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[Renaud GILLON <>]

Yes, sorry I meant "is_valid()".

Here is a example (using GoogleTest macro's) :

// Create an empty mesh
Triangulation raw_mesh(nbr_dimensions);

// Define the input file
auto filename_input = "delaunay_mesh.txt";
std::ifstream s_in;
s_in.open(filename_input);

// Reload the mesh
s_in >> raw_mesh ;

// Strange fact !
ASSERT_FALSE(raw_mesh.is_valid());

// Clean up by copying to a new mesh
Triangulation this_mesh(raw_mesh);

// Funny work-around for the strange fact.
ASSERT_TRUE(this_mesh.is_valid());

This test succeeds, meaning the raw_mesh.is_valid() returns false, the this_mesh.is_valid() returns true.

The mesh is a simple tetraedron in 3D using the origin and all three unit vectors, created using the stream out operators.

I will check how to place an example in Github.

Renaud

Le jeu. 26 nov. 2020 à 19:36, Marc Glisse <> a écrit :

On Thu, 26 Nov 2020, Renaud GILLON wrote:

> Using the Delaunay_triangulation class with Epick_d kernel, we noticed that
> after streaming the triangulation to a (text) file, closing the file, the
> loading that file back into a new Delaunay_triangulatin object, the
> "invalid" property is set to "true".
>
> When trying to call the locate() function on the triangulation initialized
> from the file, we get "trouble" (error messages). However if we make a copy
> to a third triangulation object using a copy constructor, then the new
> triangulation does not have "invalid" set and it works properly.
>
> Is this a known issue ? Or should I report it as a bug with more detail ?

Opening an issue on github with a simple reproducer would be nice, thanks.
I don't know what "invalid" property you are talking about (grep doesn't
find the string "invalid" in this module).

--
Marc Glisse

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Renaud GILLON SYDELITY "Scaleable Virtual Prototyping" Mobile : +32 (0)495 27 65 65 E-mail : Web: www.sydelity.com