public IActionResult GetMvt(int z, uint x, uint y)
{
if (z != 14)
{
return(NotFound());
}
var tile = TileStatic.ToLocalId(x, y, z);
try
{
var box = TileStatic.Box(z, tile);
var landusePolygons = LandusePolygons.GetLandusePolygons(box, z, Startup.TileSource.GetTile, t =>
{
if (DefaultMergeFactorCalculator.Landuses.TryCalculateValue(t, out var type))
{
return(type);
}
return(null);
}).Select(p => new Feature(p.polygon, new AttributesTable {
{ "type", p.landuseType }
}));
var layer = new Layer {
Name = "landuse"
};
foreach (var loc in landusePolygons)
{
layer.Features.Add(loc);
}
var vectorTile = new VectorTile
{
TileId = new NetTopologySuite.IO.VectorTiles.Tiles.Tile((int)x, (int)y, z).Id
};
vectorTile.Layers.Add(layer);
var memoryStream = new MemoryStream();
vectorTile.Write(memoryStream);
memoryStream.Seek(0, SeekOrigin.Begin);
return(new FileStreamResult(memoryStream, "application/x-protobuf"));
}
catch (Exception e)
{
Console.WriteLine(e);
throw;
}
}
public IEnumerable <Feature> Get(int z, uint x, uint y)
{
var tile = TileStatic.ToLocalId(x, y, z);
var box = TileStatic.Box(z, tile);
var landusePolygons = LandusePolygons.GetLandusePolygons(box, z, Startup.TileSource.GetTile, t =>
{
if (DefaultMergeFactorCalculator.Landuses.TryCalculateValue(t, out var type))
{
return(type);
}
return(null);
}).Select(p => new Feature(p.polygon, new AttributesTable {
{ "type", p.landuseType }
}));
return(landusePolygons);
}
public static (bool success, IEnumerable <uint> missingTiles) AssignFaces(this TiledBarrierGraph graph,
uint tile)
{
if (!graph.HasTile(tile))
{
return(false, new[] { tile });
}
var tileBox = TileStatic.Box(graph.Zoom, tile);
var tilesMissing = new HashSet <uint>();
graph.ResetFaces();
// the default face for the case where a loop cannot be found.
var unAssignableFace = graph.AddFace();
// check each edges for faces and if missing assign them.
var enumerator = graph.GetEnumerator();
for (var v = 0; v < graph.VertexCount; v++)
{
if (!enumerator.MoveTo(v))
{
continue;
}
if (!enumerator.MoveNext())
{
continue;
}
var vBox = graph.GetVertexBox(v);
if (vBox == null || !vBox.Value.Overlaps(tileBox))
{
continue;
}
// var vTile = TileStatic.WorldTileLocalId(vLocation.longitude, vLocation.latitude, graph.Zoom);
// if (vTile != tile) continue;
enumerator.MoveTo(v);
while (enumerator.MoveNext())
{
if (enumerator.Forward && enumerator.FaceRight != int.MaxValue)
{
continue;
}
if (!enumerator.Forward && enumerator.FaceLeft != int.MaxValue)
{
continue;
}
// check if the edge bbox overlaps the tiles.
var eBox = enumerator.Box;
if (!eBox.Overlaps(tileBox))
{
continue;
}
// ok this edge has an undetermined face.
var result = enumerator.AssignFace(unAssignableFace);
if (!result.success)
{
tilesMissing.UnionWith(result.missingTiles);
}
}
}
if (tilesMissing.Count > 0)
{
return(false, tilesMissing);
}
return(true, Enumerable.Empty <uint>());
}
