Grasshopper definition for a Circular moire effect.

I am trying out a circular moire effect. I wanted to have various centers for various circles (say 7 circles) and on every center would have a series of concentric circles like in the image below. The difference would be, I think, that the radius growth would increase not linearly but with a growing difference everytime. Say for instance that I have a 1.25 growth factor from circle to circle and also can anyone help me with the same growth principle like the one in the image? How can I have (n)number of circles growing inside a circle?

Thank you!

Replies to This Discussion

Permalink Reply by Chris Tietjen on December 26, 2012 at 6:08pm

This would be the basic idea. You can place them wherever you want by changing the plane origin for the Circle component and how they look by changing the starting number, the spacing and the count in the Series component.

Permalink Reply by Chris Tietjen on December 26, 2012 at 7:18pm

Here's a bit more.

Attachments:

9_Moire.gh, 8 KB

Permalink Reply by Zafrin Hossain on December 26, 2012 at 9:13pm

Thank you so much! It's perfect. :)

Permalink Reply by Jissi Choi on December 26, 2012 at 9:07pm

You mean something like this..??

Attachments:

Moire_Revised.gh, 14 KB

Permalink Reply by Zafrin Hossain on December 27, 2012 at 9:55pm

Thank you. But I wanted this Moire to be an engraving on a metal sheet. Why doesn't the grasshopper definition work on the circles? Can anyone please help. For another engraving that I tried, there's another problem with the corners. The scoring seems to skip the corners of the rectangle. I hope someone can help with the two problems.

Attachments:

Permalink Reply by Chris Tietjen on December 28, 2012 at 6:20am

Your questions aren't clear to me. Why doesn't which definition work on which circles? It appears that you've successfully created the circle moire in the .3dm file. What else are you looking for? Also what are the inputs for the Guillochage definition? Are you using a cnc machine to engrave the guillochage?

Permalink Reply by Zafrin Hossain on January 2, 2013 at 4:47am

Yes, I am using a CNC machine for the engraving. The moire works perfectly, but i was using another pattern for engraving. Something like the iso curve, but it's actually a simple diagonal pattern.

Permalink Reply by Chris Tietjen on January 2, 2013 at 6:56am

I can't really say from looking at the picture. Are the tool paths for those corners showing up in the G-code file that you send to the cnc machine? CAn you post the G-code files?

Permalink Reply by Zafrin Hossain on January 3, 2013 at 9:25am

Hey Chris,

Going back to the circle moire, can you help me with the definition if I wanted the distance between the concentric circles to increase when they go away from the center of the circle? Something like this..say if the distance grew by 1.25 as it went away from the center.