tic-tac-toe.js Example Filedeclarative/toys/tic-tac-toe/content/tic-tac-toe.jsfunction 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 } © 2008-2011 Nokia Corporation and/or its subsidiaries. Nokia, Qt and their respective logos are trademarks of Nokia Corporation in Finland and/or other countries worldwide. All other trademarks are property of their respective owners. Privacy Policy Licensees holding valid Qt Commercial licenses may use this document in accordance with the Qt Commercial License Agreement provided with the Software or, alternatively, in accordance with the terms contained in a written agreement between you and Nokia. Alternatively, this document may be used under the terms of the GNU Free Documentation License version 1.3 as published by the Free Software Foundation. |