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[Zohar <>]

It worked; thanks!


typedef Polyhedron_3 EP_base;

bool is_manifold(EP_base &mesh)
{
        // count border edges (vertex halfedge circulator doesn't work on
non-manifold).
        vector<int> nBorder(mesh.size_of_vertices(), 0);
    for ( EP_base::Halfedge_const_iterator he = mesh.halfedges_begin() ; he
!= mesh.halfedges_end() ; he++ ) {
                if ( !he->is_border() )
                        continue;
                int v1 = he->vertex()->index();
                int v2 = he->opposite()->vertex()->index();
                nBorder[v1]++;
                nBorder[v2]++;
                if ( nBorder[v1] > 2 || nBorder[v2] > 2 )
                        return false;
        }

        return true;
}




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