Derive Debug and Clone more

This will just make it easier to integrate this into things like
runebender.

src/hyperbezier.rs

@@ -34,6 +34,7 @@ use crate::util;
 /// A few observation. If both bias values are 1, then the curve is an Euler
 /// spiral. If both bias values are less than 1, then curvature is a cubic
 /// polynomial as a function of arclength, so it is a Spiro curve.
+#[derive(Copy, Clone, Debug)]
 pub struct HyperBezier {
     pub k0: f64,
     pub bias0: f64,
@@ -45,6 +46,7 @@ pub struct HyperBezier {
 ///
 /// Here, angles are given relative to the chord, but the bias parameters
 /// are the same as for `HyperBezier`.
+#[derive(Copy, Clone, Debug)]
 pub struct ThetaParams {
     pub th0: f64,
     pub bias0: f64,
@@ -57,7 +59,7 @@ pub struct ThetaParams {
 /// The `th0` and `th1` values are defined so that if they are have the
 /// same sign, the curve is convex, but if they are opposite signs, it is
 /// an "s" shape.
-#[derive(Copy, Clone)]
+#[derive(Copy, Clone, Debug)]
 pub struct HyperBezierResult {
     /// Tangent angle from the chord to the curve at the start point.
     pub th0: f64,
@@ -301,4 +303,4 @@ fn test_k() {
         assert!((k - actual_k).abs() < 1e-5);
         //println!("{}, {}, {}", k, bias, actual_k);
     }
-}
+}

src/spline.rs

@@ -9,6 +9,7 @@ use crate::util;
 /// The specification of a spline curve.
 ///
 /// Currently this represents a single subpath.
+#[derive(Clone, Debug)]
 pub struct SplineSpec {
     elements: Vec<Element>,
     is_closed: bool,
@@ -22,12 +23,14 @@ pub struct SplineSpec {
     segments: Vec<Segment>,
 }
 
+#[derive(Clone, Debug)]
 pub struct Spline {
     segments: Vec<Segment>,
     is_closed: bool,
 }
 
 /// A single spline segment.
+#[derive(Clone, Debug)]
 pub struct Segment {
     pub p0: Point,
     pub p1: Point,
@@ -46,6 +49,7 @@ pub struct Segment {
     ch: f64,
 }
 
+#[derive(Copy, Clone, Debug)]
 enum Element {
     MoveTo(Point),
     LineTo(Point, bool),