Cloud layer is vanishing when setting semimajor axis of ellipsoid

[sebastian.vesenmayer]

Hi,

just tried to let the clouds vanish at the horizon. When using the c++ api, only the standard value of 6378.137 km is working correctly for the ellipsoid of the GeodeticPivot.

When I slightly change it the clouds will vanish.

I am using OpenGL and Unigine 2.7.2.1.

m_cloudsGeodetic = Unigine::GeodeticPivot::create();
m_cloudsGeodetic->setOriginBasis(Unigine::GeodeticPivot::ORIGIN_BASIS_LOCAL);
auto ellipsoid = m_cloudsGeodetic->getEllipsoid();
ellipsoid->setMode(Unigine::Ellipsoid::MODE_FAST);

ellipsoid->setSemimajorAxis(6378137.); //coverage normal
//ellipsoid->setSemimajorAxis(6378137.-500.); //coverage gets higly reduced
//ellipsoid->setSemimajorAxis(6378137.+500.); //coverage normal
//ellipsoid->setSemimajorAxis(6378137.+1000.); //no clouds visible anymore

....

m_cloudsGeodetic->addChild(cloudLayer->getNode());

Did I miss something or is it a bug?

Thanks

Sebastian

Edited February 12, 2019 by sebastian.vesenmayer

[andrey-kozlov]

Hello Sebastian,

Ellipsoid for GeodeticPivot has kind of "value based" semantic. Modifying the ellipsoid directly leads the geodetic pivot to inconsistent state.

Add this line:
m_cloudsGeodetic->setEllipsoid(ellipsoid);

It forces a geodetic pivot to update internal state according to the ellipsoid

[sebastian.vesenmayer]

Thank you this works. Can you please update the manual of the  Unigine::GeodeticPivot class and write a notice to the setEllipsoid and getEllipsoid method?

[andrey-kozlov]

I've passed that to the documentation team.