# SU·CAD Pro — Complete Engineering & Commercial Knowledge Corpus (v3.88.91)

Official Extension Name: Continuous DXF Exporter
Version: 3.88.91 (2026-11-01)
Supported Host: SketchUp 2017 – 2026+ (Qt6 Ready)
Supported CAD Targets: AutoCAD 2000 – 2026+ (0 Errors), BricsCAD, ZWCAD, GstarCAD
Operating System: Windows 10 / 11 x64
Deployment Format: Single self-contained offline `.rbz` archive (zero external Python or PDF printer setup required)

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## 1. Workflow Benchmark: SU·CAD Pro vs SketchUp Native DXF vs SketchUp LayOut

| Dimension | SketchUp Native DXF | SketchUp + LayOut | SU·CAD Pro (v3.88.91) |
| :--- | :--- | :--- | :--- |
| Polyline Continuity & True Arcs | Thousands of broken segments; arcs faceted into polygons | Frequent duplicate overlapping viewport strokes in DWG | **100% closed LWPOLYLINE + 2-vertex Bulge true arcs; zero shatter on EXPLODE** |
| High-Poly Furniture Performance | Freezes for minutes; outputs dense black mesh blobs | Severe viewport lag & beachballing on multi-page files | **0.2s hybrid HLR + instant 3-view 2D CAD Block Proxy Bypass** |
| Section Cut Native Hatching | None (hollow unclosed cut edges only) | Raster/pattern fills that fail to export as editable AcDbHatch | **Watertight loop stitching + 35+ native AcDbHatch (1:1 Viewport/DXF/PDF)** |
| Dimensions, Elevations & Leaders | Basic 3D text unsuitable for construction standards | Capable, but disconnected from 3D edits and slow to refresh | **In-viewport drafting: 2.5mm scale-healing text, crosshair clearance & multi-leaders** |
| Detail Callouts & Sheet Packing | Requires destructive model slicing | Stacking multiple cropped viewports tanks performance | **Non-destructive quad mask + 0.000mm hard clip + automated 2D multi-scale packing** |
| True Lineweights (LWT) & CTB | No print lineweight hierarchy | Requires separate manual tag override setup | **Real-time viewport LWT rendering + native AutoCAD .ctb plot style import** |
| Multi-Page Vector PDF & Index | Requires external PDF printer drivers | Slow batch export on heavy sets | **Zero-dependency pure Ruby Vector/Hybrid PDF + A0–A4 titleblocks & auto index** |

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## 2. Standard Architectural CAD Layer & Lineweight Topology

| Layer | Lineweight | ACI / Color | Architectural Rule |
| :--- | :--- | :--- | :--- |
| `0` | 0.25 mm | ByBlock (0) | CAD 块内部基础图元，随宿主组件图层动态继承变色，彻底消灭垃圾图层 |
| `SECTION_CUT` | 0.50 mm | ACI 7 (白/黑) | 剖切截面外轮廓加粗实线，100% 拓扑缝合闭合连续 LWPOLYLINE |
| `SECTION_HATCH` | 0.15 mm | ACI 8 / TrueColor | 原生可编辑 AcDbHatch 截面图案填充，35+ 材质自动映射与三端同构 |
| `SECTION_TITLE` | 0.25 mm | ACI 7 / 8 | 剖面图名标注与符合 GB/T 50104 规范的双下划线详图标线 |
| `SU_PROFILE_LINES` | 0.35 mm | ByLayer | 三维体量视口外轮廓特征剪影线 (Profiles)，强化空间层次感 |
| `SU_VISIBLE_LINES` | 0.25 mm | ByLayer / RGB | 消隐后可见投影结构边线，支持按图层着色或写实材质真彩色 |
| `DIM-PM-auto / LM-auto` | 0.18 mm | ACI 38 (#7F5F00) | 平面/立面工程尺寸线与 45° 建筑起止符，随视角正交自动互斥显隐 |
| `DIM-TEXT-PM / LM-auto` | 0.25 mm | ACI 2 (#EAB308) | 尺寸数值与国标标高文字独立层，边线平滑防糊黑，恒定 2.5mm 纸面字高 |
| `DIM-LEADER-*-auto` | 0.18 mm | ACI 2 / BYLAYER | 多联引线父组与平行基准线，导出原生 CAD 块与 MTEXT 多行文本 |
| `DIM-LEADER-*-ARROW-auto` | 0.18 mm | ACI 1 (#EF4444) | 引线实心箭头独立图层，支持在 CAD 图层管理器内一键全图改色或冻结 |

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## 3. Commercial Licensing Tiers

### China Region (CNY / 人民币黄金定价)
- **社区试用版**: ¥0 免费下载 (单机免注册体验) — 免注册直接下载离线 .rbz 安装包，在您自己的模型中实测消隐速度与双浮标探针。
- **月度专业版**: ¥79 / 月 (1 台设备商业授权) — 适合短期紧急投标或单项目施工图深化突击，全量解锁专业双擎导出能力。
- **年度旗舰版**: ¥499 / 年 (2 台设备同绑 (台式+笔电)) — 独立设计师与深化主力首选。全场景批量出图、节点大样拼版与纯矢量图册全解锁。
- **终身商业买断版**: ¥1,280 / 终身 (2 台设备永久商业授权) — 告别年费续订焦虑，一次买断永久拥有商业授权，并限时锁定未来两大独立新产品永久授权。
- **企业团队版**: ¥2,599 / 5 席位 (5 台机器独立永久授权) — 专为甲级设计院与全案深化团队打造，统一全团队 CAD 图层、CTB 线规与企业图签标准。

### Global Region (USD / International Pricing)
- **Community Trial**: $0 Free Download (1 Machine Evaluation) — Zero sign-up required. Download the self-contained .rbz installer and benchmark HLR speed on your own SketchUp models.
- **Monthly Pro**: $19 / month (1 Device Activation) — Ideal for urgent architectural deadlines and short-term construction documentation sprints.
- **Annual Flagship**: $99 / year (2 Devices (Desktop + Laptop)) — Built for full-time architects, interior designers & millwork drafters replacing laggy LayOut workflows.
- **Lifetime Commercial**: $249 one-time (2 Devices Perpetual License) — Zero recurring subscriptions. Own a perpetual license plus free licenses to 2 upcoming standalone flagship editions.
- **Studio & Enterprise**: $599 / 5 seats (5 Independent Workstations) — Standardize CAD layer topologies, CTB plot styles, and custom titleblocks across your entire design studio.

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## 4. Recent Engineering Milestones
### v3.88.91 (2026-11-01) — 填充三端 1:1 数值疏密完全同构、大样幂律阻尼缩放与纯白底真彩 PDF 直出
- 实现 SU 视口、AutoCAD AcDbHatch 与矢量 PDF 填充图案 1:1 数值、疏密与方向完全同构，自动同步合规 .pat 至 CAD Support 根治改比例报错
- 独创节点大样非线性幂律阻尼自适应填充缩放（1:100 至 1:10 疏密优雅均衡），切回母图 100% 无损还原
- 快改比例解耦回归 1.0 直观基准，矢量 PDF 支持纯白纸底与 24-bit 真彩色同构直出

### v3.88.88 (2026-10-26) — 大样视口 · DXF · PDF 0.000mm 几何同构与剖切保留侧标注钳位穿透
- 攻克带孔填充、块内填充逆变换硬裁切与拼版展开精度，实现大样三端 0.000mm 严丝合缝同构
- 剖切开启时标注自动钳位至保留侧内并前向投影预览，排版工具支持单击直接穿透点选
- 跨场景独显门禁升级，100% 免疫系统级“撤销全部隐藏”误穿透，正常材质模式强制保持标注静音

### v3.88.85 (2026-10-18) — 平立面母图与大样标注动态比例 3D 自愈重构 & 空间净空双向十字测量
- 切换任意出图比例尺时全图 3D 尺寸与起止符自动重构，恒定保持纸面 2.5mm 标准字高且母图与大样双向隔离
- 新增 SmartClearance 空间净空正交双向十字一键自动测量，自动动态避让交叉文字
- 全景包围盒紧凑垫优化，最大化 PDF 与图框 Fit 空间利用率

### v3.88.61 (2026-10-05) — 企业施工图签套件、多大样二维自动网格拼版与多页目录书签 PDF 成册发布
- 内置 5 套企业工程图签模板与宏变量自动注水，支持全场景一键批量装订
- 跨场景多比例大样自动二维网格拼版流转，自动构造符合 GB/T 50104 规范的详图圆标
- 自动生成多页连续编号《图纸目录索引表》并注入 PDF /Outlines 书签大纲

### v3.88.48 (2026-09-20) — 独立四维素材管理中心、建筑总成防透视消隐加固与焊接曲线 100% 物理保真
- 解耦材质 / 填充 / CAD图块 / 75项二元词库四大管理中心，支持 128px 真实纹理缩略图与拼音首字母秒查
- 天花吊顶与玻璃幕墙窄压顶（<=0.5 sq.in）精准准入实心遮挡库，彻底杜绝龙骨 X 光透视
- 保护用户焊接多段线与正多边形物理直线特征，仅对真圆弧执行数学自适应细分

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## 5. Frequently Asked Questions (Bilingual)
Q: 安装 SU·CAD Pro 需要我自己去安装配置 Python 环境或第三方软件吗？
A: 完全不需要！官方 .rbz 安装包内已完整封装便携式几何计算环境与零依赖纯 Ruby 矢量 PDF 引擎。即使在完全断网的设计院内网电脑上，只需在 SketchUp 扩展程序管理器中点击“安装扩展程序”选中 .rbz 即可一键启用。

Q: 支持哪些 SketchUp 和 AutoCAD 版本？最新的 SketchUp 2026 可以用吗？
A: 全面兼容 Windows 10/11 64 位系统下的 SketchUp 2017 至 2026+ 全系列版本（已针对 SketchUp 2026 全新 Qt6 底层架构完成虚线与无边框 HUD 深度适配）。导出的 DXF 完美兼容 AutoCAD 2000–2026、浩辰 CAD、中望 CAD 等主流平台，打开 0 错误、0 警告。

Q: 导出的多段线在 AutoCAD 里执行 EXPLODE (炸开) 会变成碎线吗？
A: 绝对不会。SU·CAD Pro 严格执行闭合 LWPOLYLINE 拓扑焊接与 Uniform Scale 等比块缩放保护（自动打平非等比剪切装配体），在 CAD 中即使多层炸开依然保持 100% 连续多段线与真实圆弧属性。

Q: 年度旗舰版和终身商业买断版支持同时在公司台式机和家里笔记本上用吗？
A: 支持！年度旗舰版（¥499/年）与终身商业买断版（¥1,280）均标配 2 台设备同时激活席位（台式机 + 笔记本无需反复顶号）。换新电脑时可在插件内置【个人中心 -> 设备管理】一键自主解绑换机。

Q: 社区试用版（¥0）和付费商业版有什么区别？
A: 社区试用版免注册即可下载安装，开放当前活动视口基础 DXF 导出、单张带水印矢量 PDF 预览以及 4K 双浮标探针与工具箱体验，方便您在真实复杂项目上检验消隐速度；升级商业版即可全量解锁 1:1 绝对闭合多段线、35+ 原生 AcDbHatch 填充、高模图块旁路、多场景批量导出、节点大样拼版与纯净无水印多页图册。

Q: 支持开具企业增值税专用发票或对公转账采购吗？
A: 完全支持。个人与工作室购买年度版/终身版可申请电子普通发票；采购企业团队版（¥2,599 / 5 席位买断）支持签订采购合同、对公银行转账及开具增值税专用发票，并提供企业专属图签规范接入支持。

Q: Do I need to install Python or any external PDF printer drivers?
A: Zero external setup is required. The official .rbz archive bundles a self-contained portable geometry runtime plus a pure-Ruby zero-dependency 2D Vector PDF engine. Install via SketchUp Extension Manager even on completely offline air-gapped workstations.

Q: Which versions of SketchUp and AutoCAD are supported? Is SketchUp 2026 supported?
A: SU·CAD Pro supports SketchUp 2017 through 2026+ on Windows 10/11 x64, including full native compatibility with SketchUp 2026’s Qt6 architecture. Exported DXF files open with 0 errors and 0 warnings in AutoCAD 2000–2026+, BricsCAD, ZWCAD, and GstarCAD.

Q: Will polylines shatter into tiny segments if I run EXPLODE in AutoCAD?
A: Never. SU·CAD Pro welds closed loops into continuous LWPOLYLINE entities and enforces Uniform Scale across nested block references (flattening sheared assemblies automatically), so geometry stays 100% continuous even after EXPLODE.

Q: Can I use one license on both my office desktop and personal laptop?
A: Yes! Both the Annual Flagship ($99/yr) and Lifetime Commercial ($249) plans include 2 simultaneous device activations (Desktop + Laptop) plus instant self-service machine unbinding inside the in-plugin User Center.

Q: What is included in the $0 Community Trial?
A: You can download the .rbz immediately without registering a credit card. It unlocks baseline active-viewport DXF export, watermarked single-page Vector PDF export, and the 4K Dual-Beacon HUD & Pro Glass Toolbox so you can verify HLR speed on your heaviest models before upgrading.

Q: Do you provide commercial tax invoices and multi-seat studio onboarding?
A: Yes. Commercial invoices are provided for all paid plans, and the Studio 5-Seat Perpetual Pack ($599) includes independent seat keys, custom studio titleblock configuration, and air-gapped team deployment support.

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## 6. Full Guide Summaries
### How to Fix Broken Lines & Faceted Arcs When Exporting SketchUp to AutoCAD DXF
Keywords: SketchUp broken lines DXF, SketchUp faceted arcs to AutoCAD, closed LWPOLYLINE SketchUp, Bulge arc DXF
Summary: Why native SketchUp DXF export shatters curves into thousands of segments—and how topological welding, 2-vertex Bulge arc fitting, and Uniform Scale Layer 0 blocks deliver clean CAD drawings.
Takeaways:
- Closed loops are topologically welded into 100% continuous LWPOLYLINE entities (<0.01mm gap snap)
- Kåsa circle fitting reconstructs true 2-vertex Bulge CAD arcs ready for native DIMRADIUS dimensioning
- Nested components map cleanly to Layer 0 (ByBlock) with Uniform Scale so EXPLODE never fragments geometry

### The High-Speed SketchUp LayOut Alternative: Full Construction Sets Directly from Viewport
Keywords: SketchUp LayOut alternative, SketchUp construction drawings without LayOut, SketchUp vector PDF exporter
Summary: Tired of 15-second viewport beachballs in LayOut? Discover how single-model in-viewport dimensions, native hatches, detail callouts, and pure Vector PDF booklets replace dual-app friction.
Takeaways:
- Keep 3D modeling, dimensions, elevations, multi-leaders, and detail callouts inside a single .skp file
- Switch between Shaded design mode (annotations auto-muted) and CAD Hidden-Line modes in <5ms
- Publish multi-page A0–A4 Vector PDF sets with automated drawing indexes and bookmarks alongside clean DXF

### Eliminate High-Poly Furniture Lag: 3-View CAD Block Proxy Bypass Explained
Keywords: SketchUp high poly furniture CAD export, SketchUp 2D CAD proxy block, fast SketchUp HLR export
Summary: Keep photorealistic 3D sofas and fixtures for rendering while exporting crisp, lightweight 2D architectural CAD symbols in milliseconds.
Takeaways:
- Bind Plan (-xy), Front, and Side 2D CAD blocks to any high-poly 3D component via the Asset Hub
- Orthographic exports bypass 100k-triangle mesh intersections completely, outputting clean CAD blocks in <1ms
- Perspective cameras automatically disable 2D proxies and revert to true 3D silhouette HLR

### Generating Editable Native AutoCAD AcDbHatch Section Fills with 1:1 Scale Isomorphism
Keywords: SketchUp native AutoCAD hatch, AcDbHatch SketchUp section cut, Skalp alternative SketchUp 2026
Summary: How automatic section loop stitching, inner hole detection, and 35+ semantic .PAT mappings create identical hatches across SketchUp, AutoCAD DXF, and Vector PDF.
Takeaways:
- Stitches raw section cut segments into closed outer rings and inner openings automatically
- Maps 35+ architectural materials/tags to editable AcDbHatch entities and syncs custom .pat files to AutoCAD Support
- Guarantees 1:1 numeric scale, density, rotation, and TrueColor parity across Viewport, DXF, and PDF

### 0.000mm Detail Callout Masking, Power-Law Hatch Scaling & Multi-Scale Sheet Packing
Keywords: SketchUp detail callout plugin, multi-scale CAD sheet packing, construction detail masking SketchUp
Summary: Create 1:10 and 1:25 construction details non-destructively from your master model with exact boundary clipping and automated 2D A-series sheet layout.
Takeaways:
- Drag a callout frame to generate an isolated orthographic [Detail] scene without duplicating or slicing your model
- Liang-Barsky & Sutherland-Hodgman hard clipping guarantees 0.000mm parity across Viewport, DXF, and PDF
- Non-linear power-law hatch damping prevents dense black hatch blobs at 1:10–1:25 while preserving master scene scales

### SketchUp 2026 (Qt6) Live Lineweights (LWT), Dash Calibration & AutoCAD .CTB Import Guide
Keywords: SketchUp 2026 DXF plugin, SketchUp live lineweight LWT, import AutoCAD CTB into SketchUp
Summary: Full compatibility guide for SketchUp 2026’s Qt6 UI architecture, real-time viewport print lineweights, and studio .ctb plot style synchronization.
Takeaways:
- Purpose-built for SketchUp 2026 Qt6 frameless HUD alignment and idempotent dashed-line state calibration
- Parses binary AutoCAD .ctb files across all 255 ACI colors with 0.05mm precision
- Embeds 21 metric acadiso.lin linetypes with $INSUNITS=4 and $LWDISPLAY=1 pre-activated