//Generates all children (results of all moves) from this state.
public override List <AIState> generateChildren()
{
//List of children
children = new List <AIState> ();
//If the game is already over there are no children
if (getWinner() >= 0)
{
return(children);
}
//Swap the player
int newPIndx = (playerIndex == 0) ? 1 : 0;
//Loop through all of the board pieces
for (int i = 0; i < 9; i++)
{
//if it is 0 (therefore empty)
if (stateRep[i] == 0)
{
//We have a possible peice to play so clone the board
int[] newBoard = (int[])stateRep.Clone();
//and simululate playing a piece
newBoard [i] = playerIndex + 1;
TTTAIState childAIState = new TTTAIState(newPIndx, this, depth + 1, newBoard);
//And add this state as a child
children.Add(childAIState);
}
}
//return it.
return(children);
}
//Handles the player clicking a tile.
public override void handlePlayerAt(int x, int y)
{
//Get the staterep location and updating it with the correct value
latestStateRep[x * 3 + y] = playerIndx == 0 ? 2 : 1;
//Change the players turn
currentPlayersTurn = (currentPlayersTurn + 1) % 2;
//Update the number of moves
numbMovesPlayed++;
//Set up the last state
latestAIState = new TTTAIState(playerIndx, null, 0, latestStateRep);
//Find out the result of the board
int result = latestAIState.getWinner();
//And the end game as such
if (result >= 0)
{
if (result == 2)
{
winlose.text = "You drew!";
}
else if (result == playerIndx)
{
winlose.text = "You won!";
}
else
{
winlose.text = "You lost!";
}
gamePlaying = false;
EndGame.SetActive(true);
}
}
//Called each time the update loop checks the AI progress
public override int checkAI()
{
//If the AI has not stated
if (!ai.started)
{
//Start it with the current state.
AIState currentState = new TTTAIState((currentPlayersTurn + 1) % 2, null, 0, latestStateRep);
ai.run(currentState);
}
//Otherwise if the AI is done
else if (ai.done)
{
//Get the next state (after the AI has moved)
TTTAIState nextAIState = (TTTAIState)ai.next;
//Unpack the state
latestAIState = nextAIState;
latestStateRep = nextAIState.stateRep;
//Reset the AI
ai.reset();
//Switch which player is playing
currentPlayersTurn = (currentPlayersTurn + 1) % 2;
//Update the graphical rep of the board
updateBoard();
//And increment the number of moves
numbMovesPlayed++;
}
//Return who the winner is
return(latestAIState == null ? -1 :(latestAIState.getWinner()));
}
public TicTacToe()
{
//Make a blank state
latestAIState = new TTTAIState();
currentPlayersTurn = 0;
}
