1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
|
#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;
}
|
