public List <List <Animal> > RestockColumns()
{
var restockedColumns = new List <List <Animal> >();
for (var x = 0; x < Width; x++)
{
List <Animal> column = null;
for (var y = 0; y < Height && _animals[x, y] == null; y++)
{
if (_tiles[x, y] == null)
{
continue;
}
if (column == null)
{
column = new List <Animal>();
restockedColumns.Add(column);
}
column.Add(SetAnimalAt(x, y, new Animal(x, y, _random.ChooseFromEnum <AnimalType>())));
}
}
return(restockedColumns);
}