David,

Sorry, I can't help you, but you may get more replies if you were to cancel
this post and repost in povray.advanced-users.

All the best,

Andy Cocker

"zhiwu (david) fang" <zfa### [at] caltechedu> wrote in message
news:3C8FE83F.5E83EDFC@caltech.edu...
> I was trying to animate the process of multiple particle collisions with
> generated data by another program. The data file contains position,
> translational velocity & angular velocity for N particle on T steps. I
> used #while-#end directive and  a counter "istep"  trying to read in
> data for all T steps, but it seems that it repeatedly  read data for
> first step. Could anybody help me out?  With my thanks in advance.
>
> david
>

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