public SnapBase FindSnapPoint(Point hit)
{
List <SnapBase> candidates = new List <SnapBase>();
foreach (Layer la in LayerCollection.FindAll(la => la.visible))
{
SnapBase obj = la.GetHitObject(hit) as SnapBase;
if (obj != null)
{
candidates.Add(obj);
}
if (candidates.Count > 0)
{
return(candidates.OrderBy(p => p.Distance2(hit)).First());
}
}
return(null);
}