public void InvalidatePredecessors(Node node)
{
GraphVertex thisVertex = null;
if(m_NodeGraphVertexMap.ContainsKey(node))
thisVertex = m_NodeGraphVertexMap[node];
if (thisVertex == null)
return;
FRList<GraphVertex> ZeroPredecessorVertexList = new FRList<GraphVertex>();
while (true)
{
ZeroPredecessorVertexList.Clear();
foreach (GraphVertex curVertex in m_NodeGraphVertexMap.Values)
{
// Don't invalidate the input node vertex
if (curVertex.Valid() && curVertex != thisVertex &&
curVertex.GetpredecessorCount() == 0)
ZeroPredecessorVertexList.Add(curVertex);
}
// There is no zero degree vertex.
if (ZeroPredecessorVertexList.Count == 0)
break;
foreach (GraphVertex vertex in ZeroPredecessorVertexList)
{
m_TopologySortedNodeList.Add(vertex.GetNode());
// In valid the vertex and edges.
vertex.SetValid(false);
foreach (GraphEdge edge in vertex.GetSuccessorEdges())
{
edge.SetValid(false);
}
}
}
}
public bool TopologySort()
{
m_TopologySortedNodeList.Clear();
FRList<GraphVertex> ZeroPredecessorVertexList = new FRList<GraphVertex>();
while (true)
{
ZeroPredecessorVertexList.Clear();
foreach (GraphVertex curVertex in m_NodeGraphVertexMap.Values)
{
if (curVertex.Valid() && curVertex.GetpredecessorCount() == 0)
ZeroPredecessorVertexList.Add(curVertex);
}
// There is no zero degree vertex.
// 1. Finish all the vertex.
// 2. The left vertex are circles.
if (ZeroPredecessorVertexList.Count == 0)
break;
foreach (GraphVertex vertex in ZeroPredecessorVertexList)
{
m_TopologySortedNodeList.Add(vertex.GetNode());
// In valid the vertex and edges.
vertex.SetValid(false);
foreach (GraphEdge edge in vertex.GetSuccessorEdges())
{
edge.SetValid(false);
}
}
}
// If the sorted vertexes count isn't equal to the graph vertex count, that means there exist circle.
Debug.Assert(m_TopologySortedNodeList.Count == m_NodeGraphVertexMap.Count);
if (m_TopologySortedNodeList.Count != m_NodeGraphVertexMap.Count)
return false;
return true;
}
public void BuildGraph(FRList<Node> nodeList)
{
m_NodeGraphVertexMap.Clear();
m_NodeGraphEdgeList.Clear();
foreach (Node node in nodeList)
{
GraphVertex thisVertex = GetVertex(node);
Constraint cons = node as Constraint;
if (cons != null)
{
FRList<Node> nodes = new FRList<Node>();
cons.GetPredecessor(nodes);
foreach (Node preNode in nodes)
{
GraphVertex preVertex = GetVertex(preNode);
AddEdge(preVertex, thisVertex);
}
nodes.Clear();
cons.GetSuccessor(nodes);
foreach (Node sucNode in nodes)
{
GraphVertex sucVertex = GetVertex(sucNode);
AddEdge(thisVertex, sucVertex);
}
}
}
}
