AForge.Genetic.GPCustomTree.RandomSwap C# (CSharp) Метод

        private GPCustomTreeNode RandomSwap(GPCustomTreeNode source)
        {
            GPCustomTreeNode retNode = null;

            // swap root node ?
            if ((root.Children == null) || (rand.Next(maxLevel) == 0))
            {
                // replace current root and return it
                retNode = root;
                root = source;
            }
            else
            {
                GPCustomTreeNode node = root;

                for (; ; )
                {
                    // choose random child
                    int r = rand.Next(node.Gene.ArgumentsCount);
                    GPCustomTreeNode child = (GPCustomTreeNode)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
                        retNode = child;
                        node.Children[r] = source;
                        break;
                    }

                    // go further by tree
                    node = child;
                }
            }
            return retNode;
        }