From 22a7f464603069e286d406f75795ef7eabbc3b13 Mon Sep 17 00:00:00 2001
From: "Mr.doob" <info@mrdoob.com>
Date: Thu, 12 Apr 2012 02:25:24 +0200
Subject: [PATCH] This should avoid people adding stuff that it's not an
 Object3D to the Scene Graph. Also, checking if the object is already a
 children is a bit redudant (the next lines code takes care of that
 indirectly).

---
 src/core/Object3D.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/core/Object3D.js b/src/core/Object3D.js
index 6c361cd877..97f3682404 100644
--- a/src/core/Object3D.js
+++ b/src/core/Object3D.js
@@ -114,7 +114,7 @@ THREE.Object3D.prototype = {
 
 		}
 
-		if ( this.children.indexOf( object ) === - 1 ) {
+		if ( object instanceof THREE.Object3D ) { // && this.children.indexOf( object ) === - 1
 
 			if ( object.parent !== undefined ) {
 
-- 
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