chiara modenese said: (by the date of Thu, 26 Aug 2010 16:27:50 +0100)
> On 26 August 2010 13:25, Bruno Chareyre wrote:
>
> > I bet on contact law returning nan value (division by 0, or something like
> > that).
> > Then velocity is NaN when this force is integrated.
> >
> You win the bet,
> Interesting. Also remember that you can advance line by line and inspect
> values with the debugger, with various conditional breakpoints.
> I do that with kdevelop but I guess it can as well be done with other
> gdb frontends or with gdb alone.
Oh yes, of course. This is just much much easier.
In the last commit, I added sub-stepping functinality where you can
advance by a single engine (rather than full iteration at once), that
whould help in such cases. (I keep in mind to show force acting on Body
in the Inspector)
Interesting. Also remember that you can advance line by line an
> You win the bet, sorry. After a day of debugging, I realized I was
> returning a negative tangential stiff, and this was causing the
> problem with contact damping. Thxs for suggestions anyway. I see from
> the mail archive that Janek had some problems with Nan values
> (unrelated to my question
On 26 August 2010 13:25, Bruno Chareyre wrote:
> I bet on contact law returning nan value (division by 0, or something like
> that).
> Then velocity is NaN when this force is integrated.
>
You win the bet, sorry. After a day of debugging, I realized I was returning
a negative tangential stiff, a
I bet on contact law returning nan value (division by 0, or something
like that).
Then velocity is NaN when this force is integrated.
Cheers.
Bruno
On 25/08/10 20:12, chiara modenese wrote:
Hi all,
what are the reasons for which one should get the following message
from a simulation?
9088
Hello Chiara,
I have no precise remark but you are indeed not the first one having
problems with "Nan" velocities : see
http://www.mail-archive.com/yade-dev@lists.launchpad.net/msg04519.html
and
http://www.mail-archive.com/yade-dev@lists.launchpad.net/msg04766.html
(at least).
Jerome
On 08/25/2010 08:34 PM, chiara modenese wrote:
.
but since this occurs only when I do a small a change in my law (say
in a case I include contact damping in the other I do not) I guess if
there could be any other cause related to some other parts of the
code. I only guess if any other
On 25 August 2010 19:12, chiara modenese wrote:
> Hi all,
>
> what are the reasons for which one should get the following message from a
> simulation?
>
> 9088 FATAL yade.ThreadRunner
> /home/chia/Documents/yade-r2394-psd2/core/ThreadRunner.cpp:31 run: Exception
> occured:
> Body #5653 has veloc
Hi all,
what are the reasons for which one should get the following message from a
simulation?
9088 FATAL yade.ThreadRunner
/home/chia/Documents/yade-r2394-psd2/core/ThreadRunner.cpp:31 run: Exception
occured:
Body #5653 has velocity==NaN!
In my case it happens right after I launch a triaxial t
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