Selection of split surfaces

If I split a surface with a closed curve, is it possible to select the resulting inner or outer region of the surface?

Thanks,

Eric

Replies to This Discussion

Permalink Reply by Eric Jolley on September 10, 2012 at 10:08am

Here's an example of the type of situation I need to solve.

Eric

Attachments:

trimexample.3dm, 71 KB

Permalink Reply by Vicente Soler on September 10, 2012 at 11:11am

That doesn't meet one of the conditions, so you can't use that method.

Can you use a closed solid to trim the surfaces? You can use a script with the method "brep.Trim(otherbrep, tolerance)" to keep only inside part.

Permalink Reply by Michael Pryor on September 10, 2012 at 11:33am

If its only this many trims, I would say either list item it, or just do it in rhino.

Permalink Reply by Eric Jolley on September 10, 2012 at 11:40am

The ultimate goal is to use a genetic algorithm to move the surface boundaries in a search for an optimum centroids location and moment of inertia targets, so it is indeed only a few surfaces, but will be part of a looping process.

I wonder if instead of creating rectangular surfaces and trimming them, Grasshopper has the capability of creating surfaces using intersecting bounding curves a la CurveBoolean?

Thanks for your time.

Eric

Permalink Reply by Vicente Soler on September 10, 2012 at 12:21pm

Yes, but both curves have to be planar.

Permalink Reply by Michael Pryor on September 10, 2012 at 1:03pm

for future, may be simpler to just state the problem in its entirety at first, rather than adding pieces of new info per comment. You will get the answer you desire faster that way.

Permalink Reply by Eric Jolley on September 10, 2012 at 1:13pm

That's probably good advice.

Creating surfaces from intersecting regions is working well.