bherbruckandClaude Opus 5.5
51ffaf9945
- IGES import (kernel iges_in, from the published specification). The file
is restated as STEP and read by the STEP reader, so an IGES file becomes
the same Import base feature.
- Manifold solid B-reps (186/514/510/508/504/502).
- Trimmed (144), bounded (143) and bare B-spline surfaces, sewn into a
solid by shared edges, with face orientation made consistent.
- Curves: lines, arcs, ellipses, composite and rational B-spline curves.
- Surfaces: planes, analytic surfaces 190-198, B-spline surfaces,
surfaces of revolution and tabulated cylinders.
- Transformations, units, colours, names (406 form 15 or labels).
Open, insert and drop .igs/.iges like STEP.
- IGES export (kernel iges_out): each body as a manifold solid B-rep on the
surfaces a STEP export uses, with name properties and colours.
ExportCommand to .igs.
- OBJ import as mesh bodies: objects/groups, polygons fanned, negative
indices, bad lines reported.
- STL: binary files whose header starts with "solid" and those with a zero
triangle count read as binary; non-finite vertices dropped; facet
normals ignored; ASCII with non-UTF-8 names. Mesh bodies get consistent
winding (stray inverted facets turned over).
- Tests: primitives and features round-trip through IGES (volume, area,
name, colour). Six trimmed patches sew into a closed box. Hostile IGES,
OBJ and STL inputs never panic. STL quirks. The engine exports a design
to IGES and opens it again. All 76 oracle parts round-trip through IGES
with matching volume (local check).
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01AS5Tn3xieewUSg3uxrMVdL
99 lines
11 KiB
Markdown
99 lines
11 KiB
Markdown
# STEP import
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SolveCraft reads STEP (ISO 10303-21; AP203, AP214 and AP242 geometry) with its own reader in `crates/kernel/src/step_in` (written from the public standards; no third-party STEP code). A STEP file becomes an **Import** base feature on the timeline: it holds the file's B-rep (the STEP text is kept in the design, so the design reopens without the file) and later features — fillets, holes, cuts sketched on its faces, shells — build on its bodies.
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- **Open**: File → Open (`doc.open`) accepts `.step`/`.stp` in any case and starts a new design; `solvecraft part.step`; `solvecraft-cli eval part.step`, `solvecraft-cli run script.json --in part.step`; the MCP `open` tool.
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- **Insert** into the current design: File → Insert STEP… or SOLID → INSERT (`FusionImportCommandFromToolbar {path}`).
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- **Drag and drop** a STEP file on the window: inserted when the design has features, opened otherwise.
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Read: manifold solid breps (with voids), faceted breps, shell-based surface models; planes, cylinders, cones, spheres, tori, B-spline and rational B-spline surfaces (with knots, Bézier, uniform, quasi-uniform), surfaces of revolution and linear extrusion, trimmed surfaces; lines, circles, ellipses, B-spline curves, polylines, trimmed/surface/seam curves; length and angle units (SI prefixes, conversion-based units such as inches); product names (body names come from the solid's name, else the product's); surface colours; assemblies (next-assembly-usage occurrences placed by item-defined transformations, and mapped items) — the product tree is kept in the feature for the components milestone. Files are untrusted: sizes, entity counts and nesting are capped and every kernel call is guarded. What cannot be read becomes a warning on the feature (a face left out gives an open body); not read yet: offset surfaces, pcurve-only edges.
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## IGES
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IGES 5.3 files (`.igs`/`.iges`) open, insert and drop the same way: `crates/kernel/src/iges_in.rs` (written from the published specification) restates the file as STEP and the STEP reader reads it, so the feature holds STEP text. Read: manifold solid B-reps (186) with their shells, faces, loops, edge and vertex lists; trimmed (144) and bounded (143) surfaces, and bare B-spline patches, sewn into a solid by their shared edges (an open body when they do not close); lines, circular arcs, ellipses, composite curves, rational B-spline curves; planes (108, 190), cylinders, cones, spheres, tori, rational B-spline surfaces, surfaces of revolution and tabulated cylinders; transformation matrices; units; colours (314 and the predefined numbers); body names (name properties, else labels). Not read yet: ruled and offset surfaces, curves on surfaces given only in parameter space. Export (`ExportCommand` to `.igs`) writes each body as a manifold solid B-rep on the same surfaces a STEP export uses, with its name and colour.
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## Fusion corpus
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Generated by `cargo xtask step-corpus`. Each case is a part exported from Fusion as STEP (AP214; kept locally in `plan/fusion/oracle/`, never committed). SolveCraft opens `part.step` exactly as File → Open does (an Import base feature) and compares with Fusion's own measurements: body count, volume and area (relative tolerance 1e-3) and the number of faces read from the file.
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**76 / 76 files pass.**
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| Case | Result | Bodies | Volume mm³ (got / Fusion) | Area mm² (got / Fusion) | Faces (got / Fusion) | ms | Notes |
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|---|---|---|---|---|---|---|---|
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| 01-box | pass | Box | 24000.000 / 24000.000 | 5200.000 / 5200.000 | 6 / 6 | 3 | |
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| 02-cylinder | pass | Cylinder | 35339.429 / 35342.917 | 6125.845 / 6126.106 | 3 / 3 | 87 | |
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| 03-box-through-hole | pass | Box | 45738.283 / 45738.053 | 9327.809 / 9327.788 | 7 / 7 | 62 | |
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| 04-revolve-vase | pass | Vase | 112488.847 / 112499.479 | 13156.093 / 13156.615 | 5 / 5 | 511 | |
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| 05-taper-extrude | pass | Frustum | 61814.826 / 61814.826 | 9676.915 / 9676.915 | 6 / 6 | 2 | |
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| 06-symmetric-extrude | pass | Block | 30000.000 / 30000.000 | 6200.000 / 6200.000 | 6 / 6 | 1 | |
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| 07-fillet-all-edges | pass | Box | 23340.621 / 23340.849 | 4726.220 / 4726.265 | 26 / 26 | 532 | |
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| 08-chamfer | pass | Box | 23730.667 / 23730.667 | 5029.352 / 5029.352 | 10 / 10 | 3 | |
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| 09-shell | pass | Box | 13632.000 / 13632.000 | 13992.000 / 13992.000 | 11 / 11 | 2 | |
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| 10-rect-pattern-holes | pass | Plate | 29803.713 / 29803.540 | 14652.481 / 14652.389 | 18 / 18 | 252 | |
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| 11-circular-pattern-flange | pass | Flange | 66758.144 / 66758.844 | 19320.617 / 19320.795 | 10 / 10 | 168 | |
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| 12-mirror-feature | pass | Base | 21392.575 / 21392.920 | 6530.944 / 6530.973 | 10 / 10 | 80 | |
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| 13-combine-join | pass | A | 45570.295 / 45571.680 | 8634.196 / 8634.336 | 9 / 9 | 43 | |
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| 14-combine-cut | pass | A | 42933.034 / 42931.417 | 9706.783 / 9706.858 | 7 / 7 | 402 | |
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| 15-combine-intersect | pass | A | 54452.172 / 54454.273 | 7382.532 / 7382.743 | 7 / 7 | 1022 | |
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| 16-sweep | pass | Tube | 2584.428 / 2584.724 | 1779.638 / 1779.698 | 5 / 5 | 612 | |
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| 17-loft | pass | Loft | 35121.595 / 35125.498 | 6495.373 / 6495.000 | 6 / 6 | 191 | |
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| 18-hole-features | pass | Plate | 33890.908 / 33890.710 | 8568.695 / 8568.696 | 13 / 13 | 184 | |
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| 19-l-bracket-constrained | pass | LBracket | 14720.000 / 14720.000 | 5472.000 / 5472.000 | 8 / 8 | 2 | |
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| 20-slot-constrained | pass | Slot | 2965.428 / 2965.487 | 1774.644 / 1774.690 | 6 / 6 | 15 | |
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| 21-draft | pass | Box | 54574.737 / 54574.737 | 8781.998 / 8781.998 | 6 / 6 | 1 | |
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| 22-split-body | pass | Cyl, Cyl (1) | 75390.813 / 75398.224 | 12954.440 / 12955.175 | 6 / 6 | 109 | |
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| 23-bracket-multifeature | pass | Bracket | 59331.477 / 59331.129 | 18290.767 / 18290.737 | 19 / 19 | 117 | |
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| 24-user-parameters | pass | Block | 34822.022 / 34821.903 | 8114.175 / 8114.159 | 7 / 7 | 58 | |
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| 25-sketch-triangle | pass | Triangle | 4032.155 / 4032.155 | 2274.099 / 2274.099 | 5 / 5 | 1 | |
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| 26-sketch-belt | pass | Belt | 11326.042 / 11326.170 | 5637.347 / 5637.404 | 7 / 7 | 42 | |
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| 27-sketch-trapezoid | pass | Trapezoid | 5342.286 / 5342.257 | 3066.961 / 3066.946 | 8 / 8 | 53 | |
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| 28-blind-pocket-fillets | pass | Block | 84299.345 / 84299.249 | 16279.560 / 16279.572 | 23 / 23 | 320 | |
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| 29-two-sided-and-partial-revolve | pass | Block | 25731.356 / 25731.307 | 6312.589 / 6312.602 | 12 / 12 | 26 | |
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| 30-fillet-after-shell | pass | Box | 21745.915 / 21745.876 | 14968.284 / 14968.332 | 27 / 27 | 464 | |
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| 31-fillet-l-all-edges | pass | L | 14321.483 / 14321.626 | 5024.004 / 5024.045 | 38 / 38 | 747 | |
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| 32-boss-plate-fillets | pass | Part | 33590.273 / 33590.350 | 9929.854 / 9929.864 | 10 / 10 | 1214 | |
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| 33-fillet-tangent-chain | pass | Slot | 8237.037 / 8237.122 | 2793.541 / 2793.569 | 14 / 14 | 555 | |
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| 34-chamfer-then-fillet | pass | Box | 22892.383 / 22892.421 | 4753.677 / 4753.688 | 18 / 18 | 54 | |
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| 35-fillet-curved-curved | pass | Tee | 63169.685 / 63171.443 | 10269.168 / 10269.348 | 6 / 6 | 904 | |
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| 36-corner-blend-two-radii | pass | Box | 57799.504 / 57800.240 | 8585.437 / 8585.524 | 18 / 18 | 519 | |
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| 37-pyramid-apex-blend | pass | Pyramid | 15465.376 / 15465.575 | 3914.529 / 3914.581 | 18 / 18 | 312 | |
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| 38-coincident-cylinders | pass | A | 15706.406 / 15707.963 | 3769.760 / 3769.911 | 3 / 3 | 67 | |
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| 39-tee-pipe | pass | Tee | 24095.763 / 24096.237 | 16709.772 / 16710.048 | 7 / 7 | 182 | |
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| 40-box-sphere-torus | pass | A | 36287.558 / 36287.433 | 10696.143 / 10696.165 | 10 / 10 | 2393 | |
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| 41-tube-radial-holes | pass | Tube | 20243.046 / 20243.981 | 14873.689 / 14873.773 | 22 / 22 | 1409 | |
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| 42-overlapping-patterns | pass | Plate | 38488.411 / 38487.064 | 21687.215 / 21686.603 | 43 / 43 | 533 | solid 'Plate': imported as an open body (the shell is not closed) |
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| 43-cut-splits-body | pass | Bar, Bar (1) | 28000.000 / 28000.000 | 7200.000 / 7200.000 | 12 / 12 | 5 | |
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| 44-shell-l-bracket | pass | L | 8384.000 / 8384.000 | 8784.000 / 8784.000 | 15 / 15 | 3 | |
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| 45-shell-boss-plate | pass | Part | 13676.354 / 13676.602 | 14156.531 / 14156.602 | 15 / 15 | 69 | |
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| 46-shell-two-open-faces | pass | Box | 16044.000 / 16044.000 | 11398.000 / 11398.000 | 10 / 10 | 3 | |
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| 47-draft-curved-pocket | pass | Block | 111387.998 / 111387.712 | 17700.336 / 17700.361 | 11 / 11 | 27 | |
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| 48-pulley | pass | Pulley | 168508.160 / 168510.841 | 23718.215 / 23718.644 | 12 / 12 | 321 | |
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| 49-helical-sweep | pass | Spring | 4733.931 / 4738.099 | 4765.903 / 4767.652 | 3 / 3 | 10552 | solid 'Spring': face wrapping around a closed surface kept whole: split line does not reach the rings |
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| 50-sweep-tight-bend | pass | Bend | 3758.025 / 3758.443 | – / – | 5 / 5 | 405 | |
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| 51-loft-rect-circle-offset | pass | Loft | 61129.957 / 61133.116 | 9412.473 / 9411.655 | 6 / 6 | 251 | |
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| 52-circular-pattern-fillet | pass | Hub | 47206.182 / 47206.850 | 14141.988 / 14142.171 | 21 / 21 | 820 | |
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| 53-path-pattern | pass | Plate | 35010.499 / 35010.398 | 16463.947 / 16463.894 | 13 / 13 | 130 | |
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| 54-mirror-body-fillets | pass | Bracket | 22780.113 / 22780.089 | 6972.831 / 6972.832 | 12 / 12 | 98 | |
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| 55-tapped-hole-cosmetic | pass | Plate | 17542.360 / 17542.314 | 4761.590 / 4761.596 | 8 / 8 | 84 | |
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| 56-holes-on-curved-face | pass | Cyl | 77941.171 / 77942.388 | 10592.951 / 10593.139 | 7 / 7 | 378 | |
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| 57-hole-pattern-sketch-points | pass | Plate | 36767.029 / 36766.712 | 11818.165 / 11818.153 | 24 / 24 | 197 | |
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| 58-phone-stand | pass | Stand | 74559.442 / 74559.177 | 29148.741 / 29148.785 | 19 / 19 | 24 | |
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| 59-enclosure-base | pass | Enclosure | 34309.038 / 34309.486 | 33795.405 / 33795.610 | 39 / 39 | 286 | |
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| 60-pipe-flange | pass | Flange | 323661.027 / 323660.979 | 56984.270 / 56984.564 | 16 / 16 | 993 | |
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| 61-shaft-keyway | pass | Shaft | 47521.504 / 47525.946 | 9676.781 / 9677.096 | 14 / 14 | 182 | |
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| 62-heat-sink | pass | HeatSink | 43125.000 / 43125.000 | 45725.000 / 45725.000 | 66 / 66 | 8 | |
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| 63-hinge-knuckle | pass | Hinge | 4783.029 / 4783.117 | 4110.255 / 4110.287 | 14 / 14 | 118 | |
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| 64-sketch-tangent-arc-chain | pass | Wave | 4800.000 / 4800.000 | 3843.701 / 3843.712 | 9 / 9 | 10 | |
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| 65-sketch-gear-tooth | pass | Tooth | 3987.831 / 3988.084 | 1945.416 / 1945.485 | 9 / 9 | 8 | |
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| 66-sketch-linkage | pass | Link | 8045.410 / 8045.386 | 4308.172 / 4308.175 | 10 / 10 | 129 | |
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| 67-sm-base-flange | pass | Body1 | 15000.000 / 15000.000 | 12800.000 / 12800.000 | 6 / 6 | 2 | |
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| 68-sm-edge-flange | pass | Body1 | 18972.476 / 18972.622 | 16057.518 / 16057.550 | 14 / 14 | 26 | |
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| 69-sm-tray | pass | Body1 | 29665.828 / 29666.234 | 24979.993 / 24980.086 | 46 / 46 | 66 | |
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| 70-sm-flange-45 | pass | Body1 | 18450.704 / 18450.777 | 15629.621 / 15629.637 | 14 / 14 | 14 | |
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| 71-sm-custom-rule | pass | Body1 | 10053.579 / 10053.717 | 13896.249 / 13896.299 | 22 / 22 | 38 | |
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| 72-sm-contour-flange | pass | Body1 | 12097.478 / 12097.622 | 10411.968 / 10412.002 | 22 / 22 | 36 | |
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| 73-sm-hem | pass | Body1 | 21334.478 / 21334.723 | 17994.397 / 17994.473 | 22 / 22 | 60 | |
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| 74-sm-unfold-refold | pass | Body1 | 15800.086 / 15800.304 | 13610.275 / 13610.326 | 32 / 32 | 84 | |
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| 75-sm-bracket-holes | pass | Body1 | 13915.866 / 13916.012 | 12035.934 / 12035.962 | 25 / 25 | 100 | |
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| 76-sm-thickness-variant | pass | Body1 | 22520.368 / 22520.575 | 16064.089 / 16064.128 | 14 / 14 | 31 | |
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