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73 lines
2.2 KiB
C++
73 lines
2.2 KiB
C++
// Boost.Geometry (aka GGL, Generic Geometry Library)
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// QuickBook Example
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// Copyright (c) 2011-2012 Barend Gehrels, Amsterdam, the Netherlands.
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// Use, modification and distribution is subject to the Boost Software License,
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// Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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//[simplify_inserter
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//` Simplify a linestring using an output iterator
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#include <iostream>
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#include <boost/geometry.hpp>
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#include <boost/geometry/geometries/linestring.hpp>
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#include <boost/geometry/geometries/point_xy.hpp>
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#include <boost/geometry/io/wkt/wkt.hpp>
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int main()
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{
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typedef boost::geometry::model::d2::point_xy<double> P;
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typedef boost::geometry::model::linestring<P> L;
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L line;
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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);
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typedef boost::geometry::strategy::distance::projected_point<P, P> DS;
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typedef boost::geometry::strategy::simplify::douglas_peucker<P, DS> simplification;
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L simplified;
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boost::geometry::simplify_inserter(line, std::back_inserter(simplified), 0.5, simplification()); //std::ostream_iterator<P>(std::cout, "\n"), 0.5);//);
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//std::cout << simplified[0];
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//boost::geometry::simplify_inserter(line, std::ostream_iterator<P>(std::cout, "\n"), 0.5);//, simplification());
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std::ostream_iterator<P> out(std::cout, "\n");
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std::copy(simplified.begin(), simplified.end(), out);
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std::cout
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<< " original: " << boost::geometry::dsv(line) << std::endl
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<< "simplified: " << boost::geometry::dsv(simplified) << std::endl;
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return 0;
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}
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//]
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//[simplify_inserter_output
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/*`
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Output:
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[pre
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simplify_inserter: 16
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simplify_inserter: 0.339837
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]
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*/
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//]
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/*
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OUTPUT
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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))
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simplified: ((1.1, 1.1), (3.1, 3.1), (4.9, 1.1), (3.1, 1.9))
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*/
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/*
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OUTPUT
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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))
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simplified: ((1.1, 1.1), (3.1, 3.1), (4.9, 1.1), (3.1, 1.9))
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*/
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/*
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OUTPUT
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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))
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simplified: ((1.1, 1.1), (3.1, 3.1), (4.9, 1.1), (3.1, 1.9))
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*/
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