public static void WriteTileTo(this TiledBarrierGraph graph, Stream stream, uint tile)
{
var enumerator = graph.GetEnumerator();
// write vertices.
for (var v = 0; v < graph.VertexCount; v++)
{
if (!enumerator.MoveTo(v))
{
continue;
}
if (!enumerator.MoveNext())
{
continue;
}
// write vertex details.
var vertexGuid = graph.GetVertexGuid(v);
stream.Write(vertexGuid.ToByteArray());
stream.Write(graph.GetVertexLocationBytes(v));
}
stream.Write(EmptyGuid);
// write edges.
for (var v = 0; v < graph.VertexCount; v++)
{
if (!enumerator.MoveTo(v))
{
continue;
}
// check (and count) edges.
var edges = 0;
while (enumerator.MoveNext())
{
if (enumerator.Forward)
{
edges++;
}
}
if (edges == 0)
{
continue;
}
// write vertex1 details.
var vertex1Guid = graph.GetVertexGuid(v);
stream.Write(vertex1Guid.ToByteArray());
// write edges details.
stream.Write(BitConverter.GetBytes(edges)); // the number of edges.
enumerator.MoveTo(v);
while (enumerator.MoveNext())
{
if (!enumerator.Forward)
{
continue;
}
enumerator.WriteToStream(stream);
}
}
stream.Write(EmptyGuid);
// write faces.
for (var f = 1; f < graph.FaceCount; f++)
{
var faceGuid = graph.GetFaceGuid(f);
if (faceGuid == null)
{
continue;
}
stream.Write(faceGuid.Value.ToByteArray());
// write edges.
var edges = graph.EnumerateFaceClockwise(f).ToList();
stream.Write(BitConverter.GetBytes(edges.Count));
foreach (var edge in edges)
{
enumerator.MoveTo(edge.vertex1);
enumerator.MoveNextUntil(edge.edge);
stream.Write(enumerator.GetEdgeGuid().ToByteArray());
stream.WriteByte(edge.forward ? (byte)1 : (byte)0);
}
// write attributes.
stream.WriteAttributes(graph.GetFaceData(f));
}
stream.Write(EmptyGuid);
}
