How To Trim Lines To Fit Within A Given Volume ?

Hi there,

I'm struggling with a personal project of mine which consists in creating a script which will trim an orthogonal structural grid to fit any given building volume (see images attached).

At this point, I have all my columns and beams represented by simple lines and a building volume as a brep.

I've experimented with many intersection components but without success...I must be missing something since surely this can't be too difficult?

Thanks in advance for any tips regarding how to tackle the issue!

Nathan

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Replies to This Discussion

Permalink Reply by Joseph Oster on November 12, 2017 at 8:16am

You'll get a better answer if you post a model - GH and/or Rhino.

http://www.grasshopper3d.com/forum/topics/curvilinear-scaffolding-s...

Permalink Reply by Nathan Stuckey on November 12, 2017 at 8:29am

Thanks for the link, I'll take a look.
Here are the GH and Rhino files as requested :)

Attachments:

Example_Volume_2.3dm, 284 KB
Structure Trim To Volume 1.gh, 18 KB

Permalink Reply by Hyungsoo Kim on November 12, 2017 at 9:09am

Check attachment.

Attachments:

StructureTrimToVolume1_re.gh, 18 KB

Permalink Reply by Joseph Oster on November 12, 2017 at 9:28am

In case anyone else doesn't have Kangaroo, you can see Hyungsoo Kim's solution by making this connection:

By the way, is there any reason for using the 'Mirror' components instead of just making the 'RecGrid' bigger??

Permalink Reply by Nathan Stuckey on November 12, 2017 at 11:17am

I only mirrored things because I initially wanted the grid to be centered on the origin; this is probably redundant at this stage!

Permalink Reply by Joseph Oster on November 12, 2017 at 11:33am

I mention it because 'Mirror' can create complications in data trees, point/line sequences, curve and surface UV directions, etc.

Permalink Reply by Nathan Stuckey on November 12, 2017 at 11:59am

Ok, thank you for pointing that out! ;)

Permalink Reply by Nathan Stuckey on November 12, 2017 at 11:29am

Ah! Thank you very much Hyungsoo Kim, I thought I was in the right ball park...it was just a matter of finding the right component!

Permalink Reply by Nathan Stuckey on November 12, 2017 at 12:02pm

However, now I see that the trimmed columns and beams are "grouped together" rather than being separated by level; is there a way I can get them back to being seperated this way via graft/flatten or something? Apologies if this seems easy, I'm still trying to understand how data trees work...

Permalink Reply by Hyungsoo Kim on November 13, 2017 at 10:22am

If you'd like to preserve the input data tree structure, then just don't "Flatten" Trim with Brep's curve input and use "Shift Paths".

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