AI_Assistant/cad-editor
Watch
1
0
Fork
You've already forked cad-editor
 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

feat: implement OCS→WCS transform for Arc, Circle, and Line

Browse source 
Entities carrying a non-standard extrusion normal (normal ≠ (0,0,1)) were
rendered flat in the XY plane. The DXF arbitrary-axis algorithm is now
implemented in scene::transform::{ocs_axes, ocs_point_to_wcs} and applied
during tessellation of Arc, Circle, and Line so they render correctly on
tilted planes in 3D DXF files.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
This commit is contained in:
Hakan Seven 2026-05-02 17:13:42 +03:00
commit 674a94f756
4 changed files with 117 additions and 33 deletions
Download patch file Download diff file Expand all files Collapse all files

59
src/entities/circle.rs
View file

@ -16,38 +16,49 @@ fn to_truck(circle: &Circle) -> TruckEntity {
let cy = circle.center.y;
let cz = circle.center.z;
let r = circle.radius;
let right = builder::vertex(Point3::new(cx + r, cy, cz));
let left = builder::vertex(Point3::new(cx - r, cy, cz));
let top = Point3::new(cx, cy + r, cz);
let bot = Point3::new(cx, cy - r, cz);
let upper = builder::circle_arc(&right, &left, top);
let lower = builder::circle_arc(&left, &right, bot);
let normal = (circle.normal.x, circle.normal.y, circle.normal.z);
let (ax, ay) = crate::scene::transform::ocs_axes(normal);
let (cwx, cwy, cwz) = crate::scene::transform::ocs_point_to_wcs((cx, cy, cz), normal);
// Circle points in WCS: centre_wcs ± r * Ax and centre_wcs ± r * Ay
let pt = |da: (f64, f64, f64), db: (f64, f64, f64), s: f64| {
Point3::new(
cwx + s * da.0 + s * db.0,
cwy + s * da.1 + s * db.1,
cwz + s * da.2 + s * db.2,
)
};
// right: centre + r*Ax, left: centre - r*Ax, top: centre + r*Ay, bot: centre - r*Ay
let p_right = pt(ax, (0.0, 0.0, 0.0), r);
let p_left = pt((ax.0 * -1.0, ax.1 * -1.0, ax.2 * -1.0), (0.0, 0.0, 0.0), r);
let p_top = pt(ay, (0.0, 0.0, 0.0), r);
let p_bot = pt((ay.0 * -1.0, ay.1 * -1.0, ay.2 * -1.0), (0.0, 0.0, 0.0), r);
let right = builder::vertex(p_right);
let left = builder::vertex(p_left);
let upper = builder::circle_arc(&right, &left, p_top);
let lower = builder::circle_arc(&left, &right, p_bot);
let wire: Wire = [upper, lower].into_iter().collect();
let cv = Vec3::new(cx as f32, cy as f32, cz as f32);
let cv = Vec3::new(cwx as f32, cwy as f32, cwz as f32);
let rf = r as f32;
let q = |d: (f64, f64, f64)| Vec3::new(
(cwx + r * d.0) as f32,
(cwy + r * d.1) as f32,
(cwz + r * d.2) as f32,
);
TruckEntity {
object: TruckObject::Contour(wire),
snap_pts: vec![
(cv, SnapHint::Center),
(
Vec3::new(cx as f32 + rf, cy as f32, cz as f32),
SnapHint::Quadrant,
),
(
Vec3::new(cx as f32, cy as f32 + rf, cz as f32),
SnapHint::Quadrant,
),
(
Vec3::new(cx as f32 - rf, cy as f32, cz as f32),
SnapHint::Quadrant,
),
(
Vec3::new(cx as f32, cy as f32 - rf, cz as f32),
SnapHint::Quadrant,
),
(q(ax), SnapHint::Quadrant),
(q(ay), SnapHint::Quadrant),
(q((-ax.0, -ax.1, -ax.2)), SnapHint::Quadrant),
(q((-ay.0, -ay.1, -ay.2)), SnapHint::Quadrant),
],
tangent_geoms: vec![TangentGeom::Circle {
center: [cx as f32, cy as f32, cz as f32],
center: [cwx as f32, cwy as f32, cwz as f32],
radius: rf,
}],
key_vertices: vec![],