/// <summary>
/// Called when the start button is pressed <para/>
/// Initialises the <see cref="mcts"/> tree search object and instantiates the root node <para/>
/// Also creates as many starting nodes as the user specified
/// </summary>
public void StartButtonPressed()
{
//Create an empty board instance, which will have whatever game the user chooses assigned to it
Board board;
//Assign whatever game board the user has chosen to the board instance
switch (HashUIController.GetGameChoice)
{
case 0:
board = new TTTBoard();
displayBoardModel = false;
break;
case 1:
board = new C4Board();
displayBoardModel = true;
//Create a C4 Board GameObject and obtain a reference to its BoardModelController Component
GameObject boardModel = Instantiate(Resources.Load("C4 Board", typeof(GameObject))) as GameObject;
boardModelController = boardModel.GetComponent <BoardModelController>();
boardModelController.Initialise();
break;
case 2:
board = new OthelloBoard();
displayBoardModel = false;
break;
default:
throw new System.Exception("Unknown game type index has been input");
}
mcts = new TreeSearch <Node>(board);
//Calculate the position of the root node and add an object for it to the scene
Vector3 rootNodePosition = BoardToPosition(mcts.Root.GameBoard);
GameObject rootNode = Instantiate(Resources.Load("HashNode"), rootNodePosition, Quaternion.identity) as GameObject;
rootNode.transform.parent = transform;
rootNode.GetComponent <HashNode>().AddNode(null, mcts.Root, false);
rootNode.GetComponent <HashNode>().Initialise(rootNodePosition);
//Add the root node to the position and object map
nodePositionMap.Add(rootNodePosition, rootNode);
nodeObjectMap.Add(mcts.Root, rootNode);
//Create the amount of starting nodes specified by the user
for (int i = 0; i < HashUIController.GetStartingNodeInput(); i++)
{
PerformStep(true);
}
//Swap out the current menu panels
HashUIController.SetMenuPanelActive(false);
HashUIController.SetNavigationPanelActive(true);
}
/// <summary>
/// Assigns the singleton reference when the scene is loaded, throwing an exception if one already exists
/// </summary>
public void Start()
{
//If the singleton reference is not null, throw an exception
if (controller != null)
{
throw new System.Exception("Singleton reference already exists!");
}
//Assign the singleton reference
controller = this;
}
/// <summary>
/// Performs a step of MCTS and creates a gameobject for the new <see cref="Node"/>'s board state if required <para/>
/// Also creates any relevant links between related nodes
/// </summary>
/// <param name="fromMenu">Flag used to indicate whether this step is being performed from the menu or not. Used to prevent the spawning animation if a node is not being added when the visualisation has already been started</param>
public void PerformStep(bool fromMenu)
{
//Perform an iteration of MCTS
mcts.Step();
//Get a reference to the newest node
Node newestNode = mcts.AllNodes[mcts.AllNodes.Count - 1];
//Hash the board contents of the newest node to obtain a positon
Vector3 newNodePosition = BoardToPosition(newestNode.GameBoard);
//Decrease the visibility of every node in the scene
foreach (HashNode n in AllNodes)
{
n.SetVisibility(n.Visibility - 0.01f);
}
//If the current board state already exists, then don't create a new node, but create a line to the existing node
if (nodePositionMap.ContainsKey(newNodePosition))
{
//Map the newest node to the existing node object if it does not already exist in the dicitonary
if (!nodeObjectMap.ContainsKey(newestNode))
{
nodeObjectMap.Add(newestNode, nodePositionMap[newNodePosition]);
}
}
else
{
//Instantiate the new node object at the hashed position
GameObject newNodeObject = Instantiate(Resources.Load("HashNode"), fromMenu ? newNodePosition : nodeObjectMap[newestNode.Parent].transform.position, Quaternion.identity) as GameObject;
//Set the parent of the new node object to be this controller object
newNodeObject.transform.parent = transform;
//Map the newest node to the new node object
nodeObjectMap.Add(newestNode, newNodeObject);
//Map the hashed position of the newest node to the new node object
nodePositionMap.Add(newNodePosition, newNodeObject);
AllNodes.Add(newNodeObject.GetComponent <HashNode>());
}
//Initialise the newest hash node and add a mcts Node to it
nodeObjectMap[newestNode].GetComponent <HashNode>().Initialise(newNodePosition);
nodeObjectMap[newestNode].GetComponent <HashNode>().AddNode(nodeObjectMap[newestNode.Parent], newestNode, !fromMenu);
HashUIController.SetTotalNodeText(nodeObjectMap.Count);
}
/// <summary>
/// Called when the pause button is pressed <para/>
/// Pauses the animation of nodes beng created and sets the play button to active again
/// </summary>
public void PauseButtonPressed()
{
playing = false;
HashUIController.PauseButtonPressed();
}
/// <summary>
/// Called when the play button is pressed <para/>
/// Starts the animation of ndoes being creates and sets the pause button to be active
/// </summary>
public void PlayButtonPressed()
{
playing = true;
HashUIController.PlayButtonPressed();
}
void Update()
{
if (Forwards())
{
transform.Translate(Vector3.forward * 0.1f * Speed);
}
if (Backwards())
{
transform.Translate(Vector3.forward * -0.1f * Speed);
}
if (StrafeLeft())
{
transform.Translate(Vector3.right * -0.1f * Speed);
}
if (StrafeRight())
{
transform.Translate(Vector3.right * 0.1f * Speed);
}
if (Upwards())
{
transform.Translate(Vector3.up * 0.1f * Speed);
}
if (Downwards())
{
transform.Translate(Vector3.up * -0.1f * Speed);
}
if (PivotLeft())
{
transform.Rotate(new Vector3(0, -Speed, 0));
}
if (PivotRight())
{
transform.Rotate(new Vector3(0, Speed, 0));
}
if (PivotUpwards())
{
transform.Rotate(new Vector3(-Speed, 0, 0));
}
if (PivotDownwards())
{
transform.Rotate(new Vector3(Speed, 0, 0));
}
if (currentHighlighted != null && NextNode() && currentHighlighted.NodeCount > currentSelectedNodeIndex + 1)
{
currentSelectedNodeIndex++;
HashUIController.DisplayNodeInfo(currentHighlighted.GetNode(currentSelectedNodeIndex), currentSelectedNodeIndex, currentHighlighted.NodeCount);
}
if (currentHighlighted != null && PreviousNode() && currentSelectedNodeIndex > 0)
{
currentSelectedNodeIndex--;
HashUIController.DisplayNodeInfo(currentHighlighted.GetNode(currentSelectedNodeIndex), currentSelectedNodeIndex, currentHighlighted.NodeCount);
}
//See if there are any Hashnodes in front of the camera
RaycastHit hit;
Ray ray = GetComponent <Camera>().ScreenPointToRay(Input.mousePosition);
//If the mouse is hovered over a HashNode object, highlight it
if (Physics.Raycast(ray, out hit) && hit.transform.GetComponent <HashNode>() != null)
{
//Get a reference to the HashNode that was hit
HashNode hitNode = hit.transform.GetComponent <HashNode>();
//If the node being looked at is not the current highlighted node, make it the highlighted node
if (currentHighlighted != hitNode)
{
//Reset the color of the old highlighted node, if there is one
if (currentHighlighted != null)
{
currentHighlighted.SetColor();
}
//Make the node being hovered over the current highlighted node and set its color to yellow
currentHighlighted = hitNode;
Color highlightedColor = Color.yellow;
highlightedColor.a = currentHighlighted.Visibility;
hitNode.GetComponent <Renderer>().material.color = highlightedColor;
//Display information about the current node
HashUIController.DisplayBoardInfo(hitNode.BoardState);
currentSelectedNodeIndex = 0;
HashUIController.DisplayNodeInfo(hitNode.GetNode(currentSelectedNodeIndex), currentSelectedNodeIndex, hitNode.NodeCount);
}
}
else if (currentHighlighted != null)
{
//If the camera is not looking at a HashNode object, reset the previously highlighted node and hide the node information panel
currentHighlighted.SetColor();
currentHighlighted = null;
HashUIController.HideBoardInfo();
currentSelectedNodeIndex = 0;
}
}
