// Start is called before the first frame update
void Start()
{
this.fileReader = new FileReader();
this.mazeParser = new DominoParser(fileReader.getFileLines());
this.maze = mazeParser.getDominoMaze();
shortestPathFromStart = new Dictionary <Vector2, Path>();
orderChecked = new List <Vector2>();
this.start = this.mazeParser.startNode;
this.end = this.mazeParser.endNode;
Visited = new HashSet <Vector2>();
toVisit = new SortedList <int, Queue <DominoNode> >();
this.start.costToGetToFromStart = 0;
start.cost = 0;
addToVisit(start);
start.DominoPiece.GetComponent <Renderer>().material.SetColor("_BaseColor", Color.green);
shortestPathFromStart.Add(start.getPlaceInMaze(), new Path()
{
cost = start.costToGetToFromStart, path = new List <DominoNode> {
start
}
});
stopwatch = new Stopwatch();
stopwatch.Start();
}
/// <summary>
/// Copy path to get to neighbor into newPath and append new end point
/// </summary>
/// <param name="currentDominoNode"></param>
/// <param name="newPath"></param>
/// <param name="end"></param>
public void copyPath(DominoNode currentDominoNode, out List <DominoNode> newPath, DominoNode end)
{
newPath = new List <DominoNode>();
foreach (DominoNode dominoNode in shortestPathFromStart[currentDominoNode.getPlaceInMaze()].path)
{
newPath.Add(dominoNode);
}
newPath.Add(end);
}
public DominoParser(List <string> dominoMazeFile)
{
if (dominoMazeFile.Count == 0 || dominoMazeFile == null)
{
throw new Exception("Bad Domino Maze parse call!!! Need to pass a valid DominoMazeFile In the format of List<string>!!! Got empty List!!!");
}
this.dominoMaze = new List <List <DominoNode> >();
for (int r = 0; r < dominoMazeFile.Count; r++)
{
if (dominoMazeFile[r].Length > 0)
{
if (dominoMazeFile[r].StartsWith("#") || dominoMazeFile[r].StartsWith("//"))
{
continue; // Ignore comment lines
}
if (dominoMazeFile[r].StartsWith("start") || dominoMazeFile[r].StartsWith("end"))
{
string[] tmp = dominoMazeFile[r].Trim().Split('=');
tmp = tmp[1].Trim().Split(':');
Tuple <int, int> location = new Tuple <int, int>(Int32.Parse(tmp[0]), Int32.Parse(tmp[1]));
if (dominoMazeFile[r].StartsWith("end"))
{
this.end = new Vector2(location.Item1, location.Item2);
}
else
{
this.start = new Vector2(location.Item1, location.Item2);
}
}
if (dominoMazeFile[r].StartsWith("maze"))
{
r++;
int startOfMaze = r;
while (!dominoMazeFile[r].StartsWith("}"))
{
string[] dominoNodes = dominoMazeFile[r].Trim().Split(','); // Split nodes that are in format "pip:Orientation pip:Orientation..."
List <DominoNode> row = new List <DominoNode>();
for (int c = 0; c < dominoNodes.Length; c++)
{
string[] dominoPack = dominoNodes[c].Trim().Split(':');
if (dominoPack.Length < 2)
{
throw new Exception("Bad DominoNode!! need to be in format of 'pip:orientation,'\n\tError at line " + r.ToString() + " Column " + c.ToString());
}
int pip = Int32.Parse(dominoPack[0]);
row.Add(new DominoNode(pip, dominoPack[1], new Vector2(c, r - startOfMaze), ((end.x + c) + (end.y - (r - startOfMaze)))));
}
this.dominoMaze.Add(row);
r++;
}
}
}
}
startNode = this.dominoMaze[(int)start.y][(int)start.x];
endNode = this.dominoMaze[(int)end.y][(int)end.x];
int width = this.dominoMaze[0].Count;
int height = dominoMaze.Count;
// Set DominoNode Connections
for (int r = 0; r < dominoMaze.Count; r++)
{
for (int c = 0; c < dominoMaze[r].Count; c++)
{
DominoNode curNode = dominoMaze[r][c];
if (r > 0 && curNode.isPipEqual(dominoMaze[r - 1][c].getPip())) //check domino node above
{
curNode.setConnection(dominoMaze[r - 1][c]);
}
if (r < height - 1 && curNode.isPipEqual(dominoMaze[r + 1][c].getPip())) //check domino node bellow
{
curNode.setConnection(dominoMaze[r + 1][c]);
}
if (c < width - 1 && curNode.isPipEqual(dominoMaze[r][c + 1].getPip())) //check domino node to the right
{
curNode.setConnection(dominoMaze[r][c + 1]);
}
if (c > 0 && curNode.isPipEqual(dominoMaze[r][c - 1].getPip())) //check domino node to the left
{
curNode.setConnection(dominoMaze[r][c - 1]);
}
//Handle Orientation
switch (curNode.getOrientation())
{
case "u": curNode.setConnection(dominoMaze[r - 1][c]);
break;
case "d": curNode.setConnection(dominoMaze[r + 1][c]);
break;
case "r": curNode.setConnection(dominoMaze[r][c + 1]);
break;
case "l": curNode.setConnection(dominoMaze[r][c - 1]);
break;
default:
throw new Exception("Bad orientation Exception!!!! Domino node needs to be either l,r,u,d instead got: " + curNode.getOrientation() + "\n\tError at Node: " + curNode.getPlaceInMaze().ToString());
}
}
}
}
public void traverse(List <List <DominoNode> > maze)
{
HashSet <DominoNode> Visited = new HashSet <DominoNode>();
List <DominoNode> toVisit = new List <DominoNode>();
this.start.costToGetToFromStart = 0;
start.cost = 0;
toVisit.Add(start);
shortestPathFromStart.Add(start.getPlaceInMaze(), new Path()
{
cost = start.costToGetToFromStart, path = new List <DominoNode> {
start
}
});
while (toVisit.Count > 0)
{
toVisit.Sort();
DominoNode currentDominoNode = toVisit[0];
orderChecked.Add(currentDominoNode.getPlaceInMaze());
Visited.Add(currentDominoNode);
if (currentDominoNode == end)
{
break;
}
foreach (DominoNode neighboringDomino in currentDominoNode.connections)
{
int costToGetTo = shortestPathFromStart[currentDominoNode.getPlaceInMaze()].cost + 1;
// Neightbor already visited before,
// check if path to it from this city is cheaper then current path
if (Visited.Contains(neighboringDomino) || shortestPathFromStart.ContainsKey(neighboringDomino.getPlaceInMaze()))
{
// New Path is cheaper to this city
if (shortestPathFromStart[neighboringDomino.getPlaceInMaze()].cost > costToGetTo)
{
neighboringDomino.cost = costToGetTo;
List <DominoNode> pathToCity;
copyPath(currentDominoNode, out pathToCity, neighboringDomino);
shortestPathFromStart[neighboringDomino.getPlaceInMaze()] = new Path()
{
cost = costToGetTo, path = pathToCity
};
}
}
// Otherwise add city to toVisit to have its neighbors checked
else
{
neighboringDomino.cost = costToGetTo + (usingAStar ? (int)neighboringDomino.getHeuristic() : 0);
toVisit.Add(neighboringDomino);
List <DominoNode> pathToCity;
copyPath(currentDominoNode, out pathToCity, neighboringDomino);
if (shortestPathFromStart.ContainsKey(neighboringDomino.getPlaceInMaze()))
{
printOutPaths();
throw new Exception("Trying to add CityPath that is already added!!");
}
else
{
shortestPathFromStart.Add(neighboringDomino.getPlaceInMaze(), new Path()
{
cost = costToGetTo, path = pathToCity
});
}
}
}
toVisit.RemoveAt(0);
}
}
