Ok so stl here is not standard template library. I was very confused for a minute.

A nice feature to add could be a synchronized transform: when rotating one viewport the other two rotate along (optional).

Looks handy. Feature suggestion: locked views so all three viewports rotate together.

Very cool work! Nice job. Road-map looks good too! I always appreciate client/local-first emphasis. I have been seeing a lot of great in-browser apps coming out via 3js,wasm,etc (THANK YOU LLMs)

With interest in this space you may be interested to check out:

- That Open Company in the BIM industry (not personally affiliated, but admirer). - Fovea ArchVision (also not directly affiliated, but can attest that the team are great people.)

Yo this would be cool to have embedded as a PR trigger on GitHub for 3d files

And maybe as a preview option between branches ?

This is pretty cool, and seems to be useful in order to compare various "3D model" generators that are around, would make the comparison a bit easier to make.

Given it runs client-side, could you potentially offer like a CLI as well, or something we could integrate with other things / CI? That'd be a really nifty way of generating these diffs for later inspection.

- Multi group objs are ignored, I only see first group.

- When uploading same file twice, you should warn about it like meld does (meld says: File /home/foo/Downloads/D_LED_3mm.obj is being compared to itself)

Wow! This looks really cool! Looking forward to playing more with this?

Wow, just needed something like this literally yesterday, thanks OP.

Should be "Show HN"