CGAL users discussion list

[Guillaume Gay <>]

Thanks for the swift answer!

I'll dive into all this.

Best

G.

Le 22/06/2015 11:36, Guillaume Damiand a écrit :
> Hi Guillaume,
>
>
> Le 22/06/2015 10:09, Guillaume Gay a écrit :
> > Hi all,
> >
> > I'm new to CGAL, so apologies in advance if I ask obvious questions.
>
> They are not obvious ;)
>
> > I'm starting to use LinearCellComplex to model biological epitheliums 
> > (those are one cell thick sheets of tissues).
> > I need to attach ids to faces, vertices and edges, as done in 
> > Polyhedron_Items_with_id :
> > http://doc.cgal.org/latest/BGL/classCGAL_1_1Polyhedron__items__with__id__3.html 
> >
> >
> > If I understand correctly, this can be done in the definition of 
> > CellAttributes. 
>
> Yes.
>
> > What I'm unsure of is how one can access the DartHandle of a cell 
> > with a given id latter on, 
>
> Two possibilities:
> * use three std::vector to store the cell attribute handle associated 
> with each id. Then given a cell attribute handle you can obtain one 
> dart of the cell using the dart() method.
> * use the operator[] on cell attribute, for example 
> amap.attributes<1>[5] gives the cell attribute handle<1> numbered 5. 
> Then use the dart() method.
>
>
> > and the correct strategy to make sure ids are unique and no collision 
> > occur.
>
> Instead of associating directly an id to 0, 1 and 2-cells, create your 
> own class containing an id, associate this class to 0-cell and 
> initialize the id of 0-cell in its constructor incrementing a static 
> variable (the same for 1 and 2 cells).
>
> > So my question is: has anybody already coded ids attributes for LCC? 
> > If not, what do you advise?
> > Subsidiary question: I understand ids help interface Polyhedron_3 
> > with  the boost graph library, is this achievable for LCC?
>
> Not yet...
>
> Best
> Guillaume
>
>
> > The code base is here: 
> > https://github.com/CellModels/tyssue/tree/linearcellcomplew.
> >
> > Thank you for your input,
> >
> > Best,
> >
> > Guillaume

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Guillaume Gay, PhD

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