Crate axiolid_construct 

Geometry generation from exact inputs into explicit mesh or focused analytic results.

Why this is its own crate

Everything here answers one question: given an exact profile and a path, what solid does that denote? Extrusion, revolution, the sweep families, lofting and half-space clipping are all the same problem with different path kinds, and they share one stitching implementation so that winding, hole orientation and cap pairing are decided once.

None of that needs an operation graph. These functions take geometry and return geometry; they do not walk a DAG, cache results, resolve node references, or dispatch to a backend. That is why they live here and not in axiolid-mesh-compile, which does all four.

The split matters beyond tidiness. A caller that wants a swept solid – a CAD front end, a test, a future exact B-rep generator – should not have to construct a SolidOperation graph and run a compiler to get one. Under the old layout that was the only way to reach this code.

Exact generation coverage

Broad sweep families still produce meshes by default, but exact generation is no longer a narrow slice. Every Profile variant extrudes exactly: rectangle (including through-holes), circle, ellipse, contour (with holes and arcs), section, centre-line, derived and composite. Revolution covers any profile that lowers to a contour, sweeping cylinders, cones, planar annuli and tori.

What still refuses is stated per call site and is about geometry the kernel cannot represent exactly rather than work not yet done – a partial turn, a section straddling the revolution axis, an offset with no same-kind result, a non-conformal transform. None of this implies general exact booleans.

Certified affine surface-pair arrangement remains the other focused analytic constructor.

Re-exports

pub use result::GeneratedGeometry;

pub use result::GenerationOutput;

pub use result::GenerationRequest;

pub use result::TessellationRequest;

pub use trimmed_intersection::split_surface_pair_certified;

pub use trimmed_intersection::CertifiedDualTrimmedSurfacePair3;

pub use trimmed_intersection::CertifiedSurfacePairSplit3;

pub use trimmed_intersection::CertifiedSurfacePairSplitOptions;

pub use trimmed_intersection::CertifiedTrimmedSurfacePair3;

pub use trimmed_intersection::EmbeddedFaceCurve;

pub use trimmed_intersection::SurfacePairMember;

pub use trimmed_intersection::SurfacePairSplitUnresolvedReason;

Modules

boolean_exact

Exact boolean over axis-aligned prisms (#66).

boolean_stepped

Stepped union of two coaxial prisms, as constant-section bands.

bounding

Bounding volumes of 3D point sets (#118): the minimum enclosing sphere and a containing oriented box.

center_line

Centre-line profiles: offset an open path into a closed boundary.

center_line_exact

Exact centre-line offsetting (ADR 0056).

contour_lower

Lower an arbitrary contour profile onto the arc-ring extruder (ADR 0053).

extrude

Linear extrusion of a triangulated profile into a closed solid.

feature

Chamfer and fillet on a straight vertical edge of an exact prism (#68).

fillet_variable

Variable-radius (tapered) fillet blends (ADR 0051).

half_space

Bounding an unbounded half-space against a finite boundary.

hull

Convex hull of a 3D point set, decided by certified predicates (#76).

loft

Lofting a sequence of station rings into a solid.

offset

Constant-distance offset and shelling of planar-faced solids (#78).

polyhedron

Exact boolean over general planar-faced solids (#77).

profile

Profile -> 2D polygon rings, then triangles.

profile_lower

Lower Derived and Composite profiles onto the concrete builders (ADR 0054).

result

Explicit output-model contracts for solid generation.

revolve

Revolution of a profile about an axis.

revolve_contour

General contour revolution (ADR 0059).

revolve_exact

Exact revolution for the profile families exact extrusion already covers.

section_lower

Lower parameterised structural sections into exact contours (ADR 0057).

sweep

The sweep families that place a profile along a path.

trimmed_intersection

Topology-aware integration of certified affine surface intersections.

Structs

Curve2Id

Typed handle into the exact B-rep 2D pcurve catalog.

Curve3Id

Typed handle into the exact B-rep 3D curve catalog.

ExactBRep

Owned, analytic boundary representation.

ExactBRepBuilder

Mutable assembly state that can only yield an ExactBRep after validation.

SurfaceId

Typed handle into the exact B-rep surface catalog.

Enums

ExactBRepError

Why exact B-rep assembly was refused.

Constants

BACKEND_ID

Identity these generators report in diagnostics.

Type Aliases

ExactTopology

Topology whose supports are typed references into ExactBRep catalogs.