CGAL users discussion list

[Lauri Lehtovaara <>]

Dear Monique,

Thank you for your quick reply.

Monique Teillaud wrote:
> > Background: I'm trying to build my own 3d mesh generator (for FEM 
> > based electronic structure calculations) on top of CGAL. My earlier 
> > code uses TETGEN, but it's too slow as I have to insert one point at 
> > time when refinining the mesh. (And I prefer using CGAL for other 
> > reasons as well.)
>
> > I wrote a simple test using Delaunay_d<Cartesian_d<double> >, and 
> > everything worked out fine.
>
> You mention 3d mesh generator above. Do you need dimension higher than 3?
Not at the moment, but in future I might do need 4d for time-dependent 
simulations.

> > Problem: Now, I would like to inherit a vertex class and store some 
> > information for the mesh generator (e.g. position of the closest 
> > atom). My question is, what is the proper way to do this? (And should 
> > I inherit vertex class or maybe some other class.)
>
> If you need dimension 3 only, you can use CGAL::Delaunay_triangulation_3.
Yes, I know. The only reason why I chose Delaunay_d was that it had more 
flexible license (LGPL). I'm planning to publish my work under  some 
open source license when it's ready, but QPL is too strict for me.
> The user manual of the 3D triangulations chapter (chapter 31 in the 
> manual of CGAL 3.4) explains you several ways to change the vertex 
> class to add additional information.
I will take a closer look on this chapter.


Thanks once again,

   - Lauri