sun position in openGL SilverLining SDK

I’m recently trying to construct a physically based sky model using the openGL SilverLining SDK.
However, I can’t figure out where to set the sun position in the api, since there’s only function GetSunOrMoonPosition() to retrieve the direction of the dominant directional light source.
Does anyone know how to use it?

This isn’t an really an OpenGL question. Your best bet is to read the documentation (including header comments) in the Silver Lining SDK or (failing that) contact Sundog Software tech support. It’s been a few years since I worked with some of their software, but at the time, Frank was very helpful in answering tech support questions. And while I can’t speak for the Silver Lining SDK, the Triton SDK had decent documentation.