CGAL 6.2 - 2D Triangulations: Triangulation_2/for_loop_2.cpp

CGAL 6.2 - 2D Triangulations

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Triangulation_2/for_loop_2.cpp
#include <CGAL/Exact_predicates_inexact_constructions_kernel.h>
#include <CGAL/Triangulation_2.h>
#include <iostream>
#include <vector>
typedef CGAL::Exact_predicates_inexact_constructions_kernel K;
typedef CGAL::Triangulation_2<K> Triangulation;
typedef Triangulation::Vertex_handle Vertex_handle;
typedef Triangulation::Point Point;
typedef Triangulation::Finite_vertex_handles Finite_vertex_handles;
// The following types are different
// Its value type is Triangulation_2::Vertex
typedef Triangulation::Finite_vertices_iterator Finite_vertices_iterator;
// Its value type is Triangulation_2::Vertex_handle
typedef Finite_vertex_handles::iterator Finite_vertex_handles_iterator;
int main()
{
std::vector<Point> points = { Point(0,0), Point(1,0), Point(0,1) };
Triangulation T;
T. insert(points.begin(), points.end());
std::cout << "Triangulation_2::Finite_vertices_iterator is like a Triangulation_2::Vertex_handle\n";
for(Finite_vertices_iterator it = T.finite_vertices_begin();
it != T.finite_vertices_end();
++it){
std::cout << it->point() << std::endl;
}
std::cout << "Triangulation_2::Finite_vertex_handles::iterator dereferences to Triangulation_2::Vertex_handle\n";
Finite_vertex_handles::iterator b, e;
std::tie(b,e) = T.finite_vertex_handles();
for(; b!=e; ++b){
Vertex_handle vh = *b; // you must dereference the iterator to get a handle
std::cout << vh->point() << std::endl;
}
std::cout << "and you can use a C++11 for loop\n";
for(Vertex_handle vh : T.finite_vertex_handles()){
std::cout << vh->point() << std::endl;
}
return 0;
}
CGAL::Exact_predicates_inexact_constructions_kernel
CGAL::Triangulation_2
The class Triangulation_2 is the basic class designed to handle triangulations of set of points in t...
Definition: Triangulation_2.h:170
CGAL::Triangulation_2::insert
Vertex_handle insert(const Point &p, Face_handle f=Face_handle())
inserts point p in the triangulation and returns the corresponding vertex.