| // Boost.Geometry (aka GGL, Generic Geometry Library) |
| // QuickBook Example |
| |
| // Copyright (c) 2011 Barend Gehrels, Amsterdam, the Netherlands. |
| |
| // Use, modification and distribution is subject to the Boost Software License, |
| // Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at |
| // http://www.boost.org/LICENSE_1_0.txt) |
| |
| //[assign |
| //` Shows how to assign a geometry from another geometry |
| |
| #include <iostream> |
| |
| #include <boost/geometry.hpp> |
| #include <boost/geometry/geometries/box.hpp> |
| #include <boost/geometry/geometries/point_xy.hpp> |
| #include <boost/geometry/geometries/polygon.hpp> |
| #include <boost/geometry/geometries/adapted/boost_tuple.hpp> |
| |
| BOOST_GEOMETRY_REGISTER_BOOST_TUPLE_CS(cs::cartesian) |
| |
| int main() |
| { |
| typedef boost::geometry::model::d2::point_xy<double> point; |
| typedef boost::geometry::model::box<point> box; |
| typedef boost::geometry::model::polygon<point> polygon; |
| |
| point p1; |
| box b; |
| boost::geometry::assign_values(p1, 1, 1); |
| boost::geometry::assign_values(b, 1, 1, 2, 2); |
| |
| // Assign a box to a polygon (target = source) |
| polygon p; |
| boost::geometry::assign(p, b); |
| |
| // Assign a point to another point type (conversion of point-type) |
| boost::tuple<double, double> p2; |
| boost::geometry::assign(p2, p1); |
| |
| using boost::geometry::dsv; |
| std::cout |
| << "box: " << dsv(b) << std::endl |
| << "polygon: " << dsv(p) << std::endl |
| << "point: " << dsv(p1) << std::endl |
| << "point tuples: " << dsv(p2) << std::endl |
| ; |
| |
| return 0; |
| } |
| |
| //] |
| |
| |
| //[assign_output |
| /*` |
| Output: |
| [pre |
| box: ((1, 1), (2, 2)) |
| polygon: (((1, 1), (1, 2), (2, 2), (2, 1), (1, 1))) |
| point: (1, 1) |
| point tuples: (1, 1) |
| ] |
| */ |
| //] |