/// <summary>
/// Конструктор
/// </summary>
/// <param name="vertex">Вершина</param>
public GraphVertexInfo(GraphVertex vertex)
{
Vertex = vertex;
IsUnvisited = true;
EdgesWeightSum = int.MaxValue;
PreviousVertex = null;
}
/// <summary>
/// Получение информации о вершине графа
/// </summary>
/// <param name="v">Вершина</param>
/// <returns>Информация о вершине</returns>
GraphVertexInfo GetVertexInfo(GraphVertex v)
{
foreach (var i in infos)
{
if (i.Vertex.Equals(v))
{
return(i);
}
}
return(null);
}
/// <summary>
/// Формирование пути
/// </summary>
/// <param name="startVertex">Начальная вершина</param>
/// <param name="endVertex">Конечная вершина</param>
/// <returns>Путь</returns>
int GetPath(GraphVertex startVertex, GraphVertex endVertex)
{
if (startVertex == null || endVertex == null)
{
return(-1);
}
var path = 0;
while (startVertex != endVertex)
{
endVertex = GetVertexInfo(endVertex).PreviousVertex;
path++;
}
return(path);
}
/// <summary>
/// Поиск кратчайшего пути по вершинам
/// </summary>
/// <param name="startVertex">Стартовая вершина</param>
/// <param name="finishVertex">Финишная вершина</param>
/// <returns>Кратчайший путь</returns>
public int FindShortestPath(GraphVertex startVertex, GraphVertex finishVertex)
{
InitInfo();
var first = GetVertexInfo(startVertex);
first.EdgesWeightSum = 0;
while (true)
{
var current = FindUnvisitedVertexWithMinSum();
if (current == null)
{
break;
}
SetSumToNextVertex(current);
}
return(GetPath(startVertex, finishVertex));
}
/// <summary>
/// Конструктор
/// </summary>
/// <param name="connectedVertex">Связанная вершина</param>
/// <param name="weight">Вес ребра</param>
public GraphEdge(GraphVertex connectedVertex, int weight)
{
ConnectedVertex = connectedVertex;
EdgeWeight = weight;
}
/// <summary>
/// Добавить ребро
/// </summary>
/// <param name="vertex">Вершина</param>
/// <param name="edgeWeight">Вес</param>
public void AddEdge(GraphVertex vertex, int edgeWeight)
{
AddEdge(new GraphEdge(vertex, edgeWeight));
}