/// <summary>
/// 从管理器中获取瓦片（不加锁）
/// </summary>
/// <param name="zoom"></param>
/// <param name="p"></param>
/// <returns></returns>
public Tile GetTileNoLock(int zoom, PointInt64 tileIndex)
{
Tile t = null;
Dictionary <PointInt64, Tile> dic1;
if (dicTile.TryGetValue(zoom, out dic1))
{
dic1.TryGetValue(tileIndex, out t);
}
else
{
dic1 = new Dictionary <PointInt64, Tile>();
dicTile.Add(zoom, dic1);
}
//if (t==null)
//{
// //瓦片不存在则添加到加载器中
// t = new Tile(tileIndex, zoom);
// //AddTile(t);
// if (ifNotExitsLoad)
// {
// LoadTile(t);
// }
//}
//t.ReadTime = DateTime.Now;
return(t);
}
protected void GetSecureWords(PointInt64 pos, out string sec1, out string sec2)
{
sec1 = string.Empty; // after &x=...
sec2 = string.Empty; // after &zoom=...
int seclen = (int)((pos.X * 3) + pos.Y) % 8;
sec2 = SecureWord.Substring(0, seclen);
if (pos.Y >= 10000 && pos.Y < 100000)
{
sec1 = Sec1;
}
}
/// <summary>
/// 从管理器中获取瓦片（支持多线程并发获取）
/// </summary>
/// <param name="zoom"></param>
/// <param name="p"></param>
/// <returns></returns>
public Tile GetTile(int zoom, PointInt64 tileIndex)
{
Tile t = null;
TilesFastLock.AcquireReaderLock(_lockTimeOut);
try
{
t = GetTileNoLock(zoom, tileIndex);
}
finally
{
TilesFastLock.ReleaseReaderLock();
}
return(t);
}
/// <summary>
/// 根据层级获取矩形区域内的所有瓦片索引
/// </summary>
public static List <PointInt64> GetAreaTileList(RectLatLng rect, int zoom, int padding = 0)
{
List <PointInt64> ret = new List <PointInt64>();
PointInt64 topLeft = PixelToTileXY(LatLngToPixel(rect.LeftTop, zoom));
PointInt64 rightBottom = PixelToTileXY(LatLngToPixel(rect.RightBottom, zoom));
for (long x = (topLeft.X - padding); x <= (rightBottom.X + padding); x++)
{
for (long y = (topLeft.Y - padding); y <= (rightBottom.Y + padding); y++)
{
PointInt64 p = new PointInt64(x, y);
if (!ret.Contains(p) && p.X >= 0 && p.Y >= 0)
{
ret.Add(p);
}
}
}
return(ret);
}
public static Point ToPoint(this PointInt64 p)
{
return(new Point((int)p.X, (int)p.Y));
}
/// <summary>
/// 根据瓦片索引和瓦片尺寸获取像素坐标
/// </summary>
/// <param name="p"></param>
/// <param name="tileSize"></param>
/// <returns></returns>
public static PointInt64 TileXYToPixel(PointInt64 p, SizeInt tileSize)
{
return(new PointInt64((p.X * tileSize.Width), (p.Y * tileSize.Height)));
}
protected static int GetServerNum(PointInt64 pos, int max)
{
return((int)(pos.X + 2 * pos.Y) % max);
}
/// <summary>
/// 根据瓦片索引和瓦片尺寸获取像素坐标
/// </summary>
/// <param name="p"></param>
/// <param name="tileSize"></param>
/// <returns></returns>
public static PointInt64 TileXYToPixel(PointInt64 p)
{
return(MapHelper.TileXYToPixel(p, TileSize));
}