ceph/src/boost/libs/geometry/doc/src/examples/geometries/segment.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 //[segment
  12 //` Declaration and use of the Boost.Geometry model::segment, modelling the Segment Concept
  13
  14 #include <iostream>
  15 #include <boost/geometry.hpp>
  16 #include <boost/geometry/geometries/geometries.hpp>
  17
  18 namespace bg = boost::geometry;
  19
  20 int main()
  21 {
  22     typedef bg::model::point<double, 2, bg::cs::cartesian> point_t;
  23     typedef bg::model::segment<point_t> segment_t;
  24
  25     segment_t seg1; /*< Default-construct a segment. >*/
  26     segment_t seg2(point_t(0.0, 0.0), point_t(5.0, 5.0)); /*< Construct, assigning the first and the second point. >*/
  27
  28 #ifndef BOOST_NO_CXX11_UNIFIED_INITIALIZATION_SYNTAX
  29
  30     segment_t seg3{{0.0, 0.0}, {5.0, 5.0}}; /*< Construct, using C++11 unified initialization syntax. >*/
  31
  32 #endif
  33
  34     bg::set<0, 0>(seg1, 1.0); /*< Set a coordinate. >*/
  35     bg::set<0, 1>(seg1, 2.0);
  36     bg::set<1, 0>(seg1, 3.0);
  37     bg::set<1, 1>(seg1, 4.0);
  38
  39     double x0 = bg::get<0, 0>(seg1); /*< Get a coordinate. >*/
  40     double y0 = bg::get<0, 1>(seg1);
  41     double x1 = bg::get<1, 0>(seg1);
  42     double y1 = bg::get<1, 1>(seg1);
  43
  44     std::cout << x0 << ", " << y0 << ", " << x1 << ", " << y1 << std::endl;
  45
  46     return 0;
  47 }
  48
  49 //]
  50
  51
  52 //[segment_output
  53 /*`
  54 Output:
  55 [pre
  56 1, 2, 3, 4
  57 ]
  58 */
  59 //]