solidcore

solidcore is a Rust port of NVIDIA's SMLib, the boundary-representation (B-rep) solid modeling kernel from usd-brep (Apache-2.0), written in safe Rust: no unsafe, no panics on bad input, deterministic, and buildable for WebAssembly. The upstream code is split into 261 port units. A unit only counts as green when the difftest gate runs the Rust and the upstream C++ (through FFI) on the same inputs (upstream tests, fixtures and fixed-seed generated cases) and the topology is identical and every value agrees within 1e-9 relative. A partial unit passes every case it can run; its other cases are deferred because they reach code that is not ported yet. This page is regenerated from the repository on every push to main.

Upstream lines ported

71.3%

276,468 of 387,903 lines in green or partial units; 36.0% green

green

108

units

partial

units

claimed

units

todo

units

ready to claim

todo with all dependencies done

Progress over time

Share of in-scope upstream lines in green and partial units, from plan/modules.toml along main's history (79 sampled states).

green (bit-identical to C++)green + partial (ported)

Timeline as a table

Commit time	Green lines	Ported lines	Units ported
2026-10-12 18:49 UTC	0.0%	0.0%	0 / 260
2026-10-12 19:48 UTC	1.1%	2.0%	7 / 260
2026-10-12 20:49 UTC	6.1%	8.1%	33 / 260
2026-10-12 21:45 UTC	11.3%	13.6%	51 / 260
2026-10-12 22:47 UTC	14.3%	17.1%	60 / 260
2026-10-12 23:51 UTC	17.6%	21.6%	71 / 260
2026-10-13 00:47 UTC	19.1%	24.0%	77 / 260
2026-10-13 01:46 UTC	20.3%	26.0%	84 / 260
2026-10-13 02:46 UTC	20.4%	28.3%	91 / 260
2026-10-13 03:26 UTC	20.8%	29.9%	95 / 260
2026-10-13 04:49 UTC	21.3%	31.6%	98 / 261
2026-10-13 05:53 UTC	21.4%	33.1%	102 / 261
2026-10-13 06:53 UTC	21.5%	34.7%	106 / 261
2026-10-13 07:12 UTC	21.5%	35.1%	107 / 261
2026-10-13 09:20 UTC	26.8%	36.3%	110 / 261
2026-10-13 16:45 UTC	26.8%	36.5%	111 / 261
2026-10-13 19:18 UTC	26.8%	36.5%	111 / 261
2026-10-13 20:50 UTC	26.8%	37.4%	113 / 261
2026-10-13 23:55 UTC	26.8%	37.5%	114 / 261
2026-10-14 00:49 UTC	26.8%	38.3%	116 / 261
2026-10-14 01:42 UTC	26.8%	39.1%	118 / 261
2026-10-14 02:52 UTC	26.8%	39.6%	120 / 261
2026-10-14 03:59 UTC	26.8%	40.2%	121 / 261
2026-10-14 13:44 UTC	26.8%	40.9%	123 / 261
2026-10-14 14:59 UTC	26.8%	41.3%	125 / 261
2026-10-14 15:35 UTC	26.8%	42.0%	127 / 261
2026-10-14 17:02 UTC	26.9%	44.1%	131 / 261
2026-10-14 18:06 UTC	27.6%	44.9%	133 / 261
2026-10-14 19:07 UTC	28.0%	47.5%	139 / 261
2026-10-14 19:45 UTC	28.0%	47.9%	140 / 261
2026-10-14 21:11 UTC	28.4%	48.6%	142 / 261
2026-10-14 22:02 UTC	28.4%	48.9%	143 / 261
2026-10-14 22:41 UTC	28.4%	49.1%	144 / 261
2026-10-14 23:49 UTC	28.4%	50.0%	146 / 261
2026-10-15 00:48 UTC	28.4%	50.0%	146 / 261
2026-10-15 01:55 UTC	28.4%	50.4%	148 / 261
2026-10-15 03:07 UTC	28.4%	51.3%	150 / 261
2026-10-15 03:39 UTC	28.4%	51.3%	150 / 261
2026-10-15 04:59 UTC	28.4%	52.1%	152 / 261
2026-10-15 05:53 UTC	28.4%	52.4%	153 / 261
2026-10-15 07:04 UTC	29.1%	53.6%	157 / 261
2026-10-15 07:56 UTC	29.1%	53.8%	158 / 261
2026-10-15 09:04 UTC	29.1%	54.3%	159 / 261
2026-10-15 09:53 UTC	29.2%	54.9%	160 / 261
2026-10-15 10:34 UTC	29.2%	55.4%	161 / 261
2026-10-15 11:32 UTC	29.2%	55.8%	162 / 261
2026-10-15 13:19 UTC	29.2%	56.6%	164 / 261
2026-10-15 14:26 UTC	29.2%	57.0%	165 / 261
2026-10-15 15:39 UTC	29.2%	57.5%	166 / 261
2026-10-15 17:18 UTC	29.2%	58.3%	168 / 261
2026-10-15 19:02 UTC	29.2%	58.7%	170 / 261
2026-10-15 20:02 UTC	30.5%	59.1%	171 / 261
2026-10-15 21:04 UTC	30.5%	59.4%	172 / 261
2026-10-15 21:36 UTC	31.1%	59.7%	173 / 261
2026-10-15 23:05 UTC	31.1%	60.4%	175 / 261
2026-10-16 00:05 UTC	31.1%	60.6%	176 / 261
2026-10-16 01:07 UTC	31.1%	60.8%	177 / 261
2026-10-16 01:43 UTC	31.1%	61.4%	178 / 261
2026-10-16 02:58 UTC	31.5%	61.7%	179 / 261
2026-10-16 04:15 UTC	31.5%	62.2%	180 / 261
2026-10-16 05:22 UTC	31.5%	63.0%	181 / 261
2026-10-16 07:27 UTC	31.8%	63.4%	182 / 261
2026-10-16 08:47 UTC	31.8%	63.9%	183 / 261
2026-10-16 10:14 UTC	31.8%	64.8%	185 / 261
2026-10-16 12:07 UTC	31.8%	65.3%	186 / 261
2026-10-16 13:21 UTC	31.8%	65.3%	186 / 261
2026-10-16 15:22 UTC	36.0%	66.4%	188 / 261
2026-10-16 16:31 UTC	36.0%	67.4%	190 / 261
2026-10-16 17:28 UTC	36.0%	67.6%	191 / 261
2026-10-16 18:29 UTC	36.0%	67.8%	192 / 261
2026-10-16 19:51 UTC	36.0%	68.4%	193 / 261
2026-10-16 20:35 UTC	36.0%	68.5%	194 / 261
2026-10-16 21:43 UTC	36.0%	68.8%	195 / 261
2026-10-16 23:23 UTC	36.0%	68.8%	195 / 261
2026-10-17 00:19 UTC	36.0%	69.1%	196 / 261
2026-10-17 01:02 UTC	36.0%	69.6%	197 / 261
2026-10-17 14:51 UTC	36.0%	70.6%	199 / 261
2026-10-17 17:35 UTC	36.0%	71.3%	200 / 261
2026-10-17 18:44 UTC	36.0%	71.3%	200 / 261

By module

Module	Units ported	Lines	%
geom	29 / 29	26,571 / 26,571	100%
nurbs	48 / 48	70,508 / 70,508	100%
curve	25 / 25	35,409 / 35,409	100%
surface	37 / 40	59,145 / 65,449	90%
topology	17 / 31	23,796 / 52,301	45%
intersect	22 / 25	35,769 / 41,781	86%
primitive	1 / 5	649 / 7,956	8%
query	6 / 10	6,782 / 10,816	63%
mass	1 / 1	1,031 / 1,031	100%
sweep	4 / 5	3,269 / 5,725	57%
heal	5 / 7	7,934 / 11,877	67%
offset	0 / 3	0 / 6,605	0%
boolean	4 / 9	4,369 / 14,122	31%
blend	1 / 22	1,236 / 37,752	3%
(crate-wide)	0 / 1	0 / 0	0%

greenpartial

Surface/surface intersection corpus

119 cases from the external ssi-corpus, scored against known true intersections. Rust and C++ are compared where the Rust path is ported: 3 compared, 3 identical, 0 mismatched. All cases.

Verdict	C++	Rust
DEFERRED	0	116
ERROR	2	0
INCOMPLETE	25	0
PASS	81	3
WRONG TOPOLOGY	11	0

Elsewhere

All 261 units, with difftest results and blockers.
264 upstream issues found while porting.
Repository: how to port a unit, checklist.