Merged last trunk modifications

Make Witness compile and test


git-svn-id: svn+ssh://scm.gforge.inria.fr/svnroot/gudhi/branches/rips_complex_module@1755 636b058d-ea47-450e-bf9e-a15bfbe3eedb

Former-commit-id: e6eec55ac0a4cc66da3bb081a222cae5b998c1cf

1 files changed, 27 insertions, 0 deletions

diff --git a/src/Subsampling/example/example_choose_n_farthest_points.cpp b/src/Subsampling/example/example_choose_n_farthest_points.cpp
new file mode 100644
index 00000000..533aba74
--- /dev/null
+++ b/src/Subsampling/example/example_choose_n_farthest_points.cpp
@@ -0,0 +1,27 @@
+#include <gudhi/choose_n_farthest_points.h>
+
+#include <CGAL/Epick_d.h>
+#include <CGAL/Random.h>
+
+#include <vector>
+#include <iterator>
+
+int main(void) {
+  typedef CGAL::Epick_d<CGAL::Dimension_tag<4> > K;
+  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(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::choose_n_farthest_points(k, points, 100, std::back_inserter(results));
+  std::cout << "Before sparsification: " << points.size() << " points.\n";
+  std::cout << "After  sparsification: " << results.size() << " points.\n";
+
+  return 0;
+}