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["Laurent Rineau (GeometryFactory)" <>]

On Wednesday 16 December 2009 18:04:56 Ramin H wrote:
> I looked at Mesh_criteria_3.h, Mesh_facet_criteria_3.h and
> Mesh_cell_criteria_3.h. As far as I understand, these are the default
> meshing criteria defined in CGAL package for Mesh_3 process.
> 
> This is how Mesh_cell_criteria_3's constructor looks like:
> Mesh_cell_criteria_3(const FT& radius_edge_bound,
>                        const FT& radius_bound)
> 
> so, we realize that radius_edge_bound and radius_bound are functors.

No they are not functors! They are a const reference to a FT (field type). 
With most CGAL kernels, "FT" is equal to "double".

> Now, going back to
> CGAL-3.5/examples/Mesh_3/mesh_polyhedral_domain.cpp, is it possible to
> define the following and expect this to just work?
> 
> typedef K::FT FT;
> typedef FT (Function)(const Point&);
> 
> FT function_1 (const Point& p)
> {
>   const FT x1=p.x();
>   const FT y1=p.y();
>   const FT z1=p.z();
>   return x1+y1+z1+1;
> }

Be careful with that example: that size field is zero along the plane of 
equation x+y+z-1=0, and is negative on the negative size of that plane!

> and then in main.cpp,
> int main()
> {
>   // ...
>   Cell_criteria cell_criteria(function_1, 0.2);
>   // ...
> }
> 
> I appreciate your feedback.

No, that is not possible as-is. You need to define your own model of the 
concept MeshCriteria_3.

-- 
Laurent Rineau, PhD
R&D Engineer at GeometryFactory           http://www.geometryfactory.com/
Release Manager of the CGAL Project       http://www.cgal.org/