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
bent-tube	sweepable, thin-wall, genus	1	18	4296	0.121	443	4213.1	4159.4	1.3e-2	4159.8
bolted-assembly	assembly, blocky	3	22	284	0.117	53	33004.7	32999.0	1.7e-4	32998.9
cross-cylinders	boolean, sharp	1	10	1395	0.087	7912	32197.4	32357.8	-5.0e-3	32365.8
filleted-bracket	fillet, genus, sweepable	1	13	540	0.088	387	32162.3	32145.0	5.4e-4	32144.8
i-beam	sweepable, thin-wall	1	14	44	0.208	3	61600.0	61600.0	0.0e0	61600.0
loft-transition	organic	1	6	292	0.075	56	56390.2	56450.6	-1.1e-3	–
perforated-plate	genus, thin-wall, sweepable	1	54	1644	0.144	269	26822.2	26764.6	2.2e-3	26764.2
pinhole-block	small-feature, genus	1	38	4044	0.073	203	49919.4	49909.6	2.0e-4	49909.5
rounded-box	fillet	1	26	2540	0.054	148	23325.7	23340.5	-6.3e-4	23340.8
shallow-groove	near-tangent, boolean	1	8	62	0.075	11	47795.2	47782.3	2.7e-4	47781.5
sharp-wedge	sharp, thin-wall, sweepable	1	5	8	0.083	2	3200.0	3200.0	0.0e0	3200.0
sphere-on-plate	near-tangent, boolean	1	12	2826	0.098	687	69353.3	69509.0	-2.2e-3	69509.7
spline-vase	organic	1	11	3890	0.106	218	94891.2	94948.5	-6.0e-4	–
stepped-block	blocky, sharp	1	14	96	0.078	32	47000.0	47000.0	0.0e0	47000.0
thin-ribs	thin-wall, blocky	1	26	92	0.119	65	32000.0	32000.0	-4.5e-16	32000.0
thin-wall-enclosure	thin-wall, blocky	1	11	36	0.108	8	15564.0	15564.0	0.0e0	15564.0
analytic-sphere	analytic	1	6	2784	0.069	248	33353.4	33507.9	-4.6e-3	33510.3
analytic-torus	analytic, genus	1	6	7230	0.109	338	37644.1	37893.7	-6.6e-3	37899.3
analytic-cylinder	analytic, sweepable	1	4	1004	0.049	25	12533.1	12564.7	-2.5e-3	12566.4
analytic-pipe	analytic, genus, sweepable	1	6	1448	0.104	42	94150.9	94238.0	-9.3e-4	94247.8
analytic-plate-hole	analytic, genus, sweepable	1	8	112	0.224	11	98449.1	98429.5	2.0e-4	98429.2

Categories

category	stresses	parts
thin-wall	walls thin against the part's size	6
small-feature	features much smaller than the part	1
fillet	blends between faces	2
genus	through holes (genus > 0)	7
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)	8
blocky	axis-aligned blocks (polycube-friendly)	4
organic	free-form, lofted or revolved spline surfaces	2
assembly	several bodies placed by component transforms	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.
• 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.
• 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.