Divide domain and isotrim tools to divide loft surface.

Hi, I'm a beginner to grasshopper, and have been doing some online tutorials. In the following tutorial, I was trying to divide loft surface using "divide domain^2" and "iso trim" tools, but didn't divide the surface. Divide domain tool keep giving me an error (please see the following screenshot).

video tutorial location (the instructor was demonstrating dividing surface around 1:02:40)

http://www.gjd3d.com/video/generative-jewelry-design-with-grasshopp...

And the following screenshot is the next thing I'd tried. I saw other people were having same problem, and I've tried to use Explode (brep component) tool.

It divided the surface but worked for only half surface. I think this should divide for entire loft surface.... I don't know what the problem is. I would appreciate if anyone could give me suggestions/ helps. Thank you in advance.

Attachments:

ring_video_tutrial_01.gh, 5 KB
ring_video_tutrial_01.3dm, 29 KB

Replies to This Discussion

Permalink Reply by Andrew Heumann on April 6, 2012 at 11:00am

The problem is that your Loft is producing a BRep, or polysurface, instead of a single surface. There are two options:

1. Change your loft options to include "rebuild" to ensure that a single surface results.

2. right click the "S" input to the subsrf component in your uploaded definition and choose "graft." You'll notice that the divide domain^2 outputs results in two data tree branches (0;0;0;0 and 0;0;0;1), whereas currently the surfaces coming in to the subsrf are in a single branch (0;0;0). Grafting puts each surface into its own branch, allowing the subsrf component to properly match the divided domain with each item.

Permalink Reply by hmhm on April 6, 2012 at 4:56pm

Awesome! Thank you so much for your suggestion and explanations.

Permalink Reply by martin on June 11, 2012 at 12:54pm

excelente

Permalink Reply by Kuber Patel on May 2, 2017 at 10:27pm

Thank you

I had a similar problem lately spend the whole night yesterday dividing my muplitple open brep into UV lines and then using mesh from lines to achieve a simple quad mesh. :(

I had completely forget about loft edit options.

Made my life a whole lot eassier.:)

Cheers.

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