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
--
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Anders Gidenstam
WWW: http://www.gidenstam.org/FlightGear/
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