122 lines
3.2 KiB
C++
122 lines
3.2 KiB
C++
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#include "catch.hpp"
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#include <mapnik/grid_vertex_converter.hpp>
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TEST_CASE("spiral_iterator") {
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SECTION("sprial 3x3") {
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mapnik::geometry::spiral_iterator si(3);
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const mapnik::geometry::point<int> points[] = {
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{ 0, 0 }, { 1, 0 }, { 1, -1 },
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{ 0, -1 }, { -1, -1 }, { -1, 0 },
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{ -1, 1 }, { 0, 1 }, { 1, 1 } };
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const std::size_t points_size = std::extent<decltype(points)>::value;
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int x, y;
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std::size_t index = 0;
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while (si.vertex(&x, &y))
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{
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REQUIRE(index < points_size);
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CHECK(x == points[index].x);
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CHECK(y == points[index].y);
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index++;
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}
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CHECK(index == points_size);
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}
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}
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TEST_CASE("grid_vertex_converter") {
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SECTION("empty polygon") {
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mapnik::geometry::polygon<double> poly;
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using path_type = mapnik::geometry::polygon_vertex_adapter<double>;
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path_type path(poly);
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using converter_type = mapnik::geometry::grid_vertex_converter<path_type, double>;
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converter_type gvc(path, 10.0, 10.0, 1.0);
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double x, y;
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unsigned cmd = gvc.vertex(&x, &y);
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CHECK(cmd == mapnik::SEG_END);
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}
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SECTION("empty polygon exterior ring") {
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mapnik::geometry::polygon<double> poly;
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poly.emplace_back();
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using path_type = mapnik::geometry::polygon_vertex_adapter<double>;
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path_type path(poly);
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using converter_type = mapnik::geometry::grid_vertex_converter<path_type, double>;
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converter_type gvc(path, 10.0, 10.0, 1.0);
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double x, y;
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unsigned cmd = gvc.vertex(&x, &y);
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CHECK(cmd == mapnik::SEG_END);
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}
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SECTION("grid of a square") {
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mapnik::geometry::polygon<double> poly;
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poly.emplace_back();
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auto & exterior_ring = poly.front();
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exterior_ring.emplace_back(-10, -10);
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exterior_ring.emplace_back( 10, -10);
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exterior_ring.emplace_back( 10, 10);
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exterior_ring.emplace_back(-10, 10);
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exterior_ring.emplace_back(-10, -10);
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using path_type = mapnik::geometry::polygon_vertex_adapter<double>;
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path_type path(poly);
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using converter_type = mapnik::geometry::grid_vertex_converter<path_type, double>;
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converter_type gvc(path, 3.0, 3.0, 1.0);
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const mapnik::geometry::point<double> points[] = {
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{ 0, 0 }, { 3, 0 }, { 3, 3 }, { 0, 3 },
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{ -3, 3 }, { -3, 0 }, { -3, -3 }, { 0, -3 },
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{ 3, -3 }, { 6, -3 }, { 6, 0 }, { 6, 3 },
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{ 6, 6 }, { 3, 6 }, { 0, 6 }, { -3, 6 },
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{ -6, 6 }, { -6, 3 }, { -6, 0 }, { -6, -3 },
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{ -6, -6 }, { -3, -6 }, { 0, -6 }, { 3, -6 },
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{ 6, -6 }, { 9, -6 }, { 9, -3 }, { 9, 0 },
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{ 9, 3 }, { 9, 6 }, { 9, 9 }, { 6, 9 },
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{ 3, 9 }, { 0, 9 }, { -3, 9 }, { -6, 9 },
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{ -9, 9 }, { -9, 6 }, { -9, 3 }, { -9, 0 },
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{ -9, -3 }, { -9, -6 }, { -9, -9 }, { -6, -9 },
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{ -3, -9 }, { 0, -9 }, { 3, -9 }, { 6, -9 },
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{ 9, -9 } };
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const std::size_t points_size = std::extent<decltype(points)>::value;
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double x, y;
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unsigned cmd = mapnik::SEG_END;
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std::size_t index = 0;
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while ((cmd = gvc.vertex(&x, &y)) != mapnik::SEG_END)
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{
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REQUIRE(index < points_size);
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CHECK(cmd == mapnik::SEG_MOVETO);
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CHECK(x == Approx(points[index].x));
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CHECK(y == Approx(points[index].y));
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index++;
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}
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CHECK(index == points_size);
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CHECK(cmd == mapnik::SEG_END);
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}
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}
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