Select only "interior" corners of a surface

Hello,

I have a lot of angular surfaces on Rhino and I would like to know if there is a way of selecting only the interior corners (points) from all the surfaces via grasshopper.

I would like to cnc these surfaces. Where there is an interior corner I need to place a dog-bone cut for the router to penetrate. For further understanding of this please google "interior corner cnc" in the images search it makes it clear what I am trying to say.

But basically all I need is to be able to select all the interior corners.

Thank you

Replies to This Discussion

Permalink Reply by Michael Pryor on May 9, 2013 at 11:48am

files,images,sketches???

Permalink Reply by Marios on May 9, 2013 at 12:33pm

Hello,

I hope this jpeg clarifies. It is an example of a shape I want to cnc. I need to alter all of the "interior corners" from right angles to dog-bone fillets (as shown in the "zoom" window). Since I have to select and change the interior corners out of 20 sheets full of these shapes I was wondering if grasshoper could do it for me as it would take too long doing them individually.

The red dots are marking the "interior corners".

Thanks

Attachments:

corner.jpg, 174 KB

Permalink Reply by Michael Blase on February 26, 2016 at 12:35am

Hi,

I wrote a Grasshopper script to do this. The only caveat is that it may only work on corners aligned to the X or Y axis.

I'd really like to write a Python script. I wish there was a good reference manual for it. Something like the Unix manual pages or good O'Reilly reference manual. (Not for the python, but for the McNeel rhinoscriptsytax portion.)

Michael

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