// Making the next generation
public void Reproduction()
{
// Refill the population with children from the mating pool
for (int i = 0; i < population.Length; i++)
{
// Destroy all rockets in population
population[i].Death();
// Spin the wheel of fourtune to pick two new parents
int m = Random.Range(0, matingPool.Count);
int d = Random.Range(0, matingPool.Count);
// Pick two parents
Chapter9Fig3Rocket mom = matingPool[m];
Chapter9Fig3Rocket dad = matingPool[d];
// Get their genes
Chapter9Fig3DNA momGenes = mom.DNA;
Chapter9Fig3DNA dadGenes = dad.DNA;
// Mate their genes
Chapter9Fig3DNA child = momGenes.Crossover(dadGenes);
// Mutate their genes
child.Mutate(mutationRate);
// Fill the new population with the new child
Vector2 position = new Vector2(0, -screenSize.y);
population[i] = new Chapter9Fig3Rocket(rocketObject, position, child, target, population.Length);
}
Generations++;
}
// Constructor
public Chapter9Fig3Rocket(GameObject rocketObj, Vector2 l, Chapter9Fig3DNA _dna, Chapter9Fig3Obstacle ob, int totalRockets)
{
HitTarget = false;
target = ob;
acceleration = Vector2.zero;
velocity = Vector2.zero;
position = l;
DNA = _dna;
finishTime = 0; // We're going to count how long it takes to reach target
recordDist = 10000; // Some high number that will be beat instantly
HitObstacle = false;
g = GameObject.Instantiate(rocketObj, position, Quaternion.identity);
}
// CROSSOVER
// Creates new DNA sequence from two (this & and a partner)
public Chapter9Fig3DNA Crossover(Chapter9Fig3DNA partner)
{
Vector2[] child = new Vector2[Genes.Length];
// Pick a midpoint
int crossover = Random.Range(0, Genes.Length);
// Take "half from one and "half" from the other
for (int i = 0; i < Genes.Length; i++)
{
if (i > crossover)
{
child[i] = Genes[i];
}
else
{
child[i] = partner.Genes[i];
}
}
Chapter9Fig3DNA newGenes = new Chapter9Fig3DNA(child);
return(newGenes);
}