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[Mateus Bellomo <>]

Thanks for the reply Andreas.

If instead of modifying the vertex coordinates, I remove the vertex and its incidents edges and put the vertex back (and it's edges properly updated) with new coordinates?

Do you think that would update the topology?

Em qui, 17 de set de 2015 às 16:53, Andreas fabri <> escreveu:

It is not a functionality of the arrangement to update the topology when you change the geometry

Best,
Andreas


> On 17 sept. 2015, at 21:46, Mateus Bellomo <> wrote:
>
> Hello,
>
> I'm using Arrangement_2 and trying to modify a vertex point but I think the structure it's not updating information correctly.
>
> I have a quadrilateral grid and I want to move some vertices in this grid to make a distortion. After I move the vertex I have to check if some of it's edges have crossed another edge. For that I have checked the circular order of edges of it's neighbours. But even when I made a movement that created crossing edges this circular order is not changing as it would.
>
> Do you know if after using modify_vertex() function the hole Arrangement_2 structure is updated (including circular order of edges in all vertices) accordingly?
>
> Thanks.

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