/// <summary>
/// Moves the tetromino to down if it's possible and return the changed blocks after movement
/// If it is not possible to move down, checks for game over and if game has not been over, fixes the tetromino in deck and checks for rows to vanish
/// </summary>
/// <returns></returns>
public MoveDownResult MoveDown()
{
if (!CanMoveDown())
{
if (GameOver())
{
return(new MoveDownResult {
GameOver = true
});
}
deck.FixBlocks(VisibleBlocks);
var currentTetrominosRows = VisibleBlocks.Select(s => s.Y).Distinct().ToArray();
var vanishRowResult = deck.VanishRows(currentTetrominosRows);
return(new MoveDownResult
{
VanishRowResult = vanishRowResult
});
}
else
{
var inversedBlocks = InverseVisibleBlocks();
foreach (var block in Blocks)
{
block.MoveDown();
}
var changedBlocks = AddVisibleBlocksToChangedBlocks(inversedBlocks);
return(new MoveDownResult {
ChangedBlocks = changedBlocks
});
}
}