X-Git-Url: https://git.mxchange.org/?a=blobdiff_plain;f=src%2FNavaids%2Fnavrecord.cxx;h=5edc64ef180c2babd21b71e19b06eb617eea3de3;hb=cd20c6073c8f4341d0f82070abae14b765cc8630;hp=6bb71a54c9d2e40e3506b4e17e451b910e80fd94;hpb=2936c45923ce65c0130de582f75835a57e607739;p=flightgear.git diff --git a/src/Navaids/navrecord.cxx b/src/Navaids/navrecord.cxx index 6bb71a54c..5edc64ef1 100644 --- a/src/Navaids/navrecord.cxx +++ b/src/Navaids/navrecord.cxx @@ -32,7 +32,7 @@ #include #include #include -#include + #include #include @@ -41,6 +41,7 @@ #include #include
+#include FGNavRecord::FGNavRecord(Type aTy, const std::string& aIdent, const std::string& aName, const SGGeod& aPos, @@ -82,6 +83,7 @@ FGNavRecord::FGNavRecord(Type aTy, const std::string& aIdent, } } + init(true); // init FGPositioned (now position is adjusted) } void FGNavRecord::initAirportRelation() @@ -91,9 +93,15 @@ 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 @@ -117,36 +125,6 @@ void FGNavRecord::initAirportRelation() } } -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"), @@ -178,6 +156,45 @@ void FGNavRecord::alignLocaliserWithRunway(double aThreshold) } } +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; + +} + +flightgear::PositionedBinding* +FGNavRecord::createBinding(SGPropertyNode* nd) const +{ + return new flightgear::NavaidBinding(this, nd); +} + + FGTACANRecord::FGTACANRecord(void) : channel(""), freq(0)