public KDNode FindNearestPoint(Point2D x)
{
if (Root == null)
{
return(null);
}
checkedNodesNum = 0;
KDNode parent = Root.FindParent(x);
nearestPoint = parent;
minDistanceValue = Root.Distance(x, parent.x, 2);
if (parent.Equal(x, parent.x, 2) == true)
{
return(nearestPoint);
}
SearchParent(parent, x);
Uncheck();
return(nearestPoint);
}