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