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+/*
+ * ***** BEGIN GPL LICENSE BLOCK *****
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ * The Original Code is Copyright (C) 2010 Blender Foundation.
+ * All rights reserved.
+ *
+ * The Original Code is: all of this file.
+ *
+ * Contributor(s): none yet.
+ *
+ * ***** END GPL LICENSE BLOCK *****
+ */
+
+#ifndef __FREESTYLE_NODE_GROUP_H__
+#define __FREESTYLE_NODE_GROUP_H__
+
+/** \file blender/freestyle/intern/scene_graph/NodeGroup.h
+ *  \ingroup freestyle
+ *  \brief Class to represent a group node. This node can contains several children.
+ *  \brief It also contains a transform matrix indicating the transform state of the underlying children.
+ *  \author Stephane Grabli
+ *  \date 24/01/2002
+ */
+
+#include <vector>
+
+#include "Node.h"
+
+#include "../system/FreestyleConfig.h"
+
+using namespace std;
+
+class LIB_SCENE_GRAPH_EXPORT NodeGroup : public Node
+{
+public:
+	inline NodeGroup(): Node() {}
+	virtual ~NodeGroup(){}
+
+	/*! Adds a child. Makes a addRef on the iChild reference counter */
+	virtual void AddChild(Node *iChild);
+
+	/*! destroys all the underlying nodes 
+	 *  Returns the reference counter after having done a release()
+	 */
+	virtual int destroy();
+
+	/*! Detaches all the children */
+	virtual void DetachChildren();
+
+	/*! Detached the sepcified child */
+	virtual void DetachChild(Node *iChild);
+
+	/*! Retrieve children */
+	virtual void RetrieveChildren(vector<Node*>& oNodes);
+
+	/*! Renders every children */
+//	virtual void Render(Renderer *iRenderer);
+
+	/*! Accept the corresponding visitor */
+	virtual void accept(SceneVisitor& v);
+
+	/*! Updates the BBox */
+	virtual const BBox<Vec3r>& UpdateBBox();
+
+	/*! Returns the number of children */
+	virtual int numberOfChildren()
+	{
+		return _Children.size();
+	}
+
+protected:
+	vector<Node*> _Children;
+};
+
+#endif // __FREESTYLE_NODE_GROUP_H__