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Ref T268, XPlane testing showed: height has an influence on the returned elevation result

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* the most accurate value seems to be returned if the height is close to the elevation
* in normal scenarios there is no much difference of the results if 0 is used
* in Lukla (9200ft MSL) the difference between 0 and 9200 is around 1ft
* in the LOWW scenario using 50000ft MSL results in around 3ft too low elevation
This commit is contained in:
Klaus Basan
2018-07-19 02:38:59 +02:00
parent 7753fa787a
commit 14faf5136a
1 changed files with 10 additions and 2 deletions
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10
src/plugins/simulator/xplane/simulatorxplane.cpp
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@@ -154,9 +154,17 @@ namespace BlackSimPlugin
if (this->isShuttingDown()) { return false; } if (this->isShuttingDown()) { return false; }
if (reference.isNull()) { return false; } if (reference.isNull()) { return false; }
static const CAltitude alt(50000, CLengthUnit::ft());
CCoordinateGeodetic pos(reference); CCoordinateGeodetic pos(reference);
if (!pos.hasMSLGeodeticHeight())
{
// testing showed: height has an influence on the returned result
// - the most accurate value seems to be returned if the height is close to the elevation
// - in normal scenarios there is no much difference of the results if 0 is used
// - in Lukla (9200ft MSL) the difference between 0 and 9200 is around 1ft
// - in the LOWW scenario using 50000ft MSL results in around 3ft too low elevation
static const CAltitude alt(0, CAltitude::MeanSeaLevel, CLengthUnit::ft());
pos.setGeodeticHeight(alt); pos.setGeodeticHeight(alt);
}
using namespace std::placeholders; using namespace std::placeholders;
auto callback = std::bind(&CSimulatorXPlane::callbackReceivedRequestedElevation, this, _1, _2); auto callback = std::bind(&CSimulatorXPlane::callbackReceivedRequestedElevation, this, _1, _2);