From 5f876adc1c57f2779ffe1ef552890d48f4b2cf89 Mon Sep 17 00:00:00 2001
From: sapics <gv.nishino@gmail.com>
Date: Fri, 8 Jan 2016 11:15:10 +0900
Subject: [PATCH] Replace atan to atan2 for avoiding NaN

---
 src/path/Path.js | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/path/Path.js b/src/path/Path.js
index 2bf39b61..b0528a5f 100644
--- a/src/path/Path.js
+++ b/src/path/Path.js
@@ -2836,10 +2836,10 @@ statics: {
         var sin = Math.sin(phi),
             cos = Math.cos(phi),
             tan = Math.tan(phi),
-            tx = -Math.atan(b * tan / a),
-            ty = Math.atan(b / (tan * a));
+            tx = Math.atan2(b * tan, a),
+            ty = Math.atan2(b, tan * a);
         // Due to symetry, we don't need to cycle through pi * n solutions:
-        return [Math.abs(a * Math.cos(tx) * cos - b * Math.sin(tx) * sin),
+        return [Math.abs(a * Math.cos(tx) * cos + b * Math.sin(tx) * sin),
                 Math.abs(b * Math.sin(ty) * cos + a * Math.cos(ty) * sin)];
     },