public MoveCollection TransformMoves(CubeOrientation orientation)
{
MoveCollection newMoves = new MoveCollection();
for (IEnumerator <Move> e = GetEnumerator(); e.MoveNext();)
{
Move m = e.Current;
newMoves.Add(orientation.TransformFace(m.Face), m.Count);
}
return(newMoves);
}
public MoveCollection Parse(string moveString)
{
MoveCollection moves = new MoveCollection();
for (int i = 0; i < moveString.Length; i++)
{
char moveChar = moveString[i];
string postfix = new string(moveString.Skip(i + 1).TakeWhile(c =>
!faceMappings.Contains(c) && !orientationMoveChars.Contains(c)).ToArray());
i += postfix.Length;
// get rotations count ('i' = -1, '2' = 2, '' = 1)
int count = postfix.EndsWith("i") ? -1 : (postfix.EndsWith("2") ? 2 : 1);
// normal face move
if (faceMappings.Contains(moveChar))
{
CubeFace face = cubeOrientation[Array.IndexOf(faceMappings, moveChar)];
// W move
if (postfix.StartsWith("w"))
{
switch (face)
{
// Lw
case CubeFace.LEFT: ChangeOrientation(OrientationMove.X, -count); break;
// Uw
case CubeFace.UP: ChangeOrientation(OrientationMove.Y, count); break;
// Fw
case CubeFace.FRONT: ChangeOrientation(OrientationMove.Z, count); break;
// Dw
case CubeFace.DOWN: ChangeOrientation(OrientationMove.Y, -count); break;
// Rw
case CubeFace.RIGHT: ChangeOrientation(OrientationMove.X, count); break;
// Bw
case CubeFace.BACK: ChangeOrientation(OrientationMove.Z, -count); break;
default:
throw new InvalidProgramException();
}
face = GetOpponentFace(face);
}
moves.Add(face, count);
}
// orientation move
else if (orientationMoveChars.Contains(moveChar))
{
switch (char.ToLower(moveChar))
{
case 'x': ChangeOrientation(OrientationMove.X, count); break;
case 'y': ChangeOrientation(OrientationMove.Y, count); break;
case 'z': ChangeOrientation(OrientationMove.Z, count); break;
default: throw new InvalidProgramException();
}
}
else
{
throw new FormatException($"Cannot parse orientation move \'{moveChar + postfix}\'");
}
}
return(moves);
}