private IEnumerable <Combination> EnumerateVariations(Combination Combination)
{
yield return(Combination);
// Switch base and overlay
yield return(new Combination
{
BasePiece = Combination.OverlayPiece,
OverlayPiece = Combination.BasePiece,
OverlayRelativeOrientation = OrientationHelper.Relative(Combination.OverlayRelativeOrientation, PieceOrientation.North),
Result = Combination.Result,
ResultRelativeOrientation = OrientationHelper.Relative(Combination.OverlayRelativeOrientation, Combination.ResultRelativeOrientation)
});
// Result with Base laid over it
yield return(new Combination
{
BasePiece = Combination.Result,
OverlayPiece = Combination.BasePiece,
OverlayRelativeOrientation = OrientationHelper.Relative(Combination.ResultRelativeOrientation, PieceOrientation.North),
Result = Combination.Result,
ResultRelativeOrientation = PieceOrientation.North
});
// Result with overlay laid over it
yield return(new Combination
{
BasePiece = Combination.Result,
OverlayPiece = Combination.OverlayPiece,
OverlayRelativeOrientation = OrientationHelper.Relative(Combination.ResultRelativeOrientation, Combination.OverlayRelativeOrientation),
Result = Combination.Result,
ResultRelativeOrientation = PieceOrientation.North
});
}
public JunctionPattern Rotate()
{
return(new JunctionPattern
{
Pieces = Pieces.Select(piece =>
new JunctionPiece
{
Offset = new Point(piece.Offset.Y, -piece.Offset.X),
RailPiece = piece.RailPiece,
Orientation = OrientationHelper.Rotate(piece.Orientation, 1)
}
).ToList(),
Entrance = Entrance == null ? null :
new JunctionPortal
{
Offset = new Point(Entrance.Offset.Y, -Entrance.Offset.X),
Direction = OrientationHelper.Rotate(Entrance.Direction, 1)
},
Exit = Exit == null ? null :
new JunctionPortal
{
Offset = new Point(Exit.Offset.Y, -Exit.Offset.X),
Direction = OrientationHelper.Rotate(Exit.Direction, 1)
},
});
}
public JunctionPattern Rotate()
{
return(new JunctionPattern
{
Pieces = Pieces.Select(piece =>
new JunctionPiece
{
Offset = new Point(piece.Offset.Y, -piece.Offset.X),
RailPiece = piece.RailPiece,
Orientation = OrientationHelper.Rotate(piece.Orientation, 1)
}
).ToList()
});
}