Thibaut Jonckheere <tua### [at] yahoofr> wrote:
>I wish a had the
> spline describing the car path along the whole knot, so I could for
> example make an animation, but this would require to read manually the
> position of a few hundreds vertices in wings :-/ I could not figure an
> easy/lazy way to get this info yet...
>
>
>
> Thibaut

You might check out my knotsplines macro, where I describe how to get a
spline from the povray-exported bicubic patch done by KnotPlot.

Basically, I use Microsoft Word (Python or something similar would be much
easier, I'm guessing), to take the first vertex point from each patch (I
know, it would be more accurate to take one of the interior ones, since the
"edge" vertices are control points....), and put them into an array, and
form the spline from the array -- the readme/macro shows how:

http://tinyurl.com/lfvar

(although, when I try to save the zip file over the web view, it comes
through corrupted; when I try to download it with the newsreader it works
fine.  I'm not sure why.)

If you'd like a copy, I can send you one.

Dave Matthews

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