public override bool Movable(IPosition iSource, IPosition iTarget, IPieceColorMap iPieceColorMap)
{
// if the target has a piece of the same side, not movable
if (iPieceColorMap.PieceColorMap[iTarget.Row, iTarget.Column] == this.Color)
{
return(false);
}
bool movable = true;
if (!(
(iTarget.Row == iSource.Row - 1 && iTarget.Column == iSource.Column - 2) ||
(iTarget.Row == iSource.Row - 1 && iTarget.Column == iSource.Column + 2) ||
(iTarget.Row == iSource.Row - 2 && iTarget.Column == iSource.Column - 1) ||
(iTarget.Row == iSource.Row - 2 && iTarget.Column == iSource.Column + 1) ||
(iTarget.Row == iSource.Row + 1 && iTarget.Column == iSource.Column - 2) ||
(iTarget.Row == iSource.Row + 1 && iTarget.Column == iSource.Column + 2) ||
(iTarget.Row == iSource.Row + 2 && iTarget.Column == iSource.Column - 1) ||
(iTarget.Row == iSource.Row + 2 && iTarget.Column == iSource.Column + 1)
))
{
movable = false;
}
return(movable);
}
public override bool Movable(IPosition iSource, IPosition iTarget, IPieceColorMap iPieceColorMap)
{
// if the target has a piece of the same side, not movable
if (iPieceColorMap.PieceColorMap[iTarget.Row, iTarget.Column] == this.Color)
{
return(false);
}
bool movable = true;
// if the target is not at the same row or same column as the source,
// return false
if (iTarget.Row != iSource.Row && iTarget.Column != iSource.Column)
{
movable = false;
}
else if (iTarget.Row == iSource.Row && iTarget.Column != iSource.Column)
{
// moving horizontally
// check if there is a piece in between source and target
int low = iSource.Column < iTarget.Column ? iSource.Column : iTarget.Column;
int high = iSource.Column > iTarget.Column ? iSource.Column : iTarget.Column;
bool pieceInBetween = false;
for (int i = low + 1; i <= high - 1; i++)
{
if (iPieceColorMap.PieceColorMap[iTarget.Row, i] != PIECE_COLOR.Empty)
{
pieceInBetween = true;
break;
}
}
if (pieceInBetween == true)
{
movable = false;
}
}
else if (iTarget.Row != iSource.Row && iTarget.Column == iSource.Column)
{
// moving vertically
// check if there is a piece in between source and target
int low = iSource.Row < iTarget.Row ? iSource.Row : iTarget.Row;
int high = iSource.Row > iTarget.Row ? iSource.Row : iTarget.Row;
bool pieceInBetween = false;
for (int i = low + 1; i <= high - 1; i++)
{
if (iPieceColorMap.PieceColorMap[i, iSource.Column] != PIECE_COLOR.Empty)
{
pieceInBetween = true;
break;
}
}
if (pieceInBetween == true)
{
movable = false;
}
}
return(movable);
}
public override bool Movable(IPosition iSource, IPosition iTarget, IPieceColorMap iPieceColorMap)
{
bool movable = true;
if (iTarget.Column == iSource.Column)
{
if (iTarget.Row == iSource.Row + _direction)
{
if (iPieceColorMap.PieceColorMap[iTarget.Row, iTarget.Column] != PIECE_COLOR.Empty)
{
movable = false;
} // else nothing to do
}
else if (iTarget.Row == iSource.Row + 2 * _direction)
{
if (_firstMove)
{
if (
iPieceColorMap.PieceColorMap[iSource.Row + _direction, iSource.Column] != PIECE_COLOR.Empty ||
iPieceColorMap.PieceColorMap[iSource.Row + 2 * _direction, iSource.Column] != PIECE_COLOR.Empty)
{
movable = false;
} // else nothing to do
}
else
{
movable = false;
}
}
else
{
movable = false;
}
}
else if (
iTarget.Column == iSource.Column + 1 ||
iTarget.Column == iSource.Column - 1)
{
// moving diagonally
if (iPieceColorMap.PieceColorMap[iTarget.Row, iTarget.Column] == this.Color ||
iPieceColorMap.PieceColorMap[iTarget.Row, iTarget.Column] == PIECE_COLOR.Empty)
{
// capture only
movable = false;
} // else nothing to do
}
else
{
movable = false;
}
return(movable);
}
public override bool Movable(IPosition iSource, IPosition iTarget, IPieceColorMap iPieceColorMap)
{
// if the target has a piece of the same side, not movable
if (iPieceColorMap.PieceColorMap[iTarget.Row, iTarget.Column] == this.Color)
{
return(false);
}
bool movable = true;
// if the target is not in diagonal,
// return
if (Math.Abs(iTarget.Row - iSource.Row) != Math.Abs(iTarget.Column - iSource.Column))
{
movable = false;
}
else
{
int distance = Math.Abs(iTarget.Row - iSource.Row);
int dr = (iTarget.Row - iSource.Row) > 0 ? 1 : -1;
int dc = (iTarget.Column - iSource.Column) > 0 ? 1 : -1;
// check if there is a piece in between source and target
bool pieceInBetween = false;
for (int i = 1; i < distance - 1; i++)
{
if (iPieceColorMap.PieceColorMap[iSource.Row + i * dr, iSource.Column + i * dc] != PIECE_COLOR.Empty)
{
pieceInBetween = true;
break;
}
}
if (pieceInBetween == true)
{
movable = false;
}
}
return(movable);
}
public override bool Movable(IPosition iSource, IPosition iTarget, IPieceColorMap iPieceColorMap)
{
throw new NotImplementedException();
}
