src/Subsampling/test/test_sparsify_point_set.cpp


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

// #ifdef _DEBUG
// # define TBB_USE_THREADING_TOOL
// #endif

#define BOOST_TEST_DYN_LINK
#define BOOST_TEST_MODULE Subsampling - test sparsify_point_set
#include <boost/test/unit_test.hpp>

#include <gudhi/sparsify_point_set.h>

#include <CGAL/Epick_d.h>
#include <CGAL/Random.h>

#include <array>
#include <vector>
#include <iterator>

BOOST_AUTO_TEST_CASE(test_sparsify_point_set) 
{
  typedef CGAL::Epick_d<CGAL::Dimension_tag<4> >   K;
  typedef typename K::FT                           FT;
  typedef typename K::Point_d                      Point_d;
  
  CGAL::Random rd;

  std::vector<Point_d> points;
  for (int i = 0 ; i < 500 ; ++i)
    points.push_back(Point_d(std::array<FT,4>({rd.get_double(-1.,1),rd.get_double(-1.,1),rd.get_double(-1.,1),rd.get_double(-1.,1)})));

  K k;
  std::vector<Point_d> results;
  Gudhi::subsampling::sparsify_point_set(k, points, 0.5, std::back_inserter(results));
  std::cout << "Before sparsification: " << points.size() << " points.\n";
  std::cout << "After  sparsification: " << results.size() << " points.\n";
  //for (auto p : results)
  //  std::cout << p << "\n";

  BOOST_CHECK(points.size() > results.size());
}