private List <ObjAndNode <NodeType> > FindNearestRectToPoint(Point p, NodeType node)
{
List <ObjAndNode <NodeType> > answer_list = new List <ObjAndNode <NodeType> >();
SimplePriorityQueue <NodeType> searching_nodes = new SimplePriorityQueue <NodeType>();
searching_nodes.Enqueue(node, 0);
RectangleObj answer = null;
NodeType answer_node = default(NodeType);
double min_distance_sq = region_width * region_width;
while (searching_nodes.Count > 0)
{
NodeType current_node = searching_nodes.Dequeue();
Dictionary <RectangleObj, double> nearest_rect = current_node.GetNearestRectangle(p);
if (nearest_rect.Count > 0)
{
foreach (KeyValuePair <RectangleObj, double> entry in nearest_rect)
{
if (entry.Value <= min_distance_sq || entry.Value < 0.01)
{
min_distance_sq = entry.Value;
answer = entry.Key;
answer_node = current_node;
if (min_distance_sq < 0.01)
{
ObjAndNode <NodeType> ans = new ObjAndNode <NodeType>();
ans.node = answer_node;
ans.rect = answer;
answer_list.Add(ans);
answer = null;
}
}
}
}
if (current_node.HasChildren())
{
foreach (KeyValuePair <int, NodeType> child in current_node.getChildern())
{
NodeType child_node = child.Value;
RectangleObj field_rect = new RectangleObj();
field_rect.SetRectangleByCenter(child_node.getCenter(), child_node.getNodeSize(), child_node.getNodeSize());
double field_dist = field_rect.GetDistanceSqToPoint(p);
if (field_dist <= min_distance_sq)
{
searching_nodes.Enqueue(child_node, (float)field_dist);
}
}
}
}
if (answer != null)
{
ObjAndNode <NodeType> ans = new ObjAndNode <NodeType>();
ans.node = answer_node;
ans.rect = answer;
answer_list.Add(ans);
}
return(answer_list);
}
public PartitionNode(int node_layer, int size, Point center_coord, int cap)
{
Parents = new Dictionary <int, PartitionNode>();
Children = new Dictionary <int, PartitionNode>();
layerNum = node_layer;
bounds = new RectangleObj();
bounds.SetRectangleByCenter(center_coord, size, size);
capacity = cap;
}
public CoverNode(int size, Point center_coord, int cap, CoverNode node_parent, double p_value)
{
children = new Dictionary <int, CoverNode>();
bounds = new RectangleObj();
original_bounds = new RectangleObj();
capacity = cap;
parent = node_parent;
double expanded_size = (1.0 + p_value) * size;
original_bounds.SetRectangleByCenter(center_coord, size, size);
bounds.SetRectangleByCenter(center_coord, (int)expanded_size, (int)expanded_size);
pVal = p_value;
if (node_parent == null)
{
layerNum = 0;
}
else
{
layerNum = node_parent.layerNum + 1;
}
}
public List <RectangleObj> IncrementalNNFindNext()
{
// 1st entry is the object found, the rest are the bounding boxes of circular search steps.
List <RectangleObj> answer = new List <RectangleObj>();
Random rand = new Random();
while (incrNN_queue.Count > 0)
{
NodeOrObj current_element = incrNN_queue.Dequeue();
while (incrNN_queue.Count > 0 && incrNN_queue.First().Equals(current_element))
{
incrNN_queue.Dequeue();
}
if (current_element.IsObj())
{
double dist = current_element.GetObj().GetDistanceSqToPoint(incrNN_origin);
RectangleObj circleObj = new RectangleObj();
int radius = (int)(Math.Sqrt(dist) * 2.0);
circleObj.SetRectangleByCenter(incrNN_origin, radius, radius);
circleObj.rect_color = Color.Orange;
answer.Add(circleObj);
answer.Insert(0, current_element.GetObj());
return(answer);
}
else
{
NodeType current_node = current_element.GetNode();
double current_dist = current_node.GetBounds().GetDistanceSqToPoint(incrNN_origin);
RectangleObj circleObj = new RectangleObj();
int radius = (int)(Math.Sqrt(current_dist) * 2.0);
circleObj.SetRectangleByCenter(incrNN_origin, radius, radius);
Color col = Color.FromArgb(0, rand.Next(50, 256), rand.Next(50, 256));
circleObj.rect_color = col;
answer.Add(circleObj);
if (!current_node.IsEmpty())
{
foreach (RectangleObj obj in current_node.GetAllStoredObjs())
{
double distance = obj.GetDistanceSqToPoint(incrNN_origin);
if (distance >= current_dist)
{
NodeOrObj obj_nodeOrObj = new NodeOrObj();
obj_nodeOrObj.SetObj(obj);
incrNN_queue.Enqueue(obj_nodeOrObj, (float)distance);
}
}
}
if (current_node.HasChildren())
{
foreach (KeyValuePair <int, NodeType> child_node in current_node.getChildern())
{
double distance = child_node.Value.GetBounds().GetDistanceSqToPoint(incrNN_origin);
if (distance >= current_dist)
{
NodeOrObj node_nodeOrObj = new NodeOrObj();
node_nodeOrObj.SetNode(child_node.Value);
incrNN_queue.Enqueue(node_nodeOrObj, (float)distance);
}
}
}
}
}
return(answer);
}
