Update exhibit
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<!DOCTYPE html>
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<html lang="en">
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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" />
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<title>Newbury Crests — print sheet</title>
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<style>
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:root { --ink:#11131c; --dim:#666; --line:#ccc;
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--red:#f65151; --yellow:#fff35d; --blue:#529eff; }
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* { box-sizing: border-box; }
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html, body { margin: 0; background: #f4f5f7; color: var(--ink);
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font-family: 'Inter', system-ui, sans-serif; }
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/* screen-only control bar */
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#bar { position: sticky; top: 0; z-index: 10; background: #fff;
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border-bottom: 1px solid var(--line); padding: 10px 16px; display: flex;
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align-items: center; gap: 14px; flex-wrap: wrap; box-shadow: 0 1px 4px rgba(0,0,0,0.06); }
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#bar h1 { font-size: 15px; margin: 0; font-weight: 700; }
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#bar h1 span { color: var(--blue); }
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#bar .spacer { flex: 1; }
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#bar label { font-size: 12px; color: var(--dim); display: flex; align-items: center; gap: 5px; }
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#bar input[type=number] { width: 62px; padding: 4px 6px; border: 1px solid var(--line);
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border-radius: 6px; font-family: ui-monospace, monospace; font-size: 12px; }
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#bar button { border: 0; cursor: pointer; font-weight: 600; font-size: 13px;
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padding: 8px 16px; border-radius: 8px; background: #111827; color: #fff; }
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#bar button.ghost { background: #eef0f4; color: #111827; }
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#bar .note { font-size: 11px; color: var(--dim); flex-basis: 100%; }
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#sheet { padding: 16px; }
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.card { background: #fff; border: 1px solid #e3e5ea; border-radius: 10px;
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padding: 14px; margin: 0 auto 14px; max-width: 560px; }
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.card .meta { display: flex; justify-content: space-between; align-items: baseline;
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margin-bottom: 10px; }
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.card .name { font-weight: 700; font-size: 14px; }
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.card .sub { font-family: ui-monospace, monospace; font-size: 11px; color: var(--dim); }
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.marker-wrap { display: flex; gap: 16px; align-items: center; }
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.marker-wrap svg { display: block; }
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.card .facts { font-size: 11px; color: var(--dim); line-height: 1.6; }
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.card .facts b { color: var(--ink); }
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.warn { color: #b45309; font-size: 11px; margin-top: 6px; }
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#empty { text-align: center; color: var(--dim); padding: 60px 20px; }
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@media print {
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#bar { display: none; }
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body, html { background: #fff; }
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#sheet { padding: 0; }
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.card { border: none; box-shadow: none; page-break-inside: avoid;
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max-width: none; margin: 0 0 8mm; padding: 0; }
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/* cut guides show in print */
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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="bar">
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<h1>Newbury <span>Crests</span> — print sheet</h1>
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<div class="spacer"></div>
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<label>cell size
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<input id="cellMm" type="number" value="16" min="6" max="40" step="1" /> mm
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</label>
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<label><input id="showRing" type="checkbox" checked /> colour ring</label>
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<label><input id="showGuides" type="checkbox" checked /> cut guides</label>
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<button class="ghost" id="reloadBtn">Reload anchors</button>
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<button id="printBtn">Print</button>
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<div class="note">Print at <b>100% / actual size</b> (no "fit to page"). Measure a printed marker to confirm scale before building. Matte paper or matte UV — avoid gloss (glare breaks detection).</div>
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</div>
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<div id="sheet"><div id="empty">Loading anchors…</div></div>
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<!-- vendored ArUco dictionary for the exact bit patterns -->
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<script src="vendor/dictionaries/aruco_4x4_1000.js"></script>
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<script>
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(function () {
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'use strict';
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const LURE = { Red: '#f65151', Yellow: '#fff35d', Blue: '#529eff' };
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const RING_CYCLE = ['Red', 'Yellow', 'Blue'];
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const DPI = 96; // CSS px per inch
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const MM_PER_IN = 25.4;
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const pxPerMm = DPI / MM_PER_IN; // ~3.78 px/mm at 96dpi
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// Build a 6x6 bit grid (0=black,1=white) for an ArUco 4x4 id.
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// Outer ring is the quiet border (all black); inner 4x4 = the code bits.
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function grid6(id) {
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const dict = (window.AR && AR.DICTIONARIES && AR.DICTIONARIES.ARUCO_4X4_1000)
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? AR.DICTIONARIES.ARUCO_4X4_1000 : null;
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// js-aruco exposes the dictionary via AR.Dictionary; build one to read codeList
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const d = new AR.Dictionary('ARUCO_4X4_1000');
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const code = d.codeList[id];
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if (!code) return null;
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const g = [];
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for (let y = -1; y <= 4; y++) {
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const row = [];
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for (let x = -1; x <= 4; x++) {
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if (y < 0 || y > 3 || x < 0 || x > 3) row.push(0); // black border
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else row.push(code[y * 4 + x] === '1' ? 1 : 0); // data bit
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}
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g.push(row);
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}
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return g;
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}
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function markerSVG(id, cellMm, showRing, showGuides) {
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const core = grid6(id);
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if (!core) return `<div class="warn">No pattern for id ${id} (out of range).</div>`;
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const cell = cellMm * pxPerMm;
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const ringCells = showRing ? 1 : 0;
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const n = 6 + ringCells * 2; // total cells across
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const dim = n * cell;
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const guide = showGuides ? cell * 0.5 : 0; // margin for cut guides
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const total = dim + guide * 2;
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let s = `<svg width="${total}" height="${total}" viewBox="0 0 ${total} ${total}" xmlns="http://www.w3.org/2000/svg">`;
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s += `<rect width="${total}" height="${total}" fill="#ffffff"/>`;
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// colour-wheel ring (decorative, outside the detector core)
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if (showRing) {
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let ci = 0;
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for (let y = 0; y < n; y++) for (let x = 0; x < n; x++) {
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const isRing = (x === 0 || y === 0 || x === n - 1 || y === n - 1);
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if (!isRing) continue;
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const col = LURE[RING_CYCLE[ci % RING_CYCLE.length]]; ci++;
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s += `<rect x="${guide + x * cell}" y="${guide + y * cell}" width="${cell}" height="${cell}" fill="${col}"/>`;
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}
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}
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// detector core 6x6 (inset by the ring)
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for (let y = 0; y < 6; y++) for (let x = 0; x < 6; x++) {
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const fill = core[y][x] ? '#ffffff' : '#000000';
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const px = guide + (x + ringCells) * cell;
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const py = guide + (y + ringCells) * cell;
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s += `<rect x="${px}" y="${py}" width="${cell}" height="${cell}" fill="${fill}"/>`;
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}
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// cut guides (corner crop marks)
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if (showGuides) {
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const gl = guide * 0.8, gt = 1;
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const marks = [
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[0, 0, 1, 1], [total, 0, -1, 1], [0, total, 1, -1], [total, total, -1, -1],
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];
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for (const [cx, cy, dx, dy] of marks) {
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s += `<line x1="${cx}" y1="${cy}" x2="${cx + dx * gl}" y2="${cy}" stroke="#999" stroke-width="${gt}"/>`;
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s += `<line x1="${cx}" y1="${cy}" x2="${cx}" y2="${cy + dy * gl}" stroke="#999" stroke-width="${gt}"/>`;
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}
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}
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s += '</svg>';
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return s;
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}
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let anchors = [];
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async function loadAnchors() {
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const el = document.getElementById('sheet');
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try {
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const res = await fetch('/api/scene');
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const scene = await res.json();
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anchors = scene.anchors || [];
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} catch (e) {
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el.innerHTML = `<div id="empty">Couldn't load /api/scene: ${e.message}</div>`;
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return;
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}
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render();
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}
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function render() {
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const el = document.getElementById('sheet');
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const cellMm = parseFloat(document.getElementById('cellMm').value) || 16;
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const showRing = document.getElementById('showRing').checked;
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const showGuides = document.getElementById('showGuides').checked;
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if (!anchors.length) { el.innerHTML = `<div id="empty">No anchors in the scene yet. Add some in the workshop, then reload.</div>`; return; }
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el.innerHTML = anchors.map((a) => {
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const id = a.fiducialId ?? 0;
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const coreMm = cellMm * 6;
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const fullMm = showRing ? cellMm * 8 : coreMm;
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const typeWarn = (a.fiducialType && a.fiducialType !== 'aruco')
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? `<div class="warn">⚠ This anchor is set to "${a.fiducialType}", but detection uses ArUco 4×4. Set it to <b>aruco</b> in the workshop, or this printed marker won't match.</div>`
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: '';
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const scaleWarn = (a.fiducialSizeMm && Math.abs(a.fiducialSizeMm - coreMm) > 1)
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? `<div class="warn">⚠ Anchor size is <b>${a.fiducialSizeMm}mm</b> but this prints the core at <b>${coreMm}mm</b> (cell ${cellMm}×6). Match them so pose scale is right: set cell to ${(a.fiducialSizeMm/6).toFixed(1)}mm or the anchor size to ${coreMm}mm.</div>`
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: '';
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return `
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<div class="card">
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<div class="meta">
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<span class="name">${a.label || a.id}</span>
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<span class="sub">ArUco 4×4 · id ${id}</span>
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</div>
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<div class="marker-wrap">
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${markerSVG(id, cellMm, showRing, showGuides)}
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<div class="facts">
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core <b>${coreMm}mm</b> (6×${cellMm}mm)<br/>
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${showRing ? `with ring <b>${fullMm}mm</b><br/>` : ''}
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world pos <b>${Math.round(a.position?.x ?? 0)}, ${Math.round(a.position?.z ?? 0)}</b> mm<br/>
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anchor id <span class="sub">${a.id}</span>
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</div>
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</div>
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${typeWarn}${scaleWarn}
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</div>`;
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}).join('');
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}
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document.getElementById('cellMm').addEventListener('input', render);
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document.getElementById('showRing').addEventListener('change', render);
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document.getElementById('showGuides').addEventListener('change', render);
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document.getElementById('reloadBtn').addEventListener('click', loadAnchors);
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document.getElementById('printBtn').addEventListener('click', () => window.print());
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loadAnchors();
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})();
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</script>
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</body>
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</html>
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