From 668b532fbee9dca9b75a5981aab949e7513a9388 Mon Sep 17 00:00:00 2001
From: Aaron Miller <me@aaron-miller.me>
Date: Sun, 13 Mar 2016 09:59:19 -0400
Subject: [PATCH] Add angleLineInterval option to radar chart

---
 docs/03-Radar-Chart.md | 5 ++++-
 src/Chart.Core.js      | 2 +-
 src/Chart.Radar.js     | 4 ++++
 3 files changed, 9 insertions(+), 2 deletions(-)

diff --git a/docs/03-Radar-Chart.md b/docs/03-Radar-Chart.md
index aff5a00db..35b3244e8 100644
--- a/docs/03-Radar-Chart.md
+++ b/docs/03-Radar-Chart.md
@@ -76,6 +76,9 @@ These are the customisation options specific to Radar charts. These options are
 	//Number - Pixel width of the angle line
 	angleLineWidth : 1,
 
+	//Number - Interval at which to draw angle lines ("every Nth point")
+	angleLineInterval: 1,
+      
 	//String - Point label font declaration
 	pointLabelFontFamily : "'Arial'",
 
@@ -174,4 +177,4 @@ Calling `removeData()` on your Chart instance will remove the first value for al
 ```javascript
 myRadarChart.removeData();
 // Other points will now animate to their correct positions.
-```
\ No newline at end of file
+```
diff --git a/src/Chart.Core.js b/src/Chart.Core.js
index 979a91b7c..3fb3b2ca4 100755
--- a/src/Chart.Core.js
+++ b/src/Chart.Core.js
@@ -2058,7 +2058,7 @@
 					for (var i = this.valuesCount - 1; i >= 0; i--) {
 						var centerOffset = null, outerPosition = null;
 
-						if (this.angleLineWidth > 0){
+						if (this.angleLineWidth > 0 && (i % this.angleLineInterval === 0)){
 							centerOffset = this.calculateCenterOffset(this.max);
 							outerPosition = this.getPointPosition(i, centerOffset);
 							ctx.beginPath();
diff --git a/src/Chart.Radar.js b/src/Chart.Radar.js
index 93d7352fd..c45e09761 100644
--- a/src/Chart.Radar.js
+++ b/src/Chart.Radar.js
@@ -28,6 +28,9 @@
 			//Number - Pixel width of the angle line
 			angleLineWidth : 1,
 
+			//Number - Interval at which to draw angle lines ("every Nth point")
+			angleLineInterval: 1,
+
 			//String - Point label font declaration
 			pointLabelFontFamily : "'Arial'",
 
@@ -181,6 +184,7 @@
 				lineColor: this.options.scaleLineColor,
 				angleLineColor : this.options.angleLineColor,
 				angleLineWidth : (this.options.angleShowLineOut) ? this.options.angleLineWidth : 0,
+        angleLineInterval: (this.options.angleLineInterval) ? this.options.angleLineInterval : 1,
 				// Point labels at the edge of each line
 				pointLabelFontColor : this.options.pointLabelFontColor,
 				pointLabelFontSize : this.options.pointLabelFontSize,
-- 
2.47.2