Construction axes, points and planes from model geometry (SOLID ▸ CONSTRUCT): axes through a cylinder/cone/torus, perpendicular to a face at a point, through two planes, two points or an edge; points at a vertex, through two edges, three planes, at the centre of a circle/sphere/torus, at an edge and a plane, along a path; midplane, planes through two edges or three points, tangent to a face, along a path. References (doc::construct::GeoRef) keep picked faces and edges by persistent name and resolve on each evaluation (they follow the model); results live in ModelState.construct, in the component's frame; view::construction_axes/points/planes for the viewport; kernel::face_surface for a face's analytic surface

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

crates/kernel/src/offset.rs

@@ -14,7 +14,7 @@ use crate::body::{Body, Solid, from_p3, p3};
 use crate::{KernelError, Result, guard};
 
 #[derive(Clone, Copy, Debug)]
-enum Surf {
+pub(crate) enum Surf {
     /// Outward normal and offset: n·x = d.
     Plane { n: Vec3, d: f64 },
     /// Axis point and direction, radius; `convex` when the outward normal points away from
@@ -211,7 +211,7 @@ fn samples(f: &mt::Face) -> Vec<(Vec3, Vec3)> {
 }
 
 /// What surface a face lies on (planes and cylinders only).
-fn surf_of(f: &mt::Face, tol: f64) -> Option<Surf> {
+pub(crate) fn surf_of(f: &mt::Face, tol: f64) -> Option<Surf> {
     if let mt::Surface::Plane(pl) = f.oriented_surface() {
         let n = pl.normal();
         let n = Vec3::new(n.x, n.y, n.z).normalized()?;