| // 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) |
| |
| //[simplify |
| //` Example showing how to simplify a linestring |
| |
| #include <iostream> |
| |
| #include <boost/geometry.hpp> |
| #include <boost/geometry/geometries/linestring.hpp> |
| #include <boost/geometry/geometries/point_xy.hpp> |
| |
| /*< For this example we use Boost.Assign to add points >*/ |
| #include <boost/assign.hpp> |
| |
| using namespace boost::assign; |
| |
| |
| int main() |
| { |
| typedef boost::geometry::model::d2::point_xy<double> xy; |
| |
| boost::geometry::model::linestring<xy> line; |
| line += xy(1.1, 1.1), xy(2.5, 2.1), xy(3.1, 3.1), xy(4.9, 1.1), xy(3.1, 1.9); /*< With Boost.Assign >*/ |
| |
| // Simplify it, using distance of 0.5 units |
| boost::geometry::model::linestring<xy> simplified; |
| boost::geometry::simplify(line, simplified, 0.5); |
| std::cout |
| << " original: " << boost::geometry::dsv(line) << std::endl |
| << "simplified: " << boost::geometry::dsv(simplified) << std::endl; |
| |
| |
| return 0; |
| } |
| |
| //] |
| |
| |
| //[simplify_output |
| /*` |
| Output: |
| [pre |
| original: ((1.1, 1.1), (2.5, 2.1), (3.1, 3.1), (4.9, 1.1), (3.1, 1.9)) |
| simplified: ((1.1, 1.1), (3.1, 3.1), (4.9, 1.1), (3.1, 1.9)) |
| ] |
| */ |
| //] |