diff options
Diffstat (limited to 'Plugins/MonoGame.Extended/tests/MonoGame.Extended.Tests/Primitives/OrientedRectangleTests.cs')
| -rw-r--r-- | Plugins/MonoGame.Extended/tests/MonoGame.Extended.Tests/Primitives/OrientedRectangleTests.cs | 234 |
1 files changed, 234 insertions, 0 deletions
diff --git a/Plugins/MonoGame.Extended/tests/MonoGame.Extended.Tests/Primitives/OrientedRectangleTests.cs b/Plugins/MonoGame.Extended/tests/MonoGame.Extended.Tests/Primitives/OrientedRectangleTests.cs new file mode 100644 index 0000000..e3b40c8 --- /dev/null +++ b/Plugins/MonoGame.Extended/tests/MonoGame.Extended.Tests/Primitives/OrientedRectangleTests.cs @@ -0,0 +1,234 @@ +using System.Collections.Generic; +using Microsoft.Xna.Framework; +using Xunit; +using Vector2 = Microsoft.Xna.Framework.Vector2; + +namespace MonoGame.Extended.Tests.Primitives; + +public class OrientedRectangleTests +{ + [Fact] + public void Initializes_oriented_rectangle() + { + var rectangle = new OrientedRectangle(new Point2(1, 2), new Size2(3, 4), new Matrix2(5, 6, 7, 8, 9, 10)); + + Assert.Equal(new Point2(1, 2), rectangle.Center); + Assert.Equal(new Vector2(3, 4), rectangle.Radii); + Assert.Equal(new Matrix2(5, 6, 7, 8, 9, 10), rectangle.Orientation); + CollectionAssert.Equal( + new List<Vector2> + { + new(-3, -2), + new(-33, -38), + new(23, 26), + new(53, 62) + }, + rectangle.Points); + } + + public static readonly IEnumerable<object[]> _equalsComparisons = new[] + { + new object[] + { + "empty compared with empty is true", + new OrientedRectangle(Point2.Zero, Size2.Empty, Matrix2.Identity), + new OrientedRectangle(Point2.Zero, Size2.Empty, Matrix2.Identity) + }, + new object[] + { + "initialized compared with initialized true", + new OrientedRectangle(new Point2(1, 2), new Size2(3, 4), new Matrix2(5, 6, 7, 8, 9, 10)), + new OrientedRectangle(new Point2(1, 2), new Size2(3, 4), new Matrix2(5, 6, 7, 8, 9, 10)) + } + }; + + [Theory] + [MemberData(nameof(_equalsComparisons))] +#pragma warning disable xUnit1026 + public void Equals_comparison(string name, OrientedRectangle first, OrientedRectangle second) +#pragma warning restore xUnit1026 + { + Assert.True(first == second); + Assert.False(first != second); + } + + public class Transform + { + [Fact] + public void Center_point_is_not_translated() + { + var rectangle = new OrientedRectangle(new Point2(1, 2), new Size2(), Matrix2.Identity); + var transform = Matrix2.Identity; + + var result = OrientedRectangle.Transform(rectangle, ref transform); + + Assert.Equal(new Point2(1, 2), result.Center); + } + + [Fact] + public void Center_point_is_translated() + { + var rectangle = new OrientedRectangle(new Point2(0, 0), new Size2(), new Matrix2()); + var transform = Matrix2.CreateTranslation(1, 2); + + var result = OrientedRectangle.Transform(rectangle, ref transform); + + Assert.Equal(new Point2(1, 2), result.Center); + } + + [Fact] + public void Radii_is_not_changed_by_identity_transform() + { + var rectangle = new OrientedRectangle(new Point2(), new Size2(10, 20), new Matrix2()); + var transform = Matrix2.Identity; + + var result = OrientedRectangle.Transform(rectangle, ref transform); + + Assert.Equal(new Vector2(10, 20), result.Radii); + } + + [Fact] + public void Radii_is_not_changed_by_translation() + { + var rectangle = new OrientedRectangle(new Point2(1, 2), new Size2(10, 20), new Matrix2()); + var transform = Matrix2.CreateTranslation(1, 2); + + var result = OrientedRectangle.Transform(rectangle, ref transform); + + Assert.Equal(new Vector2(10, 20), result.Radii); + } + + [Fact] + public void Orientation_is_rotated_45_degrees_left() + { + var rectangle = new OrientedRectangle(new Point2(), new Size2(), Matrix2.Identity); + var transform = Matrix2.CreateRotationZ(MathHelper.PiOver4); + + var result = OrientedRectangle.Transform(rectangle, ref transform); + + Assert.Equal(new Point2(), result.Center); + Assert.Equal(new Vector2(), result.Radii); + Assert.Equal(Matrix2.CreateRotationZ(MathHelper.PiOver4), result.Orientation); + } + + [Fact] + public void Orientation_is_rotated_to_45_degrees_from_180() + { + var rectangle = new OrientedRectangle(new Point2(), new Size2(), Matrix2.CreateRotationZ(MathHelper.Pi)); + var transform = Matrix2.CreateRotationZ(-3 * MathHelper.PiOver4); + var expectedOrientation = Matrix2.CreateRotationZ(MathHelper.PiOver4); + + var result = OrientedRectangle.Transform(rectangle, ref transform); + + Assert.Equal(new Point2(), result.Center); + Assert.Equal(new Vector2(), result.Radii); + Assert.Equal(expectedOrientation.M11, result.Orientation.M11, 6); + Assert.Equal(expectedOrientation.M12, result.Orientation.M12, 6); + Assert.Equal(expectedOrientation.M21, result.Orientation.M21, 6); + Assert.Equal(expectedOrientation.M22, result.Orientation.M22, 6); + Assert.Equal(expectedOrientation.M31, result.Orientation.M31, 6); + Assert.Equal(expectedOrientation.M32, result.Orientation.M32, 6); + } + + [Fact] + public void Points_are_same_as_center() + { + var rectangle = new OrientedRectangle(new Point2(1, 2), new Size2(), Matrix2.Identity); + var transform = Matrix2.Identity; + + var result = OrientedRectangle.Transform(rectangle, ref transform); + + CollectionAssert.Equal( + new List<Vector2> + { + new(1, 2), + new(1, 2), + new(1, 2), + new(1, 2) + }, + result.Points); + } + + [Fact] + public void Points_are_translated() + { + var rectangle = new OrientedRectangle(new Point2(0, 0), new Size2(2, 4), Matrix2.Identity); + var transform = Matrix2.CreateTranslation(10, 20); + + var result = OrientedRectangle.Transform(rectangle, ref transform); + + CollectionAssert.Equal( + new List<Vector2> + { + new(8, 16), + new(8, 24), + new(12, 24), + new(12, 16) + }, + result.Points); + } + + [Fact] + public void Applies_rotation_and_translation() + { + /* Rectangle with center point p, aligned in coordinate system with origin 0. + * + * : + * : + * +-+ + * | | + * |p| + * | | + * ...............0-+............ + * : + * : + * : + * + * Rotate around center point p, 90 degrees around origin 0. + * + * : + * : + * +---+ + * | p | + * ...........+---0.............. + * : + * : + * : + * + * Then translate rectangle by x=10 and y=20. + * : + * : +---+ + * : | p | + * y=21 - - - - - - - -> +---+ + * . + * : + * ...............0.............. + * : + * : + * : + */ + var rectangle = new OrientedRectangle(new Point2(1, 2), new Size2(2, 4), Matrix2.Identity); + var transform = + Matrix2.CreateRotationZ(MathHelper.PiOver2) + * + Matrix2.CreateTranslation(10, 20); + + var result = OrientedRectangle.Transform(rectangle, ref transform); + + Assert.Equal(8, result.Center.X, 6); + Assert.Equal(21, result.Center.Y, 6); + Assert.Equal(2, result.Radii.X, 6); + Assert.Equal(4, result.Radii.Y, 6); + Assert.Equal(Matrix2.CreateRotationZ(MathHelper.PiOver2), result.Orientation); + CollectionAssert.Equal( + new List<Vector2> + { + new(4, 23), + new(4, 19), + new(12, 19), + new(12, 23) + }, + result.Points); + } + } +} |