How to author a Reality File?

Question

How do we author a Reality File like the ones under "Examples with animations" at https://developer.apple.com/augmented-reality/quick-look/ ??

For example, "The Hab" : https://developer.apple.com/augmented-reality/quick-look/models/hab/hab_en.reality

Tapping on various buttons in this experience triggers various complex animations. I don't see any way to accomplish this in Reality Composer.

And I don't see any way to export/compile to a "reality file" from within Xcode.

How can I use multiple animations within a single GLTF file? How can I set up multiple "tap target" on a single object, where each one triggers a different action?

How do we author something similar? What tools do we use?

Answer 1

It's possible!

You should create series of animations in Maya, save them as .usdz files, load those animations into Reality Composer 1.5, apply the desired behaviors to them, and export a scene as .reality file.

How to...

To switch one .usdz animation to another one with a simple tap, use the following approach.

Create two .usdz files with animated red sphere in Maya. First file must contain a sphere moving along +X axis, and a second file must contain the same sphere moving along +Y axis (with X axis offset). Not a single line of Swift code required.

In Reality Composer create 2 empty scenes and import first .usdz file into first scene, then second .usdz file – into second one. After that, apply the appropriate behaviors accordingly.

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