Wasn't it John D. Gwinner who wrote:
>Forgive me if this has been discussed before, I did do a search ..
>
>I'm looking to animate some 'tank treads' - basically a series of objects
>around a path, but the path may change as the bogey wheels go up and down.
>
>I could probably settle for fixed bogey wheels ...
>
>I thought I'd seen a macro that would take a path bounded by circular
>regions and distribute items around it, but I can't seem to find that
>anywhere.  The chain macro would help if I'm doing a german type of tank.
>
>I'd be surprised if someone hasn't worked on this already ...

There's a "beltbuild" macro that does it for a belt around two wheels.
That's probably what you were thinking of.

I believe the macro is in "mopspatch.inc" which was at
<http://perso.wanadoo.fr/mops/atelier.htm> the last time I looked.

-- 
Mike Williams
Gentleman of Leisure

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