XRPackage Overview

XRPackage turns 3D apps into a file you can load anywhere.

It uses standards like WebGL, WebXR, GLTF, and WebBundle to package an app into a .wbn file.

What's in a package?

An XRPackage is a bundle of files. The entry point is a manifest.json (following the Web App Manifest standard). The rest of the files in the bundle are the source files for the app.

$ cat manifest.json
{
  "name": "cube",
  "description": "Cube XRPackage",
  "start_url": "index.js"
}

The start_url field depends on the type of package:

1. Asset packages

   For the following types of packages, the start_url references the single static asset file to be loaded:

   • glb@0.0.1
   • vrm@0.0.1
   • vox@0.0.1

2) WebXR packages

For WebXR packages, the start_url references the index.js entry point for the app. index.js should have any assets referenced using relative paths.

Package configuration

The package manifest contains fields to describe aspects of your XRPackage such as name, description, etc.

See Manifest API for more details on these properties.

Building a package

Regardless of package type, packages are built with the xrpk tool which you can get on npm:

$ npm install -g xrpk

To build a package with manifest.json in the current directory:

$ xrpk build .
cube.wbn

The resulting package is cube.wbn.

There is also a GUI. See Create An XRPackage for more info on how to create an XRPackage.

Design Guidelines:

• Use transparent skyboxes to make it easier to compose multiple apps together.
• Be mindful of size to improve loading speeds, keep packages under 100mb.

See Design Guidelines for more.