public override async Task RunAsync(IWwtContext context, CancellationToken token)
{
string query = context.Request.Params["Q"];
string[] values = query.Split(',');
int level = Convert.ToInt32(values[0]);
int tileX = Convert.ToInt32(values[1]);
int tileY = Convert.ToInt32(values[2]);
int demSize = 33 * 33;
int parentL = Math.Max(1, level - 3);
int DemGeneration = level - parentL;
int count = (int)Math.Pow(2, 3 - DemGeneration);
int tileSize = (int)Math.Pow(2, DemGeneration);
int offsetX = (tileX % tileSize) * count * 32;
int offsetY = (tileY % tileSize) * count * 32;
var parentX = tileX / tileSize;
var parentY = tileY / tileSize;
using var stream = await _veDownloader.DownloadVeTileAsync(VirtualEarthTile.Ecn, parentL, parentX, parentY, token);
DemTile tile = DemCodec.Decompress(stream);
if (tile != null)
{
float[] DemData = new float[demSize];
int yh = 0;
for (int yl = 0; yl < 33; yl++)
{
int xh = 0;
for (int xl = 0; xl < 33; xl++)
{
int indexI = xl + (32 - yl) * 33;
DemData[indexI] = (float)tile.AltitudeInMeters(yh + offsetY, xh + offsetX);
xh += count;
}
yh += count;
}
var data = new byte[DemData.Length * 4];
using var ms = new MemoryStream(data);
var bw = new BinaryWriter(ms);
foreach (float sample in DemData)
{
bw.Write(sample);
}
bw.Flush();
await context.Response.OutputStream.WriteAsync(data, 0, data.Length, token);
}
context.Response.End();
}
public override void Run(IWwtContext context)
{
string query = context.Request.Params["Q"];
string[] values = query.Split(',');
int level = Convert.ToInt32(values[0]);
int tileX = Convert.ToInt32(values[1]);
int tileY = Convert.ToInt32(values[2]);
int demSize = 33 * 33;
//string wwtDemDir = ConfigurationManager.AppSettings["WWTDEMDir"];
//string filename = String.Format(wwtDemDir + @"\Mercator\Chunks\{0}\{1}.chunk", level, tileY);
string urlBase = "http://ecn.t{0}.tiles.virtualearth.net/tiles/d{1}.elv?g=1&n=z";
string id = WWTUtil.GetTileID(tileX, tileY, level, false);
int server = WWTUtil.GetServerID(tileX, tileY);
WebClient client = new WebClient();
string url = string.Format(urlBase, server, id);
byte[] data = client.DownloadData(url);
MemoryStream stream = new MemoryStream(data);
DemTile tile = DemCodec.Decompress(stream);
if (tile != null)
{
float[] DemData = new float[demSize];
int yh = 0;
for (int yl = 0; yl < 33; yl++)
{
int xh = 0;
for (int xl = 0; xl < 33; xl++)
{
int indexI = xl + (32 - yl) * 33;
DemData[indexI] = (float)tile.AltitudeInMeters(yh, xh);
// Response.Write( tile.AltitudeInMeters(yh, xh).ToString() + "\n");
xh += 8;
//Response.Write(indexI);
}
yh += 8;
}
data = new byte[DemData.Length * 4];
MemoryStream ms = new MemoryStream(data);
BinaryWriter bw = new BinaryWriter(ms);
foreach (float sample in DemData)
{
bw.Write(sample);
}
bw.Flush();
context.Response.BinaryWrite(data);
}
context.Response.End();
}
public override async Task RunAsync(IWwtContext context, CancellationToken token)
{
string query = context.Request.Params["Q"];
string[] values = query.Split(',');
int level = Convert.ToInt32(values[0]);
int tileX = Convert.ToInt32(values[1]);
int tileY = Convert.ToInt32(values[2]);
const int demSize = 33 * 33;
using var stream = await _veDownloader.DownloadVeTileAsync(VirtualEarthTile.Ecn, level, tileX, tileY, token);
DemTile tile = DemCodec.Decompress(stream);
if (tile != null)
{
float[] DemData = new float[demSize];
int yh = 0;
for (int yl = 0; yl < 33; yl++)
{
int xh = 0;
for (int xl = 0; xl < 33; xl++)
{
int indexI = xl + (32 - yl) * 33;
DemData[indexI] = (float)tile.AltitudeInMeters(yh, xh);
xh += 8;
}
yh += 8;
}
var data = new byte[DemData.Length * 4];
using var ms = new MemoryStream(data);
var bw = new BinaryWriter(ms);
foreach (float sample in DemData)
{
bw.Write(sample);
}
bw.Flush();
await context.Response.OutputStream.WriteAsync(data, 0, data.Length, token);
}
context.Response.End();
}
