From 686abaa3677216eef40681ca476da14d85bcb6c1 Mon Sep 17 00:00:00 2001
From: Dennis Hotson <dennis@99designs.com>
Date: Sat, 26 Nov 2011 13:56:10 +1100
Subject: [PATCH] Avoid divide by zero and massive forces at small distances

---
 springy.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/springy.js b/springy.js
index 314a833..6923ab6 100644
--- a/springy.js
+++ b/springy.js
@@ -305,7 +305,7 @@ Layout.ForceDirected.prototype.applyCoulombsLaw = function() {
 			if (point1 !== point2)
 			{
 				var d = point1.p.subtract(point2.p);
-				var distance = d.magnitude();
+				var distance = d.magnitude() + 0.1; // avoid massive forces at small distances (and divide by zero)
 				var direction = d.normalise();
 
 				// apply force to each end point