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<!DOCTYPE html>
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<html>
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<head>
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<title>2048 AI</title>
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<meta name="viewport" content="width=device-width; initial-scale=1.0"/>
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<meta charset="utf-8"/>
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<style>
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body {
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width: 100%;
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}
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h1, .score-area, .control-area, #message-area {
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text-align: center;
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}
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#board {
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margin: 10px auto;
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}
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#board td {
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width: 40px;
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height: 40px;
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border: 1px solid red;
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margin: 0;
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text-align: center;
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}
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</style>
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</head>
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<body>
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<h1>2048</h1>
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<div class="score-area">Score: <span id="score">0</span>, Max: <span id="max">0</span></div>
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<div id="message-area"></div>
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<table id="board">
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<tr>
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<td></td>
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<td></td>
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<td></td>
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<td></td>
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</tr>
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<tr>
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<td></td>
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<td></td>
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<td></td>
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<td></td>
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</tr>
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<tr>
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<td></td>
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<td></td>
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<td></td>
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<td></td>
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</tr>
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<tr>
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<td></td>
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<td></td>
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<td></td>
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<td></td>
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</tr>
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</table>
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<div class="control-area">
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<div>
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<button id="start">Start</button>
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<button id="step">Step</button>
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<button id="loop">Loop</button>
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<button id="finish">Finish</button>
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</div>
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<div>
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<button id="left">left</button>
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<button id="up">up</button>
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<button id="down">down</button>
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<button id="right">right</button>
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</div>
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<h1>AI</h1>
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<div>
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<button id="ai-random">random</button>
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<button id="ai-next-max-score">next max score</button>
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<button id="ai-next-max-value">next max value</button>
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</div>
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</div>
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<script>
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"use strict";
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var board = {};
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board.create = function() {
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var brd = [];
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for (var i = 0; i < 4; i++) {
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brd[i] = [];
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for (var j = 0; j < 4; j++) {
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brd[i][j] = 0;
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}
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}
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return brd;
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}
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board.copy = function(from, to) {
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for (var i = 0; i < 4; i++) {
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for (var j = 0; j < 4; j++) {
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to[i][j] = from[i][j];
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}
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}
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}
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board.freeCnt = function(brd) {
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var cnt = 0;
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for (var i = 0; i < 4; i++) {
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for (var j = 0; j < 4; j++) {
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if (brd[i][j] === 0)
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cnt++;
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}
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}
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return cnt;
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}
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board.gameOver = function(brd) {
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if (board.freeCnt(brd) > 0)
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return false;
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for (var i = 0; i < 4; i++) {
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for (var j = 0; j < 3; j++) {
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if (brd[i][j] === brd[i][j+1])
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return false;
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}
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}
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for (var j = 0; j < 4; j++) {
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for (var i = 0; i < 3; i++) {
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if (brd[i][j] === brd[i+1][j])
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return false;
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}
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}
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return true;
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}
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board.random = function(brd) {
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var cnt = board.freeCnt(brd);
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cnt = Math.floor(Math.random() * cnt)+1;
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for (var i = 0; i < 4 && cnt > 0; i++) {
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for (var j = 0; j < 4 && cnt > 0; j++) {
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if (brd[i][j] !== 0)
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continue;
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if (cnt === 1)
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brd[i][j] = 2;
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cnt--;
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}
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}
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}
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/* http://www.reddit.com/r/2048/comments/214njx/highest_possible_score_for_2048_warning_math */
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board.score = function(brd) {
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var score = 0;
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var max = 0;
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for (var i = 0; i < 4; i++) {
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for (var j = 0; j < 4; j++) {
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var val = brd[i][j];
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if (val > 2)
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score += Math.log2(val) * val;
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if (max < val)
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max = val;
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}
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}
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return {score: score, max: max};
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}
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board.row = {};
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board.row.init = function() {
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return {stack: [], curr: 0};
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}
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board.row.push = function(state, val) {
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if (val === 0)
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return;
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if (state.curr === 0) {
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state.curr = val;
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return;
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}
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if (state.curr === val) {
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state.stack.push(state.curr*2);
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state.curr = 0;
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} else {
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state.stack.push(state.curr);
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state.curr = val;
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}
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}
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board.row.finish = function(state) {
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if (state.curr !== 0)
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state.stack.push(state.curr);
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}
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board.move = {};
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board.move.up = function(brd) {
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var updated = false;
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for (var j = 0; j < 4; j++) {
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var state = board.row.init();
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for (var i = 0; i < 4; i++) {
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board.row.push(state, brd[i][j]);
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}
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board.row.finish(state);
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for (var i = 0; i < state.stack.length; i++) {
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if (brd[i][j] !== state.stack[i])
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updated = true;
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brd[i][j] = state.stack[i];
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}
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for (; i < 4; i++) {
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if (brd[i][j] !== 0)
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updated = true;
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brd[i][j] = 0;
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}
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}
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return updated;
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};
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board.move.down = function(brd) {
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var updated = false;
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for (var j = 0; j < 4; j++) {
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var state = board.row.init();
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for (var i = 3; i >= 0; i--) {
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board.row.push(state, brd[i][j]);
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}
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board.row.finish(state);
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for (var i = 0; i < state.stack.length; i++) {
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if (brd[3-i][j] !== state.stack[i])
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updated = true;
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brd[3-i][j] = state.stack[i];
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}
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for (; i < 4; i++) {
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if (brd[3-i][j] !== 0)
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updated = true;
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brd[3-i][j] = 0;
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}
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}
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return updated;
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};
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board.move.left = function(brd) {
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var updated = false;
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for (var i = 0; i < 4; i++) {
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var state = board.row.init();
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for (var j = 0; j < 4; j++) {
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board.row.push(state, brd[i][j]);
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}
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board.row.finish(state);
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for (var j = 0; j < state.stack.length; j++) {
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if (brd[i][j] !== state.stack[j])
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updated = true;
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brd[i][j] = state.stack[j];
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}
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for (; j < 4; j++) {
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if (brd[i][j] !== 0)
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updated = true;
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brd[i][j] = 0;
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}
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}
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return updated;
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};
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board.move.right = function(brd) {
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var updated = false;
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for (var i = 0; i < 4; i++) {
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var state = board.row.init();
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for (var j = 3; j >= 0; j--) {
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board.row.push(state, brd[i][j]);
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}
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board.row.finish(state);
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for (var j = 0; j < state.stack.length; j++) {
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if (brd[i][3-j] !== state.stack[j])
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updated = true;
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brd[i][3-j] = state.stack[j];
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}
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for (; j < 4; j++) {
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if (brd[i][3-j] !== 0)
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updated = true;
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brd[i][3-j] = 0;
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}
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}
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return updated;
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};
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var boardDom = document.getElementById("board");
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var ui = {};
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ui.board = {};
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ui.board.set = function(i, j, val) {
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boardDom.querySelectorAll("tr")[i].querySelectorAll("td")[j].innerHTML = val;
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}
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ui.board.update = function(brd) {
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for (var i = 0; i < 4; i++) {
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for (var j = 0; j < 4; j++) {
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ui.board.set(i, j, (brd[i][j] >= 2) ? brd[i][j] : "");
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}
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}
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}
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ui.score = {};
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var scoreDom = document.getElementById("score");
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var maxDom = document.getElementById("max");
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ui.score.clear = function(brd) {
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scoreDom.innerHTML = '0';
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maxDom.innerHTML = '0';
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}
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ui.score.update = function(brd) {
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var score = board.score(brd);
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scoreDom.innerHTML = '' + score.score;
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maxDom.innerHTML = '' + score.max;
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}
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function start() {
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ui.score.clear();
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ui.message.clear();
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board.current = board.create();
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board.random(board.current);
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ui.board.update(board.current);
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}
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document.getElementById("start").addEventListener("click", start);
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function up() {
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var updated = board.move.up(board.current);
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if (updated) {
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board.random(board.current);
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ui.board.update(board.current);
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309 |
ui.score.update(board.current);
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}
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}
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document.getElementById("up").addEventListener("click", up);
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function down() {
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var updated = board.move.down(board.current);
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if (updated) {
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board.random(board.current);
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ui.board.update(board.current);
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ui.score.update(board.current);
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}
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}
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document.getElementById("down").addEventListener("click", down);
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function left() {
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var updated = board.move.left(board.current);
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324 |
if (updated) {
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325 |
board.random(board.current);
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326 |
ui.board.update(board.current);
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327 |
ui.score.update(board.current);
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328 |
}
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329 |
}
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330 |
document.getElementById("left").addEventListener("click", left);
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function right() {
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332 |
var updated = board.move.right(board.current);
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333 |
if (updated) {
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board.random(board.current);
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ui.board.update(board.current);
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336 |
ui.score.update(board.current);
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337 |
}
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338 |
}
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339 |
document.getElementById("right").addEventListener("click", right);
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340 |
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341 |
document.body.addEventListener("keydown", function(event) {
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342 |
var key = event.keyCode || event.which;
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switch (key) {
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case 38: up(); break;
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345 |
case 40: down(); break;
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346 |
case 37: left(); break;
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347 |
case 39: right(); break;
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}
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349 |
return false;
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350 |
});
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351 |
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352 |
ui.message = {};
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353 |
var messageDom = document.getElementById("message-area");
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354 |
ui.message.clear = function() {
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355 |
messageDom.innerHTML = "";
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356 |
}
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357 |
ui.message.set = function(msg) {
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358 |
messageDom.innerHTML = msg;
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359 |
}
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360 |
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361 |
function step() {
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362 |
ui.message.clear();
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363 |
if (board.gameOver(board.current)) {
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364 |
ui.message.set("Game over!");
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365 |
return;
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366 |
}
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367 |
var tmpBrd = board.create();
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368 |
board.copy(board.current, tmpBrd);
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369 |
var fn = ai.current(tmpBrd);
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370 |
if (typeof fn === 'undefined') {
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371 |
ui.message.set("I don't know how to move!");
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|
|
372 |
return;
|
|
|
373 |
}
|
|
|
374 |
var updated = board.move[fn].call(null, board.current);
|
|
|
375 |
if (updated) {
|
|
|
376 |
board.random(board.current);
|
|
|
377 |
ui.board.update(board.current);
|
|
|
378 |
ui.score.update(board.current);
|
|
|
379 |
} else {
|
|
|
380 |
ui.message.set("Wrong move!");
|
|
|
381 |
}
|
|
|
382 |
}
|
|
|
383 |
document.getElementById("step").addEventListener("click", step);
|
|
|
384 |
|
|
|
385 |
function finish() {
|
|
|
386 |
ui.message.clear();
|
|
|
387 |
while (!board.gameOver(board.current)) {
|
|
|
388 |
var tmpBrd = board.create();
|
|
|
389 |
board.copy(board.current, tmpBrd);
|
|
|
390 |
var fn = ai.current(tmpBrd);
|
|
|
391 |
if (typeof fn === 'undefined') {
|
|
|
392 |
ui.message.set("I don't know how to move!");
|
|
|
393 |
return;
|
|
|
394 |
}
|
|
|
395 |
var updated = board.move[fn].call(null, board.current);
|
|
|
396 |
if (updated) {
|
|
|
397 |
board.random(board.current);
|
|
|
398 |
} else {
|
|
|
399 |
ui.board.update(board.current);
|
|
|
400 |
ui.score.update(board.current);
|
|
|
401 |
ui.message.set("Wrong move!");
|
|
|
402 |
return;
|
|
|
403 |
}
|
|
|
404 |
}
|
|
|
405 |
ui.board.update(board.current);
|
|
|
406 |
ui.score.update(board.current);
|
|
|
407 |
ui.message.set("Game over!");
|
|
|
408 |
}
|
|
|
409 |
document.getElementById("finish").addEventListener("click", finish);
|
|
|
410 |
|
|
|
411 |
var ai = {};
|
|
|
412 |
|
|
|
413 |
ai.random = function(brd) {
|
|
|
414 |
var tmpBrd = board.create();
|
|
|
415 |
do {
|
|
|
416 |
var action = ["up", "down", "left", "right"][Math.floor(Math.random()*4)];
|
|
|
417 |
board.copy(brd, tmpBrd);
|
|
|
418 |
} while (!board.move[action](tmpBrd));
|
|
|
419 |
return action;
|
|
|
420 |
}
|
|
|
421 |
document.getElementById("ai-random").addEventListener("click", function() {
|
|
|
422 |
ai.current = ai.random;
|
|
|
423 |
});
|
|
|
424 |
|
|
|
425 |
ai.nextMaxScore = function(brd) {
|
|
|
426 |
var tmpBrd = board.create();
|
|
|
427 |
board.copy(brd, tmpBrd);
|
|
|
428 |
var maxScore = -1;
|
|
|
429 |
var action;
|
|
|
430 |
if (board.move.up(tmpBrd)) {
|
|
|
431 |
maxScore = board.score(tmpBrd).score;
|
|
|
432 |
action = "up";
|
|
|
433 |
}
|
|
|
434 |
board.copy(brd, tmpBrd);
|
|
|
435 |
if (board.move.left(tmpBrd)) {
|
|
|
436 |
var score = board.score(tmpBrd).score;
|
|
|
437 |
if (maxScore < score) {
|
|
|
438 |
action = "left";
|
|
|
439 |
maxScore = score;
|
|
|
440 |
}
|
|
|
441 |
}
|
|
|
442 |
board.copy(brd, tmpBrd);
|
|
|
443 |
if (board.move.down(tmpBrd)) {
|
|
|
444 |
var score = board.score(tmpBrd).score;
|
|
|
445 |
if (maxScore < score) {
|
|
|
446 |
action = "down";
|
|
|
447 |
maxScore = score;
|
|
|
448 |
}
|
|
|
449 |
}
|
|
|
450 |
board.copy(brd, tmpBrd);
|
|
|
451 |
if (board.move.right(tmpBrd)) {
|
|
|
452 |
var score = board.score(tmpBrd).score;
|
|
|
453 |
if (maxScore < score) {
|
|
|
454 |
action = "right";
|
|
|
455 |
maxScore = score;
|
|
|
456 |
}
|
|
|
457 |
}
|
|
|
458 |
return action;
|
|
|
459 |
}
|
|
|
460 |
document.getElementById("ai-next-max-score").addEventListener("click", function() {
|
|
|
461 |
ai.current = ai.nextMaxScore;
|
|
|
462 |
});
|
|
|
463 |
|
|
|
464 |
|
|
|
465 |
ai.nextMaxValue = function(brd) {
|
|
|
466 |
var tmpBrd = board.create();
|
|
|
467 |
board.copy(brd, tmpBrd);
|
|
|
468 |
var maxMax = -1;
|
|
|
469 |
var action;
|
|
|
470 |
if (board.move.up(tmpBrd)) {
|
|
|
471 |
maxMax = board.score(tmpBrd).max;
|
|
|
472 |
action = "up";
|
|
|
473 |
}
|
|
|
474 |
board.copy(brd, tmpBrd);
|
|
|
475 |
if (board.move.left(tmpBrd)) {
|
|
|
476 |
var max = board.score(tmpBrd).max;
|
|
|
477 |
if (maxMax < max) {
|
|
|
478 |
action = "left";
|
|
|
479 |
maxMax = max;
|
|
|
480 |
}
|
|
|
481 |
}
|
|
|
482 |
board.copy(brd, tmpBrd);
|
|
|
483 |
if (board.move.down(tmpBrd)) {
|
|
|
484 |
var max = board.score(tmpBrd).max;
|
|
|
485 |
if (maxMax < max) {
|
|
|
486 |
action = "down";
|
|
|
487 |
maxMax = max;
|
|
|
488 |
}
|
|
|
489 |
}
|
|
|
490 |
board.copy(brd, tmpBrd);
|
|
|
491 |
if (board.move.right(tmpBrd)) {
|
|
|
492 |
var max = board.score(tmpBrd).max;
|
|
|
493 |
if (maxMax < max) {
|
|
|
494 |
action = "right";
|
|
|
495 |
maxMax = max;
|
|
|
496 |
}
|
|
|
497 |
}
|
|
|
498 |
return action;
|
|
|
499 |
}
|
|
|
500 |
document.getElementById("ai-next-max-value").addEventListener("click", function() {
|
|
|
501 |
ai.current = ai.nextMaxValue;
|
|
|
502 |
});
|
|
|
503 |
|
|
|
504 |
</script>
|
|
|
505 |
|
|
|
506 |
</body>
|
|
|
507 |
</html>
|