Processing clusters of intersecting curves together

I have a large number of closed curves on a plane, some of them intersect, sometimes even more than two intersect. I would like to process the intersecting curves together, but I may have several such clusters. How do I find these clusters, and process each of them? (assume there are many)

Here's an example of such clusters before and after the desired processing I intend to do (which btw is explained here)

Replies to This Discussion

Permalink Reply by Danny Boyes on December 13, 2011 at 3:42pm

Region Union --> Fillet

Permalink Reply by Tali on December 13, 2011 at 3:50pm

Danny, thanks for the quick reply. I understand how to region union and then fillet. My question was how to automatically cluster intersecting curves in order to process them together.

For example, lets say I have a list of 60 curves, some of them intersect with each other, some of them don't. How do I find the intersecting ones and create lists of clustered curves. Then I could RUnion and Fillet them.

Permalink Reply by Danny Boyes on December 13, 2011 at 4:20pm

I don't understand. If they intersect, they get unioned if the don't, then not.

My definition above is a list of seven circles drawn in Rhino, referenced in GH in one Curve Param and then RUnion then Fillet. There's no need for any identification about which intersect or not before hand.

Permalink Reply by Michael Pryor on December 13, 2011 at 4:51pm

What about 2D metaballs?

Permalink Reply by Tali on December 14, 2011 at 7:50am

Hi Danny,

it's a great solution if all curves are on the same plane, however in my case the curves are spread on different planes.

When I try to Runion the whole list of curves, it creates one big shape, whereas I would like to Runion them on each plane separately.

I tried using path mapper and dividing the list into groups, however on different planes I have a different amount of curves...

Is there a way to divide the list according to Z heights?

here is an image of a subset of the curves I'm working on.

Many thanx :)

Permalink Reply by Danny Boyes on December 14, 2011 at 8:34am

Hi T,

Here's a solution that will place all circles with the same Z value on the same branch. Beware of rounding errors, you might want to force the values to 3 decimal places with an Fx component with F= "Round(x,3)". Also Be warned that any branches with only one circle on don't make it into the output of the RUnion component. Not sure if this is a bug or normal behaviour, you will have to ask David.

Attachments:

groupCircles.gh, 8 KB

Permalink Reply by Tali on December 14, 2011 at 8:54am

Danny, I wasn't able to open the file, an error message popped up saying the read/write operation failed.

"unable to read beyond the end of the stream"

Permalink Reply by Danny Boyes on December 14, 2011 at 9:06am

Which version of GH are you using?

Permalink Reply by Danny Boyes on December 14, 2011 at 9:07am

The important bit is highlighted in Purple

Permalink Reply by Tali on December 14, 2011 at 9:29am

I'm using version 0.60059

what is the component connected to the R input of the Replace component? if I don't have it in the version i'm using, is it possible to replace it with another component?

Permalink Reply by Danny Boyes on December 14, 2011 at 9:43am

I'm sorry you won't have it. Can you upgrade?

Permalink Reply by Tali on December 14, 2011 at 9:57am

Does the GH 0.8 work with Rhino 5.0 ?