trimming a surface

I can't figure out how to trim this surface. I found a thread that shows it happening, but I can't seem to replicate this.

http://www.grasshopper3d.com/forum/topics/curve-trim-on-surface

Can anyone help me figure this out, I want to remove the circles from the polysurface?

Attachments:

loopy box 012712.gh, 12 KB

Replies to This Discussion

Permalink Reply by Yoann Mescam (Systemiq) on January 28, 2012 at 2:34am

You have to project your curves onto the object if you want to trim it.

By the way this is not a polysurface, but a single surface, which makes things easier.

Here is a way to do it:

With a BRep, you would have to adapt that a little.

Attachments:

loopybox012712-Systemiq.gh, 18 KB

Permalink Reply by Liam Morrow on January 28, 2012 at 6:02pm

Thanks, is it possible to do the same with the surface subdivided like i had in the initial image? I tried connecting the divided surfaces from the subsrf component into the project to surface but i think there has to be some kind of sorting. Any ideas?

Permalink Reply by Yoann Mescam (Systemiq) on January 30, 2012 at 6:19am

Try this so.

Attachments: