CGAL users discussion list

[Mariette Yvinec <>]

you may insert  vertices in the triangulation from which you build the c2t3
before launching the Delaunay refinement process.
Those vertices will stay in the mesh.
I quote the manual below :


The Delaunay refinement process is started with an initial set of points which is the union of two sets: the set of vertices in the initial triangulation pointed to by the c2t3 argument and a set of points provided by the traits class. The optional parameter initial_number_of_points allows to monitor the number of points in this second set. (This parameter is passed to the operator() of the constructor object Construct_initial_points in the traits class.) The meshing algorithm requires that the initial set of points includes at least one point on each connected components of the surface to be meshed.


If you don't insert at least one point per connected component,
the mesh may still be ok in the end but it may also happens
that some whole connected components of the level set are missing.

Hope this helps.





Amir Vaxman wrote:

Where do you specify initial points? I saw that Implicit_surface_3<Traits, Function> receives a bounding sphere.

 

From: Mariette Yvinec []
Sent: Monday, June 29, 2009 12:58 PM
To:
Subject: Re: [cgal-discuss] About the surface mesh generator

 

yes, without any problem
The main point is that you should provide initial points
on each connected component if you want to be sure not
to miss one

Amir Vaxman wrote:

I am doing surface mesh generation from an implicit function. The zero level of the function is not necessarily a continuous surface (it can be several smooth closed surfaces). Does the surface mesh generator handle such cases?

 

Amir.

-- 

Mariette Yvinec

Geometrica project team

INRIA  Sophia-Antipolis  

-- 
Mariette Yvinec
Geometrica project team
INRIA  Sophia-Antipolis