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Doing just this. Starting with BIM/IFCjs but have near-term plans for integrating a STEP-compatible engine soon.

Thanks for the opencascade/wasm link.. looks like a nice option!

github.com/buildrs/Share

"building a new open source one from scratch would be Herculean effort."

how are you tackling this?

Agree it's a big effort, so approaching as open as we can to attract cooperation. We also have a new company that has taken seed funding. I'm a systems engineer/data scientist, working with architects and 3d folks who know the state of the art well.

The architecture will tend towards platform + apps, to help address the scale problem. We're looking to partner/port the geometry kernel and focus on workflow and integration with open standards (IFC,STEP,gltf,Collada).

Initial UI is in react+three.js (soon react-three-fiber) with git for file-based versioning underneath. Also interested in recent discussions on HN about CRDTs on Matrix for collaboration. So kind of a CRDT real-time google docs capability on top of a persistent file based rep on git. This part is very fun coding :)

Just getting started! Appreciate any feedback, esp on our github/discord :)

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