private static PuzzlePiece.Border GetFlippedBorder(PuzzlePiece.Border border)
{
if (border == PuzzlePiece.Border.None)
{
return(border);
}
var id = (int)border > 3 ? (int)border - 4 : (int)border + 4;
return((PuzzlePiece.Border)id);
}
private static PuzzlePiece FindConnectingPieceByOneSideAndPlaceInCorrectPosition(IEnumerable <PuzzlePiece> piecesLeft, PuzzlePiece.Border borderToMatch, short idToMatch)
{
var connectingPiece = piecesLeft.Single(p => p.BorderIds.Contains(idToMatch));
var flippedBorderToMatch = GetFlippedBorder(borderToMatch);
while (connectingPiece.GetBorderId(borderToMatch) != idToMatch && connectingPiece.GetBorderId(flippedBorderToMatch) != idToMatch)
{
connectingPiece.RotateRight();
}
if (connectingPiece.GetBorderId(borderToMatch) != idToMatch)
{
if (borderToMatch == PuzzlePiece.Border.Left || borderToMatch == PuzzlePiece.Border.Right)
{
connectingPiece.MirrorVertical();
}
else
{
connectingPiece.MirrorHorizontal();
}
}
return(connectingPiece);
}
