private IEnumerable <CarvedCellResult> FillInPassage(IMazeCarver mazeCarver)
{
var list = new List <CarvedCellResult>();
var junctionOrStartOrEndReached = false;
do
{
var directions = mazeCarver.GetsDirectionsFromPoint().ToList();
if (directions.Count() == 1)
{
var direction = directions.First();
mazeCarver.FillInDirection(direction);
list.Add(new CarvedCellResult
{
Direction = direction,
Point = mazeCarver.CurrentPoint
});
mazeCarver.JumpInDirection(direction);
if (_pointsAndDirectionsRetriever.PointIsStartOrEnd(mazeCarver.CurrentPoint, mazeCarver.StartPoint, mazeCarver.EndPoint))
{
junctionOrStartOrEndReached = true;
}
}
else
{
junctionOrStartOrEndReached = true;
}
} while (!junctionOrStartOrEndReached);
return(list);
}
private IEnumerable <CarvedCellResult> FillInPassage(IMazeCarver mazeCarver)
{
var directions = mazeCarver.GetsDirectionsFromPoint().ToList();
if (directions.Count() == 1)
{
var direction = directions.First();
mazeCarver.FillInDirection(direction);
yield return(new CarvedCellResult
{
Direction = direction,
Point = mazeCarver.CurrentPoint
});
mazeCarver.JumpInDirection(direction);
if (!_pointsAndDirectionsRetriever.PointIsStartOrEnd(mazeCarver.CurrentPoint, mazeCarver.StartPoint, mazeCarver.EndPoint))
{
foreach (var d in FillInPassage(mazeCarver))
{
yield return(d);
}
}
}
}
private IEnumerable <GraphEdge> GetGraphEdges(IMazeCarver carver, PointAndDirections junction)
{
foreach (var direction in junction.Directions)
{
var result = new GraphEdge
{
DirectionsToPoint = new List <Direction>()
{
direction
}
};
carver.JumpToPoint(junction.Point);
carver.JumpInDirection(direction);
Direction inputDirection = direction;
bool endFound = false;
do
{
var directions = carver.GetsDirectionsFromPoint().ToList();
if (IsStartOrEndPointOrJunction(carver, directions))
{
result.Point = carver.CurrentPoint;
endFound = true;
}
else
{
var oppositeDirection = _directionsFlagParser.OppositeDirection(inputDirection);
directions = directions.Where(x => x != oppositeDirection).ToList();
inputDirection = directions.Single();
result.DirectionsToPoint.Add(inputDirection);
carver.JumpInDirection(inputDirection);
}
} while (!endFound);
yield return(result);
}
}
private void RandomCarveWalls(IMazeCarver carver, int numberOfWalls)
{
while (numberOfWalls > 0)
{
numberOfWalls = CheckPoint(_randomPointGenerator.RandomPoint(carver.Size), carver, numberOfWalls);
}
}
public AlgorithmRunResults GenerateMaze(IMazeCarver maze, MazeGenerationSettings settings)
{
var pointsAndDirections = new List <DirectionAndPoint>();
_mazeHelper.DoForEachPoint(maze.Size, p =>
{
maze.JumpToPoint(p);
var directions = _directions.Where(maze.CanCarveInDirection).ToList();
_arrayHelper.Shuffle(directions);
if (directions.Any())
{
var first = directions.First();
pointsAndDirections.Add(new DirectionAndPoint {
Direction = first, MazePoint = maze.CurrentPoint
});
maze.CarveInDirection(first);
}
});
return(new AlgorithmRunResults
{
Carver = maze,
DirectionsCarvedIn = pointsAndDirections
});
}
public AlgorithmRunResults GenerateMaze(IMazeCarver maze, MazeGenerationSettings settings)
{
var randomPoint = _randomPointGenerator.RandomPoint(maze.Size);
maze.JumpToPoint(randomPoint);
return(RecursiveBackTracker(maze));
}
public AlgorithmRunResults RecursiveBackTracker(IMazeCarver carver)
{
var pointsAndDirections = new List <DirectionAndPoint>();
var directions = carver.CarvableDirections().ToList();
_arrayHelper.Shuffle(directions);
var currentPoint = carver.CurrentPoint;
foreach (var direction in directions)
{
carver.JumpInDirection(direction);
var carvedDirections = carver.AlreadyCarvedDirections();
if (!carvedDirections.Any())
{
pointsAndDirections.Add(new DirectionAndPoint {
Direction = direction, MazePoint = currentPoint
});
var oppositeDirection = _directionsFlagParser.OppositeDirection(direction);
carver.CarveInDirection(oppositeDirection);
RecursiveBackTracker(carver);
}
carver.JumpToPoint(currentPoint);
}
return(new AlgorithmRunResults
{
Carver = carver,
DirectionsCarvedIn = pointsAndDirections
});
}
public Graph GetGraphFromMaze(IMazeCarver carver)
{
carver.SetState(ModelMode.DeadEndFilled);
var dictionary = new Dictionary <MazePoint, GraphNode>();
var junctions = _directionsRetriever.GetJunctions(carver);
foreach (var junction in junctions)
{
var graphNode = new GraphNode
{
Edges = GetGraphEdges(carver, junction).ToList(),
ShortestPath = int.MaxValue,
ShortestPathDirections = new List <Direction>()
};
dictionary.Add(junction.Point, graphNode);
}
if (!dictionary.ContainsKey(carver.StartPoint))
{
carver.JumpToPoint(carver.StartPoint);
var junction = new PointAndDirections
{
Point = carver.CurrentPoint,
Directions = carver.GetsDirectionsFromPoint().ToList(),
};
var graphNode = new GraphNode
{
Edges = GetGraphEdges(carver, junction).ToList(),
ShortestPath = int.MaxValue,
ShortestPathDirections = new List <Direction>()
};
dictionary.Add(carver.StartPoint, graphNode);
}
if (!dictionary.ContainsKey(carver.EndPoint))
{
carver.JumpToPoint(carver.EndPoint);
var junction = new PointAndDirections
{
Point = carver.CurrentPoint,
Directions = carver.GetsDirectionsFromPoint().ToList()
};
var graphNode = new GraphNode
{
Edges = GetGraphEdges(carver, junction).ToList(),
ShortestPath = int.MaxValue,
ShortestPathDirections = new List <Direction>()
};
dictionary.Add(carver.EndPoint, graphNode);
}
carver.SetState(ModelMode.Standard);
return(new Graph
{
Nodes = dictionary,
});
}
public AlgorithmRunResults GenerateMaze(IMazeCarver maze, MazeGenerationSettings settings)
{
var growingTreeSettings = settings as GrowingTreeSettings;
if (growingTreeSettings == null)
{
throw new ArgumentException("The correct settings are not present");
}
return(GenerateMaze(maze, growingTreeSettings.Strategies));
}
private IEnumerable <PointAndDirections> GetPointsWithDirections(IMazeCarver carver)
{
return(_mazeHelper.GetForEachPoint(carver.Size, point =>
{
carver.JumpToPoint(point);
return new PointAndDirections
{
Point = point,
Directions = carver.GetsDirectionsFromPoint().ToList()
};
}));
}
public ShortestPathResult GetGraph(IMazeCarver carver)
{
var graph = _graphBuilder.GetGraphFromMaze(carver);
graph.Nodes[carver.StartPoint].ShortestPath = 0;
ProcessGraph(graph);
var node = graph.Nodes[carver.EndPoint];
return(new ShortestPathResult
{
Graph = graph,
ShortestPath = node.ShortestPath,
ShortestPathDirections = node.ShortestPathDirections
});
}
private int CheckPoint(MazePoint point, IMazeCarver carver, int numberOfWalls, Direction preferredDirection = Direction.None)
{
carver.JumpToPoint(point);
var directions = carver.CarvableDirections().ToList();
_arrayHelper.Shuffle(directions);
if (directions.Any())
{
var selectedDirection = directions.Contains(preferredDirection)
? preferredDirection
: directions.First();
carver.CarveInDirection(selectedDirection);
numberOfWalls--;
}
return(numberOfWalls);
}
public AlgorithmRunResults GenerateMaze(IMazeCarver maze, MazeGenerationSettings settings)
{
var pointAndDirection = new List <DirectionAndPoint>();
var randomPoint = _randomPointGenerator.RandomPoint(maze.Size);
maze.JumpToPoint(randomPoint);
var activeCells = new LinkedList <MazePoint>();
activeCells.AddLast(randomPoint);
while (activeCells.Any())
{
var currentPoint = activeCells.Last.Value;
maze.JumpToPoint(currentPoint);
var carvableDirections = maze.CarvableDirections().ToList();
_arrayHelper.Shuffle(carvableDirections);
var carved = false;
foreach (var direction in carvableDirections)
{
maze.JumpInDirection(direction);
var carvedDirections = maze.AlreadyCarvedDirections();
if (!carvedDirections.Any())
{
pointAndDirection.Add(new DirectionAndPoint {
Direction = direction, MazePoint = currentPoint
});
var oppositeDirection = _directionsFlagParser.OppositeDirection(direction);
maze.CarveInDirection(oppositeDirection);
activeCells.AddLast(maze.CurrentPoint);
carved = true;
break;
}
maze.JumpToPoint(currentPoint);
}
if (!carved)
{
activeCells.RemoveLast();
}
}
return(new AlgorithmRunResults
{
Carver = maze,
DirectionsCarvedIn = pointAndDirection
});
}
private AlgorithmRunResults GenerateMaze(IMazeCarver maze, List <GrowingTreeStrategy> strategies)
{
var pointsAndDirections = new List <DirectionAndPoint>();
var randomPoint = _randomPointGenerator.RandomPoint(maze.Size);
var activeCells = new List <MazePoint> {
randomPoint
};
while (activeCells.Any())
{
var currentPoint = GetNextPoint(activeCells, strategies);
maze.JumpToPoint(currentPoint);
var carvableDirections = maze.CarvableDirections().ToList();
_arrayHelper.Shuffle(carvableDirections);
var carved = false;
foreach (var direction in carvableDirections)
{
maze.JumpInDirection(direction);
var carvedDirections = maze.AlreadyCarvedDirections();
if (!carvedDirections.Any())
{
pointsAndDirections.Add(new DirectionAndPoint {
Direction = direction, MazePoint = currentPoint
});
var oppositeDirection = _directionsFlagParser.OppositeDirection(direction);
maze.CarveInDirection(oppositeDirection);
activeCells.Add(maze.CurrentPoint);
carved = true;
break;
}
maze.JumpToPoint(currentPoint);
}
if (!carved)
{
activeCells.Remove(currentPoint);
}
}
return(new AlgorithmRunResults
{
Carver = maze,
DirectionsCarvedIn = pointsAndDirections
});
}
public void CarveRandomWalls(IMazeCarver carver, WallCarverOption option, int numberOfWalls)
{
switch (option)
{
case WallCarverOption.None:
break;
case WallCarverOption.Random:
RandomCarveWalls(carver, numberOfWalls);
break;
case WallCarverOption.DeadEnd:
DeadEndCarver(carver, numberOfWalls, false);
break;
case WallCarverOption.DeadEndWithPreferredDirection:
DeadEndCarver(carver, numberOfWalls, true);
break;
default:
throw new ArgumentOutOfRangeException();
}
}
public DeadEndFillerResult Fill(IMazeCarver mazeCarver)
{
mazeCarver.DoDeadEndWrapping(model =>
{
var deadEndModel = _deadEndModelWrapperFactory.MakeModel(model);
return(deadEndModel);
});
mazeCarver.SetState(ModelMode.DeadEndFilled);
var deadEndsRemaining = true;
var carvedDirections = new List <CarvedCellResult>();
while (deadEndsRemaining)
{
var pointsAndDirections = _pointsAndDirectionsRetriever
.GetDeadEnds(mazeCarver)
.Where(x => !_pointsAndDirectionsRetriever.PointIsStartOrEnd(x.Point, mazeCarver.StartPoint, mazeCarver.EndPoint)).ToList();
if (!pointsAndDirections.Any())
{
deadEndsRemaining = false;
}
else
{
foreach (var pointAndDirection in pointsAndDirections)
{
mazeCarver.JumpToPoint(pointAndDirection.Point);
carvedDirections.AddRange(FillInPassage(mazeCarver));
}
}
}
mazeCarver.SetState(ModelMode.Standard);
return(new DeadEndFillerResult
{
CellsFilledIn = carvedDirections,
TotalCellsFilledIn = carvedDirections.Count
});
}
private void DeadEndCarver(IMazeCarver carver, int numberOfWalls, bool hasPreferredDirection)
{
var pointsAndDirections = _pointsAndDirectionsRetriever.GetDeadEnds(carver).ToList();
_arrayHelper.Shuffle(pointsAndDirections);
foreach (var pointAndDirections in pointsAndDirections)
{
if (numberOfWalls > 0)
{
Direction preferredDirection = Direction.None;
if (hasPreferredDirection)
{
preferredDirection = _directionsFlagParser
.OppositeDirection(pointAndDirections.Directions.First());
}
numberOfWalls = CheckPoint(pointAndDirections.Point, carver, numberOfWalls, preferredDirection);
}
else
{
break;
}
}
RandomCarveWalls(carver, numberOfWalls);
}
private bool IsStartOrEndPointOrJunction(IMazeCarver carver, List <Direction> directions)
{
return(_directionsRetriever.PointIsStartOrEnd(carver.CurrentPoint, carver.StartPoint, carver.EndPoint) ||
_directionsRetriever.IsJunction(directions));
}
public IEnumerable <PointAndDirections> GetJunctions(IMazeCarver mazeCarver)
{
return(GetPointsWithDirections(mazeCarver).Where(x => IsJunction(x.Directions)));
}
public IEnumerable <PointAndDirections> GetCorridoors(IMazeCarver mazeCarver)
{
return(GetPointsWithDirections(mazeCarver).Where(x => IsCorridoor(x.Directions)));
}
public MazeGenerationResults GenerateMaze(MazeGenerationSettings settings)
{
IMazeCarver carver = null;
var modelBuildTime = _timeRecorder.GetRunningTime(() =>
{
var model = _mazeModelFactory.BuildMaze(settings);
carver = _mazeFactory.GetMazeCarver(model);
});
AlgorithmRunResults results = null;
int extraWallsAdded = 0;
var generationTime = _timeRecorder.GetRunningTime(() =>
{
switch (settings.Algorithm)
{
case Algorithm.None:
throw new ArgumentException("None not supported");
case Algorithm.GrowingTreeAlgorithm:
results = _growingTreeAlgorithm.GenerateMaze(carver, settings);
break;
case Algorithm.RecursiveBacktrackerAlgorithm:
results = _recursiveBacktrackerAlgorithm.GenerateMaze(carver, settings);
break;
case Algorithm.BinaryTreeAlgorithm:
results = _binaryTreeAlgorithm.GenerateMaze(carver, settings);
break;
default:
throw new ArgumentException("Unsupported algorithm type");
}
carver = results.Carver;
extraWallsAdded = _extraWall.Calulate(carver.Size);
_randomCarver.CarveRandomWalls(carver, settings.ExtraWalls, extraWallsAdded);
});
DeadEndFillerResult deadEndFillerResults = null;
var deadEndFillerTime = _timeRecorder.GetRunningTime(() =>
{
deadEndFillerResults = _deadEndFiller.Fill(carver);
});
AgentResults result = null;
var agentGenerationTime = _timeRecorder.GetRunningTime(() =>
{
if (settings.AgentType != AgentType.None)
{
result = _agentFactory.MakeAgent(settings.AgentType).RunAgent(carver);
}
});
HeuristicsResults heuristicsResults = null;
var heuristicsTime = _timeRecorder.GetRunningTime(() =>
{
heuristicsResults = _heuristicsGenerator.GetResults(results);
});
var times = new [] { modelBuildTime, generationTime, deadEndFillerTime, agentGenerationTime, heuristicsTime };
var totalTime = times.Aggregate(new TimeSpan(), (seed, value) => seed.Add(value));
return(new MazeGenerationResults
{
MazeJumper = carver.CarvingFinished(),
HeuristicsResults = heuristicsResults,
DirectionsCarvedIn = results.DirectionsCarvedIn,
DeadEndFillerResults = deadEndFillerResults,
ModelTime = modelBuildTime,
AgentResults = result,
GenerationTime = generationTime,
DeadEndFillerTime = deadEndFillerTime,
AgentGenerationTime = agentGenerationTime,
HeuristicsTime = heuristicsTime,
TotalTime = totalTime
});
}