OneBot: Leantime 改造版源码（BOM/Univer 表格/AI 接管/品牌替换等）

dev/STEPViewer/.htaccess

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+# WebAssembly 必须带正确的 MIME，否则 occt 引擎的 instantiateStreaming 会失败
+AddType application/wasm .wasm
+AddType text/javascript .js .mjs
+
+# 禁止直接下载模型文件（.stp/.step/.enc 只能通过查看器令牌通道读取）
+<FilesMatch "\.(stp|step|enc|STP|STEP)$">
+  Require all denied
+</FilesMatch>

dev/STEPViewer/api/.htaccess

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+# 禁止直接访问加密模型文件（双保险：PHP 接口已校验令牌）
+<FilesMatch "\.(stp|step|enc)$">
+  Require all denied
+</FilesMatch>

dev/STEPViewer/api/model.php

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+<?php
+/**
+ * STEP 查看器 - 模型读取接口（PHP 版）
+ * 校验令牌 → .enc 解密 / .stp 原样 → 流式返回
+ */
+$SECRET = '7175a8598ff7fa1c182f57f0c750e4f8';
+// 与 upload.php 保持一致的私有目录配置：模型放 Web 目录外，web 里根本没有文件可下载
+$PRIVATE_DIR = '/volume1/stepviewer_private';
+
+function json_out($code, $obj) {
+    http_response_code($code);
+    header('Content-Type: application/json; charset=utf-8');
+    echo json_encode($obj, JSON_UNESCAPED_UNICODE);
+    exit;
+}
+
+$f = $_GET['f'] ?? '';
+$t = $_GET['t'] ?? '';
+$e = (int)($_GET['e'] ?? 0);
+if (!$f || !$t || !preg_match('/\.(stp|step|enc)$/i', $f)) json_out(400, ['error' => 'bad params']);
+
+$sig = substr(hash_hmac('sha256', $f . '|' . $e, $SECRET), 0, 16);
+if (!hash_equals($sig, $t) || time() > $e) json_out(403, ['error' => 'invalid or expired token']);
+
+$root = realpath(__DIR__ . '/..');
+if ($PRIVATE_DIR !== '') {
+    // 私有目录优先（嵌入链接写纯文件名即可）；目录不存在时退回站内路径，
+    // 让留在 web 目录里的样例模型按原路径继续可用（这些文件本来就允许直链，
+    // 退回不新增暴露面）。要保护的文件必须移出 web 目录放进私有目录。
+    $full = realpath($PRIVATE_DIR . '/' . basename($f));
+    $ok = $full && strpos($full, realpath($PRIVATE_DIR)) === 0 && is_file($full);
+    if (!$ok) {
+        $full = realpath($root . '/' . $f);
+        $ok = $full && strpos($full, $root) === 0 && is_file($full);
+    }
+} else {
+    $full = realpath($root . '/' . $f);
+    $ok = $full && strpos($full, $root) === 0 && is_file($full);
+}
+if (!$ok || !$full) json_out(404, ['error' => 'not found']);
+
+$data = file_get_contents($full);
+if (preg_match('/\.enc$/i', $f)) {
+    $nonce = substr($data, 0, 16);
+    $key = hash('sha256', $SECRET . $nonce, true);
+    $body = substr($data, 16);
+    $out = '';
+    for ($i = 0; $i < strlen($body); $i++) {
+        $out .= $body[$i] ^ $key[$i % strlen($key)];
+    }
+    $data = $out;
+}
+
+// 传输层 gzip：新格式文件解密后即以 gzip 魔数开头，原样传输；
+// 旧格式明文文件在线压缩。浏览器 fetch 自动解压（无需前端改动）
+$send = $data;
+if (substr($send, 0, 2) === "\x1f\x8b") {
+    header('Content-Encoding: gzip');
+} elseif (!ini_get('zlib.output_compression') && strlen($data) > 1024) {
+    $gz = gzencode($data, 6);
+    if ($gz !== false) { $send = $gz; header('Content-Encoding: gzip'); }
+}
+header('Content-Type: application/octet-stream');
+header('Content-Length: ' . strlen($send));
+header('Cache-Control: no-store');
+echo $send;

dev/STEPViewer/api/token.php

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+<?php
+/**
+ * STEP 查看器 - 令牌接口（PHP 版）
+ * 同源校验 + HMAC 短时令牌（5 分钟）
+ */
+header('Content-Type: application/json; charset=utf-8');
+
+$SECRET = '7175a8598ff7fa1c182f57f0c750e4f8';
+$TTL = 300;
+
+function json_out($code, $obj) {
+    http_response_code($code);
+    echo json_encode($obj, JSON_UNESCAPED_UNICODE);
+    exit;
+}
+
+$f = $_GET['f'] ?? '';
+if (!$f || !preg_match('/\.(stp|step|enc)$/i', $f)) json_out(400, ['error' => 'bad file']);
+
+// 只允许本站页面来取令牌，挡掉直接爬取。
+// 优先看 Sec-Fetch-Site：由查看器页面发起的同源 fetch 恒为 same-origin（跨站 iframe
+// 嵌入也不受影响，且不会被父站点的 Referrer-Policy 剥掉）；没有该头的旧浏览器
+// 退回「Referer 含本站 host」的校验。直链/curl 两种都过不了。
+$fetchSite = $_SERVER['HTTP_SEC_FETCH_SITE'] ?? '';
+$referer = $_SERVER['HTTP_REFERER'] ?? '';
+$host = $_SERVER['HTTP_HOST'] ?? '';
+if ($fetchSite !== '') {
+    if ($fetchSite !== 'same-origin' && $fetchSite !== 'same-site') json_out(403, ['error' => 'forbidden']);
+} elseif (strpos($referer, $host) === false) {
+    json_out(403, ['error' => 'forbidden']);
+}
+
+$exp = time() + $TTL;
+$sig = substr(hash_hmac('sha256', $f . '|' . $exp, $SECRET), 0, 16);
+json_out(200, ['token' => $sig, 'expires' => $exp]);

dev/STEPViewer/api/upload.php

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+<?php
+/**
+ * STEP 查看器 - 上传接口（PHP 版，虚拟主机可用）
+ * 接收原始字节流 + X-Filename 头，加密存储为 uploads/xxx.enc
+ * 生产环境请修改 SECRET！
+ */
+header('Content-Type: application/json; charset=utf-8');
+
+$SECRET = '7175a8598ff7fa1c182f57f0c750e4f8';
+$MAX_SIZE = 500 * 1024 * 1024;
+// 私有目录：Web 目录外的绝对路径，模型只存这里，web 目录里根本没有模型文件可下载。
+// 群晖 File Station 在 web 目录外建 /volume1/stepviewer_private 并给 http 用户组读写权限；
+// 路径不同就改成你的实际路径。
+$PRIVATE_DIR = '/volume1/stepviewer_private';
+
+function json_out($code, $obj) {
+    http_response_code($code);
+    echo json_encode($obj, JSON_UNESCAPED_UNICODE);
+    exit;
+}
+
+if ($_SERVER['REQUEST_METHOD'] !== 'POST') json_out(405, ['error' => 'method not allowed']);
+
+$len = (int)($_SERVER['CONTENT_LENGTH'] ?? 0);
+if ($len <= 0) json_out(400, ['error' => 'empty body']);
+if ($len > $MAX_SIZE) json_out(413, ['error' => 'file too large (max 500MB)']);
+
+$raw = urldecode($_SERVER['HTTP_X_FILENAME'] ?? 'model.step');
+$base = basename($raw);
+$safe = preg_replace('/[^\w.\-\x{4e00}-\x{9fff}]/u', '_', $base);
+if (!$safe || !preg_match('/\.(step|stp)$/i', $safe)) $safe .= '.stp';
+$stem = pathinfo($safe, PATHINFO_FILENAME);
+$ext = pathinfo($safe, PATHINFO_EXTENSION);
+$name = $stem . '_' . substr(bin2hex(random_bytes(4)), 0, 8) . '.' . $ext;
+
+$data = file_get_contents('php://input');
+if ($data === false || strlen($data) !== $len) json_out(400, ['error' => 'incomplete upload']);
+
+// 客户端可选 gzip 压缩上传（STEP 文本约可压到 1/6，节省带宽）
+if (($_SERVER['HTTP_X_ENCODING'] ?? '') === 'gzip') {
+    $dec = gzdecode($data);
+    if ($dec === false) json_out(400, ['error' => 'bad gzip body']);
+    if (strlen($dec) > $MAX_SIZE) json_out(413, ['error' => 'file too large (max 500MB)']);
+    $data = $dec;
+}
+
+// 存储层也压缩：先 gzip 再加密，磁盘占用约 1/6（读取端靠 gzip 魔数自动识别）
+$rawSize = strlen($data);
+$data = gzencode($data, 6);
+if ($data === false) json_out(500, ['error' => 'gzip failed']);
+
+$dir = $PRIVATE_DIR !== '' ? $PRIVATE_DIR : (__DIR__ . '/../uploads');
+if (!is_dir($dir)) @mkdir($dir, 0755, true);
+if (!is_dir($dir)) json_out(500, ['error' => 'upload dir not writable']);
+
+$nonce = random_bytes(16);
+$key = hash('sha256', $SECRET . $nonce, true);
+$enc = '';
+for ($i = 0; $i < strlen($data); $i++) {
+    $enc .= $data[$i] ^ $key[$i % strlen($key)];
+}
+
+file_put_contents($dir . '/' . $name . '.enc', $nonce . $enc);
+// 私有目录模式下返回裸文件名：嵌入链接就是 ?file=xxx.enc，读取端按 basename 在私有目录找
+$entryPath = ($PRIVATE_DIR !== '' ? '' : 'uploads/') . $name . '.enc';
+
+// 记入首页数模库（入口目录的 library.json，2D/3D 共享）；库写失败不影响上传本身
+try {
+    add_to_library($entryPath, $safe, '3d');
+} catch (Throwable $e) { /* 忽略 */ }
+
+json_out(200, ['path' => $entryPath, 'size' => $rawSize]);
+
+/**
+ * 把刚上传的文件追加进首页数模库（../../library.json）：
+ * 同路径已有记录就刷新名称和时间，否则插到最前。
+ */
+function add_to_library($path, $name, $type) {
+    $libFile = dirname(__DIR__, 2) . '/library.json';
+    $records = [];
+    if (is_file($libFile)) {
+        $old = json_decode((string)file_get_contents($libFile), true);
+        if (is_array($old) && isset($old['records']) && is_array($old['records'])) $records = $old['records'];
+    }
+    $found = false;
+    foreach ($records as $i => $rec) {
+        if (isset($rec['path']) && $rec['path'] === $path) {
+            $records[$i]['name'] = $name;
+            $records[$i]['time'] = time();
+            $found = true;
+            break;
+        }
+    }
+    if (!$found) {
+        array_unshift($records, ['path' => $path, 'name' => $name, 'type' => $type, 'note' => '', 'time' => time()]);
+    }
+    @file_put_contents($libFile, json_encode(['records' => $records], JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES), LOCK_EX);
+}

dev/STEPViewer/embed_demo.html

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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>STEP 查看器嵌入示例</title>
+  <style>
+    body { margin: 0; font-family: "Microsoft YaHei", sans-serif; background: #f5f6f7; }
+    .header {
+      background: #fff; padding: 14px 24px; border-bottom: 1px solid #e3e6e8;
+      display: flex; align-items: center; gap: 16px; flex-wrap: wrap;
+    }
+    .header h1 { font-size: 18px; margin: 0; color: #2b9ae8; }
+    .model-btn {
+      border: 1px solid #ddd; background: #fff; border-radius: 4px;
+      padding: 8px 16px; cursor: pointer; font-size: 13px; color: #444;
+    }
+    .model-btn:hover { border-color: #2b9ae8; color: #2b9ae8; }
+    .content { padding: 16px; }
+    .frame-box {
+      background: #fff; border: 1px solid #e3e6e8; border-radius: 6px;
+      overflow: hidden; height: calc(100vh - 150px);
+    }
+    iframe { width: 100%; height: 100%; border: none; display: block; }
+    .tip { color: #888; font-size: 12px; margin-top: 8px; line-height: 1.8; }
+  </style>
+</head>
+<body>
+  <div class="header">
+    <h1>STEP 3D 查看器 · 嵌入示例</h1>
+    <button class="model-btn" data-model="samples/user/LZ01001001_H100_2mm.stp">LZ01001001_H100</button>
+    <button class="model-btn" data-model="samples/user/LZ01001005_H500_2mm.stp">LZ01001005_H500</button>
+    <button class="model-btn" data-model="samples/as1-oc-214.stp">as1 装配体</button>
+  </div>
+  <div class="content">
+    <div class="frame-box">
+      <!-- 嵌入方式：iframe + ?file= 参数自动加载指定模型 -->
+      <iframe id="viewerFrame" src="./index.html?file=samples/user/LZ01001001_H100_2mm.stp" allowFullScreen></iframe>
+    </div>
+    <div class="tip">
+      嵌入方法：&lt;iframe src="查看器目录/index.html?file=模型路径.stp" width="100%" height="600" allowFullScreen&gt;&lt;/iframe&gt;<br>
+      部署：把整个 STEPViewer 目录（index.html、app.js、style.css、libs、icons）上传到你的网站，iframe 指向它即可。<br>
+      注意：模型文件要与查看器同源（同一域名下），或用 ?url= 加载远程模型（远程服务器需允许 CORS）。
+    </div>
+  </div>
+  <script>
+    document.querySelectorAll('.model-btn').forEach((b) => {
+      b.addEventListener('click', () => {
+        document.getElementById('viewerFrame').src = './index.html?file=' + encodeURIComponent(b.dataset.model);
+      });
+    });
+  </script>
+</body>
+</html>

dev/STEPViewer/index.html

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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>STEP 模型查看器</title>
+  <link rel="icon" href="favicon.ico">
+  <link rel="stylesheet" href="./style.css?v=5">
+  <script type="importmap">
+    {
+      "imports": {
+        "three": "./libs/three.module.min.js",
+        "three/addons/": "./libs/"
+      }
+    }
+  </script>
+  <script src="./libs/occt-import-js.js"></script>
+</head>
+<body>
+  <!-- 顶栏 -->
+  <div id="topbar">
+    <div class="logo">
+      <span class="logo-text">STEP 3D 查看器</span>
+    </div>
+    <button id="btnOpen" class="btn-primary" title="打开 STEP 文件">打开模型</button>
+    <label class="quality-label" title="网格细分精度（越高越精细，转换时间越长）">精度
+      <select id="qualitySelect">
+        <option value="low">低</option>
+        <option value="medium">中</option>
+        <option value="high" selected>高</option>
+      </select>
+    </label>
+    <button id="btnEmbed" class="btn-secondary" title="生成嵌入链接">嵌入</button>
+    <span id="fileName" class="file-name">未加载模型（支持拖拽 .step/.stp 文件到页面）</span>
+    <div class="top-right">
+      <button id="btnFullscreen" class="icon-btn" title="全屏"><img src="./icons/all-screen.png" alt="全屏"></button>
+    </div>
+  </div>
+
+  <div id="main">
+    <!-- 左侧模型树 -->
+    <div id="treePanel">
+      <div class="tree-header">
+        <span class="tree-title">模型树</span>
+        <button id="btnTreeClose" class="tree-close" title="关闭面板">✕</button>
+        <div class="tree-search">
+          <img src="./icons/ico-search.33e9e6a1.png" alt="搜索">
+          <input id="treeSearch" type="text" placeholder="搜索零件...">
+        </div>
+      </div>
+      <div id="tree" class="tree-body"><div class="tree-empty">加载模型后显示零件树</div></div>
+    </div>
+
+    <!-- 视口 -->
+    <div id="viewport">
+      <div id="canvasWrap"></div>
+
+      <!-- 底部工具栏 -->
+      <div id="toolbar">
+        <button class="tool-btn active" data-tool="select" title="选择"><img src="./icons/view-tool-select.png" alt="选择"><span>选择</span></button>
+        <button class="tool-btn" data-tool="measure" title="测量"><img src="./icons/view-tool-distance.png" alt="测量"><span>测量</span></button>
+        <button class="tool-btn" data-tool="drag" title="拖动零件"><img src="./icons/view-tool-drag.png" alt="拖动"><span>拖动</span></button>
+        <button class="tool-btn" data-tool="singalDrag" title="单件拖动"><img src="./icons/view-tool-singalDrag.png" alt="单件拖动"><span>单件</span></button>
+        <button class="tool-btn" data-tool="explode" title="爆炸"><img src="./icons/view-tool-blast.png" alt="爆炸"><span>爆炸</span></button>
+        <button class="tool-btn" data-tool="section" title="剖切"><img src="./icons/view-tool-slice.png" alt="剖切"><span>剖切</span></button>
+        <div class="tool-sep"></div>
+        <button class="tool-btn" id="btnTree" title="结构树显示/隐藏"><img src="./icons/view-tool-tree.png" alt="结构树"><span>结构树</span></button>
+        <button class="tool-btn" id="btnWireframe" title="线框（显示/隐藏轮廓线）"><img src="./icons/ico-set-wireframe.png" alt="线框"><span>线框</span></button>
+        <button class="tool-btn" id="btnColorPanel" title="上色"><img src="./icons/ico-set-color.png" alt="上色"><span>上色</span></button>
+        <button class="tool-btn" id="btnShowAll" title="全部显示"><img src="./icons/view-tool-hideShow.png" alt="全部显示"><span>显示</span></button>
+        <button class="tool-btn" id="btnTransparent" title="透明（选中零件）"><img src="./icons/view-tool-transparent.png" alt="透明"><span>透明</span></button>
+        <button class="tool-btn" id="btnBbox" title="包围盒"><img src="./icons/view-tool-coutBox.png" alt="包围盒"><span>包围盒</span></button>
+        <button class="tool-btn" id="btnClear" title="清除测量"><img src="./icons/view-tool-clear.png" alt="清除"><span>清除</span></button>
+        <button class="tool-btn" id="btnSingleReset" title="单件复位"><img src="./icons/view-tool-singalReset.png" alt="单件复位"><span>复位</span></button>
+        <button class="tool-btn" id="btnAllReset" title="全部复位"><img src="./icons/view-tool-allReset.png" alt="全部复位"><span>全复位</span></button>
+        <div class="tool-sep"></div>
+        <button class="tool-btn" id="btnVport" title="切换视角"><img src="./icons/view-tool-vport.png" alt="视角"><span>视角</span></button>
+        <button class="tool-btn" id="btnAxes" title="坐标系"><img src="./icons/view-tool-coordinate.png" alt="坐标系"><span>坐标</span></button>
+        <button class="tool-btn" id="btnFull" title="全屏"><img src="./icons/all-screen.png" alt="全屏"><span>全屏</span></button>
+      </div>
+
+      <!-- 爆炸面板 -->
+      <div id="explodePanel" class="float-panel hidden">
+        <div class="panel-title">爆炸 <img src="./icons/close.0fb8dc6e.png" class="panel-close" data-panel="explode" alt="关闭"></div>
+        <div class="panel-row">
+          <span>程度</span>
+          <input type="range" id="explodeSlider" min="0" max="100" value="0">
+          <span id="explodeVal" class="panel-val">0%</span>
+        </div>
+      </div>
+
+      <!-- 剖切面板 -->
+      <div id="sectionPanel" class="float-panel hidden">
+        <div class="panel-title">剖切 <img src="./icons/close.0fb8dc6e.png" class="panel-close" data-panel="section" alt="关闭"></div>
+        <div class="panel-row">
+          <button class="axis-btn" data-axis="x">X</button>
+          <button class="axis-btn" data-axis="y">Y</button>
+          <button class="axis-btn active" data-axis="z">Z</button>
+          <button id="btnSectionFlip" class="small-btn">翻转</button>
+          <button id="btnSectionToggle" class="small-btn on">开启</button>
+        </div>
+        <div class="panel-row">
+          <span>位置</span>
+          <input type="range" id="sectionSlider" min="-100" max="100" value="0">
+          <span id="sectionVal" class="panel-val">0</span>
+        </div>
+      </div>
+
+      <!-- 测量子面板（水平单行，激活时隐藏底部工具栏） -->
+      <div id="measurePanel" class="float-panel measure-panel hidden">
+        <div id="measureModes"></div>
+        <div class="measure-actions">
+          <button id="btnStats" class="measure-act" title="结果统计"><img src="./icons/view-tool-statisticalResult.png" alt="统计"></button>
+          <button id="btnMeasureClear" class="measure-act" title="清空"><img src="./icons/view-tool-clear.png" alt="清空"></button>
+        </div>
+        <button id="btnMeasureClose" class="measure-act" title="关闭测量，恢复工具栏"><img src="./icons/close.0fb8dc6e.png" alt="关闭"></button>
+      </div>
+
+      <!-- 结果统计面板 -->
+      <div id="statsPanel" class="float-panel hidden">
+        <div class="panel-title">结果统计 <img src="./icons/close.0fb8dc6e.png" class="panel-close" data-panel="stats" alt="关闭"></div>
+        <div id="statsList"><div class="stats-empty">暂无测量结果</div></div>
+      </div>
+
+      <!-- 上色面板 -->
+      <div id="colorPanel" class="float-panel hidden">
+        <div class="panel-title">上色 <img src="./icons/close.0fb8dc6e.png" class="panel-close" data-panel="color" alt="关闭"></div>
+        <div class="panel-row">
+          <input type="color" id="colorPicker" value="#2b9ae8" title="选择颜色">
+          <button id="btnColorApply" class="small-btn">应用到选中</button>
+        </div>
+        <div class="panel-row">
+          <button id="btnColorOneClick" class="small-btn" title="按零件自动分配颜色"><img src="./icons/one-click-color.0a5c28c0.png" alt="一键上色">一键上色</button>
+          <button id="btnColorReset" class="small-btn">恢复原色</button>
+        </div>
+        <div class="panel-row">
+          <span>亮度</span>
+          <input type="range" id="brightnessSlider" min="50" max="200" value="100">
+          <span id="brightnessVal" class="panel-val">100%</span>
+        </div>
+      </div>
+
+      <!-- 嵌入链接面板 -->
+      <div id="embedPanel" class="float-panel hidden">
+        <div class="panel-title">生成嵌入链接 <img src="./icons/close.0fb8dc6e.png" class="panel-close" data-panel="embed" alt="关闭"></div>
+        <div class="panel-row">
+          <span>模型路径</span>
+          <input type="text" id="embedPath" placeholder="samples/xxx.stp 或 https://...">
+        </div>
+        <div class="panel-row">
+          <span>嵌入地址</span>
+          <input type="text" id="embedUrl" readonly>
+        </div>
+        <div class="panel-row">
+          <span>iframe 代码</span>
+          <textarea id="embedCode" rows="3" readonly></textarea>
+        </div>
+        <div class="panel-row embed-actions">
+          <button id="btnUploadModel" class="small-btn">上传当前模型</button>
+          <button id="btnCopyUrl" class="small-btn">复制链接</button>
+          <button id="btnCopyCode" class="small-btn">复制代码</button>
+        </div>
+        <div id="embedHint" class="embed-hint"></div>
+      </div>
+
+      <!-- 状态栏 -->
+      <div id="statusbar">
+        <span id="statusText">就绪 | 左键旋转 · 右键平移 · 滚轮缩放</span>
+        <span id="modelInfo" class="status-right"></span>
+      </div>
+    </div>
+  </div>
+
+  <!-- 零件右键菜单 -->
+  <div id="ctxMenu" class="hidden">
+    <div class="ctx-title" id="ctxMenuTitle"></div>
+    <div class="ctx-item" data-act="hide"><img src="./icons/view-tool-hideShow.png" alt=""><span>隐藏</span></div>
+    <div class="ctx-item" data-act="isolate"><img src="./icons/view-tool-conceal.png" alt=""><span>显示其他</span></div>
+    <div class="ctx-item" data-act="showAll"><img src="./icons/view-tool-hideShow.png" alt=""><span>全部显示</span></div>
+    <div class="ctx-sep"></div>
+    <div class="ctx-item" data-act="color"><img src="./icons/ico-set-color.png" alt=""><span>更改颜色</span></div>
+    <div class="ctx-item" data-act="transparent"><img src="./icons/view-tool-transparent.png" alt=""><span>透明</span></div>
+    <div class="ctx-sep"></div>
+    <div class="ctx-item" data-act="drag"><img src="./icons/view-tool-drag.png" alt=""><span>拖动</span></div>
+    <div class="ctx-item" data-act="reset"><img src="./icons/view-tool-singalReset.png" alt=""><span>复位</span></div>
+  </div>
+
+  <input type="file" id="fileInput" accept=".step,.stp,.STEP,.STP" style="display:none">
+
+  <!-- 加载遮罩（新迪同款弹跳圆点） -->
+  <div id="loading" class="hidden">
+    <div class="waiter"><div class="bounce1"></div><div class="bounce2"></div><div class="bounce3"></div></div>
+    <div id="loadingText">正在转换 STEP 模型...</div>
+  </div>
+
+  <!-- 拖拽提示 -->
+  <div id="dropOverlay" class="hidden"><div class="drop-box">松开鼠标加载 STEP 文件</div></div>
+
+  <script type="module" src="./app.js?v=5"></script>
+</body>
+</html>

dev/STEPViewer/libs/CSS2DRenderer.js

@@ -0,0 +1,215 @@
+import {
+	Matrix4,
+	Object3D,
+	Vector2,
+	Vector3
+} from 'three';
+
+class CSS2DObject extends Object3D {
+
+	constructor( element = document.createElement( 'div' ) ) {
+
+		super();
+
+		this.isCSS2DObject = true;
+
+		this.element = element;
+
+		this.element.style.position = 'absolute';
+		this.element.style.userSelect = 'none';
+
+		this.element.setAttribute( 'draggable', false );
+
+		this.center = new Vector2( 0.5, 0.5 ); // ( 0, 0 ) is the lower left; ( 1, 1 ) is the top right
+
+		this.addEventListener( 'removed', function () {
+
+			this.traverse( function ( object ) {
+
+				if ( object.element instanceof Element && object.element.parentNode !== null ) {
+
+					object.element.parentNode.removeChild( object.element );
+
+				}
+
+			} );
+
+		} );
+
+	}
+
+	copy( source, recursive ) {
+
+		super.copy( source, recursive );
+
+		this.element = source.element.cloneNode( true );
+
+		this.center = source.center;
+
+		return this;
+
+	}
+
+}
+
+//
+
+const _vector = new Vector3();
+const _viewMatrix = new Matrix4();
+const _viewProjectionMatrix = new Matrix4();
+const _a = new Vector3();
+const _b = new Vector3();
+
+class CSS2DRenderer {
+
+	constructor( parameters = {} ) {
+
+		const _this = this;
+
+		let _width, _height;
+		let _widthHalf, _heightHalf;
+
+		const cache = {
+			objects: new WeakMap()
+		};
+
+		const domElement = parameters.element !== undefined ? parameters.element : document.createElement( 'div' );
+
+		domElement.style.overflow = 'hidden';
+
+		this.domElement = domElement;
+
+		this.getSize = function () {
+
+			return {
+				width: _width,
+				height: _height
+			};
+
+		};
+
+		this.render = function ( scene, camera ) {
+
+			if ( scene.matrixWorldAutoUpdate === true ) scene.updateMatrixWorld();
+			if ( camera.parent === null && camera.matrixWorldAutoUpdate === true ) camera.updateMatrixWorld();
+
+			_viewMatrix.copy( camera.matrixWorldInverse );
+			_viewProjectionMatrix.multiplyMatrices( camera.projectionMatrix, _viewMatrix );
+
+			renderObject( scene, scene, camera );
+			zOrder( scene );
+
+		};
+
+		this.setSize = function ( width, height ) {
+
+			_width = width;
+			_height = height;
+
+			_widthHalf = _width / 2;
+			_heightHalf = _height / 2;
+
+			domElement.style.width = width + 'px';
+			domElement.style.height = height + 'px';
+
+		};
+
+		function renderObject( object, scene, camera ) {
+
+			if ( object.isCSS2DObject ) {
+
+				_vector.setFromMatrixPosition( object.matrixWorld );
+				_vector.applyMatrix4( _viewProjectionMatrix );
+
+				const visible = ( object.visible === true ) && ( _vector.z >= - 1 && _vector.z <= 1 ) && ( object.layers.test( camera.layers ) === true );
+				object.element.style.display = ( visible === true ) ? '' : 'none';
+
+				if ( visible === true ) {
+
+					object.onBeforeRender( _this, scene, camera );
+
+					const element = object.element;
+
+					element.style.transform = 'translate(' + ( - 100 * object.center.x ) + '%,' + ( - 100 * object.center.y ) + '%)' + 'translate(' + ( _vector.x * _widthHalf + _widthHalf ) + 'px,' + ( - _vector.y * _heightHalf + _heightHalf ) + 'px)';
+
+					if ( element.parentNode !== domElement ) {
+
+						domElement.appendChild( element );
+
+					}
+
+					object.onAfterRender( _this, scene, camera );
+
+				}
+
+				const objectData = {
+					distanceToCameraSquared: getDistanceToSquared( camera, object )
+				};
+
+				cache.objects.set( object, objectData );
+
+			}
+
+			for ( let i = 0, l = object.children.length; i < l; i ++ ) {
+
+				renderObject( object.children[ i ], scene, camera );
+
+			}
+
+		}
+
+		function getDistanceToSquared( object1, object2 ) {
+
+			_a.setFromMatrixPosition( object1.matrixWorld );
+			_b.setFromMatrixPosition( object2.matrixWorld );
+
+			return _a.distanceToSquared( _b );
+
+		}
+
+		function filterAndFlatten( scene ) {
+
+			const result = [];
+
+			scene.traverse( function ( object ) {
+
+				if ( object.isCSS2DObject ) result.push( object );
+
+			} );
+
+			return result;
+
+		}
+
+		function zOrder( scene ) {
+
+			const sorted = filterAndFlatten( scene ).sort( function ( a, b ) {
+
+				if ( a.renderOrder !== b.renderOrder ) {
+
+					return b.renderOrder - a.renderOrder;
+
+				}
+
+				const distanceA = cache.objects.get( a ).distanceToCameraSquared;
+				const distanceB = cache.objects.get( b ).distanceToCameraSquared;
+
+				return distanceA - distanceB;
+
+			} );
+
+			const zMax = sorted.length;
+
+			for ( let i = 0, l = sorted.length; i < l; i ++ ) {
+
+				sorted[ i ].element.style.zIndex = zMax - i;
+
+			}
+
+		}
+
+	}
+
+}
+
+export { CSS2DObject, CSS2DRenderer };

dev/STEPViewer/libs/DragControls.js

@@ -0,0 +1,221 @@
+import {
+	EventDispatcher,
+	Matrix4,
+	Plane,
+	Raycaster,
+	Vector2,
+	Vector3
+} from 'three';
+
+const _plane = new Plane();
+const _raycaster = new Raycaster();
+
+const _pointer = new Vector2();
+const _offset = new Vector3();
+const _intersection = new Vector3();
+const _worldPosition = new Vector3();
+const _inverseMatrix = new Matrix4();
+
+class DragControls extends EventDispatcher {
+
+	constructor( _objects, _camera, _domElement ) {
+
+		super();
+
+		_domElement.style.touchAction = 'none'; // disable touch scroll
+
+		let _selected = null, _hovered = null;
+
+		const _intersections = [];
+
+		//
+
+		const scope = this;
+
+		function activate() {
+
+			_domElement.addEventListener( 'pointermove', onPointerMove );
+			_domElement.addEventListener( 'pointerdown', onPointerDown );
+			_domElement.addEventListener( 'pointerup', onPointerCancel );
+			_domElement.addEventListener( 'pointerleave', onPointerCancel );
+
+		}
+
+		function deactivate() {
+
+			_domElement.removeEventListener( 'pointermove', onPointerMove );
+			_domElement.removeEventListener( 'pointerdown', onPointerDown );
+			_domElement.removeEventListener( 'pointerup', onPointerCancel );
+			_domElement.removeEventListener( 'pointerleave', onPointerCancel );
+
+			_domElement.style.cursor = '';
+
+		}
+
+		function dispose() {
+
+			deactivate();
+
+		}
+
+		function getObjects() {
+
+			return _objects;
+
+		}
+
+		function getRaycaster() {
+
+			return _raycaster;
+
+		}
+
+		function onPointerMove( event ) {
+
+			if ( scope.enabled === false ) return;
+
+			updatePointer( event );
+
+			_raycaster.setFromCamera( _pointer, _camera );
+
+			if ( _selected ) {
+
+				if ( _raycaster.ray.intersectPlane( _plane, _intersection ) ) {
+
+					_selected.position.copy( _intersection.sub( _offset ).applyMatrix4( _inverseMatrix ) );
+
+				}
+
+				scope.dispatchEvent( { type: 'drag', object: _selected } );
+
+				return;
+
+			}
+
+			// hover support
+
+			if ( event.pointerType === 'mouse' || event.pointerType === 'pen' ) {
+
+				_intersections.length = 0;
+
+				_raycaster.setFromCamera( _pointer, _camera );
+				_raycaster.intersectObjects( _objects, scope.recursive, _intersections );
+
+				if ( _intersections.length > 0 ) {
+
+					const object = _intersections[ 0 ].object;
+
+					_plane.setFromNormalAndCoplanarPoint( _camera.getWorldDirection( _plane.normal ), _worldPosition.setFromMatrixPosition( object.matrixWorld ) );
+
+					if ( _hovered !== object && _hovered !== null ) {
+
+						scope.dispatchEvent( { type: 'hoveroff', object: _hovered } );
+
+						_domElement.style.cursor = 'auto';
+						_hovered = null;
+
+					}
+
+					if ( _hovered !== object ) {
+
+						scope.dispatchEvent( { type: 'hoveron', object: object } );
+
+						_domElement.style.cursor = 'pointer';
+						_hovered = object;
+
+					}
+
+				} else {
+
+					if ( _hovered !== null ) {
+
+						scope.dispatchEvent( { type: 'hoveroff', object: _hovered } );
+
+						_domElement.style.cursor = 'auto';
+						_hovered = null;
+
+					}
+
+				}
+
+			}
+
+		}
+
+		function onPointerDown( event ) {
+
+			if ( scope.enabled === false ) return;
+
+			updatePointer( event );
+
+			_intersections.length = 0;
+
+			_raycaster.setFromCamera( _pointer, _camera );
+			_raycaster.intersectObjects( _objects, scope.recursive, _intersections );
+
+			if ( _intersections.length > 0 ) {
+
+				_selected = ( scope.transformGroup === true ) ? _objects[ 0 ] : _intersections[ 0 ].object;
+
+				_plane.setFromNormalAndCoplanarPoint( _camera.getWorldDirection( _plane.normal ), _worldPosition.setFromMatrixPosition( _selected.matrixWorld ) );
+
+				if ( _raycaster.ray.intersectPlane( _plane, _intersection ) ) {
+
+					_inverseMatrix.copy( _selected.parent.matrixWorld ).invert();
+					_offset.copy( _intersection ).sub( _worldPosition.setFromMatrixPosition( _selected.matrixWorld ) );
+
+				}
+
+				_domElement.style.cursor = 'move';
+
+				scope.dispatchEvent( { type: 'dragstart', object: _selected } );
+
+			}
+
+
+		}
+
+		function onPointerCancel() {
+
+			if ( scope.enabled === false ) return;
+
+			if ( _selected ) {
+
+				scope.dispatchEvent( { type: 'dragend', object: _selected } );
+
+				_selected = null;
+
+			}
+
+			_domElement.style.cursor = _hovered ? 'pointer' : 'auto';
+
+		}
+
+		function updatePointer( event ) {
+
+			const rect = _domElement.getBoundingClientRect();
+
+			_pointer.x = ( event.clientX - rect.left ) / rect.width * 2 - 1;
+			_pointer.y = - ( event.clientY - rect.top ) / rect.height * 2 + 1;
+
+		}
+
+		activate();
+
+		// API
+
+		this.enabled = true;
+		this.recursive = true;
+		this.transformGroup = false;
+
+		this.activate = activate;
+		this.deactivate = deactivate;
+		this.dispose = dispose;
+		this.getObjects = getObjects;
+		this.getRaycaster = getRaycaster;
+
+	}
+
+}
+
+export { DragControls };

dev/STEPViewer/libs/RoomEnvironment.js

@@ -0,0 +1,148 @@
+/**
+ * https://github.com/google/model-viewer/blob/master/packages/model-viewer/src/three-components/EnvironmentScene.ts
+ */
+
+import {
+ 	BackSide,
+ 	BoxGeometry,
+ 	Mesh,
+	MeshBasicMaterial,
+ 	MeshStandardMaterial,
+ 	PointLight,
+ 	Scene,
+} from 'three';
+
+class RoomEnvironment extends Scene {
+
+	constructor( renderer = null ) {
+
+		super();
+
+		const geometry = new BoxGeometry();
+		geometry.deleteAttribute( 'uv' );
+
+		const roomMaterial = new MeshStandardMaterial( { side: BackSide } );
+		const boxMaterial = new MeshStandardMaterial();
+
+		let intensity = 5;
+
+		if ( renderer !== null && renderer._useLegacyLights === false ) intensity = 900;
+
+		const mainLight = new PointLight( 0xffffff, intensity, 28, 2 );
+		mainLight.position.set( 0.418, 16.199, 0.300 );
+		this.add( mainLight );
+
+		const room = new Mesh( geometry, roomMaterial );
+		room.position.set( - 0.757, 13.219, 0.717 );
+		room.scale.set( 31.713, 28.305, 28.591 );
+		this.add( room );
+
+		const box1 = new Mesh( geometry, boxMaterial );
+		box1.position.set( - 10.906, 2.009, 1.846 );
+		box1.rotation.set( 0, - 0.195, 0 );
+		box1.scale.set( 2.328, 7.905, 4.651 );
+		this.add( box1 );
+
+		const box2 = new Mesh( geometry, boxMaterial );
+		box2.position.set( - 5.607, - 0.754, - 0.758 );
+		box2.rotation.set( 0, 0.994, 0 );
+		box2.scale.set( 1.970, 1.534, 3.955 );
+		this.add( box2 );
+
+		const box3 = new Mesh( geometry, boxMaterial );
+		box3.position.set( 6.167, 0.857, 7.803 );
+		box3.rotation.set( 0, 0.561, 0 );
+		box3.scale.set( 3.927, 6.285, 3.687 );
+		this.add( box3 );
+
+		const box4 = new Mesh( geometry, boxMaterial );
+		box4.position.set( - 2.017, 0.018, 6.124 );
+		box4.rotation.set( 0, 0.333, 0 );
+		box4.scale.set( 2.002, 4.566, 2.064 );
+		this.add( box4 );
+
+		const box5 = new Mesh( geometry, boxMaterial );
+		box5.position.set( 2.291, - 0.756, - 2.621 );
+		box5.rotation.set( 0, - 0.286, 0 );
+		box5.scale.set( 1.546, 1.552, 1.496 );
+		this.add( box5 );
+
+		const box6 = new Mesh( geometry, boxMaterial );
+		box6.position.set( - 2.193, - 0.369, - 5.547 );
+		box6.rotation.set( 0, 0.516, 0 );
+		box6.scale.set( 3.875, 3.487, 2.986 );
+		this.add( box6 );
+
+
+		// -x right
+		const light1 = new Mesh( geometry, createAreaLightMaterial( 50 ) );
+		light1.position.set( - 16.116, 14.37, 8.208 );
+		light1.scale.set( 0.1, 2.428, 2.739 );
+		this.add( light1 );
+
+		// -x left
+		const light2 = new Mesh( geometry, createAreaLightMaterial( 50 ) );
+		light2.position.set( - 16.109, 18.021, - 8.207 );
+		light2.scale.set( 0.1, 2.425, 2.751 );
+		this.add( light2 );
+
+		// +x
+		const light3 = new Mesh( geometry, createAreaLightMaterial( 17 ) );
+		light3.position.set( 14.904, 12.198, - 1.832 );
+		light3.scale.set( 0.15, 4.265, 6.331 );
+		this.add( light3 );
+
+		// +z
+		const light4 = new Mesh( geometry, createAreaLightMaterial( 43 ) );
+		light4.position.set( - 0.462, 8.89, 14.520 );
+		light4.scale.set( 4.38, 5.441, 0.088 );
+		this.add( light4 );
+
+		// -z
+		const light5 = new Mesh( geometry, createAreaLightMaterial( 20 ) );
+		light5.position.set( 3.235, 11.486, - 12.541 );
+		light5.scale.set( 2.5, 2.0, 0.1 );
+		this.add( light5 );
+
+		// +y
+		const light6 = new Mesh( geometry, createAreaLightMaterial( 100 ) );
+		light6.position.set( 0.0, 20.0, 0.0 );
+		light6.scale.set( 1.0, 0.1, 1.0 );
+		this.add( light6 );
+
+	}
+
+	dispose() {
+
+		const resources = new Set();
+
+		this.traverse( ( object ) => {
+
+			if ( object.isMesh ) {
+
+				resources.add( object.geometry );
+				resources.add( object.material );
+
+			}
+
+		} );
+
+		for ( const resource of resources ) {
+
+			resource.dispose();
+
+		}
+
+	}
+
+}
+
+function createAreaLightMaterial( intensity ) {
+
+	const material = new MeshBasicMaterial();
+	material.color.setScalar( intensity );
+	return material;
+
+}
+
+export { RoomEnvironment };

dev/STEPViewer/samples/__cadgen__/models/.as1-oc-214.stp.generation.lock

@@ -0,0 +1 @@
+1abd7a4468154d459893c526a5c4ad41

dev/STEPViewer/samples/__cadgen__/models/.as1-oc-214.stp.generation.lock.mutex

@@ -0,0 +1 @@
+ 

dev/STEPViewer/samples/__cadgen__/models/.as1-oc-214.stp.generation.progress.json

@@ -0,0 +1 @@
+{"schemaVersion":3,"runId":"1abd7a4468154d459893c526a5c4ad41","pid":37024,"host":"pc2511","kind":"step-package","intent":"write","startedAt":1787997842170,"outcome":"done","updatedAt":1787997865358,"phase":"done","label":"Done","index":0,"count":0,"detail":"","done":0,"total":null,"determinate":false,"phaseStartedAt":1787997865358,"elapsedMs":0,"stageMs":{"generate":22775,"package":54,"components":291,"finalize":5}}

dev/STEPViewer/samples/user/__cadgen__/models/.LZ01001005_H500_2mm.stp.generation.lock

@@ -0,0 +1 @@
+7b6fad96540640f1826d003d2681fe5d

dev/STEPViewer/samples/user/__cadgen__/models/.LZ01001005_H500_2mm.stp.generation.lock.mutex

@@ -0,0 +1 @@
+ 

dev/STEPViewer/samples/user/__cadgen__/models/.LZ01001005_H500_2mm.stp.generation.progress.json

@@ -0,0 +1 @@
+{"schemaVersion":3,"runId":"7b6fad96540640f1826d003d2681fe5d","pid":37024,"host":"pc2511","kind":"step-package","intent":"write","startedAt":1787997977265,"outcome":"done","updatedAt":1787997987714,"phase":"done","label":"Done","index":0,"count":0,"detail":"","done":0,"total":null,"determinate":false,"phaseStartedAt":1787997987714,"elapsedMs":0,"stageMs":{"generate":9984,"package":5,"components":400,"finalize":5}}

dev/STEPViewer/samples/user/__cadgen__/models/LZ01001005_H500_2mm.stp/assembly.json

@@ -0,0 +1 @@
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