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Fixed Polygon::centroid()
Ported Polygon unit tests from Perl to C++.
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4 changed files with 122 additions and 87 deletions
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@ -5,6 +5,112 @@
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using namespace Slic3r;
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SCENARIO("Converted Perl tests", "[Polygon]") {
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GIVEN("ccw_square") {
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Polygon ccw_square{ { 100, 100 }, { 200, 100 }, { 200, 200 }, { 100, 200 } };
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Polygon cw_square(ccw_square);
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cw_square.reverse();
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THEN("ccw_square is valid") {
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REQUIRE(ccw_square.is_valid());
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}
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THEN("cw_square is valid") {
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REQUIRE(cw_square.is_valid());
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}
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THEN("ccw_square.area") {
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REQUIRE(ccw_square.area() == 100 * 100);
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}
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THEN("cw_square.area") {
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REQUIRE(cw_square.area() == - 100 * 100);
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}
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THEN("ccw_square.centroid") {
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REQUIRE(ccw_square.centroid() == Point { 150, 150 });
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}
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THEN("cw_square.centroid") {
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REQUIRE(cw_square.centroid() == Point { 150, 150 });
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}
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THEN("ccw_square.contains_point(150, 150)") {
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REQUIRE(ccw_square.contains({ 150, 150 }));
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}
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THEN("cw_square.contains_point(150, 150)") {
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REQUIRE(cw_square.contains({ 150, 150 }));
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}
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THEN("conversion to lines") {
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REQUIRE(ccw_square.lines() == Lines{
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{ { 100, 100 }, { 200, 100 } },
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{ { 200, 100 }, { 200, 200 } },
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{ { 200, 200 }, { 100, 200 } },
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{ { 100, 200 }, { 100, 100 } } });
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}
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THEN("split_at_first_point") {
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REQUIRE(ccw_square.split_at_first_point() == Polyline { ccw_square[0], ccw_square[1], ccw_square[2], ccw_square[3], ccw_square[0] });
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}
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THEN("split_at_index(2)") {
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REQUIRE(ccw_square.split_at_index(2) == Polyline { ccw_square[2], ccw_square[3], ccw_square[0], ccw_square[1], ccw_square[2] });
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}
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THEN("split_at_vertex(ccw_square[2])") {
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REQUIRE(ccw_square.split_at_vertex(ccw_square[2]) == Polyline { ccw_square[2], ccw_square[3], ccw_square[0], ccw_square[1], ccw_square[2] });
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}
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THEN("is_counter_clockwise") {
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REQUIRE(ccw_square.is_counter_clockwise());
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}
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THEN("! is_counter_clockwise") {
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REQUIRE(! cw_square.is_counter_clockwise());
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}
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THEN("make_counter_clockwise") {
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cw_square.make_counter_clockwise();
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REQUIRE(cw_square.is_counter_clockwise());
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}
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THEN("make_counter_clockwise^2") {
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cw_square.make_counter_clockwise();
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cw_square.make_counter_clockwise();
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REQUIRE(cw_square.is_counter_clockwise());
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}
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THEN("first_point") {
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REQUIRE(&ccw_square.first_point() == &ccw_square.points.front());
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}
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}
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GIVEN("Triangulating hexagon") {
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Polygon hexagon{ { 100, 0 } };
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for (size_t i = 1; i < 6; ++ i) {
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Point p = hexagon.points.front();
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p.rotate(PI / 3 * i);
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hexagon.points.emplace_back(p);
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}
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Polygons triangles;
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hexagon.triangulate_convex(&triangles);
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THEN("right number of triangles") {
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REQUIRE(triangles.size() == 4);
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}
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THEN("all triangles are ccw") {
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auto it = std::find_if(triangles.begin(), triangles.end(), [](const Polygon &tri) { return tri.is_clockwise(); });
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REQUIRE(it == triangles.end());
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}
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}
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GIVEN("General triangle") {
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Polygon polygon { { 50000000, 100000000 }, { 300000000, 102000000 }, { 50000000, 104000000 } };
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Line line { { 175992032, 102000000 }, { 47983964, 102000000 } };
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Point intersection;
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bool has_intersection = polygon.intersection(line, &intersection);
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THEN("Intersection with line") {
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REQUIRE(has_intersection);
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REQUIRE(intersection == Point { 50000000, 102000000 });
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}
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}
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}
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TEST_CASE("Centroid of Trapezoid must be inside", "[Polygon][Utils]")
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{
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Slic3r::Polygon trapezoid {
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{ 4702134, 1124765853 },
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{ -4702134, 1124765853 },
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{ -9404268, 1049531706 },
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{ 9404268, 1049531706 },
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};
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Point centroid = trapezoid.centroid();
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CHECK(trapezoid.contains(centroid));
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}
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// This test currently only covers remove_collinear_points.
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// All remaining tests are to be ported from xs/t/06_polygon.t
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