public bool PrimaSMSTAlgorithm()
{
VisitedNodes.Add(InnerGraph.SetOfNodes[0]);
for (; VisitedNodes.Count < InnerGraph.QuantityOfNodes;)
{
Node Start = new Node();
Node Finish = new Node();
// maybe throw infinity to group of special onjects and instruments fo algorithm
Edge CurrentEdge = new Edge {
Weight = double.PositiveInfinity
};
for (int Index = 0; Index < InnerGraph.QuantityOfNodes; Index++)
{
if (VisitedNodes.Contains(InnerGraph.SetOfNodes[Index]))
{
foreach (Node Incomer in InnerGraph.SetOfNodes[Index].Incomers.Where(Node => Node != null &&
!VisitedNodes.Contains(Node)))
{
if (CurrentEdge.Weight > InnerGraph.FindEdge(InnerGraph.SetOfNodes[Index], Incomer).Weight)
{
CurrentEdge = InnerGraph.FindEdge(InnerGraph.SetOfNodes[Index], Incomer);
Start = CurrentEdge[0];
Finish = CurrentEdge[1];
}
}
}
}
VisitedNodes.Add(Finish);
MinimumSpanningTree.Add(InnerGraph.FindEdge(Start, Finish));
}
return(VisitedNodes.Count.Equals(InnerGraph.QuantityOfNodes));
}
public bool FordFulkersonBFSTypeAlgorithm(Node Start, Node Target)
{
if (Start.Equals(Target))
{
CapacityOfFlow = 0.0;
return(true);
}
Node CurrentNode = new Node();
for (; BreadthFirstSearch.BreadthFirstSearch(Start, Target, Path);)
{
double CurrentStreamCapacity = double.PositiveInfinity;
for (int Index = Target.Index; Index != Start.Index; Index = Path[Index].Index)
{
CurrentNode = Path[Index];
if (CurrentStreamCapacity < InnerGraph.FindEdge(CurrentNode, InnerGraph.SetOfNodes[Index]).Weight)
{
CurrentStreamCapacity = InnerGraph.FindEdge(CurrentNode, InnerGraph.SetOfNodes[Index]).Weight;
}
}
for (int Index = Target.Index; Index != Start.Index; Index = Path[Index].Index)
{
InnerGraph.FindEdge(CurrentNode, InnerGraph.SetOfNodes[Index]).Weight -= CurrentStreamCapacity;
InnerGraph.FindEdge(InnerGraph.SetOfNodes[Index], CurrentNode).Weight += CurrentStreamCapacity;
}
CapacityOfFlow += CurrentStreamCapacity;
BreadthFirstSearch = new BreadthFirstSearchAlgorithm(InnerGraph);
}
return(true);
}
public bool FindTheShortestPathes(Node Start)
{
ShortestPathes[Start.Index].Weight = 0;
for (int FirstIndex = 0; FirstIndex < InnerGraph.NumberOfNodes - 1; FirstIndex++)
{
Node CurrentNode = new Node {
Weight = Infinity
};
for (int SecondIndex = 0; SecondIndex < InnerGraph.NumberOfNodes; SecondIndex++)
{
if (!VisitedNodes.Contains(ShortestPathes[SecondIndex]) && ShortestPathes[SecondIndex].Weight <= CurrentNode.Weight)
{
CurrentNode = ShortestPathes[SecondIndex];
Index = ShortestPathes[SecondIndex].Index;
}
}
VisitedNodes.Add(ShortestPathes[Index]);
for (int SecondIndex = 0; SecondIndex < InnerGraph.NumberOfNodes; SecondIndex++)
{
if (!VisitedNodes.Contains(ShortestPathes[SecondIndex]) && InnerGraph.SetOfNodes[Index][SecondIndex] != null && !ShortestPathes[Index].Weight.Equals(Infinity) && ShortestPathes[SecondIndex].Weight > ShortestPathes[Index].Weight + InnerGraph.FindEdge(InnerGraph.SetOfNodes[Index], InnerGraph.SetOfNodes[SecondIndex]).Weight)
{
ShortestPathes[SecondIndex].Weight = ShortestPathes[Index].Weight + InnerGraph.FindEdge(InnerGraph.SetOfNodes[Index], InnerGraph.SetOfNodes[SecondIndex]).Weight;
}
}
}
return(InnerGraph.NegativeCycleChecker(ShortestPathes));
}
public bool BreadthFirstSearch(Node Start)
{
Queue.Enqueue(Start);
VisitedNodes.Add(Start);
for (; Queue.Count > 0;)
{
Start = Queue.Dequeue();
for (int Index = 0; Index < InnerGraph.NumberOfNodes; Index++)
{
if (InnerGraph.SetOfNodes[Start.Index][Index] != null && !VisitedNodes.Contains(InnerGraph.SetOfNodes[Index]))
{
ResultOfSearching.Add(InnerGraph.FindEdge(Start, InnerGraph.SetOfNodes[Index]));
Queue.Enqueue(InnerGraph.SetOfNodes[Index]);
VisitedNodes.Add(InnerGraph.SetOfNodes[Index]);
}
}
}
return(VisitedNodes.Count.Equals(InnerGraph.NumberOfNodes));
}
public bool A_StarAlgorithm(Node Start, Node Target)
{
Node CurrentNode = Start;
ActualNodes.Add(CurrentNode);
for (; ActualNodes.Count > 0;)
{
CurrentNode = ActualNodes[0];
if (CurrentNode.Equals(Target))
{
VisitedNodes.Add(Target);
for (int Index = 0; Index < VisitedNodes.Count - 1; Index++)
{
ShortesPath.Add(InnerGraph.FindEdge(VisitedNodes[Index], VisitedNodes[Index + 1]));
}
return(true);
}
ActualNodes.Remove(CurrentNode);
ClosedNodes.Add(CurrentNode);
foreach (Node Incomer in CurrentNode.Incomers.Where(Node => Node != null && Node.Index != Node.Incomers.Length - 1))
{
if (!ClosedNodes.Contains(Incomer))
{
if (!ActualNodes.Contains(Incomer))
{
Incomer[Incomer.Index] = CurrentNode;
Incomer.HeuristicCost = HeruisticPath(Incomer, Target);
Incomer.PastWayCost = InnerGraph.FindEdge(CurrentNode, Incomer).Weight;
Incomer.TotalPathCost = Incomer.PastWayCost + Incomer.HeuristicCost;
ActualNodes.Add(Incomer);
ActualNodes = ActualNodes.OrderBy(Node => Node.TotalPathCost).ToList <Node>();
}
}
}
VisitedNodes.Add(CurrentNode);
}
return(true);
}
public bool FindTheShortesPath(Node Start, Node Target)
{
Node CurrentNode = Start;
OpenList.Add(CurrentNode);
for (; OpenList.Count > 0;)
{
CurrentNode = OpenList[0];
if (CurrentNode.Equals(Target))
{
VisitedNodes.Add(Target);
for (int Index = 0; Index < VisitedNodes.Count - 1; Index++)
{
ShortesPath.Add(InnerGraph.FindEdge(VisitedNodes[Index], VisitedNodes[Index + 1]));
}
return(true);
}
OpenList.Remove(CurrentNode);
ClosedList.Add(CurrentNode);
foreach (Node Inheritor in CurrentNode.Inheritors.Where(Node => Node != null && Node.Index != Node.Inheritors.Length - 1))
{
if (!ClosedList.Contains(Inheritor))
{
if (!OpenList.Contains(Inheritor))
{
Inheritor[Inheritor.Index] = CurrentNode;
Inheritor.HeuristicPathWeight = CalculateHeuristic(Inheritor, Target);
Inheritor.GainedPathWeight = InnerGraph.FindEdge(CurrentNode, Inheritor).Weight;
Inheritor.TotalPathWeight = Inheritor.GainedPathWeight + Inheritor.HeuristicPathWeight;
OpenList.Add(Inheritor);
OpenList = OpenList.OrderBy(Node => Node.TotalPathWeight).ToList <Node>();
}
}
}
VisitedNodes.Add(CurrentNode);
}
return(true);
}
/// <summary>
/// that type of DFS that start from one Node ( that give as param) and researche all graph </summary>
/// <param name="Start">< Node that our research start>
/// <returns> true if we find all Nodes</returns>
public bool DepthFirstSearch(Node Start)
{
VisitedNodes.Add(Start);
for (int Index = 0; Index < InnerGraph.QuantityOfNodes; Index++)
{
if (InnerGraph.SetOfNodes[Start.Index][Index] != null &&
!VisitedNodes.Contains(InnerGraph.SetOfNodes[Index]))
{
ResultOfSearching.Add(InnerGraph.FindEdge(Start, InnerGraph.SetOfNodes[Index]));
DepthFirstSearch(InnerGraph.SetOfNodes[Index]);
}
}
return(VisitedNodes.Count.Equals(InnerGraph.QuantityOfNodes));
}
public bool FindTheShortestPathes(Node Start)
{
ShortestPathes[Start.Index].Weight = 0;
for (int FirstIndex = 1; FirstIndex < InnerGraph.NumberOfNodes - 1; FirstIndex++)
{
for (int SecondIndex = 0; SecondIndex < InnerGraph.NumberOfEdges; SecondIndex++)
{
ShortestPathes[InnerGraph.SetOfEdges[SecondIndex][1].Index].Weight = Min(ShortestPathes[InnerGraph.SetOfEdges[SecondIndex][1].Index].Weight, ShortestPathes[InnerGraph.SetOfEdges[SecondIndex][0].Index].Weight + InnerGraph.SetOfEdges[SecondIndex].Weight);
}
}
return(InnerGraph.NegativeCycleChecker(ShortestPathes));
}
public Floyd_WarshallAlgorithm(Graph Graph)
{
InnerGraph = (Graph)Graph.Clone();
MatrixOfTheShortesPathes = new double[Graph.QuantityOfNodes, Graph.QuantityOfNodes];
// Initialise MatrixOfTheShortestPathes
for (int FirstIndex = 0; FirstIndex < InnerGraph.QuantityOfNodes; FirstIndex++)
{
for (int SecondIndex = 0; SecondIndex < InnerGraph.QuantityOfNodes; SecondIndex++)
{
if (InnerGraph.SetOfNodes[FirstIndex][SecondIndex] != null)
{
MatrixOfTheShortesPathes[FirstIndex, SecondIndex] = InnerGraph.FindEdge(InnerGraph.SetOfNodes[FirstIndex], InnerGraph.SetOfNodes[SecondIndex]).Weight;
}
else
{
MatrixOfTheShortesPathes[FirstIndex, SecondIndex] = double.PositiveInfinity;
}
}
}
}
public FloydWarshallAlgorithm(Graph Graph)
{
MatrixOfTheShortesPathes = new double[Graph.NumberOfNodes, Graph.NumberOfNodes];
InnerGraph = (Graph)Graph.Clone();
for (int FirstIndex = 0; FirstIndex < InnerGraph.NumberOfNodes; FirstIndex++)
{
for (int SecondIndex = 0; SecondIndex < InnerGraph.NumberOfNodes; SecondIndex++)
{
if (InnerGraph.SetOfNodes[FirstIndex][SecondIndex] != null)
{
MatrixOfTheShortesPathes[FirstIndex, SecondIndex] = InnerGraph.FindEdge(InnerGraph.SetOfNodes[FirstIndex], InnerGraph.SetOfNodes[SecondIndex]).Weight;
}
else
{
MatrixOfTheShortesPathes[FirstIndex, SecondIndex] = Infinity;
}
}
}
}
/// <summary>
/// that type of DFS that start from one Node ( that give as param) and researche targeted node. </summary>
/// <param name="Start"> first Node in queue</param>
/// <param name="Target"> Scope of our researche</param>
/// <param name="FoundPath"></param>
/// <returns> True if we find target (target in list of visited nodes)</returns>
public bool DepthFirstSearch(Node Start, Node Target, Node[] FoundPath)
{
VisitedNodes.Add(Start);
if (VisitedNodes.Contains(Target))
{
return(true);
}
for (int Index = 0; Index < InnerGraph.QuantityOfNodes; Index++)
{
if (InnerGraph.SetOfNodes[Start.Index][Index] != null &&
!VisitedNodes.Contains(InnerGraph.SetOfNodes[Index]) &&
InnerGraph.FindEdge(Start, InnerGraph.SetOfNodes[Index]).Weight > 0)
{
FoundPath[Index] = Start;
if (DepthFirstSearch(InnerGraph.SetOfNodes[Index], Target, FoundPath))
{
return(true);
}
}
}
return(VisitedNodes.Contains(Target));
}
public bool FindMaximumFlowWithDFSRealization(Node Start, Node Target)
{
if (Start.Equals(Target))
{
CapacityOfFlow = 0.0;
return(true);
}
Node CurrentNode = new Node();
for (; DepthFirstSearch.DepthFirstSearch(Start, Target, FoundPath);)
{
double CurrentStreamCapacity = Infinity;
for (int Index = Target.Index; Index != Start.Index; Index = FoundPath[Index].Index)
{
CurrentNode = FoundPath[Index];
CurrentStreamCapacity = Min(CurrentStreamCapacity, InnerGraph.FindEdge(CurrentNode, InnerGraph.SetOfNodes[Index]).Weight);
}
for (int Index = Target.Index; Index != Start.Index; Index = FoundPath[Index].Index)
{
InnerGraph.FindEdge(CurrentNode, InnerGraph.SetOfNodes[Index]).Weight -= CurrentStreamCapacity;
InnerGraph.FindEdge(InnerGraph.SetOfNodes[Index], CurrentNode).Weight += CurrentStreamCapacity;
}
CapacityOfFlow += CurrentStreamCapacity;
DepthFirstSearch = new DepthFirstSearchAlgorithm(InnerGraph);
}
return(true);
}
public bool DepthFirstSearch(Node Start, Node Target)
{
VisitedNodes.Add(Start);
if (VisitedNodes.Contains(Target))
{
return(true);
}
for (int Index = 0; Index < InnerGraph.NumberOfNodes; Index++)
{
if (InnerGraph.SetOfNodes[Start.Index][Index] != null && !VisitedNodes.Contains(InnerGraph.SetOfNodes[Index]))
{
ResultOfSearching.Add(InnerGraph.FindEdge(Start, InnerGraph.SetOfNodes[Index]));
if (DepthFirstSearch(InnerGraph.SetOfNodes[Index], Target))
{
return(true);
}
}
}
return(VisitedNodes.Contains(Target));
}
///
/// bfs var 2
/// searching path to target node from some start node
///
/// <param name="Start"> - first node
/// <param name="Target"> - our scope
/// <param name="Path"> - for our scope
/// <returns></returns>
public bool BreadthFirstSearch(Node Start, Node Target, Node[] Path)
{
Queue.Enqueue(Start);
VisitedNodes.Add(Start);
Path[Start.Index] = Start;
if (VisitedNodes.Contains(Target))
{
return(true);
}
for (; Queue.Count > 0;)
{
Start = Queue.Dequeue();
for (int Index = 0; Index < InnerGraph.QuantityOfNodes; Index++)
{
if (InnerGraph.SetOfNodes[Start.Index][Index] != null && !VisitedNodes.Contains(InnerGraph.SetOfNodes[Index]) && InnerGraph.FindEdge(Start, InnerGraph.SetOfNodes[Index]).Weight > 0)
{
Path[Index] = Start;
Queue.Enqueue(InnerGraph.SetOfNodes[Index]);
VisitedNodes.Add(InnerGraph.SetOfNodes[Index]);
}
}
}
return(VisitedNodes.Contains(Target));
}
