Add points_line field to LineSegment

crates/fj-core/src/geometry/curves/circle.rs

@@ -43,7 +43,10 @@ impl<const D: usize> GenPolyline<D> for Circle<D> {
         let points = points_curve
             .map(|point_curve| self.point_from_circle_coords(point_curve));
 
-        LineSegment { points }
+        LineSegment {
+            points,
+            points_line: points_curve,
+        }
     }
 
     fn generate_polyline(

crates/fj-core/src/geometry/curves/line.rs

@@ -19,6 +19,7 @@ impl<const D: usize> GenPolyline<D> for Line<D> {
 
         LineSegment {
             points: [point, point],
+            points_line: [point_curve; 2],
         }
     }
 

crates/fj-math/src/line_segment.rs

@@ -13,6 +13,9 @@ use super::Point;
 pub struct LineSegment<const D: usize> {
     /// # The end points of the line segment
     pub points: [Point<D>; 2],
+
+    /// # The end points of the line segment, in line coordinates
+    pub points_line: [Point<1>; 2],
 }
 
 impl<const D: usize> LineSegment<D> {
@@ -50,6 +53,7 @@ where
     fn from(points: [P; 2]) -> Self {
         Self {
             points: points.map(Into::into),
+            points_line: [[0.], [1.]].map(Into::into),
         }
     }
 }