From c6eb8bf58c74904f43a90cfb899d1b292a58019a Mon Sep 17 00:00:00 2001
From: Evert Timberg <evert.timberg+github@gmail.com>
Date: Thu, 26 May 2016 20:02:46 -0400
Subject: [PATCH] Line points need always need to pivot after regardless of
 whether or not bezier points are updated. Bezier points should only be
 updated if the line tension is not 0.

---
 src/controllers/controller.line.js | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)

diff --git a/src/controllers/controller.line.js b/src/controllers/controller.line.js
index 4c692d5ab..ef3f2b65d 100644
--- a/src/controllers/controller.line.js
+++ b/src/controllers/controller.line.js
@@ -32,11 +32,12 @@ module.exports = function(Chart) {
 		addElementAndReset: function(index) {
 			var me = this;
 			var options = me.chart.options;
+			var meta = me.getMeta();
 
 			Chart.DatasetController.prototype.addElementAndReset.call(me, index);
 
 			// Make sure bezier control points are updated
-			if (options.showLines && options.elements.line.tension !== 0) {
+			if (options.showLines && meta.dataset._model.tension !== 0) {
 				me.updateBezierControlPoints();
 			}
 		},
@@ -92,9 +93,14 @@ module.exports = function(Chart) {
 				me.updateElement(points[i], i, reset);
 			}
 
-			if (options.showLines && lineElementOptions.tension !== 0) {
+			if (options.showLines && line._model.tension !== 0) {
 				me.updateBezierControlPoints();
 			}
+
+			// Now pivot the point for animation
+			for (i=0, ilen=points.length; i<ilen; ++i) {
+				points[i].pivot();
+			}
 		},
 
 		getPointBackgroundColor: function(point, index) {
@@ -244,9 +250,6 @@ module.exports = function(Chart) {
 				model.controlPointPreviousY = Math.max(Math.min(controlPoints.previous.y, area.bottom), area.top);
 				model.controlPointNextX = Math.max(Math.min(controlPoints.next.x, area.right), area.left);
 				model.controlPointNextY = Math.max(Math.min(controlPoints.next.y, area.bottom), area.top);
-
-				// Now pivot the point for animation
-				point.pivot();
 			}
 		},