public void Intersect()
{
var rect1 = new Rect2d(0, 0, 100, 100);
var rect2 = new Rect2d(0, 0, 100, 100);
var intersect = rect1.Intersect(rect2);
Assert.Equal(new Rect2d(0, 0, 100, 100), intersect);
rect2 = new Rect2d(50, 0, 100, 100);
intersect = rect1.Intersect(rect2);
Assert.Equal(new Rect2d(50, 0, 50, 100), intersect);
rect2 = new Rect2d(100, 0, 100, 100);
intersect = rect1.Intersect(rect2);
Assert.Equal(new Rect2d(100, 0, 0, 100), intersect);
}