Status key: ✅ done · 🚧 in progress · ⬜ planned
Target spec: IGES 5.3 (PDF). IGES 6.0 extensions are tracked separately.
Test corpus: test/fixtures/ (including Wikipedia slot), test/models/, and future IGES X-files.
| Item | Status |
|---|---|
iges-core package, section parser, Hollerith, param tokenizer |
✅ |
DE / PD mapping, IGESModel, warnings |
✅ |
| Type 124 transform resolution | ✅ |
| Unit tests + slot / arc fixtures | ✅ |
| Monorepo, docs, AGENTS.md | ✅ |
| Type | Name | Decode | Three.js | Tests |
|---|---|---|---|---|
| 116 | Point | ✅ | ✅ | ✅ |
| 110 | Line | ✅ | ✅ | ✅ |
| 100 | Circular arc | ✅ | ✅ | ✅ arc.iges |
| 106 | Copious data / paths | ✅ partial | ✅ | ✅ slot |
| 126 | NURBS curve | ✅ evaluate | ✅ sample | ⬜ dedicated fixture |
| 102 | Composite curve | ⬜ | ⬜ | ⬜ |
| 104 | Conic arc | ⬜ | ⬜ | ⬜ |
| 112 | Parametric spline curve | ⬜ | ⬜ | ⬜ |
| 123 | Direction | ⬜ meta | — | ⬜ |
| 124 | Transform | ✅ resolve | — | ⬜ |
| 402 | Associativity | ⬜ | ⬜ | ⬜ |
| 314 | Color definition | ⬜ | ⬜ | ⬜ |
| 408 | Subfigure instance | ⬜ | ⬜ | ⬜ |
Phase B exit criteria: slot + fmeparte wireframe renders correctly; composite curves follow DE pointers; colors from DE/314.
| Type | Name | Notes |
|---|---|---|
| 114 | Parametric spline surface | Polynomial patches |
| 118 | Ruled surface | Sweep between curves |
| 120 | Surface of revolution | |
| 122 | Tabulated cylinder | |
| 128 | Rational B-spline surface | Critical for most CAD |
| 141–144 | Boundary / trimmed surface | Needs UV trimming |
| 190–198 | Analytic surfaces | Plane, cylinder, sphere, torus |
Tessellation: adaptive UV grid → BufferGeometry meshes.
| Type | Name | Notes |
|---|---|---|
| 186 | Manifold solid B-rep | Shell pointer |
| 502–514 | Vertex/edge/loop/face/shell | Topology |
| 150–168 | Primitive solids | Block, cone, sphere… |
| 180 | Boolean tree | CSG |
Consider opencascade.js adapter package for production-grade solids.
parseAsyncuserData.iges on all objects (partial today)@konsept/iges-core npm package (optional separate publish)