Generalize instancing to all Renderables

[libs/gl.git] / source / renderable.h

diff --git a/source/renderable.h b/source/renderable.h
index e96ac77a853a96b9de09a30baa41096f70f3eef8..9fe46956540d4af243e61b2a9316c7eb08ccf020 100644 (file)
--- a/source/renderable.h
+++ b/source/renderable.h
@@ -1,7 +1,7 @@
 /* $Id$
 
 This file is part of libmspgl
-Copyright © 2007  Mikko Rasa, Mikkosoft Productions
+Copyright © 2007, 2011  Mikko Rasa, Mikkosoft Productions
 Distributed under the LGPL
 */
 
@@ -14,11 +14,20 @@ Distributed under the LGPL
 namespace Msp {
 namespace GL {
 
+class Renderer;
+
 class Renderable
 {
+protected:
+       Renderable() { }
 public:
-       virtual bool has_pass(const Tag &tag) const =0;
-       virtual void render(const Tag &tag=Tag()) const =0;
+       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;
 };
 
 } // namespace Msp