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133 lines
4.1 KiB
C++
133 lines
4.1 KiB
C++
// Boost.Geometry (aka GGL, Generic Geometry Library)
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// Unit Test
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// Copyright (c) 2007-2012 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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#ifndef BOOST_GEOMETRY_TEST_SIMPLIFY_HPP
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#define BOOST_GEOMETRY_TEST_SIMPLIFY_HPP
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// Test-functionality, shared between single and multi tests
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#include <iomanip>
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#include <sstream>
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#include <geometry_test_common.hpp>
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#include <boost/geometry/algorithms/simplify.hpp>
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#include <boost/geometry/algorithms/distance.hpp>
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#include <boost/geometry/strategies/strategies.hpp>
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#include <boost/geometry/io/wkt/wkt.hpp>
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#include <boost/variant/variant.hpp>
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template <typename Tag, typename Geometry>
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struct test_inserter
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{
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static void apply(Geometry& , std::string const& , double )
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{}
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};
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template <typename Geometry>
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struct test_inserter<bg::linestring_tag, Geometry>
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{
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template <typename DistanceMeasure>
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static void apply(Geometry& geometry,
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std::string const& expected,
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DistanceMeasure const& distance)
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{
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Geometry simplified;
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bg::detail::simplify::simplify_insert(geometry,
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std::back_inserter(simplified), distance);
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std::ostringstream out;
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// TODO: instead of comparing the full string (with more or less decimal digits),
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// we should call something more robust to check the test for example geometry::equals
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out << std::setprecision(12) << bg::wkt(simplified);
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BOOST_CHECK_EQUAL(out.str(), expected);
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}
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};
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template <typename Geometry, typename DistanceMeasure>
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void check_geometry(Geometry const& geometry,
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std::string const& expected,
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DistanceMeasure const& distance)
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{
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Geometry simplified;
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bg::simplify(geometry, simplified, distance);
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std::ostringstream out;
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out << std::setprecision(12) << bg::wkt(simplified);
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BOOST_CHECK_EQUAL(out.str(), expected);
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}
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template <typename Geometry, typename Strategy, typename DistanceMeasure>
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void check_geometry(Geometry const& geometry,
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std::string const& expected,
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DistanceMeasure const& distance,
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Strategy const& strategy)
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{
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Geometry simplified;
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bg::simplify(geometry, simplified, distance, strategy);
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std::ostringstream out;
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out << std::setprecision(12) << bg::wkt(simplified);
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BOOST_CHECK_EQUAL(out.str(), expected);
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}
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template <typename Geometry, typename DistanceMeasure>
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void test_geometry(std::string const& wkt,
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std::string const& expected,
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DistanceMeasure distance)
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{
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typedef typename bg::point_type<Geometry>::type point_type;
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Geometry geometry;
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bg::read_wkt(wkt, geometry);
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boost::variant<Geometry> v(geometry);
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// Define default strategy for testing
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typedef bg::strategy::simplify::douglas_peucker
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<
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typename bg::point_type<Geometry>::type,
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bg::strategy::distance::projected_point<double>
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> dp;
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check_geometry(geometry, expected, distance);
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check_geometry(v, expected, distance);
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BOOST_CONCEPT_ASSERT( (bg::concept::SimplifyStrategy<dp, point_type>) );
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check_geometry(geometry, expected, distance, dp());
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check_geometry(v, expected, distance, dp());
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// Check inserter (if applicable)
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test_inserter
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<
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typename bg::tag<Geometry>::type,
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Geometry
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>::apply(geometry, expected, distance);
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}
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template <typename Geometry, typename Strategy, typename DistanceMeasure>
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void test_geometry(std::string const& wkt,
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std::string const& expected,
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DistanceMeasure const& distance,
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Strategy const& strategy)
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{
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typedef typename bg::point_type<Geometry>::type point_type;
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Geometry geometry;
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bg::read_wkt(wkt, geometry);
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boost::variant<Geometry> v(geometry);
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//BOOST_CONCEPT_ASSERT( (bg::concept::SimplifyStrategy<Strategy, point_type>) );
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check_geometry(geometry, expected, distance, strategy);
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check_geometry(v, expected, distance, strategy);
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}
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#endif
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