private void ReportCycle(TNode node, AbstractDiGraph <TNode> graph)
{
var cycle = new GraphPath <TNode>();
_allcycles.Add(cycle);
cycle.SourceNode = node;
cycle.DestinationNode = node;
cycle.Path = new List <TNode>();
List <TNode> stacklist = _vStack.ToList();
int i = 0;
while (!stacklist[i].Equals(node))
{
i++;
}
for (; i >= 0; i--)
{
cycle.Path.Add(stacklist[i]);
}
cycle.Path.Add(node);
cycle.PathWeight = 0;
for (int j = 1; j < cycle.Path.Count; j++)
{
cycle.PathWeight += graph.GetEdgeWeight(cycle.Path[j - 1], cycle.Path[j]);
}
}
private void Reportpath(TNode node, TNode dnode, AbstractDiGraph <TNode> graph)
{
var path = new GraphPath <TNode>();
_allpaths.Add(path);
path.SourceNode = node;
path.DestinationNode = dnode;
path.Path = new List <TNode>();
List <TNode> stacklist = _vStack.ToList();
int i = 0;
while (!stacklist[i].Equals(node))
{
i++;
}
for (; i >= 0; i--)
{
path.Path.Add(stacklist[i]);
}
path.Path.Add(dnode);
path.PathWeight = 0;
for (int j = 1; j < path.Path.Count; j++)
{
path.PathWeight += graph.GetEdgeWeight(path.Path[j - 1], path.Path[j]);
}
}
public List <AbstractGraphPath <TNode> > FindCycles(List <DepthFirstSearchEdge <TNode> > depthFirstSearchEdges,
TNode sourceVertex, int maxStops)
{
var cycles = new List <AbstractGraphPath <TNode> >();
foreach (
var allDFSBackEdges in depthFirstSearchEdges.Where(x => x.EdgeType == DepthFirstSearchEdgeType.BackEdge)
)
{
var sourceNode = allDFSBackEdges.DestinationNode;
foreach (
var backEdge in
depthFirstSearchEdges.Where(
x => x.EdgeType == DepthFirstSearchEdgeType.BackEdge && x.DestinationNode.Equals(sourceNode))
)
{
var cycle = new GraphPath <TNode>()
{
SourceNode = sourceNode, DestinationNode = sourceNode
};
cycle.Path = new List <TNode>()
{
sourceNode
};
cycle.PathWeight = 0;
var treeEdges = depthFirstSearchEdges.Where(x => x.EdgeType == DepthFirstSearchEdgeType.TreeEdge);
var treeEdge = treeEdges.Single(x => x.SourceNode.Equals(sourceNode));
int nodeCounter = 2;
while (!treeEdge.DestinationNode.Equals(backEdge.SourceNode) &&
!IsMaxNodeLimitReached(maxStops, nodeCounter))
{
cycle.PathWeight += treeEdge.EdgeWeight;
cycle.Path.Add(treeEdge.DestinationNode)
;
treeEdge = treeEdges.Single(x => x.SourceNode.Equals(treeEdge.DestinationNode));
}
cycle.Path.Add(backEdge.SourceNode);
cycle.Path.Add(backEdge.DestinationNode);
cycle.PathWeight += backEdge.EdgeWeight;
if (!IsMaxNodeLimitReached(maxStops, nodeCounter))
{
cycles.Add(cycle);
}
}
}
return(cycles);
}
private void Initialise(AbstractDiGraph <TNode> graph, TNode sourceNode)
{
foreach (var node in graph.AllNodes.Where(x => !x.Equals(sourceNode)))
{
var shortestPathNode = new GraphPath <TNode>();
shortestPathNode.DestinationNode = node;
shortestPathNode.PathWeight = Infinity;
shortestPathNode.SourceNode = sourceNode;
_estimatedDistances.Add(node, shortestPathNode);
_shortestPathUnKnownNodesQueue.Add(shortestPathNode);
}
//Source Node Initialise
_estimatedDistances.Add(sourceNode,
new GraphPath <TNode>()
{
DestinationNode = sourceNode, SourceNode = sourceNode
});
_estimatedDistances[sourceNode].PathWeight = 0;
_shortestPathKnownNodes.Add(sourceNode);
}