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Trigger lazy loading of Airport data from the scenery on access.

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This commit is contained in:
jmt 2009-08-29 18:00:14 +00:00 committed by Tim Moore
parent b1e2b7ee20
commit 7ff374ef8b
2 changed files with 40 additions and 12 deletions
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38
src/Airports/simple.cxx
View file

@ -58,7 +58,8 @@ FGAirport::FGAirport(const string &id, const SGGeod& location, const SGGeod& tow
_name(name),
_has_metar(has_metar),
_dynamics(0),
mLoadedXML(false)
mRunwaysLoaded(false),
mTaxiwaysLoaded(true)
{
}
@ -104,11 +105,14 @@ FGAirportDynamics * FGAirport::getDynamics()
unsigned int FGAirport::numRunways() const
{
loadRunways();
return mRunways.size();
}
FGRunway* FGAirport::getRunwayByIndex(unsigned int aIndex) const
{
loadRunways();
assert(aIndex >= 0 && aIndex < mRunways.size());
return mRunways[aIndex];
}
@ -132,6 +136,8 @@ FGRunway* FGAirport::getRunwayByIdent(const string& aIdent) const
FGAirport::Runway_iterator
FGAirport::getIteratorForRunwayIdent(const string& aIdent) const
{
loadRunways();
string ident(aIdent);
if ((aIdent.size() == 1) || !isdigit(aIdent[1])) {
ident = "0" + aIdent;
@ -149,6 +155,8 @@ FGAirport::getIteratorForRunwayIdent(const string& aIdent) const
FGRunway* FGAirport::findBestRunwayForHeading(double aHeading) const
{
loadRunways();
Runway_iterator it = mRunways.begin();
FGRunway* result = NULL;
double currentBestQuality = 0.0;
@ -178,6 +186,8 @@ FGRunway* FGAirport::findBestRunwayForHeading(double aHeading) const
bool FGAirport::hasHardRunwayOfLengthFt(double aLengthFt) const
{
loadRunways();
unsigned int numRunways(mRunways.size());
for (unsigned int r=0; r<numRunways; ++r) {
FGRunway* rwy = mRunways[r];
@ -195,22 +205,26 @@ bool FGAirport::hasHardRunwayOfLengthFt(double aLengthFt) const
unsigned int FGAirport::numTaxiways() const
{
loadTaxiways();
return mTaxiways.size();
}
FGTaxiway* FGAirport::getTaxiwayByIndex(unsigned int aIndex) const
{
loadTaxiways();
assert(aIndex >= 0 && aIndex < mTaxiways.size());
return mTaxiways[aIndex];
}
unsigned int FGAirport::numPavements() const
{
loadTaxiways();
return mPavements.size();
}
FGPavement* FGAirport::getPavementByIndex(unsigned int aIndex) const
{
loadTaxiways();
assert(aIndex >= 0 && aIndex < mPavements.size());
return mPavements[aIndex];
}
@ -312,14 +326,28 @@ const FGAirport *fgFindAirportID( const string& id)
return FGAirport::findByIdent(id);
}
void FGAirport::loadRunways() const
{
if (mRunwaysLoaded) {
return; // already loaded, great
}
mRunwaysLoaded = true;
loadSceneryDefintions();
}
void FGAirport::loadTaxiways() const
{
if (mTaxiwaysLoaded) {
return; // already loaded, great
}
}
void FGAirport::loadSceneryDefintions() const
{
mLoadedXML = true;
// 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") == false) {
if (!fgGetBool("/sim/use-scenery-airport-data")) {
return;
}
@ -369,7 +397,7 @@ void FGAirport::processThreshold(SGPropertyNode* aThreshold)
void FGAirport::readTowerData(SGPropertyNode* aRoot)
{
SGPropertyNode* twrNode = aRoot->getChild("twr");
SGPropertyNode* twrNode = aRoot->getChild("tower")->getChild("twr");
double lat = twrNode->getDoubleValue("lat"),
lon = twrNode->getDoubleValue("lon"),
elevM = twrNode->getDoubleValue("elev-m");

10
src/Airports/simple.hxx
View file

@ -193,11 +193,11 @@ private:
bool _has_metar;
FGAirportDynamics *_dynamics;
/**
* This flag indicates if we have attempted to load data from the scenery
* storage to supplement the Apt.Dat information.
*/
mutable bool mLoadedXML;
void loadRunways() const;
void loadTaxiways() const;
mutable bool mRunwaysLoaded;
mutable bool mTaxiwaysLoaded;
std::vector<FGRunwayPtr> mRunways;
std::vector<FGTaxiwayPtr> mTaxiways;