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using Microsoft.Xna.Framework;
using Xunit;
namespace MonoGame.Extended.Tests.Primitives
{
public class RectangleFTests
{
[Fact]
public void Rectangle_Intersects_Test()
{
var rect1 = new Rectangle(0, 0, 32, 32);
var rect2 = new Rectangle(32, 32, 32, 32);
Assert.False(rect1.Intersects(rect2));
}
[Fact]
public void PassVector2AsConstructorParameter_Test()
{
var rect1 = new RectangleF(new Vector2(0, 0), new Size2(12.34f, 56.78f));
var rect2 = new RectangleF(new Vector2(0, 0), new Vector2(12.34f, 56.78f));
Assert.Equal(rect1, rect2);
}
[Fact]
public void PassPointAsConstructorParameter_Test()
{
var rect1 = new RectangleF(new Vector2(0, 0), new Size2(12, 56));
var rect2 = new RectangleF(new Vector2(0, 0), new Size2(12, 56));
Assert.Equal(rect1, rect2);
}
public class Transform
{
[Fact]
public void Center_point_is_not_translated()
{
var rectangle = new RectangleF(new Point2(0, 0), new Size2(20, 30));
var transform = Matrix2.Identity;
var result = RectangleF.Transform(rectangle, ref transform);
Assert.Equal(new Point2(10, 15), result.Center);
}
[Fact]
public void Center_point_is_translated()
{
var rectangleF = new RectangleF(new Point2(0, 0), new Size2(20, 30));
var transform = Matrix2.CreateTranslation(1, 2);
var result = RectangleF.Transform(rectangleF, ref transform);
Assert.Equal(new Point2(11, 17), result.Center);
}
[Fact]
public void Size_is_not_changed_by_identity_transform()
{
var rectangle = new RectangleF(new Point2(0, 0), new Size2(20, 30));
var transform = Matrix2.Identity;
var result = RectangleF.Transform(rectangle, ref transform);
Assert.Equal(new Size2(20, 30), result.Size);
}
[Fact]
public void Size_is_not_changed_by_translation()
{
var rectangle = new RectangleF(new Point2(0, 0), new Size2(20, 30));
var transform = Matrix2.CreateTranslation(1, 2);
var result = RectangleF.Transform(rectangle, ref transform);
Assert.Equal(new Size2(20, 30), result.Size);
}
[Fact]
public void Applies_rotation_and_translation()
{
/* Rectangle with center point aligned in coordinate system with origin 0.
*
* :
* :
* +-+
* | |
* |p|
* | |
* ...............0-+............
* :
* :
* :
*
* Rotate 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 RectangleF(new Point2(0, 0), new Size2(2, 4));
var transform =
Matrix2.CreateRotationZ(MathHelper.PiOver2)
*
Matrix2.CreateTranslation(10, 20);
var result = RectangleF.Transform(rectangle, ref transform);
Assert.Equal(-2 + 10, result.Center.X, 6);
Assert.Equal(1 + 20, result.Center.Y, 6);
Assert.Equal(4, result.Size.Width, 6);
Assert.Equal(2, result.Size.Height, 6);
}
}
}
}
|
