Esempio n. 1
0
        /// <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);
        }
Esempio n. 2
0
        /// <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);
        }
Esempio n. 3
0
        /// <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);
            }
        }