/// <summary>
/// generates a chromosome gene from its index containing a random row permutation
/// amongst those respecting the target mask.
/// </summary>
/// <param name="geneIndex">the index for the gene</param>
/// <returns>a gene generated for the index</returns>
public override Gene GenerateGene(int geneIndex)
{
var rnd = RandomizationProvider.Current;
int permIdx;
do
{
//we randomize amongst the permutations that account for the target mask.
permIdx = rnd.GetInt(0, TargetRowsPermutations[geneIndex].Count);
var perm = GetPermutation(geneIndex, permIdx);
//We pick a random previous row to check compatibility with
if (geneIndex == 0)
{
//we skip first row
break;
}
var checkRowIdx = rnd.GetInt(0, geneIndex);
var checkPerm = GetPermutation(checkRowIdx);
if (Range9.All(i => perm[i] != checkPerm[i]))
{
break;
}
} while (true);
return(new Gene(permIdx));
}
private IList <IList <IList <int> > > GetRowsPermutationsUncached()
{
var toReturn = new List <IList <IList <int> > >(9);
for (int i = 0; i < 9; i++)
{
var tempList = new List <IList <int> >();
foreach (var perm in AllPermutations)
{
// Permutation should be compatible with current row extended mask domains
if (Range9.All(j => ExtendedMask[i * 9 + j].Contains(perm[j])))
{
tempList.Add(perm);
}
}
toReturn.Add(tempList);
}
return(toReturn);
}