/// <summary>
/// Computes the list of all possible tiles to request
/// </summary>
/// <returns></returns>
public TileRef[] GetTileList()
{
var ranges = new TileSetRange[_maxZoomLevel + 1];
for (int z = 0; z < ranges.Length; z++)
{
//Allow floating point drift
var ll = WorldToTilePos(_ll.X, _ll.Y, z);
var ur = WorldToTilePos(_ur.X, _ur.Y, z);
if (_specificZoomLevels.Count == 0 || _specificZoomLevels.Contains(z))
{
var rows = Math.Abs(ur.X - ll.X) + 1;
var cols = Math.Abs(ur.Y - ll.Y) + 1;
ranges[z] = new TileSetRange(Math.Min(ll.X, ur.X), Math.Min(ll.Y, ur.Y), z, rows, cols);
}
else //This zoom level has been omitted
{
ranges[z] = new TileSetRange(z);
}
}
var capacity = ranges.Sum(g => g.Total);
var tiles = new TileRef[capacity];
var current = 0;
for (int z = 0; z < ranges.Length; z++)
{
var g = ranges[z];
for (int xi = 0; xi < g.Rows; xi++)
{
for (int yi = 0; yi < g.Cols; yi++)
{
int x = g.X + xi;
int y = g.Y + yi;
tiles[current] = new TileRef(string.Empty, x, y, z);
current++;
}
}
}
return(tiles);
}
/// <summary>
/// Computes the list of all possible tiles to request
/// </summary>
/// <returns></returns>
public TileRef[] GetTileList()
{
//Z goes from 0 to 19
var ranges = new TileSetRange[20];
for (int z = 0; z < ranges.Length; z++)
{
//Allow floating point drift
var ll = WorldToTilePos(_ll.X, _ll.Y, z);
var ur = WorldToTilePos(_ur.X, _ur.Y, z);
var rows = Math.Abs(ur.X - ll.X) + 1;
var cols = Math.Abs(ur.Y - ll.Y) + 1;
ranges[z] = new TileSetRange(Math.Min(ll.X, ur.X), Math.Min(ll.Y, ur.Y), z, rows, cols);
}
var capacity = ranges.Sum(g => g.Total);
var tiles = new TileRef[capacity];
var current = 0;
for (int z = 0; z < ranges.Length; z++)
{
var g = ranges[z];
for (int xi = 0; xi < g.Rows; xi++)
{
for (int yi = 0; yi < g.Cols; yi++)
{
int x = g.X + xi;
int y = g.Y + yi;
tiles[current] = new TileRef(string.Empty, x, y, z);
current++;
}
}
}
return(tiles);
}