ceph/src/boost/libs/geometry/doc/src/examples/geometries/box.cpp

   1 // Boost.Geometry
   2 // QuickBook Example
   3
   4 // Copyright (c) 2011-2012 Barend Gehrels, Amsterdam, the Netherlands.
   5 // Copyright (c) 2015 Adam Wulkiewicz, Lodz, Poland.
   6
   7 // Use, modification and distribution is subject to the Boost Software License,
   8 // Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
   9 // http://www.boost.org/LICENSE_1_0.txt)
  10
  11 //[box
  12 //` Declaration and use of the Boost.Geometry model::box, modelling the Box Concept
  13
  14 #include <iostream>
  15 #include <boost/geometry.hpp>
  16
  17 namespace bg = boost::geometry;
  18
  19 int main()
  20 {
  21     typedef bg::model::point<double, 2, bg::cs::cartesian> point_t;
  22     typedef bg::model::box<point_t> box_t;
  23
  24     box_t box1; /*< Default-construct a box. >*/
  25     box_t box2(point_t(0.0, 0.0), point_t(5.0, 5.0)); /*< Construct, assigning min and max corner point. >*/
  26
  27 #ifndef BOOST_NO_CXX11_UNIFIED_INITIALIZATION_SYNTAX
  28
  29     box_t box3{{0.0, 0.0}, {5.0, 5.0}}; /*< Construct, using C++11 unified initialization syntax. >*/
  30
  31 #endif
  32
  33     bg::set<bg::min_corner, 0>(box1, 1.0); /*< Set a coordinate, generic. >*/
  34     bg::set<bg::min_corner, 1>(box1, 2.0);
  35     box1.max_corner().set<0>(3.0); /*< Set a coordinate, class-specific ([*Note]: prefer `bg::set()`). >*/
  36     box1.max_corner().set<1>(4.0);
  37
  38     double min_x = bg::get<bg::min_corner, 0>(box1); /*< Get a coordinate, generic. >*/
  39     double min_y = bg::get<bg::min_corner, 1>(box1);
  40     double max_x = box1.max_corner().get<0>(); /*< Get a coordinate, class-specific ([*Note]: prefer `bg::get()`). >*/
  41     double max_y = box1.max_corner().get<1>();
  42
  43     std::cout << min_x << ", " << min_y << ", " << max_x << ", " << max_y << std::endl;
  44
  45     return 0;
  46 }
  47
  48 //]
  49
  50
  51 //[box_output
  52 /*`
  53 Output:
  54 [pre
  55 1, 2, 3, 4
  56 ]
  57 */
  58 //]