如何创建USDZ文件？ [英] How to create a USDZ file?

问题描述

我试图在 http://graphics.pixar.com上查看主要文档。 /usd/docs/index.html 和 http： //graphics.pixar.com/usd/docs/Usdz-File-Format-Specification.html ，但找不到创建 usdz 文件的详细信息。

I tried to look at the main documentation at http://graphics.pixar.com/usd/docs/index.html and http://graphics.pixar.com/usd/docs/Usdz-File-Format-Specification.html but could not find the details to create a usdz file.

我可以从 http://graphics.pixar.com/usd/downloads.html

我们如何创建一个？

推荐答案

Apple在以下网址提供了usdz文件库

A gallery of usdz files are provided by Apple at the url below

https://developer.apple.com/arkit/gallery/

您需要安装有iOS12 beta的设备，才能在移动设备上查看这些模型。基本上，Apple使用Mime类型的model / usd usdz和model / und.pixar.usd.usdz将它们标识为AR可见。您还需要通过safari浏览器执行此操作... Chrome不支持文件格式。

You need a device with iOS12 beta installed for the models to be viewable on your mobile device. Basically Apple uses Mime-types model/usd usdz and model/und.pixar.usd .usdz to identify them as AR viewable. You also need to do this via the safari browser... Chrome does not support the file format.

列出缩略图usdz文件的html如下。

the html to list a thumbnail usdz file would be the following.

<a rel="ar" href="model.usdz">
  <img src="model-preview.jpg">
</a>

为了创建自己的usdz文件，Apple捆绑了usdz_converter作为Xcode 10的一部分。它是命令行从OBJ文件，单帧Alembic（ABC）文件，USD文件（.usda或usd.c）创建usdz文件的工具

to create your own usdz files, Apple has bundled usdz_converter as part of Xcode 10. Its a command line tool for creating the usdz file from OBJ files, Single-frame Alembic (ABC) files, USD file (either .usda or usd.c)

基本命令行是

xcrun usdz_converter Wineglass.obj Wineglass.usdz  

usdz支持基于物理的渲染，要实现此目的，您需要像这样为PBR的每个组件添加图像，

usdz supports physically based renders, to achieve this you add images for each component of the PBR like so,

xcrun usdz_converter Wineglass.obj Wineglass.usdz 
-g WineGlassMesh
-color_map WineGlass_Albedo.png
-metallic_map WineGlass_Metallic.png
-roughness_map WineGlass_Roughness.png
-normal_map .  WineGlass_Normal.png
-emissive_map  WineGlass_Emissive.png

一个不错的视频，让您开始如何创建usdz文件，并将其托管在网页&在自己的应用中创建快速查看

A good video to get you started on how to create usdz files, host on a webpage & create a quicklook in your own app

https://developer.apple.com/videos/play/wwdc2018/603/

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