public bool IsShortMove(IChessPiece chessPieceMoved, int finalColumnPosition, int finalRowPosition)
{
//Check if it actually moves
if (chessPieceMoved.Position.ColumnPosition == finalColumnPosition &&
chessPieceMoved.Position.RowPosition == finalRowPosition)
{
return(false);
}
ClosestChessPieceComparer closestChessPieceComparer = new ClosestChessPieceComparer(chessPieceMoved);
//Check distance between current location and destination
var distance = closestChessPieceComparer.FloatCompare(new King(0, finalColumnPosition, finalRowPosition), chessPieceMoved);
//Return false if distance of a move is bigger than 1 horizontal + 1 vertical = sqrt(1^2 + 1^2)
return(distance > Math.Sqrt(2) ? false : true);
}
public bool Verify(IChessPiece chessPieceMoved, int finalColumnPosition, int finalRowPosition, List <IChessPiece> chessPiecesList = null)
{
var closestPieceComparer = new ClosestChessPieceComparer(chessPieceMoved);
var moveDistance = closestPieceComparer.FloatCompare(new Knight(0, finalColumnPosition, finalRowPosition), chessPieceMoved);
if (moveDistance >= Math.Sqrt(8) || moveDistance <= 2f)
{
return(false);
}
if (chessPiecesList == null || chessPiecesList.Count < 1)
{
return(true);
}
IChessPiece pieceAtDestination = chessPiecesList.Where(cp => cp.Position.ColumnPosition == finalColumnPosition && cp.Position.RowPosition == finalRowPosition).FirstOrDefault();
if (pieceAtDestination == null)
{
return(true);
}
return(pieceAtDestination.Color != chessPieceMoved.Color);
}
private bool IsOtherPieceBlockingMove(IChessPiece chessPieceMoved,
int finalColumnPosition, int finalRowPosition,
List <IChessPiece> chessPiecesList)
{
//Check if there are pieces on board
if (chessPiecesList.Count < 1)
{
return(false);
}
//Filter all the ones not in the way
var PiecesInTheWay = chessPiecesList.Where(cp => IsBishopMovement(chessPieceMoved, cp.Position.ColumnPosition, cp.Position.RowPosition));
//Check for direction
//Check for vertical movement
if (chessPieceMoved.Position.RowPosition < finalRowPosition)
{
PiecesInTheWay = PiecesInTheWay.Where(cp => chessPieceMoved.Position.RowPosition < cp.Position.RowPosition);
}
else
{
PiecesInTheWay = PiecesInTheWay.Where(cp => chessPieceMoved.Position.RowPosition > cp.Position.RowPosition);
}
//Check for horizontal movement
if (chessPieceMoved.Position.ColumnPosition < finalColumnPosition)
{
PiecesInTheWay = PiecesInTheWay.Where(cp => chessPieceMoved.Position.ColumnPosition < cp.Position.ColumnPosition);
}
else
{
PiecesInTheWay = PiecesInTheWay.Where(cp => chessPieceMoved.Position.ColumnPosition > cp.Position.ColumnPosition);
}
//Check if any pieces remain
if (PiecesInTheWay.ToList().Count < 1)
{
return(false);
}
//Take first one
var closestPieceComparer = new ClosestChessPieceComparer(chessPieceMoved);
IChessPiece closestPieceInTheWay;
closestPieceInTheWay = PiecesInTheWay.OrderBy(cp => cp, closestPieceComparer).First();
var distanceBetweenDestinationAndClosets = closestPieceComparer.FloatCompare(new Bishop(0, finalColumnPosition, finalRowPosition), closestPieceInTheWay);
//Check if it blocks the move to final destination or is too far to interrupt movement
bool isPieceInTheWay = distanceBetweenDestinationAndClosets >= 0;
//Check if final destination and closest piece are on the same tile and different colors (Main piece tries to attack)
bool isMainAttacking = distanceBetweenDestinationAndClosets == 0 &&
closestPieceInTheWay.Color != chessPieceMoved.Color;
//If there is no piece in the way or main piece attacks the other allow move
if (!isPieceInTheWay || isMainAttacking)
{
return(false);
}
return(true);
}
private bool IsOtherPieceBlockingMove(IChessPiece chessPieceMoved,
int finalColumnPosition, int finalRowPosition,
List <IChessPiece> chessPiecesList)
{
//Check if there are other pieces on board
if (chessPiecesList.Count < 1)
{
return(false);
}
//Filter away all pieces that rook could not even touch
var PiecesInTheWay = chessPiecesList.Where(cp => IsRookMovement(chessPieceMoved, cp.Position.ColumnPosition, cp.Position.RowPosition));
//Check for direction of movement
RookMovementDirection?direction = null;
if (chessPieceMoved.Position.ColumnPosition < finalColumnPosition)
{
direction = RookMovementDirection.Right;
}
else if (chessPieceMoved.Position.ColumnPosition > finalColumnPosition)
{
direction = RookMovementDirection.Left;
}
else if (chessPieceMoved.Position.RowPosition < finalRowPosition)
{
direction = RookMovementDirection.Up;
}
else if (chessPieceMoved.Position.RowPosition > finalRowPosition)
{
direction = RookMovementDirection.Down;
}
switch (direction)
{
case RookMovementDirection.Up:
PiecesInTheWay = PiecesInTheWay.Where(cp => chessPieceMoved.Position.RowPosition < cp.Position.RowPosition);
break;
case RookMovementDirection.Right:
PiecesInTheWay = PiecesInTheWay.Where(cp => chessPieceMoved.Position.ColumnPosition < cp.Position.ColumnPosition);
break;
case RookMovementDirection.Down:
PiecesInTheWay = PiecesInTheWay.Where(cp => chessPieceMoved.Position.RowPosition > cp.Position.RowPosition);
break;
case RookMovementDirection.Left:
PiecesInTheWay = PiecesInTheWay.Where(cp => chessPieceMoved.Position.ColumnPosition > cp.Position.ColumnPosition);
break;
}
if (PiecesInTheWay.ToList().Count < 1)
{
return(false);
}
var closestPieceComparer = new ClosestChessPieceComparer(chessPieceMoved);
IChessPiece closestPieceInTheWay = PiecesInTheWay.OrderBy(cp => cp, closestPieceComparer).First();
var distanceBetweenDestinationAndClosets = closestPieceComparer.FloatCompare(new Rook(0, finalColumnPosition, finalRowPosition), closestPieceInTheWay);
//Check if it blocks the move to final destination or is too far to interrupt movement
bool isPieceInTheWay = distanceBetweenDestinationAndClosets >= 0;
//Check if final destination and closest piece are on the same tile and different colors (Main piece tries to attack)
bool isMainAttacking = distanceBetweenDestinationAndClosets == 0 &&
closestPieceInTheWay.Color != chessPieceMoved.Color;
//If there is no piece in the way or main piece attacks the other allow move
if (!isPieceInTheWay || isMainAttacking)
{
return(false);
}
return(true);
}