From 9e1dbd0a5b023135e95036488e31579073c3ef3a Mon Sep 17 00:00:00 2001
From: Walter Bender <walter@sugarlabs.org>
Date: Mon, 03 Feb 2014 19:38:33 +0000
Subject: fix index bug

---
(limited to 'activity.py')

diff --git a/activity.py b/activity.py
index 446684d..0166515 100644
--- a/activity.py
+++ b/activity.py
@@ -609,8 +609,8 @@ class PhysicsActivity(activity.Activity):
     def _add_shared_chain(self, data):
         joint_data = json.loads(data)
         vertices = joint_data[0]
-        link_length = joint_data[2]
-        radius = joint_data[3]
+        link_length = joint_data[1]
+        radius = joint_data[2]
         self._constructors['Chain'](vertices, link_length, radius,
                                     share=False)
 
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