public override RectInt Fill(RectInt area, float difficulty)
{
RectInt areaUsed = new RectInt(Vector2Int.one * int.MaxValue, Vector2Int.zero);
foreach (var y in area.FromTopToBottom())
{
var t = Mathf.InverseLerp(-1, 1, Mathf.Sin((y + _offset) * _amplitude.FromNormal(difficulty)));
if (Mathf.Abs(t - 0.5f) > _spawnThreshold.FromNormal(difficulty))
{
var position = new Vector2(Mathf.Lerp(area.xMin, area.xMax, 1 - Mathf.Round(t)), y);
areaUsed = areaUsed.ExtendToCover(position);
_objectFactory.Create(position);
}
}
return(areaUsed);
}
