1 files changed, 149 insertions, 0 deletions
diff --git a/examples/demos/tic-tac-toe/content/tic-tac-toe.js b/examples/demos/tic-tac-toe/content/tic-tac-toe.js
new file mode 100644
index 0000000000..5a166b750f
--- /dev/null
+++ b/examples/demos/tic-tac-toe/content/tic-tac-toe.js
@@ -0,0 +1,149 @@
+function winner(board)
+{
+    for (var i=0; i<3; ++i) {
+        if (board.children[i].state != ""
+                && board.children[i].state == board.children[i+3].state
+                && board.children[i].state == board.children[i+6].state)
+            return true
+
+        if (board.children[i*3].state != ""
+                && board.children[i*3].state == board.children[i*3+1].state
+                && board.children[i*3].state == board.children[i*3+2].state)
+            return true
+    }
+
+    if (board.children[0].state != ""
+            && board.children[0].state == board.children[4].state != ""
+            && board.children[0].state == board.children[8].state != "")
+        return true
+
+    if (board.children[2].state != ""
+            && board.children[2].state == board.children[4].state != ""
+            && board.children[2].state == board.children[6].state != "")
+        return true
+
+    return false
+}
+
+function restartGame()
+{
+    game.running = true
+
+    for (var i=0; i<9; ++i)
+        board.children[i].state = ""
+}
+
+function makeMove(pos, player)
+{
+    board.children[pos].state = player
+    if (winner(board)) {
+        gameFinished(player + " wins")
+        return true
+    } else {
+        return false
+    }
+}
+
+function canPlayAtPos(pos)
+{
+    return board.children[pos].state == ""
+}
+
+function computerTurn()
+{
+    var r = Math.random();
+    if (r < game.difficulty)
+        smartAI();
+    else
+        randomAI();
+}
+
+function smartAI()
+{
+    function boardCopy(a) {
+        var ret = new Object;
+        ret.children = new Array(9);
+        for (var i = 0; i<9; i++) {
+            ret.children[i] = new Object;
+            ret.children[i].state = a.children[i].state;
+        }
+        return ret;
+    }
+
+    for (var i=0; i<9; i++) {
+        var simpleBoard = boardCopy(board);
+        if (canPlayAtPos(i)) {
+            simpleBoard.children[i].state = "O";
+            if (winner(simpleBoard)) {
+                makeMove(i, "O")
+                return
+            }
+        }
+    }
+    for (var i=0; i<9; i++) {
+        var simpleBoard = boardCopy(board);
+        if (canPlayAtPos(i)) {
+            simpleBoard.children[i].state = "X";
+            if (winner(simpleBoard)) {
+                makeMove(i, "O")
+                return
+            }
+        }
+    }
+
+    function thwart(a,b,c) {    //If they are at a, try b or c
+        if (board.children[a].state == "X") {
+            if (canPlayAtPos(b)) {
+                makeMove(b, "O")
+                return true
+            } else if (canPlayAtPos(c)) {
+                makeMove(c, "O")
+                return true
+            }
+        }
+        return false;
+    }
+
+    if (thwart(4,0,2)) return;
+    if (thwart(0,4,3)) return;
+    if (thwart(2,4,1)) return;
+    if (thwart(6,4,7)) return;
+    if (thwart(8,4,5)) return;
+    if (thwart(1,4,2)) return;
+    if (thwart(3,4,0)) return;
+    if (thwart(5,4,8)) return;
+    if (thwart(7,4,6)) return;
+
+    for (var i =0; i<9; i++) {
+        if (canPlayAtPos(i)) {
+            makeMove(i, "O")
+            return
+        }
+    }
+    restartGame();
+}
+
+function randomAI()
+{
+    var unfilledPosns = new Array();
+
+    for (var i=0; i<9; ++i) {
+        if (canPlayAtPos(i))
+            unfilledPosns.push(i);
+    }
+
+    if (unfilledPosns.length == 0) {
+        restartGame();
+    } else {
+        var choice = unfilledPosns[Math.floor(Math.random() * unfilledPosns.length)];
+        makeMove(choice, "O");
+    }
+}
+
+function gameFinished(message)
+{
+    messageDisplay.text = message
+    messageDisplay.visible = true
+    game.running = false
+}
+