/// <summary>
/// Update the AI player.
/// </summary>
/// <param name="board">The current game board.</param>
public override void Update(Board board)
{
// safety-check the board parameter
if (board == null)
{
throw new ArgumentNullException("board");
}
// if it's not our turn, then we're done
if (board.CurrentColor != BoardColor)
{
return;
}
// generate a new move.
Move move;
bool moveFound = false;
// in order to begin the game with some variety, the AI will make random
// acceptable moves until 25 moves have been made, then switch to minimax
int totalPieces = board.GetColorCount(BoardColor) +
board.GetOppositeColorCount(BoardColor);
if (totalPieces <= randomMoveCutoff)
{
moveFound = GenerateMoveRandom(board, out move);
}
else
{
moveFound = GenerateMoveMiniMax(board, maximumDepth, out move);
}
// apply the move
if (moveFound)
{
board.ApplyMove(BoardColor, move);
}
else
{
board.Pass(BoardColor);
}
}
/// <summary>
/// Create an alternate version of the board where a certain move was made.
/// </summary>
/// <param name="boardColor">The color of the player making the move.</param>
/// <param name="move">The move.</param>
/// <returns>The board as of the new move.</returns>
/// <remarks>Useful for previewing and AI algorithms.</remarks>
public Board CheckMove(BoardColors boardColor, Move move)
{
// make sure it's a valid move
if (!IsValidMove(boardColor, move))
{
return(null);
}
// create a copy of the existing board
Board board = new Board(boardSize);
board.blackPieceCount = blackPieceCount;
board.whitePieceCount = whitePieceCount;
board.currentColor = currentColor;
// array is of value type, so shallow is fine
board.spaces = spaces.Clone() as BoardColors[, ];
board.ApplyMove(boardColor, move);
return(board);
}
public override void Update(Board board)
{
// safety check the parameter
if (board == null)
{
throw new ArgumentNullException("board");
}
// quit now if it's not my turn
if (board.CurrentColor != BoardColor)
{
return;
}
// check if we have a valid move
if (checkValidMove)
{
if (board.HasValidMove(BoardColor))
{
checkValidMove = false; // already checked, waiting for selection
}
else
{
board.Pass(BoardColor);
}
}
// if we don't have any input, don't bother
if (inputState == null)
{
return;
}
// apply selection-movement input and generate a desired movement
Point cursorMovement = new Point(0, 0);
float degrees = (int)SimpleArcCamera.Rotation % 360 - 180;
if (Math.Abs(degrees) < 45)
{
if (inputState.IsPieceSelectionUp(playerIndex))
{
cursorMovement.Y--;
}
if (inputState.IsPieceSelectionDown(playerIndex))
{
cursorMovement.Y++;
}
if (inputState.IsPieceSelectionLeft(playerIndex))
{
cursorMovement.X--;
}
if (inputState.IsPieceSelectionRight(playerIndex))
{
cursorMovement.X++;
}
}
else if ((degrees >= 45) && (degrees < 135))
{
if (inputState.IsPieceSelectionUp(playerIndex))
{
cursorMovement.X++;
}
if (inputState.IsPieceSelectionDown(playerIndex))
{
cursorMovement.X--;
}
if (inputState.IsPieceSelectionLeft(playerIndex))
{
cursorMovement.Y--;
}
if (inputState.IsPieceSelectionRight(playerIndex))
{
cursorMovement.Y++;
}
}
else if (Math.Abs(degrees) >= 135)
{
if (inputState.IsPieceSelectionUp(playerIndex))
{
cursorMovement.Y++;
}
if (inputState.IsPieceSelectionDown(playerIndex))
{
cursorMovement.Y--;
}
if (inputState.IsPieceSelectionLeft(playerIndex))
{
cursorMovement.X++;
}
if (inputState.IsPieceSelectionRight(playerIndex))
{
cursorMovement.X--;
}
}
else if ((degrees > -135) && (degrees <= -45))
{
if (inputState.IsPieceSelectionUp(playerIndex))
{
cursorMovement.X--;
}
if (inputState.IsPieceSelectionDown(playerIndex))
{
cursorMovement.X++;
}
if (inputState.IsPieceSelectionLeft(playerIndex))
{
cursorMovement.Y++;
}
if (inputState.IsPieceSelectionRight(playerIndex))
{
cursorMovement.Y--;
}
}
// check for valid move and apply
if (board.IsValidSpace(cursorPosition.X + cursorMovement.X,
cursorPosition.Y + cursorMovement.Y))
{
cursorPosition.X += cursorMovement.X;
cursorPosition.Y += cursorMovement.Y;
}
// apply play-piece input
if (inputState.IsPlayPiece(playerIndex))
{
Move move = new Move(cursorPosition.X, cursorPosition.Y);
if (board.IsValidMove(BoardColor, move))
{
board.ApplyMove(BoardColor, move);
checkValidMove = true;
}
else
{
AudioManager.PlayCue("Drop_Illegal");
}
}
}
/// <summary>
/// Create an alternate version of the board where a certain move was made.
/// </summary>
/// <param name="boardColor">The color of the player making the move.</param>
/// <param name="move">The move.</param>
/// <returns>The board as of the new move.</returns>
/// <remarks>Useful for previewing and AI algorithms.</remarks>
public Board CheckMove( BoardColors boardColor, Move move ) {
// make sure it's a valid move
if( !IsValidMove( boardColor, move ) ) {
return null;
}
// create a copy of the existing board
Board board = new Board( boardSize );
board.blackPieceCount = blackPieceCount;
board.whitePieceCount = whitePieceCount;
board.currentColor = currentColor;
// array is of value type, so shallow is fine
board.spaces = spaces.Clone() as BoardColors[ , ];
board.ApplyMove( boardColor, move );
return board;
}
public override void Update( Board board ) {
// safety check the parameter
if( board == null ) {
throw new ArgumentNullException( "board" );
}
// quit now if it's not my turn
if( board.CurrentColor != BoardColor ) {
return;
}
// check if we have a valid move
if( checkValidMove ) {
if( board.HasValidMove( BoardColor ) ) {
checkValidMove = false; // already checked, waiting for selection
} else {
board.Pass( BoardColor );
}
}
// if we don't have any input, don't bother
if( inputState == null ) {
return;
}
// apply selection-movement input and generate a desired movement
Point cursorMovement = new Point( 0, 0 );
float degrees = (int)SimpleArcCamera.Rotation % 360 - 180;
if( Math.Abs( degrees ) < 45 ) {
if( inputState.IsPieceSelectionUp( playerIndex ) ) {
cursorMovement.Y--;
}
if( inputState.IsPieceSelectionDown( playerIndex ) ) {
cursorMovement.Y++;
}
if( inputState.IsPieceSelectionLeft( playerIndex ) ) {
cursorMovement.X--;
}
if( inputState.IsPieceSelectionRight( playerIndex ) ) {
cursorMovement.X++;
}
} else if( ( degrees >= 45 ) && ( degrees < 135 ) ) {
if( inputState.IsPieceSelectionUp( playerIndex ) ) {
cursorMovement.X++;
}
if( inputState.IsPieceSelectionDown( playerIndex ) ) {
cursorMovement.X--;
}
if( inputState.IsPieceSelectionLeft( playerIndex ) ) {
cursorMovement.Y--;
}
if( inputState.IsPieceSelectionRight( playerIndex ) ) {
cursorMovement.Y++;
}
} else if( Math.Abs( degrees ) >= 135 ) {
if( inputState.IsPieceSelectionUp( playerIndex ) ) {
cursorMovement.Y++;
}
if( inputState.IsPieceSelectionDown( playerIndex ) ) {
cursorMovement.Y--;
}
if( inputState.IsPieceSelectionLeft( playerIndex ) ) {
cursorMovement.X++;
}
if( inputState.IsPieceSelectionRight( playerIndex ) ) {
cursorMovement.X--;
}
} else if( ( degrees > -135 ) && ( degrees <= -45 ) ) {
if( inputState.IsPieceSelectionUp( playerIndex ) ) {
cursorMovement.X--;
}
if( inputState.IsPieceSelectionDown( playerIndex ) ) {
cursorMovement.X++;
}
if( inputState.IsPieceSelectionLeft( playerIndex ) ) {
cursorMovement.Y++;
}
if( inputState.IsPieceSelectionRight( playerIndex ) ) {
cursorMovement.Y--;
}
}
// check for valid move and apply
if( board.IsValidSpace( cursorPosition.X + cursorMovement.X,
cursorPosition.Y + cursorMovement.Y ) ) {
cursorPosition.X += cursorMovement.X;
cursorPosition.Y += cursorMovement.Y;
}
// apply play-piece input
if( inputState.IsPlayPiece( playerIndex ) ) {
Move move = new Move( cursorPosition.X, cursorPosition.Y );
if( board.IsValidMove( BoardColor, move ) ) {
board.ApplyMove( BoardColor, move );
checkValidMove = true;
} else {
AudioManager.PlayCue( "Drop_Illegal" );
}
}
}
