/// <summary>
/// Removes the given child of node.
/// </summary>
/// <param name="child">Child to remove</param>
public void RemoveChild(GameTreeNode child)
{
if (!Branches.RemoveNode(child))
{
throw new InvalidOperationException("Cannot remove child: The given node is not a child of current node");
}
}
/// <summary>
/// Creates a game tree with a given ruleset
/// </summary>
public GameTree(IRuleset ruleset, GameBoardSize boardSize)
{
Ruleset = ruleset;
BoardSize = boardSize;
GameTreeRoot = new GameTreeNode();
GameTreeRoot.BoardState = new GameBoard(boardSize);
GameTreeRoot.GroupState = new GroupState(ruleset.RulesetInfo);
LastNode = GameTreeRoot;
}
/// <summary>
/// Creates a game tree with a given ruleset and root
/// </summary>
/// <param name="ruleset">Ruleset</param>
/// <param name="boardSize">Board size</param>
/// <param name="gameTreeRoot">Root</param>
public GameTree(IRuleset ruleset, GameBoardSize boardSize, GameTreeNode gameTreeRoot)
{
Ruleset = ruleset;
BoardSize = boardSize;
GameTreeRoot = gameTreeRoot;
var lastNode = gameTreeRoot;
while (lastNode.NextNode != null)
{
lastNode = lastNode.NextNode;
}
LastNode = lastNode;
}
public static StoneColor GetOpponentColor(this StoneColor color, GameTreeNode prevNode, GameTreeNode root)
{
if (color == StoneColor.White)
{
return(StoneColor.Black);
}
else if (color == StoneColor.Black)
{
return(StoneColor.White);
}
else
{
if (prevNode.Equals(root))
{
return(StoneColor.Black);
}
else
{
return(StoneColor.White);
}
}
}
/// <summary>
/// Implementation of adding a new node into the primary timeline of the tree
/// </summary>
/// <param name="move">Added move</param>
/// <param name="boardState">State of the board</param>
/// <param name="groupState">Group state associated with that board state.</param>
/// <returns></returns>
private GameTreeNode AddMoveToEndInternal(Move move, GameBoard boardState, GroupState groupState)
{
GameTreeNode node = new GameTreeNode(move)
{
BoardState = boardState, GroupState = groupState
};
LastNode.Branches.Insert(0, node);
node.Parent = LastNode;
node.Prisoners.BlackPrisoners = node.Parent.Prisoners.BlackPrisoners;
node.Prisoners.WhitePrisoners = node.Parent.Prisoners.WhitePrisoners;
if (move.WhoMoves == StoneColor.Black)
{
node.Prisoners.BlackPrisoners += move.Captures.Count();
}
else
{
node.Prisoners.WhitePrisoners += move.Captures.Count();
}
LastNode = node;
return(node);
}
