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2048.html
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<!DOCTYPE html>
<html>
<head>
<title>2048</title>
<script src="https://wagenaartje.github.io/neataptic/cdn/1.4.7/neataptic.js"></script>
<script src="https://rawgit.com/skeeto/rng-js/master/rng.js"></script>
<style>
td { width: 80px; height: 80px; background-color: #BBB; font-family: sans-serif; font-size: 28px; text-align: center;}
</style>
</head>
<body>
<table>
<tr>
<td id="td0"></td>
<td id="td1"></td>
<td id="td2"></td>
<td id="td3"></td>
</tr>
<tr>
<td id="td4"></td>
<td id="td5"></td>
<td id="td6"></td>
<td id="td7"></td>
</tr>
<tr>
<td id="td8"></td>
<td id="td9"></td>
<td id="td10"></td>
<td id="td11"></td>
</tr>
<tr>
<td id="td12"></td>
<td id="td13"></td>
<td id="td14"></td>
<td id="td15"></td>
</tr>
</table>
<button onClick="move(0)">up</button>
<br/>
<button onClick="move(2)">left</button>
<button onClick="move(3)">right</button>
<br/>
<button onClick="move(1)">down</button>
<br/>
<input type=text id="stat" />
<button onClick="startgame()">rest</button>
<script>
// transformation matrices.
var xform = [ [ 0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15 ], // Up
[ 15,14,13,12,11,10,9,8,7,6,5,4,3,2,1,0 ], // Down
[ 0,4,8,12,1,5,9,13,2,6,10,14,3,7,11,15 ], // Left
[ 15,11,7,3,14,10,6,2,13,9,5,1,12,8,4,0 ] ]; // Right
var gameboard = [ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 ];
var empty = [ 0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15 ];
function rotateHue(h) {
var r, g, b, i, f, p, q, t;
h = (16-Math.log2(h))/16;
s = 0.5;
v = 1;
i = Math.floor(h * 6);
f = h * 6 - i;
p = v * (1 - s);
q = v * (1 - f * s);
t = v * (1 - (1 - f) * s);
switch (i % 6) {
case 0: r = v, g = t, b = p; break;
case 1: r = q, g = v, b = p; break;
case 2: r = p, g = v, b = t; break;
case 3: r = p, g = q, b = v; break;
case 4: r = t, g = p, b = v; break;
case 5: r = v, g = p, b = q; break;
}
return ("rgb("+Math.round(r*255).toString()+","+
Math.round(g*255).toString()+","+Math.round(b*255).toString()+")");
}
function randpop(a) {
return(a.splice(Math.floor(PRNG.uniform()*(a.length)),1));
}
function display() {
for (var i=0;i<16;i++) {
var tile = document.getElementById("td"+i.toString());
if (! gameboard[i]) {
tile.innerHTML = '';
tile.style.backgroundColor = "#BBB";
} else {
tile.innerHTML = gameboard[i].toString();
tile.style.backgroundColor = rotateHue(gameboard[i]);
}
}
lookahead();
}
function move(d) {
var c=0;
var mlock = [ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 ];
for (var i=4;i<8;i++) {
if ( gameboard[xform[d][i]] ) {
if (! gameboard[xform[d][i-4]]) {
gameboard[xform[d][i-4]]=gameboard[xform[d][i]];
gameboard[xform[d][i]]=0;
c++;
} else if (gameboard[xform[d][i-4]] === gameboard[xform[d][i]]) {
gameboard[xform[d][i-4]]*=2;
gameboard[xform[d][i]]=0;
mlock[i-4]++;
c++;
}
}
}
for (var i=8;i<12;i++) {
if ( gameboard[xform[d][i]] ) {
if (! gameboard[xform[d][i-4]]) {
if (! gameboard[xform[d][i-8]]) {
gameboard[xform[d][i-8]]=gameboard[xform[d][i]];
gameboard[xform[d][i]]=0;
c++;
} else if (gameboard[xform[d][i-8]] === gameboard[xform[d][i]] && ! mlock[i-8]) {
gameboard[xform[d][i-8]]*=2;
gameboard[xform[d][i]]=0;
mlock[i-8]++;
c++;
} else {
gameboard[xform[d][i-4]]=gameboard[xform[d][i]];
gameboard[xform[d][i]]=0;
c++;
}
} else if (gameboard[xform[d][i-4]] === gameboard[xform[d][i]] && ! mlock[i-4]) {
gameboard[xform[d][i-4]]*=2;
gameboard[xform[d][i]]=0;
mlock[i-4]++;
c++;
}
}
}
for (var i=12;i<16;i++) {
if ( gameboard[xform[d][i]] ) {
if (! gameboard[xform[d][i-4]]) {
if (! gameboard[xform[d][i-8]]) {
if (! gameboard[xform[d][i-12]]) {
gameboard[xform[d][i-12]]=gameboard[xform[d][i]];
gameboard[xform[d][i]]=0;
c++;
} else if (gameboard[xform[d][i-12]] === gameboard[xform[d][i]] && ! mlock[i-12]) {
gameboard[xform[d][i-12]]*=2;
gameboard[xform[d][i]]=0;
mlock[i-12]++;
c++;
} else {
gameboard[xform[d][i-8]]=gameboard[xform[d][i]];
gameboard[xform[d][i]]=0;
c++;
}
} else if (gameboard[xform[d][i-8]] === gameboard[xform[d][i]] && ! mlock[i-8]) {
gameboard[xform[d][i-8]]*=2;
gameboard[xform[d][i]]=0;
mlock[i-8]++;
c++;
} else {
gameboard[xform[d][i-4]]=gameboard[xform[d][i]];
gameboard[xform[d][i]]=0;
c++;
}
} else if (gameboard[xform[d][i-4]] === gameboard[xform[d][i]] && ! mlock[i-4]) {
gameboard[xform[d][i-4]]*=2;
gameboard[xform[d][i]]=0;
mlock[i-4]++;
c++;
}
}
}
empty = [];
for (var i=0;i<16;i++) {
if (!gameboard[i]) {
empty.push(i);
}
}
if (c) { gameboard[randpop(empty)] = (Math.floor(PRNG.uniform()*2)+1)*2; }
display();
}
function trymove(d,gb,mt) {
var c=0;
var mlock = [ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 ];
for (var i=4;i<8;i++) {
if ( gb[xform[d][i]] ) {
if (! gb[xform[d][i-4]]) {
gb[xform[d][i-4]]=gb[xform[d][i]];
gb[xform[d][i]]=0;
c++;
} else if (gb[xform[d][i-4]] === gb[xform[d][i]]) {
gb[xform[d][i-4]]*=2;
gb[xform[d][i]]=0;
mlock[i-4]++;
c++;
}
}
}
for (var i=8;i<12;i++) {
if ( gb[xform[d][i]] ) {
if (! gb[xform[d][i-4]]) {
if (! gb[xform[d][i-8]]) {
gb[xform[d][i-8]]=gb[xform[d][i]];
gb[xform[d][i]]=0;
c++;
} else if (gb[xform[d][i-8]] === gb[xform[d][i]] && ! mlock[i-8]) {
gb[xform[d][i-8]]*=2;
gb[xform[d][i]]=0;
mlock[i-8]++;
c++;
} else {
gb[xform[d][i-4]]=gb[xform[d][i]];
gb[xform[d][i]]=0;
c++;
}
} else if (gb[xform[d][i-4]] === gb[xform[d][i]] && ! mlock[i-4]) {
gb[xform[d][i-4]]*=2;
gb[xform[d][i]]=0;
mlock[i-4]++;
c++;
}
}
}
for (var i=12;i<16;i++) {
if ( gb[xform[d][i]] ) {
if (! gb[xform[d][i-4]]) {
if (! gb[xform[d][i-8]]) {
if (! gb[xform[d][i-12]]) {
gb[xform[d][i-12]]=gb[xform[d][i]];
gb[xform[d][i]]=0;
c++;
} else if (gb[xform[d][i-12]] === gb[xform[d][i]] && ! mlock[i-12]) {
gb[xform[d][i-12]]*=2;
gb[xform[d][i]]=0;
mlock[i-12]++;
c++;
} else {
gb[xform[d][i-8]]=gb[xform[d][i]];
gb[xform[d][i]]=0;
c++;
}
} else if (gb[xform[d][i-8]] === gb[xform[d][i]] && ! mlock[i-8]) {
gb[xform[d][i-8]]*=2;
gb[xform[d][i]]=0;
mlock[i-8]++;
c++;
} else {
gb[xform[d][i-4]]=gb[xform[d][i]];
gb[xform[d][i]]=0;
c++;
}
} else if (gb[xform[d][i-4]] === gb[xform[d][i]] && ! mlock[i-4]) {
gb[xform[d][i-4]]*=2;
gb[xform[d][i]]=0;
mlock[i-4]++;
c++;
}
}
}
mt.length = 0;
for (var i=0;i<16;i++) {
if (!gb[i]) {
mt.push(i);
}
}
return(c);
}
function score(gb,mt) {
return(Math.max(...gb)*mt.length);
}
function lookahead(p) {
var boards = [];
var emptys = [];
var scores = [];
for (var i=0;i<4;i++) {
boards[i] = gameboard[p].slice();
emptys[i] = empty[p].slice();
if ( trymove(i,boards[i],emptys[i]) ) {
scores[i] = score(boards[i],emptys[i]);
} else {
scores[i] = 0;
}
}
return(scores);
}
function startgame() {
gameboard = [ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 ];
empty = [ 0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15 ];
gameboard[randpop(empty)] = (Math.floor(PRNG.uniform()*2)+1)*2;
gameboard[randpop(empty)] = (Math.floor(PRNG.uniform()*2)+1)*2;
display();
}
var PRNG = new RNG("1");
var trainingData = [];
// Map arrow keys to movement.
document.onkeydown = function (event) {
key = event.key;
if (key == "ArrowUp") {
trainingData.push({input: gameboard.slice(), output: [1,0,0,0]});
move(0);
} else if (key == "ArrowDown") {
trainingData.push({input: gameboard.slice(), output: [0,1,0,0]});
move(1);
} else if (key == "ArrowLeft") {
trainingData.push({input: gameboard.slice(), output: [0,0,1,0]});
move(2);
} else if (key == "ArrowRight") {
trainingData.push({input: gameboard.slice(), output: [0,0,0,1]});
move(3);
}
}
startgame();
</script>
</body>
</html>