CGAL users discussion list

[Marco Feder <>]

Thanks for your prompt replies. As Andreas said, that solution would imply a change in the source code of the library, which is something I’d like to avoid. The simplest solution I have with inheritance is the following:

struct myPoint : public CGAL_Point{

myPoint(const dealii::Point<2>& p) : CGAL_Point{p[0],p[1]}{}

};

Where typedef Polygon::Point_2 CGAL_Point; is the CGAL type, dealii::Point<2>& p is the one coming from the FEM library. This is working, even if is not nice.

What CGAL packages do you want to use it with?

I am using the packages “2D polygons” and “2D Conforming Triangulation and meshes”. 

What kernel do you use?

I am using CGAL::Exact_predicates_exact_constructions_kernel  for the Polygon

And CGAL::Exact_predicates_inexact_constructions_kernel in the CDT

Best,

Marco

On 4 Mar 2022, at 10:55, Andreas Fabri <> wrote:

Hello,

Marco HAS already a given point class so derivation is not a possible solution.

What is your point type like Marco?
What CGAL packages do you want to use it with?
What kernel do you use?

Best,

Andreas

On 3/4/2022 10:50 AM, Carlos Rabelo ( via cgal-discuss Mailing List) wrote:

">

Why dont you use inheritance:

Class MyPoint : public CGAL_Point

{

   your members...

}

Carlos

Em sexta-feira, 4 de março de 2022 06:40:45 GMT-3, Marco Feder escreveu:

Dear all,

I'm using CGAL inside a finite element library, which of course has its

own 'Point' class. Every time I need to use the CGAL interface, I need

to convert a 'Point' object to a 'CGAL_Point' object, and so far I'm

doing this manually by working with the coordinates. I find this really

annoying as this is also really error-prone, so I'd like to know if

there's a clever way to "teach" how to construct a 'CGAL_Point' out of a

general 'Point' once and for all.

Best regards,

Marco

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Andreas Fabri, PhD
Chief Officer, GeometryFactory
Editor, The CGAL Project

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