public static PathSet GetPathSet(ShapeOrientationCollection pieceDefinition)
{
var pieceLookup = pieceDefinition.ToString();
if (!_pieceMoves.ContainsKey(pieceLookup))
{
_pieceMoves[pieceLookup] = new PathSet(PathGenerator(pieceDefinition).ToArray());
}
return(_pieceMoves[pieceLookup].DeepClone());
}
public static IEnumerable <Orientation> GetUniqueOrientations(ShapeOrientationCollection pieceDefinition)
{
yield return(Orientation.Original);
for (var targetOrientation = Orientation.Flip; targetOrientation <= Orientation.LeftFlip; targetOrientation++)
{
var targetRotation = Piece.GetRotation(Orientation.Original, targetOrientation);
//For each adjusted orientation I'll try to map oriented paths to
//original paths and see if the orientation is equivalent or not.
var originalPathSet = MoveGenerator.GetPathSet(pieceDefinition);
var adjustedShape = new ShapeOrientationCollection(pieceDefinition.Select(so => new ShapeOrientation(so.Shape, Piece.RotateOrientation(so.Orientation, targetRotation))).ToArray(), true);
var adjustedPathSet = MoveGenerator.GetPathSet(adjustedShape);
var mismatch = false;
while (originalPathSet.Count > 0 && adjustedPathSet.Count > 0)
{
var nextVector = originalPathSet.Keys.First();
var nextVectorPaths = originalPathSet[nextVector];
if (!adjustedPathSet.ContainsKey(nextVector))
{
yield return(targetOrientation);
break;
}
var adjustedVectorPaths = adjustedPathSet[nextVector];
if (nextVectorPaths.Count != adjustedVectorPaths.Count)
{
mismatch = true;
}
else
{
foreach (var path in nextVectorPaths.Keys)
{
if (!adjustedVectorPaths.Any(x => x.Key.ToString() == path.ToString()))
{
mismatch = true;
break;
}
}
}
if (mismatch)
{
yield return(targetOrientation);
break;
}
originalPathSet.Remove(nextVector);
adjustedPathSet.Remove(nextVector);
}
}
}
private static IEnumerable <MovementPath> PathGenerator(ShapeOrientationCollection pieceDefinition)
{
foreach (var shapeOrientationSequence in PermuteShapeOrientations(pieceDefinition).ToArray())
{
var indices = shapeOrientationSequence.Select(i => 0).ToList();
indices[0] = -1;
var pieces = shapeOrientationSequence.Select(so => Piece.OrientVectors(Piece.GetNonOrientedVectors(so.Shape), so.Orientation).ToList()).ToList();
while (IncrementIndexList(indices, pieces))
{
yield return(new MovementPath(pieces.Select((piece, idx) => piece[indices[idx]]).ToArray()));
}
}
}
public Piece(Side owner, int stackLimit, params ShapeOrientation[] shapes)
{
Owner = owner;
StackLimit = stackLimit;
Shapes = new ShapeOrientationCollection(shapes, true);
}
public Piece(Side owner, int stackLimit, ShapeOrientationCollection shapes)
{
Owner = owner;
StackLimit = stackLimit;
Shapes = shapes;
}