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Of all the ILS stations that match the specified frequency and are in range,

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return the one that is pointed most directly at us.
This commit is contained in:
curt 2002-04-15 17:53:05 +00:00
parent 6c2039c5aa
commit 39cba9139c
1 changed files with 8 additions and 7 deletions

15
src/Navaids/ilslist.cxx
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@ -130,6 +130,9 @@ bool FGILSList::query( double lon, double lat, double elev, double freq,
ils_list_iterator current = stations.begin(); ils_list_iterator current = stations.begin();
ils_list_iterator last = stations.end(); ils_list_iterator last = stations.end();
double best_angle = 362.0;
bool found_one = false;
// double az1, az2, s; // double az1, az2, s;
Point3D aircraft = sgGeodToCart( Point3D(lon, lat, elev) ); Point3D aircraft = sgGeodToCart( Point3D(lon, lat, elev) );
Point3D station; Point3D station;
@ -155,9 +158,8 @@ bool FGILSList::query( double lon, double lat, double elev, double freq,
if ( d < (2* FG_ILS_DEFAULT_RANGE * SG_NM_TO_METER if ( d < (2* FG_ILS_DEFAULT_RANGE * SG_NM_TO_METER
* 2 * FG_ILS_DEFAULT_RANGE * SG_NM_TO_METER) ) { * 2 * FG_ILS_DEFAULT_RANGE * SG_NM_TO_METER) ) {
*ils = *current; found_one = true;
return true;
#if 0
// Get our bearing from this station. // Get our bearing from this station.
double reciprocal_bearing, dummy; double reciprocal_bearing, dummy;
double a_lat_deg = lat * SGD_RADIANS_TO_DEGREES; double a_lat_deg = lat * SGD_RADIANS_TO_DEGREES;
@ -174,13 +176,12 @@ bool FGILSList::query( double lon, double lat, double elev, double freq,
current->get_loclon(), a_lat_deg, a_lon_deg, current->get_loclon(), a_lat_deg, a_lon_deg,
&reciprocal_bearing, &dummy, &dummy ); &reciprocal_bearing, &dummy, &dummy );
angle_to_beam_deg = fabs(reciprocal_bearing - s_ils_deg); angle_to_beam_deg = fabs(reciprocal_bearing - s_ils_deg);
if ( angle_to_beam_deg < 90.0 ) { if ( angle_to_beam_deg <= best_angle ) {
*ils = *current; *ils = *current;
return true; best_angle = angle_to_beam_deg;
} }
#endif
} }
} }
return false; return found_one;
} }