From 4ab6446e16e34b0c9d82ca03f896235669905849 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?J=C3=BCrg=20Lehni?= <juerg@scratchdisk.com>
Date: Sat, 8 Nov 2014 17:26:13 -0800
Subject: [PATCH] Handle horizontal lines properly in Line.getSignedDistance()

Closes #546.
---
 src/basic/Line.js | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/basic/Line.js b/src/basic/Line.js
index d991dd03..64298abd 100644
--- a/src/basic/Line.js
+++ b/src/basic/Line.js
@@ -166,7 +166,8 @@ var Line = Base.extend(/** @lends Line# */{
                 vx -= px;
                 vy -= py;
             }
-            // Cache these values since they're used heavily in fatline code
+            if (Numerical.isZero(vx))
+                return x - px;
             var m = vy / vx, // slope
                 b = py - m * px; // y offset
             // Distance to the linear equation