-/* $Id$
-
-This file is part of libmspgl
-Copyright © 2007, 2011 Mikko Rasa, Mikkosoft Productions
-Distributed under the LGPL
-*/
-
#ifndef MSP_GL_RENDERABLE_H_
#define MSP_GL_RENDERABLE_H_
public:
virtual ~Renderable() { }
+ /** Returns a key used for grouping Renderables in an InstanceScene. */
+ virtual long get_instance_key() const { return 0; }
+
virtual void render(const Tag & = Tag()) const;
virtual void render(Renderer &, const Tag & = Tag()) const;
};