In article <3A0EB1DE.C830462B@peak.edu.ee>, Margus Ramst 
<mar### [at] peakeduee> wrote:

> What do you need it for? Scaling the cylinder up along its axis can 
> make it seem infinite for any purpose I can think of.
> You can make an isosurface with an infinite cylindrical function, but 
> this too will have to be contained by an infinite object.

As I recall, the list of possible contained_by objects is very 
short...box and sphere last I heard.

However, a quadric should do the job, if an infinite cylinder really is 
necessary. Maybe a "infinite" keyword could be added to cones and 
cylinders...all it would have to do is remove bounding and not clip the 
ends and render disks there.

-- 
Christopher James Huff
Personal: chr### [at] maccom, http://homepage.mac.com/chrishuff/
TAG: chr### [at] tagpovrayorg, http://tag.povray.org/

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