Amazingly, you can create Guilloche patterns in GIMP fairly easily.

That pattern looks pretty good.
Spirogimp?

Cool mahvin...how you did ?

Interestingly enough another filter just came out on the registry called gat-lines
http://registry.gimp.org/node/25157



You can get some neat results after running it with both directions and a little iwarp action with the Swirl selection tool.

same image from Mahvin but 3 clicks after




no manual work, just 3 clicks

PS take care now may attract you with a sensation of inner movement and then hypnotize

with same 3 clicks is also possible...



or

This is cool-

There are several other interesting:

Sinedots II (8bf)
http://www.philipp-spoeth.de/photoshop/sinedots2.php

Winplot for Windows 95/98/ME/2K/XP/Vista/7 (802K)
http://math.exeter.edu/rparris/winplot.html

Peanut Software Homepage
http://math.exeter.edu/rparris/

Winplot is not a plugin for Gimp - but with export: eps, svg ...
Dream slowly - if something similar would be in G'MIC ...

i got lost with links from link 3...too much goodies there and all too complex...

I agree with you PC i bookmarked that one for later study

I saw that and couldn't figure what it gave beyond the built-in Filters->Render->Patterns->Grid and just setting one grid to 0?

-Rob A>

I just checked my first post and can't believe I didn't add the "how I did it" part.

I used script-fu-shapes.scm from the Registry:

http://registry.gimp.org/node/22016

This script needs to be fixed, though, it won't allow you to use any other placement of x and y on your image, only "auto center". So be warned, if you turn off auto center, the script will crash. I've sent the author an email LONG time ago, and again yesterday. As long as you use auto center, it works fine. Maybe Saulgoode or RobA would want to take a look at it, to see why it's not working when "auto center" is off?

I tried using that script a couple of months ago and it has more problems than just "auto-center".

So, as an exercise to learn Script-Fu, I rewrote it, keeping only the part for paths. (I've never used a LISP family language before.)

The script registers in the paths menu (right-click on a path) as Copy-rotate-shift...

This one does allow you to use any brush tip.I do not know if the grid tool does or not.I still do not know what you would use GAT for though

It was an experiment in running plug-ins with a choice of language also.A language file is included in the setup.