private bool PerformLineOperations()
{
ICollection <int> fullLines = new LinkedList <int>();
for (int y = 0; y < GameRules.Height; y++)
{
int x;
for (x = 0; x < GameRules.Width; x++)
{
if (!_settledBlocks.ContainsKey(new Vector2Int(x, y)))
{
break;
}
}
if (x == GameRules.Width)
{
fullLines.Add(y);
}
}
if (fullLines.Count == 0)
{
return(false);
}
// Clear stage...
foreach (var y in fullLines)
{
for (int x = 0; x < GameRules.Width; x++)
{
_settledBlocks.Remove(new Vector2Int(x, y));
LineClear?.Invoke(y);
}
}
// Shift stage...
for (int y = 0; y < GameRules.Height; y++)
{
var currentY = y;
var freeSlotsAmountBelow = fullLines.Count(i => i < currentY);
for (int x = 0; x < GameRules.Width; x++)
{
var index = new Vector2Int(x, y);
if (_settledBlocks.TryGetValue(index, out var block))
{
_settledBlocks.Remove(index);
var newIndex = index + Vector2Int.down * freeSlotsAmountBelow;
block.Location = newIndex;
_settledBlocks[newIndex] = block;
}
}
}
return(true);
}
private void PlayLineClear(int numLines)
{
LineClear?.Invoke(this, new IntegerEventArgs(numLines));
}