tangency-labs/solidcore

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A Rust port of NVIDIA's SMLib B-rep kernel (CAD subset): safe, deterministic, wasm-compatible

Is tangency-labs/solidcore beginner-friendly?

In the last 30 days, tangency-labs/solidcore merged 359 of 422 pull requests from outside contributors, and its maintainers usually reply within 1 day. 2 beginner-friendly issues are open now.

Stars: 279
Forks: 108
Open beginner issues: 2
Indexed issues: 154
Avg merge: 4h 20m
Merged PRs (30d): 906

Dominant language: Rust
License: Apache-2.0
Last GitHub push: Oct 31, 2026
Latest indexed: Oct 31, 2026
Contributing guide: No contributing guide
Code of conduct: No code of conduct
Beginner labels: help wanted good first issue

How to contribute to tangency-labs/solidcore

There is no contributing guide, so start from the README and a few recently merged pull requests to see how changes are proposed.
Your contributions will be published under the project's Apache-2.0 license.
Pick one of the 2 open beginner-friendly issues below and comment that you want to work on it before you start.

Beginner friendly Everything

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Issues somebody may already be working on are listed last. List everything by date

STEP: move SolidCraft's reader and builder into solidcore (record + ops)
Open
- Is something wrong?
help wanted

Difficulty 5/5 Over a week Newbie friendliness 25/100

tangency-labs/solidcore#2578 · Opened Nov 3, 2026

Maintainers usually reply within 1 day
STEP: merge the two pipelines into one (ideal for swarms): SolidCraft's reader, builder and exporter, plus what solidcore's crates add
Open
- Is something wrong?
help wanted

Difficulty 5/5 Over a week Newbie friendliness 8/100

tangency-labs/solidcore#2577 · Opened Nov 3, 2026

Maintainers usually reply within 1 day
B-spline check: the min-radius search reports a straight trim as a cusp (#13/#14) when its objective fails to evaluate
Open
- Is something wrong?
Difficulty 4/5 3-5 days Newbie friendliness 18/100

tangency-labs/solidcore#2574 · Opened Nov 3, 2026

Maintainers usually reply within 1 day
Sweep: screw and general-path sweeps as a ProceduralSweep definition (S, net, certified bound); refuse instead of silently loosening the fit
Open
- Is something wrong?
bug help wanted priority: high

Difficulty 5/5 Over a week Newbie friendliness 12/100

tangency-labs/solidcore#2572 · 1 comment · Opened Nov 3, 2026

Maintainers usually reply within 1 day
Round-on-round certificate assumes the support net's station invariant: a refitted or edited inner round is reported as proved
Open
- Is something wrong?
bug priority: high

Difficulty 5/5 Over a week Newbie friendliness 5/100

tangency-labs/solidcore#2570 · Opened Nov 3, 2026

Maintainers usually reply within 1 day
check_brep's global curve analysis makes circle extrudes 15-29x slower in SolidCraft
Open
- Is something wrong?
Difficulty 4/5 3-5 days Newbie friendliness 20/100

tangency-labs/solidcore#2568 · 5 comments · Opened Nov 3, 2026

Maintainers usually reply within 1 day
Interval B-spline basis builds knot differences from rounded doubles, so the fillet certificate's enclosures are not rigorous by construction
Open
- Is something wrong?
bug

Difficulty 5/5 Over a week Newbie friendliness 12/100

tangency-labs/solidcore#2559 · Opened Nov 3, 2026

Maintainers usually reply within 1 day
Chamfer just short of the corner rounds' radius (d 4.99–4.999999 on R5) fails with a bare 1001; d 4.9 and d 5 build
Open
- Is something wrong?
bug

Difficulty 4/5 3-5 days Newbie friendliness 22/100

tangency-labs/solidcore#2546 · 1 comment · Opened Nov 3, 2026

Maintainers usually reply within 1 day
Sweep: the analytic recognition turns the extrusion of a 0.89 mm cubic spline 7e-7 mm off its chord into a cylinder of radius 216985, which the surface check then refuses (SmSurfOfRevolution Test #10, 4.15e-3 against 2.6e-9); C++ alike
Open
- Is something wrong?
Difficulty 5/5 Over a week Newbie friendliness 12/100

tangency-labs/solidcore#2540 · Opened Nov 3, 2026

Maintainers usually reply within 1 day
Boolean: a box minus a tilted cylinder whose end-cap centre and seam end lie on the box's top face is refused (SmFace #36 twice; C++: Bad Gap ×8 at 9e-6 plus #36 ×2); 1 µm longer, the mirror image, or the same at the bottom face passes
Open
- Is something wrong?
Difficulty 5/5 Over a week Newbie friendliness 12/100

tangency-labs/solidcore#2537 · Opened Nov 3, 2026

Maintainers usually reply within 1 day
Remove WR-641 (fillet_through_extended_rail_end) once the smooth-vertex End is the construction
Open
- Is something wrong?
Difficulty 4/5 3-5 days Newbie friendliness 35/100

tangency-labs/solidcore#2500 · 3 comments · Opened Nov 3, 2026

Maintainers usually reply within 1 day
Port smlib#116: a drafted arc's wall is its exact cone
Open
- Is something wrong?
Difficulty 5/5 Over a week Newbie friendliness 35/100

tangency-labs/solidcore#2497 · 4 comments · Opened Nov 3, 2026

Maintainers usually reply within 1 day
Port smlib#123: blend step 4's Mixed corner, a convex and a concave blend meeting G1 across a tangent seam
Open
- Is something wrong?
Difficulty 5/5 Over a week Newbie friendliness 25/100

tangency-labs/solidcore#2496 · 7 comments · Opened Nov 3, 2026

Maintainers usually reply within 1 day
Loft: "every loft section must have the same number of holes" with 5 selected profiles that show no hole (v0.30.0-solidcore.g4726b9cd8)
Open
- Is something wrong?
Difficulty 4/5 3-5 days Newbie friendliness 30/100

tangency-labs/solidcore#2445 · 1 comment · Opened Nov 2, 2026

Maintainers usually reply within 1 day
Blend End: the smooth-vertex End (smlib#124, #2364) removes half the material on the sphere_plane round (3272.765 vs closed form 3261.519)
Open
- Is something wrong?
Difficulty 4/5 3-5 days Newbie friendliness 8/100

tangency-labs/solidcore#2441 · 1 comment · Opened Nov 2, 2026

Maintainers usually reply within 1 day
Solidcore-only blend fix: keep features sweeps a boss's walls in a body of their own (fillet_keep_features, WR-703)
Open
- Is something wrong?
Difficulty 5/5 Over a week Newbie friendliness 15/100

tangency-labs/solidcore#2426 · Opened Nov 2, 2026

Maintainers usually reply within 1 day
Blend: Building near a refusal's size bound fails: the bossed can and the bridged block
Open
- Is something wrong?
bug

Difficulty 5/5 Over a week Newbie friendliness 5/100

tangency-labs/solidcore#2404 · 2 comments · Opened Nov 2, 2026

Maintainers usually reply within 1 day
Blend: Corner: delete the old corner hierarchy
Open
- Is something wrong?
enhancement

Difficulty 5/5 Over a week Newbie friendliness 5/100

tangency-labs/solidcore#2400 · 4 comments · Opened Nov 2, 2026

Maintainers usually reply within 1 day
CI: SolidCraft's kernel rig as solidcore's operation-level gate, by area, with per-area known-failing lists and the parity gap to the fork
Open
- Is something wrong?
enhancement priority: high

Difficulty 5/5 Over a week Newbie friendliness 8/100

tangency-labs/solidcore#2394 · 3 comments · Opened Nov 2, 2026

Maintainers usually reply within 1 day
Nightly fuzz fails: blend.fillet_geom_p3 aborts on an unchecked allocation from input (430 GB), plus 20 s timeouts
Open
- Is something wrong?
bug priority: high

Difficulty 4/5 3-5 days Newbie friendliness 18/100

tangency-labs/solidcore#2393 · Opened Nov 2, 2026

Maintainers usually reply within 1 day
Blend corner: several concave rounds, and mixed corners with every edge blended (from smlib#84)
Open
- Is something wrong?
enhancement help wanted

Difficulty 5/5 Over a week Newbie friendliness 5/100

tangency-labs/solidcore#2361 · 2 comments · Opened Nov 2, 2026

Maintainers usually reply within 1 day
Blend End: a round ending at a smooth vertex, the mixed End's overflow refusal, the seam-vertex continuation (from smlib#81)
Open
- Is something wrong?
enhancement help wanted

Difficulty 5/5 Over a week Newbie friendliness 12/100

tangency-labs/solidcore#2358 · 5 comments · Opened Nov 2, 2026

Maintainers usually reply within 1 day
Blend corner: four blends over three faces (from smlib#88), with the old corner classes' inventory
Open
- Is something wrong?
enhancement help wanted

Difficulty 5/5 Over a week Newbie friendliness 5/100

tangency-labs/solidcore#2348 · 1 comment · Opened Nov 2, 2026

Maintainers usually reply within 1 day
Blend corner: a G2 setback fill beside circular rounds (from smlib#112)
Open
- Is something wrong?
enhancement help wanted

Difficulty 5/5 Over a week Newbie friendliness 12/100

tangency-labs/solidcore#2346 · 3 comments · Opened Nov 2, 2026

Maintainers usually reply within 1 day
Blend corner: the least certifying setback scale and streamed QP rows (from smlib#106 a/b)
Open
- Is something wrong?
enhancement help wanted

Difficulty 5/5 Over a week Newbie friendliness 8/100

tangency-labs/solidcore#2344 · 7 comments · Opened Nov 2, 2026

Maintainers usually reply within 1 day
Blend corner: the Setback beside curved faces (from smlib#85 part C): design, proofs, WIP
Open
- Is something wrong?
enhancement help wanted

Difficulty 5/5 Over a week Newbie friendliness 12/100

tangency-labs/solidcore#2343 · 3 comments · Opened Nov 2, 2026

Maintainers usually reply within 1 day
Port smlib#110, #113, #119: Ball on curved faces, old corner code removed, seam-angle measure
Open
- Is something wrong?
help wanted urgent

Difficulty 4/5 Over a week Newbie friendliness 18/100

tangency-labs/solidcore#2342 · 13 comments · Opened Nov 2, 2026

Maintainers usually reply within 1 day
Solidcore-only blend fix: ComputeNextPoint rejects a point far short of the step (fillet_trace_rejects_short_step, WR-503)
Open
- Is something wrong?
Difficulty 4/5 3-5 days Newbie friendliness 18/100

tangency-labs/solidcore#2341 · Opened Nov 2, 2026

Maintainers usually reply within 1 day
Solidcore-only blend fix: ComputePointValues' bigger-step retry uses the bigger step (fillet_point_bigger_step_retry, WR-456)
Open
- Is something wrong?
Difficulty 4/5 3-5 days Newbie friendliness 14/100

tangency-labs/solidcore#2338 · 1 comment · Opened Nov 2, 2026

Maintainers usually reply within 1 day
Solidcore-only blend fix: refuse two rounds whose rails cross on one face (fillet_refuse_crossing_rails, WR-460)
Open
- Is something wrong?
Difficulty 4/5 3-5 days Newbie friendliness 12/100

tangency-labs/solidcore#2336 · Opened Nov 2, 2026

Maintainers usually reply within 1 day
Solidcore-only blend fix: refuse a fillet result that is not a closed manifold solid (fillet_refuse_non_manifold_result, WR-212)
Open
- Is something wrong?
Difficulty 4/5 3-5 days Newbie friendliness 12/100

tangency-labs/solidcore#2335 · Opened Nov 2, 2026

Maintainers usually reply within 1 day
Solidcore-only blend fix: exact UV trims of plane sections on a cylinder (cylinder_plane_section_trims_exact, WR-680)
Open
- Is something wrong?
Difficulty 4/5 3-5 days Newbie friendliness 22/100

tangency-labs/solidcore#2331 · Opened Nov 2, 2026

Maintainers usually reply within 1 day
Solidcore-only blend fix: exact circular sections take one arc count per round (fillet_exact_arc_spans, WR-711)
Open
- Is something wrong?
Difficulty 4/5 3-5 days Newbie friendliness 15/100

tangency-labs/solidcore#2330 · 1 comment · Opened Nov 2, 2026

Maintainers usually reply within 1 day
Solidcore-only blend fix: refuse a round whose band breaks through a thin wall (fillet_refuse_rounds_breaking_through, WR-707)
Open
- Is something wrong?
Difficulty 4/5 3-5 days Newbie friendliness 15/100

tangency-labs/solidcore#2328 · 1 comment · Opened Nov 2, 2026

Maintainers usually reply within 1 day
Box/cylinder union with coplanar bases: GetFaces order differs from C++ (merged base face first in C++, fifth in Rust)
Open
- Is something wrong?
Difficulty 4/5 3-5 days Newbie friendliness 25/100

tangency-labs/solidcore#2195 · 1 comment · Opened Nov 1, 2026

Maintainers usually reply within 1 day
Boolean of a twisted sweep with a face lying on another face fails slowly with 1001, or runs for minutes (C++ and Rust alike)
Open
- Is something wrong?
Difficulty 5/5 Over a week Newbie friendliness 12/100

tangency-labs/solidcore#2184 · 2 comments · Opened Nov 1, 2026

Maintainers usually reply within 1 day
Statuses the SolidCraft SMLib fork passes on that solidcore still drops (16 fork commits, after #483/#1775)
Open
- Is something wrong?
bug help wanted

Difficulty 4/5 3-5 days Newbie friendliness 35/100

tangency-labs/solidcore#2009 · 6 comments · Opened Oct 31, 2026

Maintainers usually reply within 1 day
Audit: UpstreamFixes flags SolidCraft turns on that no test reaches or that are inert
Open
- Is something wrong?
Difficulty 3/5 1-2 days Newbie friendliness 45/100

tangency-labs/solidcore#1954 · 14 comments · Opened Oct 31, 2026

Maintainers usually reply within 1 day
Extremly long calculation times for fillets and extrusion
Open
- Is something wrong?
Difficulty 4/5 3-5 days Newbie friendliness 48/100

tangency-labs/solidcore#1574 · 1 comment · Opened Oct 29, 2026

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Fillet: the blend is larger than the neighbouring faces
Open
- Is something wrong?
Difficulty 4/5 3-5 days Newbie friendliness 45/100

tangency-labs/solidcore#1566 · 2 comments · Opened Oct 29, 2026

Maintainers usually reply within 1 day
When solidcore-ssi is wired in: a Kernel-held SSI callback, so an engine outside the workspace can be selected too?
Open
- Is something wrong?
Difficulty 5/5 Over a week Newbie friendliness 35/100

tangency-labs/solidcore#1552 · Opened Oct 29, 2026

Maintainers usually reply within 1 day
Rust-only: the #1410 cliff-end fillet fails earlier in the port — rail-rail corner vertex solve never converges (create_corner_vertices, FilletCornerId(9)/VertexId(32))
Open
- Is something wrong?
Difficulty 4/5 3-5 days Newbie friendliness 45/100

tangency-labs/solidcore#1485 · 3 comments · Opened Oct 29, 2026

Maintainers usually reply within 1 day
a boolean cannot carry caller attributes (face/edge identity) from operands to result
Open
- Is something wrong?
bug priority: high

Difficulty 4/5 3-5 days Newbie friendliness 50/100

tangency-labs/solidcore#1462 · 3 comments · Opened Oct 29, 2026

Maintainers usually reply within 1 day
Scope: plane sections, projection onto a plane and lines-and-arcs output, planned?
Open
- Is something wrong?
Difficulty 4/5 3-5 days Newbie friendliness 35/100

tangency-labs/solidcore#1420 · Opened Oct 28, 2026

Maintainers usually reply within 1 day
Scope: whole-body validity check (SmBrep::AssertValid), planned?
Open
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Difficulty 5/5 Over a week Newbie friendliness 38/100

tangency-labs/solidcore#1419 · 1 comment · Opened Oct 28, 2026

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Scope: body-level tessellation (SmApiTessellate), planned?
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Difficulty 5/5 Over a week Newbie friendliness 25/100

tangency-labs/solidcore#1418 · Opened Oct 28, 2026

Maintainers usually reply within 1 day
Eased setbacks: every corner of a rounded box eased by 4 is refused as not solid (the stitch glues a face curve's ends 5.66 mm apart)
Open
- Is something wrong?
bug priority: high

Difficulty 4/5 3-5 days Newbie friendliness 38/100

tangency-labs/solidcore#1386 · 4 comments · Opened Oct 28, 2026

Maintainers usually reply within 1 day
Triage: open issues already fixed on main (no closing keyword)
Open
- Is something wrong?
Difficulty 2/5 1-3 hours Newbie friendliness 65/100

tangency-labs/solidcore#1206 · 5 comments · Opened Oct 26, 2026

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SmPolyBrep::CombineCoincidentVertices lists a slit PolyFace twice; CheckForSqueezeVertices squeezes it through its deleted PolyBrep
Open
- Is something wrong?
bug priority: high

Difficulty 2/5 1-3 hours Newbie friendliness 82/100

tangency-labs/solidcore#810 · 1 comment · Opened Oct 24, 2026

Maintainers usually reply within 1 day
Define the workflow for fixes requiring an updated C++ reference
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Difficulty 4/5 3-5 days Newbie friendliness 35/100

tangency-labs/solidcore#751 · Opened Oct 24, 2026

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