Added several samples for make and assign

[SVN r69126]

doc/src/examples/algorithms/intersects_segment.cpp

@@ -0,0 +1,44 @@
+// Boost.Geometry (aka GGL, Generic Geometry Library)
+//
+// Copyright Barend Gehrels 2011, Geodan, Amsterdam, the Netherlands
+// 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)
+//
+// Quickbook Example
+
+//[intersects
+//` Check if two linestrings intersect each other
+
+#include <iostream>
+
+#include <boost/geometry/geometry.hpp>
+#include <boost/geometry/extensions/gis/io/wkt/wkt.hpp>
+
+int main()
+{
+    // Calculate the intersects of a cartesian polygon
+    typedef boost::geometry::model::d2::point_xy<double> P;
+    bg::model::linestring<P> line1, line2;
+
+    boost::geometry::read_wkt("linestring(1 1,2 2)", line1);
+    boost::geometry::read_wkt("linestring(2 1,1 2)", line2);
+
+    bool b = boost::geometry::intersects(line1, line2);
+
+    std::cout << "Intersects: " << (b ? "YES" : "NO") << std::endl;
+
+    return 0;
+}
+
+//]
+
+
+//[intersects_output
+/*`
+Output:
+[pre
+Intersects: YES
+]
+*/
+//]