3 This file is part of libmspgl
4 Copyright © 2007-2008, 2010-2011 Mikko Rasa, Mikkosoft Productions
5 Distributed under the LGPL
8 #ifndef MSP_GL_OBJETCINSTANCE_H_
9 #define MSP_GL_OBJETCINSTANCE_H_
12 #include "renderable.h"
21 Represents a single instance of an Object. An application can derive another
22 class from this and overload the hook functions to specify location and other
23 instance-specific parameters for the rendered objects.
25 class ObjectInstance: public Renderable
31 ObjectInstance(const Object &);
33 const Object &get_object() const { return object; }
34 virtual long get_instance_key() const { return reinterpret_cast<long>(&object); }
36 virtual void render(const Tag &tag = Tag()) const;
37 virtual void render(Renderer &, const Tag & = Tag()) const;
39 /** Hook function, called from Object just before rendering the mesh.
40 Renderer state will have been pushed before this is called. */
41 virtual void setup_render(Renderer &, const Tag &) const { }
43 /** Hook function, called from Object right after rendering the mesh. Since
44 Object takes care of pushing Renderer state, this rarely needs to do
46 virtual void finish_render(Renderer &, const Tag &) const { }
48 virtual unsigned get_level_of_detail() const { return 0; }