CGAL users discussion list

[Andreas Fabri <>]

On 30/03/2010 07:00, 

 wrote:
> Hi,
> I have included CGAL into my application and successfully executed the two
> examples in :
> http://www.cgal.org/Manual/last/doc_html/cgal_manual/Surface_mesher/Chapter_main.html
> My application is a NURBS surface modeler. My application can query any Nurb
> surface with a ray and return the intersection (if one exists).  I understand
> this is the only requirement for the CGAL library to mesh the surface? However
> i do not understand how to configure the CGAL oracle so that it uses my NURBS
> surface ray intersection to generate the points for the mesh?
> Is it possible to post some code showing more generic use of the surface
> meshing functionality? (i.e not implicit or gray level image surfaces)
> Thanks in advance for any assistance,
> Dougal


Hi Dougal,

Concerning the surface mesh generator for Nurbs the best
would be to get inspired by the remesher of polyhedral surfaces

http://www.cgal.org/Manual/last/doc_html/cgal_manual/Surface_mesher/Chapter_main.html#Section_46.6

Codewise this means to have a look at
CGAL-3.6/demo/Polyhedron/Polyhedron_demo_remeshing_plugin_cgal_code.cpp


Note that the mesh generator doesn't do a perfect job yet
when you have sharp features.  This is something we work
on for the case of polyhedral surfaces.

best regards,

andreas fabri