37 lines
1.2 KiB
C++
37 lines
1.2 KiB
C++
// Boost.Geometry (aka GGL, Generic Geometry Library)
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// Copyright (c) 2009-2012 Mateusz Loskot, London, UK.
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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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//
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// Multipolygon DP simplification example from the mailing list discussion
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// about the DP algorithm issue:
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// http://lists.osgeo.org/pipermail/ggl/2011-September/001533.html
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#include <boost/geometry.hpp>
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#include <boost/geometry/strategies/cartesian/distance_pythagoras.hpp>
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#include <boost/geometry/geometries/point_xy.hpp>
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using namespace boost::geometry;
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int main()
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{
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typedef model::d2::point_xy<double> point_xy;
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point_xy p1(0.0, 0.0);
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point_xy p2(5.0, 0.0);
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// 1) This is direct call to Pythagoras algo
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typedef strategy::distance::pythagoras<point_xy, point_xy, double> strategy1_type;
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strategy1_type strategy1;
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strategy1_type ::calculation_type d1 = strategy1.apply(p1, p2);
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// 2) This is what is effectively called by simplify
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typedef strategy::distance::comparable::pythagoras<point_xy, point_xy, double> strategy2_type;
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strategy2_type strategy2;
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strategy2_type::calculation_type d2 = strategy2.apply(p1, p2);
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return 0;
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}
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