| // 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) |
| |
| //[closure |
| //` Examine if a polygon is defined as "should be closed" |
| |
| #include <iostream> |
| |
| #include <boost/geometry.hpp> |
| #include <boost/geometry/geometries/polygon.hpp> |
| #include <boost/geometry/geometries/point_xy.hpp> |
| |
| int main() |
| { |
| typedef boost::geometry::model::d2::point_xy<double> point_type; |
| typedef boost::geometry::model::polygon<point_type> polygon_type; |
| |
| boost::geometry::closure_selector clos = boost::geometry::closure<polygon_type>::value; |
| |
| std::cout << "closure: " << clos << std::endl |
| << "(open = " << boost::geometry::open |
| << ", closed = " << boost::geometry::closed |
| << ") "<< std::endl; |
| |
| return 0; |
| } |
| |
| //] |
| |
| |
| //[closure_output |
| /*` |
| Output: |
| [pre |
| closure: 1 |
| (open = 0, closed = 1) |
| ] |
| */ |
| //] |
