public IEnumerable <Task <Drawing> > GetTilesForArea(IProjection projection, Extent mapArea)
{
var fullMapSize = new Rect(projection.FullMapSizeFor(mapArea.ZoomLevel));
var mapRect = projection.ToRect(mapArea);
var listOfTiles = new List <Task <Drawing> >();
for (double x = 0; x < fullMapSize.Width; x += projection.TileSize.Width)
{
for (double y = 0; y < fullMapSize.Height; y += projection.TileSize.Height)
{
var currentTile = new Rect(x, y, projection.TileSize.Width, projection.TileSize.Height);
if (currentTile.IntersectsWith(mapRect))
{
listOfTiles.Add(Task.Run(() => RenderTile(projection, currentTile, mapArea)));
}
}
}
return(listOfTiles);
}
