Steve Hosgood wrote:
Durk is quite right. It's non-trivial, but dealing with all these issues
is not really a problem. I'm in the middle of doing it myself, but have
just only just got back from a week on vacation.
My main interest is in removing the use of Xearth's "find the point on
the planet where the sun is overhead" routine and replacing it with the
more obvious "what is the current altitude and azimuth of the sun seen
from a given location".
Doing that will make all the solar (and lunar) astronomy code use
standard algorithms from Peter Duffett-Smith's books and thus make sure
there can be no problems with Xearth's non-GPL code causing trouble for
FlightGear.
That would be great.
But if you don't mind I'm still working on my own solution, I already
have the code to compensate for lon and daylight saving time.
Let's see what comes out of it ;-)
Erik
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