public List <PossibleKey> Breed(PossibleKey key1, PossibleKey key2)
{
var childrens = new List <PossibleKey>();
var probOfCrossover = rand.NextDouble();
var keyLength = key1.Key.Length;
var childKey1 = new char[keyLength]; var childKey2 = new char[keyLength];
// Crossover
for (int i = 0; i < keyLength; i++)
{
childKey1[i] = key1.Key[i];
childKey2[i] = key2.Key[i];
}
//if (probOfCrossover < ProbabilityOfCrossover)
//{
// int randIndex = rand.Next(1, keyLength);
// for (int i = 0; i < randIndex; i++)
// {
// childKey1[i] = key1.Key[i];
// childKey2[i] = key2.Key[i];
// }
// for (int j = randIndex; j < keyLength; j++)
// {
// childKey1[j] = key2.Key[j];
// childKey2[j] = key1.Key[j];
// }
// var key1String = new String(childKey1);
// var key2String = new String(childKey2);
// var dupCharsKey1 = key1String.GroupBy(x => x)
// .Where(x => x.Count() > 1)
// .Select(x => x.Key);
// var dupCharsKey2 = key2String.GroupBy(x => x)
// .Where(x => x.Count() > 1)
// .Select(x => x.Key);
// var notInChild1 = ALPHABET.Except(childKey1).ToList();
// int cnt = 0;
// foreach (var dupChar in dupCharsKey1)
// {
// childKey1[key1String.IndexOf(dupChar)] = notInChild1[cnt];
// cnt++;
// }
// var notInChild2 = ALPHABET.Except(childKey2).ToList();
// cnt = 0;
// foreach (var dupChar in dupCharsKey2)
// {
// childKey2[key2String.IndexOf(dupChar)] = notInChild2[cnt];
// cnt++;
// }
// //var randPositions = new List<int>();
// //for(int i = 0; i < CrossoverPoints; i++)
// //{
// // int index = -1;
// // do
// // {
// // index = rand.Next(0, keyLength);
// // }
// // while (randPositions.Contains(index));
// // randPositions.Add(index);
// //}
// //List<char> remainingCharacters1 = new List<char>(key1.Key.ToCharArray());
// //List<char> remainingCharacters2 = new List<char>(key2.Key.ToCharArray());
// //foreach (int point in randPositions)
// //{
// // char c1 = key1.Key[point];
// // char c2 = key2.Key[point];
// // childKey1[point] = c1;
// // childKey2[point] = c2;
// // remainingCharacters1.Remove(c1);
// // remainingCharacters2.Remove(c2);
// //}
// //int j = 0;
// //for (int i = 0; i < keyLength; i++)
// //{
// // if (!randPositions.Contains(i))
// // {
// // childKey1[i] = remainingCharacters1[j];
// // childKey2[i] = remainingCharacters2[j];
// // j++;
// // }
// //}
//}
//else
//{
// for (int i = 0; i < keyLength; i++)
// {
// childKey1[i] = key1.Key[i];
// childKey2[i] = key2.Key[i];
// }
//}
// Mutation
var probOfKey1Mutate = rand.NextDouble();
var probOfKey2Mutate = rand.NextDouble();
if (probOfKey1Mutate < ProbabilityOfMutation)
{
int oldPosition = rand.Next(0, keyLength);
int newPosition = -1;
do
{
newPosition = rand.Next(0, keyLength);
} while (oldPosition == newPosition);
char oldChar = childKey1[oldPosition];
childKey1[oldPosition] = childKey1[newPosition];
childKey1[newPosition] = oldChar;
}
if (probOfKey2Mutate < ProbabilityOfMutation)
{
int oldPosition = rand.Next(0, keyLength);
int newPosition = -1;
do
{
newPosition = rand.Next(0, keyLength);
} while (oldPosition == newPosition);
char oldChar = childKey2[oldPosition];
childKey2[oldPosition] = childKey2[newPosition];
childKey2[newPosition] = oldChar;
}
childrens.Add(new PossibleKey(new String(childKey1), EncryptedText));
childrens.Add(new PossibleKey(new String(childKey2), EncryptedText));
return(childrens);
}
private int ComparatorForSorting(PossibleKey key1, PossibleKey key2)
{
return(-key1.Fitness.CompareTo(key2.Fitness));
}
