public static IEnumerable <Tuple <Corner, T> > Where <T>(this Corners <T> self, Func <Corner, T, bool> predicate)
{
if (predicate(Corner.LeftBottom, self.LeftBottom))
{
yield return(Tuple.Create(Corner.LeftBottom, self.LeftBottom));
}
if (predicate(Corner.LeftTop, self.LeftTop))
{
yield return(Tuple.Create(Corner.LeftTop, self.LeftTop));
}
if (predicate(Corner.RightBottom, self.RightBottom))
{
yield return(Tuple.Create(Corner.RightBottom, self.RightBottom));
}
if (predicate(Corner.RightTop, self.RightTop))
{
yield return(Tuple.Create(Corner.RightTop, self.RightTop));
}
}
public static bool CornersAreEqual <T>(this Corners <T> self)
{
return(self.LeftBottom.Equals(self.LeftTop) &&
self.LeftTop.Equals(self.RightBottom) &&
self.RightBottom.Equals(self.RightTop));
}
public static Corners <T> Inverse <T>(this Corners <T> self)
where T : INumeric <T>
{
return(self.Select(t => t.Inverse()));
}