public void TestUncontractedWitnessed()
{
// build graph.
var graph = new DirectedMetaGraph(ContractedEdgeDataSerializer.Size,
ContractedEdgeDataSerializer.MetaSize);
graph.AddEdge(0, 1, 100, null, Constants.NO_VERTEX);
graph.AddEdge(1, 0, 100, null, Constants.NO_VERTEX);
graph.AddEdge(1, 2, 100, null, Constants.NO_VERTEX);
graph.AddEdge(2, 1, 100, null, Constants.NO_VERTEX);
graph.AddEdge(1, 3, 10, null, Constants.NO_VERTEX);
graph.AddEdge(3, 1, 10, null, Constants.NO_VERTEX);
graph.AddEdge(3, 2, 10, null, Constants.NO_VERTEX);
graph.AddEdge(2, 3, 10, null, Constants.NO_VERTEX);
graph.Compress();
// contract graph.
var priorities = new Dictionary <uint, float>();
priorities.Add(1, 0);
priorities.Add(0, 1);
priorities.Add(2, 2);
priorities.Add(3, 3);
var hierarchyBuilder = new HierarchyBuilder(graph,
new MockPriorityCalculator(priorities),
new DykstraWitnessCalculator(int.MaxValue));
hierarchyBuilder.Run();
// edges 1->2 and 2->1 should have been removed.
var edge = graph.GetEdgeEnumerator(0).FirstOrDefault(x => x.Neighbour == 3);
Assert.IsNotNull(edge);
var edgeData = ContractedEdgeDataSerializer.Deserialize(edge.Data[0], edge.MetaData[0]);
Assert.AreEqual(110, edgeData.Weight);
Assert.AreEqual(null, edgeData.Direction);
Assert.AreEqual(1, edgeData.ContractedId);
edge = graph.GetEdgeEnumerator(1).FirstOrDefault(x => x.Neighbour == 0);
Assert.IsNotNull(edge);
edgeData = ContractedEdgeDataSerializer.Deserialize(edge.Data[0], edge.MetaData[0]);
Assert.AreEqual(100, edgeData.Weight);
Assert.AreEqual(null, edgeData.Direction);
Assert.AreEqual(Constants.NO_VERTEX, edgeData.ContractedId);
edge = graph.GetEdgeEnumerator(1).FirstOrDefault(x => x.Neighbour == 3);
Assert.IsNotNull(edge);
edgeData = ContractedEdgeDataSerializer.Deserialize(edge.Data[0], edge.MetaData[0]);
Assert.AreEqual(10, edgeData.Weight);
Assert.AreEqual(null, edgeData.Direction);
Assert.AreEqual(Constants.NO_VERTEX, edgeData.ContractedId);
edge = graph.GetEdgeEnumerator(2).FirstOrDefault(x => x.Neighbour == 3);
Assert.IsNotNull(edge);
edgeData = ContractedEdgeDataSerializer.Deserialize(edge.Data[0], edge.MetaData[0]);
Assert.AreEqual(10, edgeData.Weight);
Assert.AreEqual(null, edgeData.Direction);
Assert.AreEqual(Constants.NO_VERTEX, edgeData.ContractedId);
}
public void Test3Vertices()
{
// build graph.
var graph = new DirectedMetaGraph(ContractedEdgeDataSerializer.Size,
ContractedEdgeDataSerializer.MetaSize);
graph.AddEdge(0, 1, 100, null, Constants.NO_VERTEX);
graph.AddEdge(1, 0, 100, null, Constants.NO_VERTEX);
graph.AddEdge(1, 2, 100, null, Constants.NO_VERTEX);
graph.AddEdge(2, 1, 100, null, Constants.NO_VERTEX);
graph.Compress();
// contract graph.
var hierarchyBuilder = new HierarchyBuilder(graph, new EdgeDifferencePriorityCalculator(graph, new DykstraWitnessCalculator(int.MaxValue)),
new DykstraWitnessCalculator(int.MaxValue));
hierarchyBuilder.Run();
// check edges.
var edges01 = graph.GetEdgeEnumerator(0).FirstOrDefault(x => x.Neighbour == 1);
Assert.IsNotNull(edges01);
var edge10 = graph.GetEdgeEnumerator(1).FirstOrDefault(x => x.Neighbour == 0);
Assert.IsNull(edge10);
var edge12 = graph.GetEdgeEnumerator(1).FirstOrDefault(x => x.Neighbour == 0);
Assert.IsNull(edge12);
var edges21 = graph.GetEdgeEnumerator(2).FirstOrDefault(x => x.Neighbour == 1);
Assert.IsNotNull(edges21);
}
public void TestOneEdge()
{
// build graph.
var graph = new Itinero.Graphs.Graph(EdgeDataSerializer.Size);
graph.AddVertex(0);
graph.AddVertex(1);
graph.AddEdge(0, 1, EdgeDataSerializer.Serialize(new EdgeData()
{
Distance = 100,
Profile = 1
}));
// build speed profile function.
var speed = 100f / 3.6f;
Func <ushort, Factor> getFactor = (x) =>
{
return(new Factor()
{
Direction = 0,
Value = 1.0f / speed
});
};
// convert graph.
var directedGraph = new DirectedMetaGraph(ContractedEdgeDataSerializer.Size,
ContractedEdgeDataSerializer.MetaSize);
var algorithm = new DirectedGraphBuilder(graph, directedGraph, getFactor);
algorithm.Run();
// check result.
Assert.IsTrue(algorithm.HasRun);
Assert.IsTrue(algorithm.HasSucceeded);
directedGraph.Compress();
Assert.AreEqual(2, directedGraph.VertexCount);
Assert.AreEqual(2, directedGraph.EdgeCount);
// verify all edges.
var edges = directedGraph.GetEdgeEnumerator(0);
Assert.AreEqual(1, edges.Count);
var data = ContractedEdgeDataSerializer.Serialize(100 * getFactor(1).Value, null);
Assert.AreEqual(data, edges.First().Data[0]);
Assert.AreEqual(Constants.NO_VERTEX, edges.First().MetaData[0]);
Assert.AreEqual(1, edges.First().Neighbour);
edges = directedGraph.GetEdgeEnumerator(1);
Assert.AreEqual(1, edges.Count);
data = ContractedEdgeDataSerializer.Serialize(100 * getFactor(1).Value, null);
Assert.AreEqual(data, edges.First().Data[0]);
Assert.AreEqual(Constants.NO_VERTEX, edges.First().MetaData[0]);
Assert.AreEqual(0, edges.First().Neighbour);
}
public void TestUncontractedWitnessed()
{
// build graph.
var graph = new DirectedMetaGraph(ContractedEdgeDataSerializer.Size,
ContractedEdgeDataSerializer.MetaSize);
graph.AddEdge(0, 1, 100, null, Constants.NO_VERTEX);
graph.AddEdge(1, 0, 100, null, Constants.NO_VERTEX);
graph.AddEdge(1, 2, 100, null, Constants.NO_VERTEX);
graph.AddEdge(2, 1, 100, null, Constants.NO_VERTEX);
graph.AddEdge(1, 3, 10, null, Constants.NO_VERTEX);
graph.AddEdge(3, 1, 10, null, Constants.NO_VERTEX);
graph.AddEdge(3, 2, 10, null, Constants.NO_VERTEX);
graph.AddEdge(2, 3, 10, null, Constants.NO_VERTEX);
graph.Compress();
// contract graph.
var hierarchyBuilder = new Itinero.Algorithms.Contracted.Dual.HierarchyBuilder(graph,
new DykstraWitnessCalculator(graph.Graph, int.MaxValue));
hierarchyBuilder.ContractedFactor = 0;
hierarchyBuilder.DepthFactor = 0;
hierarchyBuilder.Run();
var edge = graph.GetEdgeEnumerator(0).FirstOrDefault(x => x.Neighbour == 1);
Assert.IsNotNull(edge);
var edgeData = ContractedEdgeDataSerializer.Deserialize(edge.Data[0], edge.MetaData[0]);
Assert.AreEqual(100, edgeData.Weight);
Assert.AreEqual(null, edgeData.Direction);
Assert.AreEqual(Constants.NO_VERTEX, edgeData.ContractedId);
edge = graph.GetEdgeEnumerator(2).FirstOrDefault(x => x.Neighbour == 1);
Assert.IsNotNull(edge);
edgeData = ContractedEdgeDataSerializer.Deserialize(edge.Data[0], edge.MetaData[0]);
Assert.AreEqual(100, edgeData.Weight);
Assert.AreEqual(null, edgeData.Direction);
Assert.AreEqual(Constants.NO_VERTEX, edgeData.ContractedId);
edge = graph.GetEdgeEnumerator(2).FirstOrDefault(x => x.Neighbour == 3);
Assert.IsNotNull(edge);
edgeData = ContractedEdgeDataSerializer.Deserialize(edge.Data[0], edge.MetaData[0]);
Assert.AreEqual(10, edgeData.Weight);
Assert.AreEqual(null, edgeData.Direction);
Assert.AreEqual(Constants.NO_VERTEX, edgeData.ContractedId);
edge = graph.GetEdgeEnumerator(3).FirstOrDefault(x => x.Neighbour == 1);
Assert.IsNotNull(edge);
edgeData = ContractedEdgeDataSerializer.Deserialize(edge.Data[0], edge.MetaData[0]);
Assert.AreEqual(10, edgeData.Weight);
Assert.AreEqual(null, edgeData.Direction);
Assert.AreEqual(Constants.NO_VERTEX, edgeData.ContractedId);
}
/// <summary>
/// Search forward from one vertex.
/// </summary>
/// <returns></returns>
private void SearchForward(BinaryHeap <EdgePath <T> > queue, EdgePath <T> current)
{
if (current != null)
{ // there is a next vertex found.
// check restrictions.
if (_restrictions != null &&
_restrictions.Update(current.Vertex) &&
_restrictions.Restricts(current.Vertex))
{ // vertex is restricted, don't settle.
return;
}
// get the edge enumerator.
var edgeEnumerator = _graph.GetEdgeEnumerator();
// add to the settled vertices.
EdgePath <T> previousLinkedRoute;
if (_forwardVisits.TryGetValue(current.Vertex, out previousLinkedRoute))
{
if (_weightHandler.IsLargerThan(previousLinkedRoute.Weight, current.Weight))
{ // settle the vertex again if it has a better weight.
_forwardVisits[current.Vertex] = current;
}
}
else
{ // settled the vertex.
_forwardVisits.Add(current.Vertex, current);
}
// get neighbours.
edgeEnumerator.MoveTo(current.Vertex);
// add the neighbours to the queue.
while (edgeEnumerator.MoveNext())
{
bool?neighbourDirection;
var neighbourWeight = _weightHandler.GetEdgeWeight(edgeEnumerator.Current, out neighbourDirection);
if (neighbourDirection == null || neighbourDirection.Value)
{ // the edge is forward, and is to higher or was not contracted at all.
var neighbourNeighbour = edgeEnumerator.Neighbour;
if (!_forwardVisits.ContainsKey(neighbourNeighbour))
{ // if not yet settled.
var routeToNeighbour = new EdgePath <T>(
neighbourNeighbour, _weightHandler.Add(current.Weight, neighbourWeight), current);
queue.Push(routeToNeighbour, _weightHandler.GetMetric(routeToNeighbour.Weight));
}
}
}
}
}
/// <summary>
/// Search forward from one vertex.
/// </summary>
/// <returns></returns>
private void SearchForward(BinaryHeap <uint> queue, uint cPointer, uint cVertex, T cWeight)
{
if (cPointer != uint.MaxValue)
{ // there is a next vertex found.
// add to the settled vertices.
uint ePointer; // the existing pointer.
if (_forwardVisits.TryGetValue(cVertex, out ePointer))
{
uint eVertex, ePreviousPointer;
T eWeight;
_weightHandler.GetPathTree(_pathTree, ePointer, out eVertex, out eWeight, out ePreviousPointer);
if (_weightHandler.IsLargerThan(eWeight, cWeight))
{ // settle the vertex again if it has a better weight.
_forwardVisits[cVertex] = cPointer;
}
else
{ // this is a worse settled, don't continue the search.
return;
}
}
else
{ // settled the vertex.
_forwardVisits.Add(cVertex, cPointer);
}
// get neighbours.
var edgeEnumerator = _graph.GetEdgeEnumerator();
edgeEnumerator.MoveTo(cVertex);
// add the neighbours to the queue.
while (edgeEnumerator.MoveNext())
{
var nWeightAndDirection = _weightHandler.GetEdgeWeight(edgeEnumerator.Current);
if (nWeightAndDirection.Direction.F)
{
var nVertex = edgeEnumerator.Neighbour;
if (!_forwardVisits.ContainsKey(nVertex))
{ // if not yet settled.
var nWeight = _weightHandler.Add(cWeight, nWeightAndDirection.Weight);
var nPointer = _weightHandler.AddPathTree(_pathTree, nVertex, nWeight,
cPointer);
queue.Push(nPointer, _weightHandler.GetMetric(nWeight));
}
}
}
}
}
/// <summary>
/// Expands a the shortest edge between the two given vertices.
/// </summary>
public static void ExpandEdge(this DirectedMetaGraph graph, uint vertex1, uint vertex2, List <uint> vertices, bool inverted,
bool forward)
{
var edgeEnumerator = graph.GetEdgeEnumerator();
edgeEnumerator.ExpandEdge(vertex1, vertex2, vertices, inverted, forward);
}
/// <summary>
/// Gets the shortest edge between two vertices.
/// </summary>
/// <returns></returns>
public static MetaEdge GetShortestEdge(this DirectedMetaGraph graph, uint vertex1, uint vertex2, Func <uint[], float?> getWeight)
{
var minWeight = float.MaxValue;
var edges = graph.GetEdgeEnumerator(vertex1);
MetaEdge edge = null;
while (edges.MoveNext())
{
if (edges.Neighbour == vertex2)
{ // the correct neighbour, get the weight.
var data = edges.Data;
var weight = getWeight(data);
if (weight.HasValue &&
weight.Value < minWeight)
{ // weight is better.
edge = new MetaEdge()
{
Data = data,
Neighbour = vertex2,
Id = edges.Id,
MetaData = edges.MetaData
};
minWeight = weight.Value;
}
}
}
return(edge);
}
/// <summary>
/// Updates the vertex info object with the given vertex.
/// </summary>
private void UpdateVertexInfo(uint v)
{
// update vertex info.
_vertexInfo.Clear();
_vertexInfo.Vertex = v;
var contracted = 0;
_contractionCount.TryGetValue(v, out contracted);
_vertexInfo.ContractedNeighbours = contracted;
var depth = 0;
_depth.TryGetValue(v, out depth);
_vertexInfo.Depth = depth;
// calculate shortcuts and witnesses.
_vertexInfo.AddRelevantEdges(_graph.GetEdgeEnumerator());
_vertexInfo.BuildShortcuts(_weightHandler);
_vertexInfo.Shortcuts.RemoveWitnessed(v, _witnessCalculator);
}
public void TestRemoveEdge()
{
var graph = new DirectedMetaGraph(1, 1, 10);
// add and remove edge.
graph.AddEdge(0, 1, 10, 100);
Assert.AreEqual(0, graph.RemoveEdge(1, 0));
Assert.AreEqual(1, graph.RemoveEdge(0, 1));
graph = new DirectedMetaGraph(1, 1, 10);
// add and remove edge.
graph.AddEdge(0, 1, 10, 100);
graph.AddEdge(0, 1, 20, 200);
Assert.AreEqual(2, graph.GetEdgeEnumerator(0).Count);
Assert.AreEqual(0, graph.RemoveEdge(1, 0));
Assert.AreEqual(2, graph.RemoveEdge(0, 1));
Assert.AreEqual(0, graph.GetEdgeEnumerator(0).Count);
graph = new DirectedMetaGraph(1, 1, 10);
// add and remove edge.
graph.AddEdge(0, 1, 10, 100);
graph.AddEdge(0, 1, 20, 200);
Assert.AreEqual(2, graph.GetEdgeEnumerator(0).Count);
Assert.AreEqual(0, graph.RemoveEdge(1, 0));
Assert.AreEqual(2, graph.RemoveEdge(0, 1));
Assert.AreEqual(0, graph.GetEdgeEnumerator(0).Count);
graph = new DirectedMetaGraph(1, 1, 10);
// add and remove edge.
graph.AddEdge(0, 1, 10, 100);
graph.AddEdge(0, 2, 20, 200);
graph.RemoveEdge(0, 1);
var edges = graph.GetEdgeEnumerator(0);
Assert.IsNotNull(edges);
Assert.AreEqual(2, edges.First().Neighbour);
}
public void TestDoubleContraction()
{
// build graph.
var graph = new DirectedMetaGraph(ContractedEdgeDataSerializer.Size,
ContractedEdgeDataSerializer.MetaSize);
graph.AddEdge(0, 2, 100, null, Constants.NO_VERTEX);
graph.AddEdge(2, 0, 100, null, Constants.NO_VERTEX);
graph.AddEdge(0, 3, 100, null, Constants.NO_VERTEX);
graph.AddEdge(3, 0, 100, null, Constants.NO_VERTEX);
graph.AddEdge(1, 2, 200, null, Constants.NO_VERTEX);
graph.AddEdge(2, 1, 200, null, Constants.NO_VERTEX);
graph.AddEdge(1, 3, 200, null, Constants.NO_VERTEX);
graph.AddEdge(3, 1, 200, null, Constants.NO_VERTEX);
graph.Compress();
// contract graph.
var priorityCalculator = new EdgeDifferencePriorityCalculator(graph, new DykstraWitnessCalculator(int.MaxValue));
priorityCalculator.DepthFactor = 0;
priorityCalculator.ContractedFactor = 0;
var hierarchyBuilder = new HierarchyBuilder(graph, priorityCalculator,
new DykstraWitnessCalculator(int.MaxValue));
hierarchyBuilder.Run();
// check edges.
var edge = graph.GetEdgeEnumerator(0).FirstOrDefault(x => x.Neighbour == 2);
Assert.IsNull(edge);
edge = graph.GetEdgeEnumerator(2).FirstOrDefault(x => x.Neighbour == 0);
Assert.IsNotNull(edge);
edge = graph.GetEdgeEnumerator(0).FirstOrDefault(x => x.Neighbour == 3);
Assert.IsNull(edge);
edge = graph.GetEdgeEnumerator(3).FirstOrDefault(x => x.Neighbour == 0);
Assert.IsNotNull(edge);
edge = graph.GetEdgeEnumerator(2).FirstOrDefault(x => x.Neighbour == 1);
Assert.IsNull(edge);
edge = graph.GetEdgeEnumerator(1).FirstOrDefault(x => x.Neighbour == 2);
Assert.IsNotNull(edge);
edge = graph.GetEdgeEnumerator(3).FirstOrDefault(x => x.Neighbour == 1);
Assert.IsNull(edge);
edge = graph.GetEdgeEnumerator(1).FirstOrDefault(x => x.Neighbour == 3);
Assert.IsNotNull(edge);
}
/// <summary>
/// Updates the vertex info object with the given vertex.
/// </summary>
/// <returns>True if succeeded, false if a witness calculation is required.</returns>
private bool UpdateVertexInfo(uint v)
{
var contracted = 0;
var depth = 0;
// update vertex info.
_vertexInfo.Clear();
_vertexInfo.Vertex = v;
_contractionCount.TryGetValue(v, out contracted);
_vertexInfo.ContractedNeighbours = contracted;
_depth.TryGetValue(v, out depth);
_vertexInfo.Depth = depth;
// add neighbours.
_vertexInfo.AddRelevantEdges(_graph.GetEdgeEnumerator());
// check if any of neighbours are in witness queue.
if (_witnessQueue.Count > 0)
{
for (var i = 0; i < _vertexInfo.Count; i++)
{
var m = _vertexInfo[i];
if (_witnessQueue.Contains(m.Neighbour))
{
//this.DoWitnessQueue();
//break;
return(false);
}
}
}
// build shortcuts.
_vertexInfo.BuildShortcuts(_weightHandler);
// remove witnessed shortcuts.
_vertexInfo.RemoveShortcuts(_witnessGraph, _weightHandler);
return(true);
}
public void Test2VerticesAgumented()
{
// build graph.
var graph = new DirectedMetaGraph(ContractedEdgeDataSerializer.Size,
ContractedEdgeDataSerializer.MetaAugmentedSize);
graph.AddEdge(0, 1, 100, null, Constants.NO_VERTEX, 50, 1000);
graph.AddEdge(1, 0, 100, null, Constants.NO_VERTEX, 50, 1000);
graph.Compress();
// contract graph.
var hierarchyBuilder = new Itinero.Algorithms.Contracted.Dual.HierarchyBuilder(graph,
new DykstraWitnessCalculator(graph.Graph, int.MaxValue));
hierarchyBuilder.Run();
// check edges.
var edges01 = graph.GetEdgeEnumerator(0).FirstOrDefault(x => x.Neighbour == 1);
Assert.IsNotNull(edges01);
var edge10 = graph.GetEdgeEnumerator(1).FirstOrDefault(x => x.Neighbour == 0);
Assert.IsNull(edge10);
}
public void TestSerialize()
{
var graph = new DirectedMetaGraph(1, 1, 10);
// add and compress.
graph.AddEdge(0, 1, 1, 100);
graph.Compress();
var expectedSize = 1 + 1 + 8 + 8 + 4 + 4 + // the header: two longs representing vertex and edge count and one int for edge size and one for vertex size.
graph.VertexCount * 2 * 4 + // the bytes for the vertex-index: 2 uint's.
graph.EdgeCount * 2 * 4 + // the bytes for the edges: one edge 1 uint.
4 + 4 + // the header for the meta-data: 2 uint for sizes.
graph.EdgeCount * 4; // the bytes for the edges: one edge 1 uint.
using (var stream = new System.IO.MemoryStream())
{
Assert.AreEqual(expectedSize, graph.Serialize(stream));
Assert.AreEqual(expectedSize, stream.Position);
}
// verify all edges.
var edges = graph.GetEdgeEnumerator(0);
Assert.AreEqual(1, edges.Count());
Assert.AreEqual(1, edges.First().Data[0]);
Assert.AreEqual(1, edges.First().Neighbour);
graph = new DirectedMetaGraph(1, 1, 10);
// add and compress.
graph.AddEdge(0, 1, 10, 100);
graph.AddEdge(1, 2, 20, 200);
graph.AddEdge(2, 3, 30, 300);
graph.AddEdge(3, 4, 40, 400);
graph.RemoveEdge(1, 2);
graph.Compress();
expectedSize = 1 + 1 + 8 + 8 + 4 + 4 + // the header: two longs representing vertex and edge count and one int for edge size and one for vertex size.
graph.VertexCount * 2 * 4 + // the bytes for the vertex-index: 2 uint's.
graph.EdgeCount * 2 * 4 + // the bytes for the edges: one edge 1 uint.
4 + 4 + // the header for the meta-data: 2 uint for sizes.
graph.EdgeCount * 4; // the bytes for the edges: one edge 1 uint.
using (var stream = new System.IO.MemoryStream())
{
Assert.AreEqual(expectedSize, graph.Serialize(stream));
Assert.AreEqual(expectedSize, stream.Position);
}
}
/// <summary>
/// Initializes and resets.
/// </summary>
public void Initialize()
{
// algorithm always succeeds, it may be dealing with an empty network and there are no targets.
this.HasSucceeded = true;
// intialize dykstra data structures.
_visits = new Dictionary <uint, EdgePath <T> >();
_heap = new BinaryHeap <EdgePath <T> >();
// queue all sources.
foreach (var source in _sources)
{
_heap.Push(source, _weightHandler.GetMetric(source.Weight));
}
// gets the edge enumerator.
_edgeEnumerator = _graph.GetEdgeEnumerator();
}
/// <summary>
/// Initializes and resets.
/// </summary>
public void Initialize()
{
// algorithm always succeeds, it may be dealing with an empty network and there are no targets.
this.HasSucceeded = true;
// intialize dykstra data structures.
_pointerHeap = new BinaryHeap <uint>();
_pathTree = new PathTree();
_visited = new HashSet <uint>();
// queue source.
if (_source.Vertex1 != Constants.NO_VERTEX)
{
_pointerHeap.Push(_weightHandler.AddPathTree(_pathTree, _source.Vertex1, _source.Weight1, uint.MaxValue), 0);
}
if (_source.Vertex2 != Constants.NO_VERTEX)
{
_pointerHeap.Push(_weightHandler.AddPathTree(_pathTree, _source.Vertex2, _source.Weight2, uint.MaxValue), 0);
}
// gets the edge enumerator.
_edgeEnumerator = _graph.GetEdgeEnumerator();
}
/// <summary>
/// Remove all witnessed edges.
/// </summary>
private void RemoveWitnessedEdges()
{
_logger.Log(TraceEventType.Information, "Removing witnessed edges...");
var witnessEdgeEnumerator = _witnessGraph.GetEdgeEnumerator();
var edgeEnumerator = _graph.GetEdgeEnumerator();
var edges = new List <MetaEdge>();
for (uint vertex = 0; vertex < _graph.VertexCount; vertex++)
{
// collect all relevant edges.
edges.Clear();
if (witnessEdgeEnumerator.MoveTo(vertex) &&
edgeEnumerator.MoveTo(vertex))
{
while (edgeEnumerator.MoveNext())
{
if (vertex < edgeEnumerator.Neighbour)
{ // only check in on directions, all edges are added twice initially.
edges.Add(edgeEnumerator.Current);
}
}
}
// check witness paths.
for (var i = 0; i < edges.Count; i++)
{
var edge = edges[0];
while (witnessEdgeEnumerator.MoveNext())
{
if (witnessEdgeEnumerator.Neighbour == edge.Neighbour)
{ // this edge is witnessed, figure out how.
var forwardWitnessWeight = DirectedGraphExtensions.FromData(witnessEdgeEnumerator.Data0);
var backwardWitnessWeight = DirectedGraphExtensions.FromData(witnessEdgeEnumerator.Data1);
var weightAndDir = _weightHandler.GetEdgeWeight(edge);
var weight = _weightHandler.GetMetric(weightAndDir.Weight);
var witnessed = false;
if (weightAndDir.Direction.F &&
weight > forwardWitnessWeight)
{ // witnessed in forward direction.
weightAndDir.Direction = new Dir(false, weightAndDir.Direction.B);
witnessed = true;
}
if (weightAndDir.Direction.B &&
weight > backwardWitnessWeight)
{ // witnessed in backward direction.
weightAndDir.Direction = new Dir(weightAndDir.Direction.F, false);
witnessed = true;
}
if (witnessed)
{ // edge was witnessed, do something.
// remove the edge (in both directions)
_graph.RemoveEdge(vertex, edge.Neighbour);
_graph.RemoveEdge(edge.Neighbour, vertex);
if (weightAndDir.Direction.B || weightAndDir.Direction.F)
{ // add it again if there is something relevant still left.
_weightHandler.AddEdge(_graph, vertex, edge.Neighbour, Constants.NO_VERTEX,
weightAndDir.Direction.AsNullableBool(), weightAndDir.Weight);
weightAndDir.Direction.Reverse();
_weightHandler.AddEdge(_graph, edge.Neighbour, vertex, Constants.NO_VERTEX,
weightAndDir.Direction.AsNullableBool(), weightAndDir.Weight);
}
}
}
}
}
}
}
public void TestCompress()
{
var graph = new DirectedMetaGraph(1, 1, 10);
// add and compress.
graph.AddEdge(0, 1, 1, 100);
graph.Compress();
// verify all edges.
var edges = graph.GetEdgeEnumerator(0);
Assert.AreEqual(1, edges.Count());
Assert.AreEqual(1, edges.First().Data[0]);
Assert.AreEqual(1, edges.First().Neighbour);
graph = new DirectedMetaGraph(1, 1, 10);
// add and compress.
graph.AddEdge(0, 1, 10, 100);
graph.AddEdge(1, 2, 20, 200);
graph.AddEdge(2, 3, 30, 300);
graph.AddEdge(3, 4, 40, 400);
graph.RemoveEdge(1, 2);
// verify all edges.
edges = graph.GetEdgeEnumerator(0);
Assert.AreEqual(1, edges.Count());
Assert.AreEqual(10, edges.First().Data[0]);
Assert.AreEqual(100, edges.First().MetaData[0]);
Assert.AreEqual(1, edges.First().Neighbour);
edges = graph.GetEdgeEnumerator(1);
Assert.AreEqual(0, edges.Count());
edges = graph.GetEdgeEnumerator(2);
Assert.AreEqual(1, edges.Count());
Assert.AreEqual(30, edges.First().Data[0]);
Assert.AreEqual(300, edges.First().MetaData[0]);
Assert.AreEqual(3, edges.First().Neighbour);
edges = graph.GetEdgeEnumerator(3);
Assert.AreEqual(1, edges.Count());
Assert.AreEqual(40, edges.First().Data[0]);
Assert.AreEqual(400, edges.First().MetaData[0]);
Assert.AreEqual(4, edges.First().Neighbour);
// compress.
graph.Compress();
// verify all edges.
edges = graph.GetEdgeEnumerator(0);
Assert.AreEqual(1, edges.Count());
Assert.AreEqual(10, edges.First().Data[0]);
Assert.AreEqual(100, edges.First().MetaData[0]);
Assert.AreEqual(1, edges.First().Neighbour);
edges = graph.GetEdgeEnumerator(1);
Assert.AreEqual(0, edges.Count());
edges = graph.GetEdgeEnumerator(2);
Assert.AreEqual(1, edges.Count());
Assert.AreEqual(30, edges.First().Data[0]);
Assert.AreEqual(300, edges.First().MetaData[0]);
Assert.AreEqual(3, edges.First().Neighbour);
edges = graph.GetEdgeEnumerator(3);
Assert.AreEqual(1, edges.Count());
Assert.AreEqual(40, edges.First().Data[0]);
Assert.AreEqual(400, edges.First().MetaData[0]);
Assert.AreEqual(4, edges.First().Neighbour);
}
/// <summary>
/// Calculates the priority of the given vertex.
/// </summary>
public float Calculate(BitArray32 contractedFlags, uint vertex)
{
var removed = 0;
var added = 0;
// get and keep edges.
var edges = new List <Edge>(_graph.Graph.GetEdgeEnumerator(vertex));
// remove 'downward' edge to vertex.
var i = 0;
while (i < edges.Count)
{
var edgeEnumerator = _graph.GetEdgeEnumerator(edges[i].Neighbour);
edgeEnumerator.Reset();
while (edgeEnumerator.MoveNext())
{
if (edgeEnumerator.Neighbour == vertex)
{
removed++;
}
}
if (contractedFlags[edges[i].Neighbour])
{ // neighbour was already contracted, remove 'downward' edge and exclude it.
edgeEnumerator.MoveTo(vertex);
edgeEnumerator.Reset();
while (edgeEnumerator.MoveNext())
{
if (edgeEnumerator.Neighbour == edges[i].Neighbour)
{
removed++;
}
}
edges.RemoveAt(i);
}
else
{ // move to next edge.
i++;
}
}
// loop over all edge-pairs once.
for (var j = 1; j < edges.Count; j++)
{
var edge1 = edges[j];
float edge1Weight;
bool? edge1Direction;
Data.Contracted.Edges.ContractedEdgeDataSerializer.Deserialize(edge1.Data[0],
out edge1Weight, out edge1Direction);
var edge1CanMoveForward = edge1Direction == null || edge1Direction.Value;
var edge1CanMoveBackward = edge1Direction == null || !edge1Direction.Value;
// figure out what witness paths to calculate.
var forwardWitnesses = new bool[j];
var backwardWitnesses = new bool[j];
var targets = new List <uint>(j);
var targetWeights = new List <float>(j);
for (var k = 0; k < j; k++)
{
var edge2 = edges[k];
float edge2Weight;
bool? edge2Direction;
Data.Contracted.Edges.ContractedEdgeDataSerializer.Deserialize(edge2.Data[0],
out edge2Weight, out edge2Direction);
var edge2CanMoveForward = edge2Direction == null || edge2Direction.Value;
var edge2CanMoveBackward = edge2Direction == null || !edge2Direction.Value;
forwardWitnesses[k] = !(edge1CanMoveBackward && edge2CanMoveForward);
backwardWitnesses[k] = !(edge1CanMoveForward && edge2CanMoveBackward);
targets.Add(edge2.Neighbour);
targetWeights.Add(edge1Weight + edge2Weight);
}
// calculate all witness paths.
_witnessCalculator.Calculate(_graph.Graph, edge1.Neighbour, targets, targetWeights,
ref forwardWitnesses, ref backwardWitnesses, vertex);
// add contracted edges if needed.
for (var k = 0; k < j; k++)
{
var edge2 = edges[k];
var removedLocal = 0;
var addedLocal = 0;
if (!forwardWitnesses[k] && !backwardWitnesses[k])
{ // add bidirectional edge.
_graph.TryAddOrUpdateEdge(edge1.Neighbour, edge2.Neighbour,
targetWeights[k], null, vertex, out addedLocal, out removedLocal);
added += addedLocal;
removed += removedLocal;
_graph.TryAddOrUpdateEdge(edge2.Neighbour, edge1.Neighbour,
targetWeights[k], null, vertex, out addedLocal, out removedLocal);
added += addedLocal;
removed += removedLocal;
}
else if (!forwardWitnesses[k])
{ // add forward edge.
_graph.TryAddOrUpdateEdge(edge1.Neighbour, edge2.Neighbour,
targetWeights[k], true, vertex, out addedLocal, out removedLocal);
added += addedLocal;
removed += removedLocal;
_graph.TryAddOrUpdateEdge(edge2.Neighbour, edge1.Neighbour,
targetWeights[k], false, vertex, out addedLocal, out removedLocal);
added += addedLocal;
removed += removedLocal;
}
else if (!backwardWitnesses[k])
{ // add forward edge.
_graph.TryAddOrUpdateEdge(edge1.Neighbour, edge2.Neighbour,
targetWeights[k], false, vertex, out addedLocal, out removedLocal);
added += addedLocal;
removed += removedLocal;
_graph.TryAddOrUpdateEdge(edge2.Neighbour, edge1.Neighbour,
targetWeights[k], true, vertex, out addedLocal, out removedLocal);
added += addedLocal;
removed += removedLocal;
}
}
}
var contracted = 0;
_contractionCount.TryGetValue(vertex, out contracted);
var depth = 0;
_depth.TryGetValue(vertex, out depth);
return(this.DifferenceFactor * (added - removed) + (this.DepthFactor * depth) +
(this.ContractedFactor * contracted));
}
public void TestAddEdge()
{
var graph = new DirectedMetaGraph(1, 1, 10);
// add edge.
graph.AddEdge(0, 1, 10, 100);
// verify all edges.
var edges = graph.GetEdgeEnumerator(0);
Assert.AreEqual(1, edges.Count());
Assert.AreEqual(10, edges.First().Data[0]);
Assert.AreEqual(100, edges.First().MetaData[0]);
Assert.AreEqual(1, edges.First().Neighbour);
edges = graph.GetEdgeEnumerator(1);
Assert.AreEqual(0, edges.Count());
// add another edge.
graph.AddEdge(1, 2, 20, 200);
// verify all edges.
edges = graph.GetEdgeEnumerator(0);
Assert.AreEqual(1, edges.Count());
Assert.AreEqual(10, edges.First().Data[0]);
Assert.AreEqual(100, edges.First().MetaData[0]);
Assert.AreEqual(1, edges.First().Neighbour);
edges = graph.GetEdgeEnumerator(1);
Assert.AreEqual(1, edges.Count());
Assert.AreEqual(20, edges.First().Data[0]);
Assert.AreEqual(200, edges.First().MetaData[0]);
Assert.AreEqual(2, edges.First().Neighbour);
edges = graph.GetEdgeEnumerator(2);
Assert.AreEqual(0, edges.Count());
// add another edge.
graph.AddEdge(1, 3, 30, 300);
// verify all edges.
edges = graph.GetEdgeEnumerator(0);
Assert.AreEqual(1, edges.Count());
Assert.AreEqual(10, edges.First().Data[0]);
Assert.AreEqual(100, edges.First().MetaData[0]);
Assert.AreEqual(1, edges.First().Neighbour);
edges = graph.GetEdgeEnumerator(1);
Assert.AreEqual(2, edges.Count());
Assert.IsTrue(edges.Any(x => x.Neighbour == 2));
Assert.AreEqual(20, edges.First(x => x.Neighbour == 2).Data[0]);
Assert.AreEqual(200, edges.First(x => x.Neighbour == 2).MetaData[0]);
Assert.IsTrue(edges.Any(x => x.Neighbour == 3));
Assert.AreEqual(30, edges.First(x => x.Neighbour == 3).Data[0]);
Assert.AreEqual(300, edges.First(x => x.Neighbour == 3).MetaData[0]);
edges = graph.GetEdgeEnumerator(2);
Assert.AreEqual(0, edges.Count());
edges = graph.GetEdgeEnumerator(3);
Assert.AreEqual(0, edges.Count());
// add another edge but in reverse.
graph.AddEdge(3, 1, 30, 300);
// verify all edges.
edges = graph.GetEdgeEnumerator(0);
Assert.AreEqual(1, edges.Count());
Assert.AreEqual(10, edges.First().Data[0]);
Assert.AreEqual(100, edges.First().MetaData[0]);
Assert.AreEqual(1, edges.First().Neighbour);
edges = graph.GetEdgeEnumerator(1);
Assert.AreEqual(2, edges.Count());
Assert.IsTrue(edges.Any(x => x.Neighbour == 2));
Assert.AreEqual(20, edges.First(x => x.Neighbour == 2).Data[0]);
Assert.AreEqual(200, edges.First(x => x.Neighbour == 2).MetaData[0]);
Assert.IsTrue(edges.Any(x => x.Neighbour == 3));
Assert.AreEqual(30, edges.First(x => x.Neighbour == 3).Data[0]);
Assert.AreEqual(300, edges.First(x => x.Neighbour == 3).MetaData[0]);
edges = graph.GetEdgeEnumerator(2);
Assert.AreEqual(0, edges.Count());
edges = graph.GetEdgeEnumerator(3);
Assert.AreEqual(1, edges.Count());
Assert.AreEqual(30, edges.First().Data[0]);
Assert.AreEqual(300, edges.First().MetaData[0]);
Assert.AreEqual(1, edges.First().Neighbour);
// add another edge and start a new island.
graph.AddEdge(4, 5, 40, 400);
// verify all edges.
edges = graph.GetEdgeEnumerator(0);
Assert.AreEqual(1, edges.Count());
Assert.AreEqual(10, edges.First().Data[0]);
Assert.AreEqual(100, edges.First().MetaData[0]);
Assert.AreEqual(1, edges.First().Neighbour);
edges = graph.GetEdgeEnumerator(1);
Assert.AreEqual(2, edges.Count());
Assert.IsTrue(edges.Any(x => x.Neighbour == 2));
Assert.AreEqual(20, edges.First(x => x.Neighbour == 2).Data[0]);
Assert.AreEqual(200, edges.First(x => x.Neighbour == 2).MetaData[0]);
Assert.IsTrue(edges.Any(x => x.Neighbour == 3));
Assert.AreEqual(30, edges.First(x => x.Neighbour == 3).Data[0]);
Assert.AreEqual(300, edges.First(x => x.Neighbour == 3).MetaData[0]);
edges = graph.GetEdgeEnumerator(2);
Assert.AreEqual(0, edges.Count());
edges = graph.GetEdgeEnumerator(3);
Assert.AreEqual(1, edges.Count());
Assert.AreEqual(30, edges.First().Data[0]);
Assert.AreEqual(300, edges.First().MetaData[0]);
Assert.AreEqual(1, edges.First().Neighbour);
edges = graph.GetEdgeEnumerator(4);
Assert.AreEqual(1, edges.Count());
Assert.AreEqual(40, edges.First().Data[0]);
Assert.AreEqual(400, edges.First().MetaData[0]);
Assert.AreEqual(5, edges.First().Neighbour);
edges = graph.GetEdgeEnumerator(5);
Assert.AreEqual(0, edges.Count());
// connect the islands.
graph.AddEdge(5, 3, 50, 500);
// verify all edges.
edges = graph.GetEdgeEnumerator(0);
Assert.AreEqual(1, edges.Count());
Assert.AreEqual(10, edges.First().Data[0]);
Assert.AreEqual(100, edges.First().MetaData[0]);
Assert.AreEqual(1, edges.First().Neighbour);
edges = graph.GetEdgeEnumerator(1);
Assert.AreEqual(2, edges.Count());
Assert.IsTrue(edges.Any(x => x.Neighbour == 2));
Assert.AreEqual(20, edges.First(x => x.Neighbour == 2).Data[0]);
Assert.AreEqual(200, edges.First(x => x.Neighbour == 2).MetaData[0]);
Assert.IsTrue(edges.Any(x => x.Neighbour == 3));
Assert.AreEqual(30, edges.First(x => x.Neighbour == 3).Data[0]);
Assert.AreEqual(300, edges.First(x => x.Neighbour == 3).MetaData[0]);
edges = graph.GetEdgeEnumerator(2);
Assert.AreEqual(0, edges.Count());
edges = graph.GetEdgeEnumerator(3);
Assert.AreEqual(1, edges.Count());
Assert.AreEqual(30, edges.First().Data[0]);
Assert.AreEqual(300, edges.First().MetaData[0]);
Assert.AreEqual(1, edges.First().Neighbour);
edges = graph.GetEdgeEnumerator(4);
Assert.AreEqual(1, edges.Count());
Assert.AreEqual(40, edges.First().Data[0]);
Assert.AreEqual(400, edges.First().MetaData[0]);
Assert.AreEqual(5, edges.First().Neighbour);
edges = graph.GetEdgeEnumerator(5);
Assert.AreEqual(1, edges.Count());
Assert.AreEqual(50, edges.First().Data[0]);
Assert.AreEqual(500, edges.First().MetaData[0]);
Assert.AreEqual(3, edges.First().Neighbour);
graph.AddEdge(1, 6, 60, 600);
// verify all edges.
edges = graph.GetEdgeEnumerator(0);
Assert.AreEqual(1, edges.Count());
Assert.AreEqual(10, edges.First().Data[0]);
Assert.AreEqual(100, edges.First().MetaData[0]);
Assert.AreEqual(1, edges.First().Neighbour);
edges = graph.GetEdgeEnumerator(1);
Assert.AreEqual(3, edges.Count());
Assert.IsTrue(edges.Any(x => x.Neighbour == 2));
Assert.AreEqual(20, edges.First(x => x.Neighbour == 2).Data[0]);
Assert.AreEqual(200, edges.First(x => x.Neighbour == 2).MetaData[0]);
Assert.IsTrue(edges.Any(x => x.Neighbour == 3));
Assert.AreEqual(30, edges.First(x => x.Neighbour == 3).Data[0]);
Assert.AreEqual(300, edges.First(x => x.Neighbour == 3).MetaData[0]);
Assert.IsTrue(edges.Any(x => x.Neighbour == 6));
Assert.AreEqual(60, edges.First(x => x.Neighbour == 6).Data[0]);
Assert.AreEqual(600, edges.First(x => x.Neighbour == 6).MetaData[0]);
edges = graph.GetEdgeEnumerator(2);
Assert.AreEqual(0, edges.Count());
edges = graph.GetEdgeEnumerator(3);
Assert.AreEqual(1, edges.Count());
Assert.AreEqual(30, edges.First().Data[0]);
Assert.AreEqual(300, edges.First().MetaData[0]);
Assert.AreEqual(1, edges.First().Neighbour);
edges = graph.GetEdgeEnumerator(4);
Assert.AreEqual(1, edges.Count());
Assert.AreEqual(40, edges.First().Data[0]);
Assert.AreEqual(400, edges.First().MetaData[0]);
Assert.AreEqual(5, edges.First().Neighbour);
edges = graph.GetEdgeEnumerator(5);
Assert.AreEqual(1, edges.Count());
Assert.AreEqual(50, edges.First().Data[0]);
Assert.AreEqual(500, edges.First().MetaData[0]);
Assert.AreEqual(3, edges.First().Neighbour);
graph.AddEdge(1, 7, 70, 700);
// verify all edges.
edges = graph.GetEdgeEnumerator(0);
Assert.AreEqual(1, edges.Count());
Assert.AreEqual(10, edges.First().Data[0]);
Assert.AreEqual(100, edges.First().MetaData[0]);
Assert.AreEqual(1, edges.First().Neighbour);
edges = graph.GetEdgeEnumerator(1);
Assert.AreEqual(4, edges.Count());
Assert.IsTrue(edges.Any(x => x.Neighbour == 2));
Assert.AreEqual(20, edges.First(x => x.Neighbour == 2).Data[0]);
Assert.AreEqual(200, edges.First(x => x.Neighbour == 2).MetaData[0]);
Assert.IsTrue(edges.Any(x => x.Neighbour == 3));
Assert.AreEqual(30, edges.First(x => x.Neighbour == 3).Data[0]);
Assert.AreEqual(300, edges.First(x => x.Neighbour == 3).MetaData[0]);
Assert.IsTrue(edges.Any(x => x.Neighbour == 6));
Assert.AreEqual(60, edges.First(x => x.Neighbour == 6).Data[0]);
Assert.AreEqual(600, edges.First(x => x.Neighbour == 6).MetaData[0]);
Assert.IsTrue(edges.Any(x => x.Neighbour == 7));
Assert.AreEqual(70, edges.First(x => x.Neighbour == 7).Data[0]);
Assert.AreEqual(700, edges.First(x => x.Neighbour == 7).MetaData[0]);
edges = graph.GetEdgeEnumerator(2);
Assert.AreEqual(0, edges.Count());
edges = graph.GetEdgeEnumerator(3);
Assert.AreEqual(1, edges.Count());
Assert.AreEqual(30, edges.First().Data[0]);
Assert.AreEqual(300, edges.First().MetaData[0]);
Assert.AreEqual(1, edges.First().Neighbour);
edges = graph.GetEdgeEnumerator(4);
Assert.AreEqual(1, edges.Count());
Assert.AreEqual(40, edges.First().Data[0]);
Assert.AreEqual(400, edges.First().MetaData[0]);
Assert.AreEqual(5, edges.First().Neighbour);
edges = graph.GetEdgeEnumerator(5);
Assert.AreEqual(1, edges.Count());
Assert.AreEqual(50, edges.First().Data[0]);
Assert.AreEqual(500, edges.First().MetaData[0]);
Assert.AreEqual(3, edges.First().Neighbour);
}
public void TestGetEdgeEnumerator()
{
var graph = new DirectedMetaGraph(1, 1, 10);
// add edges.
graph.AddEdge(0, 1, 1, 100);
graph.AddEdge(1, 2, 2, 200);
graph.AddEdge(1, 3, 3, 300);
graph.AddEdge(3, 4, 4, 400);
graph.AddEdge(4, 1, 5, 500);
graph.AddEdge(5, 1, 6, 600);
// get empty edge enumerator.
var edges = graph.GetEdgeEnumerator();
// move to vertices and test result.
Assert.IsTrue(edges.MoveTo(0));
Assert.AreEqual(1, edges.Count());
Assert.AreEqual(1, edges.First().Data[0]);
Assert.AreEqual(100, edges.First().MetaData[0]);
Assert.AreEqual(1, edges.First().Neighbour);
Assert.IsTrue(edges.MoveTo(1));
Assert.AreEqual(2, edges.Count());
Assert.IsTrue(edges.Any(x => x.Neighbour == 2));
Assert.AreEqual(2, edges.First(x => x.Neighbour == 2).Data[0]);
Assert.AreEqual(200, edges.First(x => x.Neighbour == 2).MetaData[0]);
Assert.IsTrue(edges.Any(x => x.Neighbour == 3));
Assert.AreEqual(3, edges.First(x => x.Neighbour == 3).Data[0]);
Assert.AreEqual(300, edges.First(x => x.Neighbour == 3).MetaData[0]);
Assert.IsFalse(edges.MoveTo(2));
Assert.IsTrue(edges.MoveTo(3));
Assert.AreEqual(1, edges.Count());
Assert.IsTrue(edges.Any(x => x.Neighbour == 4));
Assert.AreEqual(4, edges.First(x => x.Neighbour == 4).Data[0]);
Assert.AreEqual(400, edges.First(x => x.Neighbour == 4).MetaData[0]);
Assert.IsTrue(edges.MoveTo(4));
Assert.AreEqual(1, edges.Count());
Assert.IsTrue(edges.Any(x => x.Neighbour == 1));
Assert.AreEqual(5, edges.First(x => x.Neighbour == 1).Data[0]);
Assert.AreEqual(500, edges.First(x => x.Neighbour == 1).MetaData[0]);
Assert.IsTrue(edges.MoveTo(5));
Assert.AreEqual(1, edges.Count());
Assert.IsTrue(edges.Any(x => x.Neighbour == 1));
Assert.AreEqual(6, edges.First(x => x.Neighbour == 1).Data[0]);
Assert.AreEqual(600, edges.First(x => x.Neighbour == 1).MetaData[0]);
graph = new DirectedMetaGraph(1, 1, 10);
// add edge.
graph.AddEdge(0, 1, 1, 100);
graph.AddEdge(0, 11001, 1, 100);
graph.AddEdge(0, 11001, 2, 200);
edges = graph.GetEdgeEnumerator();
// move to vertices and test result.
Assert.IsTrue(edges.MoveTo(0));
Assert.AreEqual(3, edges.Count());
}
public void TestAddOrUpdateEdge()
{
// build graph.
var graph = new DirectedMetaGraph(ContractedEdgeDataSerializer.Size,
ContractedEdgeDataSerializer.MetaSize);
graph.AddEdge(0, 1, 100, null, Constants.NO_VERTEX);
// update.
graph.AddOrUpdateEdge(0, 1, 99, null, Constants.NO_VERTEX);
// check result.
var edges = new List <MetaEdge>(graph.GetEdgeEnumerator(0).Where(x => x.Neighbour == 1));
Assert.AreEqual(1, edges.Count);
Assert.AreEqual(1, edges[0].Neighbour);
var edgeData = ContractedEdgeDataSerializer.Deserialize(edges[0].Data[0], edges[0].MetaData[0]);
Assert.AreEqual(null, edgeData.Direction);
Assert.AreEqual(Constants.NO_VERTEX, edgeData.ContractedId);
Assert.AreEqual(99, edgeData.Weight);
// build graph.
graph = new DirectedMetaGraph(ContractedEdgeDataSerializer.Size,
ContractedEdgeDataSerializer.MetaSize);
graph.AddEdge(0, 1, 100, null, Constants.NO_VERTEX);
// update.
graph.AddOrUpdateEdge(0, 1, 101, null, Constants.NO_VERTEX);
// check result.
edges = new List <MetaEdge>(graph.GetEdgeEnumerator(0).Where(x => x.Neighbour == 1));
Assert.AreEqual(1, edges.Count);
Assert.AreEqual(1, edges[0].Neighbour);
edgeData = ContractedEdgeDataSerializer.Deserialize(edges[0].Data[0], edges[0].MetaData[0]);
Assert.AreEqual(null, edgeData.Direction);
Assert.AreEqual(Constants.NO_VERTEX, edgeData.ContractedId);
Assert.AreEqual(100, edgeData.Weight);
// build graph.
graph = new DirectedMetaGraph(ContractedEdgeDataSerializer.Size,
ContractedEdgeDataSerializer.MetaSize);
graph.AddEdge(0, 1, 100, true, Constants.NO_VERTEX);
// update.
graph.AddOrUpdateEdge(0, 1, 99, true, Constants.NO_VERTEX);
// check result.
edges = new List <MetaEdge>(graph.GetEdgeEnumerator(0).Where(x => x.Neighbour == 1));
Assert.AreEqual(1, edges.Count);
Assert.AreEqual(1, edges[0].Neighbour);
edgeData = ContractedEdgeDataSerializer.Deserialize(edges[0].Data[0], edges[0].MetaData[0]);
Assert.AreEqual(true, edgeData.Direction);
Assert.AreEqual(Constants.NO_VERTEX, edgeData.ContractedId);
Assert.AreEqual(99, edgeData.Weight);
// build graph.
graph = new DirectedMetaGraph(ContractedEdgeDataSerializer.Size,
ContractedEdgeDataSerializer.MetaSize);
graph.AddEdge(0, 1, 100, null, Constants.NO_VERTEX);
// update.
graph.AddOrUpdateEdge(0, 1, 99, true, Constants.NO_VERTEX);
// check result.
var edge = graph.GetEdgeEnumerator(0).First(x => x.Neighbour == 1 &&
ContractedEdgeDataSerializer.Deserialize(x.Data[0], x.MetaData[0]).Direction == false);
Assert.IsNotNull(edge);
edgeData = ContractedEdgeDataSerializer.Deserialize(edge.Data[0], edge.MetaData[0]);
Assert.AreEqual(Constants.NO_VERTEX, edgeData.ContractedId);
Assert.AreEqual(100, edgeData.Weight);
edge = graph.GetEdgeEnumerator(0).First(x => x.Neighbour == 1 &&
ContractedEdgeDataSerializer.Deserialize(x.Data[0], x.MetaData[0]).Direction == true);
Assert.IsNotNull(edge);
edgeData = ContractedEdgeDataSerializer.Deserialize(edge.Data[0], edge.MetaData[0]);
Assert.AreEqual(Constants.NO_VERTEX, edgeData.ContractedId);
Assert.AreEqual(99, edgeData.Weight);
// build graph.
graph = new DirectedMetaGraph(ContractedEdgeDataSerializer.Size,
ContractedEdgeDataSerializer.MetaSize);
graph.AddEdge(0, 1, 100, false, Constants.NO_VERTEX);
// update.
graph.AddOrUpdateEdge(0, 1, 99, true, Constants.NO_VERTEX);
// check result.
edge = graph.GetEdgeEnumerator(0).First(x => x.Neighbour == 1 &&
ContractedEdgeDataSerializer.Deserialize(x.Data[0], x.MetaData[0]).Direction == false);
Assert.IsNotNull(edge);
edgeData = ContractedEdgeDataSerializer.Deserialize(edge.Data[0], edge.MetaData[0]);
Assert.AreEqual(Constants.NO_VERTEX, edgeData.ContractedId);
Assert.AreEqual(100, edgeData.Weight);
edge = graph.GetEdgeEnumerator(0).First(x => x.Neighbour == 1 &&
ContractedEdgeDataSerializer.Deserialize(x.Data[0], x.MetaData[0]).Direction == true);
Assert.IsNotNull(edge);
edgeData = ContractedEdgeDataSerializer.Deserialize(edge.Data[0], edge.MetaData[0]);
Assert.AreEqual(Constants.NO_VERTEX, edgeData.ContractedId);
Assert.AreEqual(99, edgeData.Weight);
// build graph.
graph = new DirectedMetaGraph(ContractedEdgeDataSerializer.Size,
ContractedEdgeDataSerializer.MetaSize);
graph.AddEdge(0, 1, 100, false, Constants.NO_VERTEX);
graph.AddEdge(0, 1, 99, true, Constants.NO_VERTEX);
// update.
graph.AddOrUpdateEdge(0, 1, 98, null, Constants.NO_VERTEX);
// check result.
edge = graph.GetEdgeEnumerator(0).First(x => x.Neighbour == 1 &&
ContractedEdgeDataSerializer.Deserialize(x.Data[0], x.MetaData[0]).Direction == null);
Assert.IsNotNull(edge);
edgeData = ContractedEdgeDataSerializer.Deserialize(edge.Data[0], edge.MetaData[0]);
Assert.AreEqual(Constants.NO_VERTEX, edgeData.ContractedId);
Assert.AreEqual(98, edgeData.Weight);
// build graph.
graph = new DirectedMetaGraph(ContractedEdgeDataSerializer.Size,
ContractedEdgeDataSerializer.MetaSize);
graph.AddEdge(0, 1, 100, false, Constants.NO_VERTEX);
graph.AddEdge(0, 1, 98, true, Constants.NO_VERTEX);
// update.
graph.AddOrUpdateEdge(0, 1, 99, null, Constants.NO_VERTEX);
// check result.
edge = graph.GetEdgeEnumerator(0).First(x => x.Neighbour == 1 &&
ContractedEdgeDataSerializer.Deserialize(x.Data[0], x.MetaData[0]).Direction == false);
Assert.IsNotNull(edge);
edgeData = ContractedEdgeDataSerializer.Deserialize(edge.Data[0], edge.MetaData[0]);
Assert.AreEqual(Constants.NO_VERTEX, edgeData.ContractedId);
Assert.AreEqual(99, edgeData.Weight);
edge = graph.GetEdgeEnumerator(0).First(x => x.Neighbour == 1 &&
ContractedEdgeDataSerializer.Deserialize(x.Data[0], x.MetaData[0]).Direction == true);
Assert.IsNotNull(edge);
edgeData = ContractedEdgeDataSerializer.Deserialize(edge.Data[0], edge.MetaData[0]);
Assert.AreEqual(Constants.NO_VERTEX, edgeData.ContractedId);
Assert.AreEqual(98, edgeData.Weight);
// build graph.
graph = new DirectedMetaGraph(ContractedEdgeDataSerializer.Size,
ContractedEdgeDataSerializer.MetaSize);
graph.AddEdge(0, 1, 100, null, Constants.NO_VERTEX);
// update.
graph.AddOrUpdateEdge(0, 2, 99, null, Constants.NO_VERTEX);
// check result.
edge = graph.GetEdgeEnumerator(0).First(x => x.Neighbour == 2 &&
ContractedEdgeDataSerializer.Deserialize(x.Data[0], x.MetaData[0]).Direction == null);
Assert.IsNotNull(edge);
edgeData = ContractedEdgeDataSerializer.Deserialize(edge.Data[0], edge.MetaData[0]);
Assert.AreEqual(Constants.NO_VERTEX, edgeData.ContractedId);
Assert.AreEqual(99, edgeData.Weight);
}
/// <summary>
/// Tries adding or updating an edge and returns #added and #removed edges.
/// </summary>
/// <returns></returns>
public static void TryAddOrUpdateEdge(this DirectedMetaGraph graph, uint vertex1, uint vertex2, float weight, bool?direction, uint contractedId,
out int added, out int removed)
{
var hasExistingEdge = false;
var hasExistingEdgeOnlySameDirection = true;
var edgeCount = 0;
var edgeEnumerator = graph.GetEdgeEnumerator(vertex1);
while (edgeEnumerator.MoveNext())
{
if (edgeEnumerator.Neighbour == vertex2)
{
edgeCount++;
hasExistingEdge = true;
if (ContractedEdgeDataSerializer.HasDirection(edgeEnumerator.Data0, direction))
{ // has the same direction.
if (weight < ContractedEdgeDataSerializer.DeserializeWeight(edgeEnumerator.Data0))
{ // the weight is better, just update.
added = 1;
removed = 1;
return;
}
hasExistingEdgeOnlySameDirection = false;
}
}
}
if (!hasExistingEdge)
{ // no edge exists yet.
added = 1;
removed = 0;
return;
}
else if (hasExistingEdgeOnlySameDirection)
{ // there is an edge already but it has a better weight.
added = 0;
removed = 0;
return;
}
else
{ // see what's there and update if needed.
var forward = false;
var forwardWeight = float.MaxValue;
var forwardContractedId = uint.MaxValue;
var backward = false;
var backwardWeight = float.MaxValue;
var backwardContractedId = uint.MaxValue;
if (direction == null || direction.Value)
{
forward = true;
forwardWeight = weight;
forwardContractedId = contractedId;
}
if (direction == null || !direction.Value)
{
backward = true;
backwardWeight = weight;
backwardContractedId = contractedId;
}
edgeEnumerator = graph.GetEdgeEnumerator(vertex1);
while (edgeEnumerator.MoveNext())
{
if (edgeEnumerator.Neighbour == vertex2)
{
float localWeight;
bool? localDirection;
uint localContractedId;
ContractedEdgeDataSerializer.Deserialize(edgeEnumerator.Data0, edgeEnumerator.MetaData0,
out localWeight, out localDirection, out localContractedId);
if (localDirection == null || localDirection.Value)
{
if (localWeight < forwardWeight)
{
forwardWeight = localWeight;
forward = true;
forwardContractedId = localContractedId;
}
}
if (localDirection == null || !localDirection.Value)
{
if (localWeight < backwardWeight)
{
backwardWeight = localWeight;
backward = true;
backwardContractedId = localContractedId;
}
}
}
}
removed = edgeCount;
added = 0;
if (forward && backward &&
forwardWeight == backwardWeight &&
forwardContractedId == backwardContractedId)
{ // add one bidirectional edge.
added++;
}
else
{ // add two unidirectional edges if needed.
if (forward)
{ // there is a forward edge.
added++;
}
if (backward)
{ // there is a backward edge.
added++;
}
}
}
}
/// <summary>
/// Add or update edge.
/// </summary>
/// <returns></returns>
public static void AddOrUpdateEdge(this DirectedMetaGraph graph, uint vertex1, uint vertex2, float weight,
bool?direction, uint contractedId, float distance, float time)
{
var current = ContractedEdgeDataSerializer.Serialize(weight, direction);
var hasExistingEdge = false;
var hasExistingEdgeOnlySameDirection = true;
if (graph.UpdateEdge(vertex1, vertex2, (data) =>
{
hasExistingEdge = true;
if (ContractedEdgeDataSerializer.HasDirection(data[0], direction))
{ // has the same direction.
if (weight < ContractedEdgeDataSerializer.DeserializeWeight(data[0]))
{ // the weight is better, just update.
return(true);
}
return(false);
}
hasExistingEdgeOnlySameDirection = false;
return(false);
}, new uint[] { current }, ContractedEdgeDataSerializer.SerializeMetaAugmented(contractedId, distance, time)) != Constants.NO_EDGE)
{ // updating the edge succeeded.
return;
}
if (!hasExistingEdge)
{ // no edge exists yet.
graph.AddEdge(vertex1, vertex2, new uint[] { current }, ContractedEdgeDataSerializer.SerializeMetaAugmented(
contractedId, distance, time));
return;
}
else if (hasExistingEdgeOnlySameDirection)
{ // there is an edge already but it has a better weight.
return;
}
else
{ // see what's there and update if needed.
var forward = false;
var forwardWeight = float.MaxValue;
var forwardContractedId = uint.MaxValue;
var forwardTime = float.MaxValue;
var forwardDistance = float.MaxValue;
var backward = false;
var backwardWeight = float.MaxValue;
var backwardContractedId = uint.MaxValue;
var backwardTime = float.MaxValue;
var backwardDistance = float.MaxValue;
if (direction == null || direction.Value)
{
forward = true;
forwardWeight = weight;
forwardContractedId = contractedId;
forwardTime = time;
forwardDistance = distance;
}
if (direction == null || !direction.Value)
{
backward = true;
backwardWeight = weight;
backwardContractedId = contractedId;
backwardTime = time;
backwardDistance = distance;
}
var edgeEnumerator = graph.GetEdgeEnumerator(vertex1);
while (edgeEnumerator.MoveNext())
{
if (edgeEnumerator.Neighbour == vertex2)
{
float localWeight;
bool? localDirection;
ContractedEdgeDataSerializer.Deserialize(edgeEnumerator.Data0,
out localWeight, out localDirection);
uint localContractedId;
float localTime;
float localDistance;
ContractedEdgeDataSerializer.DeserializeMetaAgumented(edgeEnumerator.MetaData, out localContractedId, out localDistance, out localTime);
if (localDirection == null || localDirection.Value)
{
if (localWeight < forwardWeight)
{
forwardWeight = localWeight;
forward = true;
forwardContractedId = localContractedId;
forwardTime = localTime;
forwardDistance = localDistance;
}
}
if (localDirection == null || !localDirection.Value)
{
if (localWeight < backwardWeight)
{
backwardWeight = localWeight;
backward = true;
backwardContractedId = localContractedId;
backwardDistance = localDistance;
backwardTime = localTime;
}
}
}
}
graph.RemoveEdge(vertex1, vertex2);
if (forward && backward &&
forwardWeight == backwardWeight &&
forwardContractedId == backwardContractedId)
{ // add one bidirectional edge.
graph.AddEdge(vertex1, vertex2, forwardWeight, null, forwardContractedId, forwardDistance, forwardTime);
//graph.AddEdge(vertex1, vertex2,
// ContractedEdgeDataSerializer.Serialize(forwardWeight, null), forwardContractedId);
}
else
{ // add two unidirectional edges if needed.
if (forward)
{ // there is a forward edge.
graph.AddEdge(vertex1, vertex2, forwardWeight, true, forwardContractedId, forwardDistance, forwardTime);
//graph.AddEdge(vertex1, vertex2,
// ContractedEdgeDataSerializer.Serialize(forwardWeight, true), forwardContractedId);
}
if (backward)
{ // there is a backward edge.
graph.AddEdge(vertex1, vertex2, backwardWeight, false, backwardContractedId, backwardDistance, backwardTime);
}
}
}
}
private BitArray32 _contractedFlags; // contains flags for contracted vertices.
/// <summary>
/// Excutes the actual run.
/// </summary>
protected override void DoRun()
{
_queue = new BinaryHeap <uint>((uint)_graph.VertexCount);
_contractedFlags = new BitArray32(_graph.VertexCount);
_missesQueue = new Queue <bool>();
// remove all edges that have witness paths, meaning longer than the shortest path
// between the two ending vertices.
this.RemoveWitnessedEdges();
// build queue.
this.CalculateQueue();
var next = this.SelectNext();
var latestProgress = 0f;
var current = 0;
var total = _graph.VertexCount;
while (next != null)
{
// contract...
this.Contract(next.Value);
// ... and select next.
next = this.SelectNext();
// calculate and log progress.
var progress = (float)(System.Math.Floor(((double)current / (double)total) * 10000) / 100.0);
if (progress < 99)
{
progress = (float)(System.Math.Floor(((double)current / (double)total) * 100) / 1.0);
}
if (progress != latestProgress)
{
latestProgress = progress;
int totaEdges = 0;
int totalUncontracted = 0;
int maxCardinality = 0;
var neighbourCount = new Dictionary <uint, int>();
for (uint v = 0; v < _graph.VertexCount; v++)
{
if (!_contractedFlags[v])
{
neighbourCount.Clear();
var edges = _graph.GetEdgeEnumerator(v);
if (edges != null)
{
var edgesCount = edges.Count;
totaEdges = edgesCount + totaEdges;
if (maxCardinality < edgesCount)
{
maxCardinality = edgesCount;
}
}
totalUncontracted++;
}
}
var density = (double)totaEdges / (double)totalUncontracted;
_logger.Log(TraceEventType.Information, "Preprocessing... {0}% [{1}/{2}] {3}q #{4} max {5}",
progress, current, total, _queue.Count, density, maxCardinality);
}
current++;
}
}
public void TestDoubleContractionOneway()
{
// build graph.
var graph = new DirectedMetaGraph(ContractedEdgeDataSerializer.Size,
ContractedEdgeDataSerializer.MetaSize);
graph.AddEdge(0, 2, 100, true, Constants.NO_VERTEX);
graph.AddEdge(2, 0, 100, false, Constants.NO_VERTEX);
graph.AddEdge(0, 3, 10, false, Constants.NO_VERTEX);
graph.AddEdge(3, 0, 10, true, Constants.NO_VERTEX);
graph.AddEdge(1, 2, 1000, false, Constants.NO_VERTEX);
graph.AddEdge(2, 1, 1000, true, Constants.NO_VERTEX);
graph.AddEdge(1, 3, 10000, true, Constants.NO_VERTEX);
graph.AddEdge(3, 1, 10000, false, Constants.NO_VERTEX);
graph.Compress();
// contract graph.
var priorityCalculator = new EdgeDifferencePriorityCalculator(graph, new DykstraWitnessCalculator(int.MaxValue));
priorityCalculator.ContractedFactor = 0;
priorityCalculator.DepthFactor = 0;
var hierarchyBuilder = new HierarchyBuilder(graph, priorityCalculator,
new DykstraWitnessCalculator(int.MaxValue));
hierarchyBuilder.Run();
// check edges.
var edge = graph.GetEdgeEnumerator(0).FirstOrDefault(x => x.Neighbour == 2);
Assert.IsNotNull(edge);
var edgeData = ContractedEdgeDataSerializer.Deserialize(edge.Data[0], edge.MetaData[0]);
Assert.AreEqual(100, edgeData.Weight);
Assert.AreEqual(true, edgeData.Direction);
Assert.AreEqual(Constants.NO_VERTEX, edgeData.ContractedId);
edge = graph.GetEdgeEnumerator(2).FirstOrDefault(x => x.Neighbour == 0);
Assert.IsNull(edge);
edge = graph.GetEdgeEnumerator(0).FirstOrDefault(x => x.Neighbour == 3);
Assert.IsNotNull(edge);
edgeData = ContractedEdgeDataSerializer.Deserialize(edge.Data[0], edge.MetaData[0]);
Assert.AreEqual(10, edgeData.Weight);
Assert.AreEqual(false, edgeData.Direction);
Assert.AreEqual(Constants.NO_VERTEX, edgeData.ContractedId);
edge = graph.GetEdgeEnumerator(3).FirstOrDefault(x => x.Neighbour == 0);
Assert.IsNull(edge);
edge = graph.GetEdgeEnumerator(2).FirstOrDefault(x => x.Neighbour == 3);
Assert.IsNotNull(edge);
edgeData = ContractedEdgeDataSerializer.Deserialize(edge.Data[0], edge.MetaData[0]);
Assert.AreEqual(110, edgeData.Weight);
Assert.AreEqual(false, edgeData.Direction);
Assert.AreEqual(0, edgeData.ContractedId);
edge = graph.GetEdgeEnumerator(3).FirstOrDefault(x => x.Neighbour == 2);
Assert.IsNull(edge);
edge = graph.GetEdgeEnumerator(2).FirstOrDefault(x => x.Neighbour == 1);
Assert.IsNotNull(edge);
edgeData = ContractedEdgeDataSerializer.Deserialize(edge.Data[0], edge.MetaData[0]);
Assert.AreEqual(1000, edgeData.Weight);
Assert.AreEqual(true, edgeData.Direction);
Assert.AreEqual(Constants.NO_VERTEX, edgeData.ContractedId);
edge = graph.GetEdgeEnumerator(1).FirstOrDefault(x => x.Neighbour == 2);
Assert.IsNull(edge);
edge = graph.GetEdgeEnumerator(3).FirstOrDefault(x => x.Neighbour == 1 &&
ContractedEdgeDataSerializer.Deserialize(x.Data[0], x.MetaData[0]).Direction == true);
Assert.IsNotNull(edge);
edgeData = ContractedEdgeDataSerializer.Deserialize(edge.Data[0], edge.MetaData[0]);
Assert.AreEqual(1110, edgeData.Weight);
Assert.AreEqual(2, edgeData.ContractedId);
edge = graph.GetEdgeEnumerator(3).FirstOrDefault(x => x.Neighbour == 1 &&
ContractedEdgeDataSerializer.Deserialize(x.Data[0], x.MetaData[0]).Direction == false);
Assert.IsNotNull(edge);
edgeData = ContractedEdgeDataSerializer.Deserialize(edge.Data[0], edge.MetaData[0]);
Assert.AreEqual(10000, edgeData.Weight);
Assert.AreEqual(Constants.NO_VERTEX, edgeData.ContractedId);
edge = graph.GetEdgeEnumerator(1).FirstOrDefault(x => x.Neighbour == 3);
Assert.IsNull(edge);
}
public void TestPentagonAugmented()
{
// build graph.
var graph = new DirectedMetaGraph(ContractedEdgeDataSerializer.Size,
ContractedEdgeDataSerializer.DynamicAugmentedFixedSize);
graph.AddEdge(0, 1, 100, null, Constants.NO_VERTEX, 50, 1000);
graph.AddEdge(1, 0, 100, null, Constants.NO_VERTEX, 50, 1000);
graph.AddEdge(1, 2, 100, null, Constants.NO_VERTEX, 50, 1000);
graph.AddEdge(2, 1, 100, null, Constants.NO_VERTEX, 50, 1000);
graph.AddEdge(2, 3, 100, null, Constants.NO_VERTEX, 50, 1000);
graph.AddEdge(3, 2, 100, null, Constants.NO_VERTEX, 50, 1000);
graph.AddEdge(3, 4, 100, null, Constants.NO_VERTEX, 50, 1000);
graph.AddEdge(4, 3, 100, null, Constants.NO_VERTEX, 50, 1000);
graph.AddEdge(4, 0, 100, null, Constants.NO_VERTEX, 50, 1000);
graph.AddEdge(0, 4, 100, null, Constants.NO_VERTEX, 50, 1000);
graph.Compress();
// contract graph.
var priorityCalculator = new EdgeDifferencePriorityCalculator(graph, new DykstraWitnessCalculator(int.MaxValue));
priorityCalculator.ContractedFactor = 0;
priorityCalculator.DepthFactor = 0;
var hierarchyBuilder = new HierarchyBuilder <Weight>(graph, priorityCalculator,
new DykstraWitnessCalculator(int.MaxValue), new WeightHandler(null));
hierarchyBuilder.Run();
// check edges.
var edges01 = graph.GetEdgeEnumerator(0).FirstOrDefault(x => x.Neighbour == 1);
Assert.IsNotNull(edges01);
var edges10 = graph.GetEdgeEnumerator(1).FirstOrDefault(x => x.Neighbour == 0);
Assert.IsNull(edges10);
var edges12 = graph.GetEdgeEnumerator(1).FirstOrDefault(x => x.Neighbour == 2);
Assert.IsNull(edges12);
var edges21 = graph.GetEdgeEnumerator(2).FirstOrDefault(x => x.Neighbour == 1);
Assert.IsNotNull(edges21);
var edges23 = graph.GetEdgeEnumerator(2).FirstOrDefault(x => x.Neighbour == 3);
Assert.IsNotNull(edges23);
var edges32 = graph.GetEdgeEnumerator(3).FirstOrDefault(x => x.Neighbour == 2);
Assert.IsNull(edges32);
var edges34 = graph.GetEdgeEnumerator(3).FirstOrDefault(x => x.Neighbour == 4);
Assert.IsNull(edges34);
var edges43 = graph.GetEdgeEnumerator(4).FirstOrDefault(x => x.Neighbour == 3);
Assert.IsNotNull(edges43);
var edges40 = graph.GetEdgeEnumerator(4).FirstOrDefault(x => x.Neighbour == 0);
Assert.IsNull(edges40);
var edges04 = graph.GetEdgeEnumerator(0).FirstOrDefault(x => x.Neighbour == 4);
Assert.IsNotNull(edges04);
var edges41 = graph.GetEdgeEnumerator(4).FirstOrDefault(x => x.Neighbour == 1);
Assert.IsNotNull(edges41);
var edges14 = graph.GetEdgeEnumerator(1).FirstOrDefault(x => x.Neighbour == 4);
Assert.IsNull(edges14);
var edges31 = graph.GetEdgeEnumerator(3).FirstOrDefault(x => x.Neighbour == 1);
Assert.IsNotNull(edges31);
var edges13 = graph.GetEdgeEnumerator(1).FirstOrDefault(x => x.Neighbour == 3);
Assert.IsNull(edges13);
}
public static void TryAddOrUpdateEdge(this DirectedMetaGraph graph, uint vertex1, uint vertex2, float weight, bool?direction, uint contractedId, out int added, out int removed)
{
bool flag1 = false;
bool flag2 = true;
int num1 = 0;
DirectedMetaGraph.EdgeEnumerator edgeEnumerator1 = graph.GetEdgeEnumerator(vertex1);
while (edgeEnumerator1.MoveNext())
{
if ((int)edgeEnumerator1.Neighbour == (int)vertex2)
{
++num1;
flag1 = true;
if (ContractedEdgeDataSerializer.HasDirection(edgeEnumerator1.Data0, direction))
{
if ((double)weight < (double)ContractedEdgeDataSerializer.DeserializeWeight(edgeEnumerator1.Data0))
{
added = 1;
removed = 1;
return;
}
flag2 = false;
}
}
}
if (!flag1)
{
added = 1;
removed = 0;
}
else if (flag2)
{
added = 0;
removed = 0;
}
else
{
bool flag3 = false;
float num2 = float.MaxValue;
uint num3 = uint.MaxValue;
bool flag4 = false;
float num4 = float.MaxValue;
uint num5 = uint.MaxValue;
if (!direction.HasValue || direction.Value)
{
flag3 = true;
num2 = weight;
num3 = contractedId;
}
if (!direction.HasValue || !direction.Value)
{
flag4 = true;
num4 = weight;
num5 = contractedId;
}
DirectedMetaGraph.EdgeEnumerator edgeEnumerator2 = graph.GetEdgeEnumerator(vertex1);
while (edgeEnumerator2.MoveNext())
{
if ((int)edgeEnumerator2.Neighbour == (int)vertex2)
{
float weight1;
bool? direction1;
uint contractedId1;
ContractedEdgeDataSerializer.Deserialize(edgeEnumerator2.Data0, edgeEnumerator2.MetaData0, out weight1, out direction1, out contractedId1);
if ((!direction1.HasValue || direction1.Value) && (double)weight1 < (double)num2)
{
num2 = weight1;
flag3 = true;
num3 = contractedId1;
}
if ((!direction1.HasValue || !direction1.Value) && (double)weight1 < (double)num4)
{
num4 = weight1;
flag4 = true;
num5 = contractedId1;
}
}
}
removed = num1;
added = 0;
if (flag3 & flag4 && (double)num2 == (double)num4 && (int)num3 == (int)num5)
{
added = added + 1;
}
else
{
if (flag3)
{
added = added + 1;
}
if (!flag4)
{
return;
}
added = added + 1;
}
}
}
public static void AddOrUpdateEdge(this DirectedMetaGraph graph, uint vertex1, uint vertex2, float weight, bool?direction, uint contractedId)
{
uint data1 = ContractedEdgeDataSerializer.Serialize(weight, direction);
bool hasExistingEdge = false;
bool hasExistingEdgeOnlySameDirection = true;
if ((int)graph.UpdateEdge(vertex1, vertex2, (Func <uint[], bool>)(data =>
{
hasExistingEdge = true;
if (ContractedEdgeDataSerializer.HasDirection(data[0], direction))
{
return((double)weight < (double)ContractedEdgeDataSerializer.DeserializeWeight(data[0]));
}
hasExistingEdgeOnlySameDirection = false;
return(false);
}), new uint[1] {
data1
}, contractedId) != -1)
{
return;
}
if (!hasExistingEdge)
{
int num1 = (int)graph.AddEdge(vertex1, vertex2, data1, contractedId);
}
else
{
if (hasExistingEdgeOnlySameDirection)
{
return;
}
bool flag1 = false;
float weight1 = float.MaxValue;
uint metaData1 = uint.MaxValue;
bool flag2 = false;
float weight2 = float.MaxValue;
uint metaData2 = uint.MaxValue;
if (!direction.HasValue || direction.Value)
{
flag1 = true;
weight1 = weight;
metaData1 = contractedId;
}
if (!direction.HasValue || !direction.Value)
{
flag2 = true;
weight2 = weight;
metaData2 = contractedId;
}
DirectedMetaGraph.EdgeEnumerator edgeEnumerator = graph.GetEdgeEnumerator(vertex1);
while (edgeEnumerator.MoveNext())
{
if ((int)edgeEnumerator.Neighbour == (int)vertex2)
{
float weight3;
bool? direction1;
uint contractedId1;
ContractedEdgeDataSerializer.Deserialize(edgeEnumerator.Data0, edgeEnumerator.MetaData0, out weight3, out direction1, out contractedId1);
if ((!direction1.HasValue || direction1.Value) && (double)weight3 < (double)weight1)
{
weight1 = weight3;
flag1 = true;
metaData1 = contractedId1;
}
if ((!direction1.HasValue || !direction1.Value) && (double)weight3 < (double)weight2)
{
weight2 = weight3;
flag2 = true;
metaData2 = contractedId1;
}
}
}
graph.RemoveEdge(vertex1, vertex2);
if (flag1 & flag2 && (double)weight1 == (double)weight2 && (int)metaData1 == (int)metaData2)
{
int num2 = (int)graph.AddEdge(vertex1, vertex2, ContractedEdgeDataSerializer.Serialize(weight1, new bool?()), metaData1);
}
else
{
if (flag1)
{
int num3 = (int)graph.AddEdge(vertex1, vertex2, ContractedEdgeDataSerializer.Serialize(weight1, new bool?(true)), metaData1);
}
if (!flag2)
{
return;
}
int num4 = (int)graph.AddEdge(vertex1, vertex2, ContractedEdgeDataSerializer.Serialize(weight2, new bool?(false)), metaData2);
}
}
}
public void TestPentagonDirected()
{
// build graph.
var graph = new DirectedMetaGraph(ContractedEdgeDataSerializer.Size,
ContractedEdgeDataSerializer.MetaSize);
graph.AddEdge(0, 1, 100, true, Constants.NO_VERTEX);
graph.AddEdge(1, 0, 100, false, Constants.NO_VERTEX);
graph.AddEdge(1, 2, 100, true, Constants.NO_VERTEX);
graph.AddEdge(2, 1, 100, false, Constants.NO_VERTEX);
graph.AddEdge(2, 3, 100, true, Constants.NO_VERTEX);
graph.AddEdge(3, 2, 100, false, Constants.NO_VERTEX);
graph.AddEdge(3, 4, 100, true, Constants.NO_VERTEX);
graph.AddEdge(4, 3, 100, false, Constants.NO_VERTEX);
graph.AddEdge(4, 0, 100, true, Constants.NO_VERTEX);
graph.AddEdge(0, 4, 100, false, Constants.NO_VERTEX);
graph.Compress();
// contract graph.
var hierarchyBuilder = new Itinero.Algorithms.Contracted.Dual.HierarchyBuilder(graph,
new DykstraWitnessCalculator(graph.Graph, int.MaxValue));
hierarchyBuilder.ContractedFactor = 0;
hierarchyBuilder.DepthFactor = 0;
hierarchyBuilder.Run();
// check edges.
var edges01 = graph.GetEdgeEnumerator(0).FirstOrDefault(x => x.Neighbour == 1);
Assert.IsNotNull(edges01);
var edges10 = graph.GetEdgeEnumerator(1).FirstOrDefault(x => x.Neighbour == 0);
Assert.IsNull(edges10);
var edges12 = graph.GetEdgeEnumerator(1).FirstOrDefault(x => x.Neighbour == 2);
Assert.IsNull(edges12);
var edges21 = graph.GetEdgeEnumerator(2).FirstOrDefault(x => x.Neighbour == 1);
Assert.IsNotNull(edges21);
var edges23 = graph.GetEdgeEnumerator(2).FirstOrDefault(x => x.Neighbour == 3);
Assert.IsNotNull(edges23);
var edges32 = graph.GetEdgeEnumerator(3).FirstOrDefault(x => x.Neighbour == 2);
Assert.IsNull(edges32);
var edges34 = graph.GetEdgeEnumerator(3).FirstOrDefault(x => x.Neighbour == 4);
Assert.IsNull(edges34);
var edges43 = graph.GetEdgeEnumerator(4).FirstOrDefault(x => x.Neighbour == 3);
Assert.IsNotNull(edges43);
var edges40 = graph.GetEdgeEnumerator(4).FirstOrDefault(x => x.Neighbour == 0);
Assert.IsNull(edges40);
var edges04 = graph.GetEdgeEnumerator(0).FirstOrDefault(x => x.Neighbour == 4);
Assert.IsNotNull(edges04);
var edges41 = graph.GetEdgeEnumerator(4).FirstOrDefault(x => x.Neighbour == 1);
Assert.IsNotNull(edges41);
var edges14 = graph.GetEdgeEnumerator(1).FirstOrDefault(x => x.Neighbour == 4);
Assert.IsNull(edges14);
var edges31 = graph.GetEdgeEnumerator(3).FirstOrDefault(x => x.Neighbour == 1);
Assert.IsNotNull(edges31);
var edges13 = graph.GetEdgeEnumerator(1).FirstOrDefault(x => x.Neighbour == 3);
Assert.IsNull(edges13);
}
