public static void farthestInsertion(List<Edge> edgelist, List<node> nodelist, node startnode, Form1 f)
{
Thread thisThread = Thread.CurrentThread;
int count = nodelist.Count();
Edge greatestEdge = edgelist[0];
List<node> markednodes = new List<node>();
List<Edge> Route = new List<Edge>();
f.route = Route;
List<node> nodelistcopy = new List<node>(nodelist);
f.secondThread = thisThread;
f.marked = markednodes;
markednodes.Add(startnode);
nodelist.Remove(startnode);
for (int i = 0; i < edgelist.Count(); i++)
{
if (edgelist[i].FromNode == startnode)
{
greatestEdge = edgelist[i];
break;
}
}
for (int i = 0; i < edgelist.Count(); i++)
{
if (edgelist[i].FromNode == startnode)
{
if (edgelist[i].distance > greatestEdge.distance)
greatestEdge = edgelist[i];
}
}
Route.Add(greatestEdge);
Route.Add(new Edge(greatestEdge.ToNode, greatestEdge.FromNode));
markednodes.Add(greatestEdge.ToNode);
nodelist.Remove(greatestEdge.ToNode);
f.Invoke(f.addPanelDelegate);
Edge NodetoEdgeStart;
Edge NodetoEdgeEnd;
Edge NodetoEdge2Start;
Edge NodetoEdge2End;
foreach (node item in nodelist)
{
NodetoEdgeStart = edgelist.Find(i => ((i.ToNode == item) && (i.FromNode == startnode)));
float CrossProduct = Math.Abs((greatestEdge.xdif * NodetoEdgeStart.ydif) - (greatestEdge.ydif * NodetoEdgeStart.xdif));
item.ClosestEdgeDist = CrossProduct / greatestEdge.distance;
item.ClosestEdge = greatestEdge;
}
node closestnode = nodelist[0];
foreach (node item in nodelist)
{
if (item.ClosestEdgeDist < closestnode.ClosestEdgeDist)
{
closestnode = item;
}
}
markednodes.Add(closestnode);
nodelist.Remove(closestnode);
Route.Remove(Route[0]);
Route.Insert(0, new Edge(closestnode, greatestEdge.ToNode));
Route.Insert(0, new Edge(greatestEdge.FromNode, closestnode));
f.Invoke(f.refresherDelegate);
while (Route.Count() < count)
{
closestnode = nodelist[0];
List<node> nodelistcopy2 = new List<node>(nodelist);
Edge edge2;
foreach (node item in nodelistcopy2)
{
foreach (Edge edge in Route)
{
NodetoEdgeStart = edgelist.Find(i => ((i.ToNode == item) && (i.FromNode == edge.FromNode)));
NodetoEdgeEnd = edgelist.Find(i => ((i.ToNode == edge.ToNode) && (i.FromNode == item)));
float CrossProduct = Math.Abs((edge.xdif * NodetoEdgeStart.ydif) - (edge.ydif * NodetoEdgeStart.xdif));
float D = CrossProduct / edge.distance;
float Dotproduct = edge.xdif * NodetoEdgeStart.xdif + edge.ydif * NodetoEdgeStart.ydif;
float t = Dotproduct / (edge.distance * edge.distance);
edge2 = Route.Find(i => (i.ToNode == edge.FromNode));
NodetoEdge2Start = edgelist.Find(i => ((i.ToNode == item) && (i.FromNode == edge2.FromNode)));
NodetoEdge2End = edgelist.Find(i => ((i.ToNode == edge2.ToNode) && (i.FromNode == item)));
float D2 = NodetoEdge2Start.distance + NodetoEdge2End.distance + edge.distance;
float D1 = NodetoEdgeStart.distance + NodetoEdgeEnd.distance + edge2.distance;
if ((t > 0) && (t < 1))
{
if (!Route.Contains(item.ClosestEdge))
{
item.ClosestEdgeDist = D;
item.ClosestEdge = edge;
}
else if (D < item.ClosestEdgeDist)
{
item.ClosestEdgeDist = D;
item.ClosestEdge = edge;
}
}
else if (!Route.Contains(item.ClosestEdge))
{
item.ClosestEdgeDist = NodetoEdgeStart.distance;
item.ClosestEdge = edge;
}
if (NodetoEdgeStart.distance <= item.ClosestEdgeDist)
{
item.ClosestEdgeDist = NodetoEdgeStart.distance;
if (D1 < D2)
{
item.ClosestEdge = edge;
}
else if (D1 > D2)
item.ClosestEdge = edge2;
else
item.ClosestEdge = edge;
}
else { }
}
if (item.ClosestEdgeDist < closestnode.ClosestEdgeDist)
{
closestnode = item;
}
}
markednodes.Add(closestnode);
nodelist.Remove(closestnode);
Route.Insert(Route.IndexOf(closestnode.ClosestEdge), new Edge(closestnode, closestnode.ClosestEdge.ToNode));
Route.Insert(Route.IndexOf(closestnode.ClosestEdge) - 1, new Edge(closestnode.ClosestEdge.FromNode, closestnode));
markednodes.Add(closestnode);
nodelist.Remove(closestnode);
Route.Remove(closestnode.ClosestEdge);
f.Invoke(f.refresherDelegate);
}
}
public void bruteFindFastest(List<node> nodes, node startnode)
{
int[] nodeIDlist = new int[nodes.Count() - 1];
float[,] distancelist = this.distanceList(nodes);
int numperms = this.FactNum(nodes.Count() - 1);
int[] fastestpath = new int[nodes.Count()];
int[] currentpath = new int[nodes.Count()];
route fastestroute;
route currentroute;
fastestpath[0] = startnode.id;
currentpath[0] = startnode.id;
int count = 0;
for (int i = 0; i < nodes.Count(); i++)
{
if (nodes[i].id != startnode.id)
{
nodeIDlist[count] = nodes[i].id;
count++;
}
}
nodeIDlist.CopyTo(fastestpath, 1);
fastestroute = new route(distancelist, fastestpath);
for (int i = 0; i < numperms - 1; i++)
{
nodeIDlist = NextPermutation(nodeIDlist);
nodeIDlist.CopyTo(currentpath, 1);
currentroute = new route(distancelist, currentpath);
if (currentroute.netdistance < fastestroute.netdistance)
{
currentpath.CopyTo(fastestpath, 0);
fastestroute = new route(distancelist, fastestpath);
}
}
fastestroute.printPath();
Console.WriteLine("\nDistance: " + fastestroute.netdistance);
Console.WriteLine("Traveling from and back to Node# " + startnode.id);
}
public static float distance(node fromNode, node toNode)
{
return distance(fromNode.x, fromNode.y, toNode.x, toNode.y);
}
private void button2_Click_1(object sender, EventArgs e)
{
int numNodes = int.Parse(maskedTextBox1.Text);
maskedTextBox1.ReadOnly = true;
nodelist = Driver.createRandomNodeList(numNodes);
edgelist = Driver.createEdgeList(nodelist);
startnode = nodelist[0];
this.count = nodelist.Count();
this.Controls.Add(panel1);
panel1.Show();
button2.Hide();
this.Controls.Add(startButton);
this.AcceptButton = startButton;
}
