//recursively loop through all neighbour empty tiles and open them
private void OpenEmptyRecursive(Tile tile)
{
if (!tile.isEmpty() && !tile.isMarked())
{ //if tile is not empty, open it and return
tile.Open();
return;
}
else if (tile.BeingProcessed || tile.isMarked()) //if tile is marked and being processed, stop processing it
{
return;
}
//set tile to being processed
tile.BeingProcessed = true;
//process tiles in all 8 directions
if (tile.GridCoords.X - 1 > -1)
{
OpenEmptyRecursive(gameFieldTiles.ElementAt(tile.GridCoords.Y).ElementAt(tile.GridCoords.X - 1));
}
if (tile.GridCoords.X - 1 > -1 && tile.GridCoords.Y - 1 > -1)
{
OpenEmptyRecursive(gameFieldTiles.ElementAt(tile.GridCoords.Y - 1).ElementAt(tile.GridCoords.X - 1));
}
if (tile.GridCoords.Y - 1 > -1)
{
OpenEmptyRecursive(gameFieldTiles.ElementAt(tile.GridCoords.Y - 1).ElementAt(tile.GridCoords.X));
}
if (tile.GridCoords.Y - 1 > -1 && tile.GridCoords.X + 1 < gameFieldTiles.ElementAt(1).Count)
{
OpenEmptyRecursive(gameFieldTiles.ElementAt(tile.GridCoords.Y - 1).ElementAt(tile.GridCoords.X + 1));
}
if (tile.GridCoords.X + 1 < gameFieldTiles.ElementAt(1).Count)
{
OpenEmptyRecursive(gameFieldTiles.ElementAt(tile.GridCoords.Y).ElementAt(tile.GridCoords.X + 1));
}
if (tile.GridCoords.X + 1 < gameFieldTiles.ElementAt(1).Count&& tile.GridCoords.Y + 1 < gameFieldTiles.Count)
{
OpenEmptyRecursive(gameFieldTiles.ElementAt(tile.GridCoords.Y + 1).ElementAt(tile.GridCoords.X + 1));
}
if (tile.GridCoords.X < gameFieldTiles.ElementAt(1).Count&& tile.GridCoords.Y + 1 < gameFieldTiles.ElementAt(1).Count)
{
OpenEmptyRecursive(gameFieldTiles.ElementAt(tile.GridCoords.Y + 1).ElementAt(tile.GridCoords.X));
}
if (tile.GridCoords.X - 1 > -1 && tile.GridCoords.Y + 1 < gameFieldTiles.ElementAt(1).Count)
{
OpenEmptyRecursive(gameFieldTiles.ElementAt(tile.GridCoords.Y + 1).ElementAt(tile.GridCoords.X - 1));
}
//open the tile if its not marked and not a mine
if (!tile.isMarked() && !tile.isMine)
{
tile.Open();
}
}