No curve boolean ?

I'm looking to achieve in GH what the Rhino Curveboolean tool does :

select a bunch of curves (be they open or closed) , pick points to add regions together, and output a clean closed curve.

Sadly, RDiff, RInt and RUnion components only work with closed curves.

Examples of workarounds most welcome !

Cheers,

Olivier

Replies to This Discussion

Permalink Reply by kleerkoat on November 1, 2012 at 12:06pm

just thinking about it, it seems that it would be pretty difficult, i could see getting the individual regions that are created with the intersecting lines, but how would you know what regions to combine and which to ignore?

Permalink Reply by Olivier Suire on November 1, 2012 at 12:52pm

I'd use some vector magic to create points which are most likely inside the loops I wish to select.

It would not work for extreme cases, but considering the input curves that I have, it should be a piece of cake.

As a workaround, I'm trying to use the "Multiple curves intersector" component + "Shatter curves" + Join curves, but I'm stuck at the "Shatter" level...

Cheers,

Olivier

Attachments:

FICHIER TEST.3dm, 92 KB
Offsets.gh, 15 KB

Permalink Reply by Yoann Mescam (Systemiq) on November 1, 2012 at 2:51pm

Here is something I am playing with. (Cluster password protected and time limited)

Adding points parameter to work similar to rhino BooleanCurve is possible.

Contact me if it looks interesting.

Attachments:

Union.gh, 39 KB

Permalink Reply by Olivier Suire on November 1, 2012 at 3:39pm

Hmmm... Version 0.9.0014 here.

I/O error ; file does not open.

Looks great anyway !

Olivier

Permalink Reply by Yoann Mescam (Systemiq) on November 1, 2012 at 4:14pm

Probably bugged under rhino5 (I made it with GH on Rhino4).

Meanwhile perhaps this will solve your problem: (made with MCX)

Attachments:

Offsets.gh, 17 KB

Permalink Reply by Olivier Suire on November 1, 2012 at 4:24pm

Oh Yeah !

Thank you so much , this works like a charm !

Now comes the harder part : figuring out why :)

By the way, I realized that I still had version 0.9.0006 , and that's why your Union definition was not working...

Silly me...

Cheers,

Olivier

Permalink Reply by olivier on November 12, 2012 at 11:10am

wow looks great, but I can't use the file... it's probably already december !

would it be possible to have a look ? I need something similar but finding all the inner closed cells... Any thoughts ?

Permalink Reply by Yoann Mescam (Systemiq) on November 12, 2012 at 12:31pm

Does this one work ? (0.90014 needed)

What are the errors if it doesnt ?

Attachments:

Union2.gh, 30 KB

Permalink Reply by olivier on November 12, 2012 at 1:32pm

Hey thanks for the answer.

However, it's not doing anything, your cluster doesn't return anything. What should I put inside the "cells selecting" point input ? I tried with exterior and inside points, but still nothing... I have 0.90014 installed on rhino 5.

Permalink Reply by olivier on November 18, 2012 at 11:42am

hello ! i'm still can't make it work... Any ideas why ?

Permalink Reply by Yoann Mescam (Systemiq) on November 18, 2012 at 3:58pm

Oh sorry, I think it doesnt work because of a tolerance problem.

Set the rhino tolerance to 0.001 or lower in Tools->Options->Units (in rhino).

That should be working then.

If your curves create boundaries for very small regions, they have to be taken into account, if tolerance is too high they are ignored and it bugs the process.

Warning: it is a bit slow with 20 to 30 curves, and will take forever with more (exponential in time).

Permalink Reply by olivier on November 18, 2012 at 4:06pm

oh yeah great, it works, thanks a lot !

i just ran it on a couple of hundreds curves... takes forever :D

just a question : should it be working till january or does it really have a expiracy date ?

thanks anyway, great tool