Diagonals and symmetries, another one to doodle during meetings

ofnuts · **Joined:** Oct 25, 2010 **Posts:** 4812

So, to help a user on Gimpforums, I wrote ofn-symmetries.

The basic idea is simple:
- take a small square image
- Layer>Symmetries>Diagonal symmetry>{NE|NW|SE|SW} to symmetrize a corner
- Layer>Symmetries>Quadrilateral symmetry, applied several times in a row (at least twice), to make the pattern appear

Then take any picture, crop to a square, and play.

For instance, extracted from an infographic on battleships, the bow of the Richelieu, the "pagoda" of the Yamato, and the stern of USS Iowa:

Attachment:

Richelieu+Iowa.png [ 470.08 KiB | Viewed 4881 times ]

doronf2 · **Joined:** Mar 06, 2015 **Posts:** 308

Hi
I like the effect.
Thanks
Doron.

Meemaw · **Joined:** Mar 15, 2016 **Posts:** 180 **Location:** USA

Wow, me too! It's really fun to do!

Thanks, ofnuts!

Graechan · **Posted:** Tue Apr 12, 2016 6:36 pm **(#4)**

Just starting to play with this ofnuts

Wallace · **Posted:** Tue Apr 12, 2016 7:20 pm **(#5)**

Thanks Ofnuts! :bigthup

It looks like another fine .py file creation by your's truly.

Graechan · **Posted:** Tue Apr 12, 2016 8:25 pm **(#6)**

It's great for unique borders

Rashid · **Joined:** Dec 29, 2015 **Posts:** 223

This feature was missing in gimp. Wonderful addition to GIMP.

Thanks

sallyanne · **Posted:** Tue Apr 12, 2016 11:22 pm **(#8)**

whoo hoo, this is better than array

sallyanne · **Posted:** Tue Apr 12, 2016 11:38 pm **(#9)**

Ended up with a transparent area in the middle. How do I stop that from happening?

sallyanne · **Posted:** Tue Apr 12, 2016 11:59 pm **(#10)**

think I figured out about the transparent area. "Don't have any to start with!"
Also the layer > swap > center and corners, removes it.

Issabella · **Posted:** Wed Apr 13, 2016 3:40 am **(#11)**

Thank you so much ofnuts. :tyspin

sallyanne · **Posted:** Wed Apr 13, 2016 5:44 am **(#12)**

Beautiful colours Issabella

Issabella · **Posted:** Wed Apr 13, 2016 7:48 am **(#13)**

Thank you Sallyanne,

ofnuts · **Joined:** Oct 25, 2010 **Posts:** 4812

More fun when used on a random image (here, a screenshot of GimpChat):

Attachment:

GimpChat-quad.png [ 380.17 KiB | Viewed 2473 times ]

Issabella · **Posted:** Wed Apr 13, 2016 9:00 am **(#15)**

ofnuts, thank you again for such nice filter.

sallyanne · **Posted:** Wed Apr 13, 2016 9:35 am **(#16)**

Had to have another go. I took a small square out of a photo

Full size is here https://www.flickr.com/photos/115367823 ... 1/sizes/o/

sallyanne · **Posted:** Wed Apr 13, 2016 9:58 am **(#17)**

ofnuts wrote:

So, to help a user on Gimpforums, I wrote ofn-symmetries.

The basic idea is simple:
- take a small square image
- Layer>Symmetries>Diagonal symmetry>{NE|NW|SE|SW} to symmetrize a corner
- Layer>Symmetries>Quadrilateral symmetry, applied several times in a row (at least twice), to make the pattern appear

Then take any picture, crop to a square, and play.

For instance, extracted from an infographic on battleships, the bow of the Richelieu, the "pagoda" of the Yamato, and the stern of USS Iowa:

Stupid question, but here goes - just incase I'm not the only one. :oops:

To get the 4 corners do you just do this with one of the (ne, nw, se, sw)?
Or do you do one of each on the same picture.
I have found I can only do two at the most and the others don't do anything.
Quadrilateral I have worked out...Diagonal not.

ofnuts · **Joined:** Oct 25, 2010 **Posts:** 4812

I apply the diagonal symmetry only once. The trick is to finf the corner that will produce the most interesting result.

Issabella · **Posted:** Wed Apr 13, 2016 12:34 pm **(#19)**

Yes ofnuts, I applied it in diagonal once and then played it in quadrilateral. It's funny. :tyspin

Issabella · **Posted:** Wed Apr 13, 2016 12:41 pm **(#20)**

and another,