ceph/src/boost/libs/geometry/doc/src/examples/algorithms/assign_box_corners.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 // Use, modification and distribution is subject to the Boost Software License,
   7 // Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
   8 // http://www.boost.org/LICENSE_1_0.txt)
   9
  10 //[assign_box_corners
  11 //` Shows how four point can be assigned from a 2D box
  12
  13 #include <iostream>
  14
  15 #include <boost/geometry.hpp>
  16 #include <boost/geometry/geometries/box.hpp>
  17 #include <boost/geometry/geometries/point_xy.hpp>
  18
  19 using namespace boost::geometry;
  20
  21 int main()
  22 {
  23     typedef model::d2::point_xy<double> point;
  24     typedef model::box<point> box;
  25
  26     box b;
  27     assign_values(b, 2, 2, 5, 5);
  28
  29     point ll, lr, ul, ur;
  30     assign_box_corners(b, ll, lr, ul, ur);
  31
  32     std::cout << "box: " << dsv(b) << std::endl << std::endl;
  33
  34     std::cout << dsv(ul) << " --- " << dsv(ur) << std::endl;
  35     for (int i = 0; i < 3; i++)
  36     {
  37         std::cout << "  |          |" << std::endl;
  38     }
  39     std::cout << dsv(ll) << " --- " << dsv(lr) << std::endl;
  40
  41     return 0;
  42 }
  43
  44 //]
  45
  46
  47 //[assign_box_corners_output
  48 /*`
  49 Output:
  50 [pre
  51 box: ((2, 2), (5, 5))
  52
  53 (2, 5) --- (5, 5)
  54   |          |
  55   |          |
  56   |          |
  57 (2, 2) --- (5, 2)
  58 ]
  59 */
  60 //]