CGAL users discussion list

[Sebastien Loriot <>]

On your side, you could define an API where data returns the different 
critera thanks to member functions. That way when you call Mesh_3,
the named parameter will automatically pick the output of the function,
be it a double or a functor/lambda.

HTH,

Sebastien.

On 6/3/22 14:51, Marco Feder ( via cgal-discuss Mailing 
List) wrote:
> Dear all,
>
> For an application, I need to wrap facet_angle,facet_size,cell_size, 
> etc… into a struct , call it Data, where the user can just do:
>
> Data my_data;
> my_data.cell_size = 0.1
> my_data_radius_edge_ratio = 2.
>
> and so on. In the trivial case where all the parameters are double, as 
> one can simply do:
>
> struct Data{
> double cell_size, cell_radius_edge_ratio;
> };
>
> However, I’m not able to find a solution in case the user may want to 
> use (for instance) a variable cell_size, like in this example 
> (https://doc.cgal.org/latest/Mesh_3/Mesh_3_2mesh_implicit_sphere_variable_size_8cpp-example.html#_a6 
> <https://doc.cgal.org/latest/Mesh_3/Mesh_3_2mesh_implicit_sphere_variable_size_8cpp-example.html#_a6>).
>
> In that case, what will be the type of cell_size in my own struct Data ? 
> I only know it’s a boost named parameter, but I can’t see an elegant way 
> to make both options (double and named parameter) available without 
> hardcoding them.
>
> Best regards,
> Marco
>
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