/// <summary>
/// Propagates a roll out's result back through the tree.
/// </summary>
/// <param name="result">Whether the roll out resulted in a win or loss.</param>
/// <param name="node">The current node.</param>
/// <param name="tree">The game tree object.</param>
private static void Propagate(bool result, int node, GameTree tree)
{
// Get the current node's parent ID.
int parent = tree.GetParent(node);
// Loop until we hit the root node's null parent link.
while (parent != -1)
{
// Get the parent's node object from the game tree.
GameTreeNode parentNode = tree.GetNode(parent);
// Add the win/loss to the parent's node object.
parentNode.AddResult(result);
// Save the parent's node object to disk.
tree.SetNode(parentNode);
// Set the parent ID to the grandparent ID.
parent = tree.GetParent(parent);
}
}