Added example for splitter worst cases

Spatial_searching/examples/Spatial_searching/splitter_worst_cases.cpp

@@ -0,0 +1,49 @@
+#include <CGAL/Simple_cartesian.h>
+#include <CGAL/Orthogonal_k_neighbor_search.h>
+#include <CGAL/Search_traits_2.h>
+
+typedef CGAL::Simple_cartesian<double>                Kernel;
+typedef CGAL::Search_traits_2<Kernel>                 Traits_2;
+typedef Kernel::Point_2                               Point_2;
+typedef CGAL::Sliding_midpoint<Traits_2>              Sliding_midpoint;
+typedef CGAL::Median_of_rectangle<Traits_2>           Median_of_rectangle;
+typedef CGAL::Euclidean_distance<Traits_2>            Distance;
+typedef CGAL::Orthogonal_k_neighbor_search<Traits_2,Distance,Sliding_midpoint>     Neighbor_search_sliding;
+typedef CGAL::Orthogonal_k_neighbor_search<Traits_2,Distance,Median_of_rectangle>  Neighbor_search_median;
+typedef Neighbor_search_sliding::Tree                 Tree_sliding;
+typedef Neighbor_search_median::Tree                  Tree_median;
+
+typedef std::vector<Point_2>                          Points;
+
+int main()
+{
+  Points sliding_worst_case;
+  for (int i = 0 ,j = 1; i < 10 ; ++i , j *= 2){
+    sliding_worst_case.push_back(Point_2(((double)i)/10 , 0));
+    sliding_worst_case.push_back(Point_2( (double)j , 0));    
+  }
+
+  Sliding_midpoint sliding(10);
+  Tree_sliding tree1(sliding_worst_case.begin(), sliding_worst_case.end() , sliding);
+  tree1.build();
+
+  std::cout << "Worst case tree for Sliding midpoint and Midpoint of max spread : "<<std::endl;
+  tree1.statistics(std::cout);
+  tree1.clear();
+
+  Points median_worst_case;
+  for(int i = 0 ; i < 19 ; ++i){
+    median_worst_case.push_back(Point_2( 0 , i));
+  }
+  median_worst_case.push_back(Point_2(20,0));
+
+  Median_of_rectangle median(10);
+  Tree_median tree2(median_worst_case.begin() , median_worst_case.end() , median);
+
+  tree2.build();
+  std::cout <<std::endl<< "Worst case tree for Median of rectangle, Median of max spread : "<<std::endl;
+  tree2.statistics(std::cout);
+  tree2.clear();
+
+  return 0;
+}