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199 lines
6.8 KiB
C++
199 lines
6.8 KiB
C++
// Boost.Geometry (aka GGL, Generic Geometry Library)
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// Unit Test
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// Copyright (c) 2012-2014 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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#include <test_buffer.hpp>
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#include <boost/geometry/multi/geometries/multi_geometries.hpp>
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static std::string const simplex = "MULTIPOINT((5 5),(7 7))";
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static std::string const three = "MULTIPOINT((5 8),(9 8),(7 11))";
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// Generates error (extra polygon on top of rest) at distance 14.0:
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static std::string const multipoint_a = "MULTIPOINT((39 44),(38 37),(41 29),(15 33),(58 39))";
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// Just one with holes at distance ~ 15
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static std::string const multipoint_b = "MULTIPOINT((5 56),(98 67),(20 7),(58 60),(10 4),(75 68),(61 68),(75 62),(92 26),(74 6),(67 54),(20 43),(63 30),(45 7))";
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template <typename P>
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void test_all()
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{
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//std::cout << typeid(bg::coordinate_type<P>::type).name() << std::endl;
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namespace buf = bg::strategy::buffer;
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typedef bg::model::polygon<P> polygon;
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typedef bg::model::multi_point<P> multi_point_type;
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double const pi = boost::geometry::math::pi<double>();
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test_one<multi_point_type, buf::join_miter, buf::end_round, polygon>("simplex1", simplex, 2.0 * pi, 1.0, 1.0);
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test_one<multi_point_type, buf::join_miter, buf::end_round, polygon>("simplex2", simplex, 22.8372, 2.0, 2.0);
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test_one<multi_point_type, buf::join_miter, buf::end_round, polygon>("simplex3", simplex, 44.5692, 3.0, 3.0);
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test_one<multi_point_type, buf::join_miter, buf::end_round, polygon>("three1", three, 3.0 * pi, 1.0, 1.0);
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test_one<multi_point_type, buf::join_miter, buf::end_round, polygon>("three2", three, 36.7592, 2.0, 2.0);
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test_one<multi_point_type, buf::join_miter, buf::end_round, polygon>("three19", three, 33.6914, 1.9, 1.9);
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test_one<multi_point_type, buf::join_miter, buf::end_round, polygon>("three21", three, 39.6394, 2.1, 2.1);
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test_one<multi_point_type, buf::join_miter, buf::end_round, polygon>("three3", three, 65.533, 3.0, 3.0);
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test_one<multi_point_type, buf::join_miter, buf::end_round, polygon>("multipoint_a", multipoint_a, 2049.98, 14.0, 14.0);
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test_one<multi_point_type, buf::join_miter, buf::end_round, polygon>("multipoint_b", multipoint_b, 7109.88, 15.0, 15.0);
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test_one<multi_point_type, buf::join_miter, buf::end_round, polygon>("multipoint_b1", multipoint_b, 6911.89, 14.7, 14.7);
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test_one<multi_point_type, buf::join_miter, buf::end_round, polygon>("multipoint_b2", multipoint_b, 7174.79, 15.1, 15.1);
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}
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template
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<
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typename GeometryOut,
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template<typename, typename> class JoinStrategy,
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template<typename, typename> class EndStrategy,
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typename Geometry
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>
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double test_growth(Geometry const& geometry, int n, int d, double distance)
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{
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namespace bg = boost::geometry;
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typedef typename bg::coordinate_type<Geometry>::type coordinate_type;
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typedef typename bg::point_type<Geometry>::type point_type;
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// extern int point_buffer_count;
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std::ostringstream complete;
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complete
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<< "point" << "_"
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<< "growth" << "_"
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<< string_from_type<coordinate_type>::name()
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<< "_" << "r"
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<< "_" << n
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<< "_" << d
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// << "_" << point_buffer_count
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;
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//std::cout << complete.str() << std::endl;
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std::ostringstream filename;
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filename << "buffer_" << complete.str() << ".svg";
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std::ofstream svg(filename.str().c_str());
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#ifdef BOOST_GEOMETRY_DEBUG_WITH_MAPPER
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bg::svg_mapper<point_type> mapper(svg, 500, 500);
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{
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bg::model::box<point_type> box;
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bg::envelope(geometry, box);
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bg::buffer(box, box, distance * 1.01);
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mapper.add(box);
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}
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#endif
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JoinStrategy
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<
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point_type,
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typename bg::point_type<GeometryOut>::type
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> join_strategy;
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EndStrategy
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<
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point_type,
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typename bg::point_type<GeometryOut>::type
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> end_strategy;
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typedef bg::strategy::buffer::distance_symmetric<coordinate_type> distance_strategy_type;
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distance_strategy_type distance_strategy(distance);
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std::vector<GeometryOut> buffered;
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typedef typename bg::rescale_policy_type<point_type>::type
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rescale_policy_type;
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rescale_policy_type rescale_policy
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= bg::get_rescale_policy<rescale_policy_type>(geometry);
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bg::buffer_inserter<GeometryOut>(geometry, std::back_inserter(buffered),
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distance_strategy,
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join_strategy,
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end_strategy,
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rescale_policy
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#ifdef BOOST_GEOMETRY_DEBUG_WITH_MAPPER
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, mapper
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#endif
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);
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typename bg::default_area_result<GeometryOut>::type area = 0;
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BOOST_FOREACH(GeometryOut const& polygon, buffered)
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{
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area += bg::area(polygon);
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}
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#ifdef BOOST_GEOMETRY_DEBUG_WITH_MAPPER
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// Map input geometry in green
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mapper.map(geometry, "opacity:0.5;fill:rgb(0,128,0);stroke:rgb(0,128,0);stroke-width:10");
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BOOST_FOREACH(GeometryOut const& polygon, buffered)
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{
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mapper.map(polygon, "opacity:0.4;fill:rgb(255,255,128);stroke:rgb(0,0,0);stroke-width:3");
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}
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#endif
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return area;
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}
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template <typename P>
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void test_growth(int n, int distance_count)
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{
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srand(int(time(NULL)));
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//std::cout << typeid(bg::coordinate_type<P>::type).name() << std::endl;
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boost::timer t;
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namespace buf = bg::strategy::buffer;
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typedef bg::model::polygon<P> polygon;
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typedef bg::model::multi_point<P> multi_point_type;
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multi_point_type multi_point;
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for (int i = 0; i < n; i++)
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{
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P point(rand() % 100, rand() % 100);
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multi_point.push_back(point);
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}
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//std::cout << bg::wkt(multi_point) << std::endl;
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double previous_area = 0;
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double epsilon = 0.1;
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double distance = 15.0;
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for (int d = 0; d < distance_count; d++, distance += epsilon)
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{
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double area = test_growth<polygon, buf::join_miter, buf::end_round>(multi_point, n, d, distance);
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if (area < previous_area)
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{
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std::cout << "Error: " << area << " < " << previous_area << std::endl
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<< " n=" << n << " distance=" << distance
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<< bg::wkt(multi_point) << std::endl;
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}
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previous_area = area;
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}
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std::cout << "n=" << n << " time=" << t.elapsed() << std::endl;
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}
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int test_main(int, char* [])
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{
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//std::cout << std::setprecision(6);
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//test_all<bg::model::point<float, 2, bg::cs::cartesian> >();
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test_all<bg::model::point<double, 2, bg::cs::cartesian> >();
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#ifdef BOOST_GEOMETRY_BUFFER_TEST_GROWTH
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for (int i = 5; i <= 50; i++)
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{
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test_growth<bg::model::point<double, 2, bg::cs::cartesian> >(i, 20);
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}
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#endif
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return 0;
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}
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