private void StrongConnect(Vertex v)
{
v.LowIndex = v.Index = ++_currentIndex;
v.InStack = true;
_vertexStack.Push(v);
foreach (var w in v.LinkedTo) {
if (w.Index == 0) {
StrongConnect(w);
v.LowIndex = Math.Min(v.LowIndex, w.LowIndex);
} else if (w.InStack)
v.LowIndex = Math.Min(v.LowIndex, w.Index);
}//foreach
// If v is a root node, pop the stack and generate the SCC
if (v.LowIndex == v.Index) {
//Pop all vertexes until v - this is a new SCC group
SccCount++;
var nonTrivialGroup = _vertexStack.Peek() != v;
while (true) {
var w = _vertexStack.Pop();
w.InStack = false;
w.SccIndex = SccCount;
w.NonTrivialGroup = nonTrivialGroup;
if (w == v) break; //from while
}
} //if v.LowIndex...
}
public Vertex Add(object tag)
{
var v = new Vertex() { Tag = tag };
Vertexes.Add(v);
return v;
}