mapnik/test/unit/vertex_adapter/transform_path_adapter.cpp

#include "catch.hpp"

#include <mapnik/transform_path_adapter.hpp>
#include <mapnik/geometry/correct.hpp>
#include <mapnik/vertex_adapters.hpp>
#include <mapnik/transform_path_adapter.hpp>
#include <mapnik/view_transform.hpp>
#include <mapnik/proj_transform.hpp>
#include <mapnik/projection.hpp>

TEST_CASE("transform_path_adapter")
{
#ifdef MAPNIK_USE_PROJ
    SECTION("polygon closing - epsg 2330")
    {
        mapnik::geometry::polygon<double> g;
        g.emplace_back();
        auto& exterior = g.back();

        exterior.emplace_back(88.1844308217992, 69.3553916041731);
        exterior.emplace_back(88.1846166524913, 69.3552821191223);
        exterior.emplace_back(88.1845090893871, 69.3553454342903);
        exterior.emplace_back(88.1844308217992, 69.3553916041731);

        using va_type = mapnik::geometry::polygon_vertex_adapter<double>;
        using path_type = mapnik::transform_path_adapter<mapnik::view_transform, va_type>;

        va_type va(g);
        mapnik::box2d<double> extent(16310607, 7704513, 16310621, 7704527);
        mapnik::view_transform tr(512, 512, extent);
        mapnik::projection proj1("epsg:2330");
        mapnik::projection proj2("epsg:4326");
        mapnik::proj_transform prj_trans(proj1, proj2);
        path_type path(tr, va, prj_trans);

        double x, y;
        unsigned cmd;

        cmd = path.vertex(&x, &y);
        CHECK(cmd == mapnik::SEG_MOVETO);
        CHECK(x == Approx(110.4328050613));
        CHECK(y == Approx(20.2204537392));

        cmd = path.vertex(&x, &y);
        CHECK(cmd == mapnik::SEG_LINETO);
        CHECK(x == Approx(342.1220560074));
        CHECK(y == Approx(486.732225963));

        cmd = path.vertex(&x, &y);
        CHECK(cmd == mapnik::SEG_LINETO);
        CHECK(x == Approx(207.9962329183));
        CHECK(y == Approx(216.9376912798));

        // close
        cmd = path.vertex(&x, &y);
        CHECK(cmd == mapnik::SEG_CLOSE);
        CHECK(x == 0);
        CHECK(y == 0);

        // end
        cmd = path.vertex(&x, &y);
        CHECK(cmd == mapnik::SEG_END);
        CHECK(x == 0);
        CHECK(y == 0);
    }

    SECTION("polygon closing - epsg 32633")
    {
        mapnik::geometry::polygon<double> g;
        g.emplace_back();
        auto& exterior = g.back();

        exterior.emplace_back(13, 13);
        exterior.emplace_back(14, 13);
        exterior.emplace_back(14, 14);
        exterior.emplace_back(14, 14);

        using va_type = mapnik::geometry::polygon_vertex_adapter<double>;
        using path_type = mapnik::transform_path_adapter<mapnik::view_transform, va_type>;

        va_type va(g);
        mapnik::box2d<double> extent(166022, 0, 833978, 9329005);
        mapnik::view_transform tr(512, 512, extent);
        mapnik::projection proj1("epsg:32633");
        mapnik::projection proj2("epsg:4326");
        mapnik::proj_transform prj_trans(proj1, proj2);
        path_type path(tr, va, prj_trans);

        double x, y;
        unsigned cmd;

        cmd = path.vertex(&x, &y);
        CHECK(cmd == mapnik::SEG_MOVETO);
        CHECK(x == Approx(89.7250280748));
        CHECK(y == Approx(433.0795069885));

        cmd = path.vertex(&x, &y);
        CHECK(cmd == mapnik::SEG_LINETO);
        CHECK(x == Approx(172.873973465));
        CHECK(y == Approx(433.1145779929));

        cmd = path.vertex(&x, &y);
        CHECK(cmd == mapnik::SEG_LINETO);
        CHECK(x == Approx(173.2194366775));
        CHECK(y == Approx(427.0442504759));

        // close
        cmd = path.vertex(&x, &y);
        CHECK(cmd == mapnik::SEG_CLOSE);
        CHECK(x == 0);
        CHECK(y == 0);

        // end
        cmd = path.vertex(&x, &y);
        CHECK(cmd == mapnik::SEG_END);
        CHECK(x == 0);
        CHECK(y == 0);
    }

#endif // MAPNIK_USE_PROJ
}