CGAL users discussion list

Dear all,

I am very New to CGAL.
Now I have two questions on the 3D surface mesher in Chapter 30 of 
CGAL user and reference manual.

1) How can we get information to create the same figure in the section 3 of 
the chapter 30? 
   I can get the vertex information like
   
-------------------------------------------------------------------------------
     
   Tr::Finite_vertices_iterator it;
   for(it = tr.finite_vertices_begin(); it != tr.finite_vertices_end(); ++it)
       fout << *it << std::endl;
   
-------------------------------------------------------------------------------
    
   But I don't know how to extract information on the triangulation patch    
   connectivity.

2) Can we use our own points on a surface instead of an implicit surface in 
the   
   same example?
 
Thank you very much in advance.