CGAL users discussion list

["魏华祎(Wei, Huayi)" <>]

Hi, Sebastien,

Thanks for your reply, which can solve my problem.

Best

Huayi

On Fri 21 Feb 2014 07:11:13 PM CST, Sebastien Loriot (GeometryFactory) 
wrote:
> Even if it is not obvious from its name, you can use the
> Polyhedron_incremental_builder_3 with a HalfedgeDS:
> http://doc.cgal.org/latest/Polyhedron/classCGAL_1_1Polyhedron__incremental__builder__3.html
>
>
> In this file:
> https://code.google.com/p/cgal-bindings/source/browse/SWIG_CGAL/HalfedgeDS/General_modifier.h
>
>
> there is such a use.
>
> A good HDS typedef to start is:
>
> typedef CGAL::HalfedgeDS_default<CGAL::Simple_cartesian<double> > HDS;
>
>
> HTH,
>
> Sebastien.
>
>
> On 02/21/2014 09:50 AM, "魏华祎(Wei, Huayi)" wrote:
> > Hi, There,
> >
> > I have a 2D quad mesh and want to use halfedge data structure in CGAL to
> > store it .  But I can't find such an example in CGAL.
> >
> > Please give me a example or some suggestion to do it, thanks very much.
> >
> > Here is simple quad mesh:
> >
> > node
> > #   x      y
> > 1  0.0   0.0
> > 2  1.0   0.0
> > 3  2.0   0.0
> > 4  0.0   1.0
> > 5  1.0   1.0
> > 6  2.0   1.0
> > 7  0.0   2.0
> > 8  1.0   2.0
> > 9  2.0   2.0
> >
> > elem
> > #   n1   n2   n3   n4
> > 1    1     2     5     4
> > 2    2     3     6     5
> > 3    4     5     8     7
> > 4    5     6     9     8
> >
> >
> > Best
> >
> > Huayi