private List <Haiku> Select() //selection of 4 parents
{
List <int> roulette = Roulette(); //using roulette method of selection
List <Haiku> parents = new List <Haiku>();
var rnd = new Random(Guid.NewGuid().GetHashCode());
int p;
if (roulette.Count < 4) //if there are not enough parents in roulette (parents with 0 fitness value cannot be chosen to roulette)
{
for (int i = 0; i < roulette.Count; i++)
{
p = rnd.Next(roulette.Count); //select random parents from roulette
parents.Add(this.population[roulette[p]]); //add parent to parents list
roulette.RemoveAt(p); //remove the individual from roulette
}
for (int i = roulette.Count; i < 5; i++) //random creation of parents
{
Haiku haiku = new Haiku(); //creates new instance of haiku poem with default fitness values
haiku.pickRandomTxt(); //fills the lines of poem with randomly chosen haiku from the haiku database
this.population.Add(haiku);
}
}
else
{
for (int i = 0; i < 4; i++)
{
p = rnd.Next(roulette.Count); //select random parents from roulette
parents.Add(this.population[roulette[p]]); //add parent to parents list
roulette.RemoveAt(p); //removing the individual from roulette
}
}
return(parents);
}
public Haiku crossOver(Haiku p2)
{
Haiku haiku = new Haiku(1);
var rnd = new Random(Guid.NewGuid().GetHashCode());
int p;
p = rnd.Next(3); //randomly choose a verse in poem that will be taken from the 2nd parent
switch (p) //replace chosen verse
{
case 0:
haiku.v1 = p2.v1;
haiku.v2 = this.v2;
haiku.v3 = this.v3;
break;
case 1:
haiku.v1 = this.v1;
haiku.v2 = p2.v2;
haiku.v3 = this.v3;
break;
case 2:
haiku.v1 = this.v1;
haiku.v2 = this.v2;
haiku.v3 = p2.v3;
break;
}
return(haiku);
}
private void Injection() //injection method of 2 random individuals chosen from database
{
Haiku haiku = new Haiku(); //creates new instance of haiku poem with default fitness values
haiku.pickRandomTxt(); //fills the lines of poem with randomly chosen haiku from the haiku database
this.population.Add(haiku); //adds this haiku to population
haiku.pickRandomTxt(); //fills the lines of poem with randomly chosen haiku from the haiku database
this.population.Add(haiku); //adds this haiku to population
}
public PopulationOfHaikus()
{
this.population = new List <Haiku>();
for (int i = 0; i < 10; i++) //population of individuals
{
Haiku haiku = new Haiku(); //creates new instance of haiku poem with default fitness values
this.population.Add(haiku); //adds this haiku to population
}
}
private void Injection() //injection method of 2 random individuals chosen from database
{
Haiku h1 = new Haiku(); //creates new instance of haiku poem, selects random from database with default fitness values
this.population.Add(h1); //adds this haiku to population
Haiku h2 = new Haiku(); //creates new instance of haiku poem, selects random from database with default fitness values
this.population.Add(h2); //adds this haiku to population
}
} //generation counter
public PopulationOfHaikus()
{
this.population = new List <Haiku>();
this.generation = 0;
for (int i = 0; i < 10; i++) //population of individuals
{
Haiku haiku = new Haiku(); //creates new instance of haiku poem with default fitness values
haiku.pickRandomTxt(); //fills the lines of poem with randomly chosen haiku from the haiku database
this.population.Add(haiku); //adds this haiku to population
}
}
private void Reproduce(List <Haiku> parents) //reproducing parents, creates 8 new individuals by crossing over parents
{
this.population.Clear();
var rnd = new Random(Guid.NewGuid().GetHashCode());
Haiku child = new Haiku();
for (int i = 0; i < parents.Count; i++) //for each parent
{
int x = rnd.Next(parents.Count); //select random second parent
child = parents[i].crossOver(parents[x]); //perform cross over
this.population.Add(child); //add new individual to population
child = parents[x].crossOver(parents[i]); //perform cross over
this.population.Add(child); //add new individual to population
}
}