// Destructor
FGNavRadio::~FGNavRadio()
{
- gps_course_node->removeChangeListener(this);
- nav_slaved_to_gps_node->removeChangeListener(this);
-
+ if (gps_course_node) {
+ gps_course_node->removeChangeListener(this);
+ }
+
+ if (nav_slaved_to_gps_node) {
+ nav_slaved_to_gps_node->removeChangeListener(this);
+ }
+
delete term_tbl;
delete low_tbl;
delete high_tbl;
} else { // ILS or LOC
_gs = globals->get_gslist()->findByFreq(freq, pos);
has_gs_node->setBoolValue(_gs != NULL);
- _localizerWidth = localizerWidth(nav);
+ _localizerWidth = nav->localizerWidth();
twist = 0.0;
effective_range = nav->get_range();
id_c4_node->setIntValue( (int)identBuffer[3] );
}
-double FGNavRadio::localizerWidth(FGNavRecord* aLOC)
-{
- FGRunway* rwy = aLOC->runway();
- if (!rwy) {
- return 6.0; // no runway associated, return default value
- }
-
-
- SGVec3d thresholdCart(SGVec3d::fromGeod(rwy->threshold()));
- double axisLength = dist(aLOC->cart(), thresholdCart);
- double landingLength = dist(thresholdCart, SGVec3d::fromGeod(rwy->end()));
-
-// Reference: http://dcaa.slv.dk:8000/icaodocs/
-// ICAO standard width at threshold is 210 m = 689 feet = approx 700 feet.
-// ICAO 3.1.1 half course = DDM = 0.0775
-// ICAO 3.1.3.7.1 Sensitivity 0.00145 DDM/m at threshold
-// implies peg-to-peg of 214 m ... we will stick with 210.
-// ICAO 3.1.3.7.1 "Course sector angle shall not exceed 6 degrees."
-
-// Very short runway: less than 1200 m (4000 ft) landing length:
- if (landingLength < 1200.0) {
-// ICAO fudges localizer sensitivity for very short runways.
-// This produces a non-monotonic sensitivity-versus length relation.
- axisLength += 1050.0;
- }
-
-// Example: very short: San Diego KMYF (Montgomery Field) ILS RWY 28R
-// Example: short: Tom's River KMJX (Robert J. Miller) ILS RWY 6
-// Example: very long: Denver KDEN (Denver) ILS RWY 16R
- double raw_width = 210.0 / axisLength * SGD_RADIANS_TO_DEGREES;
- return raw_width < 6.0? raw_width : 6.0;
-}
-
void FGNavRadio::audioNavidChanged()
{
if (_sgr->exists(nav_fx_name)) {