/// <summary>
/// Initializes the active tile plane by requesting images centered at the specified geo-coordinate.
/// </summary>
/// <param name="centerCoordinate">The geo-coordinate which will serve as the center of the
/// middle tile.</param>
private void GetActivePlaneImages(GeoCoordinate centerCoordinate)
{
Vector2 centerPixelXY = TileSystem.LatLongToPixelXY(centerCoordinate, zoomLevel);
int planeCenterIndex = PlaneCenterIndex;
for (int xIndex = 0; xIndex < ActiveTilePlaneSize; xIndex++)
{
int xDelta = xIndex - planeCenterIndex;
for (int yIndex = 0; yIndex < ActiveTilePlaneSize; yIndex++)
{
int yDelta = yIndex - planeCenterIndex;
TileInformation cellInformation = activeTilePlane[xIndex, yIndex];
// Initialize or clean the active tile cube cell
if (cellInformation == null)
{
cellInformation = new TileInformation(TileServerRequestCompleted);
activeTilePlane[xIndex, yIndex] = cellInformation;
}
else
{
cellInformation.Dispose();
}
// Calculate the center geo-coordinate for the current tile
Vector2 tileCenterPixelXY = centerPixelXY + tileDimensions * new Vector2(xDelta, yDelta);
GeoCoordinate tileCenterGeoCoordinate;
try
{
tileCenterGeoCoordinate = TileSystem.PixelXYToLatLong(tileCenterPixelXY, zoomLevel);
GetImageFromServer(cellInformation, tileCenterGeoCoordinate, zoomLevel, ViewType);
}
catch (ArgumentOutOfRangeException)
{
cellInformation.Image = unavailableImage;
}
}
}
}