public override List <Position> GetPossiblePositions(IDirection direction)
{
var possibleOutcomes = new List <Position>();
possibleOutcomes.AddRange(direction.GetEastPositions(CurrentPosition, Constants.ChessBoardUpperLimit));
possibleOutcomes.AddRange(direction.GetWestPositions(CurrentPosition, Constants.ChessBoardUpperLimit));
possibleOutcomes.AddRange(direction.GetNorthPositions(CurrentPosition, Constants.ChessBoardUpperLimit));
possibleOutcomes.AddRange(direction.GetSouthPositions(CurrentPosition, Constants.ChessBoardUpperLimit));
return(possibleOutcomes);
}
/// <summary>
/// This gives possible movements of King.
/// King can move only 1 step at a time in all 8 directions (horizontal, vertical and diagonal)
/// </summary>
/// <param name="initialPosition"></param>
/// <returns></returns>
public override List <Position> GetPossiblePositions(IDirection direction)
{
var possibleOutcomes = new List <Position>();
possibleOutcomes.AddRange(direction.GetEastPositions(CurrentPosition, 1));
possibleOutcomes.AddRange(direction.GetWestPositions(CurrentPosition, 1));
possibleOutcomes.AddRange(direction.GetNorthPositions(CurrentPosition, 1));
possibleOutcomes.AddRange(direction.GetSouthPositions(CurrentPosition, 1));
possibleOutcomes.AddRange(direction.GetNorthEastPositions(CurrentPosition, 1));
possibleOutcomes.AddRange(direction.GetNorthWestPositions(CurrentPosition, 1));
possibleOutcomes.AddRange(direction.GetSouthEastPositions(CurrentPosition, 1));
possibleOutcomes.AddRange(direction.GetSouthWestPositions(CurrentPosition, 1));
return(possibleOutcomes);
}
/// <summary>
///To calculate the horizontal movements of a horse, we need to go 2 cells north and south.
///For the valid vertical 2 cell movements, we can then go horizontal as a half location.
/// </summary>
/// <returns></returns>
private List <Position> GetHorizontalTwoAndHalfMovements(IDirection direction)
{
var verticalPositions = new List <Position>();
var northIndex = CurrentPosition.Row + 2;
if (northIndex.IsValidMovement() == true)
{
verticalPositions.Add(new Position(northIndex, CurrentPosition.Column));
}
var southIndex = CurrentPosition.Row - 2;
if (southIndex.IsValidMovement() == true)
{
verticalPositions.Add(new Position(southIndex, CurrentPosition.Column));
}
var horizontalMovements = new List <Position>();
verticalPositions.ForEach(x =>
{
horizontalMovements.AddRange(direction.GetEastPositions(x, 1));
horizontalMovements.AddRange(direction.GetWestPositions(x, 1));
});
return(horizontalMovements);
}
