/// <summary>
/// Extracts a tile of stops.
/// </summary>
public static Stop[] ExtractPointsForStops(this TransitDb transitDb, ulong tileId,
StopLayerConfig config)
{
if (config == null)
{
throw new ArgumentNullException(nameof(config));
}
if (config.Name == null)
{
throw new ArgumentException("Layer configuration has no name set.");
}
if (transitDb.StopsCount == 0)
{
return(new Stop[0]);
}
var tile = new Tile(tileId);
var diffX = (tile.Top - tile.Bottom);
var diffY = (tile.Right - tile.Left);
var marginX = diffX / 1024;
var marginY = diffY / 1024;
var tileBox = new LocalGeo.Box(tile.Bottom - marginY, tile.Left - marginX,
tile.Top + marginY, tile.Right + marginX);
var stopsEnumerator = transitDb.GetStopsEnumerator();
var stopIds = stopsEnumerator.Search(
tileBox.MinLat - diffY, tileBox.MinLon - diffX,
tileBox.MaxLat + diffY, tileBox.MaxLon + diffX);
var stops = new Stop[stopIds.Count];
var i = 0;
foreach (var stopId in stopIds)
{
stopsEnumerator.MoveTo(stopId);
if (config != null && config.IncludeStopsFunc != null &&
!config.IncludeStopsFunc(stopsEnumerator))
{ // explicitly excluded this stop.
continue;
}
stops[i] = new Stop()
{
Latitude = stopsEnumerator.Latitude,
Longitude = stopsEnumerator.Longitude,
MetaId = stopsEnumerator.MetaId
};
i++;
}
return(stops);
}
/// <summary>
/// Extracts a tile of stops.
/// </summary>
public static StopLayer ExtractPointLayerForStops(this TransitDb transitDb, ulong tileId,
StopLayerConfig config)
{
if (config == null)
{
throw new ArgumentNullException(nameof(config));
}
if (config.Name == null)
{
throw new ArgumentException("Layer configuration has no name set.");
}
return(new StopLayer()
{
Meta = transitDb.StopAttributes,
Name = config.Name,
Points = transitDb.ExtractPointsForStops(tileId, config)
});
}
/// <summary>
/// Extracts a tile of stops.
/// </summary>
public static VectorTile ExtractTileForStops(this TransitDb transitDb, ulong tileId,
StopLayerConfig config)
{
if (config == null)
{
throw new ArgumentNullException(nameof(config));
}
if (config.Name == null)
{
throw new ArgumentException("Layer configuration has no name set.");
}
var layers = new List <Layer>(1);
layers.Add(transitDb.ExtractPointLayerForStops(tileId, config));
return(new VectorTile()
{
Layers = layers,
TileId = tileId
});
}
