[Feature] USDZ and USD loader using TinyUSDZ

[syoyo]

Description

I'd like to share the status of TinyUSDZLoader for three.js, Its a USD loader module in wasm.

https://x.com/syoyo/status/1825270359211548719

https://github.com/lighttransport/tinyusdz/tree/dev/sandbox/threejs

Current status

A mesh with a texture possible.

Advantage

• (Mostly) Full-featured USDZ support(both supports USDA Ascii and USDC binary) possible. On the contrary, current USDZLoader.js in three.js https://github.com/mrdoob/three.js/blob/dev/examples/jsm/loaders/USDZLoader.js is limited to USDA only.
• Better material/texture support(e.g. loading broader EXR image format possible thanks to TinyEXR(embedded in TinyUSDZ module)
• Portable. No need of SharedArrayBuffers and Atomics(whose are requirement of wasm build of OpenUSD)

Disadvantage

• Larger WASM size. Roughly 2MB uncompressed, 600kb when compressed.

We still need to implement more stuffs(scene graphs, better reconstruction of material/texture suited for three.js), skinning/animations, etc. But I hope USDZLoader based on TinyUSDZ is the promising way to load USD/USDZ in three.js.

Solution

N/A

Alternatives

N/A

Additional context

No response