This problem has been discussed from time to time on this and other forums, not only in relation to area and volume calculation but also in geometric constructions where circles intersect other objects.
The usual solution is to set the number of vertices to a large number, the size depending on the circle radius and the precision required.
very good!
It's amazing that it has been about a year since this thread was started...the abundance of scripts that have become available in that time!
i guess, the reason for choosing polygon instead of circle is that one then has control over the number of vertices.
i am not sure why you are refering to area...i don't think area came into the discussion
i find it amusing that the image at the start of this thread could also be generated by applying "diamond mesh" fencing material to a simple cylinder 
It still needs work imo.
I'm trying to figure out a neat way to produce a perfect model ie all bond lengths equal.
For a fixed bond length and number of repeat units, the variables are: bend angle of the hexagons, and radius of the nanotube. There is obviously a relationship between them.
And also it would be nice to model the other types of nanotube. 
great models and physics and video!
when i was a kid one of the best parts of building a car was crashing it afterwards
(i hope that wasn't just me)
In fact if you go to this page
and type in obj you'll find a selection of obj importers and exporters. i wouldn't be surprised if there were scripts for other formats as well...
Welcome to SketchUcation by the way Brian.
Jim keeps a mighty list of ruby scripts here. Definitely worth a look:
Steve
Hi Brian , you can download it from here:
Dec 18, 2010 - TIG just released a new .obj exporter. TIG's plugins are usually solid, so I recommend trying TIG's. ( TIG's OBJexporter on S...
(sketchuptips.blogspot.com)
Thanks to Jim 
Steve
obj-export ruby still works fine for me in SU7
Very well-worded summary Adam, thanks
thanks for that hd. Also another good thing about POV is that, being (more or less) open source, it continues to develop and grow in an independent way.
and of course it runs on windows linux and mac
This may have been suggested before, but maybe we could run a challenge to produce a render of some chosen model. People could use the renderer of their choice, using their renders to prove their point...better than through verbal discussion. The proof of the pudding...
True, that would be ideal. You could probably pick up XPPro on ebay for under US$50
I've been searching this forum for a library or repository of SU styles...I felt sure there would be one somewhere...like the list of rubies that we have. Is there such a thing?
many thanks for those wood textures Luis! Very useful
I would guess the fillet ruby wasn't around when Coen made the tutorial
First thing, don't give up!
I have become an old hand at keeping old machines alive.
If you can't reinstall, you need to do a major cleanup. Be prepared to spend some time.
Get rid of Windows Bloat:
http://articles.networktechs.com/printer-69.html
Get good antivirus software. I strongly recommend Comodo Internet Security (free AV and firewall) Do a scan.
Get the latest version of CCleaner and run it a few times
Scan with Spybot or whatever anti-malware package you want.
Defrag the hard drive. Check out Defraggler.
With CCleaner you can get rid of most of the programs that start with windows. And you can uninstall all those unnecessary apps. And you can clean up the registry.
OK that's for starters