private Dictionary <BUCoverNode <T>, SpatialObj <T> > FindNearestRectToPoint(Point p, BUCoverNode <T> node)
{
Dictionary <BUCoverNode <T>, SpatialObj <T> > answer_dict = new Dictionary <BUCoverNode <T>, SpatialObj <T> >();
SimplePriorityQueue <BUCoverNode <T> > searching_nodes = new SimplePriorityQueue <BUCoverNode <T> >();
searching_nodes.Enqueue(node, 0);
SpatialObj <T> answer = default(SpatialObj <T>);
BUCoverNode <T> answer_node = null;
bool used = false;
double min_distance_sq = rootNode.GetMaxDistance();
while (searching_nodes.Count > 0)
{
BUCoverNode <T> current_node = searching_nodes.Dequeue();
Dictionary <SpatialObj <T>, double> nearest_rect = current_node.GetNearestRectangle(p);
if (nearest_rect.Count > 0)
{
foreach (KeyValuePair <SpatialObj <T>, double> entry in nearest_rect)
{
if (entry.Value <= min_distance_sq || entry.Value < Statics.EPSILON)
{
min_distance_sq = entry.Value;
answer = entry.Key;
answer_node = current_node;
used = false;
if (min_distance_sq < Statics.EPSILON)
{
answer_dict.Add(answer_node, answer);
used = true;
}
}
}
}
if (current_node.HasChildren())
{
foreach (BUCoverNode <T> child in current_node.GetChildren())
{
double field_dist = child.GetDistanceToPointSq(p);
if (field_dist <= min_distance_sq)
{
searching_nodes.Enqueue(child, (float)field_dist);
}
}
}
}
if (!used)
{
answer_dict.Add(answer_node, answer);
}
return(answer_dict);
}