#include <simgear/debug/logstream.hxx>
#include <simgear/sg_inlines.h>
#include <simgear/props/props.hxx>
-#include <simgear/props/props_io.hxx>
+
#include <Navaids/navrecord.hxx>
#include <Navaids/navdb.hxx>
#include <Airports/runways.hxx>
#include <Airports/simple.hxx>
#include <Airports/xmlloader.hxx>
-
#include <Main/fg_props.hxx>
FGNavRecord::FGNavRecord(Type aTy, const std::string& aIdent,
multiuse(aMultiuse),
_name(aName),
mRunway(NULL),
- serviceable(true),
- trans_ident(aIdent)
+ serviceable(true)
{
initAirportRelation();
// assign our own defaults, unless the range is not set for some
// reason.
if (range < 0.1) {
- SG_LOG(SG_GENERAL, SG_WARN, "navaid " << ident() << " has no range set, using defaults");
+ SG_LOG(SG_GENERAL, SG_DEBUG, "navaid " << ident() << " has no range set, using defaults");
switch (type()) {
case NDB:
case VOR:
}
}
+ init(true); // init FGPositioned (now position is adjusted)
}
void FGNavRecord::initAirportRelation()
}
mRunway = getRunwayFromName(_name);
+ if (!mRunway) {
+ return;
+ }
if (type() != GS) {
- readAirportSceneryData();
+ SGPropertyNode* ilsData = ilsDataForRunwayAndNavaid(mRunway, ident());
+ if (ilsData) {
+ processSceneryILS(ilsData);
+ }
}
// fudge elevation to the runway elevation if it's not specified
mPosition.setElevationFt(mRunway->elevation());
}
- if (type() == ILS) {
+ if (type() == ILS || type() == LOC) {
mRunway->setILS(this);
}
}
}
-void FGNavRecord::readAirportSceneryData()
-{
- // allow users to disable the scenery data in the short-term
- // longer term, this option can probably disappear
- if (!fgGetBool("/sim/use-scenery-airport-data")) {
- return;
- }
-
- SGPath path;
- SGPropertyNode_ptr rootNode = new SGPropertyNode;
- if (!XMLLoader::findAirportData(mRunway->airport()->ident(), "ils", path)) {
- return;
- }
-
- readProperties(path.str(), rootNode);
- SGPropertyNode* runwayNode, *ilsNode;
- for (int i=0; (runwayNode = rootNode->getChild("runway", i)) != NULL; ++i) {
- for (int j=0; (ilsNode = runwayNode->getChild("ils", j)) != NULL; ++j) {
- // must match on both nav-ident and runway ident, to support the following:
- // - runways with multiple distinct ILS installations (KEWD, for example)
- // - runways where both ends share the same nav ident (LFAT, for example)
- if ((ilsNode->getStringValue("nav-id") == ident()) &&
- (ilsNode->getStringValue("rwy") == mRunway->ident())) {
- processSceneryILS(ilsNode);
- return;
- }
- } // of ILS iteration
- } // of runway iteration
-}
-
void FGNavRecord::processSceneryILS(SGPropertyNode* aILSNode)
{
double hdgDeg = aILSNode->getDoubleValue("hdg-deg"),
mPosition = SGGeod::fromGeodFt(newPos, mPosition.getElevationFt());
set_multiuse( mRunway->headingDeg() );
} else {
- SG_LOG(SG_GENERAL, SG_WARN, "localizer:" << ident() << ", aligning with runway "
+ SG_LOG(SG_GENERAL, SG_DEBUG, "localizer:" << ident() << ", aligning with runway "
<< mRunway->ident() << " exceeded heading threshold");
}
}
+double FGNavRecord::localizerWidth() const
+{
+ if (!mRunway) {
+ return 6.0;
+ }
+
+ SGVec3d thresholdCart(SGVec3d::fromGeod(mRunway->threshold()));
+ double axisLength = dist(cart(), thresholdCart);
+ double landingLength = dist(thresholdCart, SGVec3d::fromGeod(mRunway->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;
+
+}
+
FGTACANRecord::FGTACANRecord(void) :
channel(""),
freq(0)