CGAL users discussion list

["Sebastien Loriot (GeometryFactory)" <>]

On your side this time:

The class Fixed_alpha_shape_3 needs vertex and cell to be model of
FixedAlphaShapeVertex_3 and FixedAlphaShapeCell_3.

You can use CGAL::Fixed_alpha_shape_vertex_base_3<Gt> and
CGAL::Fixed_alpha_shape_cell_base_3<Gt>.

Sebastien.


On 08/05/2013 05:05 PM, rcasero wrote:
> On 5 August 2013 15:49, Sebastien Loriot (GeometryFactory) [via
> cgal-discuss] <[hidden email]
> </user/SendEmail.jtp?type=node&node=4657887&i=0>> wrote:
>
>     On 08/05/2013 04:33 PM, rcasero wrote:
>
>      >
>      > (As a side note, I haven't noticed a speed improvement with the
>     400,000
>      > point example).
>
>     for the location or the insertion?
>
>
>
> For the CgalAlphaShape3.cpp function overall, which reads the list of
> points from Matlab, then builds the Delaunay triangulation, then the
> alpha shape, then extracts the triangulation for a particular alpha
> value (~48 sec on my machine all together).
>
> Checking the documentation, it seems that it'll be faster using
> a Fixed_alpha_shape_3 for a single value of alpha.
>
> I have modified the function adding
>
> typedef CGAL::Fixed_alpha_shape_3<Delaunay>          Fixed_alpha_shape_3;
> ...
>    Fixed_alpha_shape_3 as2(delaunay, 0.0);
>
> (I'm not doing anything to as2 so far, only trying to create the object).
>
> But there's a compilation error "has no member named ‘is_on_chull’". Is
> this a bug like before?
>
> Full error attached.
>
> Best regards,
>
> Ramon.
>
> --
> Dr. Ramón Casero Cañas
>
> Oxford e-Research Centre (OeRC)
> University of Oxford
> 7 Keble Rd
> Oxford OX1 3QG
>
> tlf     +44 (0) 1865 610739
> web http://www.cs.ox.ac.uk/people/Ramon.CaseroCanas
> photos http://www.flickr.com/photos/rcasero/
>
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> shape
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