CGAL 4.7 - 2D Triangulation: Triangulation_2/adding_handles.cpp

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CGAL 4.7 - 2D Triangulation

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Triangulation_2/adding_handles.cpp
#include <CGAL/Exact_predicates_inexact_constructions_kernel.h>
#include <CGAL/Triangulation_2.h>
#include <cassert>
/* A vertex class with an additionnal handle */
template < class Gt, class Vb = CGAL::Triangulation_vertex_base_2<Gt> >
class My_vertex_base
: public Vb
{
typedef Vb Base;
public:
typedef typename Vb::Vertex_handle Vertex_handle;
typedef typename Vb::Face_handle Face_handle;
typedef typename Vb::Point Point;
template < typename TDS2 >
struct Rebind_TDS {
typedef typename Vb::template Rebind_TDS<TDS2>::Other Vb2;
typedef My_vertex_base<Gt,Vb2> Other;
};
private:
Vertex_handle va_;
public:
My_vertex_base() : Base() {}
My_vertex_base(const Point & p) : Base(p) {}
My_vertex_base(const Point & p, Face_handle f) : Base(f,p) {}
My_vertex_base(Face_handle f) : Base(f) {}
void set_associated_vertex(Vertex_handle va) { va_ = va;}
Vertex_handle get_associated_vertex() {return va_ ; }
};
typedef CGAL::Exact_predicates_inexact_constructions_kernel K;
typedef My_vertex_base<K> Vb;
typedef CGAL::Triangulation_data_structure_2<Vb> Tds;
typedef CGAL::Triangulation_2<K,Tds> Triangulation;
typedef Triangulation::Vertex_handle Vertex_handle;
typedef Triangulation::Finite_faces_iterator Finite_faces_iterator;
typedef Triangulation::Point Point;
int main() {
Triangulation t;
Vertex_handle v0 = t. insert(Point(0,1));
Vertex_handle v1 = t.insert(Point(0,0));
Vertex_handle v2 = t.insert(Point(2,0));
Vertex_handle v3 = t.insert(Point(2,2));
// associate vertices as you like
v0->set_associated_vertex(v1);
v1->set_associated_vertex(v2);
v2->set_associated_vertex(v3);
v3->set_associated_vertex(v0);
assert( v0->get_associated_vertex() == v1);
return 0;
}