/// <summary>
/// Function handles the updating of checkers piece.
/// This function is called whenever a successful move is done.
/// This function will update the piece's position on the board, and change who's turn it is.
/// </summary>
/// <param name="gameState">The gamestate to update</param>
public void Update(CheckersGameState gameState)
{
if (destination != Vector2.Zero)
{
position = destination;
destination = Vector2.Zero;
if (gameState.turnColor == PieceColor.Black)
{
gameState.changePlayerTurn(PieceColor.White);
}
else
{
gameState.changePlayerTurn(PieceColor.Black);
}
}
}
/// <summary>
/// Update function that is called periodically by the game engine
/// </summary>
/// <param name="main">Main driver for the game</param>
/// <param name="gameTime">Gametime recieved by the main</param>
public void Update(CheckersMain main, GameTime gameTime)
{
//Below handles the animated marking of the active game piece
if (currentState.activeGamePiece != null)
{
if (currentState.activeGamePiece.rotation - CheckersPiece.ROTATION_SPEED * MathHelper.TwoPi < 0)
{
currentState.activeGamePiece.rotation -= CheckersPiece.ROTATION_SPEED * MathHelper.TwoPi + MathHelper.TwoPi;
}
else
{
currentState.activeGamePiece.rotation -= CheckersPiece.ROTATION_SPEED * MathHelper.TwoPi;
}
}
//Below sets the first player in the game to black when a game is started
if (currentState.turnColor == PieceColor.None && currentState.blackGamePieces.Count > 0)
{
currentState.changePlayerTurn(PieceColor.Black);
}
//Below takes care of running alpha-beta when it is the computer's turn,
//and doing the best move selected by the algorithm
if (currentState.turnColor == currentState.aiColor && currentState.winner == PieceColor.None)
{
if (aiThread == null)
{
aiThread = new Thread(doAiMove);
aiThread.Start();
}
}
//If this case is reached, it means that it was the player's turn, and any mouse events should be processed
else
{
int mouseX = Mouse.GetState().X;
int mouseY = Mouse.GetState().Y;
//Handle mouse events for the game only if it's not minimized
if (Mouse.GetState().LeftButton == ButtonState.Pressed && isMousePressed == false && main.IsActive)
{
isMousePressed = true;
handleMouseAction(mouseX, mouseY);
}
//Handle mouse events for the game only if it's not minimized
if (Mouse.GetState().LeftButton == ButtonState.Released && main.IsActive)
{
isMousePressed = false;
}
}
//If the computer finishes (thread is sleeping) join the two threads and set the thread back to null
if (aiThread != null)
{
if (aiThread.IsAlive == false)
{
aiThread.Join();
aiThread = null;
}
}
}