private Hexside(int value, string name, Hexsides hexsides)
{
AsHexsides = hexsides;
Name = name;
Value = value;
_reversed = (Value + 3) % 6;
}
/// <summary>TODO</summary>
public static Hexsides ValidBitsMask(this Hexsides @this)
{
const Hexsides HexsidesMask = Hexsides.North | Hexsides.Northeast | Hexsides.Southeast
| Hexsides.South | Hexsides.Southwest | Hexsides.Northwest;
return(@this &= HexsidesMask);
}
/// <summary>Tests (without boxing) if all flags are clear.</summary>
public static bool IsAnySet(this Hexsides @this, Hexsides testBits)
{
if (@this == 0)
{
throw new ArgumentOutOfRangeException("this"); //"Value must not be 0.");
}
return((@this & testBits) != 0);
}
/// <summary>Tests (without boxing) if all flags are clear.</summary>
public static bool AreAllClear(this Hexsides @this, Hexsides testBits)
{
if (@this == 0)
{
throw new ArgumentOutOfRangeException("this"); //,"Value must not be 0.");
}
return((@this & testBits) == 0);
}
/// <summary>Performs action for all bits set in this.</summary>
public static void ForEach(this Hexsides @this, Action <Hexsides> action)
{
if (action == null)
{
throw new ArgumentNullException("action");
}
for (UInt32 bit = 1; bit != 0; bit <<= 1)
{
var flag = (Hexsides)bit;
if (@this.IsAnySet(flag))
{
action(flag);
}
}
}
/// <summary>Clears the bits clearBits in this.</summary>
public static Hexsides ClearBits(this Hexsides @this, Hexsides bits)
{
return(@this & ~bits);
}
/// <summary>Returns the count of of set bit-flags in the argument.</summary>
/// <param name="this"></param>
public static int BitCount(this Hexsides @this)
{
return(LookupTable[(int)@this]);
}
/// <summary>Returns set of hexes at direction(s) specified by <c>hexsides</c>, as IEnumerable.</summary>
public IEnumerable <NeighbourCoords> GetNeighbours(Hexsides hexsides)
{
return(GetNeighbours().Where(n => hexsides.HasFlag(n.Hexside)));
}
/// <summary>Returns the result of clearing all invalid bits in <c>this</c>.</summary>
public static Hexsides ValidBitsMask(this Hexsides @this) { return @this &= Hexsides.All; }
/// <summary>Sets specified bits in this.</summary> public static Hexsides SetBits(this Hexsides @this, Hexsides bits) => (@this | bits).ValidBitsMask();
/// <summary>Clears specified bits in this.</summary> public static Hexsides ClearBits(this Hexsides @this, Hexsides bits) => (@this & ~bits).ValidBitsMask();
/// <summary>Tests (without boxing) if any requested bit is set.</summary>
public static bool IsAnySet(this Hexsides @this, Hexsides testBits) {
if (@this == 0) throw new ArgumentOutOfRangeException("this","Value must not be 0.");
return (@this & testBits).ValidBitsMask() != 0;
}
/// <summary>TODO</summary>
public static int GetValue(this Hexsides @this) { return (int)@this.ValidBitsMask(); }
/// <summary>Returns true exactly if <c>this</c> has the the eponymous bit from <c>hexside</c> set.</summary> /// <param name="this">The Hexsides value to test.</param> /// <param name="hexside">Specification of the eponymous bit in <c>this</c> to test.</param> public static bool IsSet(this Hexsides @this, Hexside hexside) => (@this.GetValue() & ((int)hexside.AsHexsides)) != 0;
/// <summary>The <c>Hexside</c> corresponding to this <c>Hexside</c> bit, or -1 if it doesn't exist.</summary>
public static Hexside IndexOf(this Hexsides @this)
{
return((Hexside)HexsideBits.IndexOf(@this));
}
/// <summary>Sets the bits setBits in this.</summary>
public static Hexsides SetBits(this Hexsides @this, Hexsides bits)
{
return(@this | bits);
}
/// <summary>Returns the count of of set bit-flags in the argument.</summary> /// <param name="this">The Hexsides instnace of interest.</param> public static int BitCount(this Hexsides @this) => BitCountLookup[(int)@this];
/// <summary>TODO</summary>
public NeighbourHex(IHex hex, Hexsides hexside) : this(hex, hexside.IndexOf())
{
}
