blob: fc0e2460b71ffa79d1449bdaf8af236c0e6ae396 (
plain)
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
58
59
60
61
62
63
64
65
66
67
68
69
70
71
|
// to construct a Delaunay_triangulation from a OFF file
#include "gudhi/Delaunay_triangulation_off_io.h"
#include "gudhi/Alpha_complex.h"
#include <CGAL/Delaunay_triangulation.h>
#include <CGAL/Epick_d.h>
#include <stdio.h>
#include <stdlib.h>
#include <string>
typedef CGAL::Epick_d< CGAL::Dynamic_dimension_tag > Kernel;
typedef Kernel::Point_d Point;
typedef std::vector<Point> Vector_of_points;
int main(int argc, char **argv) {
// ----------------------------------------------------------------------------
// Init of a list of points
// ----------------------------------------------------------------------------
Vector_of_points points;
std::vector<double> coords;
coords.clear();
coords.push_back(0.0);
coords.push_back(0.0);
coords.push_back(0.0);
coords.push_back(1.0);
points.push_back(Point(coords.begin(), coords.end()));
coords.clear();
coords.push_back(0.0);
coords.push_back(0.0);
coords.push_back(1.0);
coords.push_back(0.0);
points.push_back(Point(coords.begin(), coords.end()));
coords.clear();
coords.push_back(0.0);
coords.push_back(1.0);
coords.push_back(0.0);
coords.push_back(0.0);
points.push_back(Point(coords.begin(), coords.end()));
coords.clear();
coords.push_back(1.0);
coords.push_back(0.0);
coords.push_back(0.0);
coords.push_back(0.0);
points.push_back(Point(coords.begin(), coords.end()));
// ----------------------------------------------------------------------------
// Init of an alpha complex from the list of points
// ----------------------------------------------------------------------------
Gudhi::alphacomplex::Alpha_complex alpha_complex_from_points(3, points.size(), points.begin(), points.end());
// ----------------------------------------------------------------------------
// Display information about the alpha complex
// ----------------------------------------------------------------------------
std::cout << "Alpha complex is of dimension " << alpha_complex_from_points.dimension() <<
" - " << alpha_complex_from_points.num_simplices() << " simplices - " <<
alpha_complex_from_points.num_vertices() << " vertices." << std::endl;
std::cout << "Iterator on alpha complex simplices in the filtration order, with [filtration value]:" << std::endl;
for (auto f_simplex : alpha_complex_from_points.filtration_simplex_range()) {
std::cout << " ( ";
for (auto vertex : alpha_complex_from_points.simplex_vertex_range(f_simplex)) {
std::cout << vertex << " ";
}
std::cout << ") -> " << "[" << alpha_complex_from_points.filtration(f_simplex) << "] ";
std::cout << std::endl;
}
return 0;
}
|