public static IPermutation Mutate(this Permutation permutation, IRando rando, float mutationRate)
{
if (rando.NextDouble() < mutationRate)
{
return(rando.ToPermutation(permutation.Order));
}
return(permutation);
}
public static ISortable Mutate(this ISortable sortable, IRando rando, float replacementRate)
{
if (rando.NextDouble() < replacementRate)
{
return(rando.ToPermutation(sortable.Order).ToSortable());
}
return(sortable);
}
public static StageDimer ToGenomeStageDimer(this IRando randy, uint order)
{
return(new StageDimer(
stage1: randy.ToFullTwoCyclePermutation(order),
stage2: randy.ToFullTwoCyclePermutation(order),
modifier: randy.ToPermutation(order)
));
}
public static GenomeSorterConjOrbit ToGenomeConjOrbit(this IRando randy, uint order, uint stageCount)
{
return(new GenomeSorterConjOrbit(
id: Guid.NewGuid(),
twoCycle: randy.ToFullTwoCyclePermutation(order),
conj: randy.ToPermutation(order),
order: order,
stageCount: stageCount));
}
public static GaData UpdateSortablesDirect(
this GaData sortingGaData, IRando randy)
{
var data = sortingGaData.Data.Copy();
var sortableWinRate = data.GetSortableWinRate();
var bestSortablePool = data.GetBestSortablePool();
var wholeSortablePool = data.GetSortablePool();
var sortableMutantCount = (uint)(wholeSortablePool.Sortables.Count * (1.0 - sortableWinRate));
var sortableNextGen = bestSortablePool.Sortables.Values.Concat(
0u.CountUp(sortableMutantCount)
.Select(s => randy.ToPermutation(bestSortablePool.Order).ToSortable())
);
data.SetSortablePool(new SortablePool(Guid.NewGuid(), sortableNextGen));
return(new GaData(data: data));
}
public static GaDualSorter EvolveSortables(this GaDualSorter gaDualSorter,
Dictionary <Guid, SortableResult> sortableResults,
IRando randy,
double replacementRate)
{
var winSortablesCount = (int)(gaDualSorter.SortablePool.Count() * (1.0 - replacementRate));
var looseSortablesCount = gaDualSorter.SortablePool.Count() - winSortablesCount;
var newSortables = Enumerable.Range(0, looseSortablesCount)
.Select(i => randy.ToPermutation(gaDualSorter.SorterPool.Order).ToSortable());
var bestSortables = sortableResults.Values
.OrderByDescending(r => r.AverageSortedness)
.Take(winSortablesCount)
.Select(sr => sr.Sortable);
var newSortablePool = new SortablePool(Guid.NewGuid(), bestSortables.Concat(newSortables));
return(new GaDualSorter(
genomePoolDualSorter: gaDualSorter.GenomePoolDualSorter,
sortablePool: newSortablePool,
randy: randy));
}
public static IPermutation ConjugateByRandomPermutation(this IPermutation perm, IRando randy)
{
return(perm.ConjugateBy(randy.ToPermutation(perm.Order)));
}
public static SortablePool ToRandomSortablePool(this IRando rando, uint order, uint poolCount)
{
return new SortablePool(Guid.NewGuid(),
0u.CountUp(poolCount).Select(i=>
rando.ToPermutation(order).ToSortable()));
}