public MiniBoard(MiniBoard board)
{
this.rows = board.rows;
this.cols = board.cols;
this.b1 = board.b1;
this.b2 = board.b2;
}
public BFSNode MoveDown(int partition)
{
MiniBoard b = new MiniBoard(board);
int index = (empty_row * db.cols) + empty_col;
UInt64 tile = b.Get(index + db.cols); b.Set(index + db.cols, b.Get(index)); b.Set(index, tile);
int dist = distance + ((db.partitioning[tile] == partition) ? 1 : 0);
return(new BFSNode(db, b, empty_row + 1, empty_col, dist, Direction.DOWN));
}
public BFSNode MoveLeft(int partition)
{
MiniBoard b = new MiniBoard(board);
int index = (empty_row * db.cols) + empty_col;
UInt64 tile = b.Get(index - 1); b.Set(index - 1, b.Get(index)); b.Set(index, tile);
int dist = distance + ((db.partitioning[tile] == partition) ? 1 : 0);
return(new BFSNode(db, b, empty_row, empty_col - 1, dist, Direction.LEFT));
}
private BFSNode(PatternDatabase db, MiniBoard board, int empty_row, int empty_col, int distance, Direction direction)
{
this.db = db;
this.empty_row = empty_row;
this.empty_col = empty_col;
this.board = board;
this.distance = distance;
this.direction = direction;
}
public BFSNode(PatternDatabase db) // initial state --> the empty tile is in the bottom right corner
{
this.db = db;
this.empty_row = db.rows - 1;
this.empty_col = db.cols - 1;
this.direction = Direction.NONE;
this.board = new MiniBoard(db.rows, db.cols);
this.distance = 0;
}