Packing FROM the circles

Replies to This Discussion

Permalink Reply by David Rutten on February 6, 2017 at 5:10am

The bottom most boundary edge only touches a single circle. How do you define where along the circle it touches?

Permalink Reply by David Rutten on February 6, 2017 at 5:24am

Anyway, given a set of (closed) curves you can use [Convex Hull] to find a reasonable approximation of the boundary. If you then remove all the short line segments from this hull and extend the remaining ones until they intersect, you can use those extended lines to cut a whole bunch of surfaces one of which is the one you're looking for. Unfortunately this approach does require you to hand pick both the fragment bounds (just a rectangle large enough to contain your desired shape) and the extension length. 

Attachments:

• surrounding shape.gh, 19 KB

Permalink Reply by Aishwarya on February 6, 2017 at 5:35am

Wow thanks a lot David! It's really helpfull. 

Permalink Reply by Matt Gaydon on February 6, 2017 at 6:24am

Here's another approach using Circle Circle Tangents. to calculate outlines. 

When you input the your circles if you end up with a crazy mess just switch the value list to + and it should solve the issue and give you a clean outline. Is an issue with Curve direction and offset curve region does not work with just touching circles it seems.

Attachments:

• CIRCLE PACKING BOUNDARY.gh, 15 KB

Permalink Reply by Aishwarya on February 6, 2017 at 7:24am

I'll try this one too then, thanks a lot! 

Permalink Reply by Aishwarya on February 6, 2017 at 7:35am

Matt, the line|line component isn't really working. The relative item gives only empty item so the entries for the line|line component are empty too. 

Permalink Reply by Matt Gaydon on February 6, 2017 at 7:53am

Its to do with the tree structure of the input list i think.

If you right click the T input on the Relative item Component and click Flatten, Then replace the text in the Panel that plugs into the O with this..

{0}[+1] 

Its should hopefully work as expected.

Permalink Reply by Aishwarya on February 6, 2017 at 8:07am

Thanks for the reply. But the outline is messy even when i switch to +. 

Attachments:

• Programme.gh, 35 KB
• areas2.xlsx, 9 KB
• Sans titre.3dm, 156 KB

Permalink Reply by Matt Gaydon on February 6, 2017 at 8:44am

Could you just upload a file with the Circles internalised in the code as i can't get the space syntax plug into work as expected.

I am wondering if i creating and example that worked because all my circles where tangent to 2 others.. 

Davids code on the other hand seems unbreakable ;)

Permalink Reply by Aishwarya on February 6, 2017 at 9:00am

Haha yeah his code works fine but I want to try yours too because i'll have a lot of circle later that's why. 

Here's the file Matt. 

Attachments:

• CIRCLEPACKINGBOUNDARY.gh, 16 KB

Permalink Reply by Matt Gaydon on February 6, 2017 at 12:51pm

I think i have solved it.. Hopefully... with rather a bit of a re-write based on some ideas from David's code using Convex Hull Component.

Attachments:

• CIRCLEPACKINGBOUNDARY_MG EDIT.gh, 11 KB

Permalink Reply by Aishwarya on February 7, 2017 at 1:50am

Works perfectly! Thanks a lot guys! 
Back to work now haha.