public PieceI()
{
units[0] = new PentominoePuzzleUnit(0, -1, -1, -1, -1, -1, 1, -1, -1);
units[1] = new PentominoePuzzleUnit(1, 0, -1, -1, -1, -1, 2, -1, -1);
units[2] = new PentominoePuzzleUnit(2, 1, -1, -1, -1, -1, 3, -1, -1);
units[3] = new PentominoePuzzleUnit(3, 2, -1, -1, -1, -1, 4, -1, -1);
units[4] = new PentominoePuzzleUnit(4, 3, -1, -1, -1, -1, -1, -1, -1);
}
//TODO.. needs to ignore units already placed. need additional param
private bool DoesUnitPieceCoverLocation(IPentominoePuzzlePiece piece, int unitNumber, int xIndex, int yIndex, HashSet <int> unitsPlaced)
{
PentominoeGameBoardLocation location;
if (unitsPlaced != null && unitsPlaced.Count == 5)
{
return(true);
}
//ensure x,y locaiton on the game board and not covered.
if (xIndex < 0 || yIndex < 0 || xIndex >= boardWidth || yIndex >= boardHeight)
{
Trace.WriteLine(piece.pieceName() + " unit " + unitNumber + "DOES NOT fit at location " + xIndex + " , " + yIndex + "OUT OF BOUNDS");
return(false);
}
location = gameBoard[xIndex, yIndex];
if (location.Covered)
{
Trace.WriteLine(piece.pieceName() + " unit " + unitNumber + "DOES NOT fit at location " + xIndex + " , " + yIndex + "ALREADY COVERED");
return(false);
}
if (unitsPlaced == null)
{
unitsPlaced = new HashSet <int>();
}
unitsPlaced.Add(unitNumber);
bool ret = true;
PentominoePuzzleUnit unitSquare = piece.getUnits()[unitNumber];
foreach (AdjacentLocation loc in unitSquare.adjacentLocations)
{
if (loc.Covered && !unitsPlaced.Contains(loc.UnitNumber)) //not every adjacent location is covered
{
ret = DoesUnitPieceCoverLocation(piece, loc.UnitNumber, xIndex + loc.Xoffset, yIndex + loc.Yoffset, unitsPlaced);
if (!ret)
{
break;
}
}
}
Trace.WriteLine(piece.pieceName() + " unit " + unitNumber + " fits " + ret + " at location " + xIndex + " , " + yIndex);
return(ret);
}
