OneCAD-Simulation/docs/meshing/corpus.md

Meshing test corpus

Generated by cargo xtask corpus; do not edit. The parts are our own: SolidCraft recipes in tests/corpus/<name>/recipe.json and analytic shapes generated in code (crates/testkit/src/corpus.rs). Each run rebuilds every part, tessellates it at a chordal tolerance of 1e-3 of its bounding-box diagonal and runs every stage on it. Times are wall clock on the machine that ran it; every other column is deterministic.

Results

part	categories	bodies	faces	triangles	tol. mm	build ms	enclosed mm³	SolidCraft mm³	rel. diff	exact mm³	boundary	genus	feature edges	check ms	CDT tets	Steiner	cavities	tet gate	CDT ms	hex	hex elements	hex8 min SJ	hex20 min SJ	hex ms	octree hexes	min SJ	mean SJ	hex vol. diff	octree ms
bent-tube	sweepable, thin-wall, genus	1	18	4296	0.121	433	4213.1	4159.4	1.3e-2	4159.8	ok, 2148 vertices	1	268	11.4	15550	2338	0	pass	609	sweep	192	0.859	0.997	63	no: Tube: meshing failed: the core's boundary has components of genus [0, 0, 0, 0], the part [1]: the part has walls 0.984 thick, thinner than 3 cells of the deepest level (0.536); use a smaller size, more levels, or a structured (swept) hex mesh				572
bolted-assembly	assembly, blocky	3	22	284	0.117	54	33004.7	32999.0	1.7e-4	32998.9	ok, 144 vertices	0, 1, 1	104	0.7	690	181	0	pass	35	extrude	357	0.398	0.222	42	41344	0.323	0.961	2.0e-4	11261
cantilever-i-beam	sweepable, thin-wall	1	14	44	0.208	3	61600.0	61600.0	0.0e0	61600.0	ok, 24 vertices	0	36	0.2	90	24	0	pass	3	extrude	336	0.707	0.707	34	no: Beam: meshing failed: the core's boundary has components of genus [0, 0], the part [0]: the part has walls 2.000 thick, thinner than 3 cells of the deepest level (0.924); use a smaller size, more levels, or a structured (swept) hex mesh				908
cross-cylinders	boolean, sharp	1	10	1395	0.087	7820	32197.4	32357.8	-5.0e-3	32365.8	error: Cross: invalid boundary surface: 28 defects; triangles 142 and 184 are oriented inconsistently across edge 0–396 at (-15.488656021315903, 4.577998041166734, 7.853092194999726); triangles 184 and 239 are oriented inconsistently across edge 0–554 at (-18.75000000000002, 5.634596901641276, 7.632255089815496); edge 103–108 at (-0.16007784063084018, 0.03984236936862052, 9.998639270596865) is shared by 3 triangles; …				error: Cross: invalid boundary surface: 28 defects; triangles 142 and 184 are oriented inconsistently across edge 0–396 at (-15.488656021315903, 4.577998041166734, 7.853092194999726); triangles 184 and 239 are oriented inconsistently across edge 0–554 at (-18.75000000000002, 5.634596901641276, 7.632255089815496); edge 103–108 at (-0.16007784063084018, 0.03984236936862052, 9.998639270596865) is shared by 3 triangles; …					error: Cross: invalid boundary surface: 28 defects; triangles 142 and 184 are oriented inconsistently across edge 0–396 at (-15.488656021315903, 4.577998041166734, 7.853092194999726); triangles 184 and 239 are oriented inconsistently across edge 0–554 at (-18.75000000000002, 5.634596901641276, 7.632255089815496); edge 103–108 at (-0.16007784063084018, 0.03984236936862052, 9.998639270596865) is shared by 3 triangles; …					error: Cross: invalid boundary surface: 28 defects; triangles 142 and 184 are oriented inconsistently across edge 0–396 at (-15.488656021315903, 4.577998041166734, 7.853092194999726); triangles 184 and 239 are oriented inconsistently across edge 0–554 at (-18.75000000000002, 5.634596901641276, 7.632255089815496); edge 103–108 at (-0.16007784063084018, 0.03984236936862052, 9.998639270596865) is shared by 3 triangles; …
filleted-bracket	fillet, genus, sweepable	1	13	540	0.088	388	32162.3	32145.0	5.4e-4	32144.8	ok, 268 vertices	2	135	1.4	5582	1613	0	pass	201	no: Bracket: not supported yet: no structured hex method fits this body (extrude: cylindrical face 8 is not parallel to the direction; sweep: from face 1: linking face 6 has 2 boundary loops (periodic or holed linking faces are not swept); from face 6:				5	30676	0.305	0.963	8.3e-4	10213
filleted-bracket-blocks	fillet, genus, partitioned	30	190	712	0.088	1006	32169.8	32145.1	7.7e-4	32144.8	ok, 416 vertices	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0	474	1.6	1423	349	0	pass	56	blocks (30 cells, 45 shared faces)	4986	0.705	0.705	542	149898	0.156	0.935	9.7e-4	36760
i-beam	sweepable, thin-wall	1	14	44	0.208	3	61600.0	61600.0	0.0e0	61600.0	ok, 24 vertices	0	36	0.1	94	24	0	pass	4	extrude	336	0.707	0.707	33	no: Beam: meshing failed: the core's boundary has components of genus [0, 0], the part [0]: the part has walls 2.000 thick, thinner than 3 cells of the deepest level (0.924); use a smaller size, more levels, or a structured (swept) hex mesh				874
loft-transition	organic	1	6	292	0.075	56	56390.2	56450.6	-1.1e-3	–	ok, 148 vertices	0	40	0.7	1329	256	1	pass	36	sweep	2873	0.189	0.189	329	67188	0.210	0.959	-1.2e-3	16559
perforated-plate	genus, thin-wall, sweepable	1	54	1644	0.144	252	26822.2	26764.6	2.2e-3	26764.2	ok, 776 vertices	24	828	4.7	33611	9798	0	pass	1276	extrude	467	0.304	0.033	98	185128	0.300	0.958	2.5e-3	70289
pinhole-block	small-feature, genus	1	38	4044	0.073	195	49919.4	49909.6	2.0e-4	49909.5	ok, 1992 vertices	16	1548	12.7	96411	30221	0	pass	4479	extrude	5236	0.408	0.392	587	no: Block: meshing failed: octree hex meshing failed after 2 builds: the feature corner at [9.76, 10.180000000000001, 10.526315789473685] has no vertex; refining for another build needs more than 250000 grid cells (the grid needs more than 250000 cell				2009
rounded-box	fillet	1	26	2540	0.054	147	23325.7	23340.5	-6.3e-4	23340.8	ok, 1272 vertices	0	216	6.3	11701	1928	0	pass	387	no: Box: not supported yet: no structured hex method fits this body (extrude: cylindrical face 6 is not parallel to the direction; sweep: from face 0: 12 faces are not on the sweep path; from face 5: 12 faces are not on the sweep path; revolve: plan				14	76430	0.561	0.985	-1.3e-3	26673
shallow-groove	near-tangent, boolean	1	8	62	0.075	11	47795.2	47782.3	2.7e-4	47781.5	ok, 33 vertices	0	24	0.2	267	87	0	pass	12	extrude	1960	0.991	0.986	196	2926	0.301	0.920	3.4e-4	982
sharp-wedge	sharp, thin-wall, sweepable	1	5	8	0.083	2	3200.0	3200.0	0.0e0	3200.0	ok, 6 vertices	0	9	0.0	11	3	0	pass	0	extrude	294	0.050	0.050	30	84952	0.003	0.980	-3.5e-2	23994
sphere-on-plate	near-tangent, boolean	1	12	2826	0.098	686	69353.3	69509.0	-2.2e-3	69509.7	ok, 1415 vertices	0	124	5.9	4898	309	9	pass	227	no: Plate: not supported yet: no structured hex method fits this body (extrude: face 6 is curved across the direction; sweep: from face 0: 6 faces are not on the sweep path; from face 5: linking face 11 has 2 boundary loops (periodic or holed linking				10	25194	0.065	0.945	4.4e-2	20477
spline-vase	organic	1	11	3890	0.106	217	94891.2	94948.5	-6.0e-4	–	ok, 1947 vertices	0	243	8.6	12461	1512	0	pass	439	sweep	4554	0.649	0.649	522	no: Vase: limit reached: the grid needs more than 500000 cells				2308
stepped-block	blocky, sharp	1	14	96	0.078	29	47000.0	47000.0	0.0e0	47000.0	ok, 48 vertices	1	60	0.4	223	41	0	pass	7	extrude	1416	0.999	0.999	137	52274	0.076	0.975	-2.7e-6	14558
thin-ribs	thin-wall, blocky	1	26	92	0.119	62	32000.0	32000.0	-4.5e-16	32000.0	ok, 48 vertices	0	72	0.5	171	33	0	pass	7	extrude	777	0.844	0.844	76	no: Plate: limit reached: the grid needs more than 500000 cells				1111
thin-wall-enclosure	thin-wall, blocky	1	11	36	0.108	8	15564.0	15564.0	0.0e0	15564.0	ok, 20 vertices	0	28	0.1	191	47	2	pass	5	extrude	894	0.297	0.297	89	no: Enclosure: meshing failed: the core's boundary has components of genus [0, 0], the part [0]: the part has walls 1.000 thick, thinner than 3 cells of the deepest level (0.479); use a smaller size, more levels, or a structured (swept) hex mesh				1623
analytic-sphere	analytic	1	6	2784	0.069	247	33353.4	33507.9	-4.6e-3	33510.3	ok, 1394 vertices	0	96	5.9	4211	58	0	pass	266	no: Sphere: not supported yet: no structured hex method fits this body (extrude: no direction to try; sweep: no planar face to sweep from; revolve: no axis to try; mapped: meshing failed: meshing failed: mesh validity gate: 8 inverted or degenerate ele				23	2400	0.538	0.866	-1.3e-2	966
analytic-torus	analytic, genus	1	6	7230	0.109	337	37644.1	37893.7	-6.6e-3	37899.3	ok, 3615 vertices	1	180	15.8	19790	466	0	pass	761	revolve	1134	0.706	0.706	168	18814	0.460	0.881	-1.2e-2	5646
analytic-cylinder	analytic, sweepable	1	4	1004	0.049	26	12533.1	12564.7	-2.5e-3	12566.4	ok, 504 vertices	0	106	2.7	7437	1568	0	pass	267	extrude	3200	0.707	0.707	331	2424	0.532	0.919	-9.1e-3	699
analytic-pipe	analytic, genus, sweepable	1	6	1448	0.104	44	94150.9	94238.0	-9.3e-4	94247.8	ok, 724 vertices	1	220	3.8	6238	1340	0	pass	272	extrude	1288	0.998	0.998	145	53680	0.520	0.944	-7.8e-4	14728
analytic-plate-hole	analytic, genus, sweepable	1	8	112	0.224	11	98449.1	98429.5	2.0e-4	98429.2	ok, 56 vertices	1	62	0.4	1868	543	0	pass	53	extrude	321	0.320	0.142	38	163664	0.309	0.989	2.2e-4	51714

Categories

category	stresses	parts
thin-wall	walls thin against the part's size	7
small-feature	features much smaller than the part	1
fillet	blends between faces	3
genus	through holes (genus > 0)	8
sharp	sharp edges and acute dihedral angles	3
near-tangent	faces meeting at a shallow angle	2
boolean	intersection curves from booleans	3
sweepable	extrusions and sweeps (one-to-one sweep meshing)	9
blocky	axis-aligned blocks (polycube-friendly)	4
organic	free-form, lofted or revolved spline surfaces	2
assembly	several bodies placed by component transforms	1
partitioned	split into cells that each mesh as a mapped block (conforming multi-block hex)	1
analytic	closed-form geometry for solver verification	5

Parts

• bent-tube: A 10 mm tube with a 1 mm wall, bent through R30: a thin-walled sweep along a line-arc-line path.
• bolted-assembly: A base plate with a clamp block component placed twice, once turned 90 degrees: bodies placed by component transforms.
• cantilever-i-beam: The 200 mm I-beam of i-beam lying along X with its web upright (Z up): a sweep along a horizontal axis, and the cantilever of the README demo.
• cross-cylinders: Two orthogonal R10 cylinders joined: equal radii, so the intersection curves cross at two singular points.
• filleted-bracket: An 8 mm L-bracket with an R6 inside fillet and a hole through each leg: a blend beside holes.
• filleted-bracket-blocks: The filleted bracket split into 30 cells with SolidCraft's Split Body (three slabs across its width, the corner halved along its diagonal, an O-grid of four cells round each hole) so that every cell is a mapped block: conforming multi-block hex meshing.
• i-beam: A 200 mm I-beam with 3 mm flanges and a 2 mm web: a long sweepable prism with thin walls.
• loft-transition: A 40 mm square lofted to an R15 circle 50 mm above: a ruled free-form surface between unlike sections.
• perforated-plate: A 3 mm plate perforated by a 6 x 4 grid of 6 mm holes: genus 24 in a thin sheet.
• pinhole-block: A 50 mm block drilled through by sixteen 0.6 mm pinholes: features 80 times smaller than the part, genus 16.
• rounded-box: A 40 x 30 x 20 box with every edge rounded R3: cylinder and sphere blends meeting at the corners.
• shallow-groove: A block with a 0.5 mm deep groove cut by an R30 cylinder: groove walls 10 degrees off the top face.
• sharp-wedge: A wedge whose faces meet at under 3 degrees: a sharp edge with a needle-thin cross-section.
• sphere-on-plate: A sphere sunk 0.1 mm into a plate: the faces meet at under 6 degrees around a 2 mm circle.
• spline-vase: A vase revolved from a spline profile: doubly curved faces of varying curvature around a closed axis.
• stepped-block: Three stacked blocks with a slot cut through the base: axis-aligned steps for polycube and octree meshers.
• thin-ribs: A 4 mm plate carrying five 0.8 mm ribs 20 mm tall: thin walls standing on a thicker base.
• thin-wall-enclosure: An 80 x 60 x 40 box shelled to 1 mm walls, open on top: thin walls over a large span.
• analytic-sphere: Sphere r 20: curvature everywhere, no edges.
• analytic-torus: Torus 30/8: genus 1 with doubly curved faces and no edges.
• analytic-cylinder: Cylinder r 10, h 40: the round bar of beam and torsion checks.
• analytic-pipe: Thick-walled pipe 20/30, length 60: the Lamé cylinder.
• analytic-plate-hole: Plate 200 x 100 x 5 with a 20 mm hole: the Kirsch plate.