protected Rect GetClosest(IEnumerable <Rect> rects, Rect rect, Vector direction)
{
// TODO Hack, offset the rect a little bit so there are not margin problems
var rectFixed = new Rect(rect.Left - .1f, rect.Top - .1f, rect.Right + .1f, rect.Bottom + .1f);
return(rects
.Select(r => new { rect = r, Score = ComputeScore(direction, rectFixed, r) })
.OrderByDescending(a => a.Score)
.FirstOrDefault(a => a.Score > 0)?.rect);
}
private static double ComputeScore(Vector lookDirection, Rect original, Rect target)
{
var targetCenter = target.Center + target.Size.Multiply(lookDirection / 2);
var originalCenter = original.Center + original.Size.Multiply(lookDirection / 2);
var relativePosition = targetCenter - originalCenter;
var distance = relativePosition.Length;
var direction = relativePosition.Normalized();
var dot = lookDirection * direction;
return(dot * (1 / distance));
}