Boolean Operations via `three-csg`

[ixxie]

Boolean Operations via `three-csg`

[michealparks]

Also want to mention that there's https://gkjohnson.github.io/three-bvh-csg/ as an option, which is used in the react-three-fiber ecosystem (and the react-three-fiber library for reference: https://github.com/pmndrs/react-three-csg)

[grischaerbe]

@grischaerbe you had some thoughts about this; could you put them in writing to guide potential contributors?

Yes, of course. I do actually favor "three-bvh-csg" because the API surface is just so much smaller and it seems feature complete enough to be a viable package in the Threlte ecosystem. The author of the package is known to deliver great stuff for Three.js already, so that's a plus as well.

[jirihon]

I love this idea. You could describe solid models declaratively and easily connect them to user inputs.

I'd just like to add that there are other CSG engines out there. I'm convinced the current state of the art is manifold. I'm using their webassembly release in my threlte project and it is really fast and capable. You can even preserve UV coordinates and normals throughout all the boolean operations, see https://manifoldcad.org/model-viewer.html. The only limitation is that manifold requires manifold meshes. But if you think a little big about CSG, the result for non-manifold meshes can't be well-defined.

[ixxie]

@jirihon thanks for the input! Would you be interested in submitting a PR for porting manifold to @threlte/extras?

[ixxie]

On second thought it looks like that is so big it would need to be its own package, something like @threlte/manifold

[jirihon]

@jirihon thanks for the input! Would you be interested in submitting a PR for porting manifold to @threlte/extras?

Oh, that would be way beyond my current abilities and current focus. I'm getting slowly into the magic of Threlte architecture and I am increasingly appreciating all the effort that has gone into it.

[ixxie]

@grischaerbe you had some thoughts about this; could you put them in writing to guide potential contributors?