public long Generate(long generations)
{
for (long generation = 0; generation < generations; generation++)
{
var newGeneration = new BitArray(Potteries.Length);
foreach (var i in Enumerable.Range(0, Potteries.Length - 5))
{
var part = Potteries.CopySlice(i, 5);
foreach (var pattern in SpreadPatterns)
{
if (part.AreFirstFiveBitsEqual(pattern.Pots))
{
newGeneration[i + 2] = pattern.Outcome;
}
}
}
Potteries = newGeneration;
var sum = GetSum();
var sumDifference = sum - _previousSum;
if (_previousDifference == sumDifference)
{
return(sum + (generations - generation - 1) * sumDifference);
}
_previousSum = sum;
_previousDifference = sumDifference;
}
return(GetSum());
}
public long GetSum() => Potteries.Cast <bool>().Select((b, i) => b ? i - ZeroIndex : 0).Sum();
public override string ToString() => new string(Potteries.Cast <bool>().Select(b => b ? '#' : '.').ToArray());
