CGAL users discussion list

[Shankar Kulumani <>]

I believe that when you build the mesh you'll want to store some of the ids along with the other face/vertex information.

Here's an example using the Polyhedron class but I think others are similar

typedef CGAL::Polyhedron_3<Kernel, CGAL::Polyhedron_items_with_id_3> Polyhedron;
typedef Polyhedron::Facet_iterator Facet_iterator;
typedef Polyhedron::Vertex_iterator Vertex_iterator;


void build_polyhedron_index(Polyhedron &P) {
std::size_t ii = 0;
for (Vertex_iterator vert = P.vertices_begin(); vert != P.vertices_end(); ++vert) {
vert->id() = ii++;
}
ii = 0; // reset the counter
for (Facet_iterator facet = P.facets_begin(); facet != P.facets_end(); ++facet) {
facet->id() = ii++;
}
}

On Thu, Apr 19, 2018 at 8:37 PM, theidleman <> wrote:

I test several examples by using example mesh. The result is good. But when I
open the mesh file, I found the face in the mesh between input and result is
very different.

For example,

Input:
First three lines of face information.
3 170 169 218
3 304 259 871
3 299 298 8

Result:
First three lines of face information.
3 921 914 901
3 901 914 885
3 883 885 914

What I want is to change the face of the result as same as the input.

How can I deal with it?
Thank you very much.



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