#include <istream>
#include <simgear/misc/sgstream.hxx>
+#include <simgear/misc/sg_path.hxx>
#include <simgear/structure/exception.hxx>
-#include <simgear/misc/strutils.hxx>
#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 "Airports/simple.hxx"
-#include "Airports/runways.hxx"
-#include "Main/fg_props.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,
const std::string& aName, const SGGeod& aPos,
freq(aFreq),
range(aRange),
multiuse(aMultiuse),
- name(aName),
+ _name(aName),
+ mRunway(NULL),
serviceable(true),
trans_ident(aIdent)
{
}
-SGVec3d FGNavRecord::get_cart() const
-{
- return SGVec3d::fromGeod(geod());
-}
-
-
-static FGPositioned::Type
-mapRobinTypeToFGPType(int aTy)
-{
- switch (aTy) {
- // case 1:
- case 2: return FGPositioned::NDB;
- case 3: return FGPositioned::VOR;
- case 4: return FGPositioned::LOC;
- case 5: return FGPositioned::ILS;
- case 6: return FGPositioned::GS;
- case 7: return FGPositioned::OM;
- case 8: return FGPositioned::MM;
- case 9: return FGPositioned::IM;
- case 12:
- case 13: return FGPositioned::DME;
- case 99: return FGPositioned::INVALID; // end-of-file code
- default:
- throw sg_range_exception("Got a nav.dat type we don't recgonize", "FGNavRecord::createFromStream");
- }
-}
-
-FGNavRecord* FGNavRecord::createFromStream(std::istream& aStream)
-{
- int rawType;
- aStream >> rawType;
- if (aStream.eof()) {
- return NULL; // happens with, eg, carrier_nav.dat
- }
-
- Type type = mapRobinTypeToFGPType(rawType);
- if (type == INVALID) return NULL;
-
- double lat, lon, elev_ft, multiuse;
- int freq, range;
- std::string apt_id, name, ident;
- aStream >> lat >> lon >> elev_ft >> freq >> range >> multiuse >> ident;
- getline(aStream, name);
-
- // silently multiply adf frequencies by 100 so that adf
- // vs. nav/loc frequency lookups can use the same code.
- if (type == NDB) {
- freq *= 100;
- }
-
- FGNavRecord* result = new FGNavRecord(type, ident,
- simgear::strutils::strip(name), SGGeod::fromDegFt(lon, lat, elev_ft),
- freq, range, multiuse);
-
- return result;
-}
-
void FGNavRecord::initAirportRelation()
{
- if (type() < ILS || type() > IM) {
+ if ((type() < ILS) || (type() > GS)) {
return; // not airport-located
}
- vector<string> parts = simgear::strutils::split(name);
- apt_id = parts[0];
- const FGAirport* apt = fgFindAirportID(apt_id);
-
- if (!apt) {
- SG_LOG(SG_GENERAL, SG_WARN, "navaid " << ident() << " associated with bogus airport ID:" << apt_id);
+ mRunway = getRunwayFromName(_name);
+ if (!mRunway) {
return;
}
- // fudge elevation to the field elevation if it's not specified
+ if (type() != GS) {
+ readAirportSceneryData();
+ }
+
+ // fudge elevation to the runway elevation if it's not specified
if (fabs(elevation()) < 0.01) {
- mPosition.setElevationFt(apt->getElevation());
+ mPosition.setElevationFt(mRunway->elevation());
+ }
+
+ if (type() == ILS || type() == LOC) {
+ mRunway->setILS(this);
}
// align localizers with their runway
return;
}
- if (parts.size() < 2) {
- SG_LOG(SG_GENERAL, SG_ALERT, "can't parse navaid " << ident()
- << " name for airport/runway:" << name);
- return;
- }
-
- double threshold
- = fgGetDouble( "/sim/navdb/localizers/auto-align-threshold-deg",
- 5.0 );
- FGRunway* runway = apt->getRunwayByIdent(parts[1]);
- alignLocaliserWithRunway(runway, threshold);
+ double threshold
+ = fgGetDouble( "/sim/navdb/localizers/auto-align-threshold-deg", 5.0 );
+ alignLocaliserWithRunway(threshold);
+ }
+}
+
+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"),
+ lon = aILSNode->getDoubleValue("lon"),
+ lat = aILSNode->getDoubleValue("lat"),
+ elevM = aILSNode->getDoubleValue("elev-m");
+
+ mPosition = SGGeod::fromDegM(lon, lat, elevM);
+ multiuse = hdgDeg;
}
-void FGNavRecord::alignLocaliserWithRunway(FGRunway* aRunway, double aThreshold)
+void FGNavRecord::alignLocaliserWithRunway(double aThreshold)
{
// find the distance from the threshold to the localizer
- SGGeod runwayThreshold(aRunway->threshold());
- double dist, az1, az2;
- SGGeodesy::inverse(mPosition, runwayThreshold, az1, az2, dist);
+ double dist = SGGeodesy::distanceM(mPosition, mRunway->threshold());
// back project that distance along the runway center line
- SGGeod newPos = aRunway->pointOnCenterline(dist);
-
- double hdg_diff = get_multiuse() - aRunway->headingDeg();
+ SGGeod newPos = mRunway->pointOnCenterline(dist);
- // clamp to [-180.0 ... 180.0]
- if ( hdg_diff < -180.0 ) {
- hdg_diff += 360.0;
- } else if ( hdg_diff > 180.0 ) {
- hdg_diff -= 360.0;
- }
+ double hdg_diff = get_multiuse() - mRunway->headingDeg();
+ SG_NORMALIZE_RANGE(hdg_diff, -180.0, 180.0);
if ( fabs(hdg_diff) <= aThreshold ) {
- mPosition = newPos;
- set_multiuse( aRunway->headingDeg() );
+ mPosition = SGGeod::fromGeodFt(newPos, mPosition.getElevationFt());
+ set_multiuse( mRunway->headingDeg() );
} else {
- SG_LOG(SG_GENERAL, SG_WARN, "localizer:" << ident() << ", aligning with runway "
- << aRunway->ident() << " exceeded heading threshold");
+ 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) :
projects / flightgear.git / blobdiff