/// <summary>
/// Moves the tetromino down.
/// </summary>
/// <remarks>
/// This method is used by a thread. It needs its own copy of the reference to the
/// tetromino, because the only time this thread stops is when the
/// tetromino cant move any further. If the tetromino is dropped all
/// the way at once (space bar), it will generate a new active tetromino.
/// This will get its own thread, and now two threads are working on the
/// same tetromino.
/// </remarks>
private void MoveTetrominoDown()
{
Tetromino tet = ActiveTetromino;
Thread.Sleep((int)(500 * Math.Pow(0.75, Level - 1)));
MovingTetrominoMutex.WaitOne();
while (tet != null && !Fieldgrid.IsCollisionBelow(tet))
{
tet.MoveDownIfPossible(Fieldgrid);
MovingTetrominoMutex.ReleaseMutex();
GameController.RefreshUserInterface();
Thread.Sleep((int)(500 * Math.Pow(0.75, Level - 1)));
MovingTetrominoMutex.WaitOne();
}
if (tet != null && !tet.IsLockedInPlace)
{
Fieldgrid.PlaceOnGrid(tet);
}
MovingTetrominoMutex.ReleaseMutex();
GameController.RefreshUserInterface();
}