CGAL users discussion list

[Mariette Yvinec <>]

Hi  Fabio

the Mesh_3 demo shows the histogram of dihedral angles in the mesh to 
let you
"experience" the efficiency of the various mesh optimizers.
However it is only a demo and does not give you access to other statistics
about the mesh. Also  the demo  has no manual.

However the mesh_3 package itself has a full fledge user and reference 
manual
that explain how you may access to the generated mesh
and scan it to extract whatever statistics you would like.

About the original boundaries,
I guess you refer to the fact that sharp edges in the boundaries of the 
domain are not
accurately represented in the mesh.
Actually the handling of sharp edges of domain boundaries is a feature 
that is supported by
Mesh_3 package since the last public release 3.8, but does not yet appear
in the demo.


Le 06/06/11 04:17, Fabio Casado Ruiz a écrit :
> Hi everyone,
> I'm trying to make some comparisons between meshes generated using both 
> TetGen as CGAL. Tetgen statistics for generated meshes are pretty detailed, 
> but for CGAL (and I must admit that because of time issued I'm only using the 
> Mesh_3 demo) there are a few statistics I dont comprehend fully. Is there a 
> place where the demo, its way of functioning and statistics are explained? 
> I'm interested in facet angles (this are the angles of superficial faces 
> right?), the dihedral angle (these are showned in the diagram at the bottom 
> of the window right?) and the tet. max size (does this size refer to 
> tetrahedral volumes?).
>
> Another issue is the aspect (visually) of final meshes. I've generated a 
> couple, and when I look at them I can see places where the original borders 
> are not included (see example pictures). Is this because CGAL doesnt conform 
> to boundaries????
>
> Please I would appretiate your help a lot .
> Thanks again,
> Fabio.

--
Mariette Yvinec
Geometrica project team
INRIA  Sophia-Antipolis