On lundi 08 décembre 2008, Anders Gidenstam wrote:
> On Mon, 8 Dec 2008, gerard robin wrote:
> > I hope that solve the problem for you.
> > Here i have rebuilt FG with that patch and recovered one of my old JSBSim
> > Aircraft FDM which did not worked,
> > i am longer getting the same error , black screen and
> > CullVisitor::apply(Geode&) detected NaN,
> > depth=nan, center=(-3.09272 -0.110464 -0.924417),
> > matrix={
> > nan nan nan nan
> > nan nan nan nan
> > nan nan nan nan
> > nan nan nan nan
> > }
> >
> > Anyhow, as i told before i have solved it in a different way.
>
> Hi Gerard,
>
> Could you tell which aircraft you see these problems with? There might be
> other problems lurking in the code.
>
> This one wasn't easy to find - my manual CVS bisect search on
> JSBSim/CVS put me on the wrong track (I'm not sure what when wrong there).
> In any case I got the same valgrind complaints for the whole period I
> tested, Aug 1st to now, but NaN problems only from Dec 1st with my test
> case (the Dec 1st commit seems to be a completely unrelated and is not
> even present in FG yet). I finally found the missing initialization by dumb
> luck while checking up on all -Wall warnings in JSBSim (not that many).
> The warning wasn't related to the initialization issue.
>
> Valgrind wasn't very helpful in tracking down the source of the
> uninitialized values this time, what I got was messages like this:
>
> ==11005== Conditional jump or move depends on uninitialised value(s)
> ==11005== at 0x8152E72:
> JSBSim::FGQuaternion::ComputeDerivedUnconditional() const
> (FGQuaternion.cpp:164)
> ==11005== by 0x807BA15: JSBSim::FGAuxiliary::Run() (FGQuaternion.h:461)
> ==11005== by 0x804FD2E: JSBSim::FGFDMExec::Run() (FGFDMExec.cpp:367)
> ==11005== by 0x804E341: main (JSBSim.cpp:360)
>
> with no hint on how the value(s) got there in the first place..
>
> Now JSBSim/CVS runs without any valgrind complaints here on my ZLT-NT
> and Submarine Scout test cases.
> But I just tried the 737_cruise_steady_turn.xml script and got complaints
> again, will try to track them down.
>
> Cheers,
>
> Anders
Unfortunately as i said before , the non working examples, are with JSBSim FDM
aircraft that i am working on. ( old models translated to FG 1.9 )
None of them are in cvs yet.
And i said the problem was not new to me.
I never , before these day, told anything about it, which could have been
coming from me.
Cheers
--
Gérard
http://pagesperso-orange.fr/GRTux/
J'ai décidé d'être heureux parce que c'est bon pour la santé.
Voltaire
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