I am new to Celestia, so I apologise in advance if my questions have been already asked before. I did try to search in the old emails but couldn't find anything related to it. I am numbering my questions to facilitate any reply to them...
1) I would like to know where all the planets' celestial mechanics parameters (e.g. orbits' elements, rotation on their axis, obliquity, etc.) are defined in Celestia (i.e. in which Celestia C++ file).
2) Secondly, I would like to know where is the OpenGL code that uses these parameters to produce the graphical effects.
3) And I would also like to know where is the OpenGL programming code (i.e. in which Celestia C++ file) related to the Sun light effects?
Cheers! Thanks for your help!!
ghis