test/github_pages_3_d_lens_model.html at main · nukelon/test · GitHub

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<!doctype html>
<html lang="zh-CN">
<head>
  <meta charset="utf-8" />
  <meta name="viewport" content="width=device-width, initial-scale=1" />
  <title>3D 圆镜片模型｜近视 / 远视 / 散光矫治镜片可视化</title>
  <style>
    :root {
      color-scheme: dark;
      --bg: #070a12;
      --panel: rgba(16, 23, 42, 0.78);
      --panel2: rgba(30, 41, 59, 0.72);
      --line: rgba(148, 163, 184, 0.25);
      --text: #e5e7eb;
      --muted: #94a3b8;
      --accent: #38bdf8;
      --accent2: #a78bfa;
      --good: #34d399;
      --warn: #fbbf24;
      --bad: #fb7185;
      --shadow: 0 20px 60px rgba(0, 0, 0, 0.35);
      --radius: 18px;
      font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", sans-serif;
    }

    * { box-sizing: border-box; }

    html, body {
      margin: 0;
      height: 100%;
      overflow: hidden;
      background:
        radial-gradient(circle at 20% 10%, rgba(56, 189, 248, 0.14), transparent 34%),
        radial-gradient(circle at 80% 4%, rgba(167, 139, 250, 0.16), transparent 32%),
        linear-gradient(145deg, #05070d 0%, #0b1020 48%, #070a12 100%);
      color: var(--text);
    }

    button, input, select {
      font: inherit;
    }

    .app {
      height: 100%;
      display: grid;
      grid-template-columns: minmax(0, 1fr) 390px;
      gap: 14px;
      padding: 14px;
    }

    .stage {
      position: relative;
      min-width: 0;
      border: 1px solid var(--line);
      border-radius: var(--radius);
      overflow: hidden;
      background: rgba(2, 6, 23, 0.46);
      box-shadow: var(--shadow);
    }

    #viewport {
      width: 100%;
      height: 100%;
      min-height: 360px;
    }

    .title-card {
      position: absolute;
      left: 16px;
      top: 16px;
      max-width: min(560px, calc(100% - 32px));
      padding: 13px 14px;
      border-radius: 16px;
      background: rgba(15, 23, 42, 0.70);
      border: 1px solid rgba(148, 163, 184, 0.23);
      backdrop-filter: blur(16px);
      pointer-events: none;
    }

    .title-card h1 {
      margin: 0 0 7px;
      font-size: 18px;
      letter-spacing: 0.02em;
    }

    .title-card p {
      margin: 0;
      color: var(--muted);
      font-size: 13px;
      line-height: 1.55;
    }

    .legend {
      position: absolute;
      left: 16px;
      bottom: 16px;
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      pointer-events: none;
    }

    .pill {
      display: inline-flex;
      align-items: center;
      gap: 7px;
      padding: 7px 9px;
      border-radius: 999px;
      background: rgba(15, 23, 42, 0.72);
      border: 1px solid rgba(148, 163, 184, 0.22);
      color: var(--muted);
      font-size: 12px;
      backdrop-filter: blur(14px);
    }

    .dot {
      width: 9px;
      height: 9px;
      border-radius: 50%;
      display: inline-block;
      background: var(--accent);
    }

    .dot.axis { background: #fb7185; }
    .dot.perp { background: #fbbf24; }
    .dot.ray { background: #38bdf8; }

    .panel {
      min-width: 0;
      height: 100%;
      overflow: hidden;
      display: flex;
      flex-direction: column;
      border: 1px solid var(--line);
      border-radius: var(--radius);
      background: var(--panel);
      box-shadow: var(--shadow);
      backdrop-filter: blur(18px);
    }

    .panel-header {
      padding: 16px 16px 12px;
      border-bottom: 1px solid rgba(148, 163, 184, 0.18);
    }

    .panel-header h2 {
      margin: 0 0 8px;
      font-size: 16px;
    }

    .panel-header .sub {
      margin: 0;
      color: var(--muted);
      font-size: 12.5px;
      line-height: 1.5;
    }

    .controls {
      padding: 14px 14px 18px;
      overflow: auto;
    }

    .group {
      margin-bottom: 13px;
      padding: 12px;
      border: 1px solid rgba(148, 163, 184, 0.18);
      border-radius: 16px;
      background: rgba(15, 23, 42, 0.45);
    }

    .group h3 {
      margin: 0 0 12px;
      font-size: 13px;
      color: #dbeafe;
      letter-spacing: 0.01em;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 8px;
    }

    .row {
      display: grid;
      grid-template-columns: 118px minmax(0, 1fr) 76px;
      gap: 10px;
      align-items: center;
      margin: 10px 0;
    }

    .row label {
      color: var(--muted);
      font-size: 12.5px;
      line-height: 1.25;
    }

    input[type="range"] {
      width: 100%;
      accent-color: var(--accent);
    }

    input[type="number"], select {
      width: 100%;
      border: 1px solid rgba(148, 163, 184, 0.24);
      background: rgba(2, 6, 23, 0.55);
      color: var(--text);
      border-radius: 10px;
      padding: 7px 8px;
      outline: none;
    }

    input[type="number"]:focus, select:focus {
      border-color: rgba(56, 189, 248, 0.75);
      box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.12);
    }

    .select-row {
      display: grid;
      grid-template-columns: 118px minmax(0, 1fr);
      gap: 10px;
      align-items: center;
      margin: 8px 0 12px;
    }

    .check-row {
      display: flex;
      align-items: center;
      gap: 8px;
      margin: 9px 0;
      color: var(--muted);
      font-size: 12.5px;
      user-select: none;
    }

    input[type="checkbox"] {
      accent-color: var(--accent);
      width: 16px;
      height: 16px;
    }

    .mini-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 8px;
      margin-top: 8px;
    }

    .btn {
      border: 1px solid rgba(148, 163, 184, 0.24);
      background: rgba(2, 6, 23, 0.45);
      color: var(--text);
      border-radius: 12px;
      padding: 9px 10px;
      cursor: pointer;
      transition: transform 120ms ease, border-color 120ms ease, background 120ms ease;
    }

    .btn:hover {
      transform: translateY(-1px);
      border-color: rgba(56, 189, 248, 0.55);
      background: rgba(14, 165, 233, 0.12);
    }

    .stats {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 8px;
    }

    .stat {
      padding: 10px;
      border-radius: 13px;
      background: rgba(2, 6, 23, 0.48);
      border: 1px solid rgba(148, 163, 184, 0.14);
    }

    .stat .k {
      display: block;
      color: var(--muted);
      font-size: 11.5px;
      margin-bottom: 5px;
    }

    .stat .v {
      font-size: 14px;
      color: var(--text);
      font-variant-numeric: tabular-nums;
    }

    .rx {
      padding: 10px 11px;
      margin-top: 10px;
      border-radius: 13px;
      background: linear-gradient(135deg, rgba(56, 189, 248, 0.12), rgba(167, 139, 250, 0.10));
      border: 1px solid rgba(56, 189, 248, 0.18);
      color: #e0f2fe;
      font-size: 12.5px;
      line-height: 1.55;
    }

    .formula {
      margin-top: 10px;
      padding: 10px 11px;
      border-radius: 13px;
      background: rgba(2, 6, 23, 0.42);
      border: 1px dashed rgba(148, 163, 184, 0.28);
      color: var(--muted);
      font-size: 12.3px;
      line-height: 1.55;
    }

    code {
      color: #bae6fd;
      background: rgba(56, 189, 248, 0.10);
      padding: 1px 5px;
      border-radius: 6px;
    }

    .toast {
      position: absolute;
      right: 16px;
      bottom: 16px;
      opacity: 0;
      transform: translateY(8px);
      transition: all 180ms ease;
      padding: 10px 12px;
      border-radius: 12px;
      background: rgba(15, 23, 42, 0.80);
      border: 1px solid rgba(148, 163, 184, 0.25);
      color: #dbeafe;
      font-size: 12.5px;
      pointer-events: none;
      backdrop-filter: blur(14px);
    }

    .toast.show {
      opacity: 1;
      transform: translateY(0);
    }

    .warning {
      color: var(--warn);
    }

    @media (max-width: 980px) {
      html, body { overflow: auto; }
      .app {
        height: auto;
        min-height: 100%;
        grid-template-columns: 1fr;
      }
      .stage { height: 62vh; min-height: 460px; }
      .panel { height: auto; overflow: visible; }
      .controls { overflow: visible; }
    }

    @media (max-width: 560px) {
      .app { padding: 9px; gap: 9px; }
      .stage { min-height: 430px; }
      .title-card { left: 10px; top: 10px; }
      .legend { left: 10px; bottom: 10px; }
      .row { grid-template-columns: 96px minmax(0, 1fr) 64px; gap: 7px; }
      .select-row { grid-template-columns: 96px minmax(0, 1fr); }
      .stats { grid-template-columns: 1fr; }
    }
  </style>
</head>
<body>
  <main class="app">
    <section class="stage" aria-label="3D 镜片视图">
      <div id="viewport"></div>
      <div class="title-card">
        <h1>3D 圆镜片模型</h1>
        <p>近视用负球镜：边缘更厚；远视用正球镜：中心更厚；散光用柱镜：不同方向曲率不同。拖拽旋转，滚轮缩放，右键平移。</p>
      </div>
      <div class="legend">
        <span class="pill"><span class="dot axis"></span>红线：柱镜轴位</span>
        <span class="pill"><span class="dot perp"></span>黄线：柱镜最大作用方向</span>
        <span class="pill"><span class="dot ray"></span>蓝线：光线示意</span>
      </div>
      <div class="toast" id="toast">已复制</div>
    </section>

    <aside class="panel">
      <div class="panel-header">
        <h2>参数控制</h2>
        <p class="sub">这是可视化模型，不等同于真实镜片加工数据；横向缩放和曲率夸张用于让形变更容易观察。</p>
      </div>

      <div class="controls">
        <section class="group">
          <h3>处方与镜片类型</h3>
          <div class="select-row">
            <label for="preset">快速预设</label>
            <select id="preset">
              <option value="custom">自定义</option>
              <option value="myopia">近视矫正：-3.00D 球镜</option>
              <option value="hyperopia">远视矫正：+3.00D 球镜</option>
              <option value="astigMinus">近视散光：-2.00D / -1.50D × 180</option>
              <option value="astigPlus">远视散光：+2.00D / +1.50D × 90</option>
              <option value="mixed">混合散光：+1.00D / -3.00D × 45</option>
            </select>
          </div>

          <div class="row">
            <label for="sphere">球镜 S / D</label>
            <input id="sphereRange" type="range" min="-12" max="12" step="0.25" value="-3" />
            <input id="sphere" type="number" min="-12" max="12" step="0.25" value="-3" />
          </div>
          <div class="row">
            <label for="cylinder">柱镜 C / D</label>
            <input id="cylinderRange" type="range" min="-8" max="8" step="0.25" value="0" />
            <input id="cylinder" type="number" min="-8" max="8" step="0.25" value="0" />
          </div>
          <div class="row">
            <label for="axis">轴位 Axis / °</label>
            <input id="axisRange" type="range" min="0" max="180" step="1" value="180" />
            <input id="axis" type="number" min="0" max="180" step="1" value="180" />
          </div>
        </section>

        <section class="group">
          <h3>几何参数</h3>
          <div class="row">
            <label for="diameter">镜片直径 / mm</label>
            <input id="diameterRange" type="range" min="35" max="85" step="1" value="65" />
            <input id="diameter" type="number" min="35" max="85" step="1" value="65" />
          </div>
          <div class="row">
            <label for="baseThickness">基础厚度 / mm</label>
            <input id="baseThicknessRange" type="range" min="0.5" max="10" step="0.1" value="2.2" />
            <input id="baseThickness" type="number" min="0.5" max="10" step="0.1" value="2.2" />
          </div>
          <div class="row">
            <label for="minThickness">最小厚度 / mm</label>
            <input id="minThicknessRange" type="range" min="0.2" max="5" step="0.1" value="0.8" />
            <input id="minThickness" type="number" min="0.2" max="5" step="0.1" value="0.8" />
          </div>
          <div class="row">
            <label for="refractiveIndex">折射率 n</label>
            <input id="refractiveIndexRange" type="range" min="1.49" max="1.74" step="0.01" value="1.60" />
            <input id="refractiveIndex" type="number" min="1.49" max="1.74" step="0.01" value="1.60" />
          </div>
          <label class="check-row">
            <input id="autoMin" type="checkbox" checked /> 自动平移厚度，让最薄处等于“最小厚度”
          </label>
        </section>

        <section class="group">
          <h3>可视化增强</h3>
          <div class="row">
            <label for="xScale">横向缩放 ×</label>
            <input id="xScaleRange" type="range" min="0.5" max="6" step="0.05" value="1.00" />
            <input id="xScale" type="number" min="0.5" max="6" step="0.05" value="1.00" />
          </div>
          <div class="row">
            <label for="curveGain">曲率夸张 ×</label>
            <input id="curveGainRange" type="range" min="0.1" max="8" step="0.05" value="1.60" />
            <input id="curveGain" type="number" min="0.1" max="8" step="0.05" value="1.60" />
          </div>
          <div class="row">
            <label for="opacity">透明度</label>
            <input id="opacityRange" type="range" min="0.18" max="1" step="0.01" value="0.64" />
            <input id="opacity" type="number" min="0.18" max="1" step="0.01" value="0.64" />
          </div>
          <div class="row">
            <label for="resolution">网格精度</label>
            <input id="resolutionRange" type="range" min="24" max="110" step="2" value="46" />
            <input id="resolution" type="number" min="24" max="110" step="2" value="46" />
          </div>
          <label class="check-row">
            <input id="xBoost" type="checkbox" checked /> 横向缩放同时增强形变，使参数变化更明显
          </label>
          <label class="check-row">
            <input id="showWire" type="checkbox" /> 显示网格线
          </label>
          <label class="check-row">
            <input id="showRays" type="checkbox" checked /> 显示光线示意
          </label>
          <label class="check-row">
            <input id="showProfiles" type="checkbox" checked /> 显示水平/垂直截面轮廓
          </label>
          <label class="check-row">
            <input id="showAstigTexture" type="checkbox" checked /> 显示散光曲率纹理，让轴位变化更明显
          </label>
        </section>

        <section class="group">
          <h3>模型读数</h3>
          <div class="stats">
            <div class="stat"><span class="k">最薄处</span><span class="v" id="minOut">-</span></div>
            <div class="stat"><span class="k">最厚处</span><span class="v" id="maxOut">-</span></div>
            <div class="stat"><span class="k">厚度差</span><span class="v" id="diffOut">-</span></div>
            <div class="stat"><span class="k">估算焦距</span><span class="v" id="focusOut">-</span></div>
          </div>
          <div class="rx" id="rxOut">-</div>
          <div class="formula">
            形变核心：<code>厚度轮廓 ∝ -(S · r² + C · p⊥²)</code>。其中 <code>S</code> 为球镜，<code>C</code> 为柱镜，<code>p⊥</code> 是垂直于轴位方向的坐标。负度数让边缘更厚，正度数让中心更厚。
          </div>
          <div class="mini-grid">
            <button class="btn" id="resetView">重置视角</button>
            <button class="btn" id="copyLink">复制参数链接</button>
          </div>
        </section>
      </div>
    </aside>
  </main>

  <script type="importmap">
    {
      "imports": {
        "three": "https://cdn.jsdelivr.net/npm/three@0.160.0/build/three.module.js",
        "three/addons/": "https://cdn.jsdelivr.net/npm/three@0.160.0/examples/jsm/"
      }
    }
  </script>

  <script type="module">
    import * as THREE from 'three';
    import { OrbitControls } from 'three/addons/controls/OrbitControls.js';

    const $ = (id) => document.getElementById(id);

    const paired = [
      'sphere', 'cylinder', 'axis', 'diameter', 'baseThickness', 'minThickness',
      'refractiveIndex', 'xScale', 'curveGain', 'opacity', 'resolution'
    ];

    const UNIT_PER_MM_AT_DEFAULT = 2.2 / 32.5;
    const DEG = Math.PI / 180;

    const viewport = $('viewport');
    const scene = new THREE.Scene();
    scene.background = new THREE.Color(0x070a12);

    const camera = new THREE.PerspectiveCamera(42, 1, 0.05, 100);
    camera.position.set(4.8, -6.4, 3.2);

    const renderer = new THREE.WebGLRenderer({ antialias: true, alpha: true });
    renderer.setPixelRatio(Math.min(window.devicePixelRatio || 1, 2));
    renderer.outputColorSpace = THREE.SRGBColorSpace;
    viewport.appendChild(renderer.domElement);

    const controls = new OrbitControls(camera, renderer.domElement);
    controls.enableDamping = true;
    controls.dampingFactor = 0.07;
    controls.target.set(0, 0, 0);
    camera.lookAt(controls.target);
    controls.update();
    controls.minDistance = 2.2;
    controls.maxDistance = 18;

    const ambient = new THREE.HemisphereLight(0xdbeafe, 0x0f172a, 2.2);
    scene.add(ambient);

    const keyLight = new THREE.DirectionalLight(0xffffff, 2.2);
    keyLight.position.set(4, -5, 7);
    scene.add(keyLight);

    const rimLight = new THREE.DirectionalLight(0x7dd3fc, 1.25);
    rimLight.position.set(-5, 4, 3);
    scene.add(rimLight);

    const grid = new THREE.GridHelper(9, 18, 0x334155, 0x1e293b);
    grid.rotation.x = Math.PI / 2;
    grid.position.z = -1.15;
    grid.material.opacity = 0.28;
    grid.material.transparent = true;
    scene.add(grid);

    let lensGroup = null;
    let currentStats = null;

    function clamp(v, min, max) {
      return Math.min(max, Math.max(min, v));
    }

    function signed(v, digits = 2) {
      const n = Number(v);
      return `${n >= 0 ? '+' : ''}${n.toFixed(digits)}`;
    }

    function formatD(v) {
      return `${signed(v, 2)}D`;
    }

    function getParams() {
      const p = {};
      for (const key of paired) p[key] = Number($(key).value);
      p.autoMin = $('autoMin').checked;
      p.xBoost = $('xBoost').checked;
      p.showWire = $('showWire').checked;
      p.showRays = $('showRays').checked;
      p.showProfiles = $('showProfiles').checked;
      p.showAstigTexture = $('showAstigTexture').checked;
      p.resolution = Math.round(p.resolution / 2) * 2;
      p.axis = clamp(p.axis, 0, 180);
      return p;
    }

    function syncPair(key, source) {
      const num = $(key);
      const range = $(`${key}Range`);
      if (source === 'range') num.value = range.value;
      if (source === 'number') range.value = num.value;
    }

    function bindInputs() {
      for (const key of paired) {
        const num = $(key);
        const range = $(`${key}Range`);
        range.addEventListener('input', () => {
          syncPair(key, 'range');
          $('preset').value = 'custom';
          scheduleRebuild();
        });
        num.addEventListener('input', () => {
          const min = Number(num.min);
          const max = Number(num.max);
          if (Number.isFinite(min) && Number.isFinite(max)) {
            num.value = clamp(Number(num.value), min, max);
          }
          syncPair(key, 'number');
          $('preset').value = 'custom';
          scheduleRebuild();
        });
      }

      for (const id of ['autoMin', 'xBoost', 'showWire', 'showRays', 'showProfiles', 'showAstigTexture']) {
        $(id).addEventListener('change', rebuild);
      }

      $('preset').addEventListener('change', () => {
        applyPreset($('preset').value);
        scheduleRebuild();
      });

      $('resetView').addEventListener('click', () => {
        camera.position.set(4.8, -6.4, 3.2);
        controls.target.set(0, 0, 0);
        camera.lookAt(controls.target);
        controls.update();
      });

      $('copyLink').addEventListener('click', async () => {
        const p = getParams();
        const qs = new URLSearchParams({
          s: p.sphere,
          c: p.cylinder,
          a: p.axis,
          d: p.diameter,
          bt: p.baseThickness,
          mt: p.minThickness,
          n: p.refractiveIndex,
          xs: p.xScale,
          cg: p.curveGain,
          op: p.opacity,
          res: p.resolution,
          xb: p.xBoost ? 1 : 0,
          wire: p.showWire ? 1 : 0,
          rays: p.showRays ? 1 : 0,
          prof: p.showProfiles ? 1 : 0,
          astig: p.showAstigTexture ? 1 : 0
        });
        const url = `${location.origin}${location.pathname}?${qs.toString()}`;
        try {
          await navigator.clipboard.writeText(url);
          showToast('已复制当前参数链接');
        } catch {
          showToast('浏览器禁止复制，可手动复制地址栏参数');
          history.replaceState(null, '', `?${qs.toString()}`);
        }
      });
    }

    function applyPreset(value) {
      const presets = {
        myopia: { sphere: -3.00, cylinder: 0, axis: 180, curveGain: 1.6, xScale: 1 },
        hyperopia: { sphere: 3.00, cylinder: 0, axis: 180, curveGain: 1.6, xScale: 1 },
        astigMinus: { sphere: -2.00, cylinder: -1.50, axis: 180, curveGain: 2.0, xScale: 1.35 },
        astigPlus: { sphere: 2.00, cylinder: 1.50, axis: 90, curveGain: 2.0, xScale: 1.35 },
        mixed: { sphere: 1.00, cylinder: -3.00, axis: 45, curveGain: 2.2, xScale: 1.5 }
      };
      const preset = presets[value];
      if (!preset) return;
      for (const [key, val] of Object.entries(preset)) {
        $(key).value = String(val);
        $(`${key}Range`).value = String(val);
      }
    }

    function loadFromQuery() {
      const qs = new URLSearchParams(location.search);
      const map = {
        s: 'sphere',
        c: 'cylinder',
        a: 'axis',
        d: 'diameter',
        bt: 'baseThickness',
        mt: 'minThickness',
        n: 'refractiveIndex',
        xs: 'xScale',
        cg: 'curveGain',
        op: 'opacity',
        res: 'resolution'
      };
      for (const [shortKey, key] of Object.entries(map)) {
        if (!qs.has(shortKey)) continue;
        const val = Number(qs.get(shortKey));
        if (!Number.isFinite(val)) continue;
        $(key).value = String(val);
        $(`${key}Range`).value = String(val);
      }
      if (qs.has('xb')) $('xBoost').checked = qs.get('xb') !== '0';
      if (qs.has('wire')) $('showWire').checked = qs.get('wire') !== '0';
      if (qs.has('rays')) $('showRays').checked = qs.get('rays') !== '0';
      if (qs.has('prof')) $('showProfiles').checked = qs.get('prof') !== '0';
      if (qs.has('astig')) $('showAstigTexture').checked = qs.get('astig') !== '0';
    }

    function makeLensGeometry(params) {
      const rings = clamp(params.resolution, 24, 150);
      const sectors = Math.max(72, Math.round(rings * 2));
      const pointCount = (rings + 1) * sectors;
      const radiusScene = 2.2 * (params.diameter / 65);
      const baseScene = params.baseThickness * UNIT_PER_MM_AT_DEFAULT;
      const minScene = params.minThickness * UNIT_PER_MM_AT_DEFAULT;
      const diameterScale = params.diameter / 65;
      const xBoostGain = params.xBoost ? Math.sqrt(params.xScale) : 1;
      const powerIndexCorrection = 1.6 / params.refractiveIndex;
      const gain = 0.044 * params.curveGain * xBoostGain * diameterScale * diameterScale * powerIndexCorrection;
      const axisRad = params.axis * DEG;
      const sinA = Math.sin(axisRad);
      const cosA = Math.cos(axisRad);

      const samples = [];
      let minRaw = Infinity;
      let maxRaw = -Infinity;

      for (let i = 0; i <= rings; i++) {
        const r = i / rings;
        for (let j = 0; j < sectors; j++) {
          const theta = (j / sectors) * Math.PI * 2;
          const x = r * Math.cos(theta);
          const y = r * Math.sin(theta);
          const perp = -sinA * x + cosA * y;
          const r2 = x * x + y * y;
          const powerTerm = params.sphere * r2 + params.cylinder * perp * perp;
          const profile = -powerTerm;
          const rawThickness = baseScene + gain * profile;
          minRaw = Math.min(minRaw, rawThickness);
          maxRaw = Math.max(maxRaw, rawThickness);
          samples.push({ x, y, r, theta, thickness: rawThickness, powerTerm, perp });
        }
      }

      const shift = params.autoMin ? (minScene - minRaw) : Math.max(0, minScene - minRaw);
      const positions = new Float32Array(pointCount * 2 * 3);
      const colors = new Float32Array(pointCount * 2 * 3);
      let minT = Infinity;
      let maxT = -Infinity;
      let maxZ = 0;

      for (let i = 0; i < samples.length; i++) {
        const s = samples[i];
        const t = Math.max(minScene * 0.35, s.thickness + shift);
        minT = Math.min(minT, t);
        maxT = Math.max(maxT, t);
        maxZ = Math.max(maxZ, t / 2);

        const px = s.x * radiusScene * params.xScale;
        const py = s.y * radiusScene;
        const frontIndex = i * 3;
        const backIndex = (pointCount + i) * 3;

        positions[frontIndex] = px;
        positions[frontIndex + 1] = py;
        positions[frontIndex + 2] = t / 2;

        positions[backIndex] = px;
        positions[backIndex + 1] = py;
        positions[backIndex + 2] = -t / 2;
      }

      const diffT = Math.max(1e-6, maxT - minT);
      for (let i = 0; i < samples.length; i++) {
        const t = Math.max(minScene * 0.35, samples[i].thickness + shift);
        const k = clamp((t - minT) / diffT, 0, 1);
        const color = new THREE.Color();
        color.setHSL(0.56 - 0.12 * k, 0.84, 0.64 - 0.12 * k);
        const frontIndex = i * 3;
        const backIndex = (pointCount + i) * 3;
        colors[frontIndex] = color.r;
        colors[frontIndex + 1] = color.g;
        colors[frontIndex + 2] = color.b;
        colors[backIndex] = color.r;
        colors[backIndex + 1] = color.g;
        colors[backIndex + 2] = color.b;
      }

      const indices = [];
      const idx = (i, j) => i * sectors + ((j % sectors + sectors) % sectors);

      for (let i = 0; i < rings; i++) {
        for (let j = 0; j < sectors; j++) {
          const a = idx(i, j);
          const b = idx(i + 1, j);
          const c = idx(i + 1, j + 1);
          const d = idx(i, j + 1);

          indices.push(a, b, c, a, c, d);

          const ab = pointCount + a;
          const bb = pointCount + b;
          const cb = pointCount + c;
          const db = pointCount + d;
          indices.push(ab, cb, bb, ab, db, cb);
        }
      }

      for (let j = 0; j < sectors; j++) {
        const f1 = idx(rings, j);
        const f2 = idx(rings, j + 1);
        const b1 = pointCount + f1;
        const b2 = pointCount + f2;
        indices.push(f1, f2, b2, f1, b2, b1);
      }

      const geometry = new THREE.BufferGeometry();
      geometry.setAttribute('position', new THREE.BufferAttribute(positions, 3));
      geometry.setAttribute('color', new THREE.BufferAttribute(colors, 3));
      geometry.setIndex(indices);
      geometry.computeVertexNormals();

      return {
        geometry,
        rings,
        sectors,
        radiusScene,
        minT,
        maxT,
        maxZ,
        samples,
        pointCount,
        axisRad,
        shift,
        gain,
        baseScene,
        minScene,
        sinA,
        cosA
      };
    }

    function lensThicknessAtUnit(params, lensData, x, y) {
      const r2 = x * x + y * y;
      const perp = -lensData.sinA * x + lensData.cosA * y;
      return Math.max(
        lensData.minScene * 0.35,
        lensData.baseScene + lensData.gain * (-(params.sphere * r2 + params.cylinder * perp * perp)) + lensData.shift
      );
    }

    function makeRimLines(params, lensData) {
      const group = new THREE.Group();
      const pos = lensData.geometry.getAttribute('position');
      const front = [];
      const back = [];
      const outerStart = lensData.rings * lensData.sectors;
      for (let j = 0; j <= lensData.sectors; j++) {
        const i = outerStart + (j % lensData.sectors);
        front.push(new THREE.Vector3(pos.getX(i), pos.getY(i), pos.getZ(i) + 0.012));
        const bi = lensData.pointCount + i;
        back.push(new THREE.Vector3(pos.getX(bi), pos.getY(bi), pos.getZ(bi) - 0.012));
      }
      const rimMat = new THREE.LineBasicMaterial({ color: 0xe0f2fe, transparent: true, opacity: 0.72 });
      const sideMat = new THREE.LineBasicMaterial({ color: 0x93c5fd, transparent: true, opacity: 0.28 });
      group.add(new THREE.Line(new THREE.BufferGeometry().setFromPoints(front), rimMat));
      group.add(new THREE.Line(new THREE.BufferGeometry().setFromPoints(back), rimMat));
      const side = [];
      const stride = Math.max(6, Math.round(lensData.sectors / 24));
      for (let j = 0; j < lensData.sectors; j += stride) {
        const i = outerStart + j;
        const bi = lensData.pointCount + i;
        side.push(new THREE.Vector3(pos.getX(i), pos.getY(i), pos.getZ(i)));
        side.push(new THREE.Vector3(pos.getX(bi), pos.getY(bi), pos.getZ(bi)));
      }
      const sideGeom = new THREE.BufferGeometry().setFromPoints(side);
      group.add(new THREE.LineSegments(sideGeom, sideMat));
      return group;
    }

    function makeAxisLines(params, lensData) {
      const group = new THREE.Group();
      const r = lensData.radiusScene * 1.05;
      const z = lensData.maxZ + 0.035;
      const axis = params.axis * DEG;
      const axisPts = [
        new THREE.Vector3(-Math.cos(axis) * r * params.xScale, -Math.sin(axis) * r, z),
        new THREE.Vector3(Math.cos(axis) * r * params.xScale, Math.sin(axis) * r, z)
      ];
      const perp = axis + Math.PI / 2;
      const perpPts = [
        new THREE.Vector3(-Math.cos(perp) * r * params.xScale, -Math.sin(perp) * r, z + 0.012),
        new THREE.Vector3(Math.cos(perp) * r * params.xScale, Math.sin(perp) * r, z + 0.012)
      ];
      const axisMat = new THREE.LineBasicMaterial({ color: 0xfb7185, transparent: true, opacity: 0.95 });
      const perpMat = new THREE.LineBasicMaterial({ color: 0xfbbf24, transparent: true, opacity: 0.90 });
      group.add(new THREE.Line(new THREE.BufferGeometry().setFromPoints(axisPts), axisMat));
      group.add(new THREE.Line(new THREE.BufferGeometry().setFromPoints(perpPts), perpMat));
      return group;
    }

    function makeProfiles(params, lensData) {
      const group = new THREE.Group();
      const matXFront = new THREE.LineBasicMaterial({ color: 0x93c5fd, transparent: true, opacity: 0.95 });
      const matXBack = new THREE.LineBasicMaterial({ color: 0x60a5fa, transparent: true, opacity: 0.55 });
      const matYFront = new THREE.LineBasicMaterial({ color: 0xc4b5fd, transparent: true, opacity: 0.95 });
      const matYBack = new THREE.LineBasicMaterial({ color: 0xa78bfa, transparent: true, opacity: 0.55 });
      const radiusScene = lensData.radiusScene;

      function addLine(axisName, front, mat) {
        const pts = [];
        const steps = 120;
        for (let i = 0; i <= steps; i++) {
          const u = -1 + (2 * i) / steps;
          const x = axisName === 'x' ? u : 0;
          const y = axisName === 'y' ? u : 0;
          const t = lensThicknessAtUnit(params, lensData, x, y);
          pts.push(new THREE.Vector3(x * radiusScene * params.xScale, y * radiusScene, front ? t / 2 + 0.018 : -t / 2 - 0.018));
        }
        group.add(new THREE.Line(new THREE.BufferGeometry().setFromPoints(pts), mat));
      }

      addLine('x', true, matXFront);
      addLine('x', false, matXBack);
      addLine('y', true, matYFront);
      addLine('y', false, matYBack);
      return group;
    }

    function makeAstigTexture(params, lensData) {
      const group = new THREE.Group();
      if (Math.abs(params.cylinder) < 0.125) return group;
      const radiusScene = lensData.radiusScene;
      const axis = params.axis * DEG;
      const cosA = Math.cos(axis);
      const sinA = Math.sin(axis);
      const mat = new THREE.LineBasicMaterial({
        color: params.cylinder < 0 ? 0xf472b6 : 0x2dd4bf,
        transparent: true,
        opacity: 0.48
      });
      for (let k = -4; k <= 4; k++) {
        const u = k / 5;
        const half = Math.sqrt(Math.max(0, 1 - u * u));
        const pts = [];
        const steps = 80;
        for (let i = 0; i <= steps; i++) {
          const v = -half + (2 * half * i) / steps;
          const x = cosA * v - sinA * u;
          const y = sinA * v + cosA * u;
          const t = lensThicknessAtUnit(params, lensData, x, y);
          pts.push(new THREE.Vector3(x * radiusScene * params.xScale, y * radiusScene, t / 2 + 0.028));
        }
        group.add(new THREE.Line(new THREE.BufferGeometry().setFromPoints(pts), mat));
      }
      return group;
    }

    function makeRays(params, lensData) {
      const group = new THREE.Group();
      const incoming = [];
      const outgoing = [];
      const axisRad = params.axis * DEG;
      const sinA = Math.sin(axisRad);
      const cosA = Math.cos(axisRad);
      const rScene = lensData.radiusScene;
      const zIn = -4.8;
      const zBefore = -lensData.maxZ - 0.28;
      const zAfter = lensData.maxZ + 0.28;
      const zOut = 5.2;
      const samples = [-0.72, -0.36, 0, 0.36, 0.72];

      for (const ux of samples) {
        for (const uy of samples) {
          if (ux * ux + uy * uy > 0.84 * 0.84) continue;
          if (Math.abs(ux) < 0.001 && Math.abs(uy) < 0.001) continue;
          const x = ux * rScene * params.xScale;
          const y = uy * rScene;
          incoming.push(x, y, zIn, x, y, zBefore);

          const r2 = ux * ux + uy * uy;
          const perp = -sinA * ux + cosA * uy;
          const meridianMix = r2 < 1e-6 ? 0 : (perp * perp) / r2;
          const pEff = params.sphere + params.cylinder * meridianMix;
          let ex = x;
          let ey = y;

          if (Math.abs(pEff) > 0.12) {
            const focus = clamp(14 / Math.abs(pEff), 2.2, 16);