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55 lines
1.4 KiB
C++
55 lines
1.4 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
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//` Example showing how to simplify a linestring
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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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/*< For this example we use Boost.Assign to add points >*/
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#include <boost/assign.hpp>
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using namespace boost::assign;
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int main()
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{
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typedef boost::geometry::model::d2::point_xy<double> xy;
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boost::geometry::model::linestring<xy> line;
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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 >*/
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// Simplify it, using distance of 0.5 units
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boost::geometry::model::linestring<xy> simplified;
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boost::geometry::simplify(line, simplified, 0.5);
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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_output
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/*`
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Output:
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[pre
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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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//]
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