boost/geometry/algorithms/detail/make/make.hpp

   1 // Boost.Geometry
   2
   3 // Copyright (c) 2019 Barend Gehrels, Amsterdam, the Netherlands.
   4
   5 // Use, modification and distribution is subject to the Boost Software License,
   6 // Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
   7 // http://www.boost.org/LICENSE_1_0.txt)
   8
   9 #ifndef BOOST_GEOMETRY_ALGORITHMS_DETAIL_MAKE_MAKE_HPP
  10 #define BOOST_GEOMETRY_ALGORITHMS_DETAIL_MAKE_MAKE_HPP
  11
  12 #include <boost/geometry/geometries/infinite_line.hpp>
  13 #include <boost/geometry/core/access.hpp>
  14
  15 namespace boost { namespace geometry
  16 {
  17
  18 #ifndef DOXYGEN_NO_DETAIL
  19 namespace detail { namespace make
  20 {
  21
  22 template <typename Type, typename Coordinate>
  23 inline
  24 model::infinite_line<Type> make_infinite_line(Coordinate const& x1,
  25     Coordinate const& y1, Coordinate const& x2, Coordinate const& y2)
  26 {
  27     model::infinite_line<Type> result;
  28     result.a = y1 - y2;
  29     result.b = x2 - x1;
  30     result.c = -result.a * x1 - result.b * y1;
  31     return result;
  32 }
  33
  34 template <typename Type, typename Point>
  35 inline
  36 model::infinite_line<Type> make_infinite_line(Point const& a, Point const& b)
  37 {
  38     return make_infinite_line<Type>(geometry::get<0>(a), geometry::get<1>(a),
  39         geometry::get<0>(b), geometry::get<1>(b));
  40 }
  41
  42 template <typename Type, typename Segment>
  43 inline
  44 model::infinite_line<Type> make_infinite_line(Segment const& segment)
  45 {
  46     return make_infinite_line<Type>(geometry::get<0, 0>(segment),
  47         geometry::get<0, 1>(segment),
  48         geometry::get<1, 0>(segment),
  49         geometry::get<1, 1>(segment));
  50 }
  51
  52
  53
  54 }} // namespace detail::make
  55 #endif // DOXYGEN_NO_DETAIL
  56
  57
  58 }} // namespace boost::geometry
  59
  60 #endif // BOOST_GEOMETRY_ALGORITHMS_DETAIL_MAKE_MAKE_HPP