[ODE] newbie joint question

[Jon Watte]

I think these are the reasons nobody answer your question:

Your diagram makes no sense in isolation (what are the joints? What does it look like initially?)

Your description makes no sense (what is your goal? how do you set it up? what is the actual movement of the bodies? what is the expected movement?)

And why do you think this is related to joint stability? If I can see anything from your diagram, it's that some bodies are at least a meter away from where you probably want them -- although you don't specify what you are actually drawing, and how. This is likely a setup/correctness problem, not a stability problem. Stability problems are when things explode totally, or when they never quite settle.

Cheers,

			/ h+


-----Original Message-----
From: ode-bounces at q12.org [mailto:ode-bounces at q12.org]On Behalf Of Piotr Obrzut
Sent: Wednesday, December 01, 2004 11:20 PM
To: ode at q12.org
Subject: Re: [ODE] newbie joint question


Hi,

W Twoim liœcie datowanym 30 listopada 2004 (23:52:16) mo¿na przeczytaæ:

PO> Hi,

PO>    I have problem with joints stability, see picture:
PO>    http://mathrick.org/files/joint_error.JPG

PO>    while plaing with CFM and ERP the only thing I've achieved was
PO>    sloving the effect which you can see on the annexed picture.
PO>    All bodies are connected with ball joints now so i was thinking
PO>    that it would work as i wanted to (the tranlation between bodies
PO>    shouldn't change as much through the time i was hoping that changes
PO>    will stop at some known limits)

PO>    I wonder if it is possible to lock mine model bodies relative translations
PO>    without such effect (seen on picture) with ode joints? Or I should
PO>    invent some kinematic solution for it?

PO>    I've spent a lot of time searching for some examples of sth
PO>    which will resolve mine problem, but without any effects...
PO>    PLEASE HELP
   

Did I ask mine question in stupid way, or it is cramped (b/c of mine
english) or no one knows the answer?


-- 
greetings,
 Piotr Obrzut

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