CGAL users discussion list

[Sylvain Pion <>]

 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.

> 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/

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