private Collapse GenerateNewItems(IEnumerable <int> columns)
{
var collapse = new Collapse();
//find how many null values the column has
foreach (int column in columns)
{
var emptyCells = board.GetEmptyCellsOnColumn(column);
foreach (var cell in emptyCells)
{
var prefab = GetRandomItemPrefab();
var item = ((GameObject)Instantiate(prefab.gameObject, spawnPoints[column], Quaternion.identity)).GetComponent <Item>();
item.transform.SetParent(board.transform);
cell.SetItem(item);
if (board.rows - cell.Row > collapse.MaxDistance)
{
collapse.MaxDistance = board.rows - cell.Row;
}
collapse.AddCell(cell);
}
}
return(collapse);
}