JianMiauandClaude Fable 5
77fff4326c
根本原因： iOS 27 Beta 的 WebKit 回歸使 tfjs 打包著色器連結失敗 （Failed to link vertex and fragment shaders），MindAR 辨識引擎 啟動時無聲掛掉；相機畫面只是一般 video 元素照常顯示， 使用者看到的症狀就是「掃描完全沒反應」。錯誤只進 console， 行動裝置上看不到，導致先前無從排查。 影響： iOS 27 Beta 裝置無論掃哪張照片都不會觸發辨識；iOS 26 與桌面正常。 修法： 1. 在 MindAR 載入前偵測 iOS 裝置，自動把 tfjsflags=WEBGL_PACK:false 補進網址（tfjs 由 query string 讀取設定），改用未打包著色器， 已在 iOS 27 Beta 實機驗證可正常辨識；網址手動帶 tfjsflags 時不覆蓋。 2. 未攔截的 JS 錯誤改以紅色橫幅直接顯示在畫面頂端；網址加 ?debug 可在畫面底部看到掃描過程（目標數、相機解析度、targetFound/Lost、 console 訊息），行動裝置也能自行排查。版本字樣升至 v8。 Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
314 lines
12 KiB
HTML
314 lines
12 KiB
HTML
<!doctype html>
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<html lang="zh-Hant">
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<head>
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<meta charset="utf-8">
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<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, user-scalable=no">
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<title>動態相片</title>
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<script>
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// iOS 27 Beta 的 WebKit 會讓 tfjs 打包著色器連結失敗
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// （Failed to link vertex and fragment shaders，辨識引擎無聲掛掉），
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// 改用未打包著色器可正常運作。必須在 MindAR 載入前把 tfjsflags
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// 補進網址，tfjs 是從 query string 讀取這個設定的；
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// 網址已手動帶 tfjsflags 時不覆蓋，方便之後實驗其他參數
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(() => {
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const isIOS = /iPhone|iPad|iPod/.test(navigator.userAgent) ||
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(navigator.platform === 'MacIntel' && navigator.maxTouchPoints > 1);
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if (isIOS && !location.search.includes('tfjsflags')) {
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const q = location.search ? location.search + '&' : '?';
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history.replaceState(null, '', q + 'tfjsflags=WEBGL_PACK:false' + location.hash);
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}
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})();
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</script>
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<script src="/vendor/aframe.min.js"></script>
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<script src="/vendor/mindar-image-aframe.prod.js"></script>
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<style>
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/* 背景只能放在 html（root canvas），不能放在 body：
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MindAR 的相機 video 是 body 下 z-index:-2 的元素，body 自己的背景會蓋住它 */
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html { background: #000; }
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html, body { margin: 0; padding: 0; width: 100%; height: 100%; overflow: hidden; }
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#overlay {
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position: fixed; inset: 0; z-index: 1000;
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display: flex; flex-direction: column; align-items: center; justify-content: center;
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gap: 16px; padding: 24px; text-align: center;
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background: radial-gradient(circle at 50% 30%, #1c2333, #0b0e16 70%);
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color: #e8ecf5; font-family: system-ui, -apple-system, "Noto Sans TC", sans-serif;
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}
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#overlay.hidden { display: none; }
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#overlay h1 { margin: 0; font-size: 28px; font-weight: 700; letter-spacing: 2px; }
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#status { margin: 0; font-size: 15px; color: #9aa4bd; min-height: 1.4em; }
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#startBtn {
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padding: 14px 48px; font-size: 18px; font-weight: 600; letter-spacing: 4px;
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color: #0b0e16; background: #e8ecf5; border: none; border-radius: 999px; cursor: pointer;
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}
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#startBtn:active { transform: scale(0.97); }
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.hint { font-size: 13px; color: #6b7590; max-width: 320px; line-height: 1.7; }
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#stopBtn {
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position: fixed; top: 16px; right: 16px; z-index: 1001;
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width: 40px; height: 40px; border-radius: 50%; border: none; cursor: pointer;
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background: rgba(0,0,0,.5); color: #fff; font-size: 18px; display: none;
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}
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#dlBtn {
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position: fixed; bottom: 24px; right: 16px; z-index: 1001;
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width: 52px; height: 52px; border-radius: 50%;
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background: rgba(0,0,0,.55); color: #fff; font-size: 24px;
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display: none; align-items: center; justify-content: center;
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text-decoration: none; box-shadow: 0 2px 8px rgba(0,0,0,.4);
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}
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#dlBtn:active { transform: scale(0.94); }
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a { color: #8fb4ff; }
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#errBox {
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position: fixed; top: 0; left: 0; right: 0; z-index: 2000;
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display: none; padding: 10px 14px;
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background: rgba(170, 32, 32, .92); color: #fff;
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font: 12px/1.6 monospace; white-space: pre-wrap; word-break: break-all;
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max-height: 45%; overflow: auto;
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}
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#dbgBox {
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position: fixed; bottom: 0; left: 0; z-index: 2000;
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display: none; padding: 8px 12px; max-width: 100%;
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background: rgba(0, 0, 0, .6); color: #9f9;
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font: 11px/1.5 monospace; white-space: pre-wrap; word-break: break-all;
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max-height: 40%; overflow: auto;
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}
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</style>
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</head>
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<body>
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<div id="overlay">
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<h1>動態相片</h1>
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<p id="status">載入中…</p>
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<button id="startBtn" hidden>開始掃描</button>
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<p class="hint">按下開始後，將相機對準已登錄的照片，<br>對應的影片就會覆蓋在照片上播放。</p>
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<p class="hint" style="font-size:11px">v8</p>
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</div>
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<button id="stopBtn" title="停止">✕</button>
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<a id="dlBtn" title="下載影片" download>⬇</a>
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<div id="errBox"></div>
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<div id="dbgBox"></div>
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<script>
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const overlay = document.getElementById('overlay');
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const statusEl = document.getElementById('status');
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const startBtn = document.getElementById('startBtn');
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const stopBtn = document.getElementById('stopBtn');
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const dlBtn = document.getElementById('dlBtn');
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const errBox = document.getElementById('errBox');
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const dbgBox = document.getElementById('dbgBox');
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// 掃描在某些裝置上「沒反應」時，錯誤常常只進 console 看不到。
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// 這裡把所有未攔截的錯誤直接顯示在畫面頂端，行動裝置也能看到
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function showErr(msg) {
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errBox.style.display = 'block';
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errBox.textContent += (errBox.textContent ? '\n' : '') + msg;
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}
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window.addEventListener('error', (e) => {
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showErr('錯誤：' + (e.message || String(e.error || '未知')));
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});
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window.addEventListener('unhandledrejection', (e) => {
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const r = e.reason;
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showErr('錯誤：' + ((r && r.message) || String(r)));
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});
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// 網址加 ?debug 會在畫面底部顯示掃描過程（相機解析度、targetFound 等）
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const DEBUG = new URLSearchParams(location.search).has('debug');
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function dbg(msg) {
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if (!DEBUG) return;
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dbgBox.style.display = 'block';
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const t = (performance.now() / 1000).toFixed(1);
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dbgBox.textContent += `[${t}s] ${msg}\n`;
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dbgBox.scrollTop = dbgBox.scrollHeight;
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}
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// debug 模式下把 console 訊息也收進畫面：
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// tfjs 著色器編譯失敗的詳細原因只會 console.log，行動裝置上否則看不到
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if (DEBUG) {
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for (const level of ['log', 'warn', 'error']) {
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const orig = console[level].bind(console);
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console[level] = (...args) => {
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orig(...args);
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try {
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const text = args.map((a) => typeof a === 'string' ? a : JSON.stringify(a)).join(' ');
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if (text && !text.startsWith('%c')) dbg(`console.${level}: ${text.slice(0, 400)}`);
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} catch {}
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};
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}
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}
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let sceneEl = null;
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const videos = [];
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async function init() {
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let state;
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try {
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state = await (await fetch('/api/state')).json();
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} catch (e) {
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statusEl.textContent = '無法連線到伺服器';
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return;
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}
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const adminUrl = `http://${location.hostname}:${state.ports.admin}/`;
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if (!state.targets || !state.targets.targets.length) {
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statusEl.innerHTML = `尚未建立任何動態相片。<br>請先到 <a href="${adminUrl}">管理頁</a> 新增照片與影片並編譯。`;
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return;
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}
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if (!window.isSecureContext) {
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statusEl.innerHTML = '瀏覽器要求安全連線才能開啟相機，<br>請改用 <b>https://</b> 連到本頁。';
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return;
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}
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const pairById = Object.fromEntries(state.pairs.map(p => [p.id, p]));
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const entries = state.targets.targets
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.map((t, index) => ({ ...t, index, pair: pairById[t.pairId] }))
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.filter(t => t.pair);
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if (!entries.length) {
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statusEl.innerHTML = `目標檔已過期，請到 <a href="${adminUrl}">管理頁</a> 重新編譯。`;
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return;
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}
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dbg(`state 載入完成：${entries.length} 個目標，編譯於 ${new Date(state.targets.compiledAt).toLocaleString()}`);
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buildScene(state.targets.compiledAt, entries);
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statusEl.textContent = '';
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startBtn.hidden = false;
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}
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function buildScene(version, entries) {
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sceneEl = document.createElement('a-scene');
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sceneEl.setAttribute('mindar-image',
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`imageTargetSrc: /data/targets.mind?v=${version}; autoStart: false; maxTrack: 1; ` +
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'filterMinCF: 0.0001; filterBeta: 0.001; uiLoading: no; uiScanning: no; uiError: yes;');
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sceneEl.setAttribute('embedded', '');
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sceneEl.setAttribute('color-space', 'sRGB');
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sceneEl.setAttribute('renderer', 'colorManagement: true; physicallyCorrectLights: true');
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sceneEl.setAttribute('vr-mode-ui', 'enabled: false');
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sceneEl.setAttribute('device-orientation-permission-ui', 'enabled: false');
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const assets = document.createElement('a-assets');
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sceneEl.appendChild(assets);
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const camera = document.createElement('a-camera');
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camera.setAttribute('position', '0 0 0');
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camera.setAttribute('look-controls', 'enabled: false');
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sceneEl.appendChild(camera);
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for (const t of entries) {
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const video = document.createElement('video');
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video.id = 'vid-' + t.index;
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video.src = '/data/videos/' + encodeURIComponent(t.pair.video);
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video.loop = true;
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video.preload = 'auto';
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video.crossOrigin = 'anonymous';
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video.setAttribute('playsinline', '');
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video.setAttribute('webkit-playsinline', '');
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// 影片一律以靜音狀態建立，直到第一次掃到照片才解除靜音，
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// 確保解鎖過程無論發生什麼載入競態都不可能出聲
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video.muted = true;
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video.defaultMuted = true;
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video.setAttribute('muted', '');
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assets.appendChild(video);
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videos.push(video);
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const anchor = document.createElement('a-entity');
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anchor.setAttribute('mindar-image-target', 'targetIndex: ' + t.index);
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// MindAR 的目標寬度固定為 1，用照片長寬比讓影片剛好蓋住整張照片
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const plane = document.createElement('a-video');
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plane.setAttribute('src', '#vid-' + t.index);
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plane.setAttribute('width', '1');
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plane.setAttribute('height', String(t.aspect || 1));
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plane.setAttribute('position', '0 0 0');
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anchor.appendChild(plane);
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let isFound = false;
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// 保險：照片不在畫面上時若影片意外開始播放，立刻壓回去
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video.addEventListener('playing', () => {
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if (!isFound) {
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video.pause();
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video.currentTime = 0;
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}
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});
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anchor.addEventListener('targetFound', () => {
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dbg(`targetFound：#${t.index}（${t.pair.name}）`);
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isFound = true;
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video.muted = false; // 掃到照片這一刻才解除靜音
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video.defaultMuted = false;
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video.removeAttribute('muted');
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video.play().catch(() => {
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video.muted = true; // 有聲播放被瀏覽器擋下時退回靜音播放
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video.play().catch(() => {});
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});
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// 右下角出現下載按鈕，可下載最後掃到的影片
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dlBtn.href = video.src;
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dlBtn.setAttribute('download', t.pair.name + t.pair.video.slice(t.pair.video.lastIndexOf('.')));
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dlBtn.style.display = 'flex';
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});
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anchor.addEventListener('targetLost', () => {
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dbg(`targetLost：#${t.index}`);
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isFound = false;
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video.pause();
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});
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sceneEl.appendChild(anchor);
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}
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document.body.appendChild(sceneEl);
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}
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startBtn.addEventListener('click', async () => {
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startBtn.disabled = true;
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statusEl.textContent = '啟動相機中…';
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// 在使用者手勢中先 play/pause 一次，解鎖行動裝置的自動播放限制
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// （解鎖許可綁定各個影片元素，之後掃到照片才能自動帶聲音播放）。
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// 影片維持靜音，直到 targetFound 才解除，解鎖過程絕不出聲
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for (const v of videos) {
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// 重新靜音（之前掃到過照片的影片會處於未靜音狀態）
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v.muted = true;
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v.defaultMuted = true;
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v.setAttribute('muted', '');
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try {
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await v.play();
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v.pause();
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v.currentTime = 0;
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} catch {
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// 靜音播放被擋下也無妨，掃到照片時會再嘗試播放
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}
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}
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// 保險：AR 引擎就緒時把所有影片壓回暫停歸零，任何啟動期間的意外播放都會被停掉
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sceneEl.addEventListener('arReady', () => {
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for (const v of videos) {
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if (!v.paused) v.pause();
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v.currentTime = 0;
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}
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// MindAR 的相機 video 是掛在 body 下、沒有 id 的那個元素
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const cam = document.querySelector('body > video');
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dbg('arReady：辨識引擎啟動' + (cam ? `，相機 ${cam.videoWidth}x${cam.videoHeight}` : ''));
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}, { once: true });
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sceneEl.addEventListener('arError', () => {
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showErr('AR 啟動失敗（arError）：通常是相機無法開啟或 WebGL 資源不足');
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}, { once: true });
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const start = () => {
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const sys = sceneEl.systems['mindar-image-system'];
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sys.start();
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overlay.classList.add('hidden');
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stopBtn.style.display = 'block';
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};
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if (sceneEl.hasLoaded) start();
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else sceneEl.addEventListener('loaded', start, { once: true });
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});
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stopBtn.addEventListener('click', () => {
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try { sceneEl.systems['mindar-image-system'].stop(); } catch {}
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for (const v of videos) v.pause();
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stopBtn.style.display = 'none';
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dlBtn.style.display = 'none';
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overlay.classList.remove('hidden');
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startBtn.disabled = false;
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statusEl.textContent = '已停止，可再次開始掃描';
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});
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init();
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</script>
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</body>
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</html>
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