private void DepthFirstSearch(Node sourceNode)
{
stack.Push(sourceNode);
while (stack.Count != 0)
{
var currentNode = stack.Pop();
if (currentNode.Value ==0)
{
visited.Add(currentNode);
}
if (visited.Contains(currentNode))
{
continue;
}
if (!RegionDictionary.ContainsKey(sourceNode))
{
RegionDictionary[sourceNode] = new HashSet<Node>();
}
RegionDictionary[sourceNode].Add(currentNode);
visited.Add(currentNode);
foreach (var neighborEdge in currentNode.NeighborEdges)
{
stack.Push(neighborEdge.ToNode);
}
}
}
public Node[,] GetNodeMatrix(int[,] valueMatrix)
{
Node[,] nodeMatrix = new Node[_rows, _columns];
for (int ri = 0; ri < _rows; ri++)
{
for (int ci = 0; ci < _columns; ci++)
{
Node node = new Node(valueMatrix[ri, ci]);
nodeMatrix[ri, ci] = node;
}
}
return nodeMatrix;
}
public IEnumerable<Node> Setup3x3Graph()
{
/* Setup Graph like this
1 1 0
1 1 1
1 1 1 */
List<Node> nodes = new List<Node>
{
new Node(1),
new Node(1),
new Node(0),
new Node(1),
new Node(1),
new Node(1),
new Node(1),
new Node(1),
new Node(1),
};
IEnumerable<Node> nodeZeroNeighbors = new Node[] { nodes[1], nodes[3], nodes[4] };
IEnumerable<Node> nodeOneNeighbors = new Node[] { nodes[0], nodes[2], nodes[3], nodes[4], nodes[5] };
IEnumerable<Node> nodeTwoNeighbors = new Node[] { nodes[1], nodes[4], nodes[5] };
IEnumerable<Node> nodeThreeNeighbors = new Node[] { nodes[0], nodes[1], nodes[4], nodes[6], nodes[7] };
IEnumerable<Node> nodeFourNeighbors = new Node[] { nodes[0], nodes[1], nodes[2], nodes[3], nodes[5], nodes[6], nodes[7], nodes[8] };
IEnumerable<Node> nodeFiveNeighbors = new Node[] { nodes[1], nodes[2], nodes[4], nodes[7], nodes[8] };
IEnumerable<Node> nodeSixNeighbors = new Node[] { nodes[3], nodes[4], nodes[7]};
IEnumerable<Node> nodeSevenNeighbors = new Node[] { nodes[3], nodes[4], nodes[5], nodes[6], nodes[8] };
IEnumerable<Node> nodeEightNeighbors = new Node[] { nodes[4], nodes[5], nodes[7] };
nodes[0].ExtendNeighbors(nodeZeroNeighbors);
nodes[1].ExtendNeighbors(nodeOneNeighbors);
nodes[2].ExtendNeighbors(nodeTwoNeighbors);
nodes[3].ExtendNeighbors(nodeThreeNeighbors);
nodes[4].ExtendNeighbors(nodeFourNeighbors);
nodes[5].ExtendNeighbors(nodeFiveNeighbors);
nodes[6].ExtendNeighbors(nodeSixNeighbors);
nodes[7].ExtendNeighbors(nodeSevenNeighbors);
nodes[8].ExtendNeighbors(nodeEightNeighbors);
return nodes;
}
private List<Node> assignNodeNeighbors(Node[,] nodeMatrix)
{
List<Node> nodes = new List<Node>();
for (int ri = 0; ri < _rows; ri++)
{
for (int ci = 0; ci < _columns; ci++)
{
var thisNode = nodeMatrix[ri, ci];
nodes.Add(thisNode);
List<GridIndex> neighborIndices = getNeighborCells(ri, ci);
foreach (var index in neighborIndices)
{
var neigbor = nodeMatrix[index.Row, index.Column];
thisNode.AddNeighbor(neigbor);
}
}
}
return nodes;
}
public Edge(Node fromNode, Node toNode)
{
FromNode = fromNode;
ToNode = toNode;
}
public void AddNeighbor(Node neighborNode)
{
var edge = new Edge(this, neighborNode);
_neighborNodes.Add(edge);
}
public void RemoveNode(Node node)
{
_nodes.Remove(node);
}
public void AddNode(Node node)
{
_nodes.Add(node);
}