Coil (PrimitiveCoil: diameter, two of revolutions/height/pitch, circular or square section inside/on/outside, start angle, handedness) on a new kernel helical sweep; loft to a point (sketch point sections, pyramids); recipes: a sweep along a fitted 3D helix replays as a coil (oracle 49, compared within 0.5% since Fusion's path is a spline fit) and loft point sections (oracle 37)

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

crates/kernel/src/lib.rs

@@ -17,6 +17,7 @@ mod body;
 mod build;
 mod coplanar;
 mod heal;
+mod helix;
 mod loopblend;
 mod measure;
 mod meshbody;
@@ -31,6 +32,7 @@ mod topo;
 pub use blend::{chamfer, fillet};
 pub use body::{Body, EdgeInfo, FaceInfo};
 pub use build::{PathSeg, box_solid, cylinder, extrude, extrude_tapered, loft, revolve, sphere, sweep, torus};
+pub use helix::{loft_to_point, sweep_helix};
 pub use measure::{BodyMeasure, measure};
 pub use meshbody::{MAX_TRIANGLES, mesh_body};
 pub use ops::{BoolOp, boolean, split_by_plane, transform, transform_matrix};