SFML/test/Graphics/CircleShape.test.cpp

#include <SFML/Graphics/CircleShape.hpp>

#include <catch2/catch_test_macros.hpp>

#include <SystemUtil.hpp>
#include <type_traits>

TEST_CASE("[Graphics] sf::CircleShape")
{
    SECTION("Type traits")
    {
        STATIC_CHECK(std::is_copy_constructible_v<sf::CircleShape>);
        STATIC_CHECK(std::is_copy_assignable_v<sf::CircleShape>);
        STATIC_CHECK(std::is_nothrow_move_constructible_v<sf::CircleShape>);
        STATIC_CHECK(std::is_nothrow_move_assignable_v<sf::CircleShape>);
    }

    SECTION("Default constructor")
    {
        const sf::CircleShape circle;
        CHECK(circle.getRadius() == 0.f);
        CHECK(circle.getPointCount() == 30);
        for (std::size_t i = 0; i < circle.getPointCount(); ++i)
            CHECK(circle.getPoint(i) == sf::Vector2f(0, 0));
        CHECK(circle.getGeometricCenter() == sf::Vector2f(0, 0));
    }

    SECTION("Radius constructor")
    {
        const sf::CircleShape circle(15.f);
        CHECK(circle.getRadius() == 15.f);
        CHECK(circle.getPointCount() == 30);
        CHECK(circle.getPoint(0) == Approx(sf::Vector2f(15, 0)));
        CHECK(circle.getPoint(1) == Approx(sf::Vector2f(18.118675232f, 0.327785492f)));
        CHECK(circle.getPoint(2) == Approx(sf::Vector2f(21.101049423f, 1.296817780f)));
        CHECK(circle.getPoint(3) == Approx(sf::Vector2f(23.816780090f, 2.864745140f)));
        CHECK(circle.getPoint(4) == Approx(sf::Vector2f(26.147172928f, 4.963042259f)));
        CHECK(circle.getPoint(5) == Approx(sf::Vector2f(27.990381241f, 7.500000000f)));
        CHECK(circle.getPoint(6) == Approx(sf::Vector2f(29.265848160f, 10.364745140f)));
        CHECK(circle.getPoint(7) == Approx(sf::Vector2f(29.917827606f, 13.432072639f)));
        CHECK(circle.getPoint(8) == Approx(sf::Vector2f(29.917827606f, 16.567928314f)));
        CHECK(circle.getPoint(9) == Approx(sf::Vector2f(29.265846252f, 19.635257721f)));
        CHECK(circle.getPoint(10) == Approx(sf::Vector2f(27.990381241f, 22.500000000f)));
        CHECK(circle.getPoint(11) == Approx(sf::Vector2f(26.147171021f, 25.036960602f)));
        CHECK(circle.getPoint(12) == Approx(sf::Vector2f(23.816780090f, 27.135253906f)));
        CHECK(circle.getPoint(13) == Approx(sf::Vector2f(21.101049423f, 28.703182220f)));
        CHECK(circle.getPoint(14) == Approx(sf::Vector2f(18.118675232f, 29.672214508f)));
        CHECK(circle.getPoint(15) == Approx(sf::Vector2f(14.999999046f, 30.000000000f)));
        CHECK(circle.getPoint(16) == Approx(sf::Vector2f(11.881320953f, 29.672214508f)));
        CHECK(circle.getPoint(17) == Approx(sf::Vector2f(8.898950577f, 28.703182220f)));
        CHECK(circle.getPoint(18) == Approx(sf::Vector2f(6.183218956f, 27.135253906f)));
        CHECK(circle.getPoint(19) == Approx(sf::Vector2f(3.852828979f, 25.036960602f)));
        CHECK(circle.getPoint(20) == Approx(sf::Vector2f(2.009618759f, 22.500000000f)));
        CHECK(circle.getPoint(21) == Approx(sf::Vector2f(0.734152794f, 19.635255814f)));
        CHECK(circle.getPoint(22) == Approx(sf::Vector2f(0.082171440f, 16.567928314f)));
        CHECK(circle.getPoint(23) == Approx(sf::Vector2f(0.082171440f, 13.432073593f)));
        CHECK(circle.getPoint(24) == Approx(sf::Vector2f(0.734151840f, 10.364746094f)));
        CHECK(circle.getPoint(25) == Approx(sf::Vector2f(2.009618759f, 7.500000000f)));
        CHECK(circle.getPoint(26) == Approx(sf::Vector2f(3.852827072f, 4.963040352f)));
        CHECK(circle.getPoint(27) == Approx(sf::Vector2f(6.183218002f, 2.864748001f)));
        CHECK(circle.getPoint(28) == Approx(sf::Vector2f(8.898950577f, 1.296818733f)));
        CHECK(circle.getPoint(29) == Approx(sf::Vector2f(11.881320953f, 0.327786446f)));
        CHECK(circle.getGeometricCenter() == sf::Vector2f(15.f, 15.f));
    }

    SECTION("Radius and point count constructor")
    {
        const sf::CircleShape circle(5.f, 8);
        CHECK(circle.getRadius() == 5.f);
        CHECK(circle.getPointCount() == 8);
        CHECK(circle.getPoint(0) == Approx(sf::Vector2f(5.000000000f, 0.000000000f)));
        CHECK(circle.getPoint(1) == Approx(sf::Vector2f(8.535533905f, 1.464465857f)));
        CHECK(circle.getPoint(2) == Approx(sf::Vector2f(10.000000000f, 5.000000000f)));
        CHECK(circle.getPoint(3) == Approx(sf::Vector2f(8.535533905f, 8.535533905f)));
        CHECK(circle.getPoint(4) == Approx(sf::Vector2f(5.000000000f, 10.000000000f)));
        CHECK(circle.getPoint(5) == Approx(sf::Vector2f(1.464466095f, 8.535533905f)));
        CHECK(circle.getPoint(6) == Approx(sf::Vector2f(0.000000000f, 4.999999523f)));
        CHECK(circle.getPoint(7) == Approx(sf::Vector2f(1.464465857f, 1.464466572f)));
        CHECK(circle.getGeometricCenter() == sf::Vector2f(5.f, 5.f));
    }

    SECTION("Set radius")
    {
        sf::CircleShape circle(1.f, 6);
        circle.setRadius(10.f);
        CHECK(circle.getRadius() == 10.f);
        CHECK(circle.getPointCount() == 6);
        CHECK(circle.getPoint(0) == Approx(sf::Vector2f(10.000000000f, 0.000000000f)));
        CHECK(circle.getPoint(1) == Approx(sf::Vector2f(18.660253525f, 5.000000000f)));
        CHECK(circle.getPoint(2) == Approx(sf::Vector2f(18.660253525f, 15.000000000f)));
        CHECK(circle.getPoint(3) == Approx(sf::Vector2f(10.000000000f, 20.000000000f)));
        CHECK(circle.getPoint(4) == Approx(sf::Vector2f(1.339746475f, 15.000000000f)));
        CHECK(circle.getPoint(5) == Approx(sf::Vector2f(1.339745522f, 5.000000000f)));
        CHECK(circle.getGeometricCenter() == sf::Vector2f(10.f, 10.f));
    }

    SECTION("Set point count")
    {
        sf::CircleShape circle(4.f, 10);
        circle.setPointCount(4);
        CHECK(circle.getRadius() == 4.f);
        CHECK(circle.getPointCount() == 4);
        CHECK(circle.getPoint(0) == Approx(sf::Vector2f(3.999999762f, 0.000000000f)));
        CHECK(circle.getPoint(1) == Approx(sf::Vector2f(8.000000000f, 4.000000000f)));
        CHECK(circle.getPoint(2) == Approx(sf::Vector2f(3.999999762f, 8.000000000f)));
        CHECK(circle.getPoint(3) == Approx(sf::Vector2f(0.000000000f, 3.999999762f)));
        CHECK(circle.getGeometricCenter() == sf::Vector2f(4.f, 4.f));
    }

    SECTION("Equilateral triangle")
    {
        const sf::CircleShape triangle(2.f, 3);
        CHECK(triangle.getRadius() == 2.f);
        CHECK(triangle.getPointCount() == 3);
        CHECK(triangle.getPoint(0) == Approx(sf::Vector2f(1.999999881f, 0.000000000f)));
        CHECK(triangle.getPoint(1) == Approx(sf::Vector2f(3.732050896f, 3.000000000f)));
        CHECK(triangle.getPoint(2) == Approx(sf::Vector2f(0.267949224f, 3.000000000f)));
        CHECK(triangle.getGeometricCenter() == sf::Vector2f(2.f, 2.f));
    }

    SECTION("Geometric center")
    {
        SECTION("2 points")
        {
            CHECK(sf::CircleShape(2.f, 2).getGeometricCenter() == sf::Vector2f(2.f, 2.f));
        }

        SECTION("3 points")
        {
            CHECK(sf::CircleShape(4.f, 3).getGeometricCenter() == sf::Vector2f(4.f, 4.f));
        }
    }
}