CGAL users discussion list

["Leonid Tcherniavski" <>]

On 07/01/2008, Sylvain Pion 
<>
 wrote:
> 
>  a écrit :
> > Please help!
> >
> > I use CGAL on Windows XP with Microsoft Visual Studio 2005.
> >
> > I would like to use the Delaunay_triangulation_3 object as a container of 
> > the vertices, edges, facets and cells.
>
> You may have missed that only vertices and cells are actually stored.
> Facets and edges are only implicit, that is, referenced by a cell with
> 1 or 2 indices.
>

Indeed, thanks!


> > Trying to do so, I created a Triangulation on a vertices which are the 
> > corners of a cube. So far so good.
> >
> > Now the container functionality: I would like to delete one finite cell, 
> > and the cell only by:
> >
> > T->tds().delete_cell(c);
> >
> > where 'T' is a Delaunay_triangulation_3 object and 'c' is a Cell_handle 
> > on an existing cell (T_copy->tds().is_cell(c) is true). I would like to 
> > expect that the rest of the triangulation structure is preserved, but no. 
> > Putting out the numbers, I get one cell less (OK), but also some finite 
> > facets less too (Not OK)!
> >
> > I do understand that such expectation is not really in the sense of the 
> > triangulation functionality, but I do need it!
>
> If you want to manage edges and facets, you need to do that in your own
> code.
>
> --
> Sylvain Pion
> INRIA Sophia-Antipolis
> Geometrica Project-Team
> CGAL, http://cgal.org/
>
>
>