private IEnumerator PieceDown(GameObject changedPiece = null, bool checkValidity = false)
{
Vector3 piecePosition = pieceSelected.transform.localPosition;
Vector3 down = new Vector3(piecePosition.x, 0, piecePosition.z);
float time = 0;
while (time <= duration)
{
time += Time.deltaTime;
float blend = Mathf.Clamp01(time / duration);
pieceSelected.transform.localPosition = Vector3.Lerp(piecePosition, down, blend);
yield return(null);
}
// If the player changes the piece they want to move
if (changedPiece != null)
{
ChangePiece(changedPiece);
}
// Check if chosen position is valid
if (checkValidity)
{
pieceInformation.GetMoves();
pieceInformation.Moved();
}
pieceSelected.GetComponent <Rigidbody>().detectCollisions = true;
pieceSelected.GetComponent <Rigidbody>().isKinematic = false;
pieceSelected = null;
pieceInformation = null;
}
/// <summary>
/// Checks if at least one piece can block the path or eliminate the piece checking the king - if in check
/// Or
/// Checks to see if the opponent can play a move - for stalemate condition
/// </summary>
/// <returns> True if checkmate/stalemate </returns>
static bool CheckmateStalemate(int colour, BoardInformation boardInfo)
{
foreach (GameObject pieceOnBoard in boardInfo.GetPieceAvailable())
{
PieceInformation pieceOnBoardInfo = pieceOnBoard.GetComponent <PieceInformation>();
// skip if not opponent's piece
if ((int)pieceOnBoardInfo.colour == colour)
{
continue;
}
pieceOnBoardInfo.GetMoves();
List <string> allowedPositions = pieceOnBoardInfo.GetPossibleMoves();
// Break out early if at least one piece can be moved
if (allowedPositions.Count != 0)
{
string spots = "";
for (int i = 0; i < allowedPositions.Count; i++)
{
spots += allowedPositions[i] + " ";
}
return(false);
}
}
return(true);
}
/// <summary>
/// Highlights tiles that this piece can move to
/// Used by Interactable script events
/// </summary>
public void TilesOn()
{
//Look for possible moves
pi.GetMoves();
possibleMoves = pi.GetPossibleMoves();
if (possibleMoves == null || bi.GetTurn() != (int)pi.colour)
{
return;
}
//Swap the corresponding tiles with highlighted version
foreach (string item in possibleMoves)
{
int x = (int)char.GetNumericValue(item[0]);
int z = (int)char.GetNumericValue(item[2]);
GameObject tile = chessboard.transform.GetChild(z).gameObject.transform.GetChild(x).gameObject;
activeTiles.Add(tile);
tile.GetComponent <ActivateHighlight>().HighlightOn();
}
}
