The spot in this code can not be circular.
I plan to model a hot spot evolution in a classical T Tau-type star accreting in stable regime, with "bana-shaped" hot spots near the magnetic poles.
I am unable to help with code, but perhaps you will find information at the following site:
http://adsabs.harvard.edu/full/2000MNRAS.314..489A
You can perhaps use the PHOEBE code, which is actively being developed, also on users requests:
http://sourceforge.net/projects/phoebe/
Many light curve analysis codes have been written, usually in conjunction with eclipsing light curve code, but the spot algorithms used in some of these will work on ellipsoidal and non-eclipsing systems also. Check out the biblios of R. E. Wilson, Lanza & colleagues at Catania, Vogt at Lick, and Mochnacki at Toronto for the techniques and references. Other work is summarized and cited in Kallrath & Milone (2009). Explicitly non-spherical spots were introduced by Graham Hill in his code.
Thank you very much for the answers, I'll detaily check all possibilities. Best regards.
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