use flattening on ellipses after nical/lyon#662

Cargo.lock

@@ -177,9 +177,9 @@ checksum = "e2abad23fbc42b3700f2f279844dc832adb2b2eb069b2df918f455c4e18cc646"
 
 [[package]]
 name = "libc"
-version = "0.2.95"
+version = "0.2.96"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "789da6d93f1b866ffe175afc5322a4d76c038605a1c3319bb57b06967ca98a36"
+checksum = "5600b4e6efc5421841a2138a6b082e07fe12f9aaa12783d50e5d13325b26b4fc"
 
 [[package]]
 name = "log"
@@ -192,9 +192,9 @@ dependencies = [
 
 [[package]]
 name = "lyon_geom"
-version = "0.17.1"
+version = "0.17.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d6b5d72694ade806440faf600defca6143dbe5499e90a9ec8caed62adbfd5db5"
+checksum = "1b63e4ad431a0d079d443e2f195d37ae062743886c73b83c1fd313bf1deec649"
 dependencies = [
  "arrayvec",
  "euclid",
@@ -458,9 +458,9 @@ dependencies = [
 
 [[package]]
 name = "syn"
-version = "1.0.72"
+version = "1.0.73"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a1e8cdbefb79a9a5a65e0db8b47b723ee907b7c7f8496c76a1770b5c310bab82"
+checksum = "f71489ff30030d2ae598524f61326b902466f72a0fb1a8564c001cc63425bcc7"
 dependencies = [
  "proc-macro2",
  "quote",

Cargo.toml

@@ -7,7 +7,7 @@ description = "Convert paths in SVG files to GCode for a pen plotter, laser engr
 
 [dependencies]
 g-code = "0.1.2"
-lyon_geom = "0"
+lyon_geom = ">= 0.17.2"
 euclid = "0.22"
 structopt = "0.3"
 log = "0"

src/turtle.rs

@@ -404,12 +404,10 @@ impl<'input> Turtle<'input> {
         let last_point = std::cell::Cell::new(self.current_position);
 
         let mut ellipse = vec![];
-        arc.for_each_cubic_bezier(&mut |cbs| {
+        arc.flattened(tolerance).for_each(|point| {
-            cbs.flattened(tolerance).for_each(|point| {
+            let point = self.current_transform.transform_point(point);
-                let point = self.current_transform.transform_point(point);
+            ellipse.append(&mut Self::linear_interpolation(point.x, point.y, z, f));
-                ellipse.append(&mut Self::linear_interpolation(point.x, point.y, z, f));
+            last_point.set(point);
-                last_point.set(point);
-            });
         });
 
         self.current_position = last_point.get();