From 1bacbc32e9ab25443e7fa07374fcb8684491df4d Mon Sep 17 00:00:00 2001
From: hkrish <hari.exeption@gmail.com>
Date: Sun, 29 Dec 2013 13:03:39 +0100
Subject: [PATCH] Link previous & next curves while returning monotone curves

---
 src/path/Path.js | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/src/path/Path.js b/src/path/Path.js
index 63fecfd9..41747448 100644
--- a/src/path/Path.js
+++ b/src/path/Path.js
@@ -1718,6 +1718,7 @@ var Path = PathItem.extend(/** @lends Path# */{
 	 */
 	_getMonotoneCurves: function() {
 		var monoCurves = this._monotoneCurves,
+			lastCurve,
 			// TODO: replace instances with constants ( /*#=*/ ?)
 			INCREASING = 1,
 			DECREASING = -1,
@@ -1733,7 +1734,13 @@ var Path = PathItem.extend(/** @lends Path# */{
 				} else if (y0 > y1) {
 					dir = DECREASING;
 				}
+				// Add a reference to subsequent curves
 				v.push(dir);
+				if (lastCurve) {
+					v[9] = lastCurve;
+					lastCurve[10] = v;
+				}
+				lastCurve = v;
 				monoCurves.push(v);
 			}
 			// Handle bezier curves. We need to chop them into smaller curves 
@@ -1785,7 +1792,11 @@ var Path = PathItem.extend(/** @lends Path# */{
 			}
 			for (i = 0, li = curves.length; i < li; i++) {
 				crv = curves[i];
+				// Filter out curves of zero length
 				vals = crv.getValues();
+				if (Curve.getLength(vals) === 0)
+					continue;
+				// Handle linear and cubic curves seperately
 				if (crv.isLinear()) {
 					insertValues(vals);
 				} else {
@@ -1799,6 +1810,10 @@ var Path = PathItem.extend(/** @lends Path# */{
 					}
 				}
 			}
+			// Link, first and last curves
+			lastCurve = monoCurves[monoCurves.length - 1];
+			monoCurves[0][9] = lastCurve;
+			lastCurve.push(monoCurves[0]);
 		}
 		return monoCurves;
 	},