> Thank you Samuel, this looks very good indeed. Over the weekend I ported the C
> code mentioned here: http://paulbourke.net/geometry/2circle/ to a POV macro and
> that does give me the same result. I might move to your way, was it is much more
> POV like.
>
> My first attempt at an animation is here:
> http://legopov.blogspot.co.uk/
>
> As mentioned, I am not sure the bottom part should move like that.
>
> Thank you for your help,
>
> Thomas
>
>
All parts should always move at the same rate. After all, it's not an 
elastic.
Just adding another point on your spline under the bottom part, with the 
same separation as the previous ones, should do the trick.




Alain

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