[ODE] how to debug and fix NAN values

Bram Stolk b.stolk at gmail.com
Mon Oct 22 08:45:23 MST 2007

Run the app in a debugger.
You wil get a call-stack.

We would like to know in what part of the code, the normalization was

When I got this error, it was because I had a triangle that had a
zero-length edge.
Thus, two vertices co-incided.


On 10/22/07, Hampa <hampa at toribash.com> wrote:
> Hi,
> Every now and then my simulation produces NAN values, usually during
> collisions using hi velocity objects.
> In the debug build (lastets 0.9 svn checkout) I get asserts in:
> ODE INTERNAL ERROR 1: assertion "bNormalizationResult" failed in
> _dNormalize4() [../../include/ode/odemath.h]
> What is the recommended way to debug and fix this kind of problems?
> cheers,
> hampa
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Zapp: Captain's log, stardate...er..
Kif: Ohhh. April 13th.
Zapp: April 13th. Point 2.
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