{"id":348,"date":"2026-07-11T20:58:15","date_gmt":"2026-07-11T12:58:15","guid":{"rendered":"https:\/\/numsimlab.com\/?p=348"},"modified":"2026-07-11T20:58:15","modified_gmt":"2026-07-11T12:58:15","slug":"cad%e9%a2%86%e5%9f%9f%e7%9f%a2%e9%87%8f%e6%95%b0%e6%8d%ae%e9%9b%b6%e5%9f%ba%e7%a1%80%e5%ae%8c%e6%95%b4%e8%ae%b2%e8%a7%a3","status":"publish","type":"post","link":"https:\/\/numsimlab.com\/?p=348","title":{"rendered":"CAD\u9886\u57df\u77e2\u91cf\u6570\u636e\u96f6\u57fa\u7840\u5b8c\u6574\u8bb2\u89e3"},"content":{"rendered":"\n<meta charset=\"UTF-8\">\n<meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\">\n<title>CAD\u9886\u57df\u77e2\u91cf\u6570\u636e\u96f6\u57fa\u7840\u5b8c\u6574\u8bb2\u89e3<\/title>\n<style>\n\/* \u7edf\u4e00\u539f\u7248\u89c6\u89c9\u53d8\u91cf\u4e0e\u57fa\u7840\u6837\u5f0f *\/\n*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}\nhtml{scroll-behavior:smooth}\n:root{\n  --bg:#f8f9fa;--bg2:#fff;--ink:#1a1a2e;--muted:#6c7086;--rule:#e2e4eb;\n  --accent:#2563eb;--accent2:#16a34a;--accent3:#dc2626;--accent4:#d97706;--accent5:#7c3aed;\n  --card-bg:#fff;--code-bg:#f1f3f5;\n  --tag-g:#dcfce7;--tag-g-t:#166534;--tag-b:#dbeafe;--tag-b-t:#1e40af;\n  --tag-r:#fee2e2;--tag-r-t:#991b1b;--tag-y:#fef9c3;--tag-y-t:#713f12;--tag-p:#f3e8ff;--tag-p-t:#581c87;\n  --shadow:0 1px 3px rgba(0,0,.08);--radius:8px;--max-w:960px\n}\n[data-theme=\"dark\"]{\n  --bg:#0b0b1a;--bg2:#16162a;--ink:#e2e4f0;--muted:#7f8396;--rule:#26263e;\n  --accent:#60a5fa;--accent2:#4ade80;--accent3:#f87171;--accent4:#fbbf24;--accent5:#a78bfa;\n  --card-bg:#16162a;--code-bg:#1e2436;\n  --tag-g:#14532d;--tag-g-t:#bbf7d0;--tag-b:#1e3a5f;--tag-b-t:#bfdbfe;\n  --tag-r:#7f1d1d;--tag-r-t:#fecaca;--tag-y:#713f12;--tag-y-t:#fef08a;\n  --tag-p:#3b1f6e;--tag-p-t:#e9d5ff;\n  --shadow:0 1px 3px rgba(0,0,.3)\n}\nbody{\n  font-family:-apple-system,BlinkMacSystemFont,\"Segoe UI\",\"Noto Sans SC\",\"PingFang SC\",\"Microsoft YaHei\",sans-serif;\n  background:var(--bg);color:var(--ink);line-height:1.7;font-size:15px;\n  transition:background .3s,color .3s;\n}\n\/* \u5bfc\u822a\u680f *\/\nheader{\n  position:fixed;top:0;left:0;right:0;z-index:100;\n  background:var(--bg2);border-bottom:1px solid var(--rule);\n  backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);\n}\n.header-wrap{\n  max-width:var(--max-w);margin:0 auto;\n  display:flex;align-items:center;justify-content:space-between;\n  padding:0 1.2rem;height:56px;\n}\n.log{\n  font-weight:700;font-size:.98rem;color:var(--accent);\n  display:flex;align-items:center;gap:.5rem;\n}\n.header-ctrl{display:flex;gap:.6rem;align-items:center}\n.lang-switch{display:flex;border:1px solid var(--rule);border-radius:6px;overflow:hidden}\n.lang-switch button{\n  border:none;background:transparent;color:var(--muted);\n  padding:.3rem .7rem;font-size:.8rem;cursor:pointer;\n  transition:.2s all;font-family:inherit;\n}\n.lang-switch button.active{background:var(--accent);color:#fff}\n.lang-switch button:hover:not(.active){background:var(--rule);color:var(--ink)}\n.theme-btn{\n  width:34px;height:34px;border:1px solid var(--rule);\n  background:transparent;border-radius:6px;color:var(--muted);\n  cursor:pointer;font-size:1rem;display:flex;align-items:center;justify-content:center;\n}\n.theme-btn:hover{background:var(--rule);color:var(--ink)}\n\n\/* \u4e3b\u4f53\u5bb9\u5668 *\/\nmain{max-width:var(--max-w);margin:0 auto;padding:80px 1.2rem 4rem}\n.lang-block{display:none}\n.lang-block.active{display:block}\n\n\/* \u6807\u9898\u6587\u672c *\/\n.hero{text-align:center;margin-bottom:2.5rem}\nh1{font-size:1.8rem;font-weight:800;margin-bottom:.4rem;letter-spacing:-.02em}\nh1 .desc-sub{display:block;font-size:.86rem;color:var(--muted);font-weight:400;margin-top:.3rem}\nh2{\n  font-size:1.3rem;font-weight:700;margin:2.2rem 0 .9rem;\n  padding-bottom:.4rem;border-bottom:2px solid var(--accent);\n}\nh3{font-size:1.05rem;font-weight:600;margin:1.4rem 0 .5rem;color:var(--accent)}\nh4{font-size:.96rem;font-weight:600;margin:.9rem 0 .3rem}\np{margin-bottom:.8rem}\na{color:var(--accent);text-decoration:none}\na:hover{text-decoration:underline}\n\n\/* \u6807\u7b7e *\/\n.tag{\n  display:inline-block;padding:.14rem .5rem;border-radius:4px;\n  font-size:.73rem;font-weight:600;margin-right:.3rem;white-space:nowrap;\n}\n.tag-g{background:var(--tag-g);color:var(--tag-g-t)}\n.tag-b{background:var(--tag-b);color:var(--tag-b-t)}\n.tag-p{background:var(--tag-p);color:var(--tag-p-t)}\n.tag-y{background:var(--tag-y);color:var(--tag-y-t)}\n.tag-r{background:var(--tag-r);color:var(--tag-r-t)}\n\n\/* \u5361\u7247\u3001\u63d0\u793a\u6846 *\/\n.card{\n  background:var(--card-bg);border:1px solid var(--rule);\n  border-radius:var(--radius);padding:1.3rem;margin-bottom:1.2rem;\n  box-shadow:var(--shadow);\n}\n.tip-box{\n  background:var(--bg);border-left:4px solid var(--accent);\n  padding:.9rem 1rem;margin:1rem 0;border-radius:0 var(--radius) var(--radius) 0;\n  font-size:.88rem;\n}\n.tip-box.warn{border-left-color:var(--accent4)}\n.tip-box.danger{border-left-color:var(--accent3)}\n.tip-box strong{color:var(--accent)}\n\n\/* \u76ee\u5f55 *\/\n.toc-box{\n  background:var(--card-bg);border:1px solid var(--rule);\n  border-radius:var(--radius);padding:1.2rem 1.4rem;margin-bottom:2.2rem;\n  box-shadow:var(--shadow);\n}\n.toc-box h3{margin:0 0 .6rem;font-size:.9rem;text-transform:uppercase;color:var(--muted)}\n.toc-box ol{padding-left:1.3rem}\n.toc-box li{margin-bottom:.3rem;font-size:.88rem}\n.toc-box a{color:var(--ink)}\n.toc-box a:hover{color:var(--accent);text-decoration:none}\n\n\/* \u4ee3\u7801\u3001\u7ec8\u7aef *\/\npre.code{\n  background:var(--code-bg);padding:.9rem 1rem;border-radius:var(--radius);\n  overflow-x:auto;font-family:\"SF Mono\",Consolas,\"Courier New\",monospace;\n  font-size:.82rem;line-height:1.5;margin:.7rem 0;border:1px solid var(--rule);\n}\ncode.inline{\n  background:var(--code-bg);padding:.13rem .4rem;border-radius:4px;\n  font-family:monospace;font-size:.83rem;border:1px solid var(--rule);\n}\n.terminal{\n  background:#1a1a2e;color:#a8e6cf;padding:.9rem 1rem;border-radius:var(--radius);\n  font-family:monospace;font-size:.82rem;overflow-x:auto;margin:.7rem 0;\n  border:1px solid #333;line-height:1.6;\n}\n[data-theme=\"dark\"] .terminal{background:#08081a}\n\n\/* \u53cc\u5bf9\u6bd4\u680f *\/\n.compare-wrap{\n  display:grid;grid-template-columns:1fr 1fr;gap:1rem;margin:1.2rem 0;\n}\n.compare-item{\n  background:var(--card-bg);border:1px solid var(--rule);\n  border-radius:var(--radius);padding:1rem;box-shadow:var(--shadow);\n}\n.compare-item.bad h4{color:var(--accent3)}\n.compare-item.good h4{color:var(--accent2)}\n\n\/* \u547d\u4ee4\u5361\u7247\u7f51\u683c *\/\n.cmd-grid{\n  display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:.8rem;margin:1.2rem 0;\n}\n.cmd-card{\n  background:var(--card-bg);border:1px solid var(--rule);\n  border-radius:var(--radius);padding:.9rem;box-shadow:var(--shadow);\n}\n.cmd-card h4{margin:0 0 .4rem;font-size:.88rem;color:var(--accent)}\n.cmd-card .cmd-line{\n  display:block;background:var(--code-bg);padding:.3rem .5rem;border-radius:4px;\n  font-family:monospace;font-size:.8rem;margin-bottom:.3rem;overflow-x:auto;\n}\n.cmd-card .desc{font-size:.8rem;color:var(--muted)}\n\n\/* \u6b65\u9aa4\u5217\u8868 *\/\n.step-list{\n  list-style:none;counter-reset:step;margin:1.2rem 0;\n}\n.step-list li{\n  counter-increment:step;position:relative;padding:.9rem 1rem .9rem 3rem;\n  margin-bottom:.6rem;background:var(--card-bg);border-left:2px solid var(--rule);\n  border-radius:0 var(--radius) 0;box-shadow:var(--shadow);\n}\n.step-list li::before{\n  content:counter(step);position:absolute;left:-14px;top:.9rem;\n  width:28px;height:28px;border-radius:50%;background:var(--accent);\n  color:#fff;display:flex;align-items:center;justify-content:center;\n  font-size:.78rem;font-weight:700;\n}\n.step-list .cmd-line{\n  display:block;background:var(--code-bg);padding:.4rem .7rem;border-radius:5px;\n  font-family:monospace;margin:.4rem 0;overflow-x:auto;font-size:.82rem;\n}\n\n\/* \u8868\u683c *\/\n.table-box{overflow-x:auto;margin:1.2rem 0}\ntable{width:100%;border-collapse:collapse;font-size:.82rem}\nthead th{\n  background:var(--accent);color:#fff;padding:.6rem .5rem;text-align:center;\n  font-weight:600;\n}\nthead th:first-child{border-radius:6px 0 0 0}\nthead th:last-child{border-radius:0 6px 0 0}\ntbody td{padding:.6rem .5rem;border-bottom:1px solid var(--rule);vertical-align:middle}\ntbody tr:nth-child(even){background:var(--bg)}\ntbody td:first{text-align:left;font-weight:600}\n\n\/* \u5e95\u90e8 *\/\nfooter{\n  max-width:var(--max-w);margin:4rem auto 0;padding:2rem 1rem 3rem;\n  border-top:1px solid var(--rule);text-align:center;font-size:.82rem;color:var(--muted);\n}\n\n\/* \u79fb\u52a8\u7aef\u9002\u914d *\/\n@media (max-width:660px){\n  h1{font-size:1.45rem}\n  .compare-wrap{grid-template-columns:1fr}\n  .cmd-grid{grid-template-columns:1fr}\n  .step-list li{padding-left:2.5rem}\n  .step-list li::before{width:24px;height:24px;left:-12px;font-size:.7rem}\n  main{padding:74px 1rem 3rem}\n}\n<\/style>\n\n<header>\n  <div class=\"header-wrap\">\n    <div class=\"logo\"><span>\ud83d\udcd0<\/span> CAD\u9886\u57df\u77e2\u91cf\u6570\u636e\u5b8c\u6574\u8bb2\u89e3<\/div>\n    <div class=\"header-ctrl\">\n      <div class=\"lang-switch\">\n        <button class=\"active\" onclick=\"switchLang('zh')\" id=\"btn-zh\">\u4e2d\u6587<\/button>\n        <button onclick=\"switchLang('en')\" id=\"btn-en\">English<\/button>\n      <\/div>\n      <button class=\"theme-btn\" onclick=\"toggleDark()\" title=\"\u5207\u6362\u660e\u6697\u4e3b\u9898\">\u263c<\/button>\n    <\/div>\n  <\/div>\n<\/header>\n<main>\n<!-- \u4e2d\u6587\u5185\u5bb9 -->\n<div class=\"lang-block active\" id=\"zh-content\">\n  <div class=\"hero\">\n    <h1>CAD\u9886\u57df\u77e2\u91cf\u6570\u636e\u96f6\u57fa\u7840\u5b8c\u6574\u8bb2\u89e3<\/h1>\n    <div class=\"desc-sub\">\u5b9a\u4e49\u3001\u5e95\u5c42\u5b58\u50a8\u3001\u6838\u5fc3\u56fe\u5143\u3001\u4e0e\u6805\u683c\u533a\u522b\u3001\u6587\u4ef6\u683c\u5f0f\u3001\u5de5\u7a0b\u4f18\u52bf\u3001\u77e2\u91cf\u5316\u5b9e\u64cd\u5168\u68b3\u7406<\/div>\n  <\/div>\n\n  <div class=\"toc-box\">\n    <h3>\u76ee\u5f55\u5bfc\u822a<\/h3>\n    <ol>\n      <li><a href=\"#p1\">\u4e00\u3001CAD\u4e2d\u77e2\u91cf\u6570\u636e\u6838\u5fc3\u5b9a\u4e49<\/a><\/li>\n      <li><a href=\"#p2\">\u4e8c\u3001\u77e2\u91cf\u6570\u636e\u5e95\u5c42\u5b58\u50a8\u903b\u8f91\uff08\u6570\u5b66\u63cf\u8ff0\uff09<\/a><\/li>\n      <li><a href=\"#p3\">\u4e09\u3001CAD\u6807\u51c6\u77e2\u91cf\u56fe\u5143\u5206\u7c7b\uff082D+3D\uff09<\/a><\/li>\n      <li><a href=\"#p4\">\u56db\u3001\u77e2\u91cfVS\u6805\u683c\uff08CAD\u56fe\u7eb8\u6838\u5fc3\u5bf9\u6bd4\uff09<\/a><\/li>\n      <li><a href=\"#p5\">\u4e94\u3001CAD\u77e2\u91cf\u914d\u5957\u7ba1\u7406\uff1a\u56fe\u5c42\/\u5757\/\u5c5e\u6027<\/a><\/li>\n      <li><a href=\"#p6\">\u516d\u3001CAD\u4e3b\u6d41\u77e2\u91cf\u6587\u4ef6DWG\/DXF<\/a><\/li>\n      <li><a href=\"#p7\">\u4e03\u3001\u77e2\u91cf\u6570\u636e\u5de5\u7a0b\u6838\u5fc3\u4f18\u52bf<\/a><\/li>\n      <li><a href=\"#p8\">\u516b\u3001CAD\u77e2\u91cf\u5316\uff08\u5149\u6805\u8f6c\u77e2\u91cf\uff09\u5e94\u7528\u573a\u666f<\/a><\/li>\n      <li><a href=\"#p9\">\u4e5d\u3001\u77e2\u91cf\u6570\u636e\u5c40\u9650\u4e0e\u6ce8\u610f\u4e8b\u9879<\/a><\/li>\n    <\/ol>\n  <\/div>\n\n  <h2 id=\"p1\">\u4e00\u3001CAD\u4e2d\u77e2\u91cf\u6570\u636e\u6838\u5fc3\u5b9a\u4e49<\/h2>\n  <div class=\"card\">\n    <h4>\u901a\u4fd7\u7406\u89e3<\/h4>\n    <p><span class=\"tag-b\">CAD\u77e2\u91cf\u6570\u636e\uff08Vector Data\uff09<\/span>\u662f\u8ba1\u7b97\u673a\u8f85\u52a9\u8bbe\u8ba1\u4e13\u7528\u51e0\u4f55\u6570\u636e\u6a21\u578b\uff0c\u4e0d\u9760\u50cf\u7d20\u70b9\u9635\u5b58\u56fe\uff0c\u800c\u662f\u901a\u8fc7<strong>\u5750\u6807\u3001\u6570\u5b66\u65b9\u7a0b\u3001\u53c2\u6570<\/strong>\u8bb0\u5f55\u6240\u6709\u56fe\u5f62\u5b9e\u4f53\uff0c\u662f\u673a\u68b0\u3001\u5efa\u7b51\u3001\u5e02\u653fCAD\u56fe\u7eb8\u552f\u4e00\u6807\u51c6\u6570\u636e\u683c\u5f0f\u3002<\/p>\n    <p>\u7c7b\u6bd4\u7406\u89e3\uff1a\u6805\u683c\uff08JPG\u626b\u63cf\u56fe\uff09\u50cf\u9a6c\u8d5b\u514b\u62fc\u56fe\uff0c\u653e\u5927\u7cca\uff1b\u77e2\u91cf\u50cf\u51e0\u4f55\u516c\u5f0f\uff0c\u65e0\u8bba\u653e\u592710\u500d\/100\u500d\uff0c\u7ebf\u6761\u6c38\u8fdc\u9510\u5229\uff0c\u5c3a\u5bf8\u6570\u503c\u5b8c\u5168\u4e0d\u53d8\u3002<\/p>\n    <p>\u5de5\u7a0b\u672c\u8d28\uff1aCAD\u6240\u6709\u5c3a\u5bf8\u6807\u6ce8\u3001\u52a0\u5de5\u51fa\u56fe\u3001CN\u52a0\u5de5\u3001BIM\u5efa\u6a21\u5168\u90e8\u4f9d\u8d56\u77e2\u91cf\uff0c\u53ea\u6709\u77e2\u91cf\u80fd\u8f93\u51fa\u7cbe\u786e\u6beb\u7c73\u7ea7\u5750\u6807\u53c2\u6570\u3002<\/p>\n  <\/div>\n  <div class=\"tip-box\">\n    <strong>\u5173\u952e\u7279\u5f81\uff1a<\/strong>\u77e2\u91cf\u5177\u5907\u65e0\u9650\u5206\u8fa8\u7387\u3001\u53c2\u6570\u53ef\u7f16\u8f91\u3001\u5e26\u5de5\u7a0b\u5c5e\u6027\u3001\u652f\u6301\u5c3a\u5bf8\u7cbe\u51c6\u8ba1\u7b97\u3002\n  <\/div>\n\n  <h2 id=\"p2\">\u4e8c\u3001\u77e2\u91cf\u6570\u636e\u5e95\u5c42\u5b58\u50a8\u903b\u8f91\uff08\u6570\u5b66\u63cf\u8ff0\uff09<\/h2>\n  <div class=\"card\">\n    <p>CAD\u4e0d\u4fdd\u5b58\u753b\u9762\u50cf\u7d20\uff0c\u53ea\u5b58\u51e0\u4f55\u53c2\u6570\uff0c\u4e3e3\u4e2a\u5178\u578b\u5b9e\u4f53\uff1a<\/p>\n    <ul>\n      <li>\u76f4\u7ebf\uff1a\u8d77\u70b9(X1,Y1)\u3001\u7ec8\u70b9(X2,Y2)\u3001\u7ebf\u578b\u3001\u7ebf\u5bbd\u3001\u56fe\u5c42\uff1b<\/li>\n      <li>\u5706\u5f62\uff1a\u5706\u5fc3(X0,Y0)\u3001\u534a\u5f84R\u3001\u586b\u5145\/\u8f6e\u5ed3\u3001\u989c\u8272\uff1b<\/li>\n      <li>NURBS\u66f2\u7ebf\uff1a\u63a7\u5236\u70b9\u5e8f\u5217\u3001\u6743\u91cd\u3001\u9636\u6b21\uff08\u66f2\u9762\u5efa\u6a21\u6838\u5fc3\uff09\u3002<\/li>\n    <\/ul>\n    <p>\u6e32\u67d3\u539f\u7406\uff1a\u7f29\u653e\u89c6\u56fe\u65f6CPU\u5b9e\u65f6\u6839\u636e\u516c\u5f0f\u91cd\u7ed8\u7ebf\u6761\uff0c\u4e0d\u4f1a\u65b0\u589e\u50cf\u7d20\u952f\u9f7f\uff0c\u5c3a\u5bf8\u7cbe\u5ea6\u4e0d\u53d7\u7f29\u653e\u5f71\u54cd\u3002<\/p>\n  <\/div>\n<pre class=\"code\">\n# CAD\u5706\u5f62\u77e2\u91cf\u5b58\u50a8\u4f2a\u4ee3\u7801\n{\n  type: \"circle\",\n  center: [100.0, 200.0],\n  radius: 50.5,\n  layer: \"\u4e2d\u5fc3\u7ebf\",\n  linetype: \"center\",\n  color: 4\n}\n<\/pre>\n\n  <h2 id=\"p3\">\u4e09\u3001CAD\u6807\u51c6\u77e2\u91cf\u56fe\u5143\u5206\u7c7b\uff082D+3D\uff09<\/h2>\n  <div class=\"cmd-grid\">\n    <div class=\"cmd-card\">\n      <h4>2D\u57fa\u7840\u77e2\u91cf\u5b9e\u4f53<\/h4>\n      <div class=\"desc\">Line\u76f4\u7ebf\u3001Arc\u5706\u5f27\u3001Circle\u5706\u3001Polyline\u591a\u6bb5\u7ebf\u3001Spline\u6837\u6761\u3001Hatch\u586b\u5145\u3001Text\u6587\u5b57\u3001Dimension\u6807\u6ce8<\/div>\n    <\/div>\n    <div class=\"cmd-card\">\n      <h4>2D\u590d\u5408\u77e2\u91cf\uff08\u5757Block\uff09<\/h4>\n      <div class=\"desc\">\u95e8\u7a97\u3001\u87ba\u6813\u3001\u6807\u51c6\u4ef6\uff0c\u4e00\u7ec4\u77e2\u91cf\u6253\u5305\uff0c\u5168\u5c40\u540c\u6b65\u4fee\u6539<\/div>\n    <\/div>\n    <div class=\"cmd-card\">\n      <h4>3D\u66f2\u9762\u77e2\u91cf\uff08NURBS\uff09<\/h4>\n      <div class=\"desc\">\u81ea\u7531\u66f2\u9762\u3001\u6c7d\u8f66\/\u6a21\u5177\u66f2\u9762\uff0c\u7cbe\u786e\u66f2\u7ebf\u6570\u5b66\u6a21\u578b<\/div>\n    <\/div>\n    <div class=\"cmd-card\">\n      <h4>3D\u5b9e\u4f53\u77e2\u91cf<\/h4>\n      <div class=\"desc\">Box\u3001\u5706\u67f1\u3001\u62c9\u4f38\/\u65cb\u8f6c\u5b9e\u4f53\uff0c\u53ef\u8ba1\u7b97\u4f53\u79ef\u91cd\u91cf<\/div>\n    <\/div>\n  <\/div>\n  <div class=\"tip-box warn\">\n    <strong>\u884c\u4e1a\u91cd\u70b9\uff1a<\/strong>Polyline\u591a\u6bb5\u7ebf\u662fCAD\u6700\u5e38\u7528\u77e2\u91cf\uff0c\u8fde\u7eed\u6298\u7ebf\/\u8f6e\u5ed3\u4e00\u4f53\uff0c\u65b9\u4fbf\u504f\u79fb\u3001\u4fee\u526a\u3001\u751f\u6210\u9762\u57df\u3002\n  <\/div>\n\n  <h2 id=\"p4\">\u56db\u3001\u77e2\u91cfVS\u6805\u683c\uff08CAD\u56fe\u7eb8\u6838\u5fc3\u5bf9\u6bd4\uff09<\/h2>\n  <div class=\"compare-wrap\">\n    <div class=\"compare-item good\">\n      <h4>CAD\u77e2\u91cf\u6570\u636e\uff08DWG\/DXF\uff09<\/h4>\n      <ul>\n        <li>\u6570\u5b66\u5750\u6807\u5b58\u50a8\uff0c\u65e0\u9650\u7f29\u653e\u65e0\u952f\u9f7f<\/li>\n        <li>\u5355\u6839\u7ebf\u6761\u53ef\u5355\u72ec\u9009\u4e2d\u7f16\u8f91\u3001\u6539\u5c3a\u5bf8<\/li>\n        <li>\u81ea\u5e26\u957f\u5ea6\u3001\u9762\u79ef\u3001\u5750\u6807\uff0c\u652f\u6301\u52a0\u5de5\u8ba1\u7b97<\/li>\n        <li>\u5206\u5c42\u7ba1\u7406\uff0c\u53ef\u5173\u95ed\/\u51bb\u7ed3\u5c40\u90e8\u56fe\u5f62<\/li>\n        <li>CNC\u673a\u5e8a\u30013D\u6253\u5370\u76f4\u63a5\u8bfb\u53d6\u53c2\u6570<\/li>\n      <\/ul>\n    <\/div>\n    <div class=\"compare-item bad\">\n      <h4>\u6805\u683c\u56fe\u50cf\uff08JPG\/TIF\u626b\u63cf\u56fe\uff09<\/h4>\n      <ul>\n        <li>\u50cf\u7d20\u70b9\u9635\uff0c\u653e\u5927\u51fa\u73b0\u9a6c\u8d5b\u514b\u952f\u9f7f<\/li>\n        <li>\u6574\u5f20\u56fe\u7247\u4e00\u4f53\uff0c\u65e0\u6cd5\u5355\u72ec\u4fee\u6539\u7ebf\u6761<\/li>\n        <li>\u65e0\u5c3a\u5bf8\u53c2\u6570\uff0c\u4e0d\u80fd\u81ea\u52a8\u7b97\u9762\u79ef<\/li>\n        <li>\u65e0\u56fe\u5c42\uff0c\u65e0\u6cd5\u5206\u90e8\u4ef6\u9690\u85cf<\/li>\n        <li>\u4ec5\u505a\u53c2\u8003\uff0c\u4e0d\u80fd\u7528\u4e8e\u751f\u4ea7\u52a0\u5de5<\/li>\n      <\/ul>\n    <\/div>\n  <\/div>\n  <div class=\"table-box\">\n    <table>\n      <thead>\n        <tr>\n          <th>\u5bf9\u6bd4\u7ef4\u5ea6<\/th>\n          <th>\u77e2\u91cf\u6570\u636e<\/th>\n          <th>\u6805\u683c\u4f4d\u56fe<\/th>\n        <\/tr>\n      <\/thead>\n      <tbody>\n        <tr>\n          <td>\u5b58\u50a8\u65b9\u5f0f<\/td>\n          <td>\u5750\u6807\/\u6570\u5b66\u53c2\u6570<\/td>\n          <td>\u50cf\u7d20RGB\u70b9\u9635<\/td>\n        <\/tr>\n        <tr>\n          <td>\u7f29\u653e\u6548\u679c<\/td>\n          <td>\u6c38\u4e45\u6e05\u6670\u65e0\u5931\u771f<\/td>\n          <td>\u653e\u5927\u6a21\u7cca\u3001\u952f\u9f7f<\/td>\n        <\/tr>\n        <tr>\n          <td>\u7f16\u8f91\u7c92\u5ea6<\/td>\n          <td>\u5355\u6839\u7ebf\u6761\u72ec\u7acb\u7f16\u8f91<\/td>\n          <td>\u6574\u5f20\u56fe\u7247\u6574\u4f53<\/td>\n        <\/tr>\n        <tr>\n          <td>\u5de5\u7a0b\u53ef\u7528\u6027<\/td>\n          <td>\u53ef\u51fa\u56fe\u3001CNC\u3001BIM\u8ba1\u7b97<\/td>\n          <td>\u4ec5\u53c2\u8003\u56fe\u7eb8\uff0c\u4e0d\u53ef\u751f\u4ea7<\/td>\n        <\/tr>\n        <tr>\n          <td>\u6587\u4ef6\u4f53\u79ef<\/td>\n          <td>\u590d\u6742\u56fe\u7eb8\u4f53\u79ef\u66f4\u5c0f<\/td>\n          <td>\u9ad8\u6e05\u626b\u63cf\u56fe\u4f53\u79ef\u5de8\u5927<\/td>\n        <\/tr>\n      <\/table>\n  <\/div>\n\n  <h2 id=\"p5\">\u4e94\u3001CAD\u77e2\u91cf\u914d\u5957\u7ba1\u7406\uff1a\u56fe\u5c42\/\u5757\/\u5c5e\u6027<\/h2>\n  <div class=\"card\">\n    <h3>1. \u56fe\u5c42\uff08Layer\uff09<\/h3>\n    <p>\u77e2\u91cf\u5206\u7c7b\u5bb9\u5668\uff0c\u540c\u7c7b\u578b\u77e2\u91cf\u653e\u4e00\u5c42\uff1a\u673a\u68b0\u5206\u7c97\u5b9e\u7ebf\u3001\u4e2d\u5fc3\u7ebf\u3001\u6807\u6ce8\uff1b\u5efa\u7b51\u5206\u5899\u4f53\u3001\u95e8\u7a97\u3001\u8f74\u7ebf\u3002\u53ef\u5173\u95ed\/\u51bb\u7ed3\/\u9501\u5b9a\u56fe\u5c42\uff0c\u9690\u85cf\u65e0\u5173\u77e2\u91cf\u7b80\u5316\u89c6\u56fe\u3002<\/p>\n    <h3>2. \u5757\uff08Block\uff09<\/h3>\n    <p>\u591a\u4e2a\u77e2\u91cf\u6253\u5305\u6210\u590d\u7528\u5355\u5143\uff08\u87ba\u6813\u3001\u95e8\u7a97\uff09\uff0c\u4fee\u6539\u5757\u5b9a\u4e49\uff0c\u5168\u56fe\u6240\u6709\u5b9e\u4f8b\u540c\u6b65\u66f4\u65b0\uff0c\u5927\u5e45\u51cf\u5c11\u91cd\u590d\u77e2\u91cf\u5b58\u50a8\u3002<\/p>\n    <h3>3. \u5c5e\u6027\uff08Attribute\uff09<\/h3>\n    <p>\u77e2\u91cf\u7ed1\u5b9a\u6587\u5b57\u53c2\u6570\uff1a\u96f6\u4ef6\u7f16\u53f7\u3001\u539a\u5ea6\u3001\u6750\u8d28\uff0c\u5bfc\u51fa\u8868\u683c\u7528\u4e8e\u751f\u4ea7\u6e05\u5355\u3002<\/p>\n  <\/div>\n\n  <h2 id=\"p6\">\u516d\u3001CAD\u4e3b\u6d41\u77e2\u91cf\u6587\u4ef6DWG\/DXF<\/h2>\n  <div class=\"cmd-grid\">\n    <div class=\"cmd-card\">\n      <h4>DWG<\/h4>\n      <div class=\"desc\">AutoCAD\u539f\u751f\u4e8c\u8fdb\u5236\u77e2\u91cf\u683c\u5f0f\uff0c\u5b58\u50a8\u5b8c\u6574\u56fe\u5c42\u3001\u5757\u30013D\u5b9e\u4f53\uff0c\u5de5\u4e1a\u6807\u51c6\u539f\u56fe\u683c\u5f0f<\/div>\n    <\/div>\n    <div class=\"cmd-card\">\n      <h4>DXF<\/h4>\n      <div class=\"desc\">\u5f00\u653eASCII\u77e2\u91cf\u4ea4\u6362\u683c\u5f0f\uff0c\u6240\u6709CAD\/CAM\/GIS\u4e92\u901a\uff0c\u7528\u4e8e\u8de8\u8f6f\u4ef6\u56fe\u7eb8\u4f20\u9012<\/div>\n    <\/div>\n    <div class=\"cmd-card\">\n      <h4>DWF\/DWFX<\/h4>\n      <div class=\"desc\">\u8f7b\u91cf\u5316\u77e2\u91cf\u770b\u56fe\u683c\u5f0f\uff0c\u4e0d\u53ef\u7f16\u8f91\uff0c\u7528\u4e8e\u5bf9\u5916\u5ba1\u56fe\u5206\u53d1<\/div>\n    <\/div>\n    <div class=\"cmd-card\">\n      <h4>STEP\/IGS<\/h4>\n      <div class=\"desc\">\u4e09\u7ef4\u77e2\u91cf\u4ea4\u6362\uff0c\u6a21\u5177\u673a\u68b03D\u6a21\u578b\u8de8\u8f6f\u4ef6\u901a\u7528<\/div>\n    <\/div>\n  <\/div>\n\n  <h2 id=\"p7\">\u4e03\u3001\u77e2\u91cf\u6570\u636e\u5de5\u7a0b\u6838\u5fc3\u4f18\u52bf<\/h2>\n  <ol class=\"step-list\">\n    <li>\u7cbe\u5ea6\u65e0\u635f\uff1a\u4efb\u610f\u7f29\u653e\u3001\u6253\u5370\uff0c\u6beb\u7c73\u7ea7\u5c3a\u5bf8\u6c38\u8fdc\u51c6\u786e\uff1b<\/li>\n    <li>\u7075\u6d3b\u7f16\u8f91\uff1a\u5355\u4e00\u7ebf\u6761\u3001\u9876\u70b9\u53ef\u62d6\u62fd\u4fee\u6539\uff0c\u65e0\u9700\u91cd\u753b\u6574\u5f20\u56fe\uff1b<\/li>\n    <li>\u53ef\u8ba1\u7b97\u51e0\u4f55\uff1a\u81ea\u52a8\u7b97\u5468\u957f\u3001\u9762\u79ef\u3001\u4f53\u79ef\u3001\u91cd\u5fc3\uff1b<\/li>\n    <li>\u5206\u5c42\u7ba1\u63a7\uff1a\u5206\u4e13\u4e1a\u9690\u85cf\u77e2\u91cf\uff0c\u590d\u6742\u603b\u56fe\u8f7b\u91cf\u5316\uff1b<\/li>\n    <li>\u751f\u4ea7\u4e92\u901a\uff1a\u76f4\u63a5\u5bfc\u5165CNC\u30013D\u6253\u5370\u3001BIM\u8f6f\u4ef6\uff1b<\/li>\n    <li>\u590d\u7528\u9ad8\u6548\uff1a\u5757\u5b9a\u4e49\u6279\u91cf\u590d\u7528\uff0c\u51cf\u5c11\u5197\u4f59\u6570\u636e\u3002<\/li>\n  <\/ol>\n\n  <h2 id=\"p8\">\u516b\u3001CAD\u77e2\u91cf\u5316\uff08\u5149\u6805\u8f6c\u77e2\u91cf\uff09\u5e94\u7528\u573a\u666f<\/h2>\n  <div class=\"card\">\n    <p>\u77e2\u91cf\u5316=\u626b\u63cf\u56fe\u7eb8\/\u7167\u7247\u6805\u683c\u56fe \u2192 \u8f6c\u6362\u6210\u53ef\u7f16\u8f91CAD\u77e2\u91cf\uff0c\u884c\u4e1a\u5e38\u7528\u573a\u666f\uff1a<\/p>\n    <ul>\n      <li>\u8001\u65e7\u7eb8\u8d28\u84dd\u56fe\u626b\u63cf\uff0c\u6570\u5b57\u5316\u91cd\u5efa\u77e2\u91cf\u56fe\u7eb8\uff1b<\/li>\n      <li>\u822a\u62cd\u70b9\u4e91\u3001\u6d4b\u7ed8\u56fe\u7247\u8f6c\u7b49\u9ad8\u7ebf\u77e2\u91cf\uff1b<\/li>\n      <li>PDF\u626b\u63cf\u5de5\u7a0b\u56fe\uff0c\u63d0\u53d6\u7ebf\u6761\u505a\u4e8c\u6b21\u8bbe\u8ba1\uff1b<\/li>\n      <li>\u88c5\u4fee\u624b\u7ed8\u7a3f\u8f6cCAD\u65bd\u5de5\u56fe\u77e2\u91cf\u3002<\/li>\n    <\/ul>\n  <\/div>\n  <div class=\"info-box warn\">\n    <strong>\u6ce8\u610f\uff1a<\/strong>\u81ea\u52a8\u77e2\u91cf\u5316\u4f1a\u4ea7\u751f\u65ad\u7ebf\u3001\u91cd\u53e0\uff0c\u5fc5\u987b\u4eba\u5de5\u4fee\u6b63\u77e2\u91cf\u9876\u70b9\u3002\n  <\/div>\n\n  <h2 id=\"p9\">\u4e5d\u3001\u77e2\u91cf\u6570\u636e\u5c40\u9650\u4e0e\u6ce8\u610f\u4e8b\u9879<\/h2>\n  <div class=\"compare-wrap\">\n    <div class=\"compare-item bad\">\n      <h4>\u77e2\u91cf\u5c40\u9650\u6027<\/h4>\n      <ul>\n        <li>\u590d\u6742\u5b9e\u666f\u7eb9\u7406\u65e0\u6cd5\u8868\u8fbe\uff0c\u5fc5\u987b\u642d\u914d\u6805\u683c\u8d34\u56fe\uff1b<\/li>\n        <li>\u6d77\u91cf\u5fae\u5c0f\u77e2\u91cf\uff08\u767e\u4e07\u70b9\uff09\u4f1a\u9020\u6210CAD\u5361\u987f\uff1b<\/li>\n        <li>\u7b80\u5355\u622a\u56fe\u8f6c\u77e2\u91cf\u65e0\u610f\u4e49\uff0c\u53cd\u800c\u589e\u5927\u6587\u4ef6\uff1b<\/li>\n      <\/ul>\n    <\/div>\n    <div class=\"compare-item good\">\n      <h4>\u4f7f\u7528\u89c4\u8303<\/h4>\n      <ul>\n        <li>\u5206\u5c42\u89c4\u8303\u7ba1\u7406\u77e2\u91cf\uff0c\u7981\u6b62\u6240\u6709\u56fe\u5143\u653e0\u5c42\uff1b<\/li>\n        <li>\u91cd\u590d\u96f6\u4ef6\u7edf\u4e00\u5efa\u5757\uff0c\u51cf\u5c11\u5197\u4f59\u591a\u6bb5\u7ebf\uff1b<\/li>\n        <li>\u6d4b\u7ed8\u6d77\u91cf\u70b9\u77e2\u91cf\u505a\u7b80\u5316\uff0c\u63d0\u5347\u8fd0\u884c\u901f\u5ea6\uff1b<\/li>\n      <\/ul>\n    <\/div>\n  <\/div>\n<\/div>\n\n<!-- \u5b8c\u6574\u82f1\u6587\u5185\u5bb9 -->\n<div class=\"lang-block\" id=\"en-content\">\n  <div class=\"hero\">\n    <h2>Full Guide to Vector Data in CAD Field<\/h2>\n    <div class=\"desc-sub\">Definition, mathematical storage, geometry entity, vector vs raster, file formats, engineering advantages, raster-to-vector workflow<\/div>\n  <\/div>\n\n  <div class=\"toc-box\">\n    <h3>Table of Contents<\/h3>\n    <ol>\n      <li><a href=\"#e1\">1 Core Definition of CAD Vector Data<\/a><\/li>\n      <li><a href=\"#e2\">2 Underlying Mathematical Storage Logic<\/a><\/li>\n      <li><a href=\"#e3\">3 Standard 2D &#038; 3D CAD Vector Entities<\/a><\/li>\n      <li><a href=\"#e4\">4 Vector VS Raster Drawing Comparison<\/a><\/li>\n      <li><a href=\"#e5\">5 CAD Vector Management: Layers \/ Blocks \/ Attributes<\/a><\/li>\n      <li><a href=\"#e6\">7 Main CAD Vector File Formats DWG\/DXF<\/a><\/li>\n      <li><a href=\"#e7\">7 Core Engineering Advantages of Vector<\/a><\/li>\n      <li><a href=\"#e8\">8 Raster-to-Vector Conversion Scenarios<\/a><\/li>\n      <li><a href=\"#e9\">9 Limitations &#038; Best Practices<\/a><\/li>\n    <\/ol>\n  <\/div>\n\n  <h2 id=\"e1\">1 Core Definition of CAD Vector Data<\/h2>\n  <div class=\"card\">\n    <h4>Plain Explanation<\/h4>\n    <p><span class=\"tag-b\">CAD Vector Data<\/span> is the standard geometric data model for computer-aided design. Instead of pixel grids, it stores all drawing entities via coordinate values, mathematical formulas and parameters, which is the mandatory format for mechanical, architectural and civil engineering CAD drawings.<\/p>\n    <p>Analogy: Raster scanned images (JPG) are made of mosaic pixels and get blurry when zoomed; vector graphics are defined by mathematical equations, lines stay sharp at any zoom scale with unchanged precise dimensions.<\/p>\n    <p>Engineering essence: Dimension labeling, CNC machining, 3D printing and BIM modeling all rely on vector geometry, which provides accurate millimeter coordinate data.<\/p>\n  <\/div>\n  <div class=\"tip-box\">\n    <strong>Key Features:<\/strong> Infinite resolution, parametric editable, embedded engineering attributes, support precise geometric calculation.\n  <\/div>\n\n  <h2 id=\"e2\">2 Underlying Mathematical Storage Logic<\/h2>\n  <div class=\"card\">\n    <p>CAD does not store pixel colors, only geometric parameters. Typical entity examples:<\/p>\n    <ul>\n      <li>Line: Start(X1,Y1), End(X2,Y2), linetype, lineweight, layer;<\/li>\n      <li>Circle: Center(X0,Y0), radius R, fill\/outline, color;<\/li>\n      <li>NURBS Spline: Control points, weight, degree (core for surface modeling).<\/li>\n    <\/ul>\n    <p>Render rule: When zooming viewport, GPU recalculates lines by formulas instantly, no jagged pixels, dimension precision remains consistent.<\/p>\n  <\/div>\n<pre class=\"code\">\n# Pseudocode for CAD circle vector storage\n{\n  type: \"circle\",\n  center: [100.0, 200.0],\n  radius: 50.5,\n  layer: \"center_line\",\n  linetype: \"center\",\n  color_index: 4\n}\n<\/pre>\n\n  <h2 id=\"e3\">3 Standard 2D &#038; 3D CAD Vector Entities<\/h2>\n  <div class=\"cmd-grid\">\n    <div class=\"cmd-card\">\n      <h4>Basic 2D Entities<\/h4>\n      <div class=\"desc\">Line, Arc, Circle, Polyline, Spline, Hatch, Text, Dimension<\/div>\n    <\/div>\n    <div class=\"cmd-card\">\n      <h4>Composite 2D Blocks<\/h4>\n      <div class=\"desc\">Reusable groups: doors, windows, standard bolts, edit once update all instances<\/div>\n    <\/div>\n    <div class=\"cmd-card\">\n      <h4>3D NURBS Surface<\/h4>\n      <div class=\"desc\">Free-form curved surfaces for automotive &#038; mold design<\/div>\n    <\/div>\n    <div class=\"cmd-card\">\n      <h4>3D Solid Vector<\/h4>\n      <div class=\"desc\">Box, cylinder, extrude\/revolve solids, calculate volume &#038; mass<\/div>\n    <\/div>\n  <\/div>\n  <div class=\"tip-box warn\">\n    <strong>Industry Note:<\/strong> Polyline is the most widely used vector, integrated continuous contour for offset &#038; boundary generation.\n  <\/div>\n\n  <h2 id=\"e4\">4 Vector VS Raster Drawing Comparison<\/h2>\n  <div class=\"compare-wrap\">\n    <div class=\"compare-item good\">\n      <h4>CAD Vector (DWG\/DXF)<\/h4>\n      <ul>\n        <li>Stored by coordinates &#038; math, sharp at any zoom<\/li>\n        <li>Single line selectable &#038; editable separately<\/li>\n        <li>Built-in length\/area for machining calculation<\/li>\n        <li>Layer-based visibility control<\/li>\n        <li>Direct import for CNC &#038; 3D printing<\/li>\n      <\/ul>\n    <\/div>\n    <div class=\"compare-item bad\">\n      <h4>Raster Bitmap (JPG\/TIF Scan)<\/h4>\n      <ul>\n        <li>Pixel grid, jagged after scaling<\/li>\n        <li>Whole image as one unit, no separate line editing<\/li>\n        <li>No geometric data for automatic measurement<\/li>\n        <li>No layer classification to hide components<\/li>\n        <li>Only reference, cannot be used for production<\/li>\n      <\/ul>\n    <\/div>\n  <\/div>\n  <div class=\"table-box\">\n    <table>\n      <thead>\n        <tr>\n          <th>Dimension<\/th>\n          <th>Vector Data<\/th>\n          <th>Raster Bitmap<\/th>\n        <\/tr>\n      <\/thead>\n      <tbody>\n        <tr>\n          <td>Storage Method<\/td>\n          <td>Coordinate &#038; mathematical params<\/td>\n          <td>RGB pixel matrix<\/td>\n        <\/tr>\n        <tr>\n          <td>Scaling Effect<\/td>\n          <td>Lossless, infinitely clear<\/td>\n          <td>Blurry with jagged edges<\/td>\n        <\/tr>\n        <tr>\n          <td>Edit Granularity<\/td>\n          <td>Single geometry editable<\/td>\n          <td>Entire image locked<\/td>\n        <\/tr>\n        <tr>\n          <td>Production Usability<\/td>\n          <td>Plot, CNC, BIM calculation supported<\/td>\n          <td>Reference only, not manufacturable<\/td>\n        <\/tr>\n        <tr>\n          <td>File Size<\/td>\n          <td>Small for complex drawings<\/td>\n          <td>Huge for high-res scans<\/td>\n        <\/tr>\n      <\/tbody>\n  <\/div>\n\n  <h2 id=\"e5\">5 CAD Vector Management: Layers \/ Blocks \/ Attributes<\/h2>\n  <div class=\"card\">\n    <h3>1. Layers<\/h3>\n    <p>Classification container for vectors. Mechanical drawings split into outline, center line, dimension; architecture split into wall, window, axis. Layers can be on\/off, frozen, locked to hide irrelevant geometry.<\/p>\n    <h3>2. Blocks<\/h3>\n    <p>Combined reusable vector groups (bolts, windows). Modify block definition, all inserted copies update synchronously to reduce redundant data.<\/p>\n    <h3>3. Attributes<\/h3>\n    <p>Text parameters attached to vector: part ID, thickness, material, exportable for BOM list.<\/p>\n  <\/div>\n\n  <h2 id=\"e6\">6 Main CAD Vector File Formats<\/h2>\n  <div class=\"cmd-grid\">\n    <div class=\"cmd-card\">\n      <h4>DWG<\/h4>\n      <div class=\"desc\">AutoCAD native binary vector format, full support layers, blocks, 3D solids, industry source file standard<\/div>\n    <\/div>\n    <div class=\"cmd-card\">\n      <h4>DXF<\/h4>\n      <div class=\"desc\">Open ASCII exchange format, compatible with all CAD\/CAM\/GIS software for cross-platform drawing transfer<\/div>\n    <\/div>\n    <div class=\"cmd-card\">\n      <h4>DWF\/DWFX<\/h4>\n      <div class=\"desc\">Lightweight read-only vector for drawing review &#038; distribution<\/div>\n    <\/div>\n    <div class=\"cmd-card\">\n      <h4>STEP \/ IGES<\/h4>\n      <div class=\"desc\">3D vector exchange for mold &#038; mechanical model cross-software collaboration<\/div>\n    <\/div>\n  <\/div>\n\n  <h2 id=\"e7\">7 Core Engineering Advantages of Vector<\/h2>\n  <ol class=\"step-list\">\n    <li>Zero precision loss: accurate mm dimensions at any print\/zoom scale;<\/li>\n    <li>Flexible editing: drag vertices\/lines without redrawing whole drawing;<\/li>\n    <li>Auto geometry calculation: perimeter, area, volume, centroid;<\/li>\n    <li>Layer control to simplify complex master drawings;<\/li>\n    <li>Direct compatibility with CNC, 3D print, BIM platforms;<\/li>\n    <li>Efficient reuse via blocks to cut redundant geometry.<\/li>\n  <\/ol>\n\n  <h2 id=\"e8\">8 Raster-to-Vector Conversion Use Cases<\/h2>\n  <div class=\"card\">\n    <p>Rasterization = convert scanned blueprint\/image into editable CAD vector:<\/p>\n    <ul>\n      <li>Digitize old paper scanned blueprints into vector drawings;<\/li>\n      <li>Convert aerial LiDAR point cloud to contour line vectors;<\/li>\n      <li>Extract lines from scanned PDF engineering drawings for redesign;<\/li>\n      <li>Turn hand-drawn decoration sketches into construction CAD.<\/li>\n    <\/ul>\n  <\/div>\n  <div class=\"info-box warn\">\n    <strong>Note:<\/strong> Auto vectorization generates broken lines &#038; overlaps, manual vertex cleanup required.\n  <\/div>\n\n  <h2 id=\"e9\">9 Limitations &#038; CAD Best Practices<\/h2>\n  <div class=\"compare-wrap\">\n    <div class=\"compare-item bad\">\n      <h4>Vector Limitations<\/h4>\n      <ul>\n        <li>Cannot express real-world textures, needs raster attachments;<\/li>\n        <li>Millions of tiny vectors cause CAD lag;<\/li>\n        <li>Simple screenshots converted to vector waste storage;<\/li>\n      <\/ul>\n    <\/div>\n    <div class=\"compare-item good\">\n      <h4>Standard Workflow Rules<\/h4>\n      <ul>\n        <li>Classify vectors by layers, avoid putting all on layer 0;<\/li>\n        <li>Create blocks for repeated parts to reduce polyline redundancy;<\/li>\n        <li>Simplify massive survey point vectors to boost performance;<\/li>\n      <\/ul>\n    <\/div>\n  <\/div>\n<\/div>\n<\/main>\n<footer>\n  <p>CAD Vector Data Tutorial | Unified UI Layout &#038; Style<\/p>\n<\/footer>\n\n<script>\nfunction switchLang(lang){\n  document.querySelectorAll('.lang-block').forEach(el=>el.classList.remove('active'));\n  document.getElementById(lang+'-content').classList.add('active');\n  document.querySelectorAll('.lang-switch button').forEach(btn=>btn.classList.remove('active'));\n  document.getElementById('btn-'+lang).classList.add('active');\n  document.documentElement.lang = lang === 'zh' ? 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