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Full Version: Joined Surface that should be a Solid

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From: fcwilt
22 Mar   [#9] In reply to [#8]
Michael,

You are the best, the VERY best.

I should buy several dozen licenses from you as a way of saying "thanks". Not sure what the wife would say.

Frederick
From: fcwilt
22 Mar   [#10] In reply to [#8]
I forgot to ask.

So two faces can share an single edge OR two faces have edges that, not sure how to put this, exist in the exactly the same space?

I'm guessing a face must be, for lack of the correct term, "enclosed" by edges?

Frederick
From: Michael Gibson
22 Mar   [#11] In reply to [#10]
Hi Frederick,

re:
> So two faces can share an single edge OR two faces have edges that, not sure how to
> put this, exist in the exactly the same space?

Yup, that's correct. There can be one common shared edge between two faces. This is called a "joined edge" and to have a solid you want to have all edges be in this state.

If two faces are touching at an edge but it isn't joined, then there are 2 separate "naked" edges there that are coincident.


> I'm guessing a face must be, for lack of the correct term, "enclosed" by edges?

Yes, a face has "trim boundaries" (or "loops") on it. Each loop consists of one or more edges forming a closed outline.

A face can have one "outer loop" and any number of "inner loops" making holes.


- Michael

Image Attachments:
trimmed_face.png 


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