# include <config.h>
#endif
-#include "navradio.hxx"
-
#include <sstream>
#include <cstring>
+#include <cstdio>
#include <simgear/sg_inlines.h>
#include <simgear/timing/sg_time.hxx>
#include <simgear/structure/exception.hxx>
#include <simgear/math/interpolater.hxx>
#include <simgear/misc/strutils.hxx>
+#include <simgear/sound/sample_group.hxx>
#include <Navaids/navrecord.hxx>
#include <Sound/audioident.hxx>
#include <Navaids/navlist.hxx>
#include <Main/util.hxx>
+#include "navradio.hxx"
+
using std::string;
// General-purpose sawtooth function. Graph looks like this:
return n;
}
+static std::auto_ptr<SGInterpTable> static_terminalRangeInterp,
+ static_lowRangeInterp, static_highRangeInterp;
+
// Constructor
FGNavRadio::FGNavRadio(SGPropertyNode *node) :
- term_tbl(NULL),
- low_tbl(NULL),
- high_tbl(NULL),
_operable(false),
play_count(0),
- last_time(0),
+ _nav_search(true),
+ _last_freq(0.0),
target_radial(0.0),
effective_range(0.0),
target_gs(0.0),
_gsNeedleDeflectionNorm(0.0),
_audioIdent(NULL)
{
- SGPath path( globals->get_fg_root() );
- SGPath term = path;
- term.append( "Navaids/range.term" );
- SGPath low = path;
- low.append( "Navaids/range.low" );
- SGPath high = path;
- high.append( "Navaids/range.high" );
-
- term_tbl = new SGInterpTable( term.str() );
- low_tbl = new SGInterpTable( low.str() );
- high_tbl = new SGInterpTable( high.str() );
-
+ if (!static_terminalRangeInterp.get()) {
+ // one-time interpolator init
+ SGPath path( globals->get_fg_root() );
+ SGPath term = path;
+ term.append( "Navaids/range.term" );
+ SGPath low = path;
+ low.append( "Navaids/range.low" );
+ SGPath high = path;
+ high.append( "Navaids/range.high" );
+
+ static_terminalRangeInterp.reset(new SGInterpTable(term.str()));
+ static_lowRangeInterp.reset(new SGInterpTable(low.str()));
+ static_highRangeInterp.reset(new SGInterpTable(high.str()));
+ }
+
string branch("/instrumentation/" + _name);
_radio_node = fgGetNode(branch.c_str(), _num, true);
}
nav_slaved_to_gps_node->removeChangeListener(this);
}
- delete term_tbl;
- delete low_tbl;
- delete high_tbl;
-
delete _audioIdent;
}
{
SGPropertyNode* node = _radio_node.get();
bus_power_node =
- fgGetNode(("/systems/electrical/outputs/" + _name).c_str(), true);
+ fgGetNode(("/systems/electrical/outputs/" + _name).c_str(), true);
// inputs
is_valid_node = node->getChild("data-is-valid", 0, true);
alt_freq_node = subnode->getChild("standby-mhz", 0, true);
fmt_freq_node = subnode->getChild("selected-mhz-fmt", 0, true);
fmt_alt_freq_node = subnode->getChild("standby-mhz-fmt", 0, true);
+ is_loc_freq_node = subnode->getChild("is-localizer-frequency", 0, true );
// radials
subnode = node->getChild("radials", 0, true);
node->getNode( "dme-in-range", true )->alias( fgGetNode("/instrumentation/dme[0]/in-range", true ) );
}
+void
+FGNavRadio::reinit ()
+{
+ _time_before_search_sec = -1.0;
+}
+
void
FGNavRadio::bind ()
{
// << " station elev = " << stationElev << endl;
if ( nominalRange < 25.0 + SG_EPSILON ) {
- // Standard Terminal Service Volume
- return term_tbl->interpolate( alt ) * usability_factor;
+ // Standard Terminal Service Volume
+ return static_terminalRangeInterp->interpolate( alt ) * usability_factor;
} else if ( nominalRange < 50.0 + SG_EPSILON ) {
// Standard Low Altitude Service Volume
// table is based on range of 40, scale to actual range
- return low_tbl->interpolate( alt ) * nominalRange / 40.0
+ return static_lowRangeInterp->interpolate( alt ) * nominalRange / 40.0
* usability_factor;
} else {
// Standard High Altitude Service Volume
// table is based on range of 130, scale to actual range
- return high_tbl->interpolate( alt ) * nominalRange / 130.0
+ return static_highRangeInterp->interpolate( alt ) * nominalRange / 130.0
* usability_factor;
}
}
return FG_LOC_DEFAULT_RANGE;
}
+// Frequencies with odd 100kHz numbers in the range from 108.00 - 111.95
+// are LOC/GS (ILS) frequency pairs
+// (108.00, 108.05, 108.20, 108.25.. =VOR)
+// (108.10, 108.15, 108.30, 108.35.. =ILS)
+static inline bool IsLocalizerFrequency( double f )
+{
+ if( f < 108.0 || f >= 112.00 ) return false;
+ return (((SGMiscd::roundToInt(f * 100.0) % 100)/10) % 2) != 0;
+}
+
//////////////////////////////////////////////////////////////////////////
// Update the various nav values based on position and valid tuned in navs
fmt_freq_node->setStringValue(tmp);
sprintf( tmp, "%.2f", alt_freq_node->getDoubleValue() );
fmt_alt_freq_node->setStringValue(tmp);
+ is_loc_freq_node->setBoolValue( IsLocalizerFrequency( freq_node->getDoubleValue() ));
if (power_btn_node->getBoolValue()
&& (bus_power_node->getDoubleValue() > 1.0)
heading_node->setDoubleValue(0.0);
inrange_node->setBoolValue(false);
signal_quality_norm_node->setDoubleValue(0.0);
+ gs_dist_node->setDoubleValue( 0.0 );
+ gs_inrange_node->setBoolValue(false);
return;
}
} // of false courses disabled
const double VOR_FULL_ARC = 20.0; // VOR is -10 .. 10 degree swing
- _cdiDeflection *= VOR_FULL_ARC / _localizerWidth; // increased localiser sensitivity
+ _cdiDeflection *= VOR_FULL_ARC / _localizerWidth; // increased localizer sensitivity
if (backcourse_node->getBoolValue()) {
_cdiDeflection = -_cdiDeflection;
r = ( r<0.0 ? -r-180.0 : -r+180.0 );
}
_cdiDeflection = r;
- } // of non-localiser case
+ } // of non-localizer case
SG_CLAMP_RANGE(_cdiDeflection, -10.0, 10.0 );
_cdiDeflection *= signal_quality_norm;
- // cross-track error (in metres)
+ // cross-track error (in meters)
_cdiCrossTrackErrorM = loc_dist * sin(r * SGD_DEGREES_TO_RADIANS);
updateGlideSlope(dt, aircraft, signal_quality_norm);
void FGNavRadio::updateGlideSlope(double dt, const SGVec3d& aircraft, double signal_quality_norm)
{
- _gsNeedleDeflection = 0.0;
- if (!_gs || !inrange_node->getBoolValue()) {
- gs_dist_node->setDoubleValue( 0.0 );
- gs_inrange_node->setBoolValue(false);
+ bool gsInRange = (_gs && inrange_node->getBoolValue());
+ double gsDist = 0;
+
+ if (gsInRange)
+ {
+ gsDist = dist(aircraft, _gsCart);
+ gsInRange = (gsDist < (_gs->get_range() * SG_NM_TO_METER));
+ }
+
+ gs_inrange_node->setBoolValue(gsInRange);
+ gs_dist_node->setDoubleValue( gsDist );
+
+ if (!gsInRange)
+ {
_gsNeedleDeflection = 0.0;
_gsNeedleDeflectionNorm = 0.0;
return;
}
- double gsDist = dist(aircraft, _gsCart);
- gs_dist_node->setDoubleValue(gsDist);
- bool gsInRange = (gsDist < (_gs->get_range() * SG_NM_TO_METER));
- gs_inrange_node->setBoolValue(gsInRange);
-
- if (!gsInRange) return;
-
SGVec3d pos = aircraft - _gsCart; // relative vector from gs antenna to aircraft
// The positive GS axis points along the runway in the landing direction,
// toward the far end, not toward the approach area, so we need a - sign here:
SG_CLAMP_RANGE( adjustment, -30.0, 30.0 );
// determine the target heading to fly to intercept the
- // tgt_radial = target radial (true) + cdi offset adjustmest -
+ // tgt_radial = target radial (true) + cdi offset adjustment -
// xtrack heading error adjustment
double nta_hdg;
double trtrue = target_radial_true_node->getDoubleValue();
FGNavRecord* FGNavRadio::findPrimaryNavaid(const SGGeod& aPos, double aFreqMHz)
{
- FGNavRecord* nav = globals->get_navlist()->findByFreq(aFreqMHz, aPos);
- if (nav) {
- return nav;
- }
-
- return globals->get_loclist()->findByFreq(aFreqMHz, aPos);
+ return FGNavList::findByFreq(aFreqMHz, aPos, FGNavList::navFilter());
}
-// Update current nav/adf radio stations based on current postition
+// Update current nav/adf radio stations based on current position
void FGNavRadio::search()
{
+ // set delay for next search
_time_before_search_sec = 1.0;
+
double freq = freq_node->getDoubleValue();
-
- FGNavRecord* nav = findPrimaryNavaid(globals->get_aircraft_position(), freq);
- if (nav == _navaid) {
- return; // found the same as last search, we're done
+
+ // immediate NAV search when frequency has changed (toggle between nav and g/s search otherwise)
+ _nav_search |= (_last_freq != freq);
+
+ // do we need to search a new NAV station in this iteration?
+ if (_nav_search)
+ {
+ _last_freq = freq;
+ FGNavRecord* nav = findPrimaryNavaid(globals->get_aircraft_position(), freq);
+ if (nav == _navaid) {
+ if (nav && (nav->type() != FGPositioned::VOR))
+ _nav_search = false; // search glideslope on next iteration
+ return; // nav hasn't changed, we're done
+ }
+ // remember new navaid station
+ _navaid = nav;
}
-
- _navaid = nav;
+
+ // search glideslope station
+ if ((_navaid.valid()) && (_navaid->type() != FGPositioned::VOR))
+ {
+ FGNavList::TypeFilter gsFilter(FGPositioned::GS);
+ FGNavRecord* gs = FGNavList::findByFreq(freq, globals->get_aircraft_position(),
+ &gsFilter);
+ if ((!_nav_search) && (gs == _gs))
+ {
+ _nav_search = true; // search NAV on next iteration
+ return; // g/s hasn't changed, neither has nav - we're done
+ }
+ // remember new glideslope station
+ _gs = gs;
+ }
+
+ _nav_search = true; // search NAV on next iteration
+
+ // nav or gs station has changed
+ updateNav();
+}
+
+// Update current nav/adf/glideslope outputs when station has changed
+void FGNavRadio::updateNav()
+{
+ // update necessary, nav and/or gs has changed
+ FGNavRecord* nav = _navaid;
string identBuffer(4, ' ');
if (nav) {
nav_id_node->setStringValue(nav->get_ident());
if (nav->type() == FGPositioned::VOR) {
target_radial = sel_radial_node->getDoubleValue();
_gs = NULL;
- has_gs_node->setBoolValue(false);
} else { // ILS or LOC
- _gs = globals->get_gslist()->findByFreq(freq, globals->get_aircraft_position());
- has_gs_node->setBoolValue(_gs != NULL);
_localizerWidth = nav->localizerWidth();
twist = 0.0;
- effective_range = nav->get_range();
+ effective_range = nav->get_range();
target_radial = nav->get_multiuse();
SG_NORMALIZE_RANGE(target_radial, 0.0, 360.0);
-
+
if (_gs) {
int tmp = (int)(_gs->get_multiuse() / 1000.0);
target_gs = (double)tmp / 100.0;
_gsAxis = tangentVector(_gs->geod(), gs_radial);
// GS baseline unit tangent vector
- // (transverse to the runay along the ground)
+ // (transverse to the runway along the ground)
_gsBaseline = tangentVector(_gs->geod(), gs_radial + 90.0);
_gsVertical = cross(_gsBaseline, _gsAxis);
} // of have glideslope
_gs = NULL;
nav_id_node->setStringValue("");
loc_node->setBoolValue(false);
- has_gs_node->setBoolValue(false);
_audioIdent->setIdent("", 0.0 );
}
+ has_gs_node->setBoolValue(_gs != NULL);
is_valid_node->setBoolValue(nav != NULL);
id_c1_node->setIntValue( (int)identBuffer[0] );
id_c2_node->setIntValue( (int)identBuffer[1] );
projects / flightgear.git / blobdiff