private async void btnTestFakeTerrain_Click_1(object sender, EventArgs e)
{
listBox1.Items.Add("Fetching DEM...");
// class to get digital elevation models(DEM)
FakeDEMSource demSrc = new FakeDEMSource();
demSrc.Initalize(new MapHeader()
{
GridSize = Int32.Parse(txtTileSize.Text)
});
var elevData = await demSrc.GetDemLL(1, 1, 1, 1); //) mp.GetTerrainTileAsync(x,y,z);
listBox1.Items.Add($"DEM length {elevData.Elev.Length}");
listBox1.Items.Add("Making Mesh...");
// This class constructs a cesium quantized mesh from the dem
var vertices = new Mesh().MakeFakeMesh(ref elevData);
listBox1.Items.Add("Making Tile...");
// This class constructs a quantized mesh tile mesh from the original mesh
var tile = new Tiler().MakeTile(vertices,
new TerrainTileHeader()
{
MinimumHeight = elevData.MinimumHeight, MaximumHeight = elevData.MaximumHeight
},
MapUtil.GridSizeToTriangleCount(elevData.GridSize), elevData.GridSize);
listBox1.Items.Add($"Tile Ready. Size:{tile.Length} . Saving to {txtPath.Text}");
var ms = new MemoryStream(tile);
using (FileStream fs = new FileStream(txtPath.Text, FileMode.Create))
using (GZipStream zipStream = new GZipStream(fs, CompressionMode.Compress, false))
{
zipStream.Write(ms.ToArray(), 0, ms.ToArray().Length); // .Write(bytes, 0, bytes.Length);
}
}
public async Task <IActionResult> GetFakeTile(int x, int y, int z, string formatExtension)
{
// todo for now default values. these will be passed in eventually
var testDataPath = _configuration["TestDataPath"];
Guid projectId;
bool isValid = Guid.TryParse(_configuration["DefaultProjectUid"], out projectId);
if (!isValid)
{
return(NotFound()); // todo
}
if (z < 1)
{
// these two tiles are standard
// Use tiler to fetch the correct tile
var basicTile = await new Tiler.Tiler().FetchTile(testDataPath, x, y, z);
if (basicTile != null)
{
HttpContext.Response.Headers.Add("Content-Encoding", "gzip"); // already compressed on disk
// HttpContext.Response.Headers.Add("Access-Control-Allow-Origin","*"); // already compressed on disk
HttpContext.Response.Headers.Add("Content-Length", basicTile.Length.ToString());
HttpContext.Response.Headers.Add("Content-Type", "application/octet-stream");
HttpContext.Response.Headers.Add("Content-Disposition", $"attachment;filename={y}.terrain");
Console.WriteLine($"*** Tile x:{x},y:{y},z:{z} was found ***");
return(File(basicTile, _TerrainDataQM));
}
return(NotFound());
}
FakeDEMSource demSrc = new FakeDEMSource();
demSrc.Initalize(new MapHeader()
{
GridSize = _GridSize
});
// todo x,y,z to lat lon
var elevData = await demSrc.GetDemLL(1, 1, 1, 1); // just the same tile always for now
// This class constructs a cesium quantized mesh from the dem
var vertices = new Mesh.Mesh().MakeFakeMesh(ref elevData);
// todo fill in header details
var tempHeadr = new TerrainTileHeader()
{
MaximumHeight = elevData.MaximumHeight,
MinimumHeight = elevData.MinimumHeight
};
// This class constructs a quantized mesh tile mesh from the original mesh
var tile = new Tiler.Tiler().MakeTile(vertices, tempHeadr, MapUtil.GridSizeToTriangleCount(elevData.GridSize),
elevData.GridSize);
if (tile != null)
{
var compressed = MapUtil.Compress(tile);
HttpContext.Response.Headers.Add("Content-Encoding", "gzip"); // already compressed on disk
// HttpContext.Response.Headers.Add("Access-Control-Allow-Origin","*"); // already compressed on disk
HttpContext.Response.Headers.Add("Content-Length", compressed.Length.ToString());
HttpContext.Response.Headers.Add("Content-Type", "application/octet-stream");
HttpContext.Response.Headers.Add("Content-Disposition", $"attachment;filename={y}.terrain");
return(File(compressed, _TerrainDataQM));
}
else
{
return(NotFound());
}
}
