X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=source%2Frender%2Fobjectinstance.h;h=5c36113daee00c89d7d9c8ba9a4931a603f584c9;hb=9e63512930bc7dace6dc169c65161961e5dcfcf6;hp=4d3e858b75e0915fe106ce320309855cca778154;hpb=70d9d2d28e5fe723c6b46894276e4c935f578e2d;p=libs%2Fgl.git

diff --git a/source/render/objectinstance.h b/source/render/objectinstance.h
index 4d3e858b..5c36113d 100644
--- a/source/render/objectinstance.h
+++ b/source/render/objectinstance.h
@@ -9,9 +9,11 @@ namespace Msp {
 namespace GL {
 
 /**
-Represents a single instance of an Object.  Thanks to being derived from
-Placeable in can be positioned without additional effort.  Other instance
-parameters can be set by overriding the hook functions.
+Represents a single instance of an Object.  A model matrix is provided through
+the Placeable base class.
+
+The state used to render the object can be customized by overriding the
+setup_render() and finish_render() functions.
 */
 class ObjectInstance: public PlacedRenderable
 {
@@ -32,21 +34,22 @@ public:
 	ObjectInstance(const Object &);
 
 	const Object &get_object() const { return object; }
-	virtual IntPtr get_instance_key() const { return reinterpret_cast<IntPtr>(&object); }
 
 	virtual const Geometry::BoundingSphere<float, 3> *get_bounding_sphere() const { return object.get_bounding_sphere(); }
 
-	virtual void render(Renderer &, const Tag & = Tag()) const;
+	virtual void render(Renderer &, Tag = Tag()) const;
 
 	/** Hook function, called from Object just before rendering the mesh.
 	Renderer state will have been pushed before this is called. */
-	virtual void setup_render(Renderer &, const Tag &) const;
+	virtual void setup_render(Renderer &, Tag) const;
 
 	/** Hook function, called from Object right after rendering the mesh.  Since
 	Object takes care of pushing Renderer state, this rarely needs to do
 	anything. */
-	virtual void finish_render(Renderer &, const Tag &) const { }
+	virtual void finish_render(Renderer &, Tag) const { }
 
+	/** Returns the level of detail to render this instance with.  This function
+	should apply LoD bias from the Renderer if desired. */
 	virtual unsigned get_level_of_detail(const Renderer &) const;
 };