From 072f85e2b17cf9454ffcd9251e1a215d3fc3a43d Mon Sep 17 00:00:00 2001
From: John Firebaugh <john.firebaugh@gmail.com>
Date: Tue, 12 Feb 2013 13:24:09 -0800
Subject: [PATCH] Redraw nodes that move off the screen (fixes #735)

---
 js/id/core/difference.js | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/js/id/core/difference.js b/js/id/core/difference.js
index e2159271a..15ae88df3 100644
--- a/js/id/core/difference.js
+++ b/js/id/core/difference.js
@@ -89,7 +89,9 @@ iD.Difference = function (base, head) {
                 b = change.base,
                 entity = h || b;
 
-            if (extent && !entity.intersects(extent, h ? head : base))
+            if (extent &&
+                (!h || !h.intersects(extent, head)) &&
+                (!b || !b.intersects(extent, base)))
                 continue;
 
             result[id] = h;