[ODE] ODE Message 2: vector has zero size in dNormalize4()

[Holger Urbanek]

Let me guess: Two of your hinge-axes are perpendicular to each other?

I'm also regualry experiencing this oddity, even with not too
excessive<http://dict.leo.org/ende?lp=ende&p=/gQPU.&search=excessive>torques
(around 1 applied through dJointAddHingeTorque) for a link-mass of
around .1 and link-length of about 1.

Only solution for me is decrease the step-size (below .001, sometimes even
smaller) which is, however, a big penalty regarding computig time.


On 7/12/06, dvir schirman <dvir.boost at gmail.com> wrote:
>
> Hi
>
> I'm running a simulation of a robot at ODE.
> My robot is made out of three rectangular boxes connected with two hinges.
> My simulation is working. But, when I run it I get the following message
> repeatedly:
>
> "ODE Message 2: vector has zero size in dNormalize4()"
>
> What does this message means?
> What effect would it have on the result of my simulation?
> How it effects the efficiency of my simulation?
>
> I'm using Cygwin g++ 3.4.4.
>
> Thanks for your help,
> Dvir
>
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