Common parts
Recipes to reach for when the shape calls for them:
| Part | How to build it |
|---|---|
| Raised marks / lettering | Reuse the cut part's outline path → SVGLoader → ExtrudeGeometry, and place it at z = panel thickness. Add it to the content group like everything else — it inherits the group's Y flip, so do not flip it again |
| Thin rings / outlined parts | Generate inner and outer outlines at radius ± stroke/2 and extrude the thin ring; sample circles smoothly, flatten polygons |
| Fold-up flaps | Treat every open cut arc as one flap, with the hinge axis running between the arc's two endpoints (its chord). Extrude the flap and rotate it about that axis, in whichever direction lifts the flap's centroid toward +z. The base panel gets the matching hole punched out, while the uncut core stays solid. Cycle the fold angle through a small set of values so the result looks natural |