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/**
* SPDX-License-Identifier: GPL-2.0-or-later
*
* This file is part of osm2pgsql (https://osm2pgsql.org/).
*
* Copyright (C) 2006-2025 by the osm2pgsql developer community.
* For a full list of authors see the git log.
*/
#include <catch.hpp>
#include "common-buffer.hpp"
#include "geom-from-osm.hpp"
#include "geom-functions.hpp"
#include "geom-output.hpp"
#include "geom.hpp"
#include "projection.hpp"
#include <array>
TEST_CASE("create_multilinestring with single line", "[NoDB]")
{
geom::linestring_t const expected{{1, 1}, {2, 1}};
geom::linestring_t const expected_rev{{2, 1}, {1, 1}};
test_buffer_t buffer;
buffer.add_way("w20 Nn10x1y1,n11x2y1");
auto const geom =
geom::line_merge(geom::create_multilinestring(buffer.buffer()));
REQUIRE(geom.is_multilinestring());
REQUIRE(geometry_type(geom) == "MULTILINESTRING");
REQUIRE(dimension(geom) == 1);
REQUIRE(num_geometries(geom) == 1);
REQUIRE(area(geom) == Approx(0.0));
REQUIRE(length(geom) == Approx(1.0));
auto const &ml = geom.get<geom::multilinestring_t>();
REQUIRE(ml.num_geometries() == 1);
REQUIRE(ml[0] == expected);
auto const rev = reverse(geom);
REQUIRE(rev.is_multilinestring());
REQUIRE(rev.get<geom::multilinestring_t>()[0] == expected_rev);
}
TEST_CASE("create_multilinestring with single line and no force_multi",
"[NoDB]")
{
geom::linestring_t const expected{{1, 1}, {2, 1}};
test_buffer_t buffer;
buffer.add_way("w20 Nn10x1y1,n11x2y1");
auto const geom =
geom::line_merge(geom::create_multilinestring(buffer.buffer(), false));
REQUIRE(geom.is_linestring());
REQUIRE(geometry_type(geom) == "LINESTRING");
REQUIRE(num_geometries(geom) == 1);
REQUIRE(area(geom) == Approx(0.0));
REQUIRE(length(geom) == Approx(1.0));
auto const &l = geom.get<geom::linestring_t>();
REQUIRE(l.num_geometries() == 1);
REQUIRE(l == expected);
}
TEST_CASE(
"create_multilinestring with multiple incomplete lines and no force_multi",
"[NoDB]")
{
geom::linestring_t const expected{{1, 1}, {2, 1}};
test_buffer_t buffer;
SECTION("with second invalid line")
{
buffer.add_way("w20 Nn10x1y1,n11x2y1");
buffer.add_way("w21 Nn12x2y2");
}
SECTION("with second line with missing location")
{
buffer.add_way("w20 Nn10x1y1,n11x2y1");
buffer.add_way("w21 Nn12x2y2,n13");
}
auto const geom =
geom::line_merge(geom::create_multilinestring(buffer.buffer(), false));
REQUIRE(geom.is_linestring());
REQUIRE(geometry_type(geom) == "LINESTRING");
REQUIRE(num_geometries(geom) == 1);
REQUIRE(area(geom) == Approx(0.0));
REQUIRE(length(geom) == Approx(1.0));
auto const &l = geom.get<geom::linestring_t>();
REQUIRE(l.num_geometries() == 1);
REQUIRE(l == expected);
}
TEST_CASE("create_multilinestring with single line forming a ring", "[NoDB]")
{
geom::linestring_t const expected{{1, 1}, {2, 1}, {2, 2}, {1, 1}};
test_buffer_t buffer;
buffer.add_way("w20 Nn10x1y1,n11x2y1,n12x2y2,n10x1y1");
auto const geom =
geom::line_merge(geom::create_multilinestring(buffer.buffer()));
REQUIRE(geom.is_multilinestring());
REQUIRE(dimension(geom) == 1);
auto const &ml = geom.get<geom::multilinestring_t>();
REQUIRE(ml.num_geometries() == 1);
REQUIRE(ml[0] == expected);
}
TEST_CASE("create_multilinestring from two non-joined lines", "[NoDB]")
{
std::array<geom::linestring_t, 2> const expected{
geom::linestring_t{{1, 1}, {2, 1}}, geom::linestring_t{{2, 2}, {3, 2}}};
test_buffer_t buffer;
buffer.add_way("w20 Nn10x1y1,n11x2y1");
buffer.add_way("w21 Nn12x2y2,n13x3y2");
auto const geom =
geom::line_merge(geom::create_multilinestring(buffer.buffer()));
REQUIRE(geom.is_multilinestring());
REQUIRE(dimension(geom) == 1);
auto const &ml = geom.get<geom::multilinestring_t>();
REQUIRE(ml.num_geometries() == 2);
REQUIRE(ml[0] == expected[0]);
REQUIRE(ml[1] == expected[1]);
}
TEST_CASE("create_multilinestring from two lines end to end", "[NoDB]")
{
geom::linestring_t const expected{{1, 1}, {2, 1}, {2, 2}};
test_buffer_t buffer;
buffer.add_way("w20 Nn10x1y1,n11x2y1");
buffer.add_way("w21 Nn11x2y1,n12x2y2");
auto const geom =
geom::line_merge(geom::create_multilinestring(buffer.buffer()));
REQUIRE(geom.is_multilinestring());
auto const &ml = geom.get<geom::multilinestring_t>();
REQUIRE(ml.num_geometries() == 1);
REQUIRE(ml[0] == expected);
}
TEST_CASE("create_multilinestring from two lines with same start point",
"[NoDB]")
{
geom::linestring_t const expected{{2, 1}, {1, 1}, {1, 2}};
test_buffer_t buffer;
buffer.add_way("w20 Nn10x1y1,n11x2y1");
buffer.add_way("w21 Nn10x1y1,n12x1y2");
auto const geom =
geom::line_merge(geom::create_multilinestring(buffer.buffer()));
REQUIRE(geom.is_multilinestring());
auto const &ml = geom.get<geom::multilinestring_t>();
REQUIRE(ml.num_geometries() == 1);
REQUIRE(ml[0] == expected);
}
TEST_CASE("create_multilinestring from two lines with same end point", "[NoDB]")
{
geom::linestring_t const expected{{1, 2}, {1, 1}, {2, 1}};
test_buffer_t buffer;
buffer.add_way("w20 Nn10x1y2,n11x1y1");
buffer.add_way("w21 Nn12x2y1,n11x1y1");
auto const geom =
geom::line_merge(geom::create_multilinestring(buffer.buffer()));
REQUIRE(geom.is_multilinestring());
auto const &ml = geom.get<geom::multilinestring_t>();
REQUIRE(ml.num_geometries() == 1);
REQUIRE(ml[0] == expected);
}
TEST_CASE("create_multilinestring from two lines connected end to end forming "
"a ring",
"[NoDB]")
{
geom::linestring_t const expected{{1, 1}, {2, 1}, {2, 2}, {1, 2}, {1, 1}};
test_buffer_t buffer;
buffer.add_way("w20 Nn10x1y1,n11x2y1,n13x2y2");
buffer.add_way("w21 Nn13x2y2,n12x1y2,n10x1y1");
auto const geom =
geom::line_merge(geom::create_multilinestring(buffer.buffer()));
REQUIRE(geom.is_multilinestring());
auto const &ml = geom.get<geom::multilinestring_t>();
REQUIRE(ml.num_geometries() == 1);
REQUIRE(ml[0] == expected);
}
TEST_CASE("create_multilinestring from two lines with same start and end point",
"[NoDB]")
{
geom::linestring_t const expected{{2, 2}, {2, 1}, {1, 1}, {1, 2}, {2, 2}};
test_buffer_t buffer;
buffer.add_way("w20 Nn10x1y1,n11x2y1,n13x2y2");
buffer.add_way("w21 Nn10x1y1,n12x1y2,n13x2y2");
auto const geom =
geom::line_merge(geom::create_multilinestring(buffer.buffer()));
REQUIRE(geom.is_multilinestring());
auto const &ml = geom.get<geom::multilinestring_t>();
REQUIRE(ml.num_geometries() == 1);
REQUIRE(ml[0] == expected);
}
TEST_CASE("create_multilinestring from three lines, two with same start and "
"end point",
"[NoDB]")
{
geom::linestring_t const expected{{2, 2}, {2, 1}, {1, 1}, {1, 2}, {2, 2}};
test_buffer_t buffer;
buffer.add_way("w20 Nn10x1y1,n11x2y1,n13x2y2");
buffer.add_way("w21 Nn10x1y1,n12x1y2");
buffer.add_way("w22 Nn12x1y2,n13x2y2");
auto const geom =
geom::line_merge(geom::create_multilinestring(buffer.buffer()));
REQUIRE(geom.is_multilinestring());
auto const &ml = geom.get<geom::multilinestring_t>();
REQUIRE(ml.num_geometries() == 1);
REQUIRE(ml[0] == expected);
}
TEST_CASE("create_multilinestring from four segments forming two lines",
"[NoDB]")
{
std::array<geom::linestring_t, 2> const expected{
geom::linestring_t{{2, 1}, {1, 1}, {1, 2}},
geom::linestring_t{{3, 4}, {3, 3}, {4, 3}}};
test_buffer_t buffer;
buffer.add_way("w20 Nn10x1y1,n11x2y1");
buffer.add_way("w21 Nn10x1y1,n12x1y2");
buffer.add_way("w22 Nn13x3y4,n14x3y3");
buffer.add_way("w23 Nn15x4y3,n14x3y3");
auto const geom =
geom::line_merge(geom::create_multilinestring(buffer.buffer()));
REQUIRE(geom.is_multilinestring());
auto const &ml = geom.get<geom::multilinestring_t>();
REQUIRE(ml.num_geometries() == 2);
REQUIRE(ml[0] == expected[0]);
REQUIRE(ml[1] == expected[1]);
REQUIRE(geometry_n(geom, 1).get<geom::linestring_t>() == expected[0]);
REQUIRE(geometry_n(geom, 2).get<geom::linestring_t>() == expected[1]);
}
TEST_CASE("create_multilinestring from Y shape", "[NoDB]")
{
std::array<geom::linestring_t, 2> const expected{
geom::linestring_t{{2, 1}, {1, 1}, {1, 2}}, geom::linestring_t{
{1, 1},
{2, 2},
}};
test_buffer_t buffer;
buffer.add_way("w20 Nn10x1y1,n11x2y1");
buffer.add_way("w21 Nn10x1y1,n12x1y2");
buffer.add_way("w22 Nn10x1y1,n13x2y2");
auto const geom =
geom::line_merge(geom::create_multilinestring(buffer.buffer()));
REQUIRE(geom.is_multilinestring());
auto const &ml = geom.get<geom::multilinestring_t>();
REQUIRE(ml.num_geometries() == 2);
REQUIRE(ml[0] == expected[0]);
REQUIRE(ml[1] == expected[1]);
}
TEST_CASE("create_multilinestring from P shape", "[NoDB]")
{
geom::linestring_t const expected{{1, 1}, {1, 2}, {1, 3}, {2, 3}, {1, 2}};
test_buffer_t buffer;
buffer.add_way("w20 Nn10x1y1,n11x1y2,n12x1y3");
buffer.add_way("w21 Nn12x1y3,n13x2y3,n11x1y2");
auto const geom =
geom::line_merge(geom::create_multilinestring(buffer.buffer()));
REQUIRE(geom.is_multilinestring());
auto const &ml = geom.get<geom::multilinestring_t>();
REQUIRE(ml.num_geometries() == 1);
REQUIRE(ml[0] == expected);
}
TEST_CASE("create_multilinestring from P shape with closed way", "[NoDB]")
{
std::array<geom::linestring_t, 2> const expected{
geom::linestring_t{{1, 2}, {1, 1}}, geom::linestring_t{
{1, 2},
{1, 3},
{2, 3},
{1, 2},
}};
test_buffer_t buffer;
buffer.add_way("w20 Nn11x1y2,n12x1y3,n13x2y3,n11x1y2");
buffer.add_way("w21 Nn11x1y2,n10x1y1");
auto const geom =
geom::line_merge(geom::create_multilinestring(buffer.buffer()));
REQUIRE(geom.is_multilinestring());
auto const &ml = geom.get<geom::multilinestring_t>();
REQUIRE(ml.num_geometries() == 2);
REQUIRE(ml[0] == expected[0]);
REQUIRE(ml[1] == expected[1]);
}
TEST_CASE("create_multilinestring and simplify", "[NoDB]")
{
test_buffer_t buffer;
buffer.add_way("w20 Nn10x1y1,n11x1y2,n12x1y3");
buffer.add_way("w21 Nn12x1y3,n13x2y3,n11x1y2");
auto const geom = geom::create_multilinestring(buffer.buffer());
REQUIRE(geom.is_multilinestring());
REQUIRE(geom.srid() == PROJ_LATLONG);
auto const &mls = geom.get<geom::multilinestring_t>();
REQUIRE(mls.num_geometries() == 2);
REQUIRE(mls[0] == geom::linestring_t{{1, 1}, {1, 2}, {1, 3}});
REQUIRE(mls[1] == geom::linestring_t{{1, 3}, {2, 3}, {1, 2}});
SECTION("simplify with small tolerance")
{
auto const simplified_geom = geom::simplify(geom, 0.1);
REQUIRE(simplified_geom.is_multilinestring());
REQUIRE(simplified_geom.srid() == PROJ_LATLONG);
auto const &simplified_mls =
simplified_geom.get<geom::multilinestring_t>();
REQUIRE(simplified_mls.num_geometries() == 2);
REQUIRE(simplified_mls[0] == geom::linestring_t{{1, 1}, {1, 3}});
REQUIRE(simplified_mls[1] ==
geom::linestring_t{{1, 3}, {2, 3}, {1, 2}});
}
SECTION("simplify with large tolerance")
{
auto const simplified_geom = geom::simplify(geom, 10.0);
REQUIRE(simplified_geom.is_multilinestring());
REQUIRE(simplified_geom.srid() == PROJ_LATLONG);
auto const &simplified_mls =
simplified_geom.get<geom::multilinestring_t>();
REQUIRE(simplified_mls.num_geometries() == 2);
REQUIRE(simplified_mls[0] == geom::linestring_t{{1, 1}, {1, 3}});
REQUIRE(simplified_mls[1] == geom::linestring_t{{1, 3}, {1, 2}});
}
}
|
