CGAL users discussion list

[Olivier Devillers <>]

Le 6/24/14 5:18 PM, colonel_panic a écrit :
> Hi,
>
> I am looking for a way to remove cells, facets and edges from a 3d
> triangulation using CGAL.  There are functions provided to remove vertices
> but I would like to keep all of the vertices and do not want to
> retriangulate them.
> It is possible to add a boolean flag in the cell base class to indicate
> whether it should be removed but because edges and facets are not explicitly
> or uniquely represented i am having difficulty finding a way to remove them
> from the triangulation.
> Is there a way to remove facets and edges from the triangulation?

I do not know why you wnat such an operation,
in the internal representation there are cells and vertices, so the 
edges (and facets)
are just the edges of the cells, you cannot remove edges without 
removing cells.
And removing cells is not a good idea since you no longer have a valid 
triangulation.

May be, you could be happy by  "marking"the edges or facets as inactive.