Add example

git-svn-id: svn+ssh://scm.gforge.inria.fr/svnroot/gudhi/branches/subsampling_and_spatialsearching@1351 636b058d-ea47-450e-bf9e-a15bfbe3eedb

Former-commit-id: 2b99baa9a43854119a46ec8ce11b93f00ef74835

1 files changed, 37 insertions, 0 deletions

diff --git a/src/Spatial_searching/example/example_spatial_searching.cpp b/src/Spatial_searching/example/example_spatial_searching.cpp
new file mode 100644
index 00000000..ba387b71
--- /dev/null
+++ b/src/Spatial_searching/example/example_spatial_searching.cpp
@@ -0,0 +1,37 @@
+#include <gudhi/Spatial_tree_data_structure.h>
+
+#include <CGAL/Epick_d.h>
+#include <CGAL/Random.h>
+
+#include <array>
+#include <vector>
+
+namespace gss = Gudhi::spatial_searching;
+
+int main (void)
+{
+  typedef CGAL::Epick_d<CGAL::Dimension_tag<4> >      K;
+  typedef typename K::FT                              FT;
+  typedef typename K::Point_d                         Point;
+  typedef std::vector<Point>                          Points;
+
+  typedef gss::Spatial_tree_data_structure<K, Points> Points_ds;
+  typedef typename Points_ds::KNS_range               KNS_range;
+  typedef typename Points_ds::KNS_iterator            KNS_iterator;
+  typedef typename Points_ds::INS_range               INS_range;
+  typedef typename Points_ds::INS_iterator            INS_iterator;
+
+  CGAL::Random rd;
+
+  Points points;
+  for (int i = 0; i < 500; ++i)
+    points.push_back(Point(std::array<FT, 4>({ rd.get_double(-1.,1),rd.get_double(-1.,1),rd.get_double(-1.,1),rd.get_double(-1.,1) })));
+
+  Points_ds points_ds(points);
+
+  auto kns_range = points_ds.query_ANN(points[20], 10, true);
+  for (auto const& nghb : kns_range)
+    std::cout << nghb.first << " (sq. dist. = " << nghb.second << ")\n";
+
+  return 0;
+}