public bool IsCheck()
{
int[] straightDx = { 0, 1, 1, 1, 0, -1, -1, -1 };
int[] straightDy = { 1, 1, 0, -1, -1, -1, 0, 1 };
int[] knightDx = { 1, 2, 2, 1, -1, -2, -2, -1 };
int[] knightDy = { 2, 1, -1, -2, -2, -1, 1, 2 };
int[] pawnDx = { -1, 1 };
int[] pawnDy = { (int)Team, (int)Team };
Board.PieceGetter getFirstPieceOnPath = new Board.PieceGetter(board.GetFirstPieceOnPath);
Board.PieceGetter getPieceAtPoint = new Board.PieceGetter(board.GetPieceAtPoint);
return(_IsCheck(straightDx, straightDy, getFirstPieceOnPath) ||
_IsCheck(knightDx, knightDy, getPieceAtPoint) ||
_IsCheck(pawnDx, pawnDy, getPieceAtPoint));
}
private bool _IsCheck(int[] dx, int[] dy, Board.PieceGetter GetPiece)
{
for (int i = 0; i < dx.Length; i++)
{
Point delta = new Point(dx[i], dy[i]);
ImmutablePiece piece = GetPiece(king.CurrentPoint, delta);
if (piece == null || king.IsFriendly(piece))
{
continue;
}
if (piece.CanMoveTo(king.CurrentPoint, board))
{
return(true);
}
}
return(false);
}