/// <summary>
/// Removes witnessed shortcuts.
/// </summary>
/// <param name="shortcuts"></param>
/// <param name="witnesses"></param>
/// <returns></returns>
public static bool RemoveWitnessed <T>(this Shortcuts <T> shortcuts, WeightHandler <T> weightHandler, Dictionary <OriginalEdge, T> witnesses)
where T : struct
{
bool witnessed = false;
foreach (var witness in witnesses)
{
var edge = witness.Key;
if (shortcuts.TryGetValue(edge, out Shortcut <T> shortcut))
{
if (weightHandler.IsSmallerThan(witness.Value, shortcut.Forward))
{
shortcut.Forward = witness.Value;
shortcuts.AddOrUpdate(edge, shortcut, weightHandler);
witnessed = true;
}
}
// TODO: this should be 'else', in theory this extra check isn't needed.
edge = edge.Reverse();
if (shortcuts.TryGetValue(edge, out shortcut))
{
if (weightHandler.IsSmallerThan(witness.Value, shortcut.Backward))
{
shortcut.Backward = witness.Value;
shortcuts.AddOrUpdate(edge, shortcut, weightHandler);
witnessed = true;
}
}
}
return(witnessed);
}
/// <summary>
/// Removes witnessed shortcuts.
/// </summary>
/// <param name="shortcuts"></param>
/// <param name="witnesses"></param>
/// <returns></returns>
public static bool RemoveWitnessed <T>(this Shortcuts <T> shortcuts, WeightHandler <T> weightHandler, uint vertex, Dictionary <uint, Dictionary <OriginalEdge, T> > witnesses)
where T : struct
{
if (witnesses.TryGetValue(vertex, out Dictionary <OriginalEdge, T> vertexWitnesses))
{
return(shortcuts.RemoveWitnessed(weightHandler, vertexWitnesses));
}
return(false);
}
private VertexInfo(Shortcuts <T> shortcuts, int edgesCount, MetaEdge[] edges)
{
_shortcuts = shortcuts;
_edgesCount = edgesCount;
_edges = edges;
}
/// <summary>
/// Creates a new vertex info object.
/// </summary>
public VertexInfo()
{
_shortcuts = new Shortcuts <T>();
_edges = new MetaEdge[64];
}
