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
48
49
50
51
52
53
54
55
56
57
|
//! \file examples/Arrangement_on_surface_2/global_insertion.cpp
// Using the global insertion functions (incremental and aggregated).
#include <CGAL/Cartesian.h>
#include <CGAL/Quotient.h>
#include <CGAL/MP_Float.h>
#include <CGAL/Arr_segment_traits_2.h>
#include <CGAL/Arrangement_2.h>
#include <CGAL/Arr_naive_point_location.h>
#include "arr_print.h"
typedef CGAL::Quotient<CGAL::MP_Float> Number_type;
typedef CGAL::Cartesian<Number_type> Kernel;
typedef CGAL::Arr_segment_traits_2<Kernel> Traits_2;
typedef Traits_2::Point_2 Point_2;
typedef Traits_2::X_monotone_curve_2 Segment_2;
typedef CGAL::Arrangement_2<Traits_2> Arrangement_2;
typedef CGAL::Arr_naive_point_location<Arrangement_2> Naive_pl;
int main ()
{
// Construct the arrangement of five intersecting segments.
Arrangement_2 arr;
Segment_2 S1 [5];
S1[0] = Segment_2 (Point_2 (1, 2.5), Point_2 (4, 5));
S1[1] = Segment_2 (Point_2 (1, 2.5), Point_2 (6, 2.5));
S1[2] = Segment_2 (Point_2 (1, 2.5), Point_2 (4, 0));
S1[3] = Segment_2 (Point_2 (4, 5), Point_2 (6, 2.5));
S1[4] = Segment_2 (Point_2 (4, 0), Point_2 (6, 2.5));
insert_non_intersecting_curves (arr, S1, S1 + 5);
// Perform an incremental insertion of a single overlapping segment.
Naive_pl pl (arr);
insert (arr, Segment_2 (Point_2 (0, 2.5), Point_2 (4, 2.5)), pl);
// Aggregately insert an additional set of five segments.
Segment_2 S2 [5];
S2[0] = Segment_2 (Point_2 (0, 4), Point_2 (6, 5));
S2[1] = Segment_2 (Point_2 (0, 3), Point_2 (6, 4));
S2[2] = Segment_2 (Point_2 (0, 2), Point_2 (6, 1));
S2[3] = Segment_2 (Point_2 (0, 1), Point_2 (6, 0));
S2[4] = Segment_2 (Point_2 (6, 1), Point_2 (6, 4));
insert (arr, S2, S2 + 5);
// Print the size of the arrangement.
std::cout << "The arrangement size:" << std::endl
<< " V = " << arr.number_of_vertices()
<< ", E = " << arr.number_of_edges()
<< ", F = " << arr.number_of_faces() << std::endl;
return 0;
}
|
