/// <summary>
/// Find unvisited vertex with minimal weight sum
/// </summary>
/// <returns>Vertex info</returns>
public GraphVertexInfo FindUnvisitedVertexWithMinSum()
{
var minValue = int.MaxValue;
GraphVertexInfo minVertexInfo = null;
foreach (var i in InfoList)
{
if (i.IsUnvisited && i.EdgesWeightSum < minValue)
{
minVertexInfo = i;
minValue = i.EdgesWeightSum;
}
}
return(minVertexInfo);
}
/// <summary>
/// Calculate edge weight sum for the next vertex
/// </summary>
/// <param name="info">Current vertex info</param>
/// <param name="searchingField">Field of edge to search the shortest path by</param>
private void SetSumToNextVertex(GraphVertexInfo info, PathSearchingField searchingField = PathSearchingField.Weight)
{
info.IsUnvisited = false;
foreach (var e in info.Vertex.Edges)
{
var nextInfo = GetVertexInfo(e.ConnectedVertex);
var sum = info.EdgesWeightSum;
switch (searchingField)
{
case PathSearchingField.Weight: { sum += e.EdgeWeight; break; }
case PathSearchingField.Length: { sum += e.EdgeLength; break; }
}
if (sum < nextInfo.EdgesWeightSum)
{
nextInfo.EdgesWeightSum = sum;
nextInfo.PreviousVertex = info.Vertex;
}
}
}
