[ODE] what is wrong with amotor joint?

[Krystian Ligenza]

Hi Hampa,

Thanks for reply.
The range is less than +/- Pi/4, so I think the problem is somewere else.
I also tried to set dParamBounce to 0, or dParamCFM to 0.01, dParamStopCFM
to 0.01..and played with dParamFudgeFactor,dParamFMax,dParamVel and
nothing seems to correct shaking behavior. Any other ideas?

Regards,
Krystian

> Hi Krystian,
>
> Try lowering the range for your joint stops. Most important is to
> make axis 1 having a range less than Pi, which means you should make
> it even smaller since the joint might need some space for bouncyness.
>
> There is a better explanation about that in the ODE user guide that
> you could check out (7.3.8 page 39).
>
>
> Cheers,
> Hampa
> Toribash.com
>
> On 07 Dec 2006, at 6:33 AM, Krystian Ligenza wrote:
>
>> maybe with this two movies I could show my problem clearier:
>> http://www.pjwstk.edu.pl/~s2562/ragdoll_noAdd.avi
>> http://www.pjwstk.edu.pl/~s2562/ragdoll_addTorque.avi
>>
>> As I mentioned earlier, I wanted to add PS controller to my
>> radgoll, using
>> well know equation:
>> torque = Kp*(des - cur) - Kd*vel;
>>
>> For this tests, the Kd is set to 0. First movie shows a ragdoll
>> with PD
>> controller applied only to hinge and universal joints (ball joint with
>> AMotor joint are set for spine,chest and head). Everything looks
>> "ok". But
>> when I add torque to AMotor joint, joints start to shake (second
>> movie) -
>> were is the problem?
>>
>> Thanks
>> Krystian
>>
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>
>