The truck B-rep pipeline is Z-up (solids extrude/raise along Z, profile
wires convert pass-through), but two spots still assumed a Y-up world:
- REVOLVE swapped the axis/origin to (x, z, y), so the revolve axis sat
in the XZ plane while the profile sat in XY → wrong solid. Use the
axis/origin straight through.
- OBJ import kept Y-up coordinates as-is on the (now Z-up) viewport, so
imported meshes lay on their side. Rotate +90° about X on import
(positions + normals): (x, y, z) → (x, -z, y).
EXTRUDE (sweep along +Z) and the box/cylinder primitives were already
Z-up and unchanged.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
d8c60c32d4