Accord.Genetic.GPTreeChromosome.Crossover C# (CSharp) Method

        public override void Crossover(IChromosome pair)
        {
            var rand = Generator.Random;
            GPTreeChromosome p = (GPTreeChromosome)pair;

            // check for correct pair
            if (p != null)
            {
                // do we need to use root node for crossover ?
                if ((root.Children == null) || (rand.Next(maxLevel) == 0))
                {
                    // give the root to the pair and use pair's part as a new root
                    root = p.RandomSwap(root);
                }
                else
                {
                    GPTreeNode node = root;

                    for (; ; )
                    {
                        // choose random child
                        int r = rand.Next(node.Gene.ArgumentsCount);
                        GPTreeNode child = (GPTreeNode)node.Children[r];

                        // swap the random node, if it is an end node or
                        // random generator "selected" this node
                        if ((child.Children == null) || (rand.Next(maxLevel) == 0))
                        {
                            // swap the node with pair's one
                            node.Children[r] = p.RandomSwap(child);
                            break;
                        }

                        // go further by tree
                        node = child;
                    }
                }
                // trim both of them
                Trim(root, maxLevel);
                Trim(p.root, maxLevel);
            }
        }