In article <402902af@news.povray.org>,
"David Wallace" <dar### [at] earthlinknet> wrote:
> > Of course I meant "tangents", not "normals" in my posting...> > The 2nd derivative is the normal.
And the first derivative is the tangent. Sascha just got the terms
switched.
--
Christopher James Huff <cja### [at] earthlinknet>
http://home.earthlink.net/~cjameshuff/
POV-Ray TAG: <chr### [at] tagpovrayorg>
http://tag.povray.org/
net> wrote: