Interoperability · glTF / GLB
glTF 2.0 / GLB — the runtime spoke
B-rep to runtime asset in one call. This spoke has its own product name —
SceneReady — and its own gallery of
shipped GLBs; this page is the options reference. Output is validator-clean glTF 2.0:
.glb single-file binary, or .gltf JSON plus a sibling
.bin buffer.
Export — cad_export_body format:"gltf" | "glb"
| Option | Kind | What it does |
|---|---|---|
creaseAngleDeg | behavior | The crease gate for shading normals (default 30°): edges meeting more smoothly are welded to one shared normal, sharper ones keep a hard crease. This is what makes a runtime renderer shade the part correctly instead of showing flat faces as gradients. |
bakeTransforms | behavior | Bake the mm→m scale and Z-up→Y-up rotation into the vertex buffers, or (default) carry them on one root conversion node so downstream tooling can still read kernel-space mm out of the buffers. |
animations | behavior | Named node-TRS clips: exploded views from the assembly's own explode vectors, mate-driven kinematic sampling, turntables, or authored keyframe tables. |
materialsOverride | behavior | glTF 2.0 material objects passed through verbatim — one for every body, or exactly one per body; any other count is refused rather than guessed at. Kernel appearances map to metallic-roughness PBR by default. |
envelope | skips translation | Envelope Export: ship only the bodies that participate in the model's exterior appearance. Internal mechanisms never leave the source document — absent from the file, not hidden in it — and the result reports what was kept and what stayed home. On the gallery's sealed enclosure that's 7 of 26 bodies and a ~98% smaller GLB. |
envelopeViews | speed | Sampling quality for the envelope pass (default 26 directions) — raise it when a body visible only through a small opening must survive the cut. |
tolerance / maxTriangles | speed | The same tessellation dials as STL: chord tolerance or a hard triangle budget with an exact shortfall report. |
Try it
GLB nativecad-plate.glb 154 KB glTF nativecad-plate.gltf 4 KB BIN nativecad-plate.bin 152 KB
The kernel-authored sample plate as a single-file
GLB and as the JSON + buffer pair (the .gltf references the .bin beside
it). Drop the GLB into any three.js/Babylon viewer — or the
gallery for bigger ones.
Refused rather than silently ignored:
compression
and quantize (Draco / meshopt / KHR quantization) are on the roadmap, and the arguments refuse by name until they land. handle
is refused too — a cached mesh has no crease normals, and shipping it would reintroduce exactly
the shading defect the crease gate exists to prevent.