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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Tetris</title>
<style>
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
background: #0a0a0a;
color: #ccc;
font-family: 'Courier New', monospace;
display: flex;
justify-content: center;
align-items: center;
min-height: 100vh;
user-select: none;
}
#game-container {
display: flex;
gap: 16px;
align-items: flex-start;
}
#left-panel {
display: flex;
flex-direction: column;
gap: 12px;
width: 120px;
}
#right-panel {
display: flex;
flex-direction: column;
gap: 12px;
width: 120px;
}
.panel {
background: #111;
border: 1px solid #333;
border-radius: 4px;
padding: 10px;
}
.panel h3 {
font-size: 11px;
color: #888;
text-transform: uppercase;
letter-spacing: 1px;
margin-bottom: 8px;
}
.panel-value {
font-size: 20px;
color: #fff;
font-weight: bold;
}
canvas {
display: block;
image-rendering: pixelated;
}
#playfield-wrapper {
position: relative;
}
#playfield {
border: 2px solid #333;
background: #0d0d0d;
}
#hold-canvas {
width: 100px;
height: 80px;
background: #0d0d0d;
border: 1px solid #333;
}
#next-canvas {
width: 100px;
height: 240px;
background: #0d0d0d;
border: 1px solid #333;
}
#mute-btn {
background: #222;
border: 1px solid #444;
color: #aaa;
padding: 6px 10px;
cursor: pointer;
font-family: 'Courier New', monospace;
font-size: 11px;
border-radius: 3px;
width: 100%;
}
#mute-btn:hover { background: #333; }
.legend {
font-size: 10px;
color: #666;
line-height: 1.8;
}
.legend span {
color: #999;
}
</style>
</head>
<body>
<div id="game-container">
<div id="left-panel">
<div class="panel">
<h3>Hold</h3>
<canvas id="hold-canvas" width="100" height="80"></canvas>
</div>
<div class="panel">
<h3>Score</h3>
<div class="panel-value" id="score-display">0</div>
</div>
<div class="panel">
<h3>Level</h3>
<div class="panel-value" id="level-display">1</div>
</div>
<div class="panel">
<h3>Lines</h3>
<div class="panel-value" id="lines-display">0</div>
</div>
<button id="mute-btn">🔊 Sound ON</button>
</div>
<div id="playfield-wrapper">
<canvas id="playfield" width="320" height="640"></canvas>
</div>
<div id="right-panel">
<div class="panel">
<h3>Next</h3>
<canvas id="next-canvas" width="100" height="240"></canvas>
</div>
<div class="panel">
<h3>Controls</h3>
<div class="legend">
<span>←→</span> Move<br>
<span>↑/X</span> Rotate CW<br>
<span>Z</span> Rotate CCW<br>
<span>↓</span> Soft Drop<br>
<span>Space</span> Hard Drop<br>
<span>C</span> Hold<br>
<span>P</span> Pause
</div>
</div>
</div>
</div>
<script>
'use strict';
// ─── PIECES (SRS) ────────────────────────────────────────────────────────────
const PIECES = [
// 0: I
{
color: '#00f0f0',
states: [
[[0,0,0,0],[1,1,1,1],[0,0,0,0],[0,0,0,0]],
[[0,0,1,0],[0,0,1,0],[0,0,1,0],[0,0,1,0]],
[[0,0,0,0],[0,0,0,0],[1,1,1,1],[0,0,0,0]],
[[0,1,0,0],[0,1,0,0],[0,1,0,0],[0,1,0,0]]
]
},
// 1: O
{
color: '#f0f000',
states: [
[[1,1],[1,1]],
[[1,1],[1,1]],
[[1,1],[1,1]],
[[1,1],[1,1]]
]
},
// 2: T
{
color: '#a000f0',
states: [
[[0,1,0],[1,1,1],[0,0,0]],
[[0,1,0],[0,1,1],[0,1,0]],
[[0,0,0],[1,1,1],[0,1,0]],
[[0,1,0],[1,1,0],[0,1,0]]
]
},
// 3: S
{
color: '#00f000',
states: [
[[0,1,1],[1,1,0],[0,0,0]],
[[0,1,0],[0,1,1],[0,0,1]],
[[0,0,0],[0,1,1],[1,1,0]],
[[1,0,0],[1,1,0],[0,1,0]]
]
},
// 4: Z
{
color: '#f00000',
states: [
[[1,1,0],[0,1,1],[0,0,0]],
[[0,0,1],[0,1,1],[0,1,0]],
[[0,0,0],[1,1,0],[0,1,1]],
[[0,1,0],[1,1,0],[1,0,0]]
]
},
// 5: J
{
color: '#0000f0',
states: [
[[1,0,0],[1,1,1],[0,0,0]],
[[0,1,1],[0,1,0],[0,1,0]],
[[0,0,0],[1,1,1],[0,0,1]],
[[0,1,0],[0,1,0],[1,1,0]]
]
},
// 6: L
{
color: '#f0a000',
states: [
[[0,0,1],[1,1,1],[0,0,0]],
[[0,1,0],[0,1,0],[0,1,1]],
[[0,0,0],[1,1,1],[1,0,0]],
[[1,1,0],[0,1,0],[0,1,0]]
]
}
];
// SRS Wall Kick Data (JLSTZ pieces)
// Format: for each transition [from_rot * 2 + (dir===1?0:1)]
const KICKS_JLSTZ = [
// 0->1 (CW)
[[-1,0],[-1,1],[0,-2],[-1,-2]],
// 1->0 (CCW)
[[1,0],[1,-1],[0,2],[1,2]],
// 1->2 (CW)
[[1,0],[1,-1],[0,2],[1,2]],
// 2->1 (CCW)
[[-1,0],[-1,1],[0,-2],[-1,-2]],
// 2->3 (CW)
[[1,0],[1,1],[0,-2],[1,-2]],
// 3->2 (CCW)
[[-1,0],[-1,-1],[0,2],[-1,2]],
// 3->0 (CW)
[[-1,0],[-1,1],[0,-2],[-1,-2]],
// 0->3 (CCW)
[[1,0],[1,-1],[0,2],[1,2]]
];
const KICKS_I = [
// 0->1 (CW)
[[-2,0],[1,0],[-2,-1],[1,2]],
// 1->0 (CCW)
[[2,0],[-1,0],[2,1],[-1,-2]],
// 1->2 (CW)
[[-1,0],[2,0],[-1,2],[2,-1]],
// 2->1 (CCW)
[[1,0],[-2,0],[1,-2],[-2,1]],
// 2->3 (CW)
[[2,0],[-1,0],[2,1],[-1,-2]],
// 3->2 (CCW)
[[-2,0],[1,0],[-2,-1],[1,2]],
// 3->0 (CW)
[[1,0],[-2,0],[1,-2],[-2,1]],
// 0->3 (CCW)
[[-1,0],[2,0],[-1,2],[2,-1]]
];
// ─── BOARD ──────────────────────────────────────────────────────────────────
const COLS = 10;
const ROWS = 20;
const CELL = 32;
class Board {
constructor() {
this.grid = this.emptyGrid();
}
emptyGrid() {
return Array.from({length: ROWS}, () => Array(COLS).fill(0));
}
reset() {
this.grid = this.emptyGrid();
}
isValid(shape, px, py) {
for (let r = 0; r < shape.length; r++) {
for (let c = 0; c < shape[r].length; c++) {
if (!shape[r][c]) continue;
const nx = px + c;
const ny = py + r;
if (nx < 0 || nx >= COLS || ny >= ROWS) return false;
if (ny >= 0 && this.grid[ny][nx]) return false;
}
}
return true;
}
lock(shape, px, py, color) {
for (let r = 0; r < shape.length; r++) {
for (let c = 0; c < shape[r].length; c++) {
if (!shape[r][c]) continue;
const nx = px + c;
const ny = py + r;
if (ny < 0) continue;
this.grid[ny][nx] = color;
}
}
}
clearLines() {
let cleared = 0;
for (let r = ROWS - 1; r >= 0; r--) {
if (this.grid[r].every(c => c !== 0)) {
this.grid.splice(r, 1);
this.grid.unshift(Array(COLS).fill(0));
cleared++;
r++;
}
}
return cleared;
}
}
// ─── BAG7 RANDOMIZER ────────────────────────────────────────────────────────
class Bag7 {
constructor() {
this.bag = [];
}
shuffle(arr) {
for (let i = arr.length - 1; i > 0; i--) {
const j = Math.floor(Math.random() * (i + 1));
[arr[i], arr[j]] = [arr[j], arr[i]];
}
return arr;
}
refill() {
this.bag.push(...this.shuffle([0,1,2,3,4,5,6]));
}
next() {
if (this.bag.length === 0) this.refill();
return this.bag.shift();
}
ensureLength(n) {
while (this.bag.length < n) this.refill();
}
peek(n) {
this.ensureLength(n);
return this.bag.slice(0, n);
}
}
// ─── AUDIO ──────────────────────────────────────────────────────────────────
let audioCtx = null;
let muted = false;
function getAudioCtx() {
if (!audioCtx) {
audioCtx = new (window.AudioContext || window.webkitAudioContext)();
}
return audioCtx;
}
function playTone(freq, type, duration, vol) {
if (muted) return;
try {
const ctx = getAudioCtx();
if (ctx.state === 'suspended') ctx.resume();
const osc = ctx.createOscillator();
const gain = ctx.createGain();
osc.connect(gain);
gain.connect(ctx.destination);
osc.type = type || 'square';
osc.frequency.setValueAtTime(freq, ctx.currentTime);
gain.gain.setValueAtTime(vol || 0.25, ctx.currentTime);
gain.gain.exponentialRampToValueAtTime(0.001, ctx.currentTime + duration);
osc.start(ctx.currentTime);
osc.stop(ctx.currentTime + duration);
} catch(e) {}
}
function soundLock() { playTone(110, 'square', 0.07, 0.18); }
function soundMove() { playTone(220, 'square', 0.04, 0.08); }
function soundRotate() { playTone(330, 'square', 0.05, 0.10); }
function soundLineClear(n) {
const freqs = [440, 550, 660, 880];
const f = freqs[Math.min(n,4)-1];
playTone(f, 'square', 0.20, 0.30);
if (n === 4) {
setTimeout(() => playTone(f * 1.5, 'square', 0.25, 0.35), 120);
}
}
function soundGameOver() {
if (muted) return;
try {
const ctx = getAudioCtx();
if (ctx.state === 'suspended') ctx.resume();
[220, 196, 174, 130].forEach((f, i) => {
const osc = ctx.createOscillator();
const gain = ctx.createGain();
osc.connect(gain);
gain.connect(ctx.destination);
osc.type = 'sawtooth';
osc.frequency.setValueAtTime(f, ctx.currentTime + i * 0.18);
gain.gain.setValueAtTime(0.3, ctx.currentTime + i * 0.18);
gain.gain.exponentialRampToValueAtTime(0.001, ctx.currentTime + i * 0.18 + 0.25);
osc.start(ctx.currentTime + i * 0.18);
osc.stop(ctx.currentTime + i * 0.18 + 0.30);
});
} catch(e) {}
}
// ─── GAME STATE ─────────────────────────────────────────────────────────────
const board = new Board();
const bag = new Bag7();
let current = null; // {type, rot, x, y}
let holdType = null; // piece type index or null
let holdUsed = false;
let nextQueue = []; // array of type indices
let score = 0;
let lines = 0;
let level = 1;
let gameState = 'idle'; // 'idle' | 'playing' | 'paused' | 'gameover'
let lastTime = 0;
let dropAccum = 0;
let isLanded = false;
let lockTimer = 0;
const SCORE_TABLE = [0, 100, 300, 500, 800];
function gravityInterval(lvl) {
return Math.max(50, 1000 - (lvl - 1) * 90);
}
// ─── SPAWN ──────────────────────────────────────────────────────────────────
function fillQueue() {
while (nextQueue.length < 3) nextQueue.push(bag.next());
}
function makePiece(type) {
const shape = PIECES[type].states[0];
return {
type: type,
rot: 0,
x: Math.floor((COLS - shape[0].length) / 2),
y: -1
};
}
function spawnNext() {
fillQueue();
const type = nextQueue.shift();
fillQueue();
current = makePiece(type);
holdUsed = false;
isLanded = false;
lockTimer = 0;
const shape = PIECES[current.type].states[current.rot];
if (!board.isValid(shape, current.x, current.y)) {
gameState = 'gameover';
soundGameOver();
}
}
// ─── ROTATION (SRS) ─────────────────────────────────────────────────────────
function rotatePiece(dir) {
// dir: 1=CW, -1=CCW
const p = PIECES[current.type];
const numStates = p.states.length;
const newRot = (current.rot + dir + numStates) % numStates;
const newShape = p.states[newRot];
const isI = current.type === 0;
const kicks = isI ? KICKS_I : KICKS_JLSTZ;
// Compute kick table index
// CW: from_rot*2, CCW: new_rot*2+1
const kickIdx = dir === 1 ? current.rot * 2 : newRot * 2 + 1;
const table = kicks[kickIdx] || [];
// Try base (no offset)
if (board.isValid(newShape, current.x, current.y)) {
current = { ...current, rot: newRot };
soundRotate();
resetLockIfAble();
return;
}
// Try kicks
for (const [dx, dy] of table) {
// SRS: dy is positive = up = negative in our coord
const nx = current.x + dx;
const ny = current.y - dy;
if (board.isValid(newShape, nx, ny)) {
current = { ...current, rot: newRot, x: nx, y: ny };
soundRotate();
resetLockIfAble();
return;
}
}
// Rotation failed — no change
}
function resetLockIfAble() {
const shape = PIECES[current.type].states[current.rot];
if (board.isValid(shape, current.x, current.y + 1)) {
isLanded = false;
lockTimer = 0;
}
}
// ─── GHOST ──────────────────────────────────────────────────────────────────
function getGhostY() {
const shape = PIECES[current.type].states[current.rot];
let gy = current.y;
while (board.isValid(shape, current.x, gy + 1)) gy++;
return gy;
}
// ─── MOVEMENT ───────────────────────────────────────────────────────────────
function tryMove(dx, dy) {
const shape = PIECES[current.type].states[current.rot];
if (board.isValid(shape, current.x + dx, current.y + dy)) {
current.x += dx;
current.y += dy;
return true;
}
return false;
}
// ─── LOCKING ────────────────────────────────────────────────────────────────
function lockPiece() {
const shape = PIECES[current.type].states[current.rot];
board.lock(shape, current.x, current.y, PIECES[current.type].color);
soundLock();
const cleared = board.clearLines();
if (cleared > 0) {
score += SCORE_TABLE[Math.min(cleared, 4)] * level;
lines += cleared;
level = Math.floor(lines / 10) + 1;
soundLineClear(cleared);
}
updateUI();
spawnNext();
}
// ─── HOLD ───────────────────────────────────────────────────────────────────
function doHold() {
if (holdUsed) return;
holdUsed = true;
const type = current.type;
if (holdType === null) {
holdType = type;
spawnNext();
} else {
const prev = holdType;
holdType = type;
current = makePiece(prev);
isLanded = false;
lockTimer = 0;
}
}
// ─── HARD DROP ──────────────────────────────────────────────────────────────
function hardDrop() {
const gy = getGhostY();
const dropped = gy - current.y;
score += dropped * 2;
current.y = gy;
lockPiece();
updateUI();
}
// ─── GAME LOOP ───────────────────────────────────────────────────────────────
function gameLoop(ts) {
requestAnimationFrame(gameLoop);
if (gameState !== 'playing') {
render();
return;
}
const dt = lastTime ? Math.min(ts - lastTime, 150) : 0;
lastTime = ts;
dropAccum += dt;
const grav = gravityInterval(level);
while (dropAccum >= grav) {
dropAccum -= grav;
const shape = PIECES[current.type].states[current.rot];
if (board.isValid(shape, current.x, current.y + 1)) {
current.y++;
isLanded = false;
lockTimer = 0;
} else {
isLanded = true;
}
}
if (isLanded) {
lockTimer += dt;
if (lockTimer >= 500) {
lockPiece();
}
}
render();
}
// ─── RENDERING ──────────────────────────────────────────────────────────────
const pfCanvas = document.getElementById('playfield');
const pfCtx = pfCanvas.getContext('2d');
const holdCv = document.getElementById('hold-canvas');
const holdCtx = holdCv.getContext('2d');
const nextCv = document.getElementById('next-canvas');
const nextCtx = nextCv.getContext('2d');
function drawCell(ctx, cx, cy, color, size) {
size = size || CELL;
ctx.fillStyle = color;
ctx.fillRect(cx * size + 1, cy * size + 1, size - 2, size - 2);
// Top highlight
ctx.fillStyle = 'rgba(255,255,255,0.18)';
ctx.fillRect(cx * size + 1, cy * size + 1, size - 2, 3);
// Left highlight
ctx.fillRect(cx * size + 1, cy * size + 1, 3, size - 2);
// Bottom shadow
ctx.fillStyle = 'rgba(0,0,0,0.25)';
ctx.fillRect(cx * size + 1, cy * size + size - 4, size - 2, 3);
}
function renderBoard() {
pfCtx.fillStyle = '#0d0d0d';
pfCtx.fillRect(0, 0, pfCanvas.width, pfCanvas.height);
// Grid lines
pfCtx.strokeStyle = '#181818';
pfCtx.lineWidth = 0.5;
for (let r = 0; r < ROWS; r++) {
for (let c = 0; c < COLS; c++) {
pfCtx.strokeRect(c * CELL, r * CELL, CELL, CELL);
}
}
// Locked cells
for (let r = 0; r < ROWS; r++) {
for (let c = 0; c < COLS; c++) {
if (board.grid[r][c]) {
drawCell(pfCtx, c, r, board.grid[r][c], CELL);
}
}
}
}
function renderGhost() {
if (!current) return;
const gy = getGhostY();
if (gy === current.y) return;
const shape = PIECES[current.type].states[current.rot];
const color = PIECES[current.type].color;
pfCtx.strokeStyle = color;
pfCtx.lineWidth = 1.5;
pfCtx.globalAlpha = 0.45;
for (let r = 0; r < shape.length; r++) {
for (let c = 0; c < shape[r].length; c++) {
if (!shape[r][c]) continue;
const bx = (current.x + c) * CELL;
const by = (gy + r) * CELL;
pfCtx.strokeRect(bx + 2, by + 2, CELL - 4, CELL - 4);
}
}
pfCtx.globalAlpha = 1.0;
}
function renderCurrent() {
if (!current) return;
const shape = PIECES[current.type].states[current.rot];
const color = PIECES[current.type].color;
for (let r = 0; r < shape.length; r++) {
for (let c = 0; c < shape[r].length; c++) {
if (!shape[r][c]) continue;
drawCell(pfCtx, current.x + c, current.y + r, color, CELL);
}
}
}
function renderHold() {
holdCtx.fillStyle = '#0d0d0d';
holdCtx.fillRect(0, 0, holdCv.width, holdCv.height);
if (holdType === null) return;
const shape = PIECES[holdType].states[0];
const color = holdUsed ? '#444' : PIECES[holdType].color;
const size = 18;
const offX = Math.floor((holdCv.width - shape[0].length * size) / 2) / size;
const offY = Math.floor((holdCv.height - shape.length * size) / 2) / size;
for (let r = 0; r < shape.length; r++) {
for (let c = 0; c < shape[r].length; c++) {
if (shape[r][c]) drawCell(holdCtx, offX + c, offY + r, color, size);
}
}
}
function renderNext() {
nextCtx.fillStyle = '#0d0d0d';
nextCtx.fillRect(0, 0, nextCv.width, nextCv.height);
const size = 18;
const slotH = 80;
for (let i = 0; i < 3; i++) {
const type = nextQueue[i];
if (type === undefined) continue;
const shape = PIECES[type].states[0];
const color = PIECES[type].color;
const offX = Math.floor((nextCv.width - shape[0].length * size) / 2) / size;
const baseY = i * slotH;
const offY = baseY / size + Math.floor((slotH - shape.length * size) / 2) / size;
for (let r = 0; r < shape.length; r++) {
for (let c = 0; c < shape[r].length; c++) {
if (shape[r][c]) drawCell(nextCtx, offX + c, offY + r, color, size);
}
}
if (i < 2) {
nextCtx.strokeStyle = '#222';
nextCtx.lineWidth = 1;
nextCtx.beginPath();
nextCtx.moveTo(4, (i + 1) * slotH);
nextCtx.lineTo(nextCv.width - 4, (i + 1) * slotH);
nextCtx.stroke();
}
}
}
function drawOverlay(title, sub) {
pfCtx.fillStyle = 'rgba(0,0,0,0.78)';
pfCtx.fillRect(0, 0, pfCanvas.width, pfCanvas.height);
pfCtx.textAlign = 'center';
pfCtx.fillStyle = '#fff';
pfCtx.font = 'bold 34px Courier New';
pfCtx.fillText(title, pfCanvas.width / 2, pfCanvas.height / 2 - 24);
pfCtx.fillStyle = '#aaa';
pfCtx.font = '14px Courier New';
pfCtx.fillText(sub, pfCanvas.width / 2, pfCanvas.height / 2 + 18);
}
function updateUI() {
document.getElementById('score-display').textContent = score;
document.getElementById('level-display').textContent = level;
document.getElementById('lines-display').textContent = lines;
}
function render() {
renderBoard();
if (current && (gameState === 'playing' || gameState === 'paused')) {
renderGhost();
renderCurrent();
}
renderHold();
renderNext();
if (gameState === 'idle') {
drawOverlay('TETRIS', 'Press Space to start');
} else if (gameState === 'paused') {
drawOverlay('PAUSED', 'Press P to resume');
} else if (gameState === 'gameover') {
drawOverlay('GAME OVER', 'Press Space to restart');
}
}
// ─── INPUT ──────────────────────────────────────────────────────────────────
const keysDown = {};
document.addEventListener('keydown', e => {
const key = e.key;
// Space: start / hard drop
if (key === ' ') {
e.preventDefault();
if (gameState === 'idle' || gameState === 'gameover') {
startGame();
} else if (gameState === 'playing') {
hardDrop();
}
return;
}
// Pause
if (key === 'p' || key === 'P') {
if (gameState === 'playing') {
gameState = 'paused';
} else if (gameState === 'paused') {
gameState = 'playing';
lastTime = 0;
}
return;
}
if (gameState !== 'playing') return;
switch (key) {
case 'ArrowLeft':
e.preventDefault();
if (tryMove(-1, 0)) { soundMove(); resetLockIfAble(); }
break;
case 'ArrowRight':
e.preventDefault();
if (tryMove(1, 0)) { soundMove(); resetLockIfAble(); }
break;
case 'ArrowDown':
e.preventDefault();
if (tryMove(0, 1)) {
score += 1;
updateUI();
dropAccum = 0;
}
break;
case 'ArrowUp':
case 'x':
case 'X':
e.preventDefault();
rotatePiece(1);
break;
case 'z':
case 'Z':
e.preventDefault();
rotatePiece(-1);
break;
case 'c':
case 'C':
e.preventDefault();
doHold();
break;
}
});
// ─── START / RESET ───────────────────────────────────────────────────────────
function startGame() {
board.reset();
bag.bag = [];
holdType = null;
holdUsed = false;
nextQueue = [];
score = 0;
lines = 0;
level = 1;
dropAccum = 0;
lockTimer = 0;
isLanded = false;
lastTime = 0;
updateUI();
fillQueue();
spawnNext();
gameState = 'playing';
}
// ─── MUTE BUTTON ─────────────────────────────────────────────────────────────
document.getElementById('mute-btn').addEventListener('click', () => {
muted = !muted;
document.getElementById('mute-btn').textContent =
muted ? '\\uD83D\\uDD07 Sound OFF' : '\\uD83D\\uDD0A Sound ON';
});
// ─── BOOT ────────────────────────────────────────────────────────────────────
requestAnimationFrame(gameLoop);
</script>
</body>
</html>