static public bool TryGetIntersection(this Rect item, Rect rect, out Rect intersection)
{
return(RectExtensions.TryCreateStrictMinMaxRect(
item.xMin.Max(rect.xMin),
item.yMin.Max(rect.yMin),
item.xMax.Min(rect.xMax),
item.yMax.Min(rect.yMax),
out intersection
));
}
static public IEnumerable <Rect> GetSubtraction(this Rect item, Rect to_subtract)
{
if (item.TryGetIntersection(to_subtract, out to_subtract) == false)
{
yield return(new Rect(item));
}
else
{
Rect left;
if (RectExtensions.TryCreateStrictMinMaxRect(
item.xMin, to_subtract.yMin,
to_subtract.xMin, to_subtract.yMax,
out left
))
{
yield return(left);
}
Rect right;
if (RectExtensions.TryCreateStrictMinMaxRect(
to_subtract.xMax, to_subtract.yMin,
item.xMax, to_subtract.yMax,
out right
))
{
yield return(right);
}
Rect bottom;
if (RectExtensions.TryCreateStrictMinMaxRect(
item.xMin, item.yMin,
item.xMax, to_subtract.yMin,
out bottom
))
{
yield return(bottom);
}
Rect top;
if (RectExtensions.TryCreateStrictMinMaxRect(
item.xMin, to_subtract.yMax,
item.xMax, item.yMax,
out top
))
{
yield return(top);
}
}
}
