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

65.3%

253,118 of 387,903 lines in green or partial units; 31.8% green

green

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 (81 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 19:33 UTC	0.3%	0.6%	3 / 260
2026-10-12 20:19 UTC	3.7%	5.3%	23 / 260
2026-10-12 21:05 UTC	7.5%	9.9%	39 / 260
2026-10-12 21:45 UTC	11.3%	13.6%	51 / 260
2026-10-12 22:36 UTC	13.2%	16.0%	58 / 260
2026-10-12 23:21 UTC	16.2%	19.1%	66 / 260
2026-10-12 23:52 UTC	17.6%	21.6%	71 / 260
2026-10-13 00:47 UTC	19.1%	24.0%	77 / 260
2026-10-13 01:38 UTC	20.2%	25.5%	82 / 260
2026-10-13 02:16 UTC	20.4%	27.5%	89 / 260
2026-10-13 03:04 UTC	20.4%	28.8%	92 / 260
2026-10-13 03:56 UTC	20.8%	30.4%	96 / 260
2026-10-13 04:34 UTC	21.3%	31.0%	97 / 261
2026-10-13 05:23 UTC	21.3%	32.0%	99 / 261
2026-10-13 06:09 UTC	21.5%	33.7%	104 / 261
2026-10-13 06:57 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 20:17 UTC	26.8%	37.0%	112 / 261
2026-10-13 20:50 UTC	26.8%	37.4%	113 / 261
2026-10-14 00:26 UTC	26.8%	37.8%	115 / 261
2026-10-14 01:08 UTC	26.8%	38.6%	117 / 261
2026-10-14 01:42 UTC	26.8%	39.1%	118 / 261
2026-10-14 02:29 UTC	26.8%	39.4%	119 / 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 13:18 UTC	26.8%	40.7%	122 / 261
2026-10-14 13:44 UTC	26.8%	40.9%	123 / 261
2026-10-14 14:33 UTC	26.8%	41.0%	124 / 261
2026-10-14 15:35 UTC	26.8%	42.0%	127 / 261
2026-10-14 16:21 UTC	26.8%	43.0%	129 / 261
2026-10-14 17:02 UTC	26.9%	44.1%	131 / 261
2026-10-14 17:48 UTC	27.2%	44.5%	132 / 261
2026-10-14 18:34 UTC	27.6%	45.6%	135 / 261
2026-10-14 19:11 UTC	28.0%	47.5%	139 / 261
2026-10-14 19:45 UTC	28.0%	47.9%	140 / 261
2026-10-14 20:29 UTC	28.4%	48.2%	141 / 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 23:16 UTC	28.4%	49.5%	145 / 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 01:24 UTC	28.4%	50.3%	147 / 261
2026-10-15 01:55 UTC	28.4%	50.4%	148 / 261
2026-10-15 02:34 UTC	28.4%	51.1%	149 / 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 06:52 UTC	29.1%	53.4%	156 / 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 12:39 UTC	29.2%	56.0%	163 / 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 16:35 UTC	29.2%	57.7%	167 / 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 22:43 UTC	31.1%	60.2%	174 / 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

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	36 / 40	56,771 / 65,449	87%
topology	16 / 31	21,625 / 52,301	41%
intersect	17 / 25	26,171 / 41,781	63%
primitive	1 / 5	649 / 7,956	8%
query	6 / 10	6,782 / 10,816	63%
mass	1 / 1	1,031 / 1,031	100%
sweep	2 / 5	910 / 5,725	16%
heal	3 / 7	5,045 / 11,877	42%
offset	0 / 3	0 / 6,605	0%
boolean	1 / 9	410 / 14,122	3%
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.
246 upstream issues found while porting.
Repository: how to port a unit, checklist.