Hi, I'm using Triangulation_cell_base_with_info_3 so that I can augment cells

with more information, but reading the manual, it says:

"It provides an easy way to add some user defined information in cells. Note

that input/output operators discard this additional information."

This statement confuses me, as if input/output iterators discard this

additional information, does that mean I cannot access the extra information

when I am using Triangulation_cell_base_with_info_3 with for example a

hierarchical delaunay triangulation (as below)?

Setup:

typedef CGAL::Exact_predicates_inexact_constructions_kernel J;

typedef CGAL::Triangulation_cell_base_with_info_3<TetraInfo, J> Cb;

typedef CGAL::Triangulation_vertex_base_3<J> Vb;

typedef CGAL::Triangulation_hierarchy_vertex_base_3<Vb> Vbh;

typedef CGAL::Triangulation_data_structure_3<Vbh, Cb> Tds_info;

typedef CGAL::Delaunay_triangulation_3<J,Tds_info> Dt_info;

typedef CGAL::Triangulation_hierarchy_3<Dt_info> Dh_info;

typedef Dh_info::Finite_vertices_iterator Finite_vertices_iteratorI;

typedef Dh_info::Finite_cells_iterator Finite_cells_iteratorI;

typedef Dh_info::Vertex_handle Vertex_handleI;

typedef Dh_info::Point PointI;

typedef Dh_info::Cell CellI;

Code:

//create triangulation

Dh_info dti;

//populate with points

for (int i=0; i<vertex_positionsI.size(); ++i)

{

dti.insert(vertex_positionsI[i]);

}

//output in geomview to confirm triangulation is successful

gv<<dti;

for (Finite_cells_iteratorI fit=dti.finite_cells_begin();

fit!=dti.finite_cells_end();++fit)

{

cout<<(*fit).info.in_model<<endl; <------compile error here

}

Compile error:

[something really long] does not have class type

Tetrainfo, my info class, is just a simple class:

class TetraInfo{

public:

TetraInfo();

bool in_model;

};

Can I simply not access my additional information through this method?

If not, how can I access my additional information?

Thanks for your help,

Qi

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