/// <summary>
/// Fills up the pyramid of tiles above the specified level.
/// </summary>
/// <param name="level">
/// Base level of zoom.
/// </param>
/// <param name="boundary">
/// Bounding coordinates of the region.
/// </param>
public void BuildParentLevels(int level, Boundary boundary)
{
if (boundary == null)
{
throw new ArgumentNullException("boundary");
}
if (this.tileCreator.ProjectionType == ProjectionTypes.Toast)
{
this.toastProjectionCoordinates = ToastHelper.ComputeTileCoordinates(boundary, level);
foreach (int k in Enumerable.Range(1, level).Select(i => level - i))
{
Trace.TraceInformation("{0}: Filling up pyramid at level {1}..", DateTime.Now.TimeOfDay.ToString(@"hh\:mm\:ss", CultureInfo.InvariantCulture), k);
CurrentLevel = k;
Parallel.ForEach(
this.toastProjectionCoordinates[k],
this.ParallelOptions,
tile =>
{
this.tileCreator.CreateParent(k, tile.X, tile.Y);
Interlocked.Increment(ref this.tilesProcessed);
this.ParallelOptions.CancellationToken.ThrowIfCancellationRequested();
});
}
}
else
{
int tileXMin, tileXMax, tileYMin, tileYMax;
foreach (int k in Enumerable.Range(1, level).Select(i => level - i))
{
CurrentLevel = k;
tileXMin = Helper.GetMercatorXTileFromLongitude(boundary.Left, k);
tileXMax = Helper.GetMercatorXTileFromLongitude(boundary.Right, k);
tileYMin = Helper.GetMercatorYTileFromLatitude(boundary.Bottom, k);
tileYMax = Helper.GetMercatorYTileFromLatitude(boundary.Top, k);
BuildParentLevels(k, tileXMin, tileXMax, tileYMin, tileYMax);
}
}
}