/// <summary>The <c>Hexside</c> corresponding to this <c>HexsideFlag</c>, or -1 if it doesn't exist.</summary>
public static Hexside IndexOf(this HexsideFlags @this)
{
return((Hexside)HexsideFlags.IndexOf(@this));
}
/// <summary>TODO</summary>
/// <param name="this"></param>
/// <param name="directions"></param>
/// <returns></returns>
public static IEnumerable <NeighbourHex> GetNeighbourHexes(this IHex @this, HexsideFlags directions)
{
return(from n in @this.GetNeighbourHexes()
where directions.HasFlag(n.HexsideEntry.Direction()) && n.Hex.IsOnboard()
select n);
}
/// <summary>TODO</summary>
public NeighbourHex(IHex hex, HexsideFlags hexside) : this(hex, hexside.IndexOf())
{
}
///<summary>Returns set of hexes at direction(s) specified by <c>hexsides</c>, as IEnumerable.</summary>
public IEnumerable <NeighbourCoords> GetNeighbours(HexsideFlags hexsides)
{
return(GetNeighbours().Where(n => hexsides.HasFlag(n.Hexside)));
}