// Place(): place a base on a cell
void Place(BasePiece piece, Cell targetCell)
{
// no need to clear when placing piece on board for the first time
if (piece.GetCurrentCell())
{
piece.GetCurrentCell().ClearCurrentPiece();
}
piece.ClearCurrentCell();
piece.transform.position = targetCell.transform.position;
piece.SetCurrentCell(targetCell);
targetCell.SetCurrentPiece(piece);
}
///////////////////////////////////////
//
#region Private Methods
//
///////////////////////////////////////
// ShowMoves(): given a BasePiece and Position, display available moves
void ShowMoves(BasePiece piece)
{
Debug.Log("PieceManager::ShowMoves()");
// highlight original position
mBoard.HighlightCell(piece.GetCurrentCell().GetBoardPosition(), piece.GetTeamColor(), false);
// highlight available moves
List <Vector2Int> allMovePositions = GetAllMovePositions(piece);
mBoard.HighlightCells(allMovePositions, piece.GetTeamColor(), true);
}
// Kill():
void Kill(BasePiece piece)
{
Debug.Log("PieceManager::Kill() " + piece);
// clean up cell reference
if (piece.GetCurrentCell())
{
piece.GetCurrentCell().ClearCurrentPiece();
}
// clean up base piece reference
piece.ClearCurrentCell();
// Don't destory them, because we can reuse them for the next game -> deactivate instead
// Destroy(piece.gameObject);
piece.gameObject.SetActive(false);
// game is over when king is killed
if (piece is King)
{
GameManager.Instance.GameOver();
}
}
// GetAllMovePositions(): given a BasePiece and a Cell, return list of all available move positions
List <Vector2Int> GetAllMovePositions(BasePiece piece)
{
List <Vector2Int> result = new List <Vector2Int>();
Cell currentCell = piece.GetCurrentCell();
for (int i = 0; i < piece.GetMoveNum(); ++i)
{
List <Vector2Int> moveCellPositions = GetMovePositions(piece.GetMoveTypes()[i], piece.GetMoveSteps()[i],
currentCell, piece.GetFrontDirection());
moveCellPositions.ForEach(position => result.Add(position));
}
return(result);
}
// DoEndDrag(): Move cells to target cells or return to original position!
public void DoEndDrag(BasePiece piece, PointerEventData eventData)
{
Debug.Log("PieceManager::DoEndDrag()");
// Unhighlight previous available moves
mBoard.UnHighlightCells();
if (targetCell)
{
Move(piece, targetCell);
}
else
{
// Return to original cell
Place(piece, piece.GetCurrentCell());
}
}
// Move(): move is an attempt! only place if target cell state is empty or enemy
void Move(BasePiece piece, Cell targetCell)
{
Cell.CellState targetCellState = Cell.InquireCellState(piece, targetCell);
if (targetCellState == Cell.CellState.Empty)
{
Debug.Log("target cell state is: " + targetCellState);
// Highlight path to target cell
Vector2Int origPosition = piece.GetCurrentCell().GetBoardPosition();
Vector2Int targetPosition = targetCell.GetBoardPosition();
List <Vector2Int> pathPositions = GetPathPositions(origPosition, targetPosition);
Color teamColor = piece.GetTeamColor();
mBoard.HighlightCells(pathPositions, teamColor, false);
// Move to empty cell
Place(piece, targetCell);
if (piece is Pawn)
{
Pawn pawnPiece = (Pawn)piece;
pawnPiece.SetFirstMove(false);
}
// Verify if enemy king in check
VerifyKingInCheck(piece);
GameManager.Instance.NextTurn();
}
else if (targetCellState == Cell.CellState.Friend)
{
Debug.Log("target cell state is: " + targetCellState);
// Return to original cell
Place(piece, piece.GetCurrentCell());
}
else if (targetCellState == Cell.CellState.Enemy)
{
Debug.Log("target cell state is: " + targetCellState);
// Highlight path to target cell
Vector2Int origPosition = piece.GetCurrentCell().GetBoardPosition();
Vector2Int targetPosition = targetCell.GetBoardPosition();
List <Vector2Int> pathPositions = GetPathPositions(origPosition, targetPosition);
Color teamColor = piece.GetTeamColor();
mBoard.HighlightCells(pathPositions, teamColor, false);
// Maybe not a good idea... looks kinda confusing...
// // highlight piece to be captured
// mBoard.HighlightCell(targetPosition, targetCell.GetCurrentPiece().GetTeamColor());
// Capture
Kill(targetCell.GetCurrentPiece());
// Move to empty cell
Place(piece, targetCell);
if (piece is Pawn)
{
Pawn pawnPiece = (Pawn)piece;
pawnPiece.SetFirstMove(false);
}
// Verify if enemy king in check
VerifyKingInCheck(piece);
GameManager.Instance.NextTurn();
}
}
