/// <summary>
/// Returns the trimmed line at which the borders of the two rects collides
/// </summary>
/// <param name="secondRect"></param>
/// <returns></returns>
public Line2?BorderIntersection(AxisAlignedRectangle secondRect)
{
if (IntersectsWith(secondRect))
{
throw new ArgumentException("Rects are overlapping");
}
return
(Borders.SelectMany(a => secondRect.Borders.Select(b => new { A = a, B = b }))
.Select(pair => pair.A.GetIntersectionLine(pair.B))
.Where(line => line.HasValue && !line.Value.IsPoint)
.FirstOrDefault(line => line.HasValue));
}
/// <summary>
/// Returns the intersection area of both rectangles
/// </summary>
public AxisAlignedRectangle?Intersection(AxisAlignedRectangle secondRect)
{
// TODO: implement this natively to prevent the loss of precision
var intersection = ToRectangleF();
intersection.Intersect(secondRect.ToRectangleF());
if (intersection.IsEmpty)
{
return(null);
}
return(new AxisAlignedRectangle()
{
TopLeft = new Vector2(intersection.Left, intersection.Top),
BottomRight = new Vector2(intersection.Right, intersection.Bottom)
});
}
/// <summary>
/// True if both rectangles are intersecting
/// </summary>
/// <param name="secondRect"></param>
/// <returns></returns>
public bool IntersectsWith(AxisAlignedRectangle secondRect)
{
return(Intersection(secondRect) != null);
}