How to remove the small rectangle inside the big rectangle

how to remove the small rectangle which is inside the large rectangle, as shown below:

i am newbie,thank you for your answer.

Replies to This Discussion

Permalink Reply by David Rutten on July 15, 2017 at 2:51am

You can use the [Boundary Surfaces] component to solve the tricky nesting topology. You then have to jump through a few hoops to get back at your rectangles, but I think in the end it's probably the easiest solution.

You may run into problems if your rectangle pairs are intersecting or nested within each other, because that will confuse the [Boundary Surfaces] component.

Attachments:

rectangleextractor.gh, 13 KB

Permalink Reply by chu on July 15, 2017 at 3:55am

the GH file did run into problems. here are zhe 3dm file. thank you very much.

Attachments:

rec.3dm, 69 KB

Permalink Reply by David Rutten on July 15, 2017 at 5:40am

Some of your outer rectangles are doubled up. That'll need to be fixed first. Also, some of the duplicates are not entirely identical and have seams starting in different corners. How did you get these rectangles?

Permalink Reply by chu on July 15, 2017 at 6:35am

These rectangles come from architectural drawings designed with ACAD.

Permalink Reply by David Rutten on July 15, 2017 at 7:34am

Any hope of getting rid of the duplicate curves there? I noticed the SelDup command in Rhino didn't find them all, presumably because even though the shapes look identical, they actually start in different corners and have slightly different coordinates.

Permalink Reply by chu on July 15, 2017 at 7:40am

Just go to the other, trying.

Permalink Reply by chu on July 15, 2017 at 8:08am

here has an idea: the center of the rectangle is overlapping, whether can be by comparing the central location, then to delete the small rectangle. but I do not know how to operate

Permalink Reply by David Rutten on July 15, 2017 at 11:42am

If the rectangles are 'concentric', then yes, you can do this. Although I suspect you'll still have to specially deal with the duplicate ones.

Permalink Reply by David Rutten on July 15, 2017 at 11:47am

Nah actually you don't.

Attachments:

filterbycentroid.gh, 11 KB

Permalink Reply by chu on July 15, 2017 at 9:02pm

hi,David Rutten,thanks very much.

by the end, I use vb script to write a small program according to the size of the district to decide which will do the following operation, and finally get.

thanks.

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