private AvailableVehicle[] Clusterize(AvailableVehicle[] vehicles)
{
// Divide the map in 25 cells (5*5)
const int numberOfRows = 5;
const int numberOfColumns = 5;
// Maximum number of vehicles in a cell before we start displaying a cluster
const int cellThreshold = 1;
var result = new List <AvailableVehicle>();
var bounds = new Rect();
GetDrawingRect(bounds);
var clusterWidth = (bounds.Right - bounds.Left) / numberOfColumns;
var clusterHeight = (bounds.Bottom - bounds.Top) / numberOfRows;
var list = new List <AvailableVehicle>(vehicles);
for (int rowIndex = 0; rowIndex < numberOfRows; rowIndex++)
{
for (int colIndex = 0; colIndex < numberOfColumns; colIndex++)
{
var top = bounds.Top + rowIndex * clusterHeight;
var left = bounds.Left + colIndex * clusterWidth;
var bottom = bounds.Top + (rowIndex + 1) * clusterHeight;
var right = bounds.Left + (colIndex + 1) * clusterWidth;
var rect = new Rect(left, top, right, bottom);
var vehiclesInRect = list.Where(v => IsVehicleInRect(v, rect)).ToArray();
if (vehiclesInRect.Length > cellThreshold)
{
var clusterBuilder = new VehicleClusterBuilder();
foreach (var v in vehiclesInRect)
{
clusterBuilder.Add(v);
}
result.Add(clusterBuilder.Build());
}
else
{
result.AddRange(vehiclesInRect);
}
foreach (var v in vehiclesInRect)
{
list.Remove(v);
}
}
}
return(result.ToArray());
}
private AvailableVehicle[] Clusterize(AvailableVehicle[] vehicles)
{
// Divide the map in 25 cells (5*5)
const int numberOfRows = 5;
const int numberOfColumns = 5;
// Maximum number of vehicles in a cell before we start displaying a cluster
const int cellThreshold = 1;
var result = new List <AvailableVehicle>();
var bounds = Bounds;
var clusterWidth = bounds.Width / numberOfColumns;
var clusterHeight = bounds.Height / numberOfRows;
var list = new List <AvailableVehicle>(vehicles);
for (var rowIndex = 0; rowIndex < numberOfRows; rowIndex++)
{
for (var colIndex = 0; colIndex < numberOfColumns; colIndex++)
{
var rect = new CGRect(Bounds.X + colIndex * clusterWidth, Bounds.Y + rowIndex * clusterHeight, clusterWidth, clusterHeight);
var vehiclesInRect = list.Where(v => rect.Contains(ConvertCoordinate(new CLLocationCoordinate2D(v.Latitude, v.Longitude), this))).ToArray();
if (vehiclesInRect.Length > cellThreshold)
{
var clusterBuilder = new VehicleClusterBuilder();
foreach (var v in vehiclesInRect)
{
clusterBuilder.Add(v);
}
result.Add(clusterBuilder.Build());
}
else
{
result.AddRange(vehiclesInRect);
}
foreach (var v in vehiclesInRect)
{
list.Remove(v);
}
}
}
return(result.ToArray());
}
