Geometry.Index examples moved to trunk

[SVN r83639]

example/index/benchmark3.cpp

@@ -0,0 +1,98 @@
+// Boost.Geometry Index
+// Additional tests
+
+// Copyright (c) 2011-2013 Adam Wulkiewicz, Lodz, Poland.
+
+// Use, modification and distribution is subject to the Boost Software License,
+// Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt)
+
+#include <iostream>
+
+#include <boost/geometry/index/rtree.hpp>
+
+#include <boost/chrono.hpp>
+#include <boost/foreach.hpp>
+#include <boost/random.hpp>
+#include <set>
+
+int main()
+{
+    namespace bg = boost::geometry;
+    namespace bgi = bg::index;
+    typedef boost::chrono::thread_clock clock_t;
+    typedef boost::chrono::duration<float> dur_t;
+
+    size_t stored_count = 100000;
+
+    std::vector< std::pair<float, float> > coords;
+
+    //randomize values
+    {
+        boost::mt19937 rng;
+        //rng.seed(static_cast<unsigned int>(std::time(0)));
+        float max_val = static_cast<float>(stored_count / 10);
+        boost::uniform_real<float> range(-max_val, max_val);
+        boost::variate_generator<boost::mt19937&, boost::uniform_real<float> > rnd(rng, range);
+
+        coords.reserve(stored_count);
+
+        std::cout << "randomizing data\n";
+        for ( size_t i = 0 ; i < stored_count ; ++i )
+        {
+            coords.push_back(std::make_pair(rnd(), rnd()));
+        }
+        std::cout << "randomized\n";
+    }
+
+    typedef bg::model::point<float, 2, bg::cs::cartesian> P;
+    typedef bgi::rtree<P, bgi::dynamic_linear > RTL;
+    typedef bgi::rtree<P, bgi::dynamic_quadratic > RTQ;
+    typedef bgi::rtree<P, bgi::dynamic_rstar > RTR;
+
+    for ( size_t m = 4 ; m < 33 ; m += 2 )
+    {
+        size_t mm = ::ceil(m / 3.0f);
+
+        RTL rtl(bgi::dynamic_linear(m, mm));
+        RTQ rtq(bgi::dynamic_quadratic(m, mm));
+        RTR rtr(bgi::dynamic_rstar(m, mm));
+
+        std::cout << m << ' ' << mm << ' ';
+
+        // inserting test
+        {
+            clock_t::time_point start = clock_t::now();
+            for (size_t i = 0 ; i < stored_count ; ++i )
+            {
+                P p(coords[i].first, coords[i].second);
+                rtl.insert(p);
+            }            
+            dur_t time = clock_t::now() - start;
+            std::cout << time.count() << ' ';
+
+            start = clock_t::now();
+            for (size_t i = 0 ; i < stored_count ; ++i )
+            {
+                P p(coords[i].first, coords[i].second);
+                rtq.insert(p);
+            }
+            time = clock_t::now() - start;
+            std::cout << time.count() << ' ';
+
+            start = clock_t::now();
+            for (size_t i = 0 ; i < stored_count ; ++i )
+            {
+                float v = i / 100.0f;
+                P p(coords[i].first, coords[i].second);
+                rtr.insert(p);
+            }
+            time = clock_t::now() - start;
+            std::cout << time.count() << ' ';
+        }
+
+        std::cout << '\n';
+    }
+
+    return 0;
+}