Arrangement_2: Add types and functions to become a FaceGraph

[afabri]

Partial fix for Issue #1004

The conversion between edges and halfeges is lacking.

[lrineau]

Is this PR finished? What does it add actually?

[afabri]

It is not finished and I better had marked it as WIP.
The goal is to make Arrangements model of FaceGraph, but honestly I do not even know which algorithm one might run on an arrangement. Also I am not sure what to do with holes, edges with the same face on both sides, isolated points....

[efifogel]

The following make sense and is useful:

| Graph Vertices | Graph Edges | Name

1 | Arr Vertices | Arr Edges | primary
2 | Arr Faces | Arr Edges | Dual
3 | Arr vertices, Edges, & Faces | Incidence relations | Complete

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On Fri, Nov 18, 2016 at 11:31 AM, Andreas Fabri notifications@github.com
wrote:

It is not finished and I better had marked it as WIP.
The goal is to make Arrangements model of FaceGraph, but honestly I do not
even know which algorithm one might run on an arrangement. Also I am not
sure what to do with holes, edges with the same face on both sides,
isolated points....

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[lrineau]

@afabri @efifogel What is the status of this PR? It was left unmodified for a long time.

[efifogel]

I'm not (directly) involved with the development of this feature.

…

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On 30 May 2017 at 15:51, Laurent Rineau ***@***.***> wrote: @afabri <https://github.com/afabri> @efifogel <https://github.com/efifogel> What is the status of this PR? It was left unmodified for a long time. — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub <#1694 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AGoWuHBpP9a4pDhEuqppOkSEsk4w7brTks5r_BDXgaJpZM4KyvcH> .

[lrineau]

Then @afabri, can you comment?

[sloriot]

@afabri, I suggest we close this PR.

[lrineau]

More than two years old... I close the pull-request.