"kurtz le pirate" <kur### [at] yahoofr> wrote in message 
news:kurtzlepirate-E41D8B.18491611032006@news.povray.org...
> hello,
>
>
> for a 3d curves defined by a sple, it's easy to define at each points of
> the cuve, the frenet frame.
>
> but... how to draw in this new frame ?
>
> povray has somes functions/utilities/macros to draw in the frenet frame ?
> nothing found on the web...
>
>
> thanks
>
> -- 
> klp

Hi Kurtz,

I may be oversimplifying this, but do you just mean that you want to place 
objects relative to the frenet frame for a specific location on the spline?
If so can't you define them at the origin and transform them using 
Spline_Trans?

Regards,
Chris B.

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