On Tue, 2010-11-30 at 14:03 +, James Turner wrote:
> On 30 Nov 2010, at 13:14, Flightgear-commitlogs wrote:
> >PAtch by Andreas Gaeb to eliminate NaN's in the location code
>
> Erik, can you talk a little about what this patch fixes? I can read the
> description, and it sounds really great, but it seems very fortunate that a
> patch should appear for the exact problem we're having in FlightGear, at this
> time. Am I hoping for too much, based upon the description?
Form the JSBSim developers list:
>
> recently I've run into some floating point exceptions. Tracing them
> down, I found that FGLocation could produce them. This is due to the
> derived values not being initialized. If the copy constructor or
> operator= are called, they copy over the uninitialized garbage in the
> derived values -- which on my system happens to evaluate to NaN, thus
> causing FPEs.
Coincidentally it was posted the same day someone mentioned the startup
'crash' of the C172p. I was hoping it might solve it but was (and still
am) skeptical it does. Due to the lack of feedback so far I don't know
for certain either.
Erik
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