CGAL users discussion list

[Per Zetterlund <>]

Hi Adam,

I'm didn't test run it on my computer, but

  D3->tds().delete_cell(cit);

compiles for me.

 /Per


On Fri, Nov 7, 2014 at 5:12 AM, Adam Getchell 
<>
 wrote:
> Hello all,
>
> I have a function on a Delaunay triangulation which checks the validity of
> my cells. I want to call TriangulationDataStructure_3::delete_cell(). How do
> I do that?
>
> First, I tried just doing Tds::delete_cell(cit);
>
> But that gives a “call to non-static member function without an object
> argument”.
>
> Next, I tried calling the superclass method from the subclass:
>
> typedef CGAL::Exact_predicates_inexact_constructions_kernel K;
> /// Used so that each timeslice is assigned an integer
> typedef CGAL::Triangulation_3<K>  Triangulation;
> typedef CGAL::Triangulation_vertex_base_with_info_3<unsigned, K> Vb;
> typedef CGAL::Triangulation_data_structure_3<Vb> Tds;
> typedef CGAL::Delaunay_triangulation_3<K, Tds> Delaunay;
> typedef Delaunay::Vertex_handle Vertex_handle;
> typedef Delaunay::Locate_type Locate_type;
> typedef Delaunay::Point Point;
>
> inline bool check_timeslices(Delaunay* D3) {
>   Delaunay::Finite_cells_iterator cit;
>   for(cit = D3->finite_cells_begin();  cit != D3->finite_cells_end(); ++cit)
>   {
>     /// Get the vertices from the cell
>     //Delaunay::Facet& face = *(cit->first);
>     // Vertex_handle vs = cit->source();
>     if (cit->is_valid())
>       {
>         std::cout << "Cell is valid." << std::endl;
>       }
>     else
>       {
>         D3->Tds::delete_cell(cit);
>         std::cout << "Invalid cell destroyed." << std::endl;
>       }
>   }
>   assert(D3->is_valid());
>   return true;
> }
>
> It looks like delete_cell is a private function not callable from
> subclasses. I get:
>
> [ 12%] Building CXX object CMakeFiles/cdt.dir/src/cdt.cpp.o
> In file included from /Users/adam/CDT-plusplus/src/cdt.cpp:22:
> /Users/adam/CDT-plusplus/src/S3Triangulation.h:59:13: error: 'Tds' is a
> private
>       member of 'CGAL::Triangulation_3<CGAL::Epick,
>
> CGAL::Triangulation_data_structure_3<CGAL::Triangulation_vertex_base_with_info_3<unsigned
>       int, CGAL::Epick, CGAL::Triangulation_vertex_base_3<CGAL::Epick,
>       CGAL::Triangulation_ds_vertex_base_3<void> > >,
>       CGAL::Triangulation_ds_cell_base_3<void>, CGAL::Sequential_tag>,
>       CGAL::Default>'
>         D3->Tds::delete_cell(cit);
>             ^
> /usr/local/include/CGAL/Triangulation_3.h:375:83: note: implicitly declared
>       private here
>   ...Triangulation_cell_base_3<GT> > >::type Tds;
>                                              ^
> In file included from /Users/adam/CDT-plusplus/src/cdt.cpp:22:
> /Users/adam/CDT-plusplus/src/S3Triangulation.h:59:18: error:
>
> 'CGAL::Triangulation_data_structure_3<CGAL::Triangulation_vertex_base_with_info_3<unsigned
>       int, CGAL::Epick, CGAL::Triangulation_vertex_base_3<CGAL::Epick,
>       CGAL::Triangulation_ds_vertex_base_3<void> > >,
>       CGAL::Triangulation_ds_cell_base_3<void>,
>       CGAL::Sequential_tag>::delete_cell' is not a member of class
> 'Delaunay'
>       (aka 'Delaunay_triangulation_3<K, Tds>')
>         D3->Tds::delete_cell(cit);
>
>
> Adam Getchell
> about.me/adamgetchell
>