/// <summary>
/// Deserializes from a stream.
/// </summary>
public static RoutingNetwork Deserialize(Stream stream, RoutingNetworkProfile profile)
{
var version = stream.ReadByte();
if (version > 2)
{
throw new Exception(string.Format("Cannot deserialize routing network: Invalid version #: {0}, upgrade Itinero.", version));
}
var position = stream.Position;
var initialPosition = stream.Position;
// read maxEdgeDistance if version # = 2.
var maxEdgeDistance = Constants.DefaultMaxEdgeDistance;
if (version == 2)
{
var bytes = new byte[4];
stream.Read(bytes, 0, 4);
maxEdgeDistance = BitConverter.ToSingle(bytes, 0);
}
// deserialize graph.
var graph = GeometricGraph.Deserialize(stream, profile == null ? null : profile.GeometricGraphProfile);
var size = stream.Position - position;
var edgeLength = graph.EdgeCount;
var edgeSize = 1;
ArrayBase <uint> edgeData;
if (profile == null)
{ // just create arrays and read the data.
edgeData = Context.ArrayFactory.CreateMemoryBackedArray <uint>(edgeLength * edgeSize);
edgeData.CopyFrom(stream);
size += edgeLength * edgeSize * 4;
}
else
{ // create accessors over the exact part of the stream that represents vertices/edges.
position = stream.Position;
var map = new MemoryMapStream(new CappedStream(stream, position,
edgeLength * edgeSize * 4));
edgeData = new Array <uint>(map.CreateUInt32(edgeLength * edgeSize), profile.EdgeDataProfile);
size += edgeLength * edgeSize * 4;
}
// make stream is positioned correctly.
stream.Seek(initialPosition + size, System.IO.SeekOrigin.Begin);
return(new RoutingNetwork(graph, edgeData, maxEdgeDistance));
}
/// <summary>
/// Creates a new routing network.
/// </summary>
public RoutingNetwork(MemoryMap map, RoutingNetworkProfile profile,
float maxEdgeDistance = Constants.DefaultMaxEdgeDistance)
{
_maxEdgeDistance = maxEdgeDistance;
if (profile == null)
{
_graph = new GeometricGraph(map, 1);
_edgeData = new Array <uint>(map, _edgeDataSize * _graph.EdgeCount);
}
else
{
_graph = new GeometricGraph(map, profile.GeometricGraphProfile, 1);
_edgeData = new Array <uint>(map, _edgeDataSize * _graph.EdgeCount, profile.EdgeDataProfile);
}
}