Merge pull request #1088 from hannobraun/circle

Add `Circle::radius`

crates/fj-kernel/src/path.rs

@@ -172,7 +172,6 @@ fn approx_circle(
 ) -> Vec<ApproxPoint<1>> {
     let mut points = Vec::new();
 
-    let radius = circle.a().magnitude();
     let range = range.into();
 
     // To approximate the circle, we use a regular polygon for which
@@ -181,7 +180,11 @@ fn approx_circle(
     // and the circle. This is the same as the difference between
     // the circumscribed circle and the incircle.
 
-    let n = number_of_vertices_for_circle(tolerance, radius, range.length());
+    let n = number_of_vertices_for_circle(
+        tolerance,
+        circle.radius(),
+        range.length(),
+    );
 
     for i in 1..n {
         let angle = range.start().t

crates/fj-math/src/circle.rs

@@ -75,6 +75,11 @@ impl<const D: usize> Circle<D> {
         self.center
     }
 
+    /// Access the radius of the circle
+    pub fn radius(&self) -> Scalar {
+        self.a().magnitude()
+    }
+
     /// Access the vector that defines the starting point of the circle
     ///
     /// The point where this vector points from the circle center, is the zero