public bool Contains(IEnvelop b)
{
return(MinPointLongitude <= b.MinPointLongitude &&
MinPointLatitude <= b.MinPointLatitude &&
b.MaxPointLongitude <= MaxPointLongitude &&
b.MaxPointLatitude <= MaxPointLatitude);
}
public bool Intersects(IEnvelop b)
{
return(b.MinPointLongitude <= MaxPointLongitude &&
b.MinPointLatitude <= MaxPointLatitude &&
b.MaxPointLongitude >= MinPointLongitude &&
b.MaxPointLatitude >= MinPointLatitude);
}
public SpatialIndexNode(uint data, IEnvelop envelope, SpatialIndexNode[] children)
{
Data = data;
Envelope = envelope;
Children = children;
IsLeaf = false;
}
private static void AdjutsParentBounds(IEnvelop bbox, List <RTreeNode> path, int level)
{
// adjust bboxes along the given tree path
for (var i = level; i >= 0; i--)
{
path[i].Envelope.Extend(bbox);
}
}
public void Extend(IEnvelop by)
{
MinPointLatitude = Math.Min(MinPointLatitude, by.MinPointLatitude);
MinPointLongitude = Math.Min(MinPointLongitude, by.MinPointLongitude);
MaxPointLatitude = Math.Max(MaxPointLatitude, by.MaxPointLatitude);
MaxPointLongitude = Math.Max(MaxPointLongitude, by.MaxPointLongitude);
}
private static double CombinedArea(IEnvelop what, IEnvelop with)
{
var minX1 = Math.Max(what.MinPointLongitude, with.MinPointLongitude);
var minY1 = Math.Max(what.MinPointLatitude, with.MinPointLatitude);
var maxX2 = Math.Min(what.MaxPointLongitude, with.MaxPointLongitude);
var maxY2 = Math.Min(what.MaxPointLatitude, with.MaxPointLatitude);
return((maxX2 - minX1) * (maxY2 - minY1));
}
private static double IntersectionArea(IEnvelop what, IEnvelop with)
{
var minX = Math.Max(what.MinPointLongitude, with.MinPointLongitude);
var minY = Math.Max(what.MinPointLatitude, with.MinPointLatitude);
var maxX = Math.Min(what.MaxPointLongitude, with.MaxPointLongitude);
var maxY = Math.Min(what.MaxPointLatitude, with.MaxPointLatitude);
return(Math.Max(0, maxX - minX) * Math.Max(0, maxY - minY));
}
public LocksController(
IEnvelop envelop,
ICommand<LockInfo> putLockCmd,
ICommand<LockInfo> removeLockCmd)
: base(envelop)
{
_putLockCmd = putLockCmd;
_removeLockCmd = removeLockCmd;
}
private RTreeNode ChooseSubtree(IEnvelop bbox, RTreeNode node, int level, List <RTreeNode> path)
{
while (true)
{
path.Add(node);
if (node.IsLeaf || path.Count - 1 == level)
{
break;
}
var minArea = double.MaxValue;
var minEnlargement = double.MaxValue;
RTreeNode targetNode = null;
if (node.HasChildren)
{
for (var i = 0; i < node.Children.Count; i++)
{
var child = node.Children[i];
var area = child.Envelope.Area;
var enlargement = CombinedArea(bbox, child.Envelope) - area;
// choose entry with the least area enlargement
if (enlargement < minEnlargement)
{
minEnlargement = enlargement;
minArea = area < minArea ? area : minArea;
targetNode = child;
}
else if (Math.Abs(enlargement - minEnlargement) < double.Epsilon)
{
// otherwise choose one with the smallest area
if (area < minArea)
{
minArea = area;
targetNode = child;
}
}
}
}
Debug.Assert(targetNode != null);
node = targetNode;
}
return(node);
}
public DocumentsController(
IEnvelop envelop,
IQuery<EmptyRequest, IEnumerable<DocumentDetails>> getAllDocuments,
IQuery<Guid, DocumentDetails> getDocument,
ICommand<Document> submitDocumentCmd,
ICommand<Document> updateDocumentCmd,
ICommand<DocumentReference> deleteDocument)
: base(envelop)
{
_getAllDocuments = getAllDocuments;
_getDocument = getDocument;
_submitDocumentCmd = submitDocumentCmd;
_updateDocumentCmd = updateDocumentCmd;
_deleteDocument = deleteDocument;
}
private IObservable <T> Search(IEnvelop envelope, int zoomLevel)
{
var minMargin = ZoomHelper.GetMinMargin(zoomLevel);
return(Observable.Create <T>(observer =>
{
var node = Root;
if (!envelope.Intersects(node.Envelope))
{
observer.OnCompleted();
return Disposable.Empty;
}
var nodesToSearch = new Stack <RTreeNode>();
while (node != null && node.Envelope != null)
{
if (node.Children != null)
{
foreach (var child in node.Children)
{
var childEnvelope = child.Envelope;
if (envelope.Intersects(childEnvelope))
{
if (node.IsLeaf && childEnvelope.Margin >= minMargin)
{
observer.OnNext(child.Data);
}
else if (envelope.Contains(childEnvelope))
{
Collect(child, minMargin, observer);
}
else
{
nodesToSearch.Push(child);
}
}
}
}
node = nodesToSearch.TryPop();
}
observer.OnCompleted();
return Disposable.Empty;
}));
}
private static bool ReadNode(BinaryReader reader, out SpatialIndexNode root)
{
var data = reader.ReadUInt32();
if (data == Marker)
{
root = default(SpatialIndexNode);
return(true);
}
var packedValues = reader.ReadByte();
bool isPointEnvelop = (packedValues & 1) > 0;
bool isLeaf = (packedValues >> 1) > 0;
IEnvelop envelop = isPointEnvelop ?
(IEnvelop) new PointEnvelop(reader.ReadInt32(), reader.ReadInt32()) :
new Envelop(reader.ReadInt32(), reader.ReadInt32(), reader.ReadInt32(), reader.ReadInt32());
List <SpatialIndexNode> children = null;
while (true)
{
SpatialIndexNode child;
if (ReadNode(reader, out child))
{
break;
}
if (children == null)
{
children = new List <SpatialIndexNode>(64);
}
children.Add(child);
}
root = new SpatialIndexNode(data, envelop, children != null && children.Count > 0 ? children.ToArray() : null);
root.IsLeaf = isLeaf;
return(false);
}
public TicketsController(
IEnvelop envelop,
IQuery<EmptyRequest, IEnumerable<TicketDetails>> allTicketsQuery,
IQuery<Guid, TicketDetails> getTicketQuery,
IQuery<HttpRequestMessage, ulong> versionQuery,
ICommand<Ticket> addTicketCmd,
ICommand<Ticket> updateTicketCmd,
ICommand<TicketReference> deleteTicketCmd)
: base(envelop)
{
_getTicketQuery = getTicketQuery;
_allTicketsQuery = allTicketsQuery;
_addTicketCmd = addTicketCmd;
_updateTicketCmd = updateTicketCmd;
_deleteTicketCmd = deleteTicketCmd;
_versionQuery = versionQuery;
}
public RTreeNode(T data, IEnvelop envelope)
{
Data = data;
Envelope = envelope;
}
public void Extend(IEnvelop @by)
{
throw new NotImplementedException();
}
public bool Intersects(IEnvelop b)
{
throw new NotImplementedException();
}
public bool Contains(IEnvelop b)
{
throw new NotImplementedException();
}
internal void Insert(T data, IEnvelop bounds)
{
Insert(new RTreeNode(data, bounds));
}
