From 4f2c31bf25048a91bd71b7b9a2d599f3f0ba0cac Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Alexander=20Stillesj=C3=B6?=
 <alexander.stillesjo@umetrics.com>
Date: Thu, 2 Jun 2016 10:55:13 +0200
Subject: [PATCH] Only interpolate angles, not data, when updating label paths.

---
 src/pie-chart.js | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/pie-chart.js b/src/pie-chart.js
index e6c5bf527..69e935eac 100644
--- a/src/pie-chart.js
+++ b/src/pie-chart.js
@@ -214,8 +214,9 @@ dc.pieChart = function (parent, chartGroup) {
         polyline.exit().remove();
         dc.transition(polyline, _chart.transitionDuration())
             .attrTween('points', function (d) {
-                this._current = this._current || d;
-                var interpolate = d3.interpolate(this._current, d);
+                var current = this._current || d;
+                current = {startAngle: current.startAngle, endAngle: current.endAngle};
+                var interpolate = d3.interpolate(current, d);
                 this._current = interpolate(0);
                 return function (t) {
                     var arc2 = d3.svg.arc()