K <obe### [at] yahoocom> wrote in message
news:3cae3c32@news.povray.org...
> That is a really nice Celtic Knot,

Thank you.

> would you mind posting the source, i have
> been meaning to do up a big one, and had no idea how to begin.
>

i don't have enough of the source left to be much help. As for where to
begin, I began by using a torus and several cylinders to plan out the knot
intersections. I then numbered the intersection points of the knot and made
an array that traced the entire knot through the intersection points. The
intersection points were on the x,y plane, so I added <0,0,1> to each point
which was meant to be underneath.

After tracing the path of the knot, I went back into my array and added
points in between the intersections to improve the shape of the curve.

Hope this helps.
 -Shay

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