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
{
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;
};