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tetris.html
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tetris.html
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<html>
<head>
<title>Tetris</title>
<script type="text/javascript" src="https://code.jquery.com/jquery-1.7.min.js"></script>
<script type="text/javascript">
function set() {};
set.prototype.push = function(element) {
this[element + ''] = true;
};
set.prototype.forEach = function(fn) {
for (var k in this) {
if (this.hasOwnProperty(k)) {
fn(k);
}
}
};
var playingField = new Array(18);
for (var i = 0; i < 18; i++) {
playingField[i] = new Array(25);
for (var j = 0; j < 25; j++) {
if (i == 0 || i == 1 || i == 2 || i == 3) {
playingField[i][j] = 1;
} else if (i == 14 || i == 15 || i == 16 || i == 17) {
playingField[i][j] = 1;
} else if (j == 24) {
playingField[i][j] = 1;
} else {
playingField[i][j] = 0;
}
}
}
var I = [[0, 2, 0, 0, 0, 0, 0, 0, 0, 2, 0, 0, 0, 0, 0, 0],
[0, 2, 0, 0, 0, 0, 0, 0, 0, 2, 0, 0, 0, 0, 0, 0],
[0, 2, 0, 0, 2, 2, 2, 2, 0, 2, 0, 0, 2, 2, 2, 2],
[0, 2, 0, 0, 0, 0, 0, 0, 0, 2, 0, 0, 0, 0, 0, 0]];
var J = [[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0],
[0, 0, 3, 0, 3, 3, 3, 0, 0, 3, 3, 0, 3, 0, 0, 0],
[0, 0, 3, 0, 0, 0, 3, 0, 0, 3, 0, 0, 3, 3, 3, 0],
[0, 3, 3, 0, 0, 0, 0, 0, 0, 3, 0, 0, 0, 0, 0, 0]];
var L = [[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0],
[0, 4, 0, 0, 0, 0, 4, 0, 0, 4, 4, 0, 4, 4, 4, 0],
[0, 4, 0, 0, 4, 4, 4, 0, 0, 0, 4, 0, 4, 0, 0, 0],
[0, 4, 4, 0, 0, 0, 0, 0, 0, 0, 4, 0, 0, 0, 0, 0]];
var O = [[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0],
[0, 5, 5, 0, 0, 5, 5, 0, 0, 5, 5, 0, 0, 5, 5, 0],
[0, 5, 5, 0, 0, 5, 5, 0, 0, 5, 5, 0, 0, 5, 5, 0],
[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]];
var S = [[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0],
[0, 6, 6, 0, 0, 6, 0, 0, 0, 6, 6, 0, 0, 6, 0, 0],
[6, 6, 0, 0, 0, 6, 6, 0, 6, 6, 0, 0, 0, 6, 6, 0],
[0, 0, 0, 0, 0, 0, 6, 0, 0, 0, 0, 0, 0, 0, 6, 0]];
var T = [[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0],
[0, 0, 0, 0, 0, 7, 0, 0, 0, 7, 0, 0, 0, 7, 0, 0],
[7, 7, 7, 0, 7, 7, 0, 0, 7, 7, 7, 0, 0, 7, 7, 0],
[0, 7, 0, 0, 0, 7, 0, 0, 0, 0, 0, 0, 0, 7, 0, 0]];
var Z = [[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0],
[8, 8, 0, 0, 0, 8, 0, 0, 8, 8, 0, 0, 0, 8, 0, 0],
[0, 8, 8, 0, 8, 8, 0, 0, 0, 8, 8, 0, 8, 8, 0, 0],
[0, 0, 0, 0, 8, 0, 0, 0, 0, 0, 0, 0, 8, 0, 0, 0]];
var pieces = [I, J, L, O, S, T, Z];
var currentPiece = selectNewPiece();
var line = 0;
var newLine = 0;
var left = 8;
var newLeft = 8;
var modifiedLines = new set();
var rotation = 0;
var newRotation = 0;
var updateCount = 0;
function updateState() {
updateCount++;
modifiedLines = new set();
if (newRotation != rotation) {
rotatePiece();
}
if (newLeft != left) {
movePieceHorizontally();
}
if (updateCount == 30) {
updateCount = 0;
if (line == newLine) {
newLine++;
}
}
if (newLine != line) {
lowerPiece();
}
}
function collide(newLine, newLeft, newRotation) {
for (var i = newLeft; i < newLeft + 4; ++i) {
var pieceX = i - newLeft;
var rowSum = 0;
for (var j = newLine; j < newLine + 4; ++j) {
var pieceY = j - newLine;
var pieceValue = pieces[currentPiece][pieceY][newRotation * 4 + pieceX];
if (pieceValue * playingField[Math.max(0, i)][j] != 0) {
return true;
}
}
}
return false;
}
function eraseCurrentPiece() {
for (var i = left; i < left + 4; ++i) {
var pieceX = i - left;
var rowSum = 0;
for (var j = line; j < line + 4; ++j) {
var pieceY = j - line;
if (pieces[currentPiece][pieceY][rotation * 4 + pieceX] != 0) {
playingField[i][j] = 0;
}
}
}
}
function drawCurrentPiece() {
for (var i = left; i < left + 4; ++i) {
var pieceX = i - left;
var rowSum = 0;
for (var j = line; j < line + 4; ++j) {
var pieceY = j - line;
var pieceValue = pieces[currentPiece][pieceY][rotation * 4 + pieceX];
if (pieceValue != 0) {
var pfV = playingField[i][j];
playingField[i][j] = pieceValue;
}
}
}
}
function lowerPiece() {
eraseCurrentPiece();
if (!collide(newLine, left, rotation)) {
line = newLine;
modifiedLines.push(line - 1);
modifiedLines.push(line);
modifiedLines.push(line + 1);
modifiedLines.push(line + 2);
modifiedLines.push(line + 3);
} else {
drawCurrentPiece();
for (var y = 23; y > 3; --y) {
var lineAbove = [];
var fullLine = true;
modifiedLines.push(y);
for (var x = 4; x < 14; ++x) {
lineAbove.push(playingField[x][y - 1]);
if (playingField[x][y] == 0) {
fullLine = false;
break;
}
}
if (fullLine) {
/*for (var x = 4; x < 14; ++x) {
playingField[x][y] = lineAbove[x];
}*/
for (var x = 4; x < 14; ++x) {
for (var y2 = y; y2 > 3; --y2) {
playingField[x][y2] = playingField[x][y2 - 1];
}
}
y++;
}
}
/*var removedLines = [];
for (var y = line; y - line < 5 && y < 24; ++y) {
var fullLine = true;
for (var j = 4; j < 17; ++j) {
if (playingField[j][y] == 0) {
fullLine = false;
break;
}
}
if (fullLine) {
removedLines.push(y);
}
}
if (removedLines.length > 0) {
var offset = 0;
for (var y = removedLines[removedLines.length - 1]; y > 2; --y) {
if (y == removedLines[removedLines.length - 1]) {
removedLines.pop();
offset++;
removedLines = removedLines.map(function (e) {
return ++e;
});
}
var lineSum = 0;
for (var x = 4; x < 14; ++x) {
lineSum += playingField[x][y];
playingField[x][y] = playingField[x][y - offset];
}
if (lineSum == 0) {
//break;
}
modifiedLines.push(y);
if (y == removedLines[removedLines.length - 1]) {
y++; //Need to process the same line again, in case the line above it was also completed
}
}
}*/
line = newLine = 0;
left = newLeft = 8;
rotation = newRotation = 0;
currentPiece = selectNewPiece();
}
drawCurrentPiece();
}
function movePieceHorizontally() {
eraseCurrentPiece();
if (!collide(line, newLeft, rotation)) {
left = newLeft;
modifiedLines.push(line);
modifiedLines.push(line + 1);
modifiedLines.push(line + 2);
modifiedLines.push(line + 3);
} else {
newLeft = left;
}
drawCurrentPiece();
}
function rotatePiece() {
eraseCurrentPiece();
if (!collide(line, left, newRotation)) {
rotation = newRotation;
modifiedLines.push(line);
modifiedLines.push(line + 1);
modifiedLines.push(line + 2);
modifiedLines.push(line + 3);
} else {
newRotation = rotation;
}
drawCurrentPiece();
}
function gameOver() {
eraseCurrentPiece();
for (var i = 4; i < 14; ++i) {
if (playingField[i][4] != 0) {
return true;
}
}
return false;
}
function selectNewPiece() {
//return 0;
return Math.floor(Math.random() * 7);
}
$(document).ready(function() {
var pieceColors = ['#f00', '#088', '#00f', '#800', '#080', '#008', '#808'];
var domPlayingField = new Array(10);
for (var i = 0; i < 10; i++) {
domPlayingField[i] = new Array(20);
for (var j = 0; j < 20; j++) {
var domBlock = $('<div></div>');
domBlock.css('position', 'absolute');
domBlock.css('width', '20px');
domBlock.css('height', '20px');
domBlock.css('left', (20*(i + 1)) + 'px');
domBlock.css('top', (20*j) + 'px');
var pfValue = playingField[i + 4][j + 4];
domBlock.tetriVal = pfValue;
if (pfValue == 0) {
domBlock.css('background', '#ccc');
} else {
domBlock.css('background', pieceColors[pfValue - 2]);
}
domPlayingField[i][j] = domBlock;
$('#field').append(domBlock);
}
}
var statBox = $('<div></div>');
$('body').append(statBox);
$(document).on('keydown', function(event) {
if (event.which == 37) { //Left arrow key
if (left == newLeft) {
newLeft--;
}
} else if (event.which == 38) { //Up arrow key
if (rotation == newRotation) {
newRotation = (newRotation + 1) % 4;
}
} else if (event.which == 39) { //Right arrow key
if (left == newLeft) {
newLeft++;
}
} else if (event.which == 40) { //Down arrow key
if (line == newLine) {
newLine++;
}
}
});
function draw() {
/*modifiedLines = [];
for (var i = 4; i < 24; ++i) {
modifiedLines.push(i);
}*/
var redraws = 0;
modifiedLines.forEach(function(line) {
if (line < 4 || line > 23) {
return;
}
for (var i = 4; i < 14; i++) {
var pfValue = playingField[i][line];
if (pfValue != domPlayingField[i - 4][line - 4].tetriVal) {
domPlayingField[i - 4][line - 4].tetriVal = pfValue;
redraws++;
if (pfValue == 0) {
domPlayingField[i - 4][line - 4].css('background', '#ccc');
} else {
domPlayingField[i - 4][line - 4].css('background', pieceColors[pfValue - 2]);
}
}
}
});
//statBox.text(redraws);
}
var framecount = 0;
function gameLoop() {
var timeStart = new Date().getTime();
framecount++;
updateState();
draw();
if (!gameOver()) {
setTimeout(gameLoop, 16 - (new Date().getTime() - timeStart));
}
}
setTimeout(gameLoop, 16);
});
</script>
<style>
#field {
border: 1px solid black;
width: 240px;
height: 420px;
position: absolute;
margin-top: -1px;
margin-left: -1px;
}
</style>
</head>
<body>
<div id="field"></div>
</body>
</html>