( latfrac < 0.2 ) {
-	    real_add( navmap, master_index - 1000 - 1, n );
-	} else if ( latfrac > 0.8 ) {
-	    real_add( navmap, master_index - 1000 + 1, n );
-	}
+        real_add( navmap, master_index - 1000, n );
+        if ( latfrac < 0.2 ) {
+            real_add( navmap, master_index - 1000 - 1, n );
+        } else if ( latfrac > 0.8 ) {
+            real_add( navmap, master_index - 1000 + 1, n );
+        }
     } else if ( lonfrac > 0.8 ) {
-	real_add( navmap, master_index + 1000, n );
-	if ( latfrac < 0.2 ) {
-	    real_add( navmap, master_index + 1000 - 1, n );
-	} else if ( latfrac > 0.8 ) {
-	    real_add( navmap, master_index + 1000 + 1, n );
-	}
+        real_add( navmap, master_index + 1000, n );
+        if ( latfrac < 0.2 ) {
+            real_add( navmap, master_index + 1000 - 1, n );
+        } else if ( latfrac > 0.8 ) {
+            real_add( navmap, master_index + 1000 + 1, n );
+        }
     } else if ( latfrac < 0.2 ) {
-	real_add( navmap, master_index - 1, n );
+        real_add( navmap, master_index - 1, n );
     } else if ( latfrac > 0.8 ) {
-	real_add( navmap, master_index + 1, n );
+        real_add( navmap, master_index + 1, n );
     }
 }
 
 
-
 // add an entry to the lists
-bool FGNavList::add( FGNavRecord *n ) {
+bool FGNavList::add( FGNavRecord *n )
+{
     navaids[n->get_freq()].push_back(n);
     ident_navaids[n->get_ident()].push_back(n);
     tile_add( navaids_by_tile, n );
@@ -129,14 +150,13 @@ bool FGNavList::add( FGNavRecord *n ) {
 }
 
 
-// Query the database for the specified frequency.  It is assumed that
-// there will be multiple stations with matching frequencies so a
-// position must be specified.  Lon and lat are in degrees, elev is in
-// meters.
 FGNavRecord *FGNavList::findByFreq( double freq, double lon, double lat, double elev )
 {
-    nav_list_type stations = navaids[(int)(freq*100.0 + 0.5)];
-    Point3D aircraft = sgGeodToCart( Point3D(lon, lat, elev) );
+    const nav_list_type& stations = navaids[(int)(freq*100.0 + 0.5)];
+
+    SGGeod geod = SGGeod::fromRadM(lon, lat, elev);
+    SGVec3d aircraft = SGVec3d::fromGeod(geod);
+    SG_LOG( SG_INSTR, SG_DEBUG, "findbyFreq " << freq << " size " << stations.size()  );
 
     return findNavFromList( aircraft, stations );
 }
@@ -145,29 +165,96 @@ FGNavRecord *FGNavList::findByFreq( double freq, double lon, double lat, double
 FGNavRecord *FGNavList::findByIdent( const char* ident,
                                const double lon, const double lat )
 {
-    nav_list_type stations = ident_navaids[ident];
-    Point3D aircraft = sgGeodToCart( Point3D(lon, lat, 0.0) );
-
+    const nav_list_type& stations = ident_navaids[ident];
+    SGGeod geod = SGGeod::fromRad(lon, lat);
+    SGVec3d aircraft = SGVec3d::fromGeod(geod);
     return findNavFromList( aircraft, stations );
 }
 
 
+nav_list_type FGNavList::findFirstByIdent( const string& ident, fg_nav_types type, bool exact)
+{
+    nav_list_type n2;
+    n2.clear();
+
+    int iType;
+    if(type == FG_NAV_VOR) iType = 3;
+    else if(type == FG_NAV_NDB) iType = 2;
+    else return(n2);
+
+    nav_ident_map_iterator it;
+    if(exact) {
+        it = ident_navaids.find(ident);
+    } else {
+        bool typeMatch = false;
+        int safety_count = 0;
+        it = ident_navaids.lower_bound(ident);
+        while(!typeMatch) {
+            nav_list_type n0 = it->second;
+            // local copy, so we should be able to do anything with n0.
+            // Remove the types that don't match request.
+            for(nav_list_iterator it0 = n0.begin(); it0 != n0.end();) {
+                FGNavRecord* nv = *it0;
+                if(nv->get_type() == iType) {
+                    typeMatch = true;
+                    ++it0;
+                } else {
+                    it0 = n0.erase(it0);
+                }
+            }
+            if(typeMatch) {
+                return(n0);
+            }
+            if(it == ident_navaids.begin()) {
+                // We didn't find a match before reaching the beginning of the map
+                n0.clear();
+                return(n0);
+            }
+            safety_count++;
+            if(safety_count == 1000000) {
+                SG_LOG(SG_INSTR, SG_ALERT,
+                       "safety_count triggered exit from while loop in findFirstByIdent!");
+                break;
+            }
+            ++it;
+            if(it == ident_navaids.end()) {
+                n0.clear();
+                return(n0);
+            }
+        }
+    }
+    if(it == ident_navaids.end()) {
+        n2.clear();
+        return(n2);
+    } else {
+        nav_list_type n1 = it->second;
+        n2.clear();
+        for(nav_list_iterator it2 = n1.begin(); it2 != n1.end(); ++it2) {
+            FGNavRecord* nv = *it2;
+            if(nv->get_type() == iType) n2.push_back(nv);
+        }
+        return(n2);
+    }
+}
+
+
 // Given an Ident and optional freqency, return the first matching
 // station.
 FGNavRecord *FGNavList::findByIdentAndFreq( const char* ident, const double freq )
 {
     nav_list_type stations = ident_navaids[ident];
-
+    SG_LOG( SG_INSTR, SG_DEBUG, "findByIdent " << ident<< " size " << stations.size()  );
     if ( freq > 0.0 ) {
         // sometimes there can be duplicated idents.  If a freq is
         // specified, use it to refine the search.
         int f = (int)(freq*100.0 + 0.5);
-        for ( unsigned int i = 0; i < stations.size(); ++i ) {
-            if ( f == stations[i]->get_freq() ) {
-                return stations[i];
+        nav_list_const_iterator it, end = stations.end();
+        for ( it = stations.begin(); it != end; ++it ) {
+            if ( f == (*it)->get_freq() ) {
+                return (*it);
             }
         }
-    } else {
+    } else if (!stations.empty()) {
         return stations[0];
     }
 
@@ -177,26 +264,24 @@ FGNavRecord *FGNavList::findByIdentAndFreq( const char* ident, const double freq
 
 // Given a point and a list of stations, return the closest one to the
 // specified point.
-FGNavRecord *FGNavList::findNavFromList( const Point3D &aircraft, 
+FGNavRecord *FGNavList::findNavFromList( const SGVec3d &aircraft,
                                          const nav_list_type &stations )
 {
     FGNavRecord *nav = NULL;
-    Point3D station;
     double d2;                  // in meters squared
     double min_dist
         = FG_NAV_MAX_RANGE*SG_NM_TO_METER*FG_NAV_MAX_RANGE*SG_NM_TO_METER;
 
+    nav_list_const_iterator it;
+    nav_list_const_iterator end = stations.end();
     // find the closest station within a sensible range (FG_NAV_MAX_RANGE)
-    for ( unsigned int i = 0; i < stations.size(); ++i ) {
-	// cout << "testing " << current->get_ident() << endl;
-	station = Point3D( stations[i]->get_x(),
-                           stations[i]->get_y(),
-                           stations[i]->get_z() );
-
-	d2 = aircraft.distance3Dsquared( station );
+    for ( it = stations.begin(); it != end; ++it ) {
+        FGNavRecord *station = *it;
+        // cout << "testing " << current->get_ident() << endl;
+        d2 = distSqr(station->get_cart(), aircraft);
 
-	// cout << "  dist = " << sqrt(d)
-	//      << "  range = " << current->get_range() * SG_NM_TO_METER
+        // cout << "  dist = " << sqrt(d)
+        //      << "  range = " << current->get_range() * SG_NM_TO_METER
         //      << endl;
 
         // LOC, ILS, GS, and DME antenna's could potentially be
@@ -209,45 +294,42 @@ FGNavRecord *FGNavList::findNavFromList( const Point3D &aircraft,
         // placed from each other.  (Do the expensive check only for
         // directional atennas and only when there is a chance it is
         // the closest station.)
-	if ( d2 < min_dist &&
-             (stations[i]->get_type() == 4 || stations[i]->get_type() == 5 ||
-              stations[i]->get_type() == 6 || stations[i]->get_type() == 12) )
+        int type = station->get_type();
+        if ( d2 < min_dist &&
+             (type == 4 || type == 5 || type == 6 || type == 12 || type == 13) )
         {
             double hdg_deg = 0.0;
-            if ( stations[i]->get_type() == 4 || stations[i]->get_type() == 5 ){
-                hdg_deg = stations[i]->get_multiuse();
-            } else if ( stations[i]->get_type() == 6 ) {
-                int tmp = (int)(stations[i]->get_multiuse() / 1000.0);
-                hdg_deg = stations[i]->get_multiuse() - (tmp * 1000);
-            } else if ( stations[i]->get_type() == 12 ) {
+            if ( type == 4 || type == 5 ){
+                hdg_deg = station->get_multiuse();
+
+            } else if ( type == 6 ) {
+                int tmp = (int)(station->get_multiuse() / 1000.0);
+                hdg_deg = station->get_multiuse() - (tmp * 1000);
+
+            } else if ( type == 12 || type == 13 ) {
                 // oops, Robin's data format doesn't give us the
                 // needed information to compute a heading for a DME
                 // transmitter.  FIXME Robin!
             }
 
             double az1 = 0.0, az2 = 0.0, s = 0.0;
-            double elev_m = 0.0, lat_rad = 0.0, lon_rad = 0.0;
-            double xyz[3] = { aircraft.x(), aircraft.y(), aircraft.z() };
-            sgCartToGeod( xyz, &lat_rad, &lon_rad, &elev_m );
-            geo_inverse_wgs_84( elev_m,
-                                lat_rad * SG_RADIANS_TO_DEGREES,
-                                lon_rad * SG_RADIANS_TO_DEGREES,
-                                stations[i]->get_lat(), stations[i]->get_lon(),
-                                &az1, &az2, &s);
-            az1 = az1 - stations[i]->get_multiuse();
+            SGGeod geod = SGGeod::fromCart(aircraft);
+            geo_inverse_wgs_84( geod, station->get_pos(), &az1, &az2, &s);
+            az1 = az1 - station->get_multiuse();
             if ( az1 >  180.0) az1 -= 360.0;
             if ( az1 < -180.0) az1 += 360.0;
             // penalize opposite facing stations by adding 5000 meters
             // (squared) which is further than matching stations would
             // ever be placed from each other.
             if ( fabs(az1) > 90.0 ) {
-                d2 += 5000*5000;
+                double dist = sqrt(d2);
+                d2 = (dist + 5000) * (dist + 5000);
             }
         }
 
         if ( d2 < min_dist ) {
             min_dist = d2;
-            nav = stations[i];
+            nav = station;
         }
     }
 
@@ -257,7 +339,7 @@ FGNavRecord *FGNavList::findNavFromList( const Point3D &aircraft,
 
 // returns the closest entry to the give lon/lat/elev
 FGNavRecord *FGNavList::findClosest( double lon_rad, double lat_rad,
-                                     double elev_m )
+                                     double elev_m, fg_nav_types type)
 {
     FGNavRecord *result = NULL;
     double diff;
@@ -267,52 +349,48 @@ FGNavRecord *FGNavList::findClosest( double lon_rad, double lat_rad,
     int lonidx = (int)lon_deg;
     diff = lon_deg - (double)lonidx;
     if ( (lon_deg < 0.0) && (fabs(diff) > SG_EPSILON) ) {
-	lonidx -= 1;
+        lonidx -= 1;
     }
     lonidx += 180;
 
     int latidx = (int)lat_deg;
     diff = lat_deg - (double)latidx;
     if ( (lat_deg < 0.0) && (fabs(diff) > SG_EPSILON) ) {
-	latidx -= 1;
+        latidx -= 1;
     }
     latidx += 90;
 
     int master_index = lonidx * 1000 + latidx;
-    
-    nav_list_type navs = navaids_by_tile[ master_index ];
+
+    const nav_list_type& navs = navaids_by_tile[ master_index ];
     // cout << "Master index = " << master_index << endl;
     // cout << "beacon search length = " << beacons.size() << endl;
 
-    nav_list_iterator current = navs.begin();
-    nav_list_iterator last = navs.end();
+    nav_list_const_iterator current = navs.begin();
+    nav_list_const_iterator last = navs.end();
 
-    Point3D aircraft = sgGeodToCart( Point3D(lon_rad,
-                                             lat_rad,
-                                             elev_m) );
+    SGGeod geod = SGGeod::fromRadM(lon_rad, lat_rad, elev_m);
+    SGVec3d aircraft = SGVec3d::fromGeod(geod);
 
     double min_dist = 999999999.0;
 
     for ( ; current != last ; ++current ) {
-	// cout << "  testing " << (*current)->get_ident() << endl;
-	Point3D station = Point3D( (*current)->get_x(),
-				   (*current)->get_y(),
-				   (*current)->get_z() );
-	// cout << "    aircraft = " << aircraft << " station = " << station 
-	//      << endl;
-
-	double d = aircraft.distance3Dsquared( station ); // meters^2
-	// cout << "  distance = " << d << " (" 
-	//      << FG_ILS_DEFAULT_RANGE * SG_NM_TO_METER 
-	//         * FG_ILS_DEFAULT_RANGE * SG_NM_TO_METER
-	//      << ")" << endl;
-
-	// cout << "  range = " << sqrt(d) << endl;
-
-	if ( d < min_dist ) {
-	    min_dist = d;
-            result = (*current);
-	}
+        if(isTypeMatch(*current, type)) {
+            // cout << "  testing " << (*current)->get_ident() << endl;
+
+            double d = distSqr((*current)->get_cart(), aircraft);
+            // cout << "  distance = " << d << " ("
+            //      << FG_ILS_DEFAULT_RANGE * SG_NM_TO_METER
+            //         * FG_ILS_DEFAULT_RANGE * SG_NM_TO_METER
+            //      << ")" << endl;
+
+            // cout << "  range = " << sqrt(d) << endl;
+
+            if ( d < min_dist ) {
+                min_dist = d;
+                result = (*current);
+            }
+        }
     }
 
     // cout << "lon = " << lon << " lat = " << lat
@@ -320,3 +398,58 @@ FGNavRecord *FGNavList::findClosest( double lon_rad, double lat_rad,
 
     return result;
 }
+
+// Given a frequency, return the first matching station.
+FGNavRecord *FGNavList::findStationByFreq( double freq )
+{
+    const nav_list_type& stations = navaids[(int)(freq*100.0 + 0.5)];
+
+    SG_LOG( SG_INSTR, SG_DEBUG, "findStationByFreq " << freq << " size " << stations.size()  );
+
+    if (!stations.empty()) {
+        return stations[0];
+    }
+    return NULL;
+}
+
+
+
+// FGTACANList ----------------------------------------------------------------
+
+FGTACANList::FGTACANList( void )
+{
+}
+
+
+FGTACANList::~FGTACANList( void )
+{
+}
+
+
+bool FGTACANList::init()
+{
+    return true;
+}
+
+
+// add an entry to the lists
+bool FGTACANList::add( FGTACANRecord *c )
+{
+    ident_channels[c->get_channel()].push_back(c);
+    return true;
+}
+
+
+// Given a TACAN Channel return the first matching frequency
+FGTACANRecord *FGTACANList::findByChannel( const string& channel )
+{
+    const tacan_list_type& stations = ident_channels[channel];
+    SG_LOG( SG_INSTR, SG_DEBUG, "findByChannel " << channel<< " size " << stations.size() );
+
+    if (!stations.empty()) {
+        return stations[0];
+    }
+    return NULL;
+}
+
+