/// <summary>
/// The should mutate.
/// </summary>
/// <returns>
/// The <see cref="bool"/>.
/// </returns>
private bool ShouldMutate()
{
var chance = Math.Round(this.ChanceOfMutation, 3);
var intChance = Convert.ToInt32(chance * 1000);
var value = RandomNumberSource.GetNext(100000);
return(value < intChance);
}
/// <summary>
/// The mother and father produces a child.
/// </summary>
/// <returns>The child produced</returns>
public Genotype GetChild()
{
// TODO Add checks for different genotype lengths.
// TODO difference of lengths too great will produce could produce a null offspring
// TODO There is a random chance of producing a null offspring no matter what
// TODO There is a random chance of producing a really crazy off spring?
// TODO Add possibility of multiple children?
var genotype = new Genotype();
for (int i = 0; i < Couple.Mother.Genes.Count; i++)
{
var mutate = this.ShouldMutate();
// Handle different genotype lengths
if (i < Couple.Father.Genes.Count && (Couple.Father.Genes[i] != Couple.Mother.Genes[i] || mutate))
{
if (mutate)
{
this.Mutate(genotype);
}
else
{
// Randomly take mother or father
genotype.Genes.Add(RandomNumberSource.GetNext(1) == 1
? Couple.Mother.Genes[i]
: Couple.Father.Genes[i]);
}
}
else if (i < Couple.Father.Genes.Count)
{
// mothers genes are longer
genotype.Genes.Add(Couple.Mother.Genes[i]);
}
else
{
// they are equal
genotype.Genes.Add(Couple.Mother.Genes[i]);
}
}
if (Couple.Father.Genes.Count > Couple.Mother.Genes.Count)
{
for (var i = Couple.Father.Genes.Count - Couple.Mother.Genes.Count; i < Couple.Father.Genes.Count; i++)
{
if (this.ShouldMutate())
{
this.Mutate(genotype);
}
else
{
genotype.Genes.Add(Couple.Father.Genes[i]);
}
}
}
return(genotype);
}
/// <summary>
/// Performs a mutation on the given genotype
/// </summary>
/// <param name="genotype">
/// The genotype.
/// </param>
private void Mutate(Genotype genotype)
{
// Delete current gene, add 1 random, or 2 random
int next = RandomNumberSource.GetNext(2);
if (next == 2 || next == 1)
{
this.AddRandomGene(genotype);
}
else if (next == 2)
{
this.AddRandomGene(genotype);
}
}
