public HashSet <UnwrappedTileId> GetWithWebMerc(Vector2dBounds bounds, int zoom)
{
_tiles.Clear();
_canonicalTiles.Clear();
if (bounds.IsEmpty())
{
return(_tiles);
}
//stay within WebMerc bounds
Vector2d swWebMerc = new Vector2d(Math.Max(bounds.SouthWest.x, -Utils.Constants.WebMercMax), Math.Max(bounds.SouthWest.y, -Utils.Constants.WebMercMax));
Vector2d neWebMerc = new Vector2d(Math.Min(bounds.NorthEast.x, Utils.Constants.WebMercMax), Math.Min(bounds.NorthEast.y, Utils.Constants.WebMercMax));
UnwrappedTileId swTile = WebMercatorToTileId(swWebMerc, zoom);
UnwrappedTileId neTile = WebMercatorToTileId(neWebMerc, zoom);
for (int x = swTile.X; x <= neTile.X; x++)
{
for (int y = neTile.Y; y <= swTile.Y; y++)
{
UnwrappedTileId uwtid = new UnwrappedTileId(zoom, x, y);
//hack: currently too many tiles are created at lower zoom levels
//investigate formulas, this worked before
if (!_canonicalTiles.Contains(uwtid.Canonical))
{
_tiles.Add(uwtid);
_canonicalTiles.Add(uwtid.Canonical);
}
}
}
return(_tiles);
}
/// <summary> Get a tile cover for the specified bounds and zoom. </summary>
/// <param name="bounds"> Geographic bounding box.</param>
/// <param name="zoom"> Zoom level. </param>
/// <returns> The tile cover set. </returns>
/// <example>
/// Build a map of Colorado using TileCover:
/// <code>
/// var sw = new Vector2d(36.997749, -109.0524961);
/// var ne = new Vector2d(41.0002612, -102.0609668);
/// var coloradoBounds = new Vector2dBounds(sw, ne);
/// var tileCover = TileCover.Get(coloradoBounds, 8);
/// Console.Write("Tiles Needed: " + tileCover.Count);
/// foreach (var id in tileCover)
/// {
/// var tile = new RasterTile();
/// var parameters = new Tile.Parameters();
/// parameters.Id = id;
/// parameters.Fs = MapboxAccess.Instance;
/// parameters.MapId = "mapbox://styles/mapbox/outdoors-v10";
/// tile.Initialize(parameters, (Action)(() =>
/// {
/// // Place tiles and load textures.
/// }));
/// }
/// </code>
/// </example>
public static HashSet <CanonicalTileId> Get(Vector2dBounds bounds, int zoom)
{
var tiles = new HashSet <CanonicalTileId>();
if (bounds.IsEmpty() ||
bounds.South > Constants.LatitudeMax ||
bounds.North < -Constants.LatitudeMax)
{
return(tiles);
}
var hull = Vector2dBounds.FromCoordinates(
new Vector2d(Math.Max(bounds.South, -Constants.LatitudeMax), bounds.West),
new Vector2d(Math.Min(bounds.North, Constants.LatitudeMax), bounds.East));
var sw = CoordinateToTileId(hull.SouthWest, zoom);
var ne = CoordinateToTileId(hull.NorthEast, zoom);
// Scanlines.
for (var x = sw.X; x <= ne.X; ++x)
{
for (var y = ne.Y; y <= sw.Y; ++y)
{
tiles.Add(new UnwrappedTileId(zoom, x, y).Canonical);
}
}
return(tiles);
}
public void IsEmpty()
{
var bounds1 = new Vector2dBounds(new Vector2d(10, 10), new Vector2d(0, 0));
Assert.IsTrue(bounds1.IsEmpty());
var bounds2 = new Vector2dBounds(new Vector2d(0, 0), new Vector2d(0, 0));
Assert.IsFalse(bounds2.IsEmpty());
var bounds3 = new Vector2dBounds(new Vector2d(0, 0), new Vector2d(10, 10));
Assert.IsFalse(bounds3.IsEmpty());
}
public static HashSet <UnwrappedTileId> GetWithWebMerc(Vector2dBounds bounds, int zoom)
{
HashSet <UnwrappedTileId> tiles = new HashSet <UnwrappedTileId>();
HashSet <CanonicalTileId> canonicalTiles = new HashSet <CanonicalTileId>();
if (bounds.IsEmpty())
{
return(tiles);
}
//stay within WebMerc bounds
Vector2d swWebMerc = new Vector2d(Math.Max(bounds.SouthWest.x, -Constants.WebMercMax), Math.Max(bounds.SouthWest.y, -Constants.WebMercMax));
Vector2d neWebMerc = new Vector2d(Math.Min(bounds.NorthEast.x, Constants.WebMercMax), Math.Min(bounds.NorthEast.y, Constants.WebMercMax));
//UnityEngine.Debug.LogFormat("swWebMerc:{0}/{1} neWebMerc:{2}/{3}", swWebMerc.x, swWebMerc.y, neWebMerc.x, neWebMerc.y);
UnwrappedTileId swTile = WebMercatorToTileId(swWebMerc, zoom);
UnwrappedTileId neTile = WebMercatorToTileId(neWebMerc, zoom);
//UnityEngine.Debug.LogFormat("swTile:{0} neTile:{1}", swTile, neTile);
for (int x = swTile.X; x <= neTile.X; x++)
{
for (int y = neTile.Y; y <= swTile.Y; y++)
{
UnwrappedTileId uwtid = new UnwrappedTileId(zoom, x, y);
//hack: currently too many tiles are created at lower zoom levels
//investigate formulas, this worked before
if (!canonicalTiles.Contains(uwtid.Canonical))
{
//Debug.LogFormat("TileCover.GetWithWebMerc: {0}/{1}/{2}", zoom, x, y);
tiles.Add(uwtid);
canonicalTiles.Add(uwtid.Canonical);
}
}
}
return(tiles);
}
