| 1 |
(function () { |
| 2 |
'use strict'; |
| 3 |
|
| 4 |
// ---- Tetromino definitions (all rotations) ---- |
| 5 |
var PIECES = { |
| 6 |
I: { rotations: [[[0,1],[1,1],[2,1],[3,1]],[[1,0],[1,1],[1,2],[1,3]],[[0,2],[1,2],[2,2],[3,2]],[[2,0],[2,1],[2,2],[2,3]]], color: '#06b6d4' }, |
| 7 |
O: { rotations: [[[0,0],[0,1],[1,0],[1,1]]], color: '#f59e0b' }, |
| 8 |
T: { rotations: [[[0,1],[1,0],[1,1],[1,2]],[[0,1],[1,1],[1,2],[2,1]],[[1,0],[1,1],[1,2],[2,1]],[[0,1],[1,0],[1,1],[2,1]]], color: '#a855f7' }, |
| 9 |
S: { rotations: [[[0,1],[0,2],[1,0],[1,1]],[[0,1],[1,1],[1,2],[2,2]]], color: '#22c55e' }, |
| 10 |
Z: { rotations: [[[0,0],[0,1],[1,1],[1,2]],[[0,2],[1,1],[1,2],[2,1]]], color: '#ef4444' }, |
| 11 |
L: { rotations: [[[0,2],[1,0],[1,1],[1,2]],[[0,1],[1,1],[2,1],[2,2]],[[1,0],[1,1],[1,2],[2,0]],[[0,0],[0,1],[1,1],[2,1]]], color: '#f97316' }, |
| 12 |
J: { rotations: [[[0,0],[1,0],[1,1],[1,2]],[[0,1],[0,2],[1,1],[2,1]],[[1,0],[1,1],[1,2],[2,2]],[[0,1],[1,1],[2,0],[2,1]]], color: '#3b82f6' } |
| 13 |
}; |
| 14 |
|
| 15 |
var PIECE_KEYS = Object.keys(PIECES); |
| 16 |
|
| 17 |
// Points for clearing lines (classic Tetris scoring) |
| 18 |
var LINE_POINTS = [0, 100, 300, 500, 800]; |
| 19 |
|
| 20 |
// Gravity interval in ms per level (level 1 = 800ms, each level -60ms, min 50ms) |
| 21 |
function levelInterval(level) { return Math.max(50, 800 - (level - 1) * 60); } |
| 22 |
|
| 23 |
function makeBoard(W, H) { |
| 24 |
var b = []; |
| 25 |
for (var r = 0; r < H; r++) { b.push(new Array(W).fill(null)); } |
| 26 |
return b; |
| 27 |
} |
| 28 |
|
| 29 |
function randomPiece() { |
| 30 |
var key = PIECE_KEYS[Math.floor(Math.random() * PIECE_KEYS.length)]; |
| 31 |
return { key: key, rot: 0, row: 0, col: 3 }; |
| 32 |
} |
| 33 |
|
| 34 |
function getCells(piece) { |
| 35 |
var p = PIECES[piece.key]; |
| 36 |
var offsets = p.rotations[piece.rot % p.rotations.length]; |
| 37 |
return offsets.map(function (o) { return [o[0] + piece.row, o[1] + piece.col]; }); |
| 38 |
} |
| 39 |
|
| 40 |
function isValid(board, piece, W, H) { |
| 41 |
var cells = getCells(piece); |
| 42 |
for (var i = 0; i < cells.length; i++) { |
| 43 |
var r = cells[i][0], c = cells[i][1]; |
| 44 |
if (c < 0 || c >= W || r >= H) return false; |
| 45 |
if (r >= 0 && board[r][c]) return false; |
| 46 |
} |
| 47 |
return true; |
| 48 |
} |
| 49 |
|
| 50 |
function placePiece(board, piece) { |
| 51 |
var cells = getCells(piece); |
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var color = PIECES[piece.key].color; |
| 53 |
cells.forEach(function (rc) { if (rc[0] >= 0) board[rc[0]][rc[1]] = color; }); |
| 54 |
} |
| 55 |
|
| 56 |
function clearLines(board, W, H) { |
| 57 |
var cleared = []; |
| 58 |
var newBoard = []; |
| 59 |
board.forEach(function (row, i) { |
| 60 |
if (row.every(Boolean)) { cleared.push(i); } |
| 61 |
else { newBoard.push(row); } |
| 62 |
}); |
| 63 |
while (newBoard.length < H) newBoard.unshift(new Array(W).fill(null)); |
| 64 |
return { board: newBoard, cleared: cleared.length }; |
| 65 |
} |
| 66 |
|
| 67 |
function ghostRow(board, piece, W, H) { |
| 68 |
var ghost = Object.assign({}, piece); |
| 69 |
while (true) { |
| 70 |
var next = Object.assign({}, ghost, { row: ghost.row + 1 }); |
| 71 |
if (!isValid(board, next, W, H)) break; |
| 72 |
ghost = next; |
| 73 |
} |
| 74 |
return ghost.row; |
| 75 |
} |
| 76 |
|
| 77 |
function initBlock(root) { |
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var optsRaw = root.getAttribute('data-opts'); |
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var opts; |
| 80 |
try { opts = JSON.parse(optsRaw); } catch (e) { opts = {}; } |
| 81 |
|
| 82 |
var W = opts.boardWidth || 10; |
| 83 |
var H = opts.boardHeight || 20; |
| 84 |
var CS = opts.cellSize || 30; |
| 85 |
var bgColor = opts.bgColor || '#0f0e17'; |
| 86 |
var boardBg = opts.boardBg || '#1a1a2e'; |
| 87 |
var gridColor = opts.gridColor || '#16213e'; |
| 88 |
var ghostColor = opts.ghostColor || 'rgba(255,255,255,0.12)'; |
| 89 |
var titleColor = opts.titleColor || '#fffffe'; |
| 90 |
var accentColor= opts.accentColor || '#ff8906'; |
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var showGhost = opts.showGhost !== false; |
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var showNext = opts.showNext !== false; |
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var startLevel = opts.startLevel || 1; |
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|
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if (opts.sectionBg) root.style.background = opts.sectionBg; |
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|
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// Style existing title/subtitle |
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var titleEl = root.querySelector('.bkbg-ttr-title'); |
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if (titleEl) { titleEl.style.color = titleColor; } |
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var subEl = root.querySelector('.bkbg-ttr-subtitle'); |
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if (subEl) { subEl.style.color = titleColor; } |
| 102 |
|
| 103 |
// ---- Build UI ---- |
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var layout = document.createElement('div'); |
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layout.className = 'bkbg-ttr-layout'; |
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root.appendChild(layout); |
| 107 |
|
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// Board canvas |
| 109 |
var canvas = document.createElement('canvas'); |
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canvas.className = 'bkbg-ttr-canvas'; |
| 111 |
canvas.width = W * CS; |
| 112 |
canvas.height = H * CS; |
| 113 |
canvas.style.border = '2px solid ' + accentColor + '55'; |
| 114 |
layout.appendChild(canvas); |
| 115 |
var ctx = canvas.getContext('2d'); |
| 116 |
|
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// Side panel |
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var panel = document.createElement('div'); |
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panel.className = 'bkbg-ttr-panel'; |
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layout.appendChild(panel); |
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|
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// Start/Pause button |
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var startBtn = document.createElement('button'); |
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startBtn.className = 'bkbg-ttr-start-btn'; |
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startBtn.style.background = accentColor; |
| 126 |
startBtn.style.color = '#fff'; |
| 127 |
startBtn.textContent = 'Start'; |
| 128 |
panel.appendChild(startBtn); |
| 129 |
|
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// Next piece preview |
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var nextCanvas = null; |
| 132 |
if (showNext) { |
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var nextWrap = document.createElement('div'); |
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nextWrap.className = 'bkbg-ttr-stat-box'; |
| 135 |
nextWrap.style.background = bgColor; |
| 136 |
nextWrap.style.border = '1px solid ' + accentColor + '33'; |
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var nextLabel = document.createElement('div'); |
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nextLabel.className = 'bkbg-ttr-stat-label'; |
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nextLabel.style.color = accentColor; |
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nextLabel.textContent = 'NEXT'; |
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nextCanvas = document.createElement('canvas'); |
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nextCanvas.className = 'bkbg-ttr-next-canvas'; |
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nextCanvas.width = 4 * 24; |
| 144 |
nextCanvas.height = 4 * 24; |
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nextWrap.appendChild(nextLabel); |
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nextWrap.appendChild(nextCanvas); |
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panel.appendChild(nextWrap); |
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} |
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|
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// Stat boxes |
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function makeStatBox(label) { |
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var box = document.createElement('div'); |
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box.className = 'bkbg-ttr-stat-box'; |
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box.style.background = bgColor; |
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box.style.border = '1px solid ' + accentColor + '33'; |
| 156 |
var lbl = document.createElement('div'); |
| 157 |
lbl.className = 'bkbg-ttr-stat-label'; |
| 158 |
lbl.style.color = accentColor; |
| 159 |
lbl.textContent = label; |
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var val = document.createElement('div'); |
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val.className = 'bkbg-ttr-stat-value'; |
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val.style.color = titleColor; |
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val.textContent = '0'; |
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box.appendChild(lbl); |
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box.appendChild(val); |
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panel.appendChild(box); |
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return val; |
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} |
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|
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var scoreEl = opts.showScore !== false ? makeStatBox('SCORE') : null; |
| 171 |
var levelEl = opts.showLevel !== false ? makeStatBox('LEVEL') : null; |
| 172 |
var linesEl = opts.showLines !== false ? makeStatBox('LINES') : null; |
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if (levelEl) levelEl.textContent = startLevel; |
| 174 |
|
| 175 |
// On-screen controls |
| 176 |
var ctrlDiv = document.createElement('div'); |
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ctrlDiv.className = 'bkbg-ttr-controls'; |
| 178 |
|
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function makeCtrl(label) { |
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var btn = document.createElement('button'); |
| 181 |
btn.className = 'bkbg-ttr-btn'; |
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btn.style.background = accentColor + '33'; |
| 183 |
btn.style.color = titleColor; |
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btn.textContent = label; |
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return btn; |
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} |
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|
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var btnUp = makeCtrl('↑'); |
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var btnLeft = makeCtrl('←'); |
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var btnDown = makeCtrl('↓'); |
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var btnRight = makeCtrl('→'); |
| 192 |
var btnDrop = makeCtrl('⤓'); |
| 193 |
btnDrop.style.width = '98px'; |
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|
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var row1 = document.createElement('div'); row1.className = 'bkbg-ttr-ctrl-row'; row1.appendChild(btnUp); |
| 196 |
var row2 = document.createElement('div'); row2.className = 'bkbg-ttr-ctrl-row'; |
| 197 |
[btnLeft, btnDown, btnRight].forEach(function (b) { row2.appendChild(b); }); |
| 198 |
var row3 = document.createElement('div'); row3.className = 'bkbg-ttr-ctrl-row'; row3.appendChild(btnDrop); |
| 199 |
|
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ctrlDiv.appendChild(row1); |
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ctrlDiv.appendChild(row2); |
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ctrlDiv.appendChild(row3); |
| 203 |
|
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var hint = document.createElement('div'); |
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hint.className = 'bkbg-ttr-keys-hint'; |
| 206 |
hint.style.color = titleColor; |
| 207 |
hint.innerHTML = '← → Move ↑ Rotate<br>↓ Soft Drop Space: Hard Drop'; |
| 208 |
ctrlDiv.appendChild(hint); |
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panel.appendChild(ctrlDiv); |
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|
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// ---- Game state ---- |
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var board, current, next, score, level, lines; |
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var running = false, paused = false, over = false; |
| 214 |
var dropTimer = 0, lastTime = 0; |
| 215 |
var rafId = null; |
| 216 |
|
| 217 |
function initState() { |
| 218 |
board = makeBoard(W, H); |
| 219 |
current = randomPiece(); |
| 220 |
next = randomPiece(); |
| 221 |
score = 0; |
| 222 |
level = startLevel; |
| 223 |
lines = 0; |
| 224 |
over = false; |
| 225 |
if (scoreEl) scoreEl.textContent = 0; |
| 226 |
if (levelEl) levelEl.textContent = level; |
| 227 |
if (linesEl) linesEl.textContent = 0; |
| 228 |
} |
| 229 |
|
| 230 |
// ---- Drawing ---- |
| 231 |
function drawCell(ctx, c, r, color, cellSize) { |
| 232 |
var x = c * cellSize, y = r * cellSize, s = cellSize - 1; |
| 233 |
ctx.fillStyle = color; |
| 234 |
ctx.beginPath(); |
| 235 |
ctx.roundRect(x + 1, y + 1, s - 1, s - 1, cellSize > 20 ? 3 : 1); |
| 236 |
ctx.fill(); |
| 237 |
// Highlight |
| 238 |
ctx.fillStyle = 'rgba(255,255,255,0.22)'; |
| 239 |
ctx.fillRect(x + 2, y + 2, s - 2, 3); |
| 240 |
ctx.fillStyle = 'rgba(0,0,0,0.18)'; |
| 241 |
ctx.fillRect(x + 2, y + s - 2, s - 2, 2); |
| 242 |
} |
| 243 |
|
| 244 |
function drawBoard() { |
| 245 |
// Background |
| 246 |
ctx.fillStyle = boardBg; |
| 247 |
ctx.fillRect(0, 0, W * CS, H * CS); |
| 248 |
|
| 249 |
// Grid lines |
| 250 |
ctx.strokeStyle = gridColor; |
| 251 |
ctx.lineWidth = 0.5; |
| 252 |
for (var c = 0; c <= W; c++) { ctx.beginPath(); ctx.moveTo(c * CS, 0); ctx.lineTo(c * CS, H * CS); ctx.stroke(); } |
| 253 |
for (var r = 0; r <= H; r++) { ctx.beginPath(); ctx.moveTo(0, r * CS); ctx.lineTo(W * CS, r * CS); ctx.stroke(); } |
| 254 |
|
| 255 |
// Placed pieces |
| 256 |
board.forEach(function (row, r) { |
| 257 |
row.forEach(function (color, c) { |
| 258 |
if (color) drawCell(ctx, c, r, color, CS); |
| 259 |
}); |
| 260 |
}); |
| 261 |
|
| 262 |
if (!running || over) return; |
| 263 |
|
| 264 |
// Ghost piece |
| 265 |
if (showGhost && current) { |
| 266 |
var gRow = ghostRow(board, current, W, H); |
| 267 |
getCells(Object.assign({}, current, { row: gRow })).forEach(function (rc) { |
| 268 |
if (rc[0] >= 0) { |
| 269 |
ctx.fillStyle = ghostColor; |
| 270 |
ctx.fillRect(rc[1] * CS + 1, rc[0] * CS + 1, CS - 2, CS - 2); |
| 271 |
} |
| 272 |
}); |
| 273 |
} |
| 274 |
|
| 275 |
// Current piece |
| 276 |
if (current) { |
| 277 |
getCells(current).forEach(function (rc) { |
| 278 |
if (rc[0] >= 0) drawCell(ctx, rc[1], rc[0], PIECES[current.key].color, CS); |
| 279 |
}); |
| 280 |
} |
| 281 |
} |
| 282 |
|
| 283 |
function drawNext() { |
| 284 |
if (!nextCanvas || !next) return; |
| 285 |
var nctx = nextCanvas.getContext('2d'); |
| 286 |
nctx.fillStyle = bgColor; |
| 287 |
nctx.fillRect(0, 0, nextCanvas.width, nextCanvas.height); |
| 288 |
var cells = getCells(Object.assign({}, next, { row: 0, col: 0 })); |
| 289 |
var minC = Math.min.apply(null, cells.map(function (c) { return c[1]; })); |
| 290 |
var minR = Math.min.apply(null, cells.map(function (c) { return c[0]; })); |
| 291 |
cells.forEach(function (rc) { |
| 292 |
var c = rc[1] - minC, r = rc[0] - minR; |
| 293 |
drawCell(nctx, c + 0.5, r + 0.5, PIECES[next.key].color, 20); |
| 294 |
}); |
| 295 |
} |
| 296 |
|
| 297 |
function drawOverlay(msg) { |
| 298 |
ctx.fillStyle = 'rgba(0,0,0,0.72)'; |
| 299 |
ctx.fillRect(0, 0, W * CS, H * CS); |
| 300 |
ctx.fillStyle = titleColor; |
| 301 |
ctx.font = 'bold ' + CS + 'px system-ui'; |
| 302 |
ctx.textAlign = 'center'; |
| 303 |
ctx.fillText(msg, W * CS / 2, H * CS / 2); |
| 304 |
ctx.font = '14px system-ui'; |
| 305 |
ctx.fillStyle = accentColor; |
| 306 |
ctx.fillText('Press Start', W * CS / 2, H * CS / 2 + CS + 10); |
| 307 |
} |
| 308 |
|
| 309 |
// ---- Spawn & lock ---- |
| 310 |
function spawn() { |
| 311 |
current = next; |
| 312 |
next = randomPiece(); |
| 313 |
drawNext(); |
| 314 |
if (!isValid(board, current, W, H)) { |
| 315 |
over = true; |
| 316 |
running = false; |
| 317 |
drawBoard(); |
| 318 |
drawOverlay('GAME OVER'); |
| 319 |
startBtn.textContent = 'Restart'; |
| 320 |
if (rafId) cancelAnimationFrame(rafId); |
| 321 |
} |
| 322 |
} |
| 323 |
|
| 324 |
function lockPiece() { |
| 325 |
placePiece(board, current); |
| 326 |
var result = clearLines(board, W, H); |
| 327 |
board = result.board; |
| 328 |
lines += result.cleared; |
| 329 |
score += LINE_POINTS[result.cleared] * level; |
| 330 |
level = startLevel + Math.floor(lines / 10); |
| 331 |
if (scoreEl) scoreEl.textContent = score; |
| 332 |
if (levelEl) levelEl.textContent = level; |
| 333 |
if (linesEl) linesEl.textContent = lines; |
| 334 |
spawn(); |
| 335 |
} |
| 336 |
|
| 337 |
// ---- Move helpers ---- |
| 338 |
function tryMove(dr, dc) { |
| 339 |
if (!running || paused || over) return false; |
| 340 |
var moved = Object.assign({}, current, { row: current.row + dr, col: current.col + dc }); |
| 341 |
if (isValid(board, moved, W, H)) { current = moved; return true; } |
| 342 |
return false; |
| 343 |
} |
| 344 |
|
| 345 |
function rotate() { |
| 346 |
if (!running || paused || over) return; |
| 347 |
var p = PIECES[current.key]; |
| 348 |
var nextRot = (current.rot + 1) % p.rotations.length; |
| 349 |
var rotated = Object.assign({}, current, { rot: nextRot }); |
| 350 |
// Wall kick: try center, -1, +1, -2, +2 |
| 351 |
var kicks = [0, -1, 1, -2, 2]; |
| 352 |
for (var i = 0; i < kicks.length; i++) { |
| 353 |
var kicked = Object.assign({}, rotated, { col: rotated.col + kicks[i] }); |
| 354 |
if (isValid(board, kicked, W, H)) { current = kicked; return; } |
| 355 |
} |
| 356 |
} |
| 357 |
|
| 358 |
function hardDrop() { |
| 359 |
if (!running || paused || over) return; |
| 360 |
while (tryMove(1, 0)) {} |
| 361 |
lockPiece(); |
| 362 |
dropTimer = 0; |
| 363 |
} |
| 364 |
|
| 365 |
// ---- Game loop ---- |
| 366 |
function loop(ts) { |
| 367 |
var dt = ts - lastTime; |
| 368 |
lastTime = ts; |
| 369 |
if (!paused && !over) { |
| 370 |
dropTimer += dt; |
| 371 |
if (dropTimer >= levelInterval(level)) { |
| 372 |
dropTimer = 0; |
| 373 |
if (!tryMove(1, 0)) lockPiece(); |
| 374 |
} |
| 375 |
} |
| 376 |
drawBoard(); |
| 377 |
if (rafId !== null) rafId = requestAnimationFrame(loop); |
| 378 |
} |
| 379 |
|
| 380 |
function startGame() { |
| 381 |
if (rafId) cancelAnimationFrame(rafId); |
| 382 |
initState(); |
| 383 |
running = true; |
| 384 |
paused = false; |
| 385 |
dropTimer = 0; |
| 386 |
lastTime = performance.now(); |
| 387 |
spawn(); |
| 388 |
drawNext(); |
| 389 |
rafId = requestAnimationFrame(loop); |
| 390 |
startBtn.textContent = 'Pause'; |
| 391 |
} |
| 392 |
|
| 393 |
function togglePause() { |
| 394 |
if (!running || over) return; |
| 395 |
paused = !paused; |
| 396 |
startBtn.textContent = paused ? 'Resume' : 'Pause'; |
| 397 |
} |
| 398 |
|
| 399 |
startBtn.addEventListener('click', function () { |
| 400 |
if (!running || over) startGame(); |
| 401 |
else togglePause(); |
| 402 |
}); |
| 403 |
|
| 404 |
// Touch-friendly controls |
| 405 |
btnLeft.addEventListener('click', function () { tryMove(0, -1); }); |
| 406 |
btnRight.addEventListener('click', function () { tryMove(0, 1); }); |
| 407 |
btnDown.addEventListener('click', function () { if (!tryMove(1, 0)) lockPiece(); dropTimer = 0; }); |
| 408 |
btnUp.addEventListener('click', function () { rotate(); }); |
| 409 |
btnDrop.addEventListener('click', function () { hardDrop(); }); |
| 410 |
|
| 411 |
// Keyboard — only when canvas is focused/visible |
| 412 |
document.addEventListener('keydown', function (e) { |
| 413 |
if (!canvas.closest('body')) return; |
| 414 |
if (!running) return; |
| 415 |
switch (e.key) { |
| 416 |
case 'ArrowLeft': e.preventDefault(); tryMove(0, -1); break; |
| 417 |
case 'ArrowRight': e.preventDefault(); tryMove(0, 1); break; |
| 418 |
case 'ArrowDown': e.preventDefault(); if (!tryMove(1, 0)) lockPiece(); dropTimer = 0; break; |
| 419 |
case 'ArrowUp': e.preventDefault(); rotate(); break; |
| 420 |
case ' ': e.preventDefault(); hardDrop(); break; |
| 421 |
case 'p': case 'P': togglePause(); break; |
| 422 |
} |
| 423 |
}); |
| 424 |
|
| 425 |
// Initial draw |
| 426 |
initState(); |
| 427 |
drawBoard(); |
| 428 |
drawOverlay('TETRIS'); |
| 429 |
} |
| 430 |
|
| 431 |
document.querySelectorAll('.bkbg-ttr-app').forEach(function (root) { |
| 432 |
initBlock(root); |
| 433 |
}); |
| 434 |
})(); |
| 435 |
|
