public bool RemoveAnnotation(IMKAnnotation annotation, FBQuadTreeNode fromNode)
{
if (!FBUtils.FBBoundingBoxContainsCoordinate(fromNode.BoundingBox, annotation.Coordinate))
{
return(false);
}
if (fromNode.Annotations.Contains(annotation))
{
fromNode.Annotations.Remove(annotation);
fromNode.Count--;
return(true);
}
if (RemoveAnnotation(annotation, fromNode.NorthEast))
{
return(true);
}
if (RemoveAnnotation(annotation, fromNode.NorthWest))
{
return(true);
}
if (RemoveAnnotation(annotation, fromNode.SouthEast))
{
return(true);
}
if (RemoveAnnotation(annotation, fromNode.SouthWest))
{
return(true);
}
return(false);
}
public void EnumerateAnnotationsInBox(FBBoundingBox box, FBQuadTreeNode withNode, AnnotationEnumDelegate enumFunc)
{
if (!FBUtils.FBBoundingBoxIntersectsBoundingBox(withNode.BoundingBox, box))
{
return;
}
List <IMKAnnotation> tempArray = new List <IMKAnnotation>(withNode.Annotations);
foreach (IMKAnnotation annotation in tempArray)
{
if (FBUtils.FBBoundingBoxContainsCoordinate(box, annotation.Coordinate))
{
enumFunc(annotation);
}
}
if (withNode.IsLeaf())
{
return;
}
EnumerateAnnotationsInBox(box, withNode.NorthEast, enumFunc);
EnumerateAnnotationsInBox(box, withNode.NorthWest, enumFunc);
EnumerateAnnotationsInBox(box, withNode.SouthEast, enumFunc);
EnumerateAnnotationsInBox(box, withNode.SouthWest, enumFunc);
}
private void Init()
{
Count = 0;
NorthEast = null;
NorthWest = null;
SouthEast = null;
SouthWest = null;
Annotations = new List <IMKAnnotation>(FBConsts.kNodeCapacity);
}
private void Init()
{
Count = 0;
NorthEast = null;
NorthWest = null;
SouthEast = null;
SouthWest = null;
Annotations = new List<IMKAnnotation>(FBConsts.kNodeCapacity);
}
public void Subdivide()
{
NorthEast = new FBQuadTreeNode();
NorthWest = new FBQuadTreeNode();
SouthEast = new FBQuadTreeNode();
SouthWest = new FBQuadTreeNode();
FBBoundingBox box = BoundingBox;
double xMid = (box.xf + box.x0) / 2.0;
double yMid = (box.yf + box.y0) / 2.0;
NorthEast.BoundingBox = FBUtils.FBBoundingBoxMake(xMid, box.y0, box.xf, yMid);
NorthWest.BoundingBox = FBUtils.FBBoundingBoxMake(box.x0, box.y0, xMid, yMid);
SouthEast.BoundingBox = FBUtils.FBBoundingBoxMake(xMid, yMid, box.xf, box.yf);
SouthWest.BoundingBox = FBUtils.FBBoundingBoxMake(box.x0, yMid, xMid, box.yf);
}
public void Subdivide()
{
NorthEast = new FBQuadTreeNode();
NorthWest = new FBQuadTreeNode();
SouthEast = new FBQuadTreeNode();
SouthWest = new FBQuadTreeNode();
FBBoundingBox box = BoundingBox;
double xMid = (box.xf + box.x0) / 2.0;
double yMid = (box.yf + box.y0) / 2.0;
NorthEast.BoundingBox = FBUtils.FBBoundingBoxMake(xMid, box.y0, box.xf, yMid);
NorthWest.BoundingBox = FBUtils.FBBoundingBoxMake(box.x0, box.y0, xMid, yMid);
SouthEast.BoundingBox = FBUtils.FBBoundingBoxMake(xMid, yMid, box.xf, box.yf);
SouthWest.BoundingBox = FBUtils.FBBoundingBoxMake(box.x0, yMid, xMid, box.yf);
}
public bool RemoveAnnotation(IMKAnnotation annotation, FBQuadTreeNode fromNode)
{
if (!FBUtils.FBBoundingBoxContainsCoordinate(fromNode.BoundingBox, annotation.Coordinate)) {
return false;
}
if (fromNode.Annotations.Contains(annotation))
{
fromNode.Annotations.Remove(annotation);
fromNode.Count--;
return true;
}
if (RemoveAnnotation(annotation, fromNode.NorthEast)) return true;
if (RemoveAnnotation(annotation, fromNode.NorthWest)) return true;
if (RemoveAnnotation(annotation, fromNode.SouthEast)) return true;
if (RemoveAnnotation(annotation, fromNode.SouthWest)) return true;
return false;
}
public bool InsertAnnotation(IMKAnnotation annotation, FBQuadTreeNode toNode)
{
if (!FBUtils.FBBoundingBoxContainsCoordinate(toNode.BoundingBox, annotation.Coordinate))
{
return(false);
}
if (toNode.Count < FBConsts.kNodeCapacity)
{
toNode.Annotations.Add(annotation);
toNode.Count++;
return(true);
}
if (toNode.IsLeaf())
{
toNode.Subdivide();
}
if (InsertAnnotation(annotation, toNode.NorthEast))
{
return(true);
}
if (InsertAnnotation(annotation, toNode.NorthWest))
{
return(true);
}
if (InsertAnnotation(annotation, toNode.SouthEast))
{
return(true);
}
if (InsertAnnotation(annotation, toNode.SouthWest))
{
return(true);
}
return(false);
}
public bool InsertAnnotation(IMKAnnotation annotation, FBQuadTreeNode toNode)
{
if (!FBUtils.FBBoundingBoxContainsCoordinate(toNode.BoundingBox, annotation.Coordinate)) {
return false;
}
if (toNode.Count < FBConsts.kNodeCapacity) {
toNode.Annotations.Add(annotation);
toNode.Count++;
return true;
}
if (toNode.IsLeaf()) {
toNode.Subdivide();
}
if (InsertAnnotation(annotation, toNode.NorthEast)) return true;
if (InsertAnnotation(annotation, toNode.NorthWest)) return true;
if (InsertAnnotation(annotation, toNode.SouthEast)) return true;
if (InsertAnnotation(annotation, toNode.SouthWest)) return true;
return false;
}
public void EnumerateAnnotationsInBox(FBBoundingBox box, FBQuadTreeNode withNode, AnnotationEnumDelegate enumFunc)
{
if (!FBUtils.FBBoundingBoxIntersectsBoundingBox(withNode.BoundingBox, box)) {
return;
}
List<IMKAnnotation> tempArray = new List<IMKAnnotation>(withNode.Annotations);
foreach (IMKAnnotation annotation in tempArray) {
if (FBUtils.FBBoundingBoxContainsCoordinate(box, annotation.Coordinate)) {
enumFunc(annotation);
}
}
if (withNode.IsLeaf()) {
return;
}
EnumerateAnnotationsInBox(box, withNode.NorthEast, enumFunc);
EnumerateAnnotationsInBox(box, withNode.NorthWest, enumFunc);
EnumerateAnnotationsInBox(box, withNode.SouthEast, enumFunc);
EnumerateAnnotationsInBox(box, withNode.SouthWest, enumFunc);
}
public FBQuadTree()
{
_rootNode = new FBQuadTreeNode(FBUtils.FBBoundingBoxForMapRect(new MKMapRect().World));
}
public FBQuadTree()
{
_rootNode = new FBQuadTreeNode(FBUtils.FBBoundingBoxForMapRect(new MKMapRect().World));
}