3D sketch curves (wires): Include 3D Geometry keeps out-of-plane edges and curves 3D; Project To Surface (curves onto a face along the sketch normal), Intersection Curve (bodies/faces), Isoparametric Curve (u/v or a direction), Spun Profile (a body's outline about an axis) and Fit Curves to Mesh Section; all linked and re-resolved; wires drawn, inspected and deletable
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01AS5Tn3xieewUSg3uxrMVdL
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@@ -11,6 +11,7 @@ mod eval;
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pub mod expr;
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mod params;
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pub mod project;
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mod project3d;
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pub use assembly::{IDENTITY, Mat, Occurrence, apply_point, apply_vector, is_identity, mat_inverse, mat_mul, rigid};
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pub use document::*;
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@@ -24,6 +24,8 @@ const MAX_CHAIN: usize = 4000;
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#[derive(Clone, Debug)]
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pub struct Resolved {
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pub geom: Vec<LinkGeom>,
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/// 3D curves (world coordinates).
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pub wires: Vec<Vec<Vec3>>,
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pub source: LinkSource,
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/// The reference was not exactly where it was and was re-found on the nearest geometry.
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pub moved: bool,
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@@ -34,6 +36,12 @@ pub fn resolve(doc: &Document, vals: &BTreeMap<String, Value>, st: &ModelState,
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let lost = |what: &str| DocError::Invalid(format!("{what} no longer exists"));
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let mut moved = false;
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let mut source = src.clone();
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let mut wires: Vec<Vec<Vec3>> = Vec::new();
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// Included curves that leave the sketch plane stay 3D.
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let off_plane = |pts: &[Vec3]| {
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let size = pts.iter().fold(1.0_f64, |m, p| m.max(p.len()));
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pts.iter().any(|p| plane.height(*p).abs() > size * 1e-7)
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};
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let geom = match src {
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LinkSource::Edge { body, at } => {
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let (bi, mesh) = body_mesh(st, body, *at)?;
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@@ -48,6 +56,10 @@ pub fn resolve(doc: &Document, vals: &BTreeMap<String, Value>, st: &ModelState,
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let pts = mesh.edges.get(e).cloned().unwrap_or_default();
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match kind {
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LinkKind::Intersect => section_of_polyline(plane, &pts),
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LinkKind::Include if off_plane(&pts) => {
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wires.push(pts);
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Vec::new()
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}
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_ => fit_world(plane, &pts),
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}
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}
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@@ -112,9 +124,58 @@ pub fn resolve(doc: &Document, vals: &BTreeMap<String, Value>, st: &ModelState,
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let pts: Vec<Vec3> = ss.sketch.segs(ci).iter().flat_map(|s| s.polyline(1e-3)).map(|p| ss.plane.to_world(p)).collect();
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section_of_polyline(plane, &pts)
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}
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LinkKind::Include => {
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let pts: Vec<Vec3> = ss.sketch.polyline(ci).iter().map(|p| ss.plane.to_world(*p)).collect();
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if off_plane(&pts) {
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wires.push(pts);
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Vec::new()
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} else {
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project_sketch_curve(&ss.sketch, &ss.plane, ci, plane)
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}
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}
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_ => project_sketch_curve(&ss.sketch, &ss.plane, ci, plane),
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}
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}
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LinkSource::OnSurface { sketch, curve, body, at } => {
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let ss = st.sketch(*sketch).ok_or_else(|| lost(&format!("sketch {sketch}")))?;
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let ci = ss.sketch.curve_index(curve).ok_or_else(|| lost(&format!("sketch curve {curve}")))?;
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let pts: Vec<Vec3> = ss.sketch.polyline(ci).iter().map(|p| ss.plane.to_world(*p)).collect();
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let (bi, mesh) = body_mesh(st, body, *at)?;
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let (f, q, d) = nearest_face(&mesh, *at).ok_or_else(|| lost("the face"))?;
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let size = mesh.bounds().diagonal().max(1e-9);
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if d > size * 0.25 {
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return Err(lost("the face"));
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}
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let name = st.bodies.get(bi).map(|b| b.name.clone()).unwrap_or_else(|| body.clone());
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source = LinkSource::OnSurface { sketch: *sketch, curve: curve.clone(), body: name, at: q };
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wires = crate::project3d::onto_face(&mesh, f, &pts, plane.normal());
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Vec::new()
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}
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LinkSource::Intersection { a, b } => {
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let (ma, fa) = crate::project3d::mesh_of(st, a).ok_or_else(|| lost(&a.describe()))?;
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let (mb, fb) = crate::project3d::mesh_of(st, b).ok_or_else(|| lost(&b.describe()))?;
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wires = crate::project3d::mesh_intersection(&ma, fa, &mb, fb);
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Vec::new()
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}
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LinkSource::Iso { body, at, dir } => {
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let (bi, mesh) = body_mesh(st, body, *at)?;
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let (f, q, d) = nearest_face(&mesh, *at).ok_or_else(|| lost("the face"))?;
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let size = mesh.bounds().diagonal().max(1e-9);
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if d > size * 0.25 {
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return Err(lost("the face"));
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}
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let name = st.bodies.get(bi).map(|b| b.name.clone()).unwrap_or_else(|| body.clone());
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source = LinkSource::Iso { body: name, at: q, dir: dir.clone() };
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wires = crate::project3d::iso_curve(&mesh, f, q, dir);
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Vec::new()
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}
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LinkSource::Spun { body, origin, dir } => {
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let b = st.body(body).ok_or_else(|| lost(&format!("body {body}")))?;
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let pts = crate::project3d::spun_outline(&b.mesh(), *origin, *dir, plane);
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let mut g = Vec::new();
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fit_chain(&pts, Some(b.mesh().bounds().diagonal().max(1e-9) * 2e-3), &mut g);
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g
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}
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LinkSource::SketchPoint { sketch, point } => {
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let ss = st.sketch(*sketch).ok_or_else(|| lost(&format!("sketch {sketch}")))?;
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let pi = ss.sketch.resolve_point(point).ok_or_else(|| lost(&format!("sketch point {point}")))?;
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@@ -144,10 +205,10 @@ pub fn resolve(doc: &Document, vals: &BTreeMap<String, Value>, st: &ModelState,
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plane_trace(plane, &other).into_iter().collect()
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}
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};
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if geom.is_empty() {
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if geom.is_empty() && wires.is_empty() {
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return Err(DocError::Invalid(format!("the {} projects to nothing on this sketch plane", src.describe())));
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}
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Ok(Resolved { geom: merge_split_circles(geom), source, moved })
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Ok(Resolved { geom: merge_split_circles(geom), wires, source, moved })
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}
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/// Re-resolve every link of a sketch (in place). Returns warnings for lost, moved or rebuilt
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@@ -159,6 +220,7 @@ pub fn refresh_links(doc: &Document, vals: &BTreeMap<String, Value>, st: &ModelS
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match resolve(doc, vals, st, plane, l.kind, &l.source) {
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Ok(r) => {
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sk.set_link_source(&l.id, r.source);
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let _ = sk.set_link_wires(&l.id, &r.wires);
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match sk.update_link(&l.id, &r.geom) {
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Ok(true) => warn.push(format!("projected {} changed shape and was rebuilt", l.source.describe())),
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Ok(false) if r.moved => warn.push(format!("projected {} was re-found on the nearest geometry", l.source.describe())),
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@@ -382,7 +444,7 @@ fn silhouette(plane: &Plane, m: &Mesh) -> Vec<LinkGeom> {
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}
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/// Section of a mesh (or one of its faces) with the sketch plane.
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fn section(plane: &Plane, m: &Mesh, face: Option<u32>) -> Vec<LinkGeom> {
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pub(crate) fn section(plane: &Plane, m: &Mesh, face: Option<u32>) -> Vec<LinkGeom> {
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let size = m.bounds().diagonal().max(1e-9);
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let q = size * 1e-7;
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let key = |p: Vec3| ((p.x / q).round() as i64, (p.y / q).round() as i64, (p.z / q).round() as i64);
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@@ -0,0 +1,409 @@
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//! 3D sketch curves from the model: curves projected onto faces, intersection curves of bodies
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//! and faces (on their display meshes), and spun profiles.
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use std::collections::BTreeMap;
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use std::sync::Arc;
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use solvecraft_geom::{Mesh, Plane, Vec2, Vec3};
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use solvecraft_sketch::LinkSource;
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use crate::eval::ModelState;
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/// Most triangle pairs examined by one intersection.
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const MAX_PAIRS: usize = 20_000_000;
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/// The mesh (and face, for a face source) of a body or face reference.
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pub(crate) fn mesh_of(st: &ModelState, src: &LinkSource) -> Option<(Arc<Mesh>, Option<u32>)> {
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match src {
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LinkSource::Body { body } => Some((st.body(body)?.mesh(), None)),
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LinkSource::Face { body, at } => {
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let b = st.body(body).or_else(|| st.bodies.iter().min_by(|x, y| dist_to(&x.mesh(), *at).total_cmp(&dist_to(&y.mesh(), *at))))?;
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let m = b.mesh();
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let (f, _, _) = crate::project::nearest_face(&m, *at)?;
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Some((m, Some(f)))
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}
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_ => None,
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}
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}
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fn dist_to(m: &Mesh, p: Vec3) -> f64 {
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crate::project::nearest_face(m, p).map(|x| x.2).unwrap_or(f64::INFINITY)
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}
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fn tris(m: &Mesh, face: Option<u32>) -> Vec<[Vec3; 3]> {
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m.triangles.iter().zip(&m.tri_face).filter(|(_, f)| face.is_none_or(|x| x == **f)).filter_map(|(t, _)| m.tri(t)).collect()
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}
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/// Ray–triangle hit parameter (Möller–Trumbore), any sign.
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fn ray_hit(o: Vec3, d: Vec3, t: &[Vec3; 3]) -> Option<f64> {
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let (e1, e2) = (t[1] - t[0], t[2] - t[0]);
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let p = d.cross(e2);
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let det = e1.dot(p);
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if det.abs() < 1e-14 {
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return None;
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}
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let inv = 1.0 / det;
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let s = o - t[0];
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let u = s.dot(p) * inv;
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if !(-1e-9..=1.0 + 1e-9).contains(&u) {
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return None;
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}
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let q = s.cross(e1);
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let v = d.dot(q) * inv;
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if v < -1e-9 || u + v > 1.0 + 1e-9 {
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return None;
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}
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Some(e2.dot(q) * inv)
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}
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/// Project a world polyline onto face `f` along `dir` (either way, nearest hit). Points that
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/// miss the face split the result.
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pub(crate) fn onto_face(m: &Mesh, f: u32, pts: &[Vec3], dir: Vec3) -> Vec<Vec<Vec3>> {
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let Some(d) = dir.normalized() else { return Vec::new() };
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let ts = tris(m, Some(f));
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let size = m.bounds().diagonal().max(1e-9);
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// Resample so the projected curve follows the surface.
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let step = size / 200.0;
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let mut dense: Vec<Vec3> = Vec::new();
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for w in pts.windows(2) {
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let (a, b) = (w[0], w[1]);
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let n = ((a.dist(b) / step).ceil() as usize).clamp(1, 2000);
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for i in 0..n {
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dense.push(a.lerp(b, i as f64 / n as f64));
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}
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if dense.len() > 200_000 {
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break;
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}
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}
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if let Some(l) = pts.last() {
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dense.push(*l);
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}
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let mut out: Vec<Vec<Vec3>> = Vec::new();
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let mut cur: Vec<Vec3> = Vec::new();
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for p in dense {
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let hit = ts.iter().filter_map(|t| ray_hit(p, d, t)).min_by(|a, b| a.abs().total_cmp(&b.abs()));
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match hit {
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Some(t) => cur.push(p + d * t),
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None => {
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if cur.len() >= 2 {
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out.push(std::mem::take(&mut cur));
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} else {
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cur.clear();
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}
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}
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}
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}
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if cur.len() >= 2 {
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out.push(cur);
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}
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out
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}
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/// Segment where two triangles cross (None when they do not, or are coplanar).
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fn tri_tri(a: &[Vec3; 3], b: &[Vec3; 3]) -> Option<(Vec3, Vec3)> {
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let nb = (b[1] - b[0]).cross(b[2] - b[0]).normalized()?;
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let na = (a[1] - a[0]).cross(a[2] - a[0]).normalized()?;
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// Points where one triangle's edges pass through the other's plane.
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let cut = |t: &[Vec3; 3], n: Vec3, o: Vec3| -> Option<(Vec3, Vec3)> {
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let h: Vec<f64> = t.iter().map(|p| (*p - o).dot(n)).collect();
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if h.iter().all(|x| *x > 1e-12) || h.iter().all(|x| *x < -1e-12) {
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return None;
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}
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let mut pts = Vec::new();
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for (i, j) in [(0usize, 1usize), (1, 2), (2, 0)] {
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let (hi, hj) = (h[i], h[j]);
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if (hi > 0.0) != (hj > 0.0) {
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pts.push(t[i].lerp(t[j], hi / (hi - hj)));
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} else if hi == 0.0 {
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pts.push(t[i]);
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}
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}
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match pts[..] {
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[p, q, ..] => Some((p, q)),
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_ => None,
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}
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};
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if na.cross(nb).len() < 1e-9 {
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return None;
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}
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let (a0, a1) = cut(a, nb, b[0])?;
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let (b0, b1) = cut(b, na, a[0])?;
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// Overlap of the two segments on the common line.
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let dir = na.cross(nb);
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let pr = |p: Vec3| p.dot(dir);
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let (sa0, sa1) = if pr(a0) <= pr(a1) { (a0, a1) } else { (a1, a0) };
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let (sb0, sb1) = if pr(b0) <= pr(b1) { (b0, b1) } else { (b1, b0) };
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let lo = if pr(sa0) >= pr(sb0) { sa0 } else { sb0 };
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let hi = if pr(sa1) <= pr(sb1) { sa1 } else { sb1 };
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(pr(hi) - pr(lo) > 1e-12).then_some((lo, hi))
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}
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/// Where two meshes (or faces of them) meet, as polylines.
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pub(crate) fn mesh_intersection(ma: &Mesh, fa: Option<u32>, mb: &Mesh, fb: Option<u32>) -> Vec<Vec<Vec3>> {
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let (ta, tb) = (tris(ma, fa), tris(mb, fb));
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let bbox = |t: &[Vec3; 3]| (t[0].min(t[1]).min(t[2]), t[0].max(t[1]).max(t[2]));
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// Uniform grid over B.
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let lo = tb.iter().fold(Vec3::new(f64::INFINITY, f64::INFINITY, f64::INFINITY), |m, t| m.min(bbox(t).0));
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let hi = tb.iter().fold(Vec3::new(f64::NEG_INFINITY, f64::NEG_INFINITY, f64::NEG_INFINITY), |m, t| m.max(bbox(t).1));
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if !(lo.is_finite() && hi.is_finite()) {
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return Vec::new();
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}
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let n = ((tb.len() as f64).cbrt().ceil() as usize).clamp(1, 48);
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let ext = hi - lo;
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let cell = |p: Vec3| -> [usize; 3] {
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let f = |v: f64, l: f64, e: f64| if e > 1e-12 { (((v - l) / e) * n as f64).floor().clamp(0.0, (n - 1) as f64) as usize } else { 0 };
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[f(p.x, lo.x, ext.x), f(p.y, lo.y, ext.y), f(p.z, lo.z, ext.z)]
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};
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let mut grid: BTreeMap<[usize; 3], Vec<usize>> = BTreeMap::new();
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for (i, t) in tb.iter().enumerate() {
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let (b0, b1) = bbox(t);
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let (c0, c1) = (cell(b0), cell(b1));
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for x in c0[0]..=c1[0] {
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for y in c0[1]..=c1[1] {
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for z in c0[2]..=c1[2] {
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grid.entry([x, y, z]).or_default().push(i);
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}
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}
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}
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}
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let mut segs: Vec<(Vec3, Vec3)> = Vec::new();
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let mut pairs = 0usize;
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for t in &ta {
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let (b0, b1) = bbox(t);
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if b1.x < lo.x || b1.y < lo.y || b1.z < lo.z || b0.x > hi.x || b0.y > hi.y || b0.z > hi.z {
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continue;
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}
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let (c0, c1) = (cell(b0), cell(b1));
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let mut cand: Vec<usize> = Vec::new();
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for x in c0[0]..=c1[0] {
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for y in c0[1]..=c1[1] {
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for z in c0[2]..=c1[2] {
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if let Some(v) = grid.get(&[x, y, z]) {
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cand.extend(v);
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}
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}
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}
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}
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cand.sort_unstable();
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cand.dedup();
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for j in cand {
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pairs += 1;
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if pairs > MAX_PAIRS {
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break;
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}
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if let Some(u) = tb.get(j)
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&& let Some(sg) = tri_tri(t, u)
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{
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segs.push(sg);
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}
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}
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}
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chain3(&segs, ma.bounds().diagonal().max(mb.bounds().diagonal()).max(1e-9))
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}
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/// Chain 3D segments into polylines by shared end points.
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fn chain3(segs: &[(Vec3, Vec3)], size: f64) -> Vec<Vec<Vec3>> {
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let q = size * 1e-7;
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let key = |p: Vec3| ((p.x / q).round() as i64, (p.y / q).round() as i64, (p.z / q).round() as i64);
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let mut adj: BTreeMap<(i64, i64, i64), (Vec3, Vec<usize>)> = BTreeMap::new();
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let mut uniq: Vec<((i64, i64, i64), (i64, i64, i64))> = Vec::new();
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let mut seen = std::collections::BTreeSet::new();
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for (a, b) in segs {
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let (ka, kb) = (key(*a), key(*b));
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if ka == kb {
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continue;
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}
|
||||
let k = if ka <= kb { (ka, kb) } else { (kb, ka) };
|
||||
if !seen.insert(k) {
|
||||
continue;
|
||||
}
|
||||
let i = uniq.len();
|
||||
uniq.push(k);
|
||||
adj.entry(ka).or_insert_with(|| (*a, Vec::new())).1.push(i);
|
||||
adj.entry(kb).or_insert_with(|| (*b, Vec::new())).1.push(i);
|
||||
}
|
||||
let mut used = vec![false; uniq.len()];
|
||||
let mut out = Vec::new();
|
||||
let starts: Vec<(i64, i64, i64)> = adj.iter().filter(|(_, v)| v.1.len() != 2).map(|(k, _)| *k).chain(adj.keys().copied()).collect();
|
||||
for s in starts {
|
||||
while let Some(first) = adj.get(&s).and_then(|v| v.1.iter().copied().find(|e| !used.get(*e).copied().unwrap_or(true))) {
|
||||
let mut chain = vec![adj.get(&s).map(|v| v.0).unwrap_or_default()];
|
||||
let mut cur = s;
|
||||
let mut e = first;
|
||||
loop {
|
||||
if let Some(u) = used.get_mut(e) {
|
||||
*u = true;
|
||||
}
|
||||
let Some(&(ka, kb)) = uniq.get(e) else { break };
|
||||
cur = if ka == cur { kb } else { ka };
|
||||
chain.push(adj.get(&cur).map(|v| v.0).unwrap_or_default());
|
||||
let Some(next) = adj
|
||||
.get(&cur)
|
||||
.and_then(|v| if v.1.len() == 2 { v.1.iter().copied().find(|x| !used.get(*x).copied().unwrap_or(true)) } else { None })
|
||||
else {
|
||||
break;
|
||||
};
|
||||
e = next;
|
||||
}
|
||||
if chain.len() >= 2 {
|
||||
out.push(chain);
|
||||
}
|
||||
}
|
||||
}
|
||||
out
|
||||
}
|
||||
|
||||
/// Outline of a body spun about the axis `origin + t·dir`: the largest distance from the axis
|
||||
/// at each station along it, laid into the sketch plane on the side of the axis the plane's
|
||||
/// in-plane perpendicular points to.
|
||||
pub(crate) fn spun_outline(m: &Mesh, origin: Vec3, dir: Vec3, plane: &Plane) -> Vec<Vec2> {
|
||||
let Some(d) = dir.normalized() else { return Vec::new() };
|
||||
let Some(u) = plane.normal().cross(d).normalized() else { return Vec::new() };
|
||||
let ax = |p: Vec3| (p - origin).dot(d);
|
||||
let rad = |p: Vec3| {
|
||||
let v = p - origin;
|
||||
(v - d * v.dot(d)).len()
|
||||
};
|
||||
let (t0, t1) = m.positions.iter().fold((f64::INFINITY, f64::NEG_INFINITY), |(a, b), p| (a.min(ax(*p)), b.max(ax(*p))));
|
||||
if !(t0.is_finite() && t1 > t0) {
|
||||
return Vec::new();
|
||||
}
|
||||
let n = 240;
|
||||
let mut out = Vec::new();
|
||||
for i in 0..=n {
|
||||
let t = t0 + (t1 - t0) * i as f64 / n as f64;
|
||||
let mut r = f64::NEG_INFINITY;
|
||||
for tri in &m.triangles {
|
||||
let Some(p) = m.tri(tri) else { continue };
|
||||
for (a, b) in [(p[0], p[1]), (p[1], p[2]), (p[2], p[0])] {
|
||||
let (ha, hb) = (ax(a) - t, ax(b) - t);
|
||||
if ha.abs() < 1e-12 {
|
||||
r = r.max(rad(a));
|
||||
}
|
||||
if (ha > 0.0) != (hb > 0.0) && (ha - hb).abs() > 1e-15 {
|
||||
r = r.max(rad(a.lerp(b, ha / (ha - hb))));
|
||||
}
|
||||
}
|
||||
}
|
||||
if r.is_finite() {
|
||||
out.push(plane.to_local(origin + d * t + u * r));
|
||||
}
|
||||
}
|
||||
out
|
||||
}
|
||||
|
||||
/// An isoparametric curve of face `f` through `p`: the face cut by a plane through `p`. For
|
||||
/// curved faces `u` runs around (the plane across the face's straight direction, e.g. a
|
||||
/// cylinder's axis) and `v` along it; planar faces use the face plane's own axes. An explicit
|
||||
/// direction `"x,y,z"` cuts along it.
|
||||
pub(crate) fn iso_curve(m: &Mesh, f: u32, p: Vec3, dir: &str) -> Vec<Vec<Vec3>> {
|
||||
let ns: Vec<Vec3> = m
|
||||
.triangles
|
||||
.iter()
|
||||
.zip(&m.tri_face)
|
||||
.filter(|(_, x)| **x == f)
|
||||
.filter_map(|(t, _)| m.tri(t))
|
||||
.filter_map(|t| (t[1] - t[0]).cross(t[2] - t[0]).normalized())
|
||||
.collect();
|
||||
let Some(n0) = crate::project::nearest_face(m, p).and_then(|_| ns.first().copied()) else { return Vec::new() };
|
||||
// Normal at p: of the nearest triangle of the face.
|
||||
let np = m
|
||||
.triangles
|
||||
.iter()
|
||||
.zip(&m.tri_face)
|
||||
.filter(|(_, x)| **x == f)
|
||||
.filter_map(|(t, _)| m.tri(t))
|
||||
.min_by(|a, b| tri_dist(p, a).total_cmp(&tri_dist(p, b)))
|
||||
.and_then(|t| (t[1] - t[0]).cross(t[2] - t[0]).normalized())
|
||||
.unwrap_or(n0);
|
||||
// The face's straight direction: perpendicular to how its normals vary.
|
||||
let straight = ns.iter().map(|n| np.cross(*n)).filter(|c| c.len() > 1e-3).fold(None::<Vec3>, |acc, c| match acc {
|
||||
None => c.normalized(),
|
||||
Some(a) => (a + if a.dot(c) < 0.0 { -c } else { c }).normalized(),
|
||||
});
|
||||
let along = match dir.trim().to_ascii_lowercase().as_str() {
|
||||
"u" | "v" => {
|
||||
let s = straight.unwrap_or_else(|| Plane::from_normal(p, np).map(|pl| pl.x).unwrap_or(Vec3::X));
|
||||
if dir.trim().eq_ignore_ascii_case("v") { s } else { np.cross(s) }
|
||||
}
|
||||
other => {
|
||||
let v: Vec<f64> = other.split([',', ' ']).filter_map(|x| x.trim().parse().ok()).collect();
|
||||
match v[..] {
|
||||
[x, y, z] => Vec3::new(x, y, z),
|
||||
_ => return Vec::new(),
|
||||
}
|
||||
}
|
||||
};
|
||||
// Cutting plane through p containing the face normal and the curve direction.
|
||||
let Some(cut_n) = np.cross(along).normalized() else { return Vec::new() };
|
||||
// Nudged off the point so the cut does not run exactly along mesh edges (a seam); the side
|
||||
// that cuts more of the face wins.
|
||||
let nudge = m.bounds().diagonal().max(1e-9) * 1e-8;
|
||||
let cut = |off: f64| -> Vec<Vec<Vec3>> {
|
||||
let Some(pl) = Plane::from_normal(p + cut_n * off, cut_n) else { return Vec::new() };
|
||||
let geom = crate::project::section(&pl, m, Some(f));
|
||||
let pieces: Vec<Vec<Vec3>> =
|
||||
geom.iter().map(|g| link_polyline(g).into_iter().map(|q| pl.to_world(q)).collect()).filter(|w: &Vec<Vec3>| w.len() >= 2).collect();
|
||||
join_wires(pieces, m.bounds().diagonal().max(1e-9) * 1e-6)
|
||||
};
|
||||
let len = |ws: &Vec<Vec<Vec3>>| ws.iter().flat_map(|w| w.windows(2).map(|x| x[0].dist(x[1]))).sum::<f64>();
|
||||
let (a, b) = (cut(nudge), cut(-nudge));
|
||||
if len(&a) >= len(&b) { a } else { b }
|
||||
}
|
||||
|
||||
/// Join polylines whose ends meet into longer ones.
|
||||
fn join_wires(mut ws: Vec<Vec<Vec3>>, tol: f64) -> Vec<Vec<Vec3>> {
|
||||
let mut out: Vec<Vec<Vec3>> = Vec::new();
|
||||
while let Some(mut cur) = ws.pop() {
|
||||
let mut grew = true;
|
||||
while grew {
|
||||
grew = false;
|
||||
for i in 0..ws.len() {
|
||||
let (Some(cs), Some(ce)) = (cur.first().copied(), cur.last().copied()) else { break };
|
||||
let (Some(ws0), Some(we)) = (ws[i].first().copied(), ws[i].last().copied()) else { continue };
|
||||
let mut w = if ce.dist(ws0) < tol || cs.dist(we) < tol || ce.dist(we) < tol || cs.dist(ws0) < tol { ws.remove(i) } else { continue };
|
||||
if ce.dist(ws0) < tol {
|
||||
cur.extend(w.drain(1..));
|
||||
} else if ce.dist(we) < tol {
|
||||
w.reverse();
|
||||
cur.extend(w.drain(1..));
|
||||
} else if cs.dist(we) < tol {
|
||||
w.extend(cur.drain(1..));
|
||||
cur = w;
|
||||
} else {
|
||||
w.reverse();
|
||||
w.extend(cur.drain(1..));
|
||||
cur = w;
|
||||
}
|
||||
grew = true;
|
||||
break;
|
||||
}
|
||||
}
|
||||
out.push(cur);
|
||||
}
|
||||
out
|
||||
}
|
||||
|
||||
fn tri_dist(p: Vec3, t: &[Vec3; 3]) -> f64 {
|
||||
let c = (t[0] + t[1] + t[2]) / 3.0;
|
||||
c.dist(p)
|
||||
}
|
||||
|
||||
/// Sample a fitted planar curve.
|
||||
fn link_polyline(g: &solvecraft_sketch::LinkGeom) -> Vec<Vec2> {
|
||||
use solvecraft_sketch::LinkGeom;
|
||||
match *g {
|
||||
LinkGeom::Line(a, b) => vec![a, b],
|
||||
LinkGeom::Circle(c, r) => (0..=96).map(|i| c + Vec2::from_angle(i as f64 / 96.0 * std::f64::consts::TAU) * r).collect(),
|
||||
LinkGeom::Arc { c, a, b } => {
|
||||
let (s0, mut sw) = ((a - c).angle(), (b - c).angle() - (a - c).angle());
|
||||
while sw <= 1e-12 {
|
||||
sw += std::f64::consts::TAU;
|
||||
}
|
||||
let r = c.dist(a);
|
||||
(0..=48).map(|i| c + Vec2::from_angle(s0 + sw * i as f64 / 48.0) * r).collect()
|
||||
}
|
||||
LinkGeom::Conic { a, apex, b, rho } => (0..=32).map(|i| solvecraft_sketch::conic_point(a, apex, b, rho, i as f64 / 32.0)).collect(),
|
||||
LinkGeom::Point(_) => Vec::new(),
|
||||
}
|
||||
}
|
||||
Reference in new issue
Block a user