1 files changed, 137 insertions, 0 deletions
diff --git a/src/main.ts b/src/main.ts
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+import './style.css';
+import { defaults, experiments, format, type Experiment, type Parameters } from './experiments';
+import { createLab } from './scene/lab';
+
+const app = document.querySelector<HTMLDivElement>('#app')!;
+app.innerHTML = `
+  <header class="app-header">
+    <a class="brand" href="#field" aria-label="Field Lab home">E<span>/</span>LAB</a>
+    <div class="header-title"><h1>Electrotechnique & Electrophysics</h1><p>Explore the invisible. Understand the physical.</p></div>
+    <span class="status"><i></i> INTERACTIVE LAB</span>
+  </header>
+  <nav class="subjects" aria-label="Electrophysics subjects"><div role="tablist" aria-label="Experiments">${experiments.map((e, index) => `<button type="button" role="tab" id="tab-${e.id}" aria-controls="lesson" aria-selected="false" tabindex="-1" data-experiment="${e.id}"><span>${String(index + 1).padStart(2, '0')}</span>${e.shortTitle}</button>`).join('')}</div></nav>
+  <main id="lesson" role="tabpanel" aria-labelledby="tab-field">
+    <aside class="controls-panel">
+      <p class="eyebrow" id="lesson-number"></p>
+      <h2 id="lesson-title"></h2><p class="description" id="description"></p>
+      <form id="parameters" aria-label="Experiment parameters" onsubmit="return false"></form>
+      <div class="panel-actions"><button type="button" id="reset">Reset experiment</button></div>
+      <section class="measurements" id="measurements" aria-label="Live measurements" aria-live="polite" aria-atomic="true"></section>
+    </aside>
+    <div class="workbench">
+      <section id="viewport" aria-label="3D workbench">
+        <div class="scene-toolbar"><span class="view-tag">3D VIEW</span><div><button type="button" id="camera-reset">Reset camera</button><button type="button" id="pause" aria-pressed="false">Pause animation</button></div></div>
+        <div class="legend" id="legend"></div>
+        <div class="scene-footer"><p id="scene-note"></p><p class="hint">Drag to orbit · Scroll to zoom · Right-drag to pan · Arrow keys to pan when focused</p></div>
+      </section>
+      <section class="learning-panel" aria-label="Learn the physics">
+        <div><p class="eyebrow">THE PHYSICS</p><div id="equations" class="equations"></div><p id="explanation"></p><a id="source" target="_blank" rel="noopener noreferrer"></a></div>
+        <div class="challenge"><p class="eyebrow">TRY THIS</p><p id="challenge"></p><details><summary>Model & visual scales</summary><p id="limits"></p></details></div>
+      </section>
+    </div>
+  </main>`;
+
+const lab = createLab(document.querySelector('#viewport')!);
+const settings = new Map(experiments.map(experiment => [experiment.id, defaults(experiment)]));
+const byId = (id: string) => document.getElementById(id)!;
+let active = experiments[0];
+let paused = window.matchMedia('(prefers-reduced-motion: reduce)').matches;
+function updatePause() {
+  byId('pause').textContent = paused ? 'Resume animation' : 'Pause animation';
+  byId('pause').setAttribute('aria-pressed', String(paused));
+  lab.setPaused(paused);
+}
+updatePause();
+
+function parameters(): Parameters { return settings.get(active.id)!; }
+function update() {
+  const p = parameters();
+  for (const control of active.controls) {
+    if (control.kind !== 'range') continue;
+    byId(`output-${control.id}`).textContent = `${format(Number(p[control.id]), 3)}${control.unit ? ` ${control.unit}` : ''}`;
+  }
+  if (active.id === 'semiconductor') {
+    (byId('parameter-concentration') as HTMLInputElement).disabled = p.doping === 'intrinsic';
+  }
+  byId('measurements').innerHTML = active.measure(p).map(m => `<div class="measurement"><span>${m.label}</span><div><strong aria-label="${m.label}">${m.value}</strong><small>${m.unit}</small></div></div>`).join('');
+  lab.update(active.id, p);
+}
+function show(experiment: Experiment) {
+  active = experiment;
+  const index = experiments.indexOf(experiment);
+  byId('lesson-number').textContent = `EXPERIMENT ${String(index + 1).padStart(2, '0')} / 08`;
+  byId('lesson-title').textContent = experiment.title;
+  byId('description').textContent = experiment.description;
+  byId('scene-note').textContent = experiment.sceneNote;
+  byId('explanation').textContent = experiment.explanation;
+  byId('challenge').textContent = experiment.challenge;
+  byId('limits').textContent = experiment.limits;
+  byId('equations').replaceChildren(...experiment.equations.map(equation => {
+    const div = document.createElement('p');
+    div.textContent = equation;
+    return div;
+  }));
+  const source = byId('source') as HTMLAnchorElement;
+  source.textContent = `${experiment.source.title} ↗`;
+  source.href = experiment.source.url;
+  byId('legend').innerHTML = experiment.legend.map(([colour, text]) => `<span><i style="background:${colour}"></i>${text}</span>`).join('');
+  byId('lesson').setAttribute('aria-labelledby', `tab-${experiment.id}`);
+  document.querySelectorAll<HTMLButtonElement>('[role="tab"]').forEach(tab => {
+    const selected = tab.dataset.experiment === experiment.id;
+    tab.setAttribute('aria-selected', String(selected));
+    tab.tabIndex = selected ? 0 : -1;
+  });
+  const p = parameters();
+  byId('parameters').innerHTML = experiment.controls.map(control => {
+    const id = `parameter-${control.id}`;
+    if (control.kind === 'select') return `<div class="parameter"><label for="${id}">${control.label}</label><select id="${id}" name="${control.id}">${control.options.map(option => `<option value="${option.value}" ${option.value === p[control.id] ? 'selected' : ''}>${option.label}</option>`).join('')}</select></div>`;
+    return `<div class="parameter"><div class="parameter-label"><label for="${id}">${control.label}</label><output for="${id}" id="output-${control.id}"></output></div><input id="${id}" name="${control.id}" type="range" min="${control.min}" max="${control.max}" step="${control.step}" value="${p[control.id]}" /></div>`;
+  }).join('');
+  lab.resetCamera();
+  update();
+}
+function fromHash() {
+  const id = window.location.hash.slice(1);
+  show(experiments.find(experiment => experiment.id === id) ?? experiments[0]);
+}
+const onHashChange = () => fromHash();
+window.addEventListener('hashchange', onHashChange);
+fromHash();
+byId('parameters').addEventListener('input', event => {
+  const input = event.target as HTMLInputElement | HTMLSelectElement;
+  if (!input.name) return;
+  parameters()[input.name] = input.type === 'range' ? Number(input.value) : input.value;
+  update();
+});
+byId('reset').addEventListener('click', () => {
+  settings.set(active.id, defaults(active));
+  show(active);
+});
+byId('camera-reset').addEventListener('click', () => lab.resetCamera());
+byId('pause').addEventListener('click', () => {
+  paused = !paused;
+  updatePause();
+});
+const tabs = [...document.querySelectorAll<HTMLButtonElement>('[role="tab"]')];
+tabs.forEach((tab, index) => {
+  tab.addEventListener('click', () => {
+    const id = tab.dataset.experiment!;
+    if (window.location.hash === `#${id}`) show(experiments[index]);
+    else window.location.hash = id;
+  });
+  tab.addEventListener('keydown', event => {
+    let next: number;
+    if (event.key === 'ArrowRight') next = (index + 1) % tabs.length;
+    else if (event.key === 'ArrowLeft') next = (index - 1 + tabs.length) % tabs.length;
+    else if (event.key === 'Home') next = 0;
+    else if (event.key === 'End') next = tabs.length - 1;
+    else return;
+    event.preventDefault();
+    tabs[next].focus();
+    tabs[next].click();
+  });
+});
+if (import.meta.hot) import.meta.hot.dispose(() => {
+  window.removeEventListener('hashchange', onHashChange);
+  lab.dispose();
+});