/Src/Dependencies/Boost/libs/geometry/doc/src/examples/algorithms/simplify_insert_with_strategy.cpp
http://hadesmem.googlecode.com/ · C++ · 75 lines · 23 code · 17 blank · 35 comment · 0 complexity · b147245f0e3d497682a6773e5b318315 MD5 · raw file
- // 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_inserter
- //` Simplify a linestring using an output iterator
- #include <iostream>
- #include <boost/geometry.hpp>
- #include <boost/geometry/geometries/linestring.hpp>
- #include <boost/geometry/geometries/point_xy.hpp>
- #include <boost/geometry/domains/gis/io/wkt/wkt.hpp>
- #include <boost/geometry/domains/gis/io/wkt/stream_wkt.hpp>
- int main()
- {
- typedef boost::geometry::model::d2::point_xy<double> P;
- typedef boost::geometry::model::linestring<P> L;
- L line;
- boost::geometry::read_wkt("linestring(1.1 1.1, 2.5 2.1, 3.1 3.1, 4.9 1.1, 3.1 1.9)", line);
- typedef boost::geometry::strategy::distance::projected_point<P, P> DS;
- typedef boost::geometry::strategy::simplify::douglas_peucker<P, DS> simplification;
- L simplified;
- boost::geometry::simplify_inserter(line, std::back_inserter(simplified), 0.5, simplification()); //std::ostream_iterator<P>(std::cout, "\n"), 0.5);//);
- //std::cout << simplified[0];
- //boost::geometry::simplify_inserter(line, std::ostream_iterator<P>(std::cout, "\n"), 0.5);//, simplification());
- std::ostream_iterator<P> out(std::cout, "\n");
- std::copy(simplified.begin(), simplified.end(), out);
- std::cout
- << " original: " << boost::geometry::dsv(line) << std::endl
- << "simplified: " << boost::geometry::dsv(simplified) << std::endl;
- return 0;
- }
- //]
- //[simplify_inserter_output
- /*`
- Output:
- [pre
- simplify_inserter: 16
- simplify_inserter: 0.339837
- ]
- */
- //]
- /*
- OUTPUT
- POINT(1.1 1.1) 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))
- */
- /*
- OUTPUT
- POINT(1.1 1.1) 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))
- */
- /*
- OUTPUT
- POINT(1.1 1.1) 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))
- */