Native SketchUp (.skp) loader — no server round-trip, no proprietary SDK

[iamahsanmehmood]

Three.js/three-stdlib has loaders for most common formats, but nothing for SketchUp .skp — right now the only way to get a SketchUp model into a Three.js scene is exporting to glTF/OBJ from SketchUp first, which needs SketchUp installed, or piping through a server-side conversion service.

OpenSKP is an MIT-licensed, from-scratch .skp reader (no Trimble SDK, no native binary, pure TypeScript — openskp on npm) that already runs in both Node and the browser. It parses geometry, materials, layers, and instancing, and can bake a full triangulated scene (buildScene()) ready to hand to a renderer.

A SKPLoader extending three-stdlib's Loader would be a fairly small wrapper: read the file into an ArrayBuffer, call SkpFile.fromBuffer(buffer).buildScene(), and walk the result into THREE.Group/BufferGeometry/MeshStandardMaterial the same way OBJLoader/GLTFLoader do today. There's already a working reference implementation doing exactly this in OpenSKP's own example viewer (examples/web-viewer), so this wouldn't be starting from zero.

Would a SKPLoader be something this repo wants? Happy to put together a PR if there's interest — wanted to check first rather than show up with an unsolicited loader nobody asked for.