public void RectInitialization()
{
Rect2D r = Rect2D.FromExtents(0, 0, 10, 10);
Assert.AreEqual(new int2(0, 0), r.Position);
Assert.AreEqual(new int2(10, 10), r.Max);
Assert.AreEqual(new int2(10, 10), r.Size);
r = Rect2D.FromPositionSize(5, 5, 5, 5);
Assert.IsFalse(r.Intersect(new int2(0, 0)));
Assert.AreEqual(new int2(5, 5), r.Position);
Assert.AreEqual(new int2(5, 5), r.Size);
}