#include "navradio.hxx"
#include <sstream>
+#include <cstring>
#include <simgear/sg_inlines.h>
#include <simgear/timing/sg_time.hxx>
-#include <simgear/math/vector.hxx>
#include <simgear/math/sg_random.h>
#include <simgear/misc/sg_path.hxx>
#include <simgear/math/sg_geodesy.hxx>
#include <simgear/structure/exception.hxx>
#include <simgear/math/interpolater.hxx>
+#include <simgear/misc/strutils.hxx>
#include <Navaids/navrecord.hxx>
// Constructor
FGNavRadio::FGNavRadio(SGPropertyNode *node) :
+ term_tbl(NULL),
+ low_tbl(NULL),
+ high_tbl(NULL),
lon_node(fgGetNode("/position/longitude-deg", true)),
lat_node(fgGetNode("/position/latitude-deg", true)),
alt_node(fgGetNode("/position/altitude-ft", true)),
+ _operable(false),
play_count(0),
last_time(0),
target_radial(0.0),
+ effective_range(0.0),
+ target_gs(0.0),
+ twist(0.0),
horiz_vel(0.0),
last_x(0.0),
- last_loc_dist(0.0),
last_xtrack_error(0.0),
xrate_ms(0.0),
_localizerWidth(5.0),
_name(node->getStringValue("name", "nav")),
_num(node->getIntValue("number", 0)),
_time_before_search_sec(-1.0),
+ _gsCart(SGVec3d::zeros()),
+ _gsAxis(SGVec3d::zeros()),
+ _gsVertical(SGVec3d::zeros()),
+ _dmeInRange(false),
+ _toFlag(false),
+ _fromFlag(false),
+ _cdiDeflection(0.0),
+ _cdiCrossTrackErrorM(0.0),
+ _gsNeedleDeflection(0.0),
+ _gsNeedleDeflectionNorm(0.0),
_sgr(NULL)
{
SGPath path( globals->get_fg_root() );
term_tbl = new SGInterpTable( term.str() );
low_tbl = new SGInterpTable( low.str() );
high_tbl = new SGInterpTable( high.str() );
-
-
+
string branch("/instrumentation/" + _name);
_radio_node = fgGetNode(branch.c_str(), _num, true);
}
// 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;
&& nav_serviceable_node->getBoolValue() )
{
_operable = true;
- if (nav_slaved_to_gps_node->getBoolValue()) {
- updateGPSSlaved();
- } else {
- updateReceiver(dt);
- }
-
+ updateReceiver(dt);
updateCDI(dt);
} else {
clearOutputs();
void FGNavRadio::clearOutputs()
{
inrange_node->setBoolValue( false );
+ signal_quality_norm_node->setDoubleValue( 0.0 );
cdi_deflection_node->setDoubleValue( 0.0 );
cdi_deflection_norm_node->setDoubleValue( 0.0 );
cdi_xtrack_error_node->setDoubleValue( 0.0 );
cdi_xtrack_hdg_err_node->setDoubleValue( 0.0 );
time_to_intercept->setDoubleValue( 0.0 );
+ heading_node->setDoubleValue(0.0);
gs_deflection_node->setDoubleValue( 0.0 );
gs_deflection_deg_node->setDoubleValue(0.0);
gs_deflection_norm_node->setDoubleValue(0.0);
to_flag_node->setBoolValue( false );
from_flag_node->setBoolValue( false );
+ is_valid_node->setBoolValue(false);
+ nav_id_node->setStringValue("");
_dmeInRange = false;
_operable = false;
+ _navaid = NULL;
}
void FGNavRadio::updateReceiver(double dt)
{
+ SGGeod pos = SGGeod::fromDegFt(lon_node->getDoubleValue(),
+ lat_node->getDoubleValue(),
+ alt_node->getDoubleValue());
+ SGVec3d aircraft = SGVec3d::fromGeod(pos);
+ double loc_dist = 0;
+
// Do a nav station search only once a second to reduce
// unnecessary work. (Also, make sure to do this before caching
// any values!)
search();
}
+ if (_navaid)
+ {
+ loc_dist = dist(aircraft, _navaid->cart());
+ loc_dist_node->setDoubleValue( loc_dist );
+ }
+ updateDME(aircraft);
+
+ if (nav_slaved_to_gps_node->getBoolValue()) {
+ // when slaved to GPS: only allow stuff above: tune NAV station
+ // upate DME. All other data driven by GPS only.
+ updateGPSSlaved();
+ return;
+ }
+
if (!_navaid) {
_cdiDeflection = 0.0;
_cdiCrossTrackErrorM = 0.0;
_toFlag = _fromFlag = false;
_gsNeedleDeflection = 0.0;
_gsNeedleDeflectionNorm = 0.0;
+ heading_node->setDoubleValue(0.0);
inrange_node->setBoolValue(false);
return;
}
- SGGeod pos = SGGeod::fromDegFt(lon_node->getDoubleValue(),
- lat_node->getDoubleValue(),
- alt_node->getDoubleValue());
-
double nav_elev = _navaid->get_elev_ft();
- SGVec3d aircraft = SGVec3d::fromGeod(pos);
- double loc_dist = dist(aircraft, _navaid->cart());
- loc_dist_node->setDoubleValue( loc_dist );
+
bool is_loc = loc_node->getBoolValue();
double signal_quality_norm = signal_quality_norm_node->getDoubleValue();
_cdiCrossTrackErrorM = loc_dist * sin(r * SGD_DEGREES_TO_RADIANS);
updateGlideSlope(dt, aircraft, signal_quality_norm);
- updateDME(aircraft);
-
- last_loc_dist = loc_dist;
}
void FGNavRadio::updateGlideSlope(double dt, const SGVec3d& aircraft, double signal_quality_norm)
}
} else if (prop == nav_slaved_to_gps_node) {
if (prop->getBoolValue()) {
- // slaved-to-GPS activated, sync up selected course
+ // slaved-to-GPS activated, clear obsolete NAV outputs and sync up selected course
+ clearOutputs();
sel_radial_node->setDoubleValue(gps_course_node->getDoubleValue());
}
+ // slave-to-GPS enabled/disabled, resync NAV station (update all outputs)
+ _navaid = NULL;
+ _time_before_search_sec = 0;
}
}
_cdiDeflection = 0.0;
_cdiCrossTrackErrorM = 0.0;
_gsNeedleDeflection = 0.0;
+ _gsNeedleDeflectionNorm = 0.0;
return;
}
}
_navaid = nav;
- char identBuffer[5] = " ";
+ string identBuffer(4, ' ');
if (nav) {
_dme = globals->get_dmelist()->findByFreq(freq, pos);
nav_id_node->setStringValue(nav->get_ident());
- strncpy(identBuffer, nav->ident().c_str(), 5);
+ identBuffer = simgear::strutils::rpad( nav->ident(), 4, ' ' );
effective_range = adjustNavRange(nav->get_elev_ft(), pos.getElevationM(), nav->get_range());
loc_node->setBoolValue(nav->type() != FGPositioned::VOR);
} 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)) {
projects / flightgear.git / blobdiff