public List <RectangleObj> WindowQuery(RectangleObj window)
{
// Finds objects within a Rectangular range (window)
List <RectangleObj> answer = new List <RectangleObj>();
Queue <NodeType> searching_nodes = new Queue <NodeType>();
searching_nodes.Enqueue(root);
while (searching_nodes.Count > 0)
{
NodeType current_node = searching_nodes.Dequeue();
if (current_node.GetBounds().IntersectsWith(window))
{
answer.AddRange(current_node.GetRangeQueryObj(window));
if (current_node.HasChildren())
{
foreach (KeyValuePair <int, NodeType> child in current_node.getChildern())
{
if (!searching_nodes.Contains(child.Value))
{
searching_nodes.Enqueue(child.Value);
}
}
}
}
}
return(answer);
}
private void btnINNNext_Click(object sender, EventArgs e)
{
if (GetCurrentActionState() != ActionMode.IncrementalNN)
{
return;
}
List <RectangleObj> iin;
if (type_partition)
{
iin = rect_database_partition.IncrementalNNFindNext();
}
else
{
iin = rect_database_cover.IncrementalNNFindNext();
}
if (iin.Count > 0)
{
RectangleObj result = iin[0];
iin.RemoveAt(0);
dbCanvas.ClearHollowRectList();
dbCanvas.AddHollowRect(result);
dbCanvas.AddHollowCircles(iin);
}
dbCanvas.RedrawCanvas();
}
public NodeType FindContainingField(RectangleObj rect, NodeType starting_node)
{
Point node_center = starting_node.getCenter();
int node_size = starting_node.getNodeSize();
if (starting_node.IsPointInNode(rect.rect_center))
{
bool contained_in_node = rect.ContainedByArea(node_center, node_size, node_size);
if (contained_in_node)
{
if (node_size <= 1 || !starting_node.HasChildren() || rect.importance_layer == starting_node.GetLayerlevel() || Math.Max(rect.rect_width, rect.rect_height) > node_size / 2)
{
return(starting_node);
}
}
NodeType child_node = starting_node.LookupChild(rect.rect_center);
if (child_node != null)
{
NodeType answer_node = FindContainingField(rect, child_node);
if (answer_node != null)
{
return(answer_node);
}
}
if (contained_in_node)
{
return(starting_node);
}
}
return(default(NodeType));
}
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);
}
private void DbCanvas_rectAdded(object sender, RectangleObj e)
{
if (GetCurrentActionState() == ActionMode.Add)
{
e.importance_layer = Convert.ToInt32(tbImportance.Text);
if (type_partition)
{
rect_database_partition.AddRectangle(e);
}
else
{
rect_database_cover.AddRectangle(e);
}
}
else if (GetCurrentActionState() == ActionMode.WindowQuery)
{
List <RectangleObj> objs;
Stopwatch watch = Stopwatch.StartNew();
if (type_partition)
{
objs = rect_database_partition.WindowQuery(e);
}
else
{
objs = rect_database_cover.WindowQuery(e);
}
watch.Stop();
tbStopwatch.Text = watch.ElapsedMilliseconds.ToString();
if (objs.Count > 0)
{
dbCanvas.ClearHollowRectList();
dbCanvas.AddHollowRects(objs);
}
}
else // Range query
{
Point p = e.rect_center;
int radius = Math.Max(e.rect_height, e.rect_width) / 2;
List <RectangleObj> objs;
Stopwatch watch = Stopwatch.StartNew();
if (type_partition)
{
objs = rect_database_partition.RangeQuery(p, radius);
}
else
{
objs = rect_database_cover.RangeQuery(p, radius);
}
watch.Stop();
tbStopwatch.Text = watch.ElapsedMilliseconds.ToString();
if (objs.Count > 0)
{
dbCanvas.ClearHollowRectList();
dbCanvas.AddHollowRects(objs);
}
}
UpdateCanvasBounds();
}
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;
}
protected override void OnMouseUp(MouseEventArgs e)
{
base.OnMouseUp(e);
if ((action_status == ActionMode.Add || action_status == ActionMode.RangeQuery || action_status == ActionMode.WindowQuery) && is_draggin)
{
PointF prevPos = ConvertCoordFromScreen(mouse_down_pos.X, mouse_down_pos.Y);
PointF curPos = ConvertCoordFromScreen(current_mouse_pos.X, current_mouse_pos.Y);
Point pPos = new Point((int)prevPos.X, (int)prevPos.Y);
Point cPos = new Point((int)curPos.X, (int)curPos.Y);
RectangleObj newRectangle = new RectangleObj();
newRectangle.SetRectangleByCoords(pPos, cPos);
if (action_status == ActionMode.RangeQuery)
{
int rad = Math.Max(newRectangle.rect_height, newRectangle.rect_width);
newRectangle.UpdateWH(rad, rad);
}
newRectangle.rect_color = Color.FromArgb(rnd.Next(256), rnd.Next(256), rnd.Next(256));
newRectangle.importance_layer = -1;
OnRectangleAdded(newRectangle);
is_draggin = false;
RedrawCanvas();
}
else if (action_status == ActionMode.PointQuery || action_status == ActionMode.Remove || action_status == ActionMode.IncrementalNN)
{
PointF curPos = ConvertCoordFromScreen(e.Location.X, e.Location.Y);
OnPointQueryRequested(new Point((int)curPos.X, (int)curPos.Y));
if (action_status == ActionMode.IncrementalNN)
{
incrementalSet = true;
incrementalPos = e.Location;
}
else
{
incrementalSet = false;
}
}
else if (action_status == ActionMode.Move)
{
is_draggin = false;
OnPointQueryRequested(new Point(-1, -1));
RedrawCanvas();
}
}
public bool StoreRectangle(RectangleObj rect)
{
// Only potential Objs then can sink further go into overflow
bool overflow = Math.Max(rect.rect_width, rect.rect_height) <= getNodeSize() / 2 && rect.importance_layer > layerNum;
if (overflow)
{
overflowObjs.Add(rect);
}
else
{
storedObjs.Add(rect);
}
return(IsOverflown());
}
public List <RectangleObj> FindNearestObj(Point p)
{
List <RectangleObj> results = new List <RectangleObj>();
foreach (ObjAndNode <NodeType> entry in FindNearestRectToPoint(p, root))
{
RectangleObj rect1 = new RectangleObj(entry.rect);
rect1.rect_color = Color.Red;
RectangleObj rect2 = new RectangleObj(entry.node.GetBounds());
rect2.rect_color = Color.Red;
results.Add(rect1);
results.Add(rect2);
}
return(results);
}
public void InitMoving(Point p)
{
RectangleObj obj = new RectangleObj();
NodeType node = default(NodeType);
foreach (ObjAndNode <NodeType> entry in FindNearestRectToPoint(p, root))
{
obj = entry.rect;
node = entry.node;
}
if (node != null)
{
moving_node = node;
moving_obj = obj;
}
}
public RectangleObj FindNearestObjAndRemove(Point p)
{
RectangleObj obj = new RectangleObj();
NodeType node = default(NodeType);
foreach (ObjAndNode <NodeType> entry in FindNearestRectToPoint(p, root))
{
obj = entry.rect;
node = entry.node;
}
if (node != null)
{
return(RemoveRectangle(obj, node));
}
return(obj);
}
private void button1_Click(object sender, EventArgs e)
{
if (canvas_size < 0)
{
return;
}
int numRects = Convert.ToInt32(tbNumRects.Text);
int randSeed = Convert.ToInt32(tbRandSeed.Text);
Random rand = new Random(randSeed);
List <RectangleObj> rects = new List <RectangleObj>();
for (int i = 0; i < numRects; i++)
{
int x1 = rand.Next(1, canvas_size);
int y1 = rand.Next(1, canvas_size);
int x2 = rand.Next(1, canvas_size);
int y2 = rand.Next(1, canvas_size);
RectangleObj rect = new RectangleObj();
rect.SetRectangleByCoords(new Point(x1, y1), new Point(x2, y2));
rect.importance_layer = Convert.ToInt32(tbImportance.Text);
rect.rect_color = Color.FromArgb(rand.Next(256), rand.Next(256), rand.Next(256));
rects.Add(rect);
}
Stopwatch watch = Stopwatch.StartNew();
if (type_partition)
{
rect_database_partition.AddManyRectangles(rects);
}
else
{
rect_database_cover.AddManyRectangles(rects);
}
watch.Stop();
tbStopwatch.Text = watch.ElapsedMilliseconds.ToString();
UpdateCanvasBounds();
}
public List <RectangleObj> GetRangeQueryObj(RectangleObj window)
{
List <RectangleObj> objs = new List <RectangleObj>();
foreach (RectangleObj rect in storedObjs)
{
if (rect.ContainedByArea(window.rect_center, window.rect_width, window.rect_height))
{
objs.Add(rect);
}
}
foreach (RectangleObj rect in overflowObjs)
{
if (rect.ContainedByArea(window.rect_center, window.rect_width, window.rect_height))
{
objs.Add(rect);
}
}
return(objs);
}
public Dictionary <RectangleObj, double> GetNearestRectangle(Point p)
{
Dictionary <RectangleObj, double> answer = new Dictionary <RectangleObj, double>();
double min_dist = -1.0;
RectangleObj nearest_rect = null;
foreach (RectangleObj rect in storedObjs)
{
double dist = rect.GetDistanceSqToPoint(p);
if (dist <= min_dist || nearest_rect == null)
{
nearest_rect = rect;
min_dist = dist;
if (min_dist < 0.01)
{
answer.Add(nearest_rect, min_dist);
}
}
}
foreach (RectangleObj rect in overflowObjs)
{
double dist = rect.GetDistanceSqToPoint(p);
if (dist <= min_dist || nearest_rect == null)
{
nearest_rect = rect;
min_dist = dist;
if (min_dist < 0.01)
{
answer.Add(nearest_rect, min_dist);
}
}
}
if (nearest_rect != null && answer.Count < 1)
{
answer.Add(nearest_rect, min_dist);
}
return(answer);
}
public void DeleteRectangle(RectangleObj rect, bool overflow_only = false)
{
if (!overflow_only)
{
for (int i = 0; i < storedObjs.Count; i++)
{
if (rect.IsEqual(storedObjs[i]))
{
storedObjs.RemoveAt(i);
return;
}
}
}
for (int i = 0; i < overflowObjs.Count; i++)
{
if (rect.IsEqual(overflowObjs[i]))
{
overflowObjs.RemoveAt(i);
return;
}
}
}
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 NodeType AddRectangle(RectangleObj rect, bool reorganize = true)
{
NodeType deepest_field = FindContainingField(rect, root);
if (deepest_field.IsFull() && !deepest_field.HasAllChildren())
{
PartitionField(deepest_field);
NodeType node = AddRectangle(rect);
if (reorganize)
{
ReorganizeOverflownNodes();
}
if (node != null)
{
return(node);
}
}
else
{
bool overflown = deepest_field.StoreRectangle(rect);
}
return(deepest_field);
}
protected override void OnPaint(PaintEventArgs e)
{
base.OnPaint(e);
if (all_layer_bounds.Count < 1)
{
return;
}
foreach (LayerBounds bound in all_layer_bounds)
{
int colval = ((bound.layerNum) * 220) / num_layers;
int pen_width = Math.Max(1, 5 - bound.layerNum);
Brush br = new SolidBrush(Color.FromArgb(colval, colval, colval));
Pen pen = new Pen(br, pen_width);
PointF p1 = ConvertCoordToScreen(bound.bounds.X, bound.bounds.Y);
PointF p2 = ConvertCoordToScreen(bound.bounds.Width, bound.bounds.Height);
e.Graphics.DrawRectangle(pen, p1.X, p1.Y, p2.X, p2.Y);
}
if (is_draggin && action_status != ActionMode.Move)
{
Brush br = new SolidBrush(Color.Black);
PointF prevPos = ConvertCoordFromScreen(mouse_down_pos.X, mouse_down_pos.Y);
PointF curPos = ConvertCoordFromScreen(current_mouse_pos.X, current_mouse_pos.Y);
Point pPos = new Point((int)prevPos.X, (int)prevPos.Y);
Point cPos = new Point((int)curPos.X, (int)curPos.Y);
RectangleObj newRectangle = new RectangleObj();
newRectangle.SetRectangleByCoords(pPos, cPos);
if (action_status == ActionMode.RangeQuery)
{
int rad = Math.Max(newRectangle.rect_width, newRectangle.rect_height);
newRectangle.UpdateWH(rad, rad);
}
prevPos = ConvertCoordToScreen(newRectangle.min_extent_X, newRectangle.min_extent_Y);
curPos = ConvertCoordToScreen(newRectangle.rect_width, newRectangle.rect_height);
if (action_status == ActionMode.Add || action_status == ActionMode.WindowQuery)
{
e.Graphics.DrawRectangle(new Pen(br), prevPos.X, prevPos.Y, curPos.X, curPos.Y);
}
else if (action_status == ActionMode.RangeQuery)
{
e.Graphics.DrawEllipse(new Pen(br), prevPos.X, prevPos.Y, curPos.X, curPos.Y);
}
}
if (rects_to_draw != null && rects_to_draw.Count > 0)
{
foreach (RectangleObj rect in rects_to_draw)
{
Brush br = new SolidBrush(rect.rect_color);
PointF corner_coord = ConvertCoordToScreen(rect.min_extent_X, rect.min_extent_Y);
PointF wh_extent = ConvertCoordToScreen(rect.rect_width, rect.rect_height);
e.Graphics.FillRectangle(br, corner_coord.X, corner_coord.Y, wh_extent.X, wh_extent.Y);
}
}
if (hollow_rects_to_draw.Count > 0)
{
foreach (RectangleObj rect in hollow_rects_to_draw)
{
Brush br = new SolidBrush(Color.Red);
PointF corner_coord = ConvertCoordToScreen(rect.min_extent_X, rect.min_extent_Y);
PointF wh_extent = ConvertCoordToScreen(rect.rect_width, rect.rect_height);
Pen pen = new Pen(br, 3);
e.Graphics.DrawRectangle(pen, corner_coord.X, corner_coord.Y, wh_extent.X, wh_extent.Y);
pen.Dispose();
}
}
if (incrementalSet)
{
Brush br = new SolidBrush(Color.Orange);
e.Graphics.FillRectangle(br, incrementalPos.X, incrementalPos.Y, 5, 5);
}
if (hollow_circles.Count > 0)
{
foreach (RectangleObj rect in hollow_circles)
{
PointF corner_coord = ConvertCoordToScreen(rect.min_extent_X, rect.min_extent_Y);
PointF wh_extent = ConvertCoordToScreen(rect.rect_width, rect.rect_height);
Brush br = new SolidBrush(rect.rect_color);
Pen pen = new Pen(br, 2);
e.Graphics.DrawEllipse(pen, corner_coord.X, corner_coord.Y, wh_extent.X, wh_extent.Y);
pen.Dispose();
}
}
}
public void SetObj(RectangleObj o)
{
obj = o;
}
private RectangleObj RemoveRectangle(RectangleObj rect, NodeType node)
{
node.RemoveRectangle(rect);
MergeEmptyChildren(node);
return(rect);
}
public bool RemoveRectangle(RectangleObj rect)
{
DeleteRectangle(rect, false);
return(IsOverflown());
}
public void StopMoving()
{
moving_node = default(NodeType);
moving_obj = null;
}
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);
}
public void AddHollowRect(RectangleObj rect)
{
hollow_rects_to_draw.Add(rect);
}
protected virtual void OnRectangleAdded(RectangleObj e)
{
rectAdded?.Invoke(this, e);
}