/// <summary>
/// Returns the set of points to reverse in a given direction.
/// </summary>
/// <remarks>
/// Returns the consecutive set of discs from the current point
/// to the next same colored point in the given direction.
/// </remarks>
/// <param name="board">The game board</param>
/// <param name="point">The point of the new disc</param>
/// <param name="direction">The direction to scan in</param>
/// <param name="currentPlayer">The current player's color</param>
/// <returns></returns>
public static ISet<Point> ReversedToNext(Disc[,] board, Point point, Point direction, Disc currentPlayer)
{
HashSet<Point> points = new HashSet<Point>();
point += direction;
if (!board.OnBoard(point))
return points;
Disc currentDisc;
for (currentDisc = board.At(point);
currentDisc == currentPlayer.Reversed() && board.OnBoard(point + direction);
point += direction, currentDisc = board.At(point))
points.Add(point);
if (currentDisc.IsEmpty() ||
!board.OnBoard(point + direction) && currentDisc != currentPlayer)
points.Clear();
return points;
}