On Wed, 25 Feb 2004 22:55:50 +0100 Erik Hofman wrote:
It should also be working with the latest version of FlightGear.
And if they patched FlightGear to support their software they *must* send you the source at your request (GPL compatibility).
How interesting... I was just about to ask about this kind of thing. First of all, congrats to Curt and to the mother for the baby. And now to my question.
If I write a ".h" file that re-defines the NetFDM structure, so that a C program can interact with fgfs via the native FDM protocol, will the file be considered as part of FlightGear and consequently inherit the GPL (and the whole C program along with it) ? Or is it only considered as some sort of data definition only ?
The header files for native.hxx and native_ctrl.hxx have been modified and don't fall under the GPL, just for this purpose. There have been problems with GPL'ed headers for other projects.
Actually, we might be considering the use of FlightGear as a simple visual system on some of the simulators we have at work (we use other systems I once told you about, APOGEE by SOGITEC), but of course the code of our simulators can't be GPL... It will most probably never be redistributed anyway, so nobody would have noticed, but I just wanted to know exactly how much legal interaction actually takes place, so that I can give accurate information about this to other people here which would ask that sort of question.
By the way, my colleagues were surprised that with only a couple of days' work (most of that time spent studying the NetFDM code), it "just worked"... Of course, it needs some tweaking, but position and orientation were correctly displayed, which was already impressive if we compare that to some of the very burdensome protocols we sometimes have to deal with...
Well, you have to provide the source code at the request of the user. If there aren't any users, you wouldn't have to provide the source :-)
Erik
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