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Monorepo for Tangled
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16 kB · 551 lines
JavaScript
at master
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const COLS_WIDE = 14;const COLS_NARROW = 28;const WIDE_QUERY = "(min-width: 768px)";const REDUCED_MOTION_QUERY = "(prefers-reduced-motion: reduce)";
const LIVES_START = 3;const BASE_SPEED = 0.7; // cells/sec for the easiest danger laneconst SPEED_RAMP = 0.06; // extra cells/sec per lane closer to the goalconst SAFE_ROW_INTERVAL = 3; // every Nth interior row is a resting laneconst CAR_DENSITY_DIVISOR = 11; // larger = fewer cars per lane at level 1const CARS_PER_LEVEL = 0.5; // extra cars per lane added every ~2 levelsconst MAX_CARS_PER_LANE = 6; // cap so late levels don't get absurdly crowdedconst WIN_PAUSE_MS = 1600;const HIT_FLASH_MS = 180;
const PLAYER_COLOR = "hsl(45 100% 55%)";const PLAYER_GLYPH = "🐔";const PLAYER_GLYPH_SIZE = "16px"; // tune relative to your actual dot sizeconst HIT_COLOR = "hsl(355 85% 55%)";const HAZARD_GLYPH = "🚗";const HAZARD_GLYPH_SIZE = "16px"; // tune relative to your actual dot sizeconst HAZARD_BG = "hsla(330, 85%, 62%, 0.55)";const HAZARD_BG_REVERSE = "hsla(280, 80%, 62%, 0.55)";const GAME_OVER_GLYPH = "🍗";const GAME_OVER_GLYPH_SIZE = "16px";const GRASS_HUE = 100;const GRASS_HUE_JITTER = 18;const GRASS_LIGHTNESS_MIN = 36;const GRASS_LIGHTNESS_MAX = 58;const GRASS_SCALE_MIN = 0.65;const GRASS_SCALE_MAX = 1.3;
function getCols() { return matchMedia(WIDE_QUERY).matches ? COLS_WIDE : COLS_NARROW;}
function setupGame(grid) { const cells = Array.from(grid.children, (c) => c.firstElementChild).filter(Boolean); const total = cells.length; if (total === 0) return () => {};
const reducedMotion = matchMedia(REDUCED_MOTION_QUERY).matches; const wideQuery = matchMedia(WIDE_QUERY);
let cols = getCols(); let rows = Math.ceil(total / cols); let homeRow = total % cols === 0 ? rows - 1 : rows - 2; let prevKey = new Array(total).fill(""); let lanes = []; let player = { row: 0, col: 0 }; let level = 1; let bestLevel = 1; let lives = LIVES_START; let gameOver = false; let justWon = false; let resolving = false; let raf = 0; let lastTs = 0; let visible = true; let flashTimeoutId = 0; let winTimeoutId = 0; let playerElIdx = -1; let hazardIdxs = new Set(); let audioCtx = null;
cells.forEach((el) => { el.style.transformOrigin = "center"; if (!reducedMotion) { el.style.transition = "background-color 0.12s ease, transform 0.12s ease"; } });
grid.tabIndex = 0; grid.setAttribute("aria-label", "Dodge game: use arrow keys or tap to cross");
const status = document.createElement("div"); status.style.fontSize = "11px"; status.style.lineHeight = "1.4"; status.style.marginTop = "6px"; status.style.opacity = "0.75"; status.style.fontFamily = "inherit"; status.setAttribute("aria-live", "polite"); grid.insertAdjacentElement("afterend", status);
let grassColor = new Array(total); let grassScale = new Array(total); function buildGrassField() { for (let i = 0; i < total; i++) { const hue = GRASS_HUE + (Math.random() * 2 - 1) * GRASS_HUE_JITTER; const light = GRASS_LIGHTNESS_MIN + Math.random() * (GRASS_LIGHTNESS_MAX - GRASS_LIGHTNESS_MIN); grassColor[i] = `hsl(${hue.toFixed(0)} 55% ${light.toFixed(0)}%)`; grassScale[i] = GRASS_SCALE_MIN + Math.random() * (GRASS_SCALE_MAX - GRASS_SCALE_MIN); } } buildGrassField();
function colsInRow(row) { return row === rows - 1 ? total - cols * (rows - 1) : cols; }
// Odd levels climb from the bottom (homeRow) to the top (0). // Even levels descend from the top (0) back to the bottom (homeRow). function goalRow() { return level % 2 === 1 ? 0 : homeRow; } function startRow() { return level % 2 === 1 ? homeRow : 0; }
function laneTypeFor(row) { if (row === goalRow()) return "goal"; if (row === startRow()) return "home"; if (row % SAFE_ROW_INTERVAL === 0) return "safe"; return "danger"; }
function buildLanes() { lanes = new Array(rows); for (let r = 0; r <= homeRow; r++) { const type = laneTypeFor(r); if (type !== "danger") { lanes[r] = { type }; continue; } const distFromGoal = Math.abs(r - goalRow()); const baseCars = Math.max(1, Math.floor(cols / CAR_DENSITY_DIVISOR)); const bonusCars = Math.floor((level - 1) * CARS_PER_LEVEL); lanes[r] = { type, dir: r % 2 === 0 ? 1 : -1, speed: BASE_SPEED + (homeRow - distFromGoal) * SPEED_RAMP + (level - 1) * 0.08, carCount: Math.min(MAX_CARS_PER_LANE, baseCars + bonusCars), offset: Math.random() * cols, }; } }
function carColumnsFor(lane) { const spacing = cols / lane.carCount; const out = []; for (let k = 0; k < lane.carCount; k++) { const pos = ((lane.offset + k * spacing) % cols + cols) % cols; out.push(Math.round(pos) % cols); } return out; }
function resetPlayer() { const row = startRow(); const maxCol = colsInRow(row) - 1; player = { row, col: Math.floor(maxCol / 2) }; }
function applyStyle(i, bg, scale) { const key = bg + "|" + scale; if (prevKey[i] === key) return; prevKey[i] = key; const el = cells[i]; el.style.backgroundColor = bg; el.style.transform = scale === 1 ? "" : `scale(${scale})`; }
function clearCell(el) { el.style.backgroundColor = ""; el.style.transform = ""; el.textContent = ""; el.style.fontSize = ""; el.style.display = ""; el.style.alignItems = ""; el.style.justifyContent = ""; }
function paintPlayer(idx) { if (playerElIdx !== -1 && playerElIdx !== idx) { clearCell(cells[playerElIdx]); prevKey[playerElIdx] = ""; } const el = cells[idx]; el.style.backgroundColor = PLAYER_COLOR; el.style.display = "flex"; el.style.alignItems = "center"; el.style.justifyContent = "center"; el.style.fontSize = PLAYER_GLYPH_SIZE; el.textContent = PLAYER_GLYPH; prevKey[idx] = "player"; playerElIdx = idx; }
function paintHazard(i, dir) { const el = cells[i]; el.style.backgroundColor = dir === 1 ? HAZARD_BG_REVERSE : HAZARD_BG; el.style.display = "flex"; el.style.alignItems = "center"; el.style.justifyContent = "center"; el.style.fontSize = HAZARD_GLYPH_SIZE; el.style.transform = dir === 1 ? "scaleX(-1)" : ""; el.textContent = HAZARD_GLYPH; prevKey[i] = "hazard|" + dir; }
function clearHazard(i) { clearCell(cells[i]); prevKey[i] = ""; }
function renderGameOver() { for (let i = 0; i < total; i++) { const el = cells[i]; el.style.backgroundColor = ""; el.style.transform = ""; el.style.display = "flex"; el.style.alignItems = "center"; el.style.justifyContent = "center"; el.style.fontSize = GAME_OVER_GLYPH_SIZE; el.textContent = GAME_OVER_GLYPH; prevKey[i] = "gameover"; } playerElIdx = -1; hazardIdxs = new Set(); }
function render() { if (gameOver) { renderGameOver(); return; } const newHazards = new Map(); for (let r = 0; r <= homeRow; r++) { const lane = lanes[r]; const rowCols = colsInRow(r); const carCols = lane.type === "danger" ? carColumnsFor(lane) : null; for (let c = 0; c < rowCols; c++) { const i = r * cols + c; if (carCols && carCols.includes(c)) { newHazards.set(i, lane.dir); } else { applyStyle(i, grassColor[i], grassScale[i]); } } } for (const i of hazardIdxs) { if (!newHazards.has(i)) clearHazard(i); } for (const [i, dir] of newHazards) { paintHazard(i, dir); } hazardIdxs = new Set(newHazards.keys());
const pIdx = player.row * cols + player.col; paintPlayer(pIdx); }
function updateStatus() { if (gameOver) { status.textContent = `Game over — reached level ${level} (best ${bestLevel}). Click the grid to try again.`; return; } if (justWon) { status.textContent = `Level ${level} complete! Best ${bestLevel}`; return; } const filled = "●".repeat(lives); const empty = "○".repeat(Math.max(0, LIVES_START - lives)); const dirLabel = level % 2 === 1 ? "climb up" : "climb down"; const hint = reducedMotion ? "tap/arrows (turn-based)" : "arrows or tap"; status.textContent = `Level ${level}: ${dirLabel} · ${filled}${empty} · Best ${bestLevel} — ${hint}`; }
function ensureAudio() { const AC = window.AudioContext || window.webkitAudioContext; if (!AC) return null; if (!audioCtx) audioCtx = new AC(); if (audioCtx.state === "suspended") audioCtx.resume(); return audioCtx; }
function playTone(freq, duration, type, gainLevel) { const ctx = ensureAudio(); if (!ctx) return; const osc = ctx.createOscillator(); const gain = ctx.createGain(); osc.type = type; osc.frequency.value = freq; gain.gain.value = gainLevel; gain.gain.exponentialRampToValueAtTime(0.0001, ctx.currentTime + duration); osc.connect(gain).connect(ctx.destination); osc.start(); osc.stop(ctx.currentTime + duration); }
function sfxHop() { playTone(520, 0.07, "square", 0.07); }
function sfxHit() { playTone(120, 0.25, "sawtooth", 0.12); }
function sfxWin() { [523, 659, 784, 1047].forEach((freq, i) => { setTimeout(() => playTone(freq, 0.15, "square", 0.09), i * 90); }); }
function sfxGameOver() { playTone(200, 0.35, "sawtooth", 0.1); setTimeout(() => playTone(140, 0.4, "sawtooth", 0.1), 150); }
function checkCollision() { if (gameOver || resolving) return false; const lane = lanes[player.row]; if (lane.type !== "danger") return false; if (!carColumnsFor(lane).includes(player.col)) return false;
resolving = true; lives--; sfxHit(); const hitIdx = player.row * cols + player.col; clearCell(cells[hitIdx]); cells[hitIdx].style.backgroundColor = HIT_COLOR; cells[hitIdx].style.transform = "scale(1.5)"; prevKey[hitIdx] = "hit";
const finalize = () => { resolving = false; if (lives <= 0) { gameOver = true; cancelAnimationFrame(raf); raf = 0; sfxGameOver(); } else { resetPlayer(); } updateStatus(); render(); };
if (reducedMotion) { finalize(); } else { flashTimeoutId = setTimeout(finalize, HIT_FLASH_MS); } return true; }
function win() { clearTimeout(winTimeoutId); resolving = true; justWon = true; sfxWin(); updateStatus(); render(); winTimeoutId = setTimeout(advanceLevel, WIN_PAUSE_MS); }
function advanceLevel() { level++; bestLevel = Math.max(bestLevel, level); justWon = false; resolving = false; buildLanes(); resetPlayer(); prevKey.fill(""); updateStatus(); render(); if (!reducedMotion) { lastTs = 0; if (raf === 0 && visible) raf = requestAnimationFrame(frame); } }
function advanceLanesOneStep() { for (let r = 0; r <= homeRow; r++) { const lane = lanes[r]; if (lane.type !== "danger") continue; const steps = Math.max(1, Math.round(lane.speed)); lane.offset = ((lane.offset + lane.dir * steps) % cols + cols) % cols; } }
function advanceLanesContinuous(dt) { for (let r = 0; r <= homeRow; r++) { const lane = lanes[r]; if (lane.type !== "danger") continue; lane.offset = ((lane.offset + lane.dir * lane.speed * dt) % cols + cols) % cols; } }
function tryMove(dr, dc) { if (gameOver) { newGame(); return; } if (resolving) return; const nr = player.row + dr; const nc = player.col + dc; if (nr < 0 || nr > homeRow) return; const maxCol = colsInRow(nr) - 1; if (nc < 0 || nc > maxCol) return;
player.row = nr; player.col = nc; sfxHop(); if (nr === goalRow()) { win(); return; } let hit = checkCollision(); if (!hit && reducedMotion) { advanceLanesOneStep(); hit = checkCollision(); } render(); updateStatus(); }
function frame(ts) { const dt = lastTs ? (ts - lastTs) / 1000 : 0; lastTs = ts; if (!gameOver && !resolving) { advanceLanesContinuous(dt); checkCollision(); } render(); if (visible && !gameOver) { raf = requestAnimationFrame(frame); } else { raf = 0; } }
function newGame() { level = 1; lives = LIVES_START; gameOver = false; justWon = false; resolving = false; playerElIdx = -1; hazardIdxs = new Set(); cells.forEach(clearCell); prevKey.fill(""); buildLanes(); resetPlayer(); updateStatus(); render(); if (!reducedMotion) { lastTs = 0; if (raf === 0 && visible) raf = requestAnimationFrame(frame); } }
function onKeyDown(e) { const moves = { ArrowUp: [-1, 0], ArrowDown: [1, 0], ArrowLeft: [0, -1], ArrowRight: [0, 1], w: [-1, 0], s: [1, 0], a: [0, -1], d: [0, 1], W: [-1, 0], S: [1, 0], A: [0, -1], D: [0, 1], }; const mv = moves[e.key]; if (!mv) return; e.preventDefault(); tryMove(mv[0], mv[1]); }
function onClick(e) { grid.focus({ preventScroll: true }); if (gameOver) { newGame(); return; } const rect = grid.getBoundingClientRect(); const colF = ((e.clientX - rect.left) / rect.width) * cols; const rowF = ((e.clientY - rect.top) / rect.height) * rows; const dc = colF - (player.col + 0.5); const dr = rowF - (player.row + 0.5); if (Math.abs(dc) > Math.abs(dr)) tryMove(0, dc > 0 ? 1 : -1); else tryMove(dr > 0 ? 1 : -1, 0); }
grid.addEventListener("keydown", onKeyDown); grid.addEventListener("click", onClick);
function rebuild() { cancelAnimationFrame(raf); raf = 0; cols = getCols(); rows = Math.ceil(total / cols); homeRow = total % cols === 0 ? rows - 1 : rows - 2; prevKey = new Array(total).fill(""); newGame(); } wideQuery.addEventListener("change", rebuild);
let io = null; if (!reducedMotion) { io = new IntersectionObserver((entries) => { const nowVisible = entries.some((e) => e.isIntersecting); if (nowVisible === visible) return; visible = nowVisible; if (visible && !gameOver && raf === 0) { lastTs = 0; raf = requestAnimationFrame(frame); } else if (!visible) { cancelAnimationFrame(raf); raf = 0; } }); io.observe(grid); }
newGame();
return () => { cancelAnimationFrame(raf); clearTimeout(flashTimeoutId); clearTimeout(winTimeoutId); grid.removeEventListener("keydown", onKeyDown); grid.removeEventListener("click", onClick); wideQuery.removeEventListener("change", rebuild); if (io) io.disconnect(); grid.removeAttribute("tabindex"); grid.removeAttribute("aria-label"); cells.forEach(clearCell); if (audioCtx) audioCtx.close(); status.remove(); };}
let currentGrid = null;let cleanup = null;function init() { const grid = document.querySelector("[data-punchcard]"); if (grid === currentGrid) return; if (cleanup) cleanup(); currentGrid = grid; cleanup = grid ? setupGame(grid) : null;}init();document.addEventListener("htmx:load", init);