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Tacan: avoid a 'long-range' wgs84_inverse

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- Only check mobile distance at all, if the mobile is valid
This commit is contained in:
James Turner 2014-02-04 14:54:39 +00:00
parent 34433c1fa1
commit 27c58ddb21
1 changed files with 4 additions and 4 deletions
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8
src/Instrumentation/tacan.cxx
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@ -138,7 +138,7 @@ TACAN::update (double delta_time_sec)
return;
}
SGGeod pos(globals->get_aircraft_position());
SGGeod pos(globals->get_aircraft_position());
// On timeout, scan again
_time_before_search_sec -= delta_time_sec;
if ((_time_before_search_sec < 0 || _new_frequency) && _frequency_mhz >= 0)
@ -150,10 +150,10 @@ TACAN::update (double delta_time_sec)
double mobile_az2 = 0;
double mobile_bearing = 0;
double mobile_distance = 0;
geo_inverse_wgs_84(pos, _mobilePos,
if (_mobile_valid) {
geo_inverse_wgs_84(pos, _mobilePos,
&mobile_bearing, &mobile_az2, &mobile_distance);
}
//calculate the bearing and range of the station from the aircraft
double az2 = 0;