public ICurrentTetromino RotateTetromino(IBoard board, ICurrentTetromino currentTetromino)
{
if (this.IsRotatePossible(board, currentTetromino))
{
this.ClearTetromino(currentTetromino, board);
currentTetromino.Tetromino.Rotate();
this.RespawnTetromino(currentTetromino, board);
return(currentTetromino);
}
if (this.IsTetrominoMoveRightPossible(board, currentTetromino))
{
this.MoveTetrominoRight(board, currentTetromino);
if (this.IsRotatePossible(board, currentTetromino))
{
this.ClearTetromino(currentTetromino, board);
currentTetromino.Tetromino.Rotate();
this.RespawnTetromino(currentTetromino, board);
return(currentTetromino);
}
this.MoveTetrominoLeft(board, currentTetromino);
}
if (this.IsTetrominoMoveLeftPossible(board, currentTetromino))
{
this.MoveTetrominoLeft(board, currentTetromino);
if (this.IsRotatePossible(board, currentTetromino))
{
this.ClearTetromino(currentTetromino, board);
currentTetromino.Tetromino.Rotate();
this.RespawnTetromino(currentTetromino, board);
return(currentTetromino);
}
this.MoveTetrominoRight(board, currentTetromino);
}
return(currentTetromino);
}
private bool IsTetrominoMoveRightPossible(IBoard board, ICurrentTetromino currentTetromino)
{
if (currentTetromino == null)
{
return(false);
}
int blockToCheckY = this.GetRightSideColumnToCheck(currentTetromino);
if (!this.IsPointInBoardRange(board, currentTetromino.Row, blockToCheckY))
{
return(false);
}
this.ClearTetromino(currentTetromino, board);
for (int i = currentTetromino.Row; i < currentTetromino.Row + currentTetromino.Blocks.GetLength(0); i++)
{
for (int j = blockToCheckY - 1; j >= currentTetromino.Col; j--)
{
if (currentTetromino.Blocks[i - currentTetromino.Row, j - currentTetromino.Col] == 1 &&
board.Blocks[i, j + 1] == 1)
{
this.RespawnTetromino(currentTetromino, board);
return(false);
}
}
}
this.RespawnTetromino(currentTetromino, board);
return(true);
}
private bool IsTetrominoMoveDownPossible(IBoard board, ICurrentTetromino currentTetromino)
{
if (currentTetromino == null)
{
return(false);
}
int blockToCheckX = this.GetRowToCheck(currentTetromino);
if (!this.IsPointInBoardRange(board, blockToCheckX, 0))
{
return(false);
}
this.ClearTetromino(currentTetromino, board);
for (int i = currentTetromino.Row; i < blockToCheckX; i++)
{
for (int j = currentTetromino.Col; j < currentTetromino.Col + currentTetromino.Blocks.GetLength(1); j++)
{
if (currentTetromino.Blocks[i - currentTetromino.Row, j - currentTetromino.Col] == 1 &&
board.Blocks[i + 1, j] == 1)
{
this.RespawnTetromino(currentTetromino, board);
return(false);
}
}
}
this.RespawnTetromino(currentTetromino, board);
return(true);
}
public ICurrentTetromino MoveTetrominoLeft(IBoard board, ICurrentTetromino currentTetromino)
{
if (this.IsTetrominoMoveLeftPossible(board, currentTetromino))
{
this.ClearTetromino(currentTetromino, board);
currentTetromino.Col--;
this.RespawnTetromino(currentTetromino, board);
}
return(currentTetromino);
}
public ICurrentTetromino MoveTetrominoDown(IBoard board, ICurrentTetromino currentTetromino)
{
if (this.IsTetrominoMoveDownPossible(board, currentTetromino))
{
this.ClearTetromino(currentTetromino, board);
currentTetromino.Row++;
this.RespawnTetromino(currentTetromino, board);
return(currentTetromino);
}
else
{
return(null);
}
}
private int GetLeftSideColumnToCheck(ICurrentTetromino currentTetromino)
{
for (int i = currentTetromino.Col; i < currentTetromino.Col + currentTetromino.Blocks.GetLength(1); i++)
{
for (int j = currentTetromino.Row; j < currentTetromino.Row + currentTetromino.Blocks.GetLength(0); j++)
{
if (currentTetromino.Blocks[j - currentTetromino.Row, i - currentTetromino.Col] == 1)
{
return(i - 1);
}
}
}
return(-1);
}
private void RespawnTetromino(ICurrentTetromino currentTetromino, IBoard board)
{
for (int i = currentTetromino.Row; i < currentTetromino.Row + currentTetromino.Blocks.GetLength(0); i++)
{
for (int j = currentTetromino.Col; j < currentTetromino.Col + currentTetromino.Blocks.GetLength(1); j++)
{
if (this.IsPointInBoardRange(board, i, j) && board.Blocks[i, j] == 0 &&
currentTetromino.Blocks[i - currentTetromino.Row, j - currentTetromino.Col] == 1)
{
board.Blocks[i, j] =
currentTetromino.Blocks[i - currentTetromino.Row, j - currentTetromino.Col];
}
}
}
}
private void ClearTetromino(ICurrentTetromino currentTetromino, IBoard board)
{
for (int j = currentTetromino.Row; j < currentTetromino.Row + currentTetromino.Blocks.GetLength(0); j++)
{
for (int i = currentTetromino.Col; i < currentTetromino.Col + currentTetromino.Blocks.GetLength(1); i++)
{
if (this.IsPointInBoardRange(board, j, i))
{
if (currentTetromino.Blocks[j - currentTetromino.Row, i - currentTetromino.Col] == 1)
{
board.Blocks[j, i] = 0;
}
}
}
}
}
private int GetRowToCheck(ICurrentTetromino currentTetromino)
{
for (int i = currentTetromino.Row + currentTetromino.Blocks.GetLength(0) - 1;
i >= currentTetromino.Row;
i--)
{
for (int j = currentTetromino.Col; j < currentTetromino.Col + currentTetromino.Blocks.GetLength(1); j++)
{
if (currentTetromino.Blocks[i - currentTetromino.Row, j - currentTetromino.Col] == 1)
{
return(i + 1);
}
}
}
return(-1);
}
public ICurrentTetromino SpawnTetromino(ITetromino tetromino, IBoard board, ICurrentTetromino currentTetromino)
{
int tetrominoSpawnPoint =
(int)(board.Width / 2 - Math.Ceiling((double)tetromino.Blocks.GetLength(1) / 2));
if (this.IsSpawnPossible(tetromino, board, tetrominoSpawnPoint))
{
for (int i = 0; i < tetromino.Blocks.GetLength(0); i++)
{
for (int j = tetrominoSpawnPoint; j < tetrominoSpawnPoint + tetromino.Blocks.GetLength(1); j++)
{
if (tetromino.Blocks[i, j - tetrominoSpawnPoint] == 1)
{
board.Blocks[i, j] = 1;
}
}
}
return(new CurrentTetromino(tetromino, 0, tetrominoSpawnPoint));
}
return(currentTetromino);
}
private bool IsRotatePossible(IBoard board, ICurrentTetromino currentTetromino)
{
byte[,] nextRotation = currentTetromino.Tetromino.GetNextRotation();
for (int i = currentTetromino.Row; i < currentTetromino.Row + currentTetromino.Blocks.GetLength(0); i++)
{
for (int j = currentTetromino.Col; j < currentTetromino.Col + currentTetromino.Blocks.GetLength(1); j++)
{
if (!this.IsPointInBoardRange(board, i, j) &&
nextRotation[i - currentTetromino.Row, j - currentTetromino.Col] == 1)
{
return(false);
}
if (this.IsPointInBoardRange(board, i, j) &&
nextRotation[i - currentTetromino.Row, j - currentTetromino.Col] == 1 &&
currentTetromino.Blocks[i - currentTetromino.Row, j - currentTetromino.Col] == 0 &&
board.Blocks[i, j] == 1)
{
return(false);
}
}
}
return(true);
}
