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
bent-tube	sweepable, thin-wall, genus	1	18	4296	0.121	428	4213.1	4159.4	1.3e-2	4159.8	ok, 2148 vertices	1	268	11.8	15550	2338	0	pass	598	sweep	192	0.859	0.997	62
bolted-assembly	assembly, blocky	3	22	284	0.117	53	33004.7	32999.0	1.7e-4	32998.9	ok, 144 vertices	0, 1, 1	104	0.7	690	181	0	pass	33	extrude	357	0.398	0.222	40
cantilever-i-beam	sweepable, thin-wall	1	14	44	0.208	4	61600.0	61600.0	0.0e0	61600.0	ok, 24 vertices	0	36	0.1	90	24	0	pass	3	extrude	336	0.707	0.707	33
cross-cylinders	boolean, sharp	1	10	1395	0.087	10640	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; …
filleted-bracket	fillet, genus, sweepable	1	13	540	0.088	494	32162.3	32145.0	5.4e-4	32144.8	ok, 268 vertices	2	135	1.7	5582	1613	0	pass	233	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
filleted-bracket-blocks	fillet, genus, partitioned	30	190	712	0.088	1057	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	1.7	1423	349	0	pass	64	blocks (30 cells, 45 shared faces)	4986	0.705	0.705	1440
i-beam	sweepable, thin-wall	1	14	44	0.208	234	61600.0	61600.0	0.0e0	61600.0	ok, 24 vertices	0	36	0.3	94	24	0	pass	8	extrude	336	0.707	0.707	74
loft-transition	organic	1	6	292	0.075	493	56390.2	56450.6	-1.1e-3	–	ok, 148 vertices	0	40	1.5	1329	256	1	pass	80	sweep	2873	0.189	0.189	892
perforated-plate	genus, thin-wall, sweepable	1	54	1644	0.144	2861	26822.2	26764.6	2.2e-3	26764.2	ok, 776 vertices	24	828	10.6	33611	9798	0	pass	7636	extrude	467	0.304	0.033	555
pinhole-block	small-feature, genus	1	38	4044	0.073	4821	49919.4	49909.6	2.0e-4	49909.5	ok, 1992 vertices	16	1548	29.3	96411	30221	0	pass	23460	extrude	5236	0.408	0.392	1853
rounded-box	fillet	1	26	2540	0.054	1822	23325.7	23340.5	-6.3e-4	23340.8	ok, 1272 vertices	0	216	15.1	11687	1921	0	pass	1081	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				37
shallow-groove	near-tangent, boolean	1	8	62	0.075	266	47795.2	47782.3	2.7e-4	47781.5	ok, 33 vertices	0	24	0.4	267	87	0	pass	27	extrude	1960	0.991	0.986	500
sharp-wedge	sharp, thin-wall, sweepable	1	5	8	0.083	143	3200.0	3200.0	0.0e0	3200.0	ok, 6 vertices	0	9	0.0	11	3	0	pass	1	extrude	294	0.050	0.050	67
sphere-on-plate	near-tangent, boolean	1	12	2826	0.098	3307	69353.3	69509.0	-2.2e-3	69509.7	ok, 1415 vertices	0	124	15.4	4898	309	9	pass	736	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				55
spline-vase	organic	1	11	3890	0.106	1175	94891.2	94948.5	-6.0e-4	–	ok, 1947 vertices	0	243	20.5	12461	1512	0	pass	2093	sweep	4554	0.649	0.649	846
stepped-block	blocky, sharp	1	14	96	0.078	32	47000.0	47000.0	0.0e0	47000.0	ok, 48 vertices	1	60	0.5	223	41	0	pass	8	extrude	1416	0.999	0.999	158
thin-ribs	thin-wall, blocky	1	26	92	0.119	68	32000.0	32000.0	-4.5e-16	32000.0	ok, 48 vertices	0	72	0.6	171	33	0	pass	8	extrude	777	0.844	0.844	86
thin-wall-enclosure	thin-wall, blocky	1	11	36	0.108	9	15564.0	15564.0	0.0e0	15564.0	ok, 20 vertices	0	28	0.1	191	47	2	pass	6	extrude	894	0.297	0.297	100
analytic-sphere	analytic	1	6	2784	0.069	284	33353.4	33507.9	-4.6e-3	33510.3	ok, 1394 vertices	0	96	7.0	4211	58	0	pass	358	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				35
analytic-torus	analytic, genus	1	6	7230	0.109	627	37644.1	37893.7	-6.6e-3	37899.3	ok, 3615 vertices	1	180	30.0	19790	466	0	pass	1091	revolve	1134	0.706	0.706	210
analytic-cylinder	analytic, sweepable	1	4	1004	0.049	32	12533.1	12564.7	-2.5e-3	12566.4	ok, 504 vertices	0	106	3.4	7437	1568	0	pass	344	extrude	3200	0.707	0.707	409
analytic-pipe	analytic, genus, sweepable	1	6	1448	0.104	51	94150.9	94238.0	-9.3e-4	94247.8	ok, 724 vertices	1	220	4.5	6238	1340	0	pass	327	extrude	1288	0.998	0.998	176
analytic-plate-hole	analytic, genus, sweepable	1	8	112	0.224	13	98449.1	98429.5	2.0e-4	98429.2	ok, 56 vertices	1	62	0.5	1868	543	0	pass	69	extrude	321	0.320	0.142	49

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.