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Docs · Specs · D-09 P0 · v0.1文档 · 规格 · D-09 P0 · v0.1

USD output specificationUSD 输出规格

This document defines how MDCX publishes and accepts OpenUSD (typically .usdc) reference designs for modular AI data center containers. It is the first normative engineering spec in the Docs MVP — partners, factories, and future Designer exports should align to these rules. 本文定义 MDCX 如何发布与接收模块化 AI 数据中心集装箱的 OpenUSD(通常为 .usdc)参考设计。这是 Docs MVP 中第一份规范性工程规格——合作伙伴、工厂以及未来的设计器导出均应遵循这些规则。

Status: Public draft v0.1 · 2026-08-10 · Identity via solution code (D-11) · Presentation of 3D on the web follows MEDIA / D-12 (poster first; heavy USD is download-only).状态:公开草案 v0.1 · 2026-08-10 · 身份以方案代码为准(D-11) · 网页 3D 呈现遵循 MEDIA / D-12(先海报图;大体积 USD 仅供下载)。

1. Scope1. 适用范围

In scope:范围内:

Out of scope for v0.1:v0.1 范围外:

2. Identity binding2. 身份绑定

Every published USD package must map to exactly one solution code from the product matrix.每一个已发布的 USD 包必须唯一对应产品矩阵中的一个方案代码。

Alias别名SKU ID (code)SKU ID(代码)Public package (examples)公开包(示例)
L1240C45 L1240C45SUR150 L1240C45-1200KW.usdc.zip (legacy filename OK; prefer SKU in metadata)(沿用旧文件名可接受;建议在元数据中写入 SKU)
I400C45 I400C45SUT50 I400C45.usdc.xz
L1800C45DR220 (draft)(草稿) Reference geometry may exist as download; no full product page until Publish可提供参考几何下载;发布前开放完整产品页
L450C20DR150 (draft)(草稿) Same as above同上
Rule: Changing IT power, loop topology, UPS flag, size, or density creates a new SKU ID. Do not overwrite the meaning of an existing code. Archive old packages with a dated suffix if needed. 规则:变更 IT 功率、回路拓扑、UPS 标志、尺寸或密度,即产生新的 SKU ID。不得覆盖既有代码的含义。必要时以日期后缀归档旧包。

3. Units & coordinate system3. 单位与坐标系

Property属性Requirement要求
Linear units长度单位Meters (USD metersPerUnit = 1.0). Document any exception in package README.(USD metersPerUnit = 1.0)。任何例外须在包内 README 中说明。
Up axis上轴Y-up preferred for Omniverse / common DCC; if Z-up, set stage upAxis and document in metadata.为兼容 Omniverse / 常见 DCC,优先 Y 轴向上;若为 Z 轴向上,须设置 stage upAxis 并在元数据中说明。
OriginContainer exterior footprint: origin at floor plane, door-end centerline (or documented alternative). Include a World / Root xform that is identity at rest.以集装箱外轮廓为准:原点位于地面平面、门端中心线(或另行说明的替代位置)。须包含静止状态为单位矩阵的 World / Root xform。
Forward+Z out the long axis toward the far end (document if mirrored for a twin container).+Z 沿长轴指向远端(若为双箱镜像布置须说明)。
Scale1:1 real world. No “cm” meshes scaled 0.01 without correcting metersPerUnit.1:1 实尺。不得在未修正 metersPerUnit 的情况下使用缩放 0.01 的「厘米」网格。

4. Prim & asset naming4. Prim 与资产命名

Use ASCII identifiers; prefer PascalCase for Xforms and snake_case only for files on disk.使用 ASCII 标识符;Xform 优先 PascalCasesnake_case 仅用于磁盘文件名。

File names on the public CDN may retain legacy labels (L1240C45-1200KW.usdc) for continuity; the stage metadata must still carry the canonical SKU ID.公开 CDN 上的文件名可沿用旧标签(L1240C45-1200KW.usdc)以保持连续性;但 stage 元数据仍必须携带规范 SKU ID

5. LOD tiers5. LOD 层级

LODPurpose用途Guidance指引
LOD0 Marketing / web poster source市场 / 网页海报图来源 Simplified shell + major equipment silhouettes; safe for Sketchfab-class polycounts.简化外壳 + 主要设备轮廓;面数适配 Sketchfab 级别。
LOD1 Design coordination设计协同 Racks/tanks, CDU, busways, clearances; default public download when only one file is published.机柜/液舱、CDU、母线、检修间距;仅发布单一文件时的默认公开下载版本。
LOD2 Factory / detailed twin工厂 / 精细孪生 Optional private package; fasteners and non-critical clutter may be included. Not required on mdcx.org.可选的私有包;可包含紧固件等非关键细节。mdcx.org 上非必需。

If a single file is shipped, treat it as LOD1 and state that in the download caption.若仅交付单一文件,按 LOD1 处理,并在下载说明中注明。

6. Packaging & delivery6. 封装与交付

7. Export checklist7. 导出检查清单

Before publishing a package next to a product page or Docs link:在产品页或文档链接旁发布包之前:

8. Designer / TCO linkage (forward-looking)8. 设计器 / TCO 联动(前瞻)

When Designers export geometry or an asset manifest:当设计器导出几何或资产清单时:

9. Current public packages9. 当前公开包

Hosted under /assets/3D/ (see product pages for buttons):托管于 /assets/3D/(下载按钮见各产品页):

File文件Maps to对应Notes备注
L1240C45-1200KW.usdc.zipL1240C45 · L1240C45SUR150Primary liquid reference · UPS configuration液冷主参考模型 · 含 UPS 配置
L1240C45-2400KW-GEMINI.usdc.zip2× L1240C45 twin layout2× L1240C45 双箱布置Site arrangement example场地布置示例
DLC45-1800KW.usdc.xzL1800C45DR220 (draft)(草稿)Geometry reference · Coming soon product几何参考 · 即将推出的产品
DLC20-450KW.usdc.xzL450C20DR150 (draft)(草稿)Geometry reference · Coming soon product几何参考 · 即将推出的产品
I400C45.usdc.xzI400C45 · I400C45SUT50Immersion reference浸没液冷参考模型

10. Changelog10. 变更记录

Version版本Date日期Notes备注
0.12026-08-10Initial public draft: units, naming, LOD, packaging, checklist (D-09).首个公开草案:单位、命名、LOD、封装、检查清单(D-09)。
Normative companions:规范性配套文件: docs/PRODUCT-MATRIX.md · docs/rules/NAMING.md · docs/rules/MEDIA.md · docs/CLAIMS.md (numbers only — not geometry).(仅数字,不含几何)。 Questions:咨询: [email protected]