ceph/src/boost/libs/geometry/doc/src/examples/algorithms/relation.cpp

   1 // Boost.Geometry (aka GGL, Generic Geometry Library)
   2 // QuickBook Example
   3
   4 // Copyright (c) 2011-2012 Barend Gehrels, Amsterdam, the Netherlands.
   5
   6 // This file was modified by Oracle on 2015.
   7 // Modifications copyright (c) 2015 Oracle and/or its affiliates.
   8
   9 // Contributed and/or modified by Adam Wulkiewicz, on behalf of Oracle
  10
  11 // Use, modification and distribution is subject to the Boost Software License,
  12 // Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
  13 // http://www.boost.org/LICENSE_1_0.txt)
  14
  15 //[relation
  16 //` Shows how to calculate the spatial relation between a point and a polygon
  17
  18 #include <iostream>
  19 #include <string>
  20
  21 #include <boost/geometry.hpp>
  22 #include <boost/geometry/geometries/point_xy.hpp>
  23 #include <boost/geometry/geometries/polygon.hpp>
  24 /*<-*/ #include "create_svg_two.hpp" /*->*/
  25
  26 int main()
  27 {
  28     typedef boost::geometry::model::d2::point_xy<double> point_type;
  29     typedef boost::geometry::model::polygon<point_type> polygon_type;
  30
  31     polygon_type poly;
  32     boost::geometry::read_wkt(
  33         "POLYGON((2 1.3,2.4 1.7,2.8 1.8,3.4 1.2,3.7 1.6,3.4 2,4.1 3,5.3 2.6,5.4 1.2,4.9 0.8,2.9 0.7,2 1.3)"
  34             "(4.0 2.0, 4.2 1.4, 4.8 1.9, 4.4 2.2, 4.0 2.0))", poly);
  35
  36     point_type p(4, 1);
  37
  38     boost::geometry::de9im::matrix matrix = boost::geometry::relation(p, poly);
  39     std::string code = matrix.str();
  40
  41     std::cout << "relation: " << code << std::endl;
  42     /*<-*/ create_svg("relation.svg", poly, p); /*->*/
  43     return 0;
  44 }
  45
  46 //]
  47
  48 //[relation_output
  49 /*`
  50 Output:
  51 [pre
  52 relation: 0FFFFF212
  53
  54 [$img/algorithms/within.png]
  55 ]
  56
  57 */
  58 //]