CGAL users discussion list

[Laurent Rineau <>]

On Tuesday 24 June 2008 12:24:34 Hui Ding wrote:
> Hi,
>
> Since I made my implicit function, I got an
> "Surface_mesh_default_triangulation_3" which I named it "tr". My question
> is: Is there anyway to return only the facets or vertices of the surface?
> Thanks a lot.

Use the 2D complex in 3D triangulation. The variable is probably named c2t3. 
The documentation is here:
http://www.cgal.org/Manual/3.3/doc_html/cgal_manual/Surface_mesher_ref/Concept_SurfaceMeshComplex_2InTriangulation_3.html

A facet f is on the surface iff c2t3.face_status(f)!=NOT_IN_COMPLEX. If you 
want to iterate of facets of the surface, you can use the sequence
  c2t3.facets_begin(), c2t3.facets_end()
The iterators have type Facet_iterator (defined in the C2T3).

-- 
Laurent Rineau, PhD
Engineer at GeometryFactory
http://www.geometryfactory.com/