.spz support

[cyango]

As scanniverse released their open source new .spz which seems to bring new optimizations, is this library capable of supporting that .spz?

https://scaniverse.com/news/spz-gaussian-splat-open-source-file-format

[seppestaes]

Ongoing discussion #47

[mkkellogg]

I have a branch in development that supports the .spz format (up to 2nd degree spherical harmonics) as well as the updated PlayCanvas compression with spherical harmonics (also up to 2nd degree): https://github.com/mkkellogg/GaussianSplats3D/tree/playcanvas_and_spz_compression. Anyone want to test it out?

[seppestaes]

I did two tests with .spz files (playcanvas_and_spz_compression)
one .spz is 26.6Mb, the other 15.3Mb.

SplatGeometry.js:29 Uncaught RangeError: Array buffer allocation failed
at new ArrayBuffer ()
at new Uint32Array ()
at SplatGeometry.build (SplatGeometry.js:29:33)
at SplatMesh.build (SplatMesh.js:367:43)
at Viewer.addSplatBuffersToMesh (Viewer.js:1222:49)
at Viewer.js:1119:51
at Util.js:160:28

In SplatGeometry: maxSplatCount is 1439546489 and 1406516345
Seems weird as the splat is rather small.

https://drive.google.com/file/d/1UWOss522q90aZFU5FP5Xx5ebhyilJBbq/view?usp=sharing

[mkkellogg]

Can you share the code you used to view the scene? I'm able to view the scene you shared just fine, so one of your viewer settings may be the culprit:

[seppestaes]

Hi @mkkellogg,
I'm using the demo viewer (index.html). Added a block to FileBufferToSplatBuffer for the new SpzLoader. It's working nicely!

[cyango]

How much FPS are you getting? Does it load fast in mobile?

[KuoFengYuan]

Hi @mkkellogg,
I'm using the demo viewer open spz
but i use mobile phone safari open will crash
my url:
https://test.venraas.tw/demo.html?url=https://storage.googleapis.com/macaron_melody/will/1106_sofa.spz

[cyango]

I'm trying this on a RF3 component, but I'm having a error on import from that specific branch. Am i doing something wrong?

[seppestaes]

@cyango : Did you build the package?
"module": "build/gaussian-splats-3d.module.js", "main": "build/gaussian-splats-3d.umd.cjs",

[cyango]

Yes I missed that step. Working on my R3F app!

[cyango]

What's missing to merge that branch and publish to npm?

[mkkellogg]

SPZ support is now in the latest release: v0.4.7