private void AddAvoidList(ChallengeMap map, HashSet <PathNode> pathNodeSearchedList, List <PathNode> avoidNodeList, bool includeTopNode = false)
{
int index = 0;
foreach (PathNode node in pathNodeSearchedList)
{
if (includeTopNode)
{
if (!avoidNodeList.Contains(node) && node.coordinate_X != map.MaxCountX - 1)
{
avoidNodeList.Add(node);
}
}
else
{
if (index > 0)
{
if (!avoidNodeList.Contains(node) && node.coordinate_X != map.MaxCountX - 1)
{
avoidNodeList.Add(node);
}
}
}
index++;
}
//return avoidNodeList;
}
static void Main(string[] args)
{
try
{
ChallengeMap map = new ChallengeMap();
map.Create("map.txt");
PathFinder pathFinder = new PathFinder();
pathFinder.SearchPath(map);
if (pathFinder.CalculatedPath != null && pathFinder.CalculatedPath.Trim() != string.Empty)
{
Console.WriteLine("\n\n");
Console.WriteLine("Length Of Calculated Path: " + pathFinder.LengthOfCalculatedPath);
Console.WriteLine("Drop Of Calculated Path: " + pathFinder.DropOfCalculatedPath);
Console.WriteLine("Calculated Path: " + pathFinder.CalculatedPath);
}
else
{
Console.WriteLine("No Possible Path Down!");
}
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
Console.Read();
}
public void SearchPath(ChallengeMap map)
{
int[,] mapPath = new int[map.MaxCountX, map.MaxCountY];
PathNode[,] pathMap = new PathNode[map.MaxCountX, map.MaxCountY];
for (int mapIndex_X = 0; mapIndex_X < map.MaxCountX; mapIndex_X++)
{
for (int mapIndex_Y = 0; mapIndex_Y < map.MaxCountY; mapIndex_Y++)
{
PathNode node = new PathNode();
node.data = int.Parse(map.challengeMap[mapIndex_X, mapIndex_Y]);
node.coordinate_X = mapIndex_X;
node.coordinate_Y = mapIndex_Y;
pathMap[mapIndex_X, mapIndex_Y] = node;
}
}
List <PathNode> targetNodes = new List <PathNode>();
targetNodes = findAllStartingNode(map, pathMap);
List <List <PathNode> > TotalPath_List = findPath(pathMap, map, targetNodes).OrderByDescending(x => x.Count).ToList();
if (TotalPath_List.Count > 0)
{
TotalPath_List = filterTopPaths(TotalPath_List);
findSteepestNodePath(TotalPath_List);
}
}
private void GetAllBottleNeckNodes(PathNode[,] pathMap, ChallengeMap map, HashSet <PathNode> bottleNeckNodes)
{
for (int mapIndex_X = 0; mapIndex_X < map.MaxCountX; mapIndex_X++)
{
for (int mapIndex_Y = 0; mapIndex_Y < map.MaxCountY; mapIndex_Y++)
{
if (pathMap[mapIndex_X, mapIndex_Y].data < map.MaxCountX - mapIndex_X)
{
bottleNeckNodes.Add(pathMap[mapIndex_X, mapIndex_Y]);
}
}
}
}
private List <PathNode> findAllStartingNode(ChallengeMap map, PathNode[,] pathMap)
{
//x,y,data
List <PathNode> nodeList = new List <PathNode>();
List <PathNode> nodeListSameValue = new List <PathNode>();
for (int mapIndex_X = 0; mapIndex_X < map.MaxCountX; mapIndex_X++)
{
PathNode highestNodeValue = new PathNode();
for (int mapIndex_Y = 0; mapIndex_Y < map.MaxCountY; mapIndex_Y++)
{
if (mapIndex_X < map.MaxCountX - 1)
{
if (pathMap[mapIndex_X, mapIndex_Y].data > highestNodeValue.data)
{
highestNodeValue = pathMap[mapIndex_X, mapIndex_Y];
nodeListSameValue = new List <PathNode>();
nodeListSameValue.Add(highestNodeValue);
}
else
{
if (pathMap[mapIndex_X, mapIndex_Y].data == highestNodeValue.data && highestNodeValue.data > 0 || pathMap[mapIndex_X, mapIndex_Y].data >= map.MaxCountX - mapIndex_X && highestNodeValue.data > 0)
{
nodeListSameValue.Add(pathMap[mapIndex_X, mapIndex_Y]);
}
}
}
}
if (highestNodeValue.data > 0 && nodeListSameValue.Count > 0)
{
foreach (PathNode node in nodeListSameValue)
{
nodeList.Add(node);
}
nodeListSameValue = new List <PathNode>();
}
}
return(nodeList);
}
private List <PathNode> ClearAvoidNodeListBaseOnDirection(ChallengeMap map, PathNode currentNode, List <PathNode> avoidNodeList, int direction)
{
List <PathNode> indexRemoveList = new List <PathNode>();
int coordinate_X = currentNode.coordinate_X;
if (direction == Direction.Down)
{
coordinate_X = currentNode.coordinate_X + 1;
}
for (int index = 0; index < avoidNodeList.Count; index++)
{
if (avoidNodeList[index].coordinate_X == coordinate_X)
{
//CHECK CURRENT SCAN DIRECTION
switch (direction)
{
case Direction.Left:
{
if (currentNode.coordinate_Y > 0)
{
if (avoidNodeList[index].coordinate_Y < currentNode.coordinate_Y)
{
indexRemoveList.Add(avoidNodeList[index]);
avoidNodeList.Remove(avoidNodeList[index]);
break;
}
}
break;
}
case Direction.Right:
{
if (currentNode.coordinate_Y < map.MaxCountY - 1)
{
if (avoidNodeList[index].coordinate_Y > currentNode.coordinate_Y)
{
indexRemoveList.Add(avoidNodeList[index]);
avoidNodeList.Remove(avoidNodeList[index]);
break;
}
}
break;
}
case Direction.Down:
{
if (avoidNodeList[index].coordinate_Y != currentNode.coordinate_Y && currentNode.coordinate_Y > 0)
{
if (avoidNodeList[index].coordinate_Y == currentNode.coordinate_Y - 1)
{
indexRemoveList.Add(avoidNodeList[index]);
avoidNodeList.Remove(avoidNodeList[index]);
}
}
else if (avoidNodeList[index].coordinate_Y != currentNode.coordinate_Y && currentNode.coordinate_Y < map.MaxCountY - 1)
{
if (avoidNodeList[index].coordinate_Y == currentNode.coordinate_Y + 1)
{
indexRemoveList.Add(avoidNodeList[index]);
avoidNodeList.Remove(avoidNodeList[index]);
}
}
break;
}
}
}
}
return(indexRemoveList);
}
private List <List <PathNode> > findPath(PathNode[,] pathMap, ChallengeMap map, List <PathNode> targetNodes)
{
DirectionScanner scanner = new DirectionScanner();
int nodeCounter = 0;
//GET ALL BOTTLENECK NODES
GetAllBottleNeckNodes(pathMap, map, scanner.bottleNeckList);
List <PathNode> NodeCleared = new List <PathNode>();
//Scan Twice to properly scan the whole Map
for (int scanning = 0; scanning < 2; scanning++)
{
foreach (PathNode node in targetNodes)
{
nodeCounter++;
string valuesCount = (((double)nodeCounter / (targetNodes.Count() * 2)) * 100).ToString();
Console.WriteLine(" Scanning ChallengeMap: " + (int)Convert.ToDouble(valuesCount, CultureInfo.InvariantCulture.NumberFormat) + "%");
Console.SetCursorPosition(0, 0);
scanner.pathNodeSearched = new List <PathNode>();
scanner.avoidNodeList = new List <PathNode>();
scanner.pathNodeSearched.Add(pathMap[node.coordinate_X, node.coordinate_Y]);
scanner.currentNode = pathMap[node.coordinate_X, node.coordinate_Y];
bool hasScanned = false;
int maxcounter = 0;
while (true)
{
if (scanner.bottleNeckList.Contains(scanner.currentNode))
{
scanner.pathNodeSearched.Remove(scanner.currentNode);
scanner.currentNode = scanner.pathNodeSearched[scanner.pathNodeSearched.Count - 1];
}
//Scanning Left Direction - FirstScan
if (scanning == 0)
{
hasScanned = scanner.ScanLeft(pathMap);
//Left Scan
if (hasScanned)
{
NodeCleared = ClearAvoidNodeListBaseOnDirection(map, scanner.currentNode, scanner.avoidNodeList, Direction.Left);
if (NodeCleared.Count == 0)
{
NodeCleared = ClearAvoidNodeListBaseOnDirection(map, scanner.currentNode, scanner.avoidNodeList, Direction.Down);
}
continue;
}
else
{
hasScanned = scanner.ScanRight(pathMap, map.MaxCountY);
}
//Right Scan
if (hasScanned)
{
NodeCleared = ClearAvoidNodeListBaseOnDirection(map, scanner.currentNode, scanner.avoidNodeList, Direction.Right);
if (NodeCleared.Count == 0)
{
NodeCleared = ClearAvoidNodeListBaseOnDirection(map, scanner.currentNode, scanner.avoidNodeList, Direction.Down);
}
continue;
}
}
else //Scanning Right Direction - SecondScan
{
hasScanned = scanner.ScanRight(pathMap, map.MaxCountY);
//Right Scan
if (hasScanned)
{
NodeCleared = ClearAvoidNodeListBaseOnDirection(map, scanner.currentNode, scanner.avoidNodeList, Direction.Right);
if (NodeCleared.Count == 0)
{
NodeCleared = ClearAvoidNodeListBaseOnDirection(map, scanner.currentNode, scanner.avoidNodeList, Direction.Down);
}
continue;
}
else
{
hasScanned = scanner.ScanLeft(pathMap);
}
//Left Scan
if (hasScanned)
{
NodeCleared = ClearAvoidNodeListBaseOnDirection(map, scanner.currentNode, scanner.avoidNodeList, Direction.Left);
if (NodeCleared.Count == 0)
{
NodeCleared = ClearAvoidNodeListBaseOnDirection(map, scanner.currentNode, scanner.avoidNodeList, Direction.Down);
}
continue;
}
}
if (!hasScanned)
{
hasScanned = scanner.ScanDownward(pathMap, map.MaxCountX);
if (NodeCleared.Count() > 0)
{
//Add All Cleared Nodes in PreviousStage
AddAvoidList(map, new HashSet <PathNode>()
{
scanner.currentNode
}, scanner.avoidNodeList, true);
NodeCleared = new List <PathNode>();
}
if (hasScanned)
{
NodeCleared = ClearAvoidNodeListBaseOnDirection(map, scanner.currentNode, scanner.avoidNodeList, Direction.Down);
}
if (hasScanned)
{
//CHECK IF END OF MAP IS REACHED
if (scanner.pathNodeSearched[scanner.pathNodeSearched.Count - 1].coordinate_X == map.MaxCountX - 1)
{
if (isPathSearchedAlreadyAdded(scanner.pathNodeInTotalSearched, scanner.pathNodeSearched))
{
break;
}
else
{
scanner.pathNodeInTotalSearched.Add(scanner.pathNodeSearched);
}
AddAvoidList(map, scanner.pathNodeSearched, scanner.avoidNodeList);
scanner.pathNodeSearched = new List <PathNode>();
scanner.currentNode = pathMap[node.coordinate_X, node.coordinate_Y];
ClearAllAvoidNodeInCurrentXIndex(scanner.currentNode.coordinate_X, map.MaxCountY, scanner.avoidNodeList);
scanner.pathNodeSearched.Add(pathMap[node.coordinate_X, node.coordinate_Y]);
}
continue;
}
if (!hasScanned && scanner.currentNode == scanner.pathNodeSearched[0])
{
maxcounter++;
if (maxcounter >= DirectionScanner.CURRENTNODE_MAXCOUNT)
{
break;
}
}
}
}
}
}
return(scanner.pathNodeInTotalSearched);
}
