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Swith to the terrain presampling code for a more stable ground elevation if it is enabled.

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This commit is contained in:
Erik Hofman 2020-11-18 12:33:43 +01:00
parent b3e4c25358
commit 108f2d4328
1 changed files with 11 additions and 3 deletions
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14
src/Environment/climate.cxx
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@ -70,7 +70,8 @@ void FGClimate::init()
_positionLatitudeNode = fgGetNode("/position/latitude-deg", true);
_positionLongitudeNode= fgGetNode("/position/longitude-deg", true);
_ground_elev_node = fgGetNode("/position/ground-elev-ft", true );
_ground_elev_node = fgGetNode("/environment/terrain/area[0]/enabled", true);
}
void FGClimate::bind()
@ -206,8 +207,15 @@ void FGClimate::update(double dt)
_rootNode->getNode("description")->setStringValue(_description[_code]);
_rootNode->getNode("classification")->setStringValue(_classification[_code]);
double alt_km;
alt_km = _ground_elev_node->getDoubleValue()*SG_FEET_TO_METER/1000.0;
double alt_ft;
if (_ground_elev_node->getBoolValue() &&
fgGetBool("/environment/terrain/area[0]/output/valid"))
{
alt_ft = fgGetDouble("/environment/terrain/area[0]/output/alt-median-ft");
} else {
alt_ft = fgGetDouble("/position/ground-elev-ft");
}
double alt_km = alt_ft*SG_FEET_TO_METER/1000.0;
// Relative humidity decreases with an average of 4% per kilometer
_relative_humidity_sl = std::min(_relative_humidity_gl + 4.0*alt_km, 100.0);