public bool HardDrop()
{
tspin = elibigleForTspin;
elibigleForTspin = TspinType.NONE;
while (TryMove(pieceRotation, pieceX, pieceY + 1))
{
}
for (int i = current.states.GetLength(1) - 1; i >= 0; i--)
{
Pair <sbyte> block = current.states[pieceRotation, i];
SetCell(block.x + pieceX, block.y + pieceY, current.type);
}
ushort[] newBoard = new ushort[40];
linesCleared = 0;
for (int y = 39; y >= 0; y--)
{
bool rowFilled = board[y] == 0b0000001111111111;
if (rowFilled)
{
linesCleared += 1;
}
else
{
newBoard[y + linesCleared] = board[y];
}
}
board = newBoard;
SetPiece(rng.NextPiece());
if (!PieceFits(pieceRotation, pieceX, pieceY))
{
blockOut = true;
}
held = false;
return(!blockOut);
}
private bool Rotate(int rot)
{
elibigleForTspin = TspinType.NONE;
int len = current.offsetTable.GetLength(1);
for (int i = 0; i < len; i++)
{
Pair <sbyte> fromOffset = current.offsetTable[pieceRotation, i];
Pair <sbyte> toOffset = current.offsetTable[rot, i];
int xOffset = fromOffset.x - toOffset.x;
int yOffset = fromOffset.y - toOffset.y;
if (TryMove((byte)rot, pieceX + xOffset, pieceY - yOffset))
{
if (current == Tetrimino.T)
{
int filledCorners = 0;
bool topLeft = GetCell(pieceX - 1, pieceY - 1) != CellType.EMPTY;
if (topLeft)
{
filledCorners += 1;
}
bool topRight = GetCell(pieceX + 1, pieceY - 1) != CellType.EMPTY;
if (topRight)
{
filledCorners += 1;
}
bool bottomLeft = GetCell(pieceX - 1, pieceY + 1) != CellType.EMPTY;
if (bottomLeft)
{
filledCorners += 1;
}
bool bottomRight = GetCell(pieceX + 1, pieceY + 1) != CellType.EMPTY;
if (bottomRight)
{
filledCorners += 1;
}
if (filledCorners > 2)
{
bool isFull = pieceRotation switch {
0 => topLeft && topRight,
1 => topRight && bottomRight,
2 => bottomLeft && bottomRight,
_ => bottomLeft && topLeft
};
if (isFull || (yOffset == -2 && (xOffset == 1 || xOffset == -1)))
{
elibigleForTspin = TspinType.FULL;
}
else
{
elibigleForTspin = TspinType.MINI;
}
}
}
return(true);
}
}
return(false);
}
public void SetPiece(Tetrimino piece)
{
current = piece;
pieceX = 4;
pieceY = 19;
pieceRotation = 0;
elibigleForTspin = TspinType.NONE;
TryMove(pieceRotation, pieceX, 20);
}
private bool TryMove(byte rot, int x, int y)
{
if (PieceFits(rot, x, y))
{
pieceX = x;
pieceY = y;
pieceRotation = rot;
elibigleForTspin = TspinType.NONE;
return(true);
}
return(false);
}
