[ODE] executive toy

[Daniel Monteiro Basso]

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

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 :)

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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