public Node(Move move, Node parent, State state)
{
this.random = new Random();
this.state = state;
this.generatingMove = move;
this.parent = parent;
this.results = 0;
this.visits = 0;
this.children = new List<Node>();
this.untriedMoves = state.GetMoves();
}
// adds a child node to the list of children
// after exploring a move - removes the move from untried
public Node AddChild(Move move, State state)
{
Node child = new Node(move, this, state);
this.untriedMoves.Remove(move);
this.children.Add(child);
return child;
}
// Applies the move to this state and returns the resulting state
public State ApplyMove(Move move)
{
if (move is PlayerMove)
{
int[][] clonedBoard = BoardHelper.CloneBoard(this.board);
if (((PlayerMove)move).Direction == DIRECTION.LEFT)
{
State state = ApplyLeft(clonedBoard);
state.GeneratingMove = move;
return state;
}
else if (((PlayerMove)move).Direction == DIRECTION.RIGHT)
{
State state = ApplyRight(clonedBoard);
state.GeneratingMove = move;
return state;
}
else if (((PlayerMove)move).Direction == DIRECTION.DOWN)
{
State state = ApplyDown(clonedBoard);
state.GeneratingMove = move;
return state;
}
else if (((PlayerMove)move).Direction == DIRECTION.UP)
{
State state = ApplyUp(clonedBoard);
state.GeneratingMove = move;
return state;
}
else throw new Exception();
}
else if (move is ComputerMove)
{
State result = new State(BoardHelper.CloneBoard(this.board), points, GameEngine.PLAYER);
int xPosition = ((ComputerMove)move).Position.Item1;
int yPosition = ((ComputerMove)move).Position.Item2;
int tileValue = ((ComputerMove)move).Tile;
result.Board[xPosition][yPosition] = tileValue;
result.GeneratingMove = move;
return result;
}
else
{
throw new Exception();
}
}