Exact profiles for splines of any degree (a degree-4…7 Bézier segment kind, Seg2::Bezier, extruded as B-spline edges) and for free-form curves cut by crossings (exact sub-curves whose ends are moved to the true crossing, found by Newton; polylines only where that fails)

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01AS5Tn3xieewUSg3uxrMVdL

crates/geom/src/lib.rs

@@ -13,7 +13,7 @@ mod vec;
 
 pub use mesh::{Aabb3, Mesh, MeshMeasure};
 pub use plane::Plane;
-pub use profile::{Loop2, Region2, Seg2};
+pub use profile::{Loop2, MAX_BEZIER_DEGREE, Region2, Seg2, bezier};
 pub use vec::{Vec2, Vec3};
 
 /// Geometric tolerance for coincidence tests (mm).