internal override MazeTransformationStep TryPlaceExit()
{
List <MazeCoordinate> possibleExits = new List <MazeCoordinate>();
// collect all possible exits
for (int i = CurrentMaze.GetWidth() - 2; i >= 1; i--)
{
possibleExits.Add(new MazeCoordinate(i, downright.Y));
}
// check in random order if exit is valid
while (possibleExits.Count > 0)
{
var possibleExit = possibleExits.ElementAt(Random.Next(possibleExits.Count));
if (CurrentMaze.GetMazeTypeOnPos(possibleExit.X, possibleExit.Y + 1) == MazeFieldType.Corridor)
{
return(CurrentMaze.SetMazeTypeOnPos(possibleExit, MazeFieldType.Exit));
}
else
{
possibleExits.Remove(possibleExit);
}
}
// TODO Maybe not the best way to handle this, but the maze is useless without valid exit.
throw new Exception("Could not find a suitable exit position.");
}
public override IEnumerable <MazeTransformationStep> InitializeMaze()
{
downright = new MazeCoordinate(CurrentMaze.GetWidth() - 1, 0);
upperleft = new MazeCoordinate(0, CurrentMaze.GetHeight() - 1);
CurrentMaze.OverrideAllMazeFields(MazeFieldType.Wall);
return(null);
}
internal override MazeTransformationStep TryPlaceEntrance()
{
// no need to check, the nature of the algorithm will guarantee that all positions on this side are valid entrances.
return(this.CurrentMaze.SetMazeTypeOnPos(Random.Next(1, CurrentMaze.GetWidth() - 2), 0, MazeFieldType.Entrance));
}