[ODE] executive toy

[Michael Lacher]

Daniel Monteiro Basso wrote:
> Hi Michael,
> 
> this 'executive toy' is usually called "Newton's Cradle". I modelled it
> using ODE in Dec/2003, and made a fancier version with my simulation
> framework this month. You may take a look at:
> 
> http://www.inf.ufrgs.br/~dmbasso/phi/
> http://www.inf.ufrgs.br/~dmbasso/phi/20040705-1-NewtonCradle.avi
> http://www.inf.ufrgs.br/~dmbasso/phi/newton.html
> 

Thanks. Someone already pointed my to that link, and I have to say it 
looks great. From what I am gathering from the scriptfiles (radiosity 
stuff) I guess you didn't do those in realtime though, did you ? Not 
that it would have any effect on ODE, I was just curious because the 
shadows look so excellent :)


> The last link is the script source code to generate the video. You will
> be specially interested in the surface contact parameters (specified in
> the 'material' section of the object definition). I think the key to
> solve your problem is to play with the bounce parameter (dContactBounce)
> 
> I hope this helps :)
> 
Ah yes, i found them. I will try how it works out with those parameters.

> Cheers,
> 
> Daniel
> 
> On Tue, 2004-07-27 at 06:24, Michael Lacher wrote:
> 
>>Hi!
>>
>>   I tried to make something resembling an executive toy (the kind where 
>>some balls are suspended in a row, and when you hit the first, it will 
>>stop, and the last one will swing, etc ... 
>>http://www.desktoy.com/item.html?PRID=1151256).
>>
>>   I have had serious problems, getting this to work, and so I wanted to 
>>ask if anyone knows if the ODE is actually capable of correctly 
>>simulating these things (ie: can the force/energy be transferred from 
>>the first to the last ball through all the others without disturbing 
>>them ?) What happened in my simulation was that when the first ball hits 
>>the rest, all 4 of them start moving in a group, but with only one 
>>quarter of the velocity ....
>>
>>regards
>>mucki
>>
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> 
> 
>