public bool IsTetrominoInCollision(BrickType[,] tetrominoGrid, int column, int row)
{
// check for collisions between the tetromino and the game board's bricks
for (int iRow = 0; iRow < tetrominoGrid.GetLength(0); iRow++)
{
for (int iCol = 0; iCol < tetrominoGrid.GetLength(1); iCol++)
{
if (tetrominoGrid[iRow, iCol] != BrickType.None &&
m_gameBoardState[iRow + row, iCol + column] != BrickType.None)
return true; // collision
}
}
return false;
}
/// <summary>
/// Can move the tetromino to within the horizontal boundaries of the game board (left,right boundaries only).
/// </summary>
/// <param name="tetrominoGrid"></param>
/// <param name="column">Column in which the left top cell of the descriptive grid is. Top row has index 0.</param>
/// <param name="row">Row in which the left top cell of the descriptive grid is. Leftmost column has index 0.</param>
/// <returns>Returns false if the tetromino starts to intersect the bottom.</returns>
public bool FitTetrominoToGameBoard(BrickType[,] tetrominoGrid, ref int column, ref int row)
{
// first move the tetromino within the boundaries:
for (int iRow = 0; iRow < tetrominoGrid.GetLength(0); iRow++)
{
for (int iCol = 0; iCol < tetrominoGrid.GetLength(1); iCol++)
{
if (tetrominoGrid[iRow, iCol] != BrickType.None)
{
if (row + iRow < 0)
{
// not a problem, does not happen
}
if (row + iRow >= m_rows)
{
return false; // bottom was intersected
}
if (column + iCol < 0)
{
column = -iCol;
}
if (column + iCol >= m_columns)
{
column = m_columns - iCol - 1;
}
}
}
}
return true;
}