public DijResult GetDirResult(Node startNode, Node endNode, Graph graph)
{
var result = new DijResult();
var routes = result.Routes = new List <Route>();
Node tempStartNode = null;
Node tempEndNode = endNode;
while (tempStartNode != startNode)
{
//var row = this[endNode]
tempStartNode = this[tempEndNode].PreviousVertex;
var route = graph.GetLink(tempStartNode, tempEndNode);
routes.Add(new Route(from: tempStartNode, to: tempEndNode, distance: route.Distance));
tempEndNode = tempStartNode;
}
routes.Reverse();
return(result);
}
public DijResult Dij(string from, string to)
{
var startNode = this[from];
var endNode = this[to];
List <Node> visitedNodes = new List <Node>();
List <Node> unvisitedNodes = new List <Node>(this.Nodes);
var shortestDistancesFromStartNode = new ShortestPathsTable();
unvisitedNodes.ForEach((unvisitedNode) =>
{
if (unvisitedNode == startNode)
{
shortestDistancesFromStartNode.Add(unvisitedNode, new ShortestPathsTableRow(0, startNode));
}
else
{
shortestDistancesFromStartNode.Add(unvisitedNode, new ShortestPathsTableRow(double.MaxValue, null));
}
});
var visitingNode = startNode;
var routes = RoutesContainGivenNode(startNode);
routes.ForEach((route) =>
{
var otherNode = route.OtherNode(visitingNode);
var tableRow = shortestDistancesFromStartNode[otherNode];
var oldDistance = tableRow.ShortestDistance;
var newDistance = route.Distance;
if (newDistance < oldDistance)
{
tableRow.ShortestDistance = newDistance;
tableRow.PreviousVertex = visitingNode;
}
});
unvisitedNodes.Remove(visitingNode);
visitedNodes.Add(visitingNode);
while (unvisitedNodes.Count != 0)
{
var min = double.MaxValue;
Node closestNodeUnvisited = null;
unvisitedNodes.ForEach((node) =>
{
var current = shortestDistancesFromStartNode[node].ShortestDistance;
if (current < min)
{
min = current;
closestNodeUnvisited = node;
}
});
visitingNode = closestNodeUnvisited;
var routesInLoop = RoutesContainGivenNode(visitingNode, visitedNodes);
routesInLoop.ForEach((route) =>
{
var otherNode = route.OtherNode(visitingNode);
var tableRow = shortestDistancesFromStartNode[otherNode];
var oldDistance = tableRow.ShortestDistance;
var newDistance = route.Distance + shortestDistancesFromStartNode[visitingNode].ShortestDistance;
if (newDistance < oldDistance)
{
tableRow.ShortestDistance = newDistance;
tableRow.PreviousVertex = visitingNode;
}
;
});
unvisitedNodes.Remove(visitingNode);
visitedNodes.Add(visitingNode);
;
}
var dijResult = new DijResult();
var dijResultRoutes = dijResult.Routes;
var routeQuene = new Queue <Route>();
var result = shortestDistancesFromStartNode.GetDirResult(startNode: startNode, endNode: endNode, graph: this);
result.Graph = this;
return(result);
}
