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Simplify projection into swept curve

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The new approach has the additional advantage that it's still going to
work with other curves besides lines.
This commit is contained in:
Hanno Braun 2025-04-09 11:46:31 +02:00
parent e988b2d119
commit 327b393441
1 changed files with 7 additions and 21 deletions
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28
experiments/2025-03-18/src/geometry/swept_curve.rs
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@ -13,22 +13,10 @@ impl SweptCurve {
Self { curve, path: c - a }
}
pub fn origin(&self) -> Point<3> {
self.curve.origin()
}
pub fn u(&self) -> Vector<3> {
self.curve.direction()
}
pub fn v(&self) -> Vector<3> {
self.path
}
pub fn normal(&self) -> Vector<3> {
self.u().cross(&self.v()).normalize()
}
pub fn point_from_local(&self, point: impl Into<Point<2>>) -> Point<3> {
let [u, v] = point.into().coords.components;
self.curve.point_from_local(Point::from([u])) + self.v() * v
@ -36,17 +24,15 @@ impl SweptCurve {
pub fn project_point(&self, point: impl Into<Point<3>>) -> Point<2> {
let point = point.into();
let origin_to_point = point - self.origin();
let min_distance_plane_to_point = origin_to_point.dot(&self.normal());
let point_in_plane =
point - self.normal() * min_distance_plane_to_point;
let origin_to_point_in_plane = point_in_plane - self.origin();
let u = self.curve.point_to_line_coords(point);
let v = {
let origin = self.curve.point_from_line_coords(u);
let line = Line::from_origin_and_direction(origin, self.path);
line.point_to_line_coords(point)
};
let u = origin_to_point_in_plane.dot(&self.u());
let v = origin_to_point_in_plane.dot(&self.v());
Point::from([u, v])
Point::from([u.t, v.t])
}
pub fn flip(&self) -> Self {