private Rectangle?_intersectionAbs(Rectangle other)
{
Rectangle thisAbs = this.Abs, otherAbs = other.Abs;
double l = GMath.Max(thisAbs.Left, otherAbs.Left), r = GMath.Min(thisAbs.Right, otherAbs.Right),
t = GMath.Max(thisAbs.Top, otherAbs.Top), b = GMath.Min(thisAbs.Bottom, otherAbs.Bottom);
if (l > r || t > b)
{
return(null);
}
else
{
return(new Rectangle(l, t, r - l, b - t));
}
}