private void SpreadObjects()
{
if (Matrix != null)
{
return;
}
var width = Tile.Width / 2;
var height = Tile.Height / 2;
Matrix = new Node[2, 2];
for (var x = 0; x < 2; x++)
{
for (var y = 0; y < 2; y++)
{
var geoTile = new GeoTile(new GeoPoint(Tile.Point.Latitude - y * height, Tile.Point.Longitude + x * width), width, height);
Matrix[x, y] = new Node(geoTile);
}
}
foreach (var geoObject in GeoObjects)
{
var x = (Int32)((geoObject.Location.Longitude - Tile.Point.Longitude) / width);
var y = (Int32)((Tile.Point.Latitude - geoObject.Location.Latitude) / height);
Matrix[x, y].AddObject(geoObject);
}
GeoObjects.Clear();
}
internal ITile CreateTile(IEnumerable <IGeometryItem> features, int zoomSquared, int x, int y, double tileTolerance, bool shouldSimplify)
{
var tile = new GeoTile
{
ZoomSquared = zoomSquared,
NumberOfPoints = 0,
NumberOfSimplifiedPoints = 0,
NumberOfFeatures = 0,
X = x,
Y = y,
Features = new List <IGeometryItem>(),
Source = new List <IGeometryItem>()
};
if (features != null)
{
foreach (var feature in features)
{
tile.NumberOfFeatures++;
AddFeature(tile, feature, tileTolerance, shouldSimplify);
var min = feature.MinGeometry;
var max = feature.MaxGeometry;
(double X, double Y)tileMinimum = (X : tile.Min.X, Y : tile.Min.Y);
(double X, double Y)tileMaximum = (X : tile.Max.X, Y : tile.Max.Y);
if (min.X < tile.Min.X || tile.Min.X == 0)
{
tileMinimum.X = min.X;
}
if (min.Y < tile.Min.Y || tile.Min.Y == 0)
{
tileMinimum.Y = min.Y;
}
if (max.X > tile.Max.X || tile.Max.X == 0)
{
tileMaximum.X = max.X;
}
if (max.Y > tile.Max.Y || tile.Max.Y == 0)
{
tileMaximum.Y = max.Y;
}
tile.Min = tileMinimum;
tile.Max = tileMaximum;
}
}
return(tile);
}
public Node(GeoTile tile)
{
GeoObjects = new List <GeoObject>();
Tile = tile;
}