89 lines
2.5 KiB
C++
89 lines
2.5 KiB
C++
#include "catch.hpp"
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#include <mapnik/geometry/closest_point.hpp>
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TEST_CASE("geometry closest point") {
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#if BOOST_VERSION >= 106200
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SECTION("geometry_empty") {
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mapnik::geometry::point<double> pt(0, 0);
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mapnik::geometry::geometry_empty empty;
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auto result = mapnik::geometry::closest_point(empty, pt);
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REQUIRE(result.x == 0.0);
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REQUIRE(result.y == 0.0);
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REQUIRE(result.distance == -1.0);
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}
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SECTION("point") {
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mapnik::geometry::point<double> pt(0, 0);
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mapnik::geometry::point<double> geom(3.0, 4.0);
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auto result = mapnik::geometry::closest_point(geom, pt);
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REQUIRE(result.x == geom.x);
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REQUIRE(result.y == geom.y);
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REQUIRE(result.distance == 5.0);
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}
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SECTION("linestring") {
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mapnik::geometry::line_string<double> line;
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line.emplace_back(0, 0);
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line.emplace_back(0, 100);
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line.emplace_back(100, 100);
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line.emplace_back(100, 0);
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mapnik::geometry::point<double> pt(50, 50);
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auto result = mapnik::geometry::closest_point(line, pt);
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REQUIRE(result.x == 0.0);
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REQUIRE(result.y == 50.0);
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REQUIRE(result.distance == 50.0);
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}
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SECTION("polygon") {
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mapnik::geometry::polygon<double> poly;
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mapnik::geometry::linear_ring<double> ring;
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ring.emplace_back(0, 0);
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ring.emplace_back(1, 0);
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ring.emplace_back(1, 1);
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ring.emplace_back(0, 1);
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ring.emplace_back(0, 0);
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poly.push_back(std::move(ring));
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{
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// point inside polygon
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mapnik::geometry::point<double> pt {0.5, 0.25};
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auto result = mapnik::geometry::closest_point(poly, pt);
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REQUIRE(result.x == 0.5);
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REQUIRE(result.y == 0.25);
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REQUIRE(result.distance == 0.0);
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}
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{
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// point outside polygon
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mapnik::geometry::point<double> pt {1.25, 0.5};
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auto result = mapnik::geometry::closest_point(poly, pt);
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REQUIRE(result.x == 1.0);
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REQUIRE(result.y == 0.5);
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REQUIRE(result.distance == 0.25);
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}
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{
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// point outside polygon
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mapnik::geometry::point<double> pt {4.0, 5.0};
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auto result = mapnik::geometry::closest_point(poly, pt);
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REQUIRE(result.x == 1.0);
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REQUIRE(result.y == 1.0);
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REQUIRE(result.distance == 5.0);
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}
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{
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// point on polygon boundary
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mapnik::geometry::point<double> pt {0, 0.4};
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auto result = mapnik::geometry::closest_point(poly, pt);
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REQUIRE(result.x == 0.0);
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REQUIRE(result.y == 0.4);
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REQUIRE(result.distance == 0.0);
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}
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}
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#endif
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}
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