Rust implementation

[Filyus]

Hello everyone! It took me about a month of vibe coding in my spare time to create the Draco library entirely in Rust. It wasn't easy and required a lot of patience, but I'm finally happy to share the code with everyone:
https://github.com/Filyus/draco/tree/api

First, I split the C++ code into two projects and moved all the .cc files to root folders:

• https://github.com/Filyus/draco/tree/api/draco_core
• https://github.com/Filyus/draco/tree/api/draco_io

Then I created the code in Rust:
https://github.com/Filyus/draco/tree/api/crates
I also split it into draco-core and draco-io, which supports converting geometry (and, if possible, normals) to and from GLTF/GLB, FBX, OBJ, and PLY.

I also wrote WASM modules and a sample web application for conversion:
https://github.com/Filyus/draco/tree/api/web

As a result, the size of gltf_reader.wasm is 203 KB, compared to draco_decoder.wasm, which is 279 KB from the original library. My module supports GLTF/GLB in addition to Draco's decoding capabilities.

The code successfully passes about 150 tests and compiles without errors or warnings. There are still some extra files in the repository, but I plan to remove them soon. I'm open to suggestions and help improving the code.

TODO:
Fix EdgeBreaker with normals and multi-attribute encoding.

[Filyus]

I’ve implemented all prediction schemes and full compression level support (with some assistance from an LLM). I’m planning to release it today or tomorrow.

If my measurements are correct, the results look very promising: the Rust implementation is ~10× faster for encoding and ~5× faster for decoding, while producing byte-for-byte identical .drc output.

Stay tuned. Thanks for keeping this issue open.