public Grid(int cols, int rows)
{
this.ColsCount = cols;
this.RowsCount = rows;
gridMap = new GridData(cols, rows);
}
/** Clear the grid content */ public void Clear() => gridMap = new GridData(ColsCount, RowsCount);
/** Merge the piece content (cells) in the grid */
protected PlaceSt MergePiece(MergeType mode)
{
PlaceSt st = CheckBoundaries();
if (st != PlaceSt.OK)
{
return(st);
}
Piece piece = currentPiece;
int pieceX = piece.GetCol();
int pieceY = piece.GetRow();
// Copy cells data onto map_data in order to preserve it before merging
GridData draftMap = gridMap.Clone();
for (int y = 0; y < Piece.ROWS; ++y)
{
for (int x = 0; x < Piece.COLS; ++x)
{
int gridCol = pieceX + x;
int gridRow = pieceY + y;
if (gridCol < 0 ||
gridCol >= ColsCount ||
gridRow < 0 ||
gridRow >= RowsCount)
{
continue;
}
int gridCell = draftMap.GetRow(gridRow).Get[gridCol];
int pieceCell = piece.GetAt(x, y);
if (mode == MergeType.MERGE_PUT)
{
// In case of cell conflict, return TOUCH_DOWN or
// NO_ROOM_FOR_PIECE
// depending on top margin value
// (cells data modification will be not committed)
if (gridCell != 0 && pieceCell != 0)
{
return((pieceY - piece.GetTopMargin()) < 1 ?
PlaceSt.NO_ROOM_FOR_PIECE : PlaceSt.TOUCH_DOWN);
}
// Copy piece (or delete) cell content into the draft data map
if (pieceCell != 0)
{
draftMap.GetRow(gridRow).Get[gridCol] = pieceCell;
}
}
else
{
// Copy piece (or delete) cell content into the draft data
// map
if (pieceCell != 0)
{
draftMap.GetRow(gridRow).Get[gridCol] = 0;
}
}
}
}
// commit changes to the map data
gridMap = draftMap;
return(PlaceSt.OK);
}
